Combination cover plate for lithium battery
A combination cover and lithium battery technology, which is applied to lithium batteries, battery pack parts, battery boxes/outer casings, etc., can solve the problems of small sealing area of glass sealing sleeves, small internal pressure of batteries, and small amount of glass insulators, etc., to achieve Solve the problem of battery leakage rate, improve the performance of pressure resistance and leakage resistance, and improve the pass rate
Inactive Publication Date: 2017-07-07
BENGBU FUYUAN ELECTRONICS TECH
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Problems solved by technology
[0003] In the structure of lithium battery, the cover group is a key part of it. At present, the sintered glass sealing sleeve in the cover group produced by domestic and foreign manufacturers is a straight column type, which has the following disadvantages: the cylinder of the glass sealing sleeve is sealed with the bottom plate The area is small, and the internal pressure of the battery is small; the glass insulator is small, and the resistance to welding heat is poor, which is easy to cause glass cracks, resulting in liquid leakage and failure
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[0011] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0012] Such as figure 1 As shown, a combined cover plate for lithium batteries provided by the present invention includes a first cover plate 1 and a second cover plate 2 that cooperate with each other, and a first screw hole 1.1 is provided in the center of the first cover plate 1. The center of the second cover plate 2 is provided with a second screw hole 2.1 corresponding to the first screw hole 1.1, the first screw hole 1.1 and the second screw hole 2.1 have the same structure, both are stepped holes, and are relatively The small hole is provided with an internal thread, and the first screw ho...
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The invention discloses a combination cover plate for a lithium battery. The combination cover plate comprises a first cover plate body and a second cover plate body which are matched with each other, a first screw hole is formed in the center of the first cover plate body, a second screw hole correspondingly matched with the first screw hole is formed in the center of the second cover plate body, a glass seal sleeve is connected into the first screw hole and the second screw hole in a sealed mode, the outer sides of the first cover plate and the second cover plate are connected with an annular plate in a sleeved mode, an injecting hole is formed in the annular plate, the two sides of the annular plate are each connected with a seal end cover in a sealed mode, and the first cover plate body, the second cover plate body, the glass seal sleeve, the annular plate and the injecting hole are all arranged between the two seal end covers. The combination cover plate has the advantages that the device bears large internal pressure of the battery, the glass insulator weight is large, the soldering resistance thermal property is improved, after melt welding, cracks are not likely to occur, the battery leakage rate problem is solved, the yield of the lithium battery is increased, and the product structure can be developed towards miniaturization and portability; the voltage resistance and leakage resistance of the product are improved.
Description
technical field [0001] The invention relates to the technical field of batteries, in particular to a combined cover plate for lithium batteries. Background technique [0002] Cylindrical lithium battery is a new type of power supply product developed in recent years. It has high specific energy, high open circuit voltage, wide range of service intensity, stable working voltage, long service life, low self-discharge rate, long storage life, and pollution-free, etc. Excellent quality, widely used in smart card tables, computer support power supplies, medical devices, wireless communications, scientific research instruments and other fields. [0003] In the structure of lithium battery, the cover group is a key part of it. At present, the sintered glass sealing sleeve in the cover group produced by domestic and foreign manufacturers is a straight column type, which has the following disadvantages: the cylinder of the glass sealing sleeve is sealed with the bottom plate The are...
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IPC IPC(8): H01M2/04H01M2/08H01M10/052H01M50/147H01M50/184H01M50/186
CPCH01M10/052H01M50/148H01M50/183Y02E60/10
Inventor 郭茂玉李奎钱竹平
Owner BENGBU FUYUAN ELECTRONICS TECH