Recharging My Car's Lithium Battery.

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Introduction: Recharging My Car's Lithium Battery.

About: Update 12 September 2017: A very special thanks to Sam Elder, a manager here at Instructables, who tracked down the cause of my lost publications and fixed the issue. Take a bow Sam!

Yes my car's SLI battery is tiny. It's a Lithium iron phosphate battery that I have in service since 2013. I decided to pull the battery and recharge then store it. I will put the replacement (or standby) battery as in the pic, into the car. Notice the condensation on the case. I store my lifepo4 batteries in the fridge since that's the best storage temperature for them and they are non toxic.

This is the only battery wired into my car's electrical system. In other words there is no lead acid battery under the hood or anywhere else in my car.

Step 1: The In-service Battery.

I actually have the battery in the glove box. Removing the stuff I store there, you can see the humble yet powerful battery.

Lithium iron phosphate batteries do not vent dangerous gases and are not combustible. They are in fact the safest Lithium battery available commercially. They are magnitudes safer than stinking lead acids.

Step 2: Removing the Battery.

I made my Battery a plug in type for easy removal and installation. XT60 connectors I used for the plug and play effect.

A strip of velcro holds the battery to the glove box lid.

Step 3: Putting in the Standby Battery.

The first pic shows the both batteries. The replacement goes into the glove box and is hooked in quickly.

Step 4: Recharging!

Using my little finger I carried the battery into the house. So amazing to have a car battery weighing less than 3lbs. Using my intelligent programmable charger, I recharged and balanced the cells.

Step 5: Storage!

With the battery charged and balanced, I put it into the fridge for proper storage. Again folks, there is no danger is food contamination due to the fact lifepo4 batteries are non toxic!

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    3 Discussions

    The car's alternator main purpose is not for recharging the battery. It is there to supply the electrical power for the car, such as head and tail lights, radio, horn and wipers. Read about the very first autos of the 20th century and see for yourself. The battery was designed to power the engine starter only, yet now it has evolved to power other items, and the alternator can recharge it later. Some hybrids don't have any 12 V DC battery anymore, taking power from the high voltage traction battery and using the smaller electric motor as a "starter" and "generator". These have a DC-DC step-down converter to power the electronics and accessories.But most other hybrids do use a smaller 12 V DC battery to power the system that controls the HV battery.

    1 reply

    All good . What you have not mentioned is whether you have another lead acid under the hood and how this battery is connected into the cars system. Clearly it is not charged by the alternator so whats the alt doing? What sort of car is it? How much current can you pull out instantaneously and how much do they cost and from where. Don't get me wrong I appreciate the post as I am a fan of LiPo's too . Where did you get your info on storage temp and non toxic attributes from?