A battery management system suitable for low temperature operation

Abstract

The invention discloses a battery management system suitable for low-temperature operation, which includes a detection and control module, a charging and adjustment module, a subgroup hardware module and a protection module. The data signal of the module is analyzed by the control unit in the inspection and control module and compared with the preset data value. After the detection data is analyzed, the sub-group hardware module is driven to work through electrical signals, and the data information and execution process are packaged into log files and sent to the control unit. The control unit realizes data communication through the TTL interface provided by the single-chip microcomputer. The comprehensive detection and circuit interference, and the sub-group hardware module realize the effective heating and heat preservation of the battery, so that the battery can maintain a good working condition.

Description

technical field [0001] The invention relates to the technical field of battery management systems, in particular to a battery management system suitable for low temperature work. Background technique [0002] With the dual advantages of low energy consumption and zero emissions, electric vehicles are gradually replacing traditional fuel vehicles as the main means of transportation. Compared with fuel vehicles, electric vehicles can reduce greenhouse gas emissions by 20%. Among the emissions generated by providing electric energy, CO 2 , CO, NO x The emissions are 76%, 2% and 56% of the emissions of fuel vehicles respectively. The power of electric vehicles is provided by the discharge of the on-board power battery. This will lead to thermal runaway, and even cause the battery to explode in severe cases; in low temperature environments, due to the increase in the viscosity of the electrolyte, it will hinder the movement of the charge carrier and affect the current generation...

AI Technical Summary

Problems solved by technology

[0002] With the dual advantages of low energy consumption and zero emissions, electric vehicles are gradually replacing traditional fuel vehicles as the main means of transportation. Compared with fuel vehicles, electric vehicles can reduce greenhouse gas emissions by 20%. Among the emissions generated by providing electric energy, CO 2 , CO, NO x The emissions are 76%, 2% and 56% of the emissions of fuel vehicles respectively. The power of electric vehicles is provided by the discharge of the on-board power battery. This will lead to thermal runaway, and even cause the battery to explode in severe cases; in low temperature environments, due to the increase in the viscosity of the electrolyte, it will hinder the movement of the charge carrier and affect the current generation. In extreme cases, the electrolyte will even freeze, causing the battery to fail to discharge The electric vehicle cannot be started. Therefore, in order to ensure the normal output power of the battery and prolong the cycle life of the battery, thermal management of the battery must be carried out to maintain the normal operating temperature of the battery and improve the overall performance of the electric vehicle in a low temperature environment;

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