Battery pack

How it is used

Engineers talk about pack capacity in kWh, pack voltage (often 400 V or 800 V) and pack cooling. Only trained technicians may open or replace a battery pack, after the high-voltage system has been safely isolated.

Example sentences

1. The battery pack has a usable capacity of 77 kWh.

2. A damaged battery pack must be stored outside, away from other vehicles.

Common collocations

• high-voltage battery pack
• battery pack cooling
• replace the battery pack
• pack capacity

Related terms

• 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.
• BMSShort for battery management system: the electronics that monitor the voltage, current and temperature of the cells, keep them balanced and protect the battery from overcharging, deep discharge and overheating.
• 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.
• electric vehicleA vehicle driven only by one or more electric motors that take energy from a rechargeable battery. It has no fuel tank and produces no exhaust emissions while driving.

More terms: Electric Vehicles and Batteries

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