Battery module, electrical connection assembly, battery pack, and electrical device

Abstract

The present disclosure provides a battery module, an electrical connection assembly, a battery pack and an electrical equipment. The battery module comprises a battery pack and an electrical connection assembly. The battery pack comprises a plurality of rows of batteries arranged in a first direction and adjacent in a second direction perpendicular to the first direction. The electrical connection assembly is arranged at one end side of the battery pack. The electrical connection assembly comprises a holder, an electrical connection component group and an adhesive component. The electrical connection component group is fixed to the holder and comprises a plurality of rows of electrical connection components arranged in the first direction and spaced apart and adjacent in the second direction, each electrical connection component being connected to at least two batteries to electrically connect the at least two batteries. The adhesive component is arranged between two adjacent rows of electrical connection components and adheres the holder to an end surface of the battery pack. Accordingly, during welding, the position of the electrical connection assembly relative to the battery pack does not deviate, which helps to improve the welding effect between the electrical connection assembly and the battery pack.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, specifically to a battery module, an electrical connection component, a battery pack, and an electrical device having the battery module or battery pack. Background Technology

[0002] Battery modules are crucial energy storage components used to store or output electrical energy. A battery module typically consists of a battery pack and electrical connection components. These connection components are welded to the battery pack to establish electrical connections between the individual batteries. However, during the welding process, factors such as mechanical vibration or stress can easily cause the electrical connection components to shift, reducing the welding effectiveness. In particular, when the battery pack is welded to the connection components in a horizontal position, gravity or insufficient structural support can also cause positional shifts during welding. This can cause the connection components to deviate from their target welding position, affecting the welding outcome. Utility Model Content

[0003] In view of this, the present invention provides a battery module, an electrical connection component, a battery pack, and an electrical device having the battery module or battery pack, so as to at least solve or improve the problem of poor welding effect between the battery pack and the electrical connection component.

[0004] On one hand, this disclosure provides a battery module. The battery module includes a battery pack and an electrical connection assembly. The battery pack includes multiple rows of batteries, each row including a plurality of batteries arranged in a first direction, and each row of batteries being adjacent to another row of batteries in a second direction perpendicular to the first direction. The electrical connection assembly is disposed on one end of the battery pack. The electrical connection assembly includes a retainer, an electrical connector assembly, and an adhesive member. The electrical connector assembly is fixed to the retainer and includes multiple rows of electrical connectors, each row including a plurality of electrical connectors spaced apart in the first direction, each row of electrical connectors being adjacent to another row of electrical connectors in the second direction, and each electrical connector connecting to at least two batteries to electrically connect at least two batteries. The adhesive member is disposed between two adjacent rows of electrical connectors, bonding the retainer to the end face of the battery pack.

[0005] On the other hand, this disclosure also provides an electrical connection assembly. The electrical connection assembly includes a retainer, an electrical connector group, and an adhesive member. The electrical connector group is fixed to the retainer and includes multiple rows of electrical connectors. Each row of electrical connectors includes a plurality of electrical connectors spaced apart in a first direction. Each row of electrical connectors is adjacent to another row of electrical connectors in a second direction perpendicular to the first direction. Each electrical connector is adapted to connect to at least two batteries of a battery pack to electrically connect at least two batteries. The adhesive member is disposed between two adjacent rows of electrical connectors and fixed to the retainer to be adapted to bond the retainer to an end face of the battery pack.

[0006] On the other hand, this disclosure provides a battery pack. The battery pack includes a battery module according to the above aspects.

[0007] On the other hand, this disclosure provides an electrical appliance. The electrical appliance includes a battery pack according to the above aspects.

[0008] In this disclosure, an adhesive component is provided between two adjacent rows of electrical connectors. This adhesive component bonds the retainer to the end face of the battery pack, thereby achieving reliable positioning between the electrical connector assembly and the battery pack. This ensures that the position of the electrical connector assembly relative to the battery pack will not shift during the welding process, which helps improve the welding effect between the electrical connector assembly and the battery pack. Attached Figure Description

[0009] It should be understood that the following figures only show some embodiments of the present invention and should not be regarded as a limitation on the scope.

[0010] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0011] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0012] Figure 1 This is a schematic diagram of the structure of a battery module according to an embodiment of the present disclosure.

[0013] Figure 2 for Figure 1 An exploded view of the battery pack and electrical connection components of the battery module.

[0014] Figure 3 for Figure 2 A schematic diagram of the battery pack structure.

[0015] Figure 4 for Figure 2 A schematic diagram of the electrical connection components in the diagram.

[0016] Figure 5 for Figure 4 An exploded view of the electrical connection components.

[0017] Figure 6 for Figure 4 The diagram shows the electrical connection assembly facing the battery pack.

[0018] Figure 7 for Figure 1 A partial structural diagram of the bonding between the middle adhesive component and the end face of the battery pack.

[0019] Figure 8 for Figure 3 A schematic diagram of the structure of a single cell in the battery pack.

