[EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Pestka, Dennis J
I just completed a Lithium installation on my 65 Datsun. I'm resetting the parameters on my Link-10 E-Meter, and was curious what Puekert Exponent people were using. Based on what I've read, I was tempted to use 1.00, but wasn't sure if this was right. Have (50) 180 ah CALB CA series cells,

Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Zeke Yewdall
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Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Willie2
On 05/07/2014 09:08 AM, Bill Dube wrote: I used a setting of 1.00 on my pack of 100 Ah ThunderSky cells. Seemed to work just fine. Yep, 1. You are likely to find the meter counts back to nearly exactly zero on charging. That's a good indication you are getting almost all the charge energy

Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Pestka, Dennis J
Sounds great, 1.00 it is ! I'm really looking forward to doing some range testing this weekend. I've been stuck at ~ 20 miles for quite a while. Living out in a rural area didn't give me a lot of options of places to go. I've been averaging ~ 250 - 275 Whr. per mile. Now I should be able to go

Re: [EVDL] Michael's MTD conversion: belts matter

2014-05-07 Thread Evan Tuer
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Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Lee Hart
Bill Dube wrote: I used a setting of 1.00 on my pack of 100 Ah ThunderSky cells. Seemed to work just fine. 1.0 will work; it just means the E-meter/Link-10 won't take discharge current into account for its battery empty-full lights. It will still indicate low battery voltage when the pack is

Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Lee Hart
Bill Dube wrote: I used a setting of 1.00 on my pack of 100 Ah ThunderSky cells. Seemed to work just fine. Willie2 wrote: Yep, 1. You are likely to find the meter counts back to nearly exactly zero on charging. That's a good indication you are getting almost all the charge energy back on

Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread EVDL Administrator
On 7 May 2014 at 11:45, Lee Hart wrote: Your best bet is to use the Link-10 to measure the actual capacity of the pack at two different rates of discharge. There's an equation in the manual to calculate the Peukert exponent from that data. And an online calculator here :

Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Lee Hart
Pestka, Dennis J wrote: So let me ask another question. Using this E-Meter to track the state of my pack, am I better to watch: - Kwhr's used - Ahr's used - % Remaining - Voltage at state of rest. - Something else ? When you don't know much about the pack, I would watch voltage

Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Pestka, Dennis J
Thanks Lee. Dennis -Original Message- From: ev-boun...@lists.evdl.org [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lee Hart Sent: Wednesday, May 07, 2014 1:37 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Peukert # with Lithium Batteries Pestka, Dennis J wrote: So let

Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Bill Dube
The internal resistance of a battery does not change it's Ahr capacity. Not even a tiny amount. (If the is very large, it may change how you pick when 100% DOD is reached, however.) The same number of amps will flow. The voltage will depend upon the internal resistance, but not the Ahrs.

Re: [EVDL] Peukert # with Lithium Batteries

2014-05-07 Thread Ben Apollonio
With all due respect to Lee and his expertise in so many areas, I believe this is incorrect. Lithium Ion has a nearly unity coulometric charge/discharge efficiency. Although high discharge rates depress the voltage more, and therefore cause your battery to reach empty sooner, you haven't

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2014-05-07 Thread dr via EV
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2014-05-07 Thread EVDL Administrator via EV
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2014-05-07 Thread Thos True via EV
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