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JP-2026514447-A - Battery modules and electrical equipment

JP2026514447AJP 2026514447 AJP2026514447 AJP 2026514447AJP-2026514447-A

Abstract

This application provides a battery module and an electrical equipment, the battery module comprising a first member, a second member, and a plurality of battery cell units arranged along a first direction. Each battery cell unit comprises a battery cell and a bracket. The battery cell comprises a cell housing, an electrode assembly provided in the cell housing, and electrode terminals. The cell housing comprises a main body and a first seal portion. The electrode terminals protrude out of the cell housing from the first seal portion. The main bodies of adjacent battery cells are in contact with each other and connected. The cell housing comprises a first wall, a second wall, a third wall, and a fourth wall. The first wall and the second wall are provided opposite each other along a second direction. The third wall and the fourth wall are provided opposite each other along a first direction. The bracket comprises a first portion. The first portion covers at least a portion of the first wall. When viewed from a second direction, the first portion shall not extend beyond the third wall in the first direction, and the first portion shall not extend beyond the fourth wall. The first member and the second member are configured to restrict the battery cells from moving away from each other. Battery modules can improve the energy density of the battery module.

Inventors

  • 農 文彬
  • 李 坤龍
  • 王 鵬飛

Assignees

  • 厦門新能達科技有限公司

Dates

Publication Date
20260511
Application Date
20230331

Claims (20)

  1. A battery module comprising a plurality of battery cell units, a first member, and a second member arranged along a first direction, wherein each battery cell unit comprises a battery cell and a bracket, The battery cell includes a cell housing, an electrode assembly, and electrode terminals, the electrode terminals being connected to the electrode assembly and extending out from the cell housing, The cell housing comprises a main body and a first sealing portion, the electrode assembly is disposed within the main body, the electrode terminals extend from the first sealing portion to the outside of the cell housing, and the main bodies of adjacent battery cells are in contact with each other and connected. The cell housing includes a first wall, a second wall, a third wall, and a fourth wall. The first wall and the second wall are provided facing each other along a second direction perpendicular to the first direction, The third wall and the fourth wall are provided facing each other along the first direction, The bracket includes a first portion, the first portion covering at least a portion of the first wall, When observed from the second direction, in the first direction, the first portion does not extend beyond the third wall, and the first portion does not extend beyond the fourth wall. The first member and the second member are arranged on both sides of the plurality of battery cell units along the first direction, The first member is configured to restrict the battery cells from separating from each other. The battery module is characterized in that the second member is configured to restrict the battery cells from separating from each other.
  2. The battery module according to claim 1, characterized in that, when observed from the second direction, the first portion is located between the third wall and the fourth wall in the first direction.
  3. The battery module according to claim 1 or 2, characterized in that each of the main body portions of the battery cell is under pressure.
  4. The battery cell unit includes two of the brackets, The cell housing includes two of the first sealing portions, The electrode terminals extend out of the cell housing from each of the two first sealing portions. The battery module according to any one of claims 1 to 3, characterized in that each of the first sealing portions covers the bracket.
  5. The battery module according to any one of claims 1 to 4, characterized in that the second member is arranged to apply pressure to the plurality of battery cell units and provide an expansion space for the battery cell units.
  6. The battery module comprises a housing, and the battery cell unit is installed inside the housing. The second member has a base portion and a bent portion, The base portion is connected to the bent portion, The bent portion is fixed to the housing, The base is positioned so as to be able to apply pressure to the battery cell unit. The battery module according to claim 5, characterized in that the bent portion is arranged to provide an expansion space for the battery cell unit.
  7. The bent portion includes a first bent portion and a second bent portion arranged in a third direction, the first bent portion connecting one side of the base, and the second bent portion connecting the other side of the base. The battery module according to claim 6, characterized in that the first direction, the second direction, and the third direction are orthogonal to each other.
  8. The second member includes the first connecting portion, The battery module according to claim 7, characterized in that the first connecting portion is connected to the side of the first bending portion away from the base and fixed to the housing.
  9. The first bent portion includes a first bent segment and a second bent segment, The battery module according to claim 8, characterized in that the first bent segment is connected to the base and the second bent segment, and the second bent segment is connected to the first connecting portion.
  10. The battery module according to claim 8 or 9, characterized in that the first bent segment and the base form a first angle A1 , and the second bent segment and the first connecting portion form a second angle B1 , wherein A1 ≥ B1 .
  11. The battery module according to claim 10, characterized in that the first bent segment and the second bent segment form a third angle C1 , and C1 > A1 .
  12. The battery module according to claim 11, characterized in that C1 = 2A1 = 2B1 .
  13. The housing comprises a first side wall, a second side wall, a top wall, and a bottom wall. The first side wall is connected to the top wall and the bottom wall, and the second side wall is connected to the top wall and the bottom wall, The first member, the housing, and the second member form a housing space. The battery module according to any one of claims 6 to 12, characterized in that the battery cell unit is installed within the housing space.
  14. The aforementioned battery module has a front wall, The housing comprises a first side wall, a second side wall, a top wall, and a bottom wall. The front wall is connected to the first side wall, the second side wall, the top wall, and the bottom wall. The first member and the front wall are provided along the first direction, and the first member, the front wall and the housing form a housing space. The battery module according to any one of claims 6 to 12, wherein the second member is located between the plurality of battery cell units and the front wall along the first direction, and the second member is located within the housing space.
  15. The first sealing portion includes a first connecting portion, a second connecting portion, and a third connecting portion. The second and third connecting portions are provided facing each other along the third direction, The second connection part is connected to the third connection part via the first connection part. The battery module according to any one of claims 1 to 14, characterized in that the bracket covers at least a portion of the second connection portion, the third connection portion, and the first connection portion.
  16. The bracket includes a second portion, a first side portion, and a second side portion. The second portion covers at least a part of the first connecting portion, The battery module according to claim 15, characterized in that the first side portion covers the second connection portion, and the second side portion covers the third connection portion.
  17. The battery module according to claim 16, characterized in that, when observed from the second direction, the second portion is located between the third wall and the fourth wall in the first direction.
  18. The battery module according to claim 16 or 17, characterized in that, when observed from the second direction, the first side portion is located between the third wall and the fourth wall in the first direction.
  19. The battery module according to any one of claims 16 to 18, characterized in that, when observed from the second direction, the second side portion is located between the third wall and the fourth wall in the first direction X.
  20. The battery module according to any one of claims 16 to 19, characterized in that, when observed from the first direction, a portion of the first connection portion is located between the main body portion and the first portion in the second direction, and between the first side portion and the second side portion in the third direction.

