Battery Management System with Power Control

Abstract

The invention discloses a battery management system (BMS) with a power supply control function. The battery management system comprises an assisted power supply, a BMS power supply control module and a BMS functional module, wherein the BMS power supply control module comprises a main switch connected with the assisted power supply and the BMS functional module, a voltage detection and protection module for detecting the voltage of the assisted power supply and outputting a signal to control the main switch, a logical switch for receiving signals from the assisted power supply and BMS functional module and outputting a control signal to the voltage detection and protection module and a key switch connected with the assisted power supply, the logical switch and the BMS functional module. By the adoption of the battery management system, power supply control functions that the overvoltage-undervoltage detection and detection is carried out on the BMS power supply, a self-locked power supply is actively controlled after electrification, system safe detection and data storage are completed before the system is powered when a power switch is turned off are achieved, thereby effectively improving the reliability of the battery management system.

Description

technical field [0001] The invention relates to the field of a vehicle battery management system, in particular to a battery management system with power supply control. Background technique [0002] As an important part of the automotive energy system, the battery management system (BMS) is mainly to optimize battery performance, improve battery utilization, prevent battery overcharge and overdischarge, prolong battery life, monitor battery status and The car provides functions such as accurate battery information, and its performance directly affects the overall performance of the car. [0003] When the battery management system is connected to the power supply and enters the working state, it needs to process various data, including historical data of battery operation, SOC data, etc. If there is a problem with the connected power supply voltage or the system is powered off, a certain historical record of the battery management system will Loss may cause SOC estimation e...

AI Technical Summary

Problems solved by technology

[0005] 1. The power supply of the BMS is directly controlled by the key and does not have an automatic control function. When the key is misoperated or the timing of the action is wrong, the data will be lost.

[0006] 2. Some BMS controllers are powered by rechargeable batteries. After the system is powered off, the controller can still work for a period of time, but the rechargeable batteries have a limited life. If the battery fails, data will be lost

[0007] 3. Sometimes the BMS needs to control the power supply of the car's power battery. If the power supply of the BMS is accidentally disconnected during the operation of the car, it will directly lead to a sudden interruption of the power supply, which will shorten the life of the contactor, or even burn it directly, and damage the motor controller. as a result of

[0008] These problems have seriously affected the performance and safety of electric vehicles

However, there is still no effective solution for BMS power control

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