The 2017 Volt uses two battery systems: a high‑voltage lithium‑ion propulsion pack (18.4 kWh) and a standard 12‑volt auxiliary battery for electronics and starting power.
High-voltage propulsion battery
The main energy source for electric driving is a high‑voltage lithium‑ion battery pack. Here are the key details:
- Type: Lithium-ion battery pack
- Capacity: 18.4 kWh
- Chemistry: Nickel–manganese–cobalt oxide (NMC) chemistry
- Supplier: LG Chem
- Configuration: integrated under the vehicle with a dedicated thermal management system
In short, this is the core energy source that powers the Volt in electric mode and is rechargeable via plug‑in charging and regenerative braking.
Chemistry and cells
The 18.4 kWh pack uses lithium‑ion chemistry commonly described as NMC (nickel‑manganese‑cobalt oxide) cells supplied by LG Chem. The system is actively cooled/heated to maintain performance and longevity and is designed for regular plug‑in charging as well as regeneration from braking.
Auxiliary 12‑volt battery
In parallel with the high‑voltage pack, the Volt operates a conventional 12‑volt battery to run standard car electronics, lights, and the starting process when needed. Details follow:
- Type: 12‑volt lead‑acid battery (VRLA)
- Purpose: powers accessories, lighting, and vehicle electronics when the high‑voltage system isn’t supplying power
- Location: typically located in the engine compartment
- Charge mechanism: recharged by the vehicle’s DC‑DC converter from the high‑voltage battery
The 12‑volt system operates independently from the main propulsion battery but is kept charged through the car’s electrical architecture, ensuring reliable startup and accessory operation.
Summary
For a 2017 Chevy Volt, the essential answer is that two batteries power the car: a high‑voltage 18.4 kWh lithium‑ion propulsion pack (NMC chemistry) supplied by LG Chem, and a conventional 12‑volt lead‑acid auxiliary battery that handles electronics and startup. Together, they enable electric driving, plug‑in charging, and regular vehicle operation.