Patent ID: 11923551
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A battery cell, comprising:
a housing, providing an opening;
an electrode assembly, disposed in the housing, wherein the electrode assembly comprises a body portion and a tab, the tab extending from an end of the body portion to the opening, the electrode assembly comprising a first electrode plate, a second electrode plate, and a separator,
the first electrode plate and the second electrode plate each having a coated area and an uncoated area;
an end cover assembly, configured to cover the opening, wherein the end cover assembly comprises an end cover and a first insulator, the end cover is configured to cover the opening and is connected to the housing, the first insulator is disposed on a side of the end cover closer to inside of the housing, the first insulator has a concave portion, the tab is accommodated in the concave portion, and at least part of an inner wall of the concave portion is disposed surrounding a periphery of the tab; and,
a connecting piece comprising a first connecting portion and a second connecting portion, wherein, the first connecting portion is located between the first insulator and the electrode assembly and is located in the concave portion; and, wherein
a part of the electrode assembly corresponding to the coated areas of the first electrode plate and the second electrode plate is the body portion,
the uncoated area of the first electrode plate or the second electrode plate forms the tab, and
the separator is configured to isolate the first electrode plate from the second electrode plate; and, wherein

the electrode assembly further comprises a second insulator, and the second insulator is disposed surrounding an abutting area between the first insulator and the tab to isolate the abutting area from the housing;
wherein the second insulator abuts against an outer side surface of the first insulator facing toward an outer side surface of the housing; and
the battery cell further comprises a third insulator, the third insulator is disposed surrounding the second insulator and covers a transition area between the second insulator and the outer side surface.