BMS slave control module monomer voltage automatic calibration system and method

Abstract

The invention discloses a BMS slave control module monomer voltage automatic calibration system and method, and relates to the technical field of BMS slave control module monomer voltage testing. The calibration system comprises a test fixture; a standard sample; an upper computer; a monomer voltage simulation module electrically connected with the standard sample piece and the upper computer; wherein the upper computer is used for calculating calibration parameters of the analog monomer voltage according to the given voltage of the monomer voltage simulation module and the feedback voltage of the standard sample piece and storing the calibration parameters, and the upper computer is also used for calling the calibration parameters and controlling the monomer voltage simulation module to output the analog monomer voltage corresponding to the calibration parameters, and comparing the analog monomer voltage with a feedback voltage fed back by the BMS slave control module to be tested so as to detect the monomer voltage of the BMS slave control module to be tested. The calibration system has the advantage that the precision and the consistency of the BMS slave control module monomer voltage test can be ensured.

Description

technical field [0001] The invention relates to the technical field of BMS slave control module monomer voltage testing, in particular to a BMS slave control module monomer voltage automatic calibration system and method. Background technique [0002] The battery management system (BATTERY MANAGEMENT SYSTEM, referred to as BMS) is an important part of electric vehicles. One of the key technologies is to monitor the voltage of the battery pack. The BMS adjusts the corresponding control strategy according to the collected voltage value, thereby improving the battery life. The safety of the car and the increase of the cruising range of the car, so the functional detection of the single voltage acquisition of the BMS slave control module is particularly important in the production stage. However, due to cost and various factors, it is not convenient to use the actual battery pack for testing. It is necessary to use a high-precision simulation module to simulate the cell voltage ...

AI Technical Summary

Problems solved by technology

[0002] The battery management system (BATTERY MANAGEMENT SYSTEM, referred to as BMS) is an important part of electric vehicles. One of the key technologies is to monitor the voltage of the battery pack. The BMS adjusts the corresponding control strategy according to the collected voltage value, thereby improving the battery life. The safety of the car and the increase of the cruising range of the car, so the functional detection of the single voltage acquisition of the BMS slave control module is particularly important in the production stage. However, due to cost and various factors, it is not convenient to use the actual battery pack for testing. It is necessary to use a high-precision simulation module to simulate the cell voltage of the battery pack

[0003] In order to test the acquisition accuracy of the battery management system, it is first necessary to ensure the accuracy of the cell voltage output by the simulation module. However, due to the influence of the environment, temperature and line disturbance, it is difficult to guarantee the accuracy of the cell voltage at the product end. Existing test equipment The method adopted is to compensate the output voltage of the simulation module in real time by judging the product collection voltage value during the test, which will cause the product to have the same collection voltage, but the input voltage of different products is different, and the consistency of its products cannot be guaranteed.

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