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Summary

  • The electric car battery is a large, flat, rectangular box underneath the floor of the electric vehicle.

  • This battery powers the EV and charges differently depending on the type of electric car.

  • Always wear protective gear and disable the EV before accessing the electric car battery.

2021 ford lightning battery pack
A 2021 Ford Lightning battery pack | Image Source: Richard McCuistian

An electric car battery is a large, flat, rectangular box made up of numerous smaller battery cells. It often sits underneath the electric vehicle‘s floor to minimize and balance out the weight. The typical electric car battery pack has roughly the same dimensions as a thick mattress, but it’s much thicker and encased in a protective metal cover.

The electric car battery supplies the power to operate the myriad functions of the electric vehicle (EV). It charges differently depending on the type of electric car. In a plug-in EV, the battery connects to the charging station. In a hybrid, the alternator charges the battery when the engine is running. Finally, if the electric car has regenerative brakes, the battery charges when you hit the brakes.

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There are several types of electric car batteries. Most batteries use lithium-ion technology to store more energy in the same space. In the US, most lithium-ion batteries use a blend of either nickel, manganese, and cobalt (NMC) or nickel, manganese, cobalt, and aluminum (NMCA).

Tips on How to Access the Electric Car Battery

Always put on protective clothing before touching high-voltage parts like the electric car battery. Wear gloves made of insulating material that prevents electricity from flowing through the handwear. The gloves must be thick enough to protect against injuries and sufficiently flexible to let you do fine work.

Disable the EV first before working on the electric car battery. Each EV manufacturer has specific procedures for disconnecting the high-voltage system. Consult your owner’s manual or look for the manufacturer’s official instructions on how to do so. You can also disconnect the 12-volt car battery or auxiliary power to prevent systems from turning on.

About The Authors
Written By Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Reviewed By Technical Reviewer at CarParts.com

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

File Under : Electrical System , Auto Repair , DIY Tagged With : ,
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