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CN-122000635-A - Battery pack

CN122000635ACN 122000635 ACN122000635 ACN 122000635ACN-122000635-A

Abstract

The application discloses a battery pack. The battery pack comprises a shell, a battery core accommodated in the shell and comprising an electrode, a bracket accommodated in the shell and supporting the battery core, a first metal plate accommodated in the shell and approximately perpendicular to the central axis of the battery core and provided with an opening, wherein air flow sprayed at the electrode passes through the opening of the first metal plate when the battery core is in thermal runaway, a second metal plate accommodated in the shell and approximately parallel to the first metal plate, and an exhaust channel is formed by the second metal plate and the first metal plate and guides the air flow to be exhausted out of the shell.

Inventors

  • LI WEIBO
  • ZHANG YUEXIANG

Assignees

  • 南京泉峰科技有限公司

Dates

Publication Date
20260508
Application Date
20241030

Claims (11)

  1. 1. A battery pack, the battery pack comprising: A housing; A battery cell housed within the housing, the battery cell including an electrode; a bracket accommodated in the housing and supporting the battery cell; A first metal plate accommodated in the housing, the first metal plate being substantially perpendicular to a central axis of the cell, and the first metal plate having an opening through which an air flow ejected at the electrode passes when thermal runaway of the cell occurs; and the second metal plate is accommodated in the shell and is approximately parallel to the first metal plate, and the second metal plate and the first metal plate form an exhaust channel, and the exhaust channel guides the airflow to be discharged out of the shell.
  2. 2. The battery pack of claim 1, wherein the first metal plate has a plurality of openings in one-to-one correspondence with the electrode positions of the cells.
  3. 3. The battery pack of claim 1, wherein the housing has an airflow outlet, at least a portion of the airflow outlet being provided with a fire protection member that is different from the housing material.
  4. 4. A battery pack as claimed in claim 3, wherein the fireproof member is a metal plate having an opening positioned corresponding to the air flow outlet.
  5. 5. The battery pack according to claim 1, wherein the first metal plate and/or the second metal plate is made of an aluminum alloy material.
  6. 6. The battery pack according to claim 1, further comprising a third metal plate and a fourth metal plate, wherein the third metal plate is substantially perpendicular to a central axis of the cell, and the third metal plate has an opening through which an air flow ejected at the electrode passes when thermal runaway of the cell occurs, the fourth metal plate is substantially parallel to the third metal plate, the third metal plate and the fourth metal plate constitute an air discharge passage that guides the air flow to be discharged outside the case, and the air discharge passage constituted by the third metal plate and the fourth metal plate is located on different sides of the cell than the air discharge passage constituted by the first metal plate and the second metal plate.
  7. 7. The battery pack of claim 1, wherein the holder has an end face corresponding to the electrode position of the cell and the end face has an opening exposing the electrode, the battery pack further comprising an end cap received in the housing and mounted to the end face of the holder, and a sealant filled between the end cap and the end face.
  8. 8. The battery pack of claim 7, wherein the first metal plate is mounted to the end cap, the first metal plate being substantially parallel to the end cap.
  9. 9. The battery pack according to claim 8, wherein the opening of the first metal plate corresponds to an opening position of the end face of the bracket.
  10. 10. The battery pack according to claim 7, wherein the end cap and/or the end face are formed with separators, the sealant is partitioned into a plurality of regions partitioned by the separators, and the sealant partition covers the electrodes in the plurality of regions.
  11. 11. The battery pack of claim 10, wherein a plurality of the electrodes in the same region are electrically connected by a connecting tab that electrically connects a plurality of the electrodes in the same region via the opening in which the end face exposes the electrodes.

Description

Battery pack Technical Field The application relates to the technical field of electric tools, in particular to a battery pack. 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 present application provides a battery pack. The 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 of electrode. In some embodiments, the end cap is fixedly mounted to the end face of the bracket by a fastener. A method for assembling a battery cell module comprises the steps of