Pole piece and preparation method thereof, battery and electronic device
A pole piece and battery technology, applied in the fields of batteries, electronic devices, pole pieces and their preparation, can solve the problems affecting the performance of the battery, and achieve the effects of reducing the risk of short circuit, improving the safety performance and ensuring the performance.
Pending Publication Date: 2022-07-19
NINGDE AMPEREX TECH
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Problems solved by technology
[0004] However, in the process of cutting the pole piece motherboard, due to the influence of cutting accuracy, it is easy to form redundant empty foil areas on the pole piece, which affects the performance of the battery
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[0050] The inventor of the present application found in practical work that, when preparing the pole piece, it is necessary to provide a pole piece mother board provided with a pole lug groove first, and then use a die-cutting mechanism to cut the pole piece mother board into several pole pieces. The process is prone to errors and easily damages the tab grooves, so that two slots will be formed on the adjacent pole pieces, one of which is used for welding the tabs, and the other slot will be idle to form redundant empty foil areas, which will affect the poles. performance of the tablet.
[0051] In order to solve the above-mentioned technical problems, the embodiments of the present application provide a pole piece and a preparation method thereof, a battery, and an electronic device. When it is used, it will not damage the tab groove, avoid the formation of redundant empty foil areas on the pole piece, and ensure the use performance of the pole piece, thereby ensuring the use...
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Abstract
The invention provides a pole piece and a preparation method thereof, a battery and an electronic device, and relates to the technical field of energy storage, the pole piece comprises a current collector and a diaphragm arranged on the surface of the current collector; at least one diaphragm is provided with a tab groove, the tab groove and the edge of the pole piece in the width direction are arranged at an interval, and the tab groove is exposed out of the surface of the current collector; a notch communicated with the tab groove is formed in the side face of the diaphragm provided with the tab groove, the notch penetrates through the current collector in the direction perpendicular to the diaphragm, and an arc-shaped face is arranged between every two adjacent inner wall faces of the notch. According to the invention, the gap which penetrates through the current collector and is communicated with the tab groove is formed in the pole piece, and the arc-shaped surface is arranged between the two adjacent inner wall surfaces of the gap, so that compared with the mode that the two adjacent inner wall surfaces of the gap form a right angle, the arc-shaped surface can reduce the stress at the joint of the two inner wall surfaces and can also prevent burrs from being formed at the joint of the two inner wall surfaces; therefore, the risk of short circuit of the electrode assembly is reduced, and the safety performance of the battery is improved.
Description
technical field [0001] The present application relates to the technical field of energy storage, and in particular, to a pole piece and a preparation method thereof, a battery, and an electronic device. Background technique [0002] A battery is a device that converts chemical energy into electrical energy. It is widely used in new energy vehicles, energy storage power stations, etc. The pole pieces are oppositely arranged on both sides of the isolation membrane, and the polarities of the two pole pieces are opposite, and the pole pieces are provided with pole ear grooves for welding the pole lugs, and the charging and discharging functions of the battery are realized through the pole lugs. [0003] In the related art, when preparing a pole piece, usually a larger size pole piece mother board is first made, a number of pole ear grooves are formed on the pole piece mother board, and then the pole piece is cut along the cutting line by a cutting mechanism. Motherboard, the po...
Claims
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IPC IPC(8): H01M4/13H01M4/139H01M10/052
CPCH01M4/13H01M4/139H01M10/052Y02E60/10H01M50/536H01M10/0585H01M50/533H01M50/586H01M50/595H01M4/04H01M4/70H01M2004/021
Inventor 吴华张誉赵义何平
Owner NINGDE AMPEREX TECH