Description

This application relates to the field of batteries, and more specifically to battery modules and electrical equipment. Battery modules can have their lifespan increased by pressurized designs. Currently, this is achieved by filling the spaces between adjacent battery cells with elastic materials such as foam. However, filling with elastic materials occupies space, increases costs, and reduces the energy density of the battery module. This is a schematic diagram of an exploded view of a battery module according to several embodiments.This is a schematic diagram of a part of the structure of a battery module according to several embodiments.This is a schematic diagram of the structure of a battery cell unit according to several embodiments.This is a schematic diagram of the structure of a battery cell unit from a different perspective, relating to several embodiments.This is an enlarged schematic diagram of a portion of a battery cell unit in several embodiments.This is a schematic diagram of the battery cell configuration in several embodiments.This is a schematic diagram of the structure of a battery cell as viewed along the second direction Y in some embodiments.These are schematic diagrams of disassembled battery cells in several embodiments.This figure shows a schematic configuration of a battery cell in another embodiment.Furthermore, this is a schematic diagram of the battery cell structure as viewed along the second direction Y in another embodiment.Furthermore, this is a schematic diagram of the battery cell structure from a different perspective relating to another embodiment.These are schematic diagrams of the electrode assembly structure in several embodiments.These are schematic diagrams illustrating the structure of a battery cell and bracket in several embodiments.This is a schematic diagram of the structure of a battery cell and bracket from a different perspective, relating to several embodiments.This is a schematic diagram of the structure of a battery cell and bracket from a different perspective relating to several embodiments.This is a schematic diagram of the structure of a battery cell and bracket from yet another perspective relating to several embodiments.This is a schematic cross-sectional view along line A-A in Figure 13.Figure 13 is a schematic diagram of the structure of a battery cell and part of the bracket.Figure 13 is a schematic diagram of the battery cell and other parts of the bracket structure.This is a schematic diagram of a portion of the housing structure according to several embodiments.This is a schematic diagram of the structure of the second member in several embodiments.These are schematic diagrams illustrating the structure of electrical equipment in several embodiments. The following embodiments are illustrative and not restrictive, but are intended to provide a basic understanding of this application and do not confirm the essence or definitive elements of this application or limit the scope of protection. Unless there is a structural inconsistency, the technical features mentioned in each embodiment may be combined in any way. When one element is considered to be "provided" to another element, it may be directly provided to the other element or provided to the other element via another element. When one element is considered to be "connected" to another element, it may be directly connected to the other element or connected to the other element via another element. The terms "perpendicular" and "equal" are used to describe the ideal state between two parts. In actual manufacturing or use, two parts are approximately perpendicular or equal to each other. For example, numerically speaking, perpendicular means that the angle between two straight lines is within the range of 90° ± 10°, the dihedral angle between two planes is within the range of 90° ± 10°, or the angle between a straight line and a plane is within the range of 90° ± 10°. Two parts described as "perpendicular" do not necessarily have to be absolute straight lines or planes; they may be approximately straight lines or planes, but if their overall extension direction is a straight line or plane when viewed macroscopically, then the parts are considered "straight lines" or "planes." The term "parallel" is used to describe the ideal state between two parts. In actual manufacturing or use, two parts are approximately parallel to each other. For example, numerically speaking, parallel means that the angle between two straight lines is within the range of 180° ± 10°, the dihedral angle between two planes is within the range of 180° ± 10°, or the angle between a straight line and a plane is within the range of 180° ± 10°. Two parts described as "parallel" do not necessarily have to be absolute straight lines or planes; they may be approximately straight lines or planes. However, if the overall extension direction is a straight line or plane when viewed macroscopically, then the parts are considered "straigh