This design focuses on e-bike or e-scooter battery pack applications and is also suitable for other high-cell applications, such as a mowing robot battery pack, 48-V family energy storage system battery packs, and so forth. It contains both primary and secondary protections to ensure safe use of the battery pack.
In summary, the battery management system circuit diagram is a complex arrangement of voltage and current sensors, temperature sensors, control circuits, and switches that work together to monitor and protect the battery. It is crucial for maintaining the safety, efficiency, and longevity of the battery-powered system.
Fig. 1 is a block diagram of circuitry in a typical Li-ion battery pack. It shows an example of a safety protection circuit for the Li-ion cells and a gas gauge (capacity measuring device). The safety circuitry includes a Li-ion protector that controls back-to-back FET switches. These switches can be
It contains both primary and secondary protections to ensure safe use of the battery pack. The primary protection protects the battery pack against all unusual situations, including: cell overvoltage, cell undervoltage, overtemperature, overcurrent in charge and discharge, and short-circuit discharge.
A structural battery pack is designed to become a structural component of the EV. This approach can reduce the EV’s weight by removing duplicate structures between the pack and the vehicle structure, as the battery pack becomes part of the vehicle structure. This design can improve the EV’s overall performance and efficiency.
Enhancing the battery integration efficiency from cell to pack is an effective avenue to boost battery energy density in the pack level. The conventional CMP pattern only realizes ∼60%, indicating the significant mass and volume portion of auxiliary parts in the entire battery system [2, 10].