Battery modules and electrical equipment
The battery module design addresses sealing portion vulnerabilities by using a holder to provide expansion space and strengthen connections, improving sealing performance and heat dissipation, thus enhancing the battery's durability.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- XIAMEN AMPACK TECH LTD
- Filing Date
- 2023-03-31
- Publication Date
- 2026-04-23
AI Technical Summary
The sealing portions in battery cells are prone to damage, leading to leakage and compromised sealing performance due to low strength, which affects heat dissipation and pressure release.
A battery module design that includes a holder covering a portion of the sealing portion, providing an expansion space and enhancing protection, while also improving connection strength through integral molding and strategic positioning of the holder's components to reduce pressure impact and facilitate heat dissipation.
The design enhances the protection of the sealing portion, reduces the impact of internal pressure on sealing performance, and improves heat dissipation, thereby extending the service life of the battery cells.
Smart Images
Figure 2026513305000001_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of energy storage technologies, and particularly to battery modules and electrical equipment.
Background Art
[0002] In a battery module, a battery cell seals the battery cell case with a sealing portion. However, the strength of the sealing portion is low and it is easily damaged, thereby causing leakage from the battery cell and affecting the normal use of the battery cell. To strengthen the protection of the sealing portion, currently, usually, the entire sealing portion is covered with a holder or the sealing portion is protected by a casting adhesive. However, this not only affects the heat dissipation of the battery cell, but is also disadvantageous for the pressure release inside the battery cell and affects the sealing performance of the battery cell.
Summary of the Invention
Problems to be Solved by the Invention
[0003] In view of the above problems, it is necessary to provide a battery module and an electrical equipment that can protect the sealing portion, is advantageous for pressure release, and can reduce the influence on the sealing performance of the battery cell.
Means for Solving the Problems
[0004] Embodiments of this application provide a battery module comprising a plurality of battery cell units arranged along a first direction. Each battery cell unit comprises a battery cell and a holder. The battery cell comprises an electrode assembly, a battery cell case, and electrode terminals. The electrode terminals are connected to the electrode assembly and extend out of the battery cell case. The battery cell case comprises a body portion and a first seal portion. The first seal portion comprises a first connection portion, a first bend portion, and a second bend portion. The first connection portion connects the first bend portion and the second bend portion. The first bend portion and the second bend portion are arranged opposite each other along a third direction. The electrode terminals extend from the first connection portion to the battery cell case. The holder comprises a first portion, a first side portion, and a second side portion. The first portion covers a portion of the first connection portion. The first side portion covers the first bend portion. The second side portion covers the second bend portion. Observed from the first direction, in the second direction, a portion of the first connection is located between the main body and the first part, and in the third direction, a portion of the first connection is located between the first side and the second side. The first, second, and third directions are orthogonal to each other. Covering a portion of the first seal with the holder enhances protection of the first seal, and positioning a portion of the first connection between the main body and the first part, and between the first side and the second side, provides an expansion space for the first seal, which is advantageous for pressure release, reduces the impact on the first connection due to pressure inside the battery cell, and not only reduces the impact on the sealing performance of the first seal, but is also advantageous for heat dissipation of the first seal.
[0005] In some embodiments of this application, the holder includes a first extension, which extends from a first side. The main body includes a first side, and the first extension covers at least a portion of the first side, thereby protecting the main body and increasing the connection strength between the holder and the battery cell.
[0006] In some embodiments of this application, in the second direction, a first extension is provided on a portion of the first side and a portion of the second sealing portion, thereby protecting a portion of the main body, increasing the connection strength between the holder and the battery cell, and facilitating injection molding of the first extension.
[0007] In some embodiments of this application, in the second direction, the first side and the second sealing portion are both provided with a first extension, thereby providing better protection to the main body and better increasing the connection strength between the holder and the battery cell.
[0008] In some embodiments of this application, the holder includes a second extension, which extends from a second side. The main body includes a second side. The first and second sides are arranged opposite each other along a third direction. The second extension covers at least a portion of the second side, thereby protecting the main body and further increasing the connection strength between the holder and the battery cell.
[0009] In some embodiments of this application, in the second direction, a second extension is provided on a portion of the second side and a portion of the second seal, thereby protecting a portion of the main body, increasing the connection strength between the holder and the battery cell, and facilitating injection molding of the second extension.
[0010] In some embodiments of this application, in the second direction, the second side and the second sealing portion are both provided with a second extension, thereby providing better protection to the main body and better increasing the connection strength between the holder and the battery cell.
[0011] Selectively, in some embodiments of this application, the battery cell case includes two second sealing portions provided along a third direction. One second sealing portion is provided on a first side, and the other second sealing portion is provided on a second side. The first extension covers at least a portion of the second sealing portion. The second extension covers at least a portion of the other second sealing portion, thereby protecting the second sealing portion.
[0012] In some embodiments of this application, the main body includes a first wall. A first connector is connected to the first wall. The holder includes a second connector, which covers a portion of the first wall, thereby protecting the main body.
[0013] In some embodiments of this application, the holder optionally includes a second portion. Along a second direction, the second portion extends from the second connector, and the second portion and the first portion are arranged opposite each other along the second direction, with the second portion covering a portion of the first connector, thereby protecting the first connector.
