Intelligent management system of electric automobile lead-acid battery

Abstract

The invention relates to an intelligent management system of an electric automobile lead-acid battery. The intelligent management system comprises a central processing unit, a sampling module, a CAN (Controller Area Network) communication module and a control module, wherein the central processing unit is used for collecting a sampling signal of the sampling module to carry out calculation, monitoring battery and system states in real time, transmitting the received signal and a calculation result to the CAN communication module in real time and outputting the calculation result to the control module; the sampling module is used for sampling voltage, temperatures and current signals of the lead-acid battery; the CAN communication module is in communication connection with a charger and a whole vehicle system through a CAN bus; and the central processing unit is respectively connected with the sampling module, the CAN communication module and the control module in a communication manner. The intelligent management system of the electric automobile lead-acid battery effectively solves the management and maintenance problems of the lead-acid battery and can accurately estimate a battery state through detecting analog quantities including the voltage, current, the temperatures and the like of the lead-acid battery, so that the battery can be effectively protected, the ageing of the battery is delayed, and the service life of the battery is sufficiently prolonged.

Description

technical field [0001] The invention relates to a battery management system, in particular to an intelligent management system for lead-acid batteries of electric vehicles, which is suitable for the management and protection of lead-acid power batteries of pure electric vehicles. Background technique [0002] For pure electric vehicles, power batteries and their management are the key core technologies. The battery management system is responsible for the collection of power battery voltage, temperature and charge and discharge current, high and low voltage relay control, SOC and SOH calculation, battery system monitoring and fault diagnosis, battery cell balance management, etc., which are indispensable in the vehicle control strategy. missing part. [0003] The development of lead-acid battery technology has been very mature so far. It is cheap, safe and reliable, and can output large current and power. It is suitable for pure electric vehicles. However, as the batte...

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Problems solved by technology

[0004] At present, lead-acid batteries are used as power batteries, and most of them do not include management systems. Even if there are some, the estimation of SOC and SOH is not very accurate.

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