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Battery and battery pole piece, manufacturing method and device thereof

A technology of battery pole piece and pole piece, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc. The pole pieces cannot be well bonded, so as to achieve good follow-up cycle performance, good wetting effect, and improve the effect of difficulty in entering the shell or packaging

Active Publication Date: 2022-05-03
远景动力技术(湖北)有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a battery and battery pole piece and its manufacturing method and device to solve the problem of battery cell thickness caused by the failure of the battery separator and the pole piece to be well bonded during the production process of the battery cell without a glue-coated separator. Thicker than the design value, the problem that the battery cannot be inserted into the shell or packaged

Method used

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  • Battery and battery pole piece, manufacturing method and device thereof
  • Battery and battery pole piece, manufacturing method and device thereof
  • Battery and battery pole piece, manufacturing method and device thereof

Examples

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Embodiment

[0062] A method for making battery pole pieces, the steps are the same as those of the comparative example, the difference is that, as image 3 As shown, after the conductive lugs for the battery core are formed by a die-cutting machine, the pole piece 1 passes through the second flower-making device 5 and the first flower-making device 4, and then the pole piece 1 is cut by a slitting machine 6 . During work, only the first flower-making device 4 is operated, the cylinder pressure of the first flower-making device 4 is 0.3MPa, and the first flower-making device 4 handles a tape transport speed of 80m / min. In the figure, the direction of the arrow is the tape running direction of the pole piece 1 .

[0063] Such as Figure 5 As shown, the batteries prepared in the comparison examples and examples are studied in the 1C / 1C charge-discharge cycle performance, and the observation of the experimental data shows that at 25 ° C, the battery is charged and discharged, and the mode of...

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Abstract

The invention discloses a battery, a battery pole piece, a manufacturing method and a device thereof, which belong to the technical field of battery manufacturing. The flower-making process is inserted between any two steps of the rolling process, tab die-cutting process, slitting process, cutting process, and winding process in the traditional battery pole piece production process. The battery pole piece is subjected to embossing treatment to make the surface of the battery pole piece embossed with concave and convex lines, and the battery pole piece after embossing is laminated or wound to form a battery. The invention improves the lamination effect between the battery pole piece and the separator in the production process of the battery cell using the non-adhesive separator, prevents the sliding between the battery pole piece and the separator, and further improves the difficulty of entering the shell or packaging caused by the thicker battery cell, Improve the abnormal thickness of finished batteries, reduce the scrapping of pole pieces and batteries during processing, reduce manufacturing costs, and have better subsequent cycle performance.

Description

technical field [0001] The invention relates to the technical field of battery production, in particular to a battery, a battery pole piece and a production method and device thereof. Background technique [0002] In the production process of lithium-ion batteries, with the further reduction of production costs, the diaphragm of energy storage lithium battery products gradually began to use PP base film. Since the surface of the base film was not dispensed, the diaphragm and pole pieces failed to Very good bonding, the thickness of the cell has a certain rebound after hot pressing, and there is a certain gap between the positive electrode sheet, the negative electrode sheet and the separator, and then the thickness of the cell is thicker than the design value, resulting in the electrode sheet being laminated or rolled. After winding, the thickness of the battery cell exceeds the standard of the casing or the cavity of the aluminum-plastic film, and the battery cell cannot be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/139H01M4/13H01M10/0525H01M50/406
CPCH01M4/139H01M4/13H01M50/406H01M10/0525Y02E60/10
Inventor 王云辉王腾李贵斌李锋光
Owner 远景动力技术(湖北)有限公司
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