Battery Management System (BMS)
The battery management system monitors and protects the high-voltage battery.
What is Battery Management System (BMS)?
It measures cell voltages, temperatures and current. It balances cells, controls cooling and heating, and limits charge and discharge power. It reports faults and stores data about battery health. When cells drift apart in voltage, the BMS balances them so the weakest cell does not limit the whole pack. Contactors in the battery are opened by the BMS when the car is switched off or a fault is detected.
How it works
Sensors in the battery feed the BMS, which sends limits to the rest of the car.
Why it matters for your car
BMS faults can limit power or stop charging. Software updates sometimes improve battery behaviour.
Other terms
- Camshaft
- Coil Spring Compressor
- Compression Test
- Control Unit Coding
- Door Hinge
- Drive Shaft (Half Shaft)
- Electric Current (Amperage)
- Fuel Rail
- Fuse Box
- Headlight Washer
- MacPherson Strut
- Radiator Stop Leak
- Side Window
- Silicon Carbide (SiC) Inverter
- Stratified Charge Combustion
- Swirl Flaps
- Toe (Alignment)
- Traction Motor
- Tread Wear Pattern
- Tyre Changer (Tyre Fitting Machine)