[0014] Selectively, in some embodiments of this application, when viewed from a first direction, a portion of the first connection is located within a first space formed by the second connection, the first portion, the first side, and the second side, and the first portion, the first side, the second side, and the second connection protect the area around the first connection, thereby reducing the effect of battery cell expansion on the sealing performance of the first seal, while the first space can further dissipate heat from the battery cell.
[0015] Selectively, in some embodiments of this application, along the second direction, the projection of the electrode assembly is located between the first and second sides, and when it is necessary to release the internal pressure of the battery cell in a timely manner, by limiting the positions of the first and second sides, the battery cell can release the pressure by piercing through the first connection and part of the holder.
[0016] In some embodiments of this application, the holder is integrally molded with the battery cell, which is advantageous for improving the connection strength between the holder and the battery cell.
[0017] Selectively, in some embodiments of this application, the battery cell contains an electrolyte, some of which is free-flowing and adheres to the inner wall of the battery cell case and / or the electrode assembly.
[0018] In some embodiments of this application, the main body comprises a first case and a second case. The first case is provided with a first recess, and the second case is provided with a second recess. The first case is connected to the second case to form a housing space. Part of the electrode assembly is provided in the first recess, and part of it is provided in the second recess.
[0019] In some embodiments of this application, the main body comprises a first case and a second case. The first case is provided with a first recess, and the second case is flat. The first case is connected to the second case to form a housing space, and the electrode assembly is provided in the first recess.
[0020] Selectively, in some embodiments of this application, the battery cell case includes two first sealing portions. The two first sealing portions are provided along a second direction. The battery cell includes two electrode terminals, one of which extends from a first sealing portion into the battery cell case, and the other electrode terminal which extends from the other first sealing portion into the battery cell case.
[0021] Selectively, in some embodiments of this application, the battery cell includes two electrode terminals. The two electrode terminals extend from the same first seal portion into the battery cell case.
[0022] In some embodiments of this application, the main body includes a second wall, a third wall, and a fourth wall. The second wall and the first wall are provided along a second direction. The third wall and the fourth wall are provided along a first direction. When viewed from a direction opposite to the second direction, in the first direction, the second connection is located between the third wall and the fourth wall. When adjacent battery cell cases are connected in contact, a gap exists between adjacent second connection portions, which reduces the impact of the pressure applied to the second connection portion between adjacent cell cases, thereby reducing the force acting on the first seal portion, which is advantageous for protecting the first seal portion and is also advantageous for the stability of the holder in connecting the battery cells.
[0023] Selectively, in some embodiments of this application, the main bodies of adjacent battery cell cases are in contact and connected, which is advantageous for pressurizing the main body.
[0024] Selectively, in some embodiments of this application, pressure exists between the bodies of adjacent battery cell cases, and multiple battery cell units are under pressurized conditions, which is advantageous in extending the service life of the battery cell units.
[0025] In some embodiments of this application, a first gap is formed between adjacent first sides, and when adjacent battery cell cases are in contact and connected and pressure is applied to each other, the first gap between two adjacent first sides reduces the force acting on the first sides, and consequently reduces the force acting on the first seal, which is advantageous for protecting the first seal, and the first gap is also advantageous for heat dissipation of the battery cell.
[0026] In some embodiments of this application, a second gap is formed between adjacent second sides, and when adjacent battery cell cases are in contact and connected and apply pressure to each other, the second gap between two adjacent second sides reduces the force acting on the second sides, thus further reducing the force acting on the first seal, which is advantageous for protecting the first seal, and the second gap is also advantageous for heat dissipation of the battery cell.
[0027] Optionally, in some embodiments of the present application, when observed from the direction opposite to the second direction, in the first direction, the first side portion does not exceed the first extension portion, and the second side portion does not exceed the second extension portion. Thereby, the acting forces received by the first side portion and the second side portion can be reduced. Along with this, the acting force received by the first sealing portion can also be further reduced, which is advantageous for protecting the first sealing portion.
[0028] Optionally, in some embodiments of the present application, the holder includes an insulating holder, thereby reducing the risk of short - circuit between the holder and the battery cell.
[0029] Optionally, in some embodiments of the present application, the battery module further includes an elastic member. The elastic member is provided between the battery cell unit and the case. The elastic member can apply pressure to the plurality of battery cell units, and the plurality of battery cell units can be put into a pressurized state.
[0030] Optionally, in some embodiments of the present application, the first side portion covers a part of the first bending portion and the first connecting portion. Thereby, the connection location between the first bending portion and the first connecting portion can be protected, and the protection for the first sealing portion can be further strengthened.
[0031] Optionally, in some embodiments of the present application, the second side portion covers a part of the second bending portion and the first connecting portion. Thereby, the connection location between the second bending portion and the first connecting portion can be protected, and the protection for the first sealing portion can be further strengthened.
[0032] One embodiment of the present application further provides an electrical device, and the electrical device includes the battery module described in any of the above embodiments.
