Motive power battery box with balanced heat radiation structure

Abstract

The invention discloses a motive power battery box with a balanced heat radiation structure. One end of a framework (18) is provided with an air inlet plate (12), gaps (19) are formed among connecting plates (9) longitudinally distributed at the upper part of the framework (18), an air guide plate (5) is positioned between the connecting plates (9) and a bottom plate (20), after the air guide plate (5) is upwards inclined, an included angle is formed between the air guide plate (5) and the upper part of the framework (18), an air guide groove is formed, an outer cover (2) is fixedly arranged on a bottom disc (1), a plurality of battery modules distributed in the outer cover (2) are arranged on the bottom disc (1), air inlets distributed in the air inlet plate (12) are communicated with a heat radiation air passage (21) arranged in the middle of each battery module in the outer cover (2) through the gaps formed between the air guide groove and the connecting plates (9), one side of the top of the outer cover (2) adjacent to an air outlet plate (4) is provided with an air outlet (22), the air outlet (22) is communicated with the inside of the outer cover (2), and an exhaust fan (6) is arranged at the air outlet (22) part.

Description

technical field [0001] The invention relates to a power battery box with a balanced heat dissipation structure. Background technique [0002] The maximum current of high-energy power batteries used in hybrid vehicles is about 200A in actual road operation applications. Frequent charging and discharging during driving will generate huge heat. If the heat accumulated in the battery box cannot be dissipated in time, it will It causes the temperature of the battery to rise, and the temperature has a great impact on the performance of the battery, such as power and energy characteristics, working condition efficiency and charging acceptance, safety and reliability of the electrochemical system, service life, etc. Not only that, it may cause power failure in severe cases. The thermal runaway of the system will endanger the safety of the vehicle and passengers. Therefore, the battery box must be forced to ventilate and dissipate heat. [0003] In the same battery box, if the heat...

AI Technical Summary

Problems solved by technology

[0003] In the same battery box, if the heat dissipation of the batteries is uneven, it will cause uneven temperature among different individual batteries, which will cause individual batteries to be charged and discharged in a high-temperature environment for a long time, and their energy will be consumed rapidly, causing individual batteries to fail early, thus The service life of the entire power system is shortened, and in severe cases, it may cause the failure of individual batteries or even the risk of fire and explosion. Therefore, to dissipate heat from the battery box, it is necessary to ensure that the temperature of each single battery is basically the same

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