Power lithium battery cap
A lithium battery and power technology, which is applied in the direction of battery cover/end cover, battery pack parts, battery box/outer, etc., can solve the problems of explosion-proof plate falling off, power battery safety impact, etc., and achieve the effect of fast heat dissipation
Pending Publication Date: 2018-05-29
安徽镭腾能源科技有限公司
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Problems solved by technology
For another example, in the design of the explosion-proof disk, when the pressure inside the battery breaks through the explosion-proof disk, the explosion-proof disk will fall off to the outside of the steel shell, causing the steel shell to form a secondary conduction, which will affect the safety of the power battery
Method used
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Embodiment 1
[0028] Such as Figures 1 to 7 As shown, the power lithium battery cap of the present embodiment includes an orifice plate 1, an insulating ring 2, an explosion-proof sheet 3 and a top cover 4 in turn, and the explosion-proof sheet 3 is provided with a raised first boss 31 and connected with the first The aluminum sheet 5 that the boss 31 can contact, the aluminum sheet 5 is located above the orifice plate 1 . This kind of structural setting, because the explosion-proof disk 3 is made of aluminum material, the melting point is low, and the aluminum sheet 5 is also made of aluminum material, the melting point of the two is consistent, and the compatibility between materials is also better than that between different materials. Good, and it is welded on the outside, the heat dissipation is fast, there will be no hot-pressed gas entering the inside of the cap, and there is no internal hot-pressing problem caused by ultrasonic welding, which will cause a large pressure on the expl...
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The invention discloses a power lithium battery cap which sequentially comprises a pore plate, an insulation ring, an anti-explosion piece and a top cover. The power lithium battery cap is characterized in that a first boss and an aluminum sheet capable of making contact with the first boss are arranged on the anti-explosion piece, and the aluminum sheet is located above the pore plate. Due to thestructure arrangement, due to the fact that the anti-explosion piece is made of aluminum materials which are low in melting point, the welding aluminum sheet is also made of aluminum materials, the melting points of the aluminum materials are consistent, and the compatibility between the aluminum materials is better than that between different materials; due to external welding, cooling is rapid,no hot-pressing gas enters the cap, and the phenomena that due to the fact that the hot-pressing problem is caused by ultrasonic welding, the pressure of the anti-explosion piece is large, and even an anti-explosion pressure value is broken down are avoided.
Description
technical field [0001] The invention relates to the field of power lithium batteries, in particular to a power lithium battery cap. Background technique [0002] Explosion-proof caps for power lithium batteries include structures such as top caps, explosion-proof discs, insulating rings, and orifice plates. The combination of these structures requires high-demand welding technology and high-performance materials to meet the requirements of different caps on the market. For industrial manufacturing, good design gives way to technical processes and materials. [0003] In the prior art, the combination of the top cover, the explosion-proof disk, the insulating ring and the orifice plate adopts packaging processes such as laser welding or ultrasonic welding. These processes have the following defects. For example, ultrasonic welding is based on the ultrasonic principle. However, if the sheet is welded, the burn-through melting temperature is as high as above 1,000 degrees, and ...
Claims
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Login to View More IPC IPC(8): H01M2/04H01M50/147
CPCH01M50/147Y02E60/10
Inventor 陈绍辉刘勇许小亮
Owner 安徽镭腾能源科技有限公司