Advantages of the Invention
[0033] The above-mentioned battery module and electrical equipment enhance protection to the first seal portion by covering a portion of the first seal portion with a holder, and provide an expansion space to the first seal portion by installing a portion of the first connection portion between the main body portion and the first portion, and between the first side portion and the second side portion, which is advantageous for pressure release, reduces the impact on the first connection portion due to the pressure inside the battery cell, reduces the impact on the sealing performance of the first seal portion, and is also advantageous for heat dissipation of the first seal portion. [Brief explanation of the drawing]
[0034] [Figure 1] Schematic diagrams of partial structures of battery modules in several embodiments are shown. [Figure 2] Schematic diagrams of the battery cell structure from different perspectives in several embodiments are shown. [Figure 3] Schematic diagrams of battery cell structures in several embodiments are shown. [Figure 4] Schematic diagrams of the battery cell structure as observed from the direction Y' opposite to the second direction Y in several embodiments are shown. [Figure 5] The diagrams shown are schematic diagrams of disassembled battery cells in several embodiments. [Figure 6] Schematic diagrams of the battery cell as observed from the direction Y' opposite to the second direction Y, in several other embodiments, are shown. [Figure 7] Figure 6 shows a schematic diagram of the battery cell structure in the embodiment. [Figure 8] Furthermore, schematic diagrams of the battery cell structure in several other embodiments are shown. [Figure 9] Schematic diagrams of the battery cell and holder structure in several embodiments are shown. [Figure 10] Figure 9 shows a schematic diagram of the battery cell and holder from a different perspective in the embodiment shown. [Figure 11] Schematic diagrams of some partial structures in Figure 9 in several embodiments are shown. [Figure 12] Schematic diagrams of the battery cell and holder structure as observed from a second direction in several embodiments are shown. [Figure 13] Schematic cross-sectional views along line II-II in Figure 9 are shown in several embodiments. [Figure 14] Schematic diagrams of the partial structure of Figure 9 in several embodiments are shown. [Figure 15] Schematic cross-sectional views along line III-III in Figure 9 are shown in several embodiments. [Figure 16] The following are schematic diagrams of disassembled battery modules in several embodiments. [Figure 17] Schematic diagrams of the structure of electrical equipment in several embodiments are shown. [Modes for carrying out the invention]
[0035] The following specific embodiments are illustrative and not limiting, and are intended to provide a basic understanding of this application, not to define key elements or the scope of protection. Unless there is a structural inconsistency, the technical features mentioned in each embodiment can be combined in any manner.
[0036] When one component is considered to be "installed" on another component, it may be directly installed on top of the other component, or there may be an intermediate component. When one component is considered to be "connected" to another component, it may be directly connected to the other component, or there may be an intermediate component.
[0037] It is understood that the terms “perpendicular” and “equal” are used to describe an ideal state between two parts. In actual production or use, a state close to perpendicular or equal may exist between two parts. For example, combining numerical descriptions, perpendicular may mean that the angle range between two lines is between 90° ± 10°, perpendicular may mean that the angle range between the two faces of two planes is between 90° ± 10°, and perpendicular may mean that the angle range between a line and a plane is between 90° ± 10°. Two parts described as “perpendicular” do not have to be absolute lines or planes; they may be approximately lines or planes, and if the overall extension direction is a line or plane when viewed macroscopically, then the parts are considered to be “straight” or “plane”.
[0038] The term "parallel" is used to describe an ideal state between two parts. In actual production or use, a state close to parallel may exist between two parts. For example, combining numerical descriptions, parallel can mean that the angle range between two straight lines is between 180° ± 10°, parallel can mean that the angle range between the two faces of two planes is between 180° ± 10°, and parallel can mean that the angle range between a straight line and a plane is between 180° ± 10°. Two parts described as "parallel" do not have to be absolute straight lines or planes; they may be approximately straight lines or planes, and if the overall extension direction is straight or plane when viewed macroscopically, then the parts are considered "straight lines" or "planes."
[0039] Unless otherwise defined, the term “multiple” in this specification, when describing the quantity of parts, specifically refers to two or more parts.
[0040] The first direction X includes the first direction X and the direction opposite to the first direction X; the second direction Y includes the second direction Y and the direction opposite to the second direction Y; and the third direction Z includes the third direction Z and the direction opposite to the third direction Z.
[0041] To simplify the explanation, some of the electrode terminals 11c are not bent.
[0042] Referring to Figures 1 to 5 and Figures 9 to 10, one embodiment of the present application provides a battery module 100 comprising a plurality of battery cell units 10 arranged along a first direction X, each battery cell unit 10 comprising a battery cell 11 and a holder 12 connected to the battery cell 11. The battery cell 11 comprises a battery cell case 11a, an electrode assembly 11b, and an electrode terminal 11c connected to the electrode assembly 11b and extending out from the battery cell case 11a.
[0043] The battery cell case 11a comprises a main body portion 111 and a first sealing portion 112. The electrode assembly 11b is provided on the main body portion 111, and the main body portion 111 and the first sealing portion 112 are arranged along a second direction Y. The first sealing portion 112 comprises a first connecting portion 112a, a first bending portion 112b, and a second bending portion 112c. The first connecting portion 112a connects the first bending portion 112b and the second bending portion 112c. The first bending portion 112b and the second bending portion 112c are provided opposite each other along a third direction Z. The electrode terminal 11c extends from the first connecting portion 112a to the battery cell case 11a.
