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CN-224217565-U - Battery monomer and battery package

CN224217565UCN 224217565 UCN224217565 UCN 224217565UCN-224217565-U

Abstract

The application provides a battery monomer and a battery pack, and relates to the technical field of batteries. The battery unit comprises a shell with a containing cavity, a cover plate connected with the shell to cover the containing cavity, a pole penetrating through the cover plate and an electrode assembly arranged in the containing cavity. The electrode assembly comprises an electrode body and a tab which are connected, wherein the bending part of the tab is positioned on one side of the electrode body, which is close to the cover plate, and the bending part is connected with one side, which is away from the electrode body, of the first pole portion of the pole. According to the battery cell provided by the application, through the arrangement of the first pole column part, the pole lug can be assisted to bend and the bending part of the pole lug can be restrained, so that the risk of inserting the bending part into the electrode body is reduced, and the safety of the battery cell is improved.

Inventors

  • YUAN HAO
  • HU MINGJIANG
  • YANG WEI

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250521

Claims (10)

  1. 1. A battery cell, comprising: A housing (110) having a receiving chamber (111); a cover plate (120) connected with the housing (110) to cover the accommodating chamber (111); A pole (130) penetrating through the cover plate (120), wherein the pole (130) comprises a first pole part (132) positioned in the accommodating cavity (111); Electrode assembly (140), set up in hold intracavity (111), electrode assembly (140) are including electrode body (141) and utmost point ear (142) that are connected, utmost point ear (142) have kink (1421), kink (1421) are located electrode body (141) are close to one side of apron (120), kink (1421) with first utmost point post portion (132) deviate from one side of electrode body (141) is connected.
  2. 2. The battery cell according to claim 1, wherein the post (130) further includes a second post portion (131) connected to the first post portion (132), the second post portion (131) is disposed through the cover plate (120), the first post portion (132) is disposed around a circumference of the second post portion (131), and the bent portion (1421) is welded to a side of the first post portion (132) facing away from the electrode body (141) and extends in a direction approaching the second post portion (131).
  3. 3. The battery cell according to claim 2, wherein a receiving groove (133) is provided at a side of the first pole portion (132) facing away from the electrode body (141), the receiving groove (133) is recessed in a direction approaching the electrode body (141), and an end of the bending portion (1421) approaching the second pole portion (131) is located in the receiving groove (133).
  4. 4. A battery cell according to claim 3, wherein the accommodation groove (133) is provided near the second pillar portion (131), and the portion of the bending portion (1421) near the second pillar portion (131) is wound in the accommodation groove (133).
  5. 5. The battery cell of claim 2, further comprising a first insulating member (170) disposed in the accommodating cavity (111), the first insulating member (170) being connected to a side of the cover plate (120) near the electrode body (141), the second post portion (131) being disposed through the first insulating member (170), and the bending portion (1421) being disposed between the first insulating member (170) and the first post portion (132).
  6. 6. The battery cell of claim 2, further comprising a protective layer (150) located within the receiving cavity (111), the protective layer (150) being disposed about an end of the first pole portion (132) remote from the second pole portion (131), a portion of the protective layer (150) being located between the bend portion (1421) and the end of the first pole portion (132) remote from the second pole portion (131).
  7. 7. The battery cell according to claim 2, wherein an end of the first pole portion (132) remote from the second pole portion (131) is provided with an arc portion (134).
  8. 8. The battery cell of any one of claims 2 to 7, further comprising a second insulator (160) located outside the receiving cavity (111), the second pole portion (131) comprising a first pole segment (1311) and a second pole segment (1312) connected, the second insulator (160) being disposed between the first pole segment (1311) and the cover plate (120), the second pole segment (1312) being disposed through the cover plate (120), the second pole segment (1312) being integrally formed with the first pole portion (132).
  9. 9. The battery cell of claim 8, wherein a groove (1313) is provided on an outer peripheral side of the first pole segment (1311), and a portion of the second insulator (160) is provided in the groove (1313).
  10. 10. A battery pack comprising the battery cell according to any one of claims 1 to 9.

Description

Battery monomer and battery package Technical Field The application relates to the technical field of batteries, in particular to a battery monomer and a battery pack. Background The information disclosed in this background section is only for enhancement of understanding of the general background of the disclosure and is not to be taken as an admission or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art. With the development of battery technology, the safety requirements for battery cells are also increasing. In the process of manufacturing the battery cell, it is necessary to perform lamination of the electrode assembly and bend the tab of the electrode assembly so as to assemble the electrode assembly into the case. However, the bent portions of the tabs are easily inserted into the electrode body to cause short circuits, thereby affecting the safety of the battery cell. Disclosure of utility model Accordingly, the present application is directed to a battery cell and a battery pack, which are aimed at solving the technical problem that the bending portion of the tab is easy to be inserted into the electrode body to cause short circuit. In order to achieve the above purpose, the technical scheme adopted by the application is as follows: in a first aspect, embodiments of the present application provide a battery cell, comprising: a housing having a receiving cavity; A cover plate connected with the shell to cover the accommodating cavity; The pole is arranged in a penetrating manner on the cover plate and comprises a first pole part positioned in the accommodating cavity; The electrode assembly is arranged in the accommodating cavity and comprises an electrode body and a tab which are connected, the tab is provided with a bending part, the bending part is positioned on one side, close to the cover plate, of the electrode body, and the bending part is connected with one side, deviating from the electrode body, of the first pole portion. In one embodiment of the first aspect, the pole further includes a second pole portion connected to the first pole portion, the second pole portion is disposed through the cover plate, the first pole portion is disposed around a circumference of the second pole portion, and the bending portion and the first pole portion are welded on a side facing away from the electrode body and extend in a direction approaching the second pole portion. In one embodiment of the first aspect, a receiving groove is formed in a side, facing away from the electrode body, of the first pole portion, the receiving groove is recessed in a direction approaching the electrode body, and one end, approaching the second pole portion, of the bending portion is located in the receiving groove. In one embodiment of the first aspect, the accommodating groove is disposed near the second pillar portion, and a portion of the bending portion near the second pillar portion is wound in the accommodating groove. In one embodiment of the first aspect, the battery unit further includes a first insulating member located in the accommodating cavity, the first insulating member is connected to a side of the cover plate, which is close to the electrode body, the second pole portion is disposed through the first insulating member, and the bending portion is located between the first insulating member and the first pole portion. In one embodiment of the first aspect, the battery cell further includes a protective layer located in the accommodating cavity, the protective layer is wrapped around an end portion of the first pole portion, which is far away from the second pole portion, and a portion of the protective layer is located between the bending portion and the end portion of the first pole portion, which is far away from the second pole portion. In one embodiment of the first aspect, an end of the first pole portion remote from the second pole portion is provided with an arcuate portion. In one embodiment of the first aspect, the battery unit further includes a second insulating member located outside the accommodating cavity, the second pole portion includes a first pole segment and a second pole segment connected to each other, the second insulating member is disposed between the first pole segment and the cover plate, the second pole segment is disposed through the cover plate, and the second pole segment and the first pole portion are integrally formed. In one embodiment of the first aspect, the outer circumferential side of the first pole segment is provided with a groove, and a portion of the second insulator is disposed in the groove. In a second aspect, embodiments of the present application provide a battery pack comprising a battery cell as described in any of the embodiments of the first aspect above. The beneficial effects of the application are as follows: In the battery cell provided by the application, the bending part of the tab is pos