Method and system for automatically offline calculating the working precision of battery management system

Abstract

The invention relates to a method and system for automatically offline calculating the working precision of a battery management system wherein the method comprises the following steps: controlling the working of a vehicle component simulation module by an entire vehicle controller which sends to the battery management system a working instruction at a generated measurement time t and reads the prediction parameters wherein when the working instruction is fulfilled, the vehicle component simulation module stops working; reading the working parameters; calculating the SOP measurement precision [Epsilon] SOP of the battery management system; determining whether the temperature of a battery pack exceeds a temperature threshold or not; if the answer is yes, controlling a heat management module to work and return to the determination; if the answer is no, reading the stabilizing parameters and calculating the SOC measurement precision [Epsilon] SOC of the battery management system. The apparatus comprises an entire vehicle controller in connection with the battery management system and a vehicle component simulation module and a heat management module both in connection with the battery pack and the entire vehicle controller. Compared with the prior art, the calculation result of the invention is accurate, can be conveniently achieved and meets actual conditions.

Description

technical field [0001] The invention relates to the field of automobile batteries, in particular to a method and device for automatically off-line calculating the working accuracy of a battery management system. Background technique [0002] There are many high-voltage electrical components in electric vehicles, such as high-voltage battery packs, high-voltage junction boxes, motor controllers, air-conditioning controllers, DC / DC, chargers, etc. The power battery is one of the most critical components. How to effectively and accurately estimate battery SOC (state of charge, power storage level) and SOP (state of power, charging and discharging power capability), to ensure that the battery does not exceed the allowable value of battery voltage, current and temperature while meeting the vehicle power requirements, Ensuring battery life is of great significance. [0003] The existing battery management system BMS can estimate the SOC and SOP of the car battery pack. However, ...

AI Technical Summary

Problems solved by technology

This method is time-consuming and labor-intensive, and requires the actual operation of the vehicle to complete the calculation, and because the actual operation of the vehicle requires manual operations, there are inaccuracies, so the desired conclusion may not be obtained

[0004] Patent CN201010102766.2 provides a battery pack management system test platform, which simulates battery parameters through a battery voltage simulator and a current constant current source. Although this method can meet the requirements of automatic detection, this method mainly uses Simulate the battery of the car to calculate the working accuracy of the BMS. However, the working conditions of the car battery are uncontrollable and unpredictable. This platform cannot guarantee the accurate simulation of the battery, so it can only meet the test in the laboratory. demand, not applicable in industrial production

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