[0044] The holder 12 includes a first portion 121, a first side portion 122, and a second side portion 123. The first portion 121 covers a portion of the first connecting portion 112a, the first side portion 122 covers the first bent portion 112b, and the second side portion 123 covers the second bent portion 112c. When viewed from a first direction X, in the second direction Y, a portion of the first connecting portion 112a is located between the main body portion 111 and the first portion 121. In the third direction Z, a portion of the first connecting portion 112a is located between the first side portion 122 and the second side portion 123. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. By covering a portion of the first seal portion 112 with the holder 12, protection to the first seal portion 112 is enhanced. By positioning a portion of the first connection portion 112a between the main body portion 111 and the first portion 121, and between the first side portion 122 and the second side portion 123, an expansion space can be provided for the first seal portion 112, which is advantageous for pressure release. This reduces the impact on the first connection portion 112a due to the pressure inside the battery cell 11, decreases the impact on the sealing performance of the first seal portion 112, and is also advantageous for heat dissipation of the first seal portion 112.
[0045] In one embodiment, one end of the first portion 121 is connected to the first side portion 122 and the other end is connected to the second side portion 123, which can increase the structural strength of the holder 12 and is advantageous for protecting the first seal portion 112.
[0046] In one embodiment, along the second direction Y, the projection of the electrode assembly 11b is located between the projection of the first side portion 122 and the projection of the second side portion 123. When it is necessary to release the pressure inside the battery cell 11 in a timely manner, by limiting the positions of the first side portion 122 and the second side portion 123, the battery cell 11 can release the pressure by piercing the first connection portion 112a and a portion of the holder 12.
[0047] In one embodiment, the holder 12 is integrally molded with the battery cell 11, which is advantageous for improving the connection strength between the holder 12 and the battery cell 11. Selectively, the holder 12 is integrally molded with the battery cell 11 by low-pressure injection molding.
[0048] In one embodiment, the holder 12 includes an insulating holder, which can reduce the risk of short-circuiting between the holder 12 and the battery cell 11.
[0049] Referring to Figure 15, in one embodiment, the first side portion 122 covers a portion of the first bent portion 112b and the first connecting portion 112a, protecting the connection point between the first bent portion 112b and the first connecting portion 112a, and further enhancing protection for the first sealing portion 112.
[0050] In one embodiment, the second side portion 123 covers a portion of the second bent portion 112c and the first connecting portion 112a, protecting the connection point between the second bent portion 112c and the first connecting portion 112a, and further enhancing protection for the first sealing portion 112.
[0051] Referring to Figures 5 and 8, in one embodiment, the main body 111 is provided with a housing space, and the main body 111 includes a first case 111a and a second case 111b, the first case 111a is provided with a first recess 1111, and the second case 111b is provided with a second recess 1112. The first case 111a is connected to the second case 111b to form the housing space. Part of the electrode assembly 11b is provided in the first recess 1111, and part of it is provided in the second recess 1112. The periphery of the first case 111a extends outward to form a first extended edge 1113, and the periphery of the second case 111b extends outward to form a second extended edge 1114, and after the first case 111a is connected to the second case 111b, the first extended edge 1113 and the second extended edge 1114 are overlapped and sealed together.
[0052] In one embodiment, the first extended edge 1113 and the second extended edge 1114 are overlapped and sealed together to form two first seal portions 112 and two second seal portions 113. The two first seal portions 112 are provided along a second direction Y, and the two second seal portions 113 are provided along a third direction Z, with one first seal portion 112 connected to the two second seal portions 113, and the other first seal portion 112 connected to the two second seal portions 113.
[0053] Referring to Figure 3, selectively, the battery cell 11 includes two electrode terminals 11c, one electrode terminal 11c extending from one first seal portion 112 to the battery cell case 11a, and the other electrode terminal 11c extending from the other first seal portion 112 to the battery cell case 11a.
[0054] Referring to Figures 6 to 8, the battery cell 11 includes two electrode terminals 11c, and the two electrode terminals 11c extend from the same first seal portion 112 to the battery cell case 11a.
[0055] Referring to Figures 6 to 8, in one embodiment, the first extended edge 1113 and the second extended edge 1114 are overlapped and sealed together to form a first seal portion 112 and two second seal portions 113. The two second seal portions 113 are provided along a third direction Z, and the first seal portion 112 is connected to the two second seal portions 113.
[0056] Referring to Figures 6 to 8, in one embodiment, the battery cell 11 includes two electrode terminals 11c, the two electrode terminals 11c extending from the first seal portion 112 to the battery cell case 11a.
[0057] Referring to Figures 6 and 7, in one embodiment, the main body 111 is provided with a housing space, and the main body 111 includes a first case 111a and a second case 111b, the first case 111a is provided with a first recess 1111, and the second case 111b is flat. The first case 111a is connected to the second case 111b and forms the housing space. The electrode assembly 11b is provided in the first recess 1111.
[0058] Referring to Figures 3 and 9, in one embodiment, the main body 111 includes a first side 111c and a second side 111d provided along a third direction Z, with one second seal portion 113 provided on the first side 111c and the other second seal portion 113 provided on the second side 111d.
