Automatic switching method of battery pack

Abstract

The invention provides an automatic switching method of a battery pack. The automatic switching method of the battery pack relates to a plurality of battery modules, each battery module comprises a battery management system and a switch, and battery units are connected with a circuit bus through the switches. The battery management systems of all the battery modules are connected mutually through data buses, and each battery management system comprises a data collection module collecting battery module information, a data comparison module and a control module. Preset values are set in the data comparison modules, the battery module information collected by the data collection modules is compared with the set preset values, and the control modules control switching off or switching on of the switches according to information of the data comparison modules. After the scheme is adopted, on the premise that a control system of an electric vehicle is not changed, the battery modules are used to supply power jointly, the requirement for consistency among all the modules does not exist, compatibility of the battery pack is improved, and meanwhile, the automatic switching method of the battery pack can avoid overcharging or over-discharging of the battery pack, prolong service life and save costs.

Description

technical field [0001] The invention relates to a battery pack switching method, in particular to an automatic switching method based on battery pack information. Background technique [0002] In recent years, the continuous rise of oil prices has affected the nerves of the world economy. Although the income of many people is enough to afford a gasoline car, the high oil price will greatly increase the daily expenses of car owners, and in serious cases will reduce the cost of car owners. People urgently need a cheap and economical new energy to replace traditional fuel. In the past few years, electric vehicles were only a concept, but after just a few years of development, some key technologies of power batteries have been broken through, and the safety performance, cycle life, and energy density of power batteries that people have criticized have been greatly improved. , the electric car, a means of transportation that completely gets rid of oil dependence, has quietly com...

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