Battery management system adopting double-buses of energy and data

Abstract

The invention discloses a battery management system adopting double-buses of energy and data The battery management system adopting double-buses of energy and data comprises a master controller and a plurality of single-chip microcomputers used for energy balance controlling, wherein the single-chip microcomputers are connected with energy balance driver modules. The battery management system further comprises energy buses used as energy transfer storages in the process of energy balancing between single batteries. The master controller is provided with data buses, and each of the single-chip microcomputers is connected with the master controller through the data buses. The aim of the battery management system adopting double-buses of energy and data is that with the energy buses as energy transfers of all the single batteries in the process of energy balancing, a point to point balance between any two single batteries inside the battery box is realized, meanwhile, the master controller is connected with each of controlling devices through the data buses so that the data transmission of the battery management system is achieved, therefore, the whole battery box is capable of only using one master controller to accurately realize the point to point balance of single batteries, thereby improving the balancing speed and saving the cost of the balancing controller.

Description

[technical field] [0001] The invention relates to the field of electric vehicle power lithium battery management systems, in particular to a battery management system using dual buses of energy and data. [Background technique] [0002] At present, the lithium batteries used in electric vehicles are powered by a battery pack composed of multiple cells connected in series, and the battery box is generally composed of multiple battery packs. The structure of the existing battery management system generally needs to be designed according to the actual situation due to the different technical means used. It is troublesome to change after the design is installed. The battery management system does not have a dual bus structure of energy and data. It does not have a unified access Standard and good technical solutions, if you want to add a new battery pack and energy balance module on the original basis, it will be troublesome, you need to add all the unit circuits of the energy ba...

AI Technical Summary

Problems solved by technology

The structure of the existing battery management system generally needs to be designed according to the actual situation due to the different technical means used. It is troublesome to change after the design is installed. The battery management system does not have a dual bus structure of energy and data. It does not have a unified access Standard and good technical solutions, if you want to add a new battery pack and energy balance module on the original basis, it will be troublesome, you need to add all the unit circuits of the energy balance module and arrange its connection circuit with the controller, and even adjust the energy The connection relationship and control process between equalizing modules is not convenient for practical application, and in the existing technical solutions, energy equalization can generally only balance the single cells in the same battery pack, or the single cells in the battery pack Generally, energy balance between adjacent single cells can be carried out in bulk battery balancing. There is no simple technical solution to directly realize energy balance between any two points, which makes the equalization speed relatively low, and with the increase of the number of single cells, the overall circuit more and more complicated

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