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Need Range
by PETE COX
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Hello all. I am new to the EV scene and have a question. This may have been answered before, I searched the archives, but did not see the same question, so forgive me if it has been answered.
I converted a '91 VW Golf to a 72v system. I used a 40HP D&D motor and am running 12v Energizer Deep Cycle Marine Batteries. I live in a hilly area of NC with a hill near my home being 1 mile in length. I travel approx 8 miles to work in this terrain and when I get there there is another hill leading to the work site. I craw up that hill at a snails pace. My voltage (on the voltmeter inside the car) drops to approx 50v. I can pull no more than 50 amps at this time and probably less. I do not have a "Fluke" or other quality meter inside the car, so I am going by the gages that I mounted. As I understand more and more about EV'S I see that my battery choice probably was not in my best interests. I cannot afford new batteries now so here is the question. I am allowed to charge at work and only need enough to get up the hill. I tried an experiment paralleling another battery into the series string with no results. I did this with jumper cables and disconnected it immediately after arriving to work. Since my voltage is so low, would putting this battery (in series) into the series string with a disconnect help in any way? Thank you for any help in this matter. I have stopped driving the car to work because I do not want to pull the batteries down so low. Just to note, I have increased air pressure in the tires to 45psi, made sure the front end was aligned and in good shape and I drive conservatively. Coasting to stops, etc. The car coasts like crazy. Thanks again, Pete Cox _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev |
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Re: Need Range
by matt-255
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Hi Pete,
Just a clarification, that battery you put in parrallel, just how did you do that? If you put it across the entire pack, unless it was a 72v battery, it would cause some *very* big voltage sag. How big is this extra battery? If it is the same size as the rest, I would suggest putting it in series all the time. On anther note, what are the specifications of these energiser marine batteries? Do you have a link to a data sheet? What instrumentation do you have aside from a battery side volt meter? Do you have a battery side amp meter? What is your cruising amp draw? Matt -----Original Message----- From: ev-bounces@... [mailto:ev-bounces@...] On Behalf Of PETE COX Sent: Tuesday, 30 September 2008 7:00 PM To: ev@... Subject: [EVDL] Need Range Hello all. I am new to the EV scene and have a question. This may have been answered before, I searched the archives, but did not see the same question, so forgive me if it has been answered. I converted a '91 VW Golf to a 72v system. I used a 40HP D&D motor and am running 12v Energizer Deep Cycle Marine Batteries. I live in a hilly area of NC with a hill near my home being 1 mile in length. I travel approx 8 miles to work in this terrain and when I get there there is another hill leading to the work site. I craw up that hill at a snails pace. My voltage (on the voltmeter inside the car) drops to approx 50v. I can pull no more than 50 amps at this time and probably less. I do not have a "Fluke" or other quality meter inside the car, so I am going by the gages that I mounted. As I understand more and more about EV'S I see that my battery choice probably was not in my best interests. I cannot afford new batteries now so here is the question. I am allowed to charge at work and only need enough to get up the hill. I tried an experiment paralleling another battery into the series string with no results. I did this with jumper cables and disconnected it immediately after arriving to work. Since my voltage is so low, would putting this battery (in series) into the series string with a disconnect help in any way? Thank you for any help in this matter. I have stopped driving the car to work because I do not want to pull the batteries down so low. Just to note, I have increased air pressure in the tires to 45psi, made sure the front end was aligned and in good shape and I drive conservatively. Coasting to stops, etc. The car coasts like crazy. Thanks again, Pete Cox _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.7.2/1690 - Release Date: 25/09/2008 7:05 AM _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev |
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Re: Need Range
by PETE COX
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I put the battery in parallel with the last battery on the series string. - and b+? . It is the same size as the other batteries and I tried putting it in series, but the controller shut off (Alltrax) when it saw the 84 VDC. I took it out not wanting to burn anything up. That is why I wondered when I get close to work and the voltage is low, I can put the battery in series. I am not sure of the data sheet, I would have to research that. Yes, I do have an amp meter. I try to keep amps under 100 when crusing, but it goes 150-175 up the hill. Hard to keep up with traffic or keep from getting ran over at these amp ranges though.
