| CPC H01M 50/536 (2021.01) [B23K 26/21 (2015.10); H01M 10/0431 (2013.01); H01M 50/107 (2021.01); H01M 50/152 (2021.01); H01M 50/533 (2021.01); H01M 50/627 (2021.01)] | 20 Claims |
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1. An energy storage device, comprising:
an end cap;
a housing; and
a current collector arranged between the end cap and the housing, wherein
an outer peripheral side surface of the end cap is flush with an outer peripheral side surface of the housing;
the current collector comprises a main body and a welding portion, the main body and the welding portion are integrally formed, the main body has a first surface and a second surface facing away from the first surface, the end cap is connected to the first surface of the main body, the housing is connected to the second surface of the main body, and the welding portion is connected to the outer peripheral side surface of the end cap, the outer peripheral side surface of the housing, and an outer peripheral side surface of the main body;
the current collector satisfies one of the following: the outer peripheral side surface of the main body is flush with both the outer peripheral side surface of the end cap and the outer peripheral side surface of the housing, in a radial direction of the current collector; and the outer peripheral side surface of the main body protrudes from both the outer peripheral side surface of the end cap and the outer peripheral side surface of the housing, in the radial direction of the current collector; and
the welding portion protrudes from the end cap by a width L1, wherein the width L1 satisfies: 0.05 mm≤L1≤1.45 mm; and the welding portion protrudes from the housing by a width L2, wherein the width L2 satisfies: 0.05 mm≤L2≤1.45 mm.
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