On Sun, 27 Mar 2022 at 23:29, Bill Dube via EV wrote:
> The voltage on a lead-acid battery goes _up_ in cold weather, by the way.
A temperature compensated charger will use a higher charge voltage in
cold weather.
The open circuit voltage goes down with temperature, Lead Acid
typically has a th
On 3/28/22 10:23, Peri Hartman via EV wrote:
I've got another data point to add to these observations. I still have
the original battery in my 2011 leaf. I'm thinking I'd better swap it
out before I get stalled somewhere...
Anyway, one thing that might be different from others' experiences
Another factor is, as I recall, the timid Leaf regen. "One pedal
driving" is much more difficult than with an EV with aggressive regen.
I found I was asking myself "Why are there brake complaints?" . Then, I
realized that friction braking may create a 12v load while regen likely
does not.
ot;
To: ev@lists.evdl.org
Cc: "Jay Summet"
Sent: 28-Mar-22 07:08:36
Subject: Re: [EVDL] Followup: Nissan Leaf 2013 Cold Brake (dropout)
Recall
This is one of the reasons that Leaf's (at least that era...they may have made
improvements on later models) chew through 12v access
This is one of the reasons that Leaf's (at least that era...they may
have made improvements on later models) chew through 12v accessory
batteries. They only rarely take them up to 14v for charging. I don't
know of a way to change any settings to resolve this.
An external battery tender or ch
Thanks Paul
I know it should be but I don’t know how to adjust the leaf dc dc converter. Do
you ?
Best regards
Mark
Sent from my iPhone
On Mar 28, 2022, at 8:00 AM, paul dove wrote:
The minimum charging voltage is 13.8 volts dc across the battery terminals,
or at the output of the alternat
The float voltage is 13.5 to 13.8 volts. That is what you would expect
to see on the battery terminals when the car has been running for
awhile. Charging begins at about 13 volts, BTW. All these voltages are
at 25 Celsius. Colder means higher charging voltage (and float voltage.)
Hotter means l
The minimum charging voltage is 13.8 volts dc across the battery terminals, or
at the output of the alternator. A single lead-acid cell starts to charge at
anything over 2.25 volts. Since a 12 volt battery has six cells, any 12 volt
lead-acid battery needs at least 13.8 volts to start to charge.
Bill is right, the DC-DC cannot be expected to provide all the power,
especially for transient loads. Both the brake booster and the power
steering can draw large surges of power, this is one of the reasons why
most EVs still have a big old lead-acid battery. (bus stability)
In a normal ICE car,
The voltage on a lead-acid battery goes _up_ in cold weather, by the way.
Under load in cold weather, however, the higher impedance will tend to
make the 12 volt battery voltage sag under load.
But the the vehicle DC-DC is working when the brake issue arises, so the
battery will play a smalle
Hi Folks,
I checked the 12V aux voltage through the cigarette lighter socket with a
DVM and shows 13.0V during operation. The low voltage storage codes over
time were caused by the vehicle sitting a long time and the ghost loads
dropping the battery voltage to 10V and had to recharge externall
11 matches
Mail list logo