----- Original Message ----- From: matt <mc.lacey@...> To: 'Electric Vehicle Discussion List' <ev@...> Sent: Tue, 30 Sep 2008 08:32:43 -0400 (EDT) Subject: Re: [EVDL] Need Range Hi Pete, Just a clarification, that battery you put in parrallel, just how did you do that? If you put it across the entire pack, unless it was a 72v battery, it would cause some *very* big voltage sag. How big is this extra battery? If it is the same size as the rest, I would suggest putting it in series all the time. On anther note, what are the specifications of these energiser marine batteries? Do you have a link to a data sheet? What instrumentation do you have aside from a battery side volt meter? Do you have a battery side amp meter? What is your cruising amp draw? Matt -----Original Message----- From: ev-bounces@... [mailto:ev-bounces@...] On Behalf Of PETE COX Sent: Tuesday, 30 September 2008 7:00 PM To: ev@... Subject: [EVDL] Need Range Hello all. I am new to the EV scene and have a question. This may have been answered before, I searched the archives, but did not see the same question, so forgive me if it has been answered. I converted a '91 VW Golf to a 72v system. I used a 40HP D&D motor and am running 12v Energizer Deep Cycle Marine Batteries. I live in a hilly area of NC with a hill near my home being 1 mile in length. I travel approx 8 miles to work in this terrain and when I get there there is another hill leading to the work site. I craw up that hill at a snails pace. My voltage (on the voltmeter inside the car) drops to approx 50v. I can pull no more than 50 amps at this time and probably less. I do not have a "Fluke" or other quality meter inside the car, so I am going by the gages that I mounted. As I understand more and more about EV'S I see that my battery choice probably was not in my best interests. I cannot afford new batteries now so here is the question. I am allowed to charge at work and only need enough to get up the hill. I tried an experiment paralleling another battery into the series string with no results. I did this with jumper cables and disconnected it immediately after arriving to work. Since my voltage is so low, would putting this battery (in series) into the series string with a disconnect help in any way? Thank you for any help in this matter. I have stopped driving the car to work because I do not want to pull the batteries down so low. Just to note, I have increased air pressure in the tires to 45psi, made sure the front end was aligned and in good shape and I drive conservatively. Coasting to stops, etc. The car coasts like crazy. Thanks again, Pete Cox _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.7.2/1690 - Release Date: 25/09/2008 7:05 AM _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev |
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Re: Need Range
by matt-255
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Ah k.
What are the batteries called? Perhaps google can help here. Matt -----Original Message----- From: ev-bounces@... [mailto:ev-bounces@...] On Behalf Of PETE COX Sent: Tuesday, 30 September 2008 8:59 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Need Range I put the battery in parallel with the last battery on the series string. - and b+? . It is the same size as the other batteries and I tried putting it in series, but the controller shut off (Alltrax) when it saw the 84 VDC. I took it out not wanting to burn anything up. That is why I wondered when I get close to work and the voltage is low, I can put the battery in series. I am not sure of the data sheet, I would have to research that. Yes, I do have an amp meter. I try to keep amps under 100 when crusing, but it goes 150-175 up the hill. Hard to keep up with traffic or keep from getting ran over at these amp ranges though. ----- Original Message ----- From: matt <mc.lacey@...> To: 'Electric Vehicle Discussion List' <ev@...> Sent: Tue, 30 Sep 2008 08:32:43 -0400 (EDT) Subject: Re: [EVDL] Need Range Hi Pete, Just a clarification, that battery you put in parrallel, just how did you do that? If you put it across the entire pack, unless it was a 72v battery, it would cause some *very* big voltage sag. How big is this extra battery? If it is the same size as the rest, I would suggest putting it in series all the time. On anther note, what are the specifications of these energiser marine batteries? Do you have a link to a data sheet? What instrumentation do you have aside from a battery side volt meter? Do you have a battery side amp meter? What is your cruising amp draw? Matt -----Original Message----- From: ev-bounces@... [mailto:ev-bounces@...] On Behalf Of PETE COX Sent: Tuesday, 30 September 2008 7:00 PM To: ev@... Subject: [EVDL] Need Range Hello all. I am new to the EV scene and have a question. This may have been answered before, I searched the archives, but did not see the same question, so forgive me if it has been answered. I converted a '91 VW Golf to a 72v system. I used a 40HP D&D motor and am running 12v Energizer Deep Cycle Marine Batteries. I live in a hilly area of NC with a hill near my home being 1 mile in length. I travel approx 8 miles to work in this terrain and when I get there there is another hill leading to the work site. I craw up that hill at a snails pace. My voltage (on the voltmeter inside the car) drops to approx 50v. I can pull no more than 50 amps at this time and probably less. I do not have a "Fluke" or other quality meter inside the car, so I am going by the gages that I mounted. As I understand more and more about EV'S I see that my battery choice probably was not in my best interests. I cannot afford new batteries now so here is the question. I am allowed to charge at work and only need enough to get up the hill. I tried an experiment paralleling another battery into the series string with no results. I did this with jumper cables and disconnected it immediately after arriving to work. Since my voltage is so low, would putting this battery (in series) into the series string with a disconnect help in any way? Thank you for any help in this matter. I have stopped driving the car to work because I do not want to pull the batteries down so low. Just to note, I have increased air pressure in the tires to 45psi, made sure the front end was aligned and in good shape and I drive conservatively. Coasting to stops, etc. The car coasts like crazy. Thanks again, Pete Cox _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.7.2/1690 - Release Date: 25/09/2008 7:05 AM _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.7.5 - Release Date: 28/09/2008 12:00 AM _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev |
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Re: Need Range
by Bob Bath
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I hate to throw this at you, but I shred hills. The difference? Another 72 volts and probably twice the cost in batteries and controller that you spent.
