Heat management system of battery management system, and method

Abstract

The invention relates to a heat management system of a battery management system. The heat management system of the battery management system comprises a heat management system body; the heat management system body comprises an air cooling system and a water cooling system which are arranged in a battery compartment; the air cooling system comprises an air inlet formed in the front face of the battery compartment and an air outlet formed in the rear face of the battery compartment, the air inlet and the air outlet are connected with an air inlet pipe and an air outlet pipe correspondingly, andfans are arranged in the air inlet pipe and the air outlet pipe; and the water cooling system comprises a plurality of box plates arranged in the battery compartment. According to the heat managementsystem, the air cooling system and the water cooling system are synthesized and effectively integrated in the battery compartment, and the space utilization rate is increased; and the heat managementsystem controls the air cooling system and the water cooling system to manage the temperature of the battery compartment, the upper limit of the heat dissipation ability is high, the battery temperature can be effectively controlled to not exceed the limit, and the heat management system is worth vigorously promoting.

Description

technical field [0001] The invention belongs to the technical field of battery management, and in particular relates to a thermal management system of the battery management system. Background technique [0002] Lithium power batteries, the key components of electric vehicles, have defects such as poor material stability, safety problems and unsatisfactory use costs. The most important factor affecting the performance of the power battery is the temperature, so it is necessary to use the battery management system and the thermal management system to manage it reasonably and effectively. [0003] Due to the wide variety of lithium batteries, their optimal operating temperature ranges are also different. For lithium iron phosphate batteries, theoretically, its normal operating temperature range is -10°C to 60°C, but experiments have shown that it cannot drive electric vehicles at low temperatures (below 0°C). Therefore, the temperature control range of lithium batteries for ...

AI Technical Summary

Problems solved by technology

When the battery continues to work at 45 ° C, its cycle life is reduced by about 60%, which is more obvious when charging and discharging at a high rate

[0004] The battery thermal management system in the prior art generally controls the battery temperature by controlling the ventilation fan inside the battery compartment for air cooling and heat dissipation. The upper limit of the thermal management capacity of this method is low, and the problem of battery temperature exceeding the limit may occur.

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