Battery management system

Abstract

The invention relates to a battery management system. The battery management system comprises a CPU, a battery temperature collection unit, a battery voltage collection unit, a battery current collection unit, a battery protection unit, a heat management control unit, a module voltage collection unit and an electronic switch unit, wherein the battery temperature collection unit, the battery voltage collection unit and the battery current collection unit are connected with the CPU and a battery pack respectively; the battery pack is connected with the module voltage collection unit through the electronic switch unit; the module voltage collection unit is connected with the CPU; the CPU is connected with the heat management control unit and the battery protection unit respectively; and the battery protection unit is connected with the battery pack. The battery management system also comprises a wireless communication module, an alarm unit and a CAN communication interface connected with the end of a PC. The battery management system can monitor the working condition of batteries, calculates the SOC (State of Charge) of the battery pack, and avoids overdischarge, overcharge and overheat, so that the storage capacity and cycle life of the batteries are utilized to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of managing batteries in a power supply and distribution system, in particular to a battery management system. Background technique [0002] The DC system is an important supporting system for power plants and substations. As a key component, the battery is used when the power grid fails or there is no AC power. After the failure of the battery pack, if manual maintenance is performed, due to the large number of batteries and different conditions, the maintenance workload is large, and many factors cannot be judged, which will directly affect the accuracy and timeliness of troubleshooting. Therefore, the system is generally designed to perform real-time online monitoring and alarming of the basic parameters of the battery pack (single battery voltage, charge and discharge current, operating temperature, and total voltage), estimate the remaining charge of the battery pack, and diagnose early faults. [0003...

AI Technical Summary

Problems solved by technology

[0003] At the same time, in practical applications, these batteries are often connected in series, so that imbalances will occur during charging and discharging, resulting in some battery capacity loss and short life.

When a cell or several cells in a group of batteries are damaged, battery application customers often cannot judge which cell is faulty, so they can only replace a whole group of batteries, resulting in a lot of waste

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