Cylindrical battery cell, battery and method for forming cylindrical battery cell
AssigneeHefei Gotion High-Tech Power Energy Co., Ltd.
InventorsAzad DARBANDI, Tobias SCHMIEG, Qian CHENG, Chen LI
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Abstract
A cylindrical battery cell, a battery and a method for forming cylindrical battery cell are provided. In the cylindrical cell, an aluminum terminal of a cap component is welded with an aluminum current collector, a copper terminal of the cap component is welded with a first copper current collector which is connected to a copper component; the copper component is at least partly configured on a lateral surface of the jellyroll structure and is isolated from the aluminum current collector. Therefore, the thickness of the cell housing is decreased and an energy gravimetric and volumetric density of the cell is increased.
Claims20
A cylindrical battery cell, at least comprising:
- a cell housing having a cylindrical lateral portion and a bottom portion;
- a jellyroll structure which is arranged inside the cell housing;
- and
- a cap component which is configured on the jellyroll structure and is connected to the cylindrical lateral portion on an upper side of the cell housing;
- wherein the cap component at least comprises an aluminum terminal and a copper terminal, the aluminum terminal of the cap component being welded with an aluminum current collector which is welded with one or more flattened tabs of the jellyroll structure on an upper side of the jellyroll structure, the copper terminal of the cap component being welded with a first copper current collector which is connected to a copper component;
- wherein the copper component is at least partly configured on a lateral surface of the jellyroll structure, and is isolated from the aluminum current collector.
A method for forming cylindrical battery cell, comprising:
- forming a jellyroll structure and a cap component;
- forming a cell housing having a cylindrical lateral portion and a bottom portion;
- inserting the jellyroll structure into the cell housing;
- and
- configuring the cap component on the jellyroll structure;
- the cap component being connected to the cylindrical lateral portion on an upper side of the cell housing;
- wherein the cap component at least comprises an aluminum terminal and a copper terminal, the aluminum terminal of the cap component being welded with an aluminum current collector which is welded with one or more flattened tabs of the jellyroll structure on an upper side of the jellyroll structure, the copper terminal of the cap component being welded with a first copper current collector which is connected to a copper component;
- wherein the copper component is at least partly configured on a lateral surface of the jellyroll structure, and is isolated from the aluminum current collector.
Dependencies are inferred from the claim text.