Self-adaptive control method for battery management system for electric automobile

Abstract

The invention discloses a self-adaptive control method for a battery management system for an electric automobile. The battery management system comprises a BMS (battery management system) basic module, a self-test module, a control module, and a parameter and decision regulation module, wherein the BMS basic module is used for finishing the basic functions needed by the battery management system; the self-test module is used for detecting the state of a battery at regular time, and executing the control instruction sent by the control module to perform self-test on the battery; the control module is used for judging whether the self-test is performed on the battery according to the state of the battery, and transmitting the real-time state parameter obtained by the test to the parameter and decision regulation module; and the parameter and decision regulation module is used for regulating the balance control decision of the BMS basic module and the estimation model parameter of the state of charge (SOC) of the battery, and realizing self-adaptive control on a battery management process via the self-regulation balance control decision and the estimation model parameter of the SOC of the battery in the whole life cycle of the battery.

Description

technical field [0001] The invention relates to the field of electric vehicle battery control methods, in particular to an adaptive control method for an electric vehicle battery management system. Background technique [0002] With the continuous reduction of available fuel in the world, the continuous rise of fuel prices, and the emission of vehicle exhaust have also caused pollution to the environment in which people live, so people urgently need a product that can replace traditional fuel vehicles. [0003] As an excellent product to replace traditional fuel vehicles, electric vehicles have become a hot spot of scientific research due to their "zero emission" advantages. As the core power component of electric vehicles, the battery life and safety are related to the performance of the vehicle, and the related battery management system plays an extremely important role. [0004] The battery management system (BMS) is the link between the battery and the user, and the mai...

AI Technical Summary

Problems solved by technology

Secondary batteries have the following disadvantages, such as less stored energy, short life, problems in series and parallel use, safety in use, and difficulty in estimating battery power, etc.

The previous relatively mature BMS products basically covered the above functions. However, during the entire battery life cycle, there are large differences in the characteristics of the power battery, which will inevitably cause different life conditions due to the chemical changes of the battery itself. The resulting changes in the total battery capacity, battery internal resistance, etc. will cause the balanced charging and discharging strategy and battery state of charge estimation method in the previous stage of the BMS system to be unable to adapt to the optimal control of the power battery throughout the life cycle.

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