Cylindrical energy storage cell
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorAzad Darbandi
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Abstract
A cylindrical energy storage cell includes a cylindrical housing, which has a cover, a bottom and a peripheral jacket between the cover and the bottom; and an electrode winding, which has a strip-type cathode, a strip-type anode and a strip-type separator between the cathode and the anode and which is disposed in the housing. The cathode has a first current collector, which is coated, in parts, with a first active material. The anode has a second current collector, which is coated, in parts, with a second active material. At least one wrap of a part of the second current collector not coated with the second active material is disposed around the electrode winding and in electrically conductive contact with the bottom and/or with the jacket.
Claims11
A cylindrical energy storage cell for use as supplier of energy for a drive of an electric or hybrid vehicle, the cylindrical energy storage cell comprising:
- a cylindrical housing with a cover, a base and a circumferential shell lying between the cover and the base;
- and
- an electrode winding comprising a strip-like cathode, a strip-like anode and a strip-like separator arranged between the cathode and the anode, wherein:
- the electrode winding is arranged in the housing,
- the cathode comprises a first current collector which is coated in first portions with a first active material,
- the anode comprises a second current collector which is coated in second portions with a second active material,
- at least one winding of a portion of the second current collector that is not coated with the second active material is arranged around the electrode winding and in electrically conductive contact with at least one of the base or the shell,
- the electrode winding comprises a first end side, a second end side and a circumferential outer side,
- the first end side faces the cover and the second end side faces the base, and
- at least one of:
- a first part of the at least one winding of the portion of the second current collector that is not coated with the second active material around the electrode winding extends beyond the first end side in a direction of the cover and is electrically conductively connected to the shell, or
- a second part of the at least one winding of the portion of the second current collector that is not coated with the second active material around the electrode winding extends beyond the second end side in a direction of the base and is electrically conductively connected to the shell.
Dependencies are inferred from the claim text.