I thought this question was banal. But, so far, everyone is speculating. Let me put it in a more abstract form:

Experiment A.

1. Charge a li-ion battery, starting at voltage V1 at temp T1 with amount W1 kWh to voltage V2.
2. Cool it to temp T2.
3. Discharge it at rate A amps, where A is low enough not to cause ion plating or other damage, to voltage V1.

How many kWh, W2, will you get from step 3 ?

Experiment B.

1. Charge a the battery, starting at voltage V1 at temp T2 (from step A3 above) to voltage V2 with amount W3.

How many kWh is W3 ?

------

One of you indicated that the internal resistance will increase with a temperature drop. That sounds reasonable, so I would expect W2 to be a little less than W1. But my empirical evidence says that W2 will still be much larger than W3. That is the phenomena I'm trying to validate.

Peri

<< Annoyed by leaf blowers ? https://quietcleanseattle.org/ >>

------ Original Message ------
From: "Jay Summet via EV" <ev@lists.evdl.org>
To: "Peri Hartman via EV" <ev@lists.evdl.org>
Cc: "Jay Summet" <j...@summet.com>
Sent: 04-Apr-22 03:33:36
Subject: Re: [EVDL] kWh versus charging temperature



I'm sure that if you kept your Leaf inside a warm garage anytime you were not 
driving it, it's cold weather range would be better than if you park it 
outside.  (However, it may not be as high as it's normal warm weather range, 
especially if you use the resistive cabin air heater.)

Jay
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