Be very careful about reversing cells on that hill. If for example, I take my 144V pack as it is almost discharged, and push the accelerator and go below 126, I'm jeopardizing the pack. peace, Thinking about converting a gen. 5 ('92-95) Honda Civic? My $23 "CivicWithACord" DVD (57 mins.) shows ins and outs you'll encounter converting the sedan; the del Sol, or the hatchback. Each runs 144V/18 batteries. Primary focus on component/instrumentation/ battery placement and other considerations. For more info, http://home.budget.net/~bbath/CivicWithACord.html ____ __/__|__\__ =D-------/ - - \ 'O'-----'O'-' Would you still drive your car if the tailpipe came out of the steering wheel? OR Lic. "LCTRNS" --- On Tue, 9/30/08, matt <mc.lacey@...> wrote: > From: matt <mc.lacey@...> > Subject: Re: [EVDL] Need Range > To: "'Electric Vehicle Discussion List'" <ev@...> > Date: Tuesday, September 30, 2008, 5:32 AM > Hi Pete, > > Just a clarification, that battery you put in parrallel, > just how did you do > that? > If you put it across the entire pack, unless it was a 72v > battery, it would > cause some *very* big voltage sag. > > How big is this extra battery? If it is the same size as > the rest, I would > suggest putting it in series all the time. > On anther note, what are the specifications of these > energiser marine > batteries? > Do you have a link to a data sheet? > > What instrumentation do you have aside from a battery side > volt meter? > Do you have a battery side amp meter? What is your cruising > amp draw? > > Matt > > -----Original Message----- > From: ev-bounces@... > [mailto:ev-bounces@...] On Behalf > Of PETE COX > Sent: Tuesday, 30 September 2008 7:00 PM > To: ev@... > Subject: [EVDL] Need Range > > Hello all. I am new to the EV scene and have a question. > This may have been > answered before, I searched the archives, but did not see > the same question, > so forgive me if it has been answered. > > I converted a '91 VW Golf to a 72v system. I used a > 40HP D&D motor and am > running 12v Energizer Deep Cycle Marine Batteries. I live > in a hilly area > of NC with a hill near my home being 1 mile in length. I > travel approx 8 > miles to work in this terrain and when I get there there is > another hill > leading to the work site. I craw up that hill at a snails > pace. My voltage > (on the voltmeter inside the car) drops to approx 50v. I > can pull no more > than 50 amps at this time and probably less. I do not have > a "Fluke" or > other quality meter inside the car, so I am going by the > gages that I > mounted. As I understand more and more about EV'S I > see that my battery > choice probably was not in my best interests. I cannot > afford new batteries > now so here is the question. > > I am allowed to charge at work and only need enough to get > up the hill. I > tried an experiment paralleling another battery into the > series string with > no results. I did this with jumper cables and disconnected > it immediately > after arriving to work. Since my voltage is so low, would > putting this > battery (in series) into the series string with a > disconnect help in any > way? > > Thank you for any help in this matter. I have stopped > driving the car to > work because I do not want to pull the batteries down so > low. Just to note, > I have increased air pressure in the tires to 45psi, made > sure the front > end was aligned and in good shape and I drive > conservatively. Coasting to > stops, etc. > > The car coasts like crazy. > > Thanks again, > > Pete Cox > > _______________________________________________ > General EVDL support: http://evdl.org/help/ Usage > guidelines: > http://evdl.org/help/index.html#conv > Archives: http://evdl.org/archive/ > Subscription options: > http://lists.sjsu.edu/mailman/listinfo/ev > > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.524 / Virus Database: 270.7.2/1690 - Release > Date: 25/09/2008 > 7:05 AM > > _______________________________________________ > General EVDL support: http://evdl.org/help/ > Usage guidelines: http://evdl.org/help/index.html#conv > Archives: http://evdl.org/archive/ > Subscription options: > http://lists.sjsu.edu/mailman/listinfo/ev _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev |
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Re: Need Range
by PETE COX
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They are Energizer Deep Cycle Marine Batteries. I am at work now so do not have access to the label on the batteries. They said deep cycle on the front of the battery and also on the top along with amp ratings was the letters DC or DP? not sure now. Will look when I get home. Thinking I made a mistake with these. Just would like to correct the problem and be able to get to work and use the pack until it cannot be used any more. I am charging overnight with a ten amp charger at 72v and once a week or so after they are charged, I run 5a thru for a couple hours. They seem to take a charge well and I have not noticed a negative change in range since new.
