Battery cell formation method and clamping device for battery cell formation
A technology of clamping device and formation method, which is applied to the clamping device of battery formation and the field of battery formation, which can solve the problems of poor rate performance, electric cycle performance, and poor flatness of battery pole pieces.
Inactive Publication Date: 2019-12-06
FARASIS TECH (GANZHOU) CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to provide a battery formation method to overcome the problems of poor surface flatness, rate performance and poor electric cycle performance of the battery pole pieces in the prior art, which can make The surface of the prepared battery pole piece is smoother, and can improve the rate performance and electric cycle performance of the battery
Method used
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Embodiment 1
[0057] Prepare a cell, the cell includes a cell body and an airbag bag 20 connected to the cell body, and the cell also includes a pair of tabs arranged on the cell body and opposite to the airbag bag 20 , using a clamping device for cell formation to clamp and press the cell body when the cell is formed;
[0058] Among them, the clamping device 1 such as figure 1 Shown in: including a pair of guide rods 14, at least three splints 10, a fixed frame 18 and a pressurizing mechanism 16, a pair of guide rods 14 are spaced apart from each other, and a pair of guide rods 14 are respectively arranged on both sides of the splint 10, The two ends of the guide rod 14 are installed on the fixed frame 18, each splint 10 is perpendicular to the horizontal plane, the two sides of each splint 10 are respectively sleeved on the corresponding guide rod 14, and each splint 10 can extend along the direction of the guide rod 14 Moving, the two walls of the splint 10 are provided with an elastic ...
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The invention relates to the technical field of battery preparation, and discloses a battery cell formation method and a clamping device for battery cell formation. A battery cell comprises a batterycell body, an airbag (20) connected to the battery cell body, and a pair of tabs arranged on the battery cell body and capable of being connected with an external circuit. The battery cell formation method comprises the following steps: S10, enabling the airbag to be located at the upper side of the battery cell body and clamping the battery cell body of the battery cell so as to apply pressure totwo side surfaces of the battery cell body respectively; S20, after the battery cell body is clamped, placing the battery cell at a preset temperature for charging. The clamping device (1) comprisesa clamping body provided with a clamping cavity capable of accommodating the battery cell body of the battery cell, wherein the clamping cavity is provided with a pair of clamping walls capable of being in contact with the two side faces of the battery cell body respectively, and the pair of clamping walls are arranged to be capable of clamping the battery cell body so as to apply pressure to thetwo side faces of the battery cell body respectively. According to the battery cell formation method, the surface flatness and the electric cycle performance of the battery cell pole piece are improved.
Description
technical field [0001] The invention relates to the technical field of battery preparation, in particular to a cell formation method and a clamping device for cell formation. Background technique [0002] A cell refers to a single electrochemical cell containing positive and negative electrodes. Taking the preparation of polymer batteries as an example, formation is a particularly important part of many processes. Its main purpose is to form a layer of solid electrolyte interphase (SEI film for short) on the surface of the electrode material during the first charging process. , the performance of the SEI film will directly determine the cycle performance of the battery and the consistency of the battery. However, in the existing formation process, the batteries are directly charged and formed, and the surface of the electrode sheet of the batteries prepared in this way is very easy to precipitate lithium, the consistency is poor, and the electric cycle performance is also p...
Claims
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Login to View More IPC IPC(8): H01M10/44
CPCH01M10/446Y02E60/10
Inventor 刘显斌陈华伟李小伟赖丕萌熊得军丁斌J·W·江
Owner FARASIS TECH (GANZHOU) CO LTD