Power supply system of battery management system

Abstract

The invention provides a power supply system of a battery management system, comprising a battery pack, a first protection module, a voltage conversion module, a second protection module and a battery management system; the battery management system includes a main control module, an insulation detection module and a collection module; the battery The package is connected to the voltage conversion module through the first protection module, and the voltage conversion module is connected to the battery management system through the second protection module; the high voltage output from the battery pack is transmitted to the voltage conversion module through the protection of the first protection module, and the voltage conversion module converts the The high-voltage electricity is converted into low-voltage electricity and transmitted to the battery management system through the protection of the second protection module. The low-voltage electricity is used to supply power to the main control module, the insulation detection module and multiple acquisition modules; the acquisition module is used to collect battery pack information, and the insulation The detection module is used to detect the insulation state of the battery pack, and the main control module is used to control the operation of the battery pack according to the information of the battery pack collected by the acquisition module and the insulation state of the battery pack detected by the insulation detection module.

Description

【Technical field】 [0001] The invention relates to the technical field of electric vehicles, in particular to a power supply system of a battery management system. 【Background technique】 [0002] The battery is the core of electric vehicles, and it is also a comprehensive embodiment of automotive engineering and power engineering technology, while BMS (BATTERY MANAGEMENT SYSTEM, battery management system) is the link between batteries and electric vehicles. The main function of the BMS is to improve the utilization rate of the battery, prevent the battery from overcharging and over-discharging, prolong the service life of the battery, and monitor the state of the battery. Therefore, the BMS needs to be kept powered on regardless of whether the battery is charging or discharging. However, there are many problems in the power supply of BMS at present. For example, the power of charging piles cannot meet the power supply requirements of BMS. Using the low-voltage power supply of...

AI Technical Summary

Problems solved by technology

However, there are many problems in the power supply of BMS at present. For example, the power of charging piles cannot meet the power supply requirements of BMS. Using the low-voltage power supply of electric vehicles to supply power will excessively consume the energy of low-voltage power supplies, which will affect the power supply of other low-voltage systems on electric vehicles.

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