Coiled battery cell
A winding type battery cell technology, applied in the direction of winding/folding electrodes, circuits, electrical components, etc., can solve the problems of poor infiltration of the electrolyte effect, affecting the thickness of the battery, and affecting the service life of the battery cell.
Inactive Publication Date: 2018-06-01
泸州京瑞电子科技有限公司
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Problems solved by technology
[0004] The main problems of the wound-type batteries in the prior art are: (1) After the positive pole piece, the negative pole piece and the separator are wound, they are tightly bonded, and the effect of the electrolyte infiltration is not good: (2) The electrolyte will change with the The use of the battery cell is gradually consumed, which affects the service life of the battery cell. In order to prolong the life of the battery cell, the existing technology reserves too much electrolyte in the preparation of the cell outlet, which affects the thickness of the battery.
Method used
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Embodiment
[0015] like figure 1 As shown, the winding cell includes a first pole piece 1 , a first pole tab, a second pole piece 2 , a second pole tab and a separator 3 . The first pole piece 1 includes a first current collector and the active material covering the surface of the first current collector; the second pole piece 2 includes a second current collector and the active material covering the surface of the second current collector. The first tab and the second tab are punched and formed by the first current collector and the second current collector respectively.
[0016] The first pole piece is opposite to the second pole piece, and the first pole piece 1 and the second pole piece 2 are wound in opposite directions and wound into rolls, wherein the first pole piece 1 is located at the periphery of the second pole piece 2; An isolation film 3 is provided between the first pole piece 1 and the second pole piece 2 to separate the active material on the first pole piece 1 from the ...
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The invention discloses a coiled battery cell and solves the problems in the prior art that the electrolyte infiltrating effect is not good and the battery is quite thick in order to guarantee the battery durability. The coiled battery cell comprises a coiled first pole piece, a coiled second pole piece and an isolating membrane therebetween; the first pole piece comprises a first current collector and an active substance covering the surface of the first current collector; the second pole piece comprises a second current collector and an active substance covering the surface of the second current collector; a first lug and a second lug are respectively formed by punching the first current collector and the second current collector; the coiled battery cell is characterized in that supportbulges are spaced on the isolating membrane. The technical scheme can perfectly solve the problems in the prior art.
Description
technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a winding battery core of a secondary battery. Background technique [0002] Secondary batteries, also known as rechargeable batteries or storage batteries, refer to batteries that can be activated by charging the active material after the battery is discharged and continue to be used. [0003] Winding battery cell is a commonly used battery cell. It is composed of positive pole piece, negative pole piece and separator. The positive and negative pole ears lead out the positive and negative poles in the battery. The active material contacts on the pole piece. [0004] The main problems of the wound-type batteries in the prior art are: (1) After the positive pole piece, the negative pole piece and the separator are wound, they are tightly bonded, and the effect of the electrolyte infiltration is not good: (2) The electrolyte will change with the The use of the batte...
Claims
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IPC IPC(8): H01M10/04H01M2/18H01M50/463
CPCH01M10/0431H01M50/463Y02E60/10Y02P70/50
Inventor 熊华
Owner 泸州京瑞电子科技有限公司