[0059] In one embodiment, the main body 111 includes a first wall 111e, a second wall 111f, a third wall 111g, and a fourth wall 111h. The second wall 111f and the first wall 111e are provided along a second direction Y, and the third wall 111g and the fourth wall 111h are provided along a first direction X. Selectively, the first seal portion 112 is connected to the first wall 111e. Selectively, one first seal portion 112 is connected to the first wall 111e, and the other first seal portion 112 is connected to the second wall 111f.
[0060] In one embodiment, the main body 111 includes two first walls 111e, a second wall 111f, and a first sealing portion 112. The main body 111 is provided with a housing space, and the main body 111 includes a first case 111a and a second case 111b, the first case 111a being provided with a first recess 1111, and the second case 111b being provided with a second recess 1112. The first case 111a is connected to the second case 111b, forming the housing space. The electrode assembly 11b is provided within the first recess 1111 and the second recess 1112. Two electrode terminals 11c extend from the same first sealing portion 112 to the battery cell case 11a. Selectively, there is one second wall 111f and one first seal portion 112, with one first wall 111e connected to the third wall 111g and the first seal portion 112, and the other first wall 111e connected to the fourth wall 111h and the first seal portion 112. When observed from a direction opposite to the second direction Y, in the first direction X, the two first walls 111e are located on opposite sides of the first seal portion 112. Selectively, there are two second walls 111f and two first seal portions 112, with one first wall 111e connected to the third wall 111g and the first seal portion 112, and the other first wall 111e connected to the fourth wall 111h and the first seal portion 112, and when viewed from the direction opposite to the second direction Y, in the first direction X, the two first walls 111e are connected to opposite sides of the first seal portion 112. One second wall 111f is connected to the third wall 111g and the other first seal portion 112, and the other second wall 111f is connected to the fourth wall 111h and the other first seal portion 112, and when viewed from the second direction Y, in the first direction X, the two second walls 111f are located on opposite sides of the first seal portion 112.
[0061] Referring to Figures 6 and 7, in one embodiment, the main body 111 includes one first wall 111e, one second wall 111f, and a first seal portion 112. The main body 111 is provided with a housing space, and the main body 111 includes a first case 111a and a second case 111b, the first case 111a is provided with a first recess 1111, and the second case 111b is flat. The first case 111a is connected to the second case 111b and forms the housing space. The electrode assembly 11b is provided in the first recess 1111. Two electrode terminals 11c extend from the same first seal portion 112 to the battery cell case 11a. Selectively, there is one first seal portion 112, where the first wall 111e is connected to the third wall 111g and the first seal portion 112, and the second wall 111f is connected to the third wall 111g. Selectively, there are two first seal portions 112, where the first wall 111e is connected to the third wall 111g and the first seal portion 112, and the second wall 111f is connected to the third wall 111g and the other first seal portion 112.
[0062] Referring to Figure 3, in one embodiment, the main body 111 includes two first walls 111e, two second walls 111f, and two first seal portions 112. One first wall 111e is connected to a third wall 111g and a first seal portion 112, and the other first wall 111e is connected to a fourth wall 111h and a first seal portion 112. One second wall 111f is connected to a third wall 111g and the other first seal portion 112, and the other second wall 111f is connected to a fourth wall 111h and the other first seal portion 112. One electrode terminal 11c extends from one first seal portion 112 to the battery cell case 11a, and the other electrode terminal 11c extends from the other first seal portion 112 to the battery cell case 11a.
[0063] When observed from direction Y' opposite to the second direction Y, in the first direction X, the two first walls 111e are connected to opposite sides of the first seal portion 112. When observed from the second direction Y, in the first direction X, the two second walls 111f are located on opposite sides of the second seal portion 113.
[0064] In one embodiment, the main body 111 includes one first wall 111e, one second wall 111f, and two first seal portions 112, wherein the first wall 111e is connected to a third wall 111g and a first seal portion 112, and the second wall 111f is connected to the third wall 111g and the other first seal portion 112. The main body 111 is provided with a housing space, and the main body 111 includes a first case 111a and a second case 111b, wherein the first case 111a is provided with a first recess 1111, and the second case 111b is flat. The first case 111a is connected to the second case 111b and forms the housing space. The electrode assembly 11b is provided in the first recess 1111. One electrode terminal 11c extends from one first seal portion 112 to the battery cell case 11a, and the other electrode terminal 11c extends from the other first seal portion 112 to the battery cell case 11a.
[0065] Referring to Figures 1 and 2, in one embodiment, adjacent main body portions 111 are connected in contact, which is advantageous for pressurizing the main body portion 111. Selectively, the third wall 111g of a battery cell case 11a is connected in contact with the fourth wall 111h of an adjacent battery cell case 11a. Selectively, the third wall 111g of a battery cell case 11a is connected in contact with the third wall 111g of an adjacent battery cell case 11a, and the fourth wall 111h of a battery cell case 11a is connected in contact with the fourth wall 111h of an adjacent battery cell case 11a.
[0066] In one embodiment, mutual pressure exists between adjacent battery cell cases 11a, and multiple battery cell units 10 are under pressurized conditions, which is advantageous in extending the service life of the battery cell units 10.
[0067] Referring to Figures 9 to 14, in one embodiment, the holder 12 includes a first extension 124, which extends from the first side portion 122 along a direction Y' opposite to the second direction Y, and the first extension 124 covers the first side edge 111c and the second seal portion 113, thereby protecting the main body portion 111 and the second seal portion 113, and increasing the connection strength between the holder 12 and the battery cell 11.
