CN-122025962-A - Battery pack and assembling method of battery cell module

Abstract

The application discloses a battery pack and an assembly method of a battery cell module. The battery pack comprises a shell, a plurality of battery cells accommodated in the shell, a support accommodated in the shell and used for supporting the battery cells, an end cover accommodated in the shell and mounted to the end face of the support, wherein the battery cells comprise electrodes, the support is provided with end faces corresponding to the positions of the electrodes of the battery cells and provided with openings for exposing the electrodes, and sealing glue is filled between the end cover and the end face, the end cover and/or the end face is/are provided with a spacer, the sealing glue is divided into a plurality of areas divided by the spacer, and the sealing glue covers the electrodes in the areas in a partitioning manner.

Inventors

• LI WEIBO
• ZHANG YUEXIANG

Assignees

• 南京泉峰科技有限公司

Dates

Publication Date

20260512

Application Date

20241030

Claims (20)

1. 1. A battery pack, the battery pack comprising: A housing; A plurality of electrical cells housed within the housing, the electrical cells including electrodes; a holder accommodated in the housing and supporting the battery cell, the holder having an end surface corresponding to the electrode position of the battery cell, and the end surface having an opening exposing the electrode; An end cap housed within the housing and mounted to the end face of the bracket; and a sealant is filled between the end cover and the end face, the end cover and/or the end face is/are formed with a spacer, the sealant is separated into a plurality of areas separated by the spacer, and the sealant area covers the electrodes in the areas.
2. 2. The battery pack of claim 1, wherein a plurality of the electrodes in the same region are electrically connected by one connecting sheet.
3. 3. The battery pack of claim 2, wherein the connecting tab electrically connects a plurality of the electrodes in the same region via the opening in which the end face exposes the electrode.
4. 4. The battery pack of claim 2, wherein the tabs are slotted near the interface with the electrode.
5. 5. The battery pack of claim 2, wherein the separator is disposed around the tab.
6. 6. The battery pack of claim 1, wherein the bracket is coupled to the end cap by a male-female seam allowance.
7. 7. The battery pack according to claim 6, wherein the female and/or male tabs are provided with a sealing material comprising a soft gel.
8. 8. The battery pack of claim 1, wherein the cell further comprises a cell body, at least a portion of the cell body not being covered by the sealant.
9. 9. The battery pack of claim 1, wherein the sealant comprises one or more of a one-component silicone, a two-component potting adhesive, and an intumescent adhesive.
10. 10. The battery pack according to claim 1, wherein the sealant has a thermal conductivity of 0.3W/(m-K) or more.
11. 11. The battery pack of claim 1, wherein the end cap comprises a flame retardant material.
12. 12. A battery pack, the battery pack comprising: A housing; a battery cell housed within the housing, the battery cell including an electrode; a holder accommodated in the housing and supporting the battery cell, the holder having an end surface corresponding to the electrode position of the battery cell, and the end surface having an opening exposing the electrode; An end cap housed within the housing and mounted to the end face of the bracket; and sealant is filled between the end cover and the end surface, the sealant covers a plurality of electrodes, the electrodes covered by the sealant comprise a first electrode and a second electrode, and the shortest distance between the first electrode and the end cover is smaller than the shortest distance between the second electrode and the end cover.
13. 13. The battery pack of claim 12, wherein the battery pack comprises a plurality of battery cells, The first type of electrode includes a positive electrode of the cell.
14. 14. The battery pack of claim 13, wherein the battery pack comprises a plurality of battery cells, The second type of electrode includes a negative electrode of the cell.
15. 15. The battery pack of claim 12, wherein the battery pack comprises a plurality of battery cells, And a recess is formed at a position of the end cover corresponding to the electrode of the battery cell, and the recess depth of the end cover corresponding to the first type electrode is larger than that of the end cover corresponding to the second type electrode.
16. 16. The battery pack of claim 15, wherein the end cap is formed with a countersunk boss toward the first-type electrode at a location corresponding to the location of the first-type electrode.
17. 17. The battery pack of claim 16, wherein the central partial region of the countersunk boss has a thin-walled feature.
18. 18. The battery pack of claim 12, wherein the battery pack comprises a plurality of battery cells, The thickness of the part of the end cover corresponding to the first type electrode is smaller than that of the part of the end cover corresponding to the second type electrode.
19. 19. The battery pack of claim 12, wherein the battery pack comprises a plurality of battery cells, The end cap is fixedly mounted to the end face of the bracket by a fastener.
20. 20. An assembly method of a battery cell module, comprising: mounting a plurality of cells to a bracket, the cells including electrodes, the bracket having end faces corresponding to the electrode positions of the cells, and the end faces having openings exposing the electrodes; welding a connecting piece with a plurality of the electrodes via the opening exposing the electrodes from the end face; covering the surfaces of the connecting sheet and the plurality of electrodes with sealant; An end cap is mounted to the end face of the bracket, the end cap compressing the sealant.