----- Original Message ----- From: matt <mc.lacey@...> To: 'Electric Vehicle Discussion List' <ev@...> Sent: Tue, 30 Sep 2008 09:19:11 -0400 (EDT) Subject: Re: [EVDL] Need Range Ah k. What are the batteries called? Perhaps google can help here. Matt -----Original Message----- From: ev-bounces@... [mailto:ev-bounces@...] On Behalf Of PETE COX Sent: Tuesday, 30 September 2008 8:59 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Need Range I put the battery in parallel with the last battery on the series string. - and b+? . It is the same size as the other batteries and I tried putting it in series, but the controller shut off (Alltrax) when it saw the 84 VDC. I took it out not wanting to burn anything up. That is why I wondered when I get close to work and the voltage is low, I can put the battery in series. I am not sure of the data sheet, I would have to research that. Yes, I do have an amp meter. I try to keep amps under 100 when crusing, but it goes 150-175 up the hill. Hard to keep up with traffic or keep from getting ran over at these amp ranges though. ----- Original Message ----- From: matt <mc.lacey@...> To: 'Electric Vehicle Discussion List' <ev@...> Sent: Tue, 30 Sep 2008 08:32:43 -0400 (EDT) Subject: Re: [EVDL] Need Range Hi Pete, Just a clarification, that battery you put in parrallel, just how did you do that? If you put it across the entire pack, unless it was a 72v battery, it would cause some *very* big voltage sag. How big is this extra battery? If it is the same size as the rest, I would suggest putting it in series all the time. On anther note, what are the specifications of these energiser marine batteries? Do you have a link to a data sheet? What instrumentation do you have aside from a battery side volt meter? Do you have a battery side amp meter? What is your cruising amp draw? Matt -----Original Message----- From: ev-bounces@... [mailto:ev-bounces@...] On Behalf Of PETE COX Sent: Tuesday, 30 September 2008 7:00 PM To: ev@... Subject: [EVDL] Need Range Hello all. I am new to the EV scene and have a question. This may have been answered before, I searched the archives, but did not see the same question, so forgive me if it has been answered. I converted a '91 VW Golf to a 72v system. I used a 40HP D&D motor and am running 12v Energizer Deep Cycle Marine Batteries. I live in a hilly area of NC with a hill near my home being 1 mile in length. I travel approx 8 miles to work in this terrain and when I get there there is another hill leading to the work site. I craw up that hill at a snails pace. My voltage (on the voltmeter inside the car) drops to approx 50v. I can pull no more than 50 amps at this time and probably less. I do not have a "Fluke" or other quality meter inside the car, so I am going by the gages that I mounted. As I understand more and more about EV'S I see that my battery choice probably was not in my best interests. I cannot afford new batteries now so here is the question. I am allowed to charge at work and only need enough to get up the hill. I tried an experiment paralleling another battery into the series string with no results. I did this with jumper cables and disconnected it immediately after arriving to work. Since my voltage is so low, would putting this battery (in series) into the series string with a disconnect help in any way? Thank you for any help in this matter. I have stopped driving the car to work because I do not want to pull the batteries down so low. Just to note, I have increased air pressure in the tires to 45psi, made sure the front end was aligned and in good shape and I drive conservatively. Coasting to stops, etc. The car coasts like crazy. Thanks again, Pete Cox _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.7.2/1690 - Release Date: 25/09/2008 7:05 AM _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 270.7.5 - Release Date: 28/09/2008 12:00 AM _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev |
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Re: Need Range
by storm connors
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I have heard you make this statement before. With my batteries half