[0068] Selectively, in the second direction Y, a first extension portion 124 is provided on a part of the first side edge 111c and a part of the second sealing portion 113, thereby protecting a part of the main body portion 111 and a part of the second sealing portion 113, increasing the connection strength between the holder 12 and the battery cell 11, and facilitating the integral molding of the holder 12 with the battery cell 11.
[0069] Selectively, in the second direction Y, the entirety of the first side 111c and the entirety of the second sealing portion 113 are provided with a first extension portion 124, thereby further enhancing protection for the main body portion 111 and the second sealing portion 113, and further increasing the connection strength between the holder 12 and the battery cell 11.
[0070] In one embodiment, when observed from direction Y' opposite to the second direction Y, in the first direction X, the first side portion 122 does not extend beyond the first extension portion 124, and a first gap 122a is formed between adjacent first side portions 122. When adjacent battery cell cases 11a are in contact and connected and apply pressure to each other, the first gap 122a between two adjacent first side portions 122 can reduce the force acting on the first side portions 122, and consequently, the force acting on the first seal portion 112 can also be reduced, which is advantageous for protecting the first seal portion 112, and the first gap 122a is also advantageous for heat dissipation of the battery cell 11.
[0071] In one embodiment, the holder 12 includes a second extension 125 that extends from the second side portion 123 along a direction Y' opposite to the second direction Y, and the second extension 125 covers the second side portion 111d and the other second seal portion 113, thereby protecting the main body portion 111 and the other second seal portion 113, and further increasing the connection strength between the holder 12 and the battery cell 11. When viewed from the first direction X, in the third direction Z, the main body portion 111 is located between the first extension portion 124 and the second extension portion 125.
[0072] Selectively, in the second direction Y, a second extension portion 125 is provided on a part of the second side 111d and a part of the other second seal portion 113, thereby protecting a part of the main body portion 111 and a part of the second seal portion 113, increasing the connection strength between the holder 12 and the battery cell 11, and facilitating integral molding of the holder 12 with the battery cell 11.
[0073] Selectively, in the second direction Y, the entirety of the second side 111d and the entirety of the other second seal portion 113 are provided with a second extension portion 125, thereby providing better protection to the main body portion 111 and the second seal portion 113, and further improving the connection strength between the holder 12 and the battery cell 11.
[0074] In one embodiment, when observed from direction Y' opposite to the second direction Y, in the first direction X, the second side portion 123 does not extend beyond the second extension portion 125, and a second gap 123a is formed between adjacent second side portions 123. When adjacent battery cell cases 11a are in contact and connected and apply pressure to each other, the second gap 123a between two adjacent second side portions 123 can reduce the force acting on the second side portions 123, further reducing the force acting on the first seal portion 112, which is more advantageous for protecting the first seal portion 112, and the second gap 123a is also advantageous for heat dissipation of the battery cell 11.
[0075] Referring to Figures 1 and 9, in some embodiments, along a first direction X, the holder 12 includes a first protrusion 110 and a third recess 120, the third recess 120 being provided on a first extension 124, the first protrusion 110 extending from the first extension 124, and when the main body 111 of adjacent battery cells 11 are in contact and connected, the first protrusion 110 is provided within the third recess 120 of the adjacent holder 12, and a gap exists between the first protrusion 110 and the third recess 120. Positioning adjacent holders 12 by the third recess 120 and the first protrusion 110 reduces misalignment of adjacent main body 111, facilitates pressure between multiple main body 111, and the gap between the first protrusion 110 and the third recess 120 reduces the force received by the holder 12, improves protection of the first seal 112, and increases the connection strength between the holder 12 and the battery cell 11.
[0076] In some embodiments, along a first direction X, the holder 12 includes a second protrusion 130 and a fourth recess 140, the fourth recess 140 being provided on a second extension 125, and the second protrusion 130 extending from the second extension 125. When the bodies of adjacent battery cells 11 are in contact and connected, the second protrusion 130 is provided within the fourth recess 140 of the adjacent holder 12, and a gap exists between the second protrusion 130 and the fourth recess 140. The fourth recess 140 and the second protrusion 130 further position the adjacent holder 12, further reducing the misalignment of adjacent main bodies 111, further facilitating the pressure exerted by multiple main bodies 111 on each other, and the gap between the second protrusion 130 and the fourth recess 140 reduces the force received by the holder 12, further improving the protection of the first seal 112, and further increasing the connection strength between the holder 12 and the battery cell 11.
[0077] Referring to Figures 9 to 12, in one embodiment, the holder 12 includes a second connecting portion 126, which covers a portion of the first wall 111e, thereby protecting the main body 111. One end of the first portion 121 is connected to the first side portion 122 and the other end is connected to the second side portion 123, and one end of the second connecting portion 126 is connected to the first side portion 122 and the other end is connected to the second side portion 123, thereby further increasing the structural strength of the holder 12 and providing further advantages in protecting the first seal portion 112. A first space 12a is formed by the second connecting portion 126, the first portion 121, the first side portion 122 and the second side portion 123, and a portion of the first connecting portion 112a is located within the first space 12a. The first part 121, the first side part 122, the second side part 123, and the second connecting part 126 protect the area around the first connecting part 112a, thereby reducing the impact of the expansion of the battery cell 11 on the sealing performance of the first seal part 112, and the first space 12a can further dissipate heat from the battery cell 11.