Description

Battery pack and assembling method of battery cell module Technical Field The application relates to the technical field of electric tools, in particular to a battery pack and an assembly method of a battery cell module. Background The energy supply iteration of manual operation and fuel oil is carried out, and at present, most of tools widely applied to various scenes such as gardens, buildings and the like use lithium batteries to realize energy supply. One of the emphasis in lithium battery technology is on safety, which includes safety on both a microscopic level, for example, possibly related to the positive and negative electrode materials of the battery cell, and safety on a macroscopic level, for example, water resistance, insulation, heat dissipation, fire resistance, extrusion, drop, etc., and in order to improve the overall performance of the battery pack, the adaptation of the battery pack for an electric tool to severe conditions needs to be considered in combination with the above factors. This section provides background information related to the application, which is not necessarily prior art. Disclosure of Invention It is an object of the present application to solve or at least mitigate some or all of the above problems. To this end, the application provides a battery pack and a method for assembling a battery cell module. In order to achieve the above object, the present application adopts the following technical scheme: A battery pack comprises a shell, a plurality of battery cells accommodated in the shell, a support, an end cover and a sealing glue, wherein the battery cells comprise electrodes, the support is accommodated in the shell and supports the battery cells, the support is provided with an end face corresponding to the electrode positions of the battery cells and provided with an opening exposing the electrodes, the end cover is accommodated in the shell and mounted to the end face of the support, the sealing glue is filled between the end cover and the end face, the end cover and/or the end face is/are formed with a separator, the sealing glue is separated in a plurality of areas divided by the separator, and the sealing glue covers the electrodes in the plurality of areas. In some embodiments, multiple electrodes within the same area are electrically connected by one connecting pad. In some embodiments, the tabs electrically connect multiple electrodes within the same area via an opening in the end face exposing the electrode. In some embodiments, the tabs are slotted near the interface with the electrode. In some embodiments, the spacer is disposed around the connection tab. In some embodiments, the bracket is coupled to the end cap via a male-female seam allowance. In some embodiments, the female and/or male tang is provided with a sealing material, including a soft gel. In some embodiments, the cell further comprises a cell body, at least a portion of the cell body being uncovered by the sealant. In some embodiments, the sealant comprises one or more of a one-component silicone, a two-component potting adhesive, and an intumescent adhesive. In some embodiments, the sealant has a thermal conductivity of 0.3W/(m·k) or more. In some embodiments, the end cap comprises a flame retardant material. A battery pack comprises a shell, a battery cell accommodated in the shell and comprising electrodes, a support accommodated in the shell and used for supporting the battery cell, an end cover accommodated in the shell and mounted to the end face of the support, wherein the end face is provided with an opening exposing the electrodes, the end cover is accommodated in the shell and comprises a sealant, the sealant is filled between the end cover and the end face and covers the electrodes, the electrodes covered by the sealant comprise a first electrode and a second electrode, and the shortest distance between the first electrode and the end cover is smaller than that between the second electrode and the end cover. In some embodiments, the first type of electrode comprises a positive electrode of a cell. In some embodiments, the second type of electrode comprises a negative electrode of a cell. In some embodiments, the end cap is formed with a recess at a location corresponding to the location of the electrode of the cell, the recess depth of the end cap corresponding to the first type of electrode being greater than the recess depth of the end cap corresponding to the second type of electrode. In some embodiments, the end cap is formed with a countersunk boss toward the first-type electrode at a location corresponding to the location of the first-type electrode. In some embodiments, the central local region of the countersunk boss has a thin-walled feature. In some embodiments, the thickness of the portion of the end cap corresponding to the location of the first type of electrode is less than the thickness of the portion of the end cap corresponding to the location of the second type