down, I struggle to keep my batteries over 110v under load going up the three mile hill to my house. To keep 35mph requires 200 amps, but I frequently am using 50 or less and going 10-15 mph. Once the load is removed the voltage rebounds to 135 or so in a few seconds. I have the same setup as you, 144v pack of 8v batteries with a Raptor controller. On Tue, Sep 30, 2008 at 9:17 AM, Bob Bath <civicwithacord@...> wrote: > I hate to throw this at you, but I shred hills. The difference? Another 72 volts and probably twice the cost in batteries and controller that you spent. > Be very careful about reversing cells on that hill. If for example, I take my 144V pack as it is almost discharged, and push the accelerator and go below 126, I'm jeopardizing the pack. > > peace, > > Thinking about converting a gen. 5 ('92-95) Honda Civic? My $23 "CivicWithACord" DVD (57 mins.) shows ins and outs you'll encounter converting the sedan; the del Sol, or the hatchback. Each runs 144V/18 batteries. Primary focus on component/instrumentation/ battery placement and other considerations. For more info, http://home.budget.net/~bbath/CivicWithACord.html > ____ > __/__|__\__ > =D-------/ - - \ > 'O'-----'O'-' > Would you still drive your car if the tailpipe came out of the steering wheel? > OR Lic. "LCTRNS" > > > --- On Tue, 9/30/08, matt <mc.lacey@...> wrote: > >> From: matt <mc.lacey@...> >> Subject: Re: [EVDL] Need Range >> To: "'Electric Vehicle Discussion List'" <ev@...> >> Date: Tuesday, September 30, 2008, 5:32 AM >> Hi Pete, >> >> Just a clarification, that battery you put in parrallel, >> just how did you do >> that? >> If you put it across the entire pack, unless it was a 72v >> battery, it would >> cause some *very* big voltage sag. >> >> How big is this extra battery? If it is the same size as >> the rest, I would >> suggest putting it in series all the time. >> On anther note, what are the specifications of these >> energiser marine >> batteries? >> Do you have a link to a data sheet? >> >> What instrumentation do you have aside from a battery side >> volt meter? >> Do you have a battery side amp meter? What is your cruising >> amp draw? >> >> Matt >> >> -----Original Message----- >> From: ev-bounces@... >> [mailto:ev-bounces@...] On Behalf >> Of PETE COX >> Sent: Tuesday, 30 September 2008 7:00 PM >> To: ev@... >> Subject: [EVDL] Need Range >> >> Hello all. I am new to the EV scene and have a question. >> This may have been >> answered before, I searched the archives, but did not see >> the same question, >> so forgive me if it has been answered. >> >> I converted a '91 VW Golf to a 72v system. I used a >> 40HP D&D motor and am >> running 12v Energizer Deep Cycle Marine Batteries. I live >> in a hilly area >> of NC with a hill near my home being 1 mile in length. I >> travel approx 8 >> miles to work in this terrain and when I get there there is >> another hill >> leading to the work site. I craw up that hill at a snails >> pace. My voltage >> (on the voltmeter inside the car) drops to approx 50v. I >> can pull no more >> than 50 amps at this time and probably less. I do not have >> a "Fluke" or >> other quality meter inside the car, so I am going by the >> gages that I >> mounted. As I understand more and more about EV'S I >> see that my battery >> choice probably was not in my best interests. I cannot >> afford new batteries >> now so here is the question. >> >> I am allowed to charge at work and only need enough to get >> up the hill. I >> tried an experiment paralleling another battery into the >> series string with >> no results. I did this with jumper cables and disconnected >> it immediately >> after arriving to work. Since my voltage is so low, would >> putting this >> battery (in series) into the series string with a >> disconnect help in any >> way? >> >> Thank you for any help in this matter. I have stopped >> driving the car to >> work because I do not want to pull the batteries down so >> low. Just to note, >> I have increased air pressure in the tires to 45psi, made >> sure the front >> end was aligned and in good shape and I drive >> conservatively. Coasting to >> stops, etc. >> >> The car coasts like crazy. >> >> Thanks again, >> >> Pete Cox >> >> _______________________________________________ >> General EVDL support: http://evdl.org/help/ Usage >> guidelines: >> http://evdl.org/help/index.html#conv >> Archives: http://evdl.org/archive/ >> Subscription options: >> http://lists.sjsu.edu/mailman/listinfo/ev >> >> >> >> -- >> No virus found in this incoming message. >> Checked by AVG. >> Version: 7.5.524 / Virus Database: 270.7.2/1690 - Release >> Date: 25/09/2008 >> 7:05 AM >> >> _______________________________________________ >> General EVDL support: http://evdl.org/help/ >> Usage guidelines: http://evdl.org/help/index.html#conv >> Archives: http://evdl.org/archive/ >> Subscription options: >> http://lists.sjsu.edu/mailman/listinfo/ev > > > > > _______________________________________________ > General EVDL support: http://evdl.org/help/ > Usage guidelines: http://evdl.org/help/index.html#conv > Archives: http://evdl.org/archive/ > Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev > > -- http://www.austinev.org/evalbum/1059 http://stormselectric.blogspot.com/ Storm _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev |
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Re: Need Range
by enganear
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Maybe I missed it, but what gear are you using on this hill? Do you know your motor rpm?