[0078] In one embodiment, when observed from direction Y' opposite to the second direction Y, in the first direction X, the second connection portion 126 is located between the third wall 111g and the fourth wall 111h, the second connection portion 126 does not exceed the third wall 111g in the first direction X, and the second connection portion 126 does not exceed the fourth wall 111h in the first direction X. When adjacent battery cell cases 11a are in contact and connected, a gap exists between adjacent second connection portions 126, reducing the influence of the pressure applied to the second connection portion 126 between adjacent battery cell cases 11a, decreasing the force acting on the first seal portion 112, which is advantageous for protecting the first seal portion 112, as well as for the stability of the holder 12 connecting the battery cells 11.
[0079] In some embodiments, the main body 111 includes a plurality of first walls 111e, and the holder 12 includes a corresponding plurality of second connecting portions 126. Selectively, some of the first walls 111e are provided with second connecting portions 126. Selectively, each first wall 111e is provided with one second connecting portion 126.
[0080] Referring to Figures 9 to 13, in one embodiment, the holder 12 includes a second portion 127, which is connected to the side of the second connector 126 facing the first portion 121. The second portion 127 extends from the second connector 126 along a second direction Y, and covers a portion of the first connector 122a. The second portion 127 can support and protect the portion of the first seal 112 that protrudes from the second connector 126, reducing the risk of the first seal 112 being damaged and affecting the sealing of the battery cell 11.
[0081] In some embodiments, the main body 111 includes a plurality of first walls 111e, and the holder 12 includes a plurality of second parts 127 and a plurality of second connectors 126. Selectively, some of the second parts 127 are connected to the second connectors 126. Selectively, each second part 127 is connected to one second connector 126.
[0082] In one embodiment, the battery cell 11 contains an electrolyte, which is provided within the battery cell case 11a. The electrode assembly 11b includes a first electrode plate, a diaphragm, and a second electrode plate, which is formed by winding or stacking the first electrode plate, diaphragm, and second electrode plate. Some of the electrolyte is used to permeate the first electrode plate, diaphragm, and second electrode plate and conduct ions, while some of the electrolyte is free and adheres to the surface of the battery cell case 11a and / or the surface of the electrode assembly 11b. The free electrolyte is the free electrolyte. When multiple battery cells 11 are in a cycling process, the free electrolyte within the battery cells 11 is compressed, and the present invention provides an expansion space in the first seal portion 112 by the first space 12a, thereby reducing the effect of the expansion of the battery cells 11 on the sealing performance of the first seal portion 112.
[0083] Referring to Figures 9 to 14, in one embodiment, the battery cell unit 10 includes two holders 12, one holder 12 connected to a portion of a first seal portion 112, and the other holder 12 connected to a portion of the other first seal portion 112. One electrode terminal 11c protrudes from the first seal portion 112 and holder 12 along a second direction Y, and the other electrode terminal 11c protrudes from the second seal portion 113 and holder 12 along a direction opposite to the second direction Y.
[0084] The two holders 12 increase protection for the first seal portion 112 and the second seal portion 113, provide expansion space for the first seal portion 112, reduce the effect of gas generation and / or free electrolyte within the battery cell 11 on the sealing performance of the first seal portion 112, and are advantageous for heat dissipation of the first seal portion 112.
[0085] Referring to Figure 16, in one embodiment, the battery module 100 further includes a case 20, and the battery cell unit 10 is housed inside the case 20, and when the battery cell unit 10 is housed inside the case 20, it is under pressurized conditions.
[0086] In one embodiment, the battery module 100 further includes an elastic member 30, which is provided between the battery cell unit 10 and the case 20, and the elastic member 30 can apply pressure to the multiple battery cell units 10, thereby pressurizing the multiple battery cell units 10.
[0087] Referring to Figure 17, this application further provides an electrical device 200 employing the battery module 100 described above. In one embodiment, the electrical device 200 of this application may be, but is not limited to, an electronic device, a drone, a backup power supply, an electric vehicle, an electric motorcycle, an electric assist bicycle, a power tool, a large household battery storage module, etc.
