BMS

How it is used

Used by battery and software engineers and EV technicians. The BMS estimates state of charge and state of health, limits charging and discharging power, and stores fault codes that a scan tool can read.

Example sentences

1. The BMS reduced charging power because the cell temperatures were too low.

2. A BMS software update improved the accuracy of the range estimate.

Common collocations

• BMS software
• BMS fault
• cell balancing
• BMS calibration

Related terms

• battery packThe large high-voltage battery that stores energy for an electric or hybrid vehicle. It is made of many cells grouped into modules, with cooling and control electronics in one housing.
• battery cellThe smallest electrochemical unit of a battery. Many cells are connected into modules and packs; the main formats are cylindrical, prismatic and pouch cells.
• state of chargeHow full a battery is at a given moment, shown as a percentage of its usable capacity. The battery management system estimates it continuously.
• thermal runawayA dangerous chain reaction in a lithium-ion cell in which rising temperature causes reactions that release even more heat, which can lead to fire, toxic gases and spread to neighboring cells.
• ECUShort for electronic control unit (or engine control unit): a small computer that reads sensors and controls actuators, for example injection timing in an engine. Modern cars have dozens of them.

More terms: Electric Vehicles and Batteries

• electric vehicle
• charging station
• regenerative braking
• driving range
• traction motor
• inverter
• hybrid vehicle
• plug-in hybrid
• DC fast charging