Method using vehicle controller for battery management of electric vehicle

Abstract

The invention discloses a method using a vehicle controller for battery management of an electric vehicle, the vehicle controller performs, from the point of vehicle control, all-sided comprehensive operation processing according to the vehicle state, and according to the to-be-realized function demands of a vehicle on a running battery pack, performs corresponding function strategy and algorithm processing on the battery pack; the vehicle controller sends operation results to a battery management system, the battery management system executes commands of the vehicle controller and feeds back the executed results to the vehicle controller; the vehicle controller analyzes the fed-back results to determine whether to continue a battery management procedure, and if necessary, the vehicle controller continues issuing execution commands to a battery management system load; and after the battery management system and the load both complete the execution commands, the procedure is over, and the vehicle controller quits the procedure. According to the method, control functions of the battery pack are integrated in the vehicle controller, the vehicle controller controls from the point of vehicle, so that the vehicle running is more smoothly and comfortable.

Description

technical field [0001] The invention relates to battery management, in particular to a method for managing electric vehicle batteries with a vehicle controller. Background technique [0002] The battery management system is responsible for the strategies and algorithms of various functions of the battery pack, strategy execution, signal sampling and measurement, battery state estimation, sampling and analysis and processing of fault information. The battery pack information sampling and measurement part, such as monomer voltage detection, battery temperature detection, total voltage detection, current detection, insulation resistance detection; battery state estimation part, such as remaining power SOC, battery health status SOH, charging power, discharging power, The maximum voltage difference of battery cells, the maximum temperature difference of battery packs, etc.; strategy algorithms and execution parts, such as high voltage output control, battery balancing function, ...

AI Technical Summary

Problems solved by technology

[0003] At present, the battery pack of electric vehicles is controlled by the battery management system. The vehicle controller and the battery management system only exchange data, and the vehicle controller cannot perform battery control. In this way, the battery management system may not fully understand the vehicle. demand, the battery system cannot make corresponding actions well

Moreover, the demand of the whole vehicle changes frequently, which brings certain difficulties to the development of the battery management system, and the vehicle controllers of different OEMs will use different battery management systems to cooperate with it, resulting in poor consistency of the battery management system, which is not conducive to industrialization

For the needs of the whole vehicle, the car factory needs to communicate frequently with the battery management system manufacturer, and this kind of demand for the whole vehicle is constantly emerging with the development of the whole vehicle, which brings great difficulties to the development of the battery management system

Different models have different requirements in different periods, and the corresponding battery management systems are different, resulting in more versions of battery management systems

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