An electrode terminal, a cover assembly and a battery containing the cover assembly
A technology of electrode terminals and cover plates, which is applied in the field of electrode terminals, cover plate components and batteries containing the cover plate components, can solve the problems of high defect rate, affecting battery safety performance, difficult welding, etc., achieve high yield rate, solve Stress effect, easy welding effect
Active Publication Date: 2017-04-05
BYD CO LTD
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- Abstract
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- Claims
- Application Information
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Problems solved by technology
[0005] The invention aims to solve the technical problems that the existing cover plate assembly using ceramics as the seal is difficult to weld, has a high defective rate, and affects the safety performance of the battery
Method used
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Embodiment
[0043] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Herein, the same reference numerals denote the same constituents. Moreover, it should be understood that in the description of the present invention, relative orientation terms such as "upper" and "lower" indicate that each component and its components in the cover assembly are figure 1 The relative position in the cross-sectional view of the cover plate assembly is shown to facilitate the description of the components and their components; but it is not used to limit the actual installation and positional relationship of these components and their components in the lithium-ion battery. It may be different from the actual installation and is not intended to limit the scope of the present invention.
[0044] The cover plate assembly of the present invention is used for the sealing of batteries, more commonly used for the sealing of lithium-ion bat...
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Abstract
The invention provides an electrode terminal, a cover plate assembly and a battery containing the cover plate assembly. The electrode terminal includes a pole and a pole cap located at one end of the pole; wherein, a buffer structure is provided on the inner surface of the pole cap, wherein the inner surface of the present invention refers to the leaking surface of the side where the pole cap contacts the pole. When the electrode terminal is welded with the insulating seal, it can well slow down the large stress generated by parts with different expansion coefficients of different materials during welding, and reduce its influence on the cover plate assembly, especially solving the problem of different materials with large differences The stress that occurs during welding leads to the problem that the ceramic seal is easily broken, which improves the reliability of the product, and the electrode terminal and cover plate assembly are easy to prepare. The prepared cover assembly is simple in process, easy to weld, high in product yield and good in stability, and lays a foundation for the practical application and development of ceramic sealed batteries.
Description
technical field [0001] The invention relates to an electrode terminal, a cover plate assembly and a battery containing the cover plate assembly. Background technique [0002] Lithium-ion battery is an important product of new energy, which has the advantages of no pollution, high capacity and long cycle life. At present, lithium-ion power batteries, lithium-ion tool batteries, network energy and other fields. Lithium-ion batteries are made by winding or stacking the positive electrode sheet, diaphragm, and negative electrode sheet into the core, then putting the core into the cavity formed by the battery case and the sealed cover plate, injecting the electrolyte into the inside, and then sealing and forming. get. The sealing cover is an indispensable component of the lithium battery seal, and its safety, sealing, aging resistance, insulation, and the size of the space occupied in the battery are of great significance. In addition, the cover assembly occupies the entire A ...
Claims
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IPC IPC(8): H01M2/30H01M2/04H01M10/0525H01M50/169H01M50/184H01M50/186H01M50/188H01M50/543H01M50/552
CPCY02E60/10
Inventor 邓奇思汪鲁建何昱臣吴强
Owner BYD CO LTD