Lithium battery thermal safety management system and management and control method

Abstract

The invention discloses a lithium battery thermal safety management system and a management and control method. The lithium battery thermal safety management system comprises a water pump, a thermal safety management system, a battery management system, an energy storage converter, an in-box main monitor, a plurality of battery modules and a cooling-water machine; a liquid cooling channel is laidon the surface of a battery module; the water pump is communicated with the cooling-water machine through a liquid cooling channel to form a closed loop, an electromagnetic proportional valve is arranged on the liquid cooling channel, and the battery module comprises a plurality of single batteries; the thermal safety management system comprises a data transmission module, a data recording module,a data analysis and calculation module and a control execution module; the invention further provides a lithium battery thermal safety management and control method adopting the lithium battery thermal safety management system, the heat generation difference of the lithium battery caused by different aging degrees in the service process can be identified, and heat dissipation can be regulated andcontrolled as required, so that the consistency and the running performance of the running temperature of the battery are improved.

Description

technical field [0001] The invention relates to the technical field of battery safety management and control, in particular to a lithium battery heat-safety management system and control method. Background technique [0002] Lithium-ion batteries need to be charged and discharged at a suitable working temperature. Since the battery cells will generate heat during charging and discharging, if the heat cannot be dissipated in time, the battery temperature will be too high. Excessively high operating temperature may cause battery performance degradation, life attenuation and other problems. On the other hand, if there is a long-term difference in operating temperature between cells, it will cause inconsistent attenuation of battery capacity and performance, and reduce the overall performance of the battery system. In addition, safety is the core issue in the use of lithium batteries. When the battery is damaged due to its own defects and external abuse problems such as short c...

AI Technical Summary

Problems solved by technology

Excessively high operating temperature may cause battery performance degradation, life attenuation and other problems

On the other hand, if there is a long-term difference in operating temperature between cells, it will cause inconsistent attenuation of battery capacity and performance, and reduce the overall performance of the battery system.

In addition, safety is the core issue in the use of lithium batteries. When the battery is damaged due to its own defects and external abuse problems such as short circuit and overheating, it will trigger side reactions of battery materials and gradually generate a large amount of heat, which will cause thermal runaway and cause the battery to spontaneously ignite and explode. and other security issues

[0003] The lithium battery thermal and safety management system in the prior art uses the same liquid cooling channel to carry out thermal management strategies for all power modules in a group, and does not consider the heating and / or cooling requirements of each individual battery module. Even if there is a problem with the single battery, cooling cannot be strengthened in a timely and effective manner to eliminate or reduce the risk of thermal runaway and its spread

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