Battery management system suitable for low-temperature operation

Abstract

The invention discloses a battery management system suitable for low-temperature operation. The battery management system comprises a detection and control module, a charging and adjusting module, anauxiliary hardware module and a protection module, wherein the detection and control module comprises a voltage and current detection module and a temperature sensor assembly used for a storage battery pack; the data analysis of data signals of the detection module are performed through a control unit in the detection and control module and the data signals are compared with preset data values; the control unit transmits compared execution signals to an equalization circuit module in the charging and adjusting module; after analyzing detection data of the temperature sensor assembly, the control unit drives the operation of the auxiliary hardware module through electric signals; data information and an execution process are packed into a log file and the log file is sent to the control unit; and the control unit realizes data communication through a TTL transform interface provided by a single-chip microcomputer. The effective heating for heat preservation of the storage battery is achieved by virtue of the comprehensive detection and circuit interference of the charging and discharging process of the storage battery and by virtue of the auxiliary hardware module, so that the storage battery is maintained in a good operation 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 operation. 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 electricity, CO 2 , CO, NO x The emissions are respectively 76%, 2% and 56% of the emissions of fuel vehicles. The power of electric vehicles is provided by the discharge of the on-board power battery. The performance of the power battery is restricted by its operating temperature. The battery temperature will be too high when the battery works in a high temperature environment. This leads to thermal runaway, which may even cause the battery to explode in severe case...

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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