[0088] A person ordinary in the art should understand that the above embodiments are for illustrative purposes only and not to limit the present application, and any appropriate modifications and changes to the above embodiments within the substantial spirit of the present application are included within the scope of publication of this application. [Explanation of Symbols]
[0089] 100 Battery Modules 10 battery cells 11 battery cells 11a Core Case 11b Electrode Assembly 11c electrode terminal 111 Main body 111a Case 1 1111 First recess 111b Case 2 111c 1st side 111d 2nd side 111e 1st wall 111f 2nd wall 111g 3rd wall 111h 4th wall 1112 Second recess 1113 1st extension side 1114 2nd extension side 112 First seal section 112a First connection section 112b First folding section 112c Second folding section 113 Second seal section 12 holders 121 Part 1 122 First side 122a 1st gap 123 Second side 123a 2nd gap 124 1st extension section 125 2nd extension section 126 Second connection section 127 Part 2 110 First protrusion 120 Third recess 130 Second protrusion 140 Fourth recess 20 cases 30 Elastic parts 200 Electrical equipment. X 1st direction Y Second direction Z 3rd direction
Claims
1. It comprises multiple battery cell units arranged along a first direction, Each of the aforementioned battery cell units includes a battery cell and a holder, The battery cell includes an electrode assembly, a battery cell case, and electrode terminals, the electrode terminals being connected to the electrode assembly and extending out from the battery cell case. The aforementioned battery cell case includes a main body and a first sealing portion. The electrode module is provided in the main body, The first sealing portion includes a first connecting portion, a first bending portion and a second bending portion, and the first connecting portion connects the first bending portion and the second bending portion. The first and second bent portions are provided opposite each other along the third direction, and the electrode terminals extend from the first connection portion to the battery cell case. The holder includes a first portion, a first side portion, and a second side portion, the first portion covering a portion of the first connecting portion, the first side portion covering the first bent portion, the second side portion covering the second bent portion, and the electrode terminal protruding from the first portion. Observed from the first direction, in the second direction, a part of the first connecting portion is located between the main body and the first portion, and in the third direction, a part of the first connecting portion is located between the first side and the second side. A battery module characterized in that the first direction, the second direction, and the third direction are perpendicular to each other.
2. The battery module according to claim 1, characterized in that the holder includes a first extension portion, the first extension portion extends from the first side portion, the main body includes a first side edge, and the first extension portion covers at least a portion of the first side edge.
3. The battery module according to claim 2, wherein the holder includes a second extension portion, the second extension portion extends from the second side portion, the main body includes a second side edge, the first side edge and the second side edge are provided facing each other along the third direction, and the second extension portion covers at least a portion of the second side edge.
4. The battery cell case includes two second sealing portions provided along the third direction, one of which is provided on the first side and the other second sealing portion is provided on the second side. The battery module according to claim 3, characterized in that the first extension portion covers at least a part of the second sealing portion, and the second extension portion covers at least a part of the other second sealing portion.
5. The battery module according to claim 3, characterized in that, when observed from a direction opposite to the second direction, in the first direction, the first side portion does not exceed the first extension portion, and the second side portion does not exceed the second extension portion.
6. The battery module according to any one of claims 1 to 5, wherein the main body includes a first wall, the first connecting portion is connected to the first wall, and the holder includes a second connecting portion, the second connecting portion covers a part of the first wall.
7. The battery module according to claim 6, wherein the holder includes a second portion, the second portion extends from the second connection portion along the second direction, the second portion and the first portion are arranged opposite each other along the second direction, and the second portion covers a portion of the first connection portion.
8. The battery module according to claim 6 or 7, characterized in that, when observed from the first direction, a part of the first connection portion is located within a first space formed by being surrounded by the second connection portion, the first portion, the first side portion, and the second side portion.
9. The battery module according to any one of claims 1 to 8, characterized in that, along the second direction, the projection of the electrode assembly is located between the projection of the first side and the projection of the second side.
10. The battery module according to any one of claims 1 to 9, characterized in that the holder is integrally molded with the battery cell.
11. The battery module according to any one of claims 1 to 10, wherein the battery cell contains an electrolyte, and a portion of the electrolyte is in a free state attached to the inner wall of the battery cell case and / or the electrode assembly.
12. The battery module according to any one of claims 1 to 11, wherein the main body includes a first case and a second case, the first case is provided with a first recess, the second case is provided with a second recess, the first case is connected to the second case and forms a housing space, a part of the electrode assembly is provided in the first recess, and a part of the electrode assembly is provided in the second recess.
13. The battery module according to any one of claims 1 to 11, wherein the main body includes a first case and a second case, the first case is provided with a first recess, the second case is flat, the first case is connected to the second case and forms a housing space, and the electrode assembly is provided in the first recess.
14. The battery module according to any one of claims 1 to 13, wherein the battery cell case includes two first sealing portions, the two first sealing portions are provided along the second direction, and the battery cell includes two electrode terminals, one of which extends from the first sealing portion to the battery cell case, and the other electrode terminal extends from the other first sealing portion to the battery cell case.
15. The battery module according to any one of claims 1 to 13, characterized in that the battery cell includes two electrode terminals, and the two electrode terminals extend from the same first seal portion to the battery cell case.
16. The battery module according to claim 6, wherein the main body includes a second wall, a third wall, and a fourth wall, the second wall and the first wall are provided along the second direction, the third wall and the fourth wall are provided along the first direction, and when viewed from a direction opposite to the second direction, the second connection portion is located between the third wall and the fourth wall in the first direction.
17. The battery module according to any one of claims 1 to 16, characterized in that the main bodies of adjacent battery cell cases are connected in contact.
18. The battery module according to any one of claims 1 to 17, characterized in that pressure exists between the main bodies of adjacent battery cell cases.
19. The battery module according to any one of claims 1 to 18, characterized in that a first gap is formed between adjacent first side portions.
20. The battery module according to claim 19, characterized in that a second gap is formed between adjacent second side portions.
21. The battery module according to any one of claims 1 to 20, characterized in that the holder includes an insulating holder.
22. An electrical device comprising a battery module according to any one of claims 1 to 21.