Tab assembly and pole piece
A technology of tabs and components, applied to battery pack parts, electrical components, structural parts, etc., can solve problems such as easy tearing of welding positions
Inactive Publication Date: 2021-06-01
XIAMEN HAICHEN NEW ENERGY TECH CO LTD
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Problems solved by technology
[0003] The inventor found that during the transfer process, the tabs will be easily torn near the welding position during later use.
Method used
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Embodiment
[0035] figure 1 A schematic cross-sectional view of the first tab assembly 100 provided by the embodiment of the present application is shown. The tab assembly 100 includes a tab 110 , a bus piece 120 , a conductive piece 130 and a fixing piece 140 . In the figure, in order to make the figure clearer, the section line is not drawn, please refer to figure 1 , the tab assembly 100 includes a plurality of tabs 110, in figure 1 In the example shown, the tab 110 includes four tabs 110, and the polarities of the four tabs 110 are the same, for example, the four tabs 110 are all positive tabs, or the four tabs 110 are all negative tabs ; Multiple tabs 110 are stacked in layers.
[0036] In the present application, the tab 110 includes an insulating layer and a conductive metal layer covering at least one surface of the insulating layer. That is, only one surface of the insulating layer is provided with a metal conductive layer, or the two opposite surfaces of the insulating layer ...
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The invention relates to the field of batteries, and concretely relates to a tab assembly and a pole piece. The tab assembly comprises a bus piece, a plurality of overlapped tabs, a conductive piece and a fixing piece. The bus piece is attached to the tabs; the conductive piece penetrates through each tab, and each metal conductive layer and the bus piece are electrically connected with the conductive piece; and the fixing piece is positioned on at least one side of the plurality of tabs, and is connected with the conductive piece so as to keep the bus piece and the plurality of tabs in an attached state. The plurality of tabs are electrically connected through the conductive piece, the conductive piece is electrically connected with the current converging part, and charges of each metal conductive layer are intensively transmitted to the current bus piece through the conductive piece and the current bus piece, so that charge bus is realized. And the fixing piece positioned on one side of the plurality of tabs is connected with the conductive piece, so that the tabs and the convergence piece are kept in an attached state, and large impedance caused by separation between lamellar structures is avoided. The tab assembly provided by the invention can replace the existing manner of welding the tab by virtue of a transfer welding method, so that the problem that the tab is easy to tear due to the transfer welding method is avoided.
Description
technical field [0001] The present application relates to the battery field, in particular, to a tab assembly and a pole piece. Background technique [0002] At present, pole pieces made of current collectors composed of insulating layers and metal conductive layers are widely used. In the process of cell assembly, it is necessary to die-cut the lugs at the end of the pole pieces and transfer them to copper foil or aluminum foil. Then the positive pole piece, the negative pole piece and the diaphragm are laminated and wound; or the positive pole piece, the negative pole piece and the diaphragm are laminated directly. [0003] The inventors found that during the transfer process, the lugs are easily torn near the welding position during later use. Contents of the invention [0004] The purpose of the embodiments of the present application is to provide a tab assembly and a pole piece, which aims to provide a tab assembly that does not require transfer welding. [0005] Th...
Claims
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Login to View More IPC IPC(8): H01M50/531H01M50/536
CPCY02E60/10
Inventor 吴聪苗郭敏
Owner XIAMEN HAICHEN NEW ENERGY TECH CO LTD