-Stephen Chapman
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Re: Need Range
by PETE COX
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There is a bridge before the hill and I try to gain speed over the bridge. The bridge and the hill are both traveled in third gear. Not sure of RPM. I could probably race up the hill, but I am trying to keep my amps low. I probably did not explain it well enough. I can get up the hill, I just try not to use too much juice. The problem is when I encounter the last hill on the way to work.. It is then that the car gives out. Not enough power left.
Thanks, Pete ----- Original Message ----- From: enganear <enganear@...> To: ev@... Sent: Wed, 1 Oct 2008 11:50:05 -0400 (EDT) Subject: Re: [EVDL] Need Range Maybe I missed it, but what gear are you using on this hill? Do you know your motor rpm? -Stephen Chapman PETE COX wrote: > > Hello all. I am new to the EV scene and have a question. This may have > been answered before, I searched the archives, but did not see the same > question, so forgive me if it has been answered. > > I converted a '91 VW Golf to a 72v system. I used a 40HP D&D motor and am > running 12v Energizer Deep Cycle Marine Batteries. I live in a hilly area > of NC with a hill near my home being 1 mile in length. I travel approx 8 > miles to work in this terrain and when I get there there is another hill > leading to the work site. I craw up that hill at a snails pace. My > voltage (on the voltmeter inside the car) drops to approx 50v. I can pull > no more than 50 amps at this time and probably less. I do not have a > "Fluke" or other quality meter inside the car, so I am going by the gages > that I mounted. As I understand more and more about EV'S I see that my > battery choice probably was not in my best interests. I cannot afford new > batteries now so here is the question. > > I am allowed to charge at work and only need enough to get up the hill. I > tried an experiment paralleling another battery into the series string > with no results. I did this with jumper cables and disconnected it > immediately after arriving to work. Since my voltage is so low, would > putting this battery (in series) into the series string with a disconnect > help in any way? > > Thank you for any help in this matter. I have stopped driving the car to > work because I do not want to pull the batteries down so low. Just to > note, I have increased air pressure in the tires to 45psi, made sure the > front end was aligned and in good shape and I drive conservatively. > Coasting to stops, etc. > > The car coasts like crazy. > > Thanks again, > > Pete Cox > > _______________________________________________ > General EVDL support: http://evdl.org/help/ > Usage guidelines: http://evdl.org/help/index.html#conv > Archives: http://evdl.org/archive/ > Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev > > > -- View this message in context: http://www.nabble.com/Need-Range-tp19740166p19763416.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev _______________________________________________ General EVDL support: http://evdl.org/help/ Usage guidelines: http://evdl.org/help/index.html#conv Archives: http://evdl.org/archive/ Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev |
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Re: Need Range
by enganear
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Using a lower gear would definitely lower your motor amps by increasing the mechanical advantage. If you do not have a way of monitoring motor rpm you can calculate the top speed in each gear by using the gear ratios, the final drive ratio and the revs/mile of the tire. You do not want to exceed the maximum motor rpm, but it looks to me that you should be attempting this hill in a lower gear than 3rd.
