Electric vehicles employ battery management systems (BMS) to monitor and regulate the charging and draining of rechargeable batteries, which increases efficiency. Battery management technology keeps the battery secure, dependable, and senile without going into a destructive state. Different monitoring approaches are employed to maintain the batterys level of charge, including voltage, current, and ambient temperature. Different analog/digital sensors with microcontrollers are utilised for monitoring purposes. This work discusses a batterys maximum capacity as well as its state of charge, health, and longevity. Reviewing all of these approaches can help identify potential problems in the future and remedies.