Explosion-proof structure and power battery adopting explosion-proof structure
An explosion-proof structure, power battery technology, applied in the direction of structural parts, battery pack components, circuits, etc., can solve the impact of assembly errors or cumulative errors on the explosion-proof performance of explosion-proof valves, explosion-proof valves that cannot start and discharge batteries in time, assembly errors in explosion-proof performance or Accumulative error and other problems, to achieve the effect of simplifying the installation process, simple structure, and reducing production and installation costs
Active Publication Date: 2012-11-21
BYD CO LTD
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Problems solved by technology
The structure of traditional explosion-proof valve is cumbersome, the process is complicated, the cost is high, and because of its many parts, the assembly process is complicated, the explosion-proof performance of the explosion-proof valve is easily affected by the assembly error or cumulative error in the assembly process, which leads to the traditional explosion-proof valve. The explosion-proof performance is unreliable. When the battery is abnormal, the explosion-proof valve often cannot be activated in time to discharge the internal air pressure of the battery.
In addition, due to the cumbersome structure of the traditional explosion-proof valve, the explosion-proof performance is easily affected by the assembly error or cumulative error in the assembly process, and the consistency of its explosion-proof performance is also difficult to guarantee. is a very important security issue
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[0013] The present invention will be further described below in conjunction with the accompanying drawings.
[0014] Such as Figure 1-3 As shown, the explosion-proof structure includes a protective cap 3 , an explosion-proof membrane 4 and an opening 5 , wherein a plurality of exhaust holes 7 are arranged on the body of the protective cap 3 . The wall thickness of the protective cap 3 is 0.1-0.3mm, and the thickness of the explosion-proof membrane 4 is 0.01-0.05mm. The materials of the protective cap 3 and the explosion-proof membrane 4 are all the same as the cover plate 1, which are easily weldable metals such as aluminum, aluminum alloy or steel. Explosion-proof membrane 4 and the brim edge shape of protective cap 3 are consistent, are circular. The protective cap 3 is stacked on the explosion-proof membrane 4, and placed together in the placement groove 2 on the cover plate 1, and welded on the cover plate 1 as a whole by a high-energy beam such as a laser or an electro...
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The invention discloses an explosion-proof structure for a power battery and aims to provide an explosion-proof structure for a power battery with relatively simple structure and reliable explosion-proof performance. The explosion-proof structure comprises an exhaust outlet (5) which is formed on a cover plate (1) or a shell of the power battery and an explosion-proof film (4) which is fixed on the air exhausting opening (5). The explosion-proof structure is characterized in that the explosion-proof structure also comprises a protective cap (3), the cap body of the protective cap (3) is provided with an exhaust hole (7), and the protective cap (3) is overlaid on the explosion-proof film (4) and fixed on the air exhausting opening (5). The invention also discloses the power battery adopting the explosion-proof structure. The explosion-proof structure is mainly used for preventing the power battery from exploding caused by increased inner pressure in unexpected situations.
Description
technical field [0001] The invention relates to an explosion-proof structure of a power battery. In addition, the present invention also relates to a power battery adopting the explosion-proof structure. Background technique [0002] Due to the advantages of light weight, small size, large capacity, high power, and no pollution, power batteries have become ideal power sources for portable electronic devices and electric vehicles. However, when the battery is abnormal, a large amount of gas will be generated inside the battery, causing the internal pressure of the battery to increase sharply. At this time, if the large amount of gas generated cannot be removed in time, the battery will explode and cause a safety accident. [0003] In order to avoid explosions, an explosion-proof structure is generally added to the structure of the battery. For smaller batteries, an aluminum shell is generally used as the battery shell, and its thickness is not too thick. Usually, indentatio...
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IPC IPC(8): H01M2/12H01M50/342
CPCY02E60/12Y02T10/7005Y02T10/7011Y02E60/10
Inventor 赵维赖庆朱建华
Owner BYD CO LTD