Maybe another VW golf owner can provide you the maximum speed in each gear to avoid overspeed. -Stephen Chapman
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Re: Need Range
by Bob Rice-2
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----- Original Message ----- From: "enganear" <enganear@...> To: <ev@...> Sent: Wednesday, October 01, 2008 12:18 PM Subject: Re: [EVDL] Need Range > > Using a lower gear would definitely lower your motor amps by increasing > the > mechanical advantage. If you do not have a way of monitoring motor rpm > you > can calculate the top speed in each gear by using the gear ratios, the > final > drive ratio and the revs/mile of the tire. You do not want to exceed the > maximum motor rpm, but it looks to me that you should be attempting this > hill in a lower gear than 3rd. > > Maybe another VW golf owner can provide you the maximum speed in each gear > to avoid overspeed. > -Stephen Chapman Hi Steve EVerybody; I feel that the speed curves are about the same with V-dubs, at least with Rabbits and Jeddi, shift about when ya would shift in a gas or Diseasel. I usuaslly start off in 2nd gear, though.Use yur 6th sense; when the speed fades or you peek out, SHIFT! The screeming motor is a dead givaway! Well, maybe guyz, nowadaze arent too familiar with stick shifts? Don't "LUG" the motor, ether! Lugging is trying to drive a gas rig in too HIGH a gear, as the engine stumbles trying to keep the wheels turning. The motor WILL keep things turning but the amp draw on yur Amp meter tells you of it's struggle! Think riding a 10 speed Schwin IN 10'th speed, you will burn up YOUR motor, peddling! It can't cry out in protest! and it will EVentually overheat and die. Jim Husted will be talking to you about a rebuild! I, too, use the old system perfected by 18 wheelers and Con Rail freight trains; Go like Hell down, so ya can coast MOST of the way up in higher gear and downshift as needed, TRYing to keep the "roll" up.Hoping the radar cop isn't at the BOTTOM of the hill?? So when the car gets to know you, er, I mean when YOU get to know the car, yur driving tecknique will improve? Think of yur first time out in a sailboat, and you were bummed out that you couldn't just POINT it where you wanted to go and go? You had to learn to "Tack" upwind, you DID, eventually, and kept Sea Tow at bay! And ya got better, showed yur verve,(nerve) and put up yur spinniker, to go like hell, on a broad reach! Just a learning curve thing as ya go! IF all that above helped? Sea Ya Bob > > > PETE COX wrote: >> >> There is a bridge before the hill and I try to gain speed over the >> bridge. >> The bridge and the hill are both traveled in third gear. Not sure of >> RPM. >> I could probably race up the hill, but I am trying to keep my amps low. >> I probably did not explain it well enough. I can get up the hill, I just >> try not to use too much juice. The problem is when I encounter the last >> hill on the way to work.. It is then that the car gives out. Not enough >> power left. >> >> Thanks, >> >> Pete >> ----- Original Message ----- >> From: enganear <enganear@...> >> To: ev@... >> Sent: Wed, 1 Oct 2008 11:50:05 -0400 (EDT) >> Subject: Re: [EVDL] Need Range >> >> >> Maybe I missed it, but what gear are you using on this hill? Do you know >> your motor rpm? >> -Stephen Chapman >> >> >> >> PETE COX wrote: >>> >>> Hello all. I am new to the EV scene and have a question. This may have >>> been answered before, I searched the archives, but did not see the same >>> question, so forgive me if it has been answered. >>> >>> I converted a '91 VW Golf to a 72v system. I used a 40HP D&D motor and >>> am >>> running 12v Energizer Deep Cycle Marine Batteries. I live in a hilly >>> area >>> of NC with a hill near my home being 1 mile in length. I travel approx >>> 8 >>> miles to work in this terrain and when I get there there is another hill >>> leading to the work site. I craw up that hill at a snails pace. My >>> voltage (on the voltmeter inside the car) drops to approx 50v. I can >>> pull >>> no more than 50 amps at this time and probably less. I do not have a >>> "Fluke" or other quality meter inside the car, so I am going by the >>> gages >>> that I mounted. As I understand more and more about EV'S I see that my >>> battery choice probably was not in my best interests. I cannot afford >>> new >>> batteries now so here is the question. >>> >>> I am allowed to charge at work and only need enough to get up the hill. >>> I >>> tried an experiment paralleling another battery into the series string >>> with no results. I did this with jumper cables and disconnected it >>> immediately after arriving to work. Since my voltage is so low, would >>> putting this battery (in series) into the series string with a >>> disconne |