[0020] Figure 9 for Figure 5 A schematic diagram of the structure of the electrical connector in the electrical connection assembly.

[0021] Figure 10 for Figure 1 A schematic diagram of the structure of a single electrical connector welded together from two batteries in the battery module.

[0022] Figure 11 for Figure 1 A partial structural diagram of the battery module.

[0023] Figure 12 A schematic diagram of the structure of an electrical connection assembly according to another embodiment of the present disclosure shows the side of the electrical connection assembly facing the battery pack.

[0024] Figure 13 This is a partial structural schematic diagram of a battery module according to yet another embodiment of the present disclosure.

[0025] Figure 14 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present disclosure.

[0026] Figure 15 This is a schematic diagram of the structure of an electrical device according to an embodiment of the present disclosure. Detailed Implementation

[0027] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0028] <Example Battery Module>

[0029] According to an embodiment of the present disclosure, a battery module 100 is provided. Figure 1 As shown below. For ease of understanding, the overall structure of the battery module 100 will be illustrated with an example below. It should be noted that the structure of the battery module 100 should not be limited to the description below. For example, one or more elements mentioned below may be omitted or replaced, and their layout relationships may be changed.

[0030] refer to Figure 1 and Figure 2 The battery module 100 may include a battery pack 101 and an electrical connection assembly 102.

[0031] refer to Figure 3The battery pack 101 may include multiple rows of batteries 10, each row of batteries 10 may include multiple batteries 10 arranged in a first direction, and each row of batteries 10 is adjacent to another row of batteries 10 in a second direction perpendicular to the first direction. For ease of understanding, in the accompanying drawings of this disclosure, the first direction is indicated by arrow X, and the second direction is indicated by arrow Y.

[0032] refer to Figure 1 and Figure 2 An electrical connection assembly 102 is located at one end of the battery pack 101, enabling electrical connection of multiple batteries 10 within the battery pack 101. Figure 4 and Figure 5 The electrical connection assembly 102 may include a retainer 20 and an electrical connector assembly 30. The electrical connector assembly 30 is secured to the retainer 20. In one example, the retainer 20 and the electrical connector assembly 30 may be secured by snap-fit. In another example, the retainer 20 and the electrical connector assembly 30 may be secured together by injection molding or vacuum forming.

[0033] The electrical connector assembly 30 includes multiple rows of electrical connectors 31, each row comprising a plurality of electrical connectors 31 spaced apart in a first direction, and each row of electrical connectors 31 adjacent to another row of electrical connectors 31 in a second direction. Each electrical connector 31 is connected to at least two batteries 10 to electrically connect at least two batteries 10. Specifically, the multiple rows of electrical connectors 31 may each correspond to a multiple row of batteries 10, and each electrical connector 31 may be used to electrically connect two adjacent batteries 10 in a corresponding row. In one example, each electrical connector 31 may be soldered to at least two batteries 10 to electrically connect at least two batteries 10. In another example, each electrical connector 31 may be riveted to at least two batteries 10 to electrically connect at least two batteries 10.

[0034] In this disclosure, only the example of welding each electrical connector 31 to at least two batteries 10 to electrically connect at least two batteries 10 is used. When welding the battery pack 101 to the electrical connection assembly 102, the relative positioning of the two is difficult and positional displacement is prone to occur, which degrades the welding effect. In particular, when the battery pack 101 is welded to the electrical connection assembly 102 in a lying position, positional displacement is more likely to occur during welding due to gravity or insufficient structural support.

[0035] Therefore, refer to Figure 4 and Figure 5 The electrical connection assembly 102 may also include an adhesive 40, which is disposed between two adjacent rows of electrical connectors 31 and fixed to the retainer 20, and adhesively attaches the retainer 20 to the end face of the battery pack 101.

[0036] According to the battery module 100 provided in this disclosure, an adhesive 40 is provided between two adjacent rows of electrical connectors. The adhesive 40 bonds the retainer 20 to the end face of the battery pack 101, thereby achieving reliable positioning between the electrical connector assembly 102 and the battery pack 101. In this way, the position of the electrical connector assembly 102 relative to the battery pack 101 will not shift during the welding process, which helps to improve the welding effect between the electrical connector assembly 102 and the battery pack 101.

[0037] refer to Figure 6 The overall dimension of two adjacent rows of electrical connectors 31 in the second direction is D, in mm. The dimension of the adhesive component 40 located between two adjacent rows of electrical connectors in the second direction is d, in mm. The ratio d / D should satisfy: 0.02 ≤ d / D ≤ 0.2. Preferably, the ratio d / D can range from 0.04 to 0.18. More preferably, it can range from 0.06 to 0.16. Alternatively, it can be 0.08, 0.1, 0.12, and 0.14.

[0038] The ratio of d to D should not be too small. If it is too small, the width of the adhesive component 40 will be too small, resulting in poor adhesion between the retainer 20 and the end face of the battery pack 101. This ratio should also not be too large. If it is too large, the space left for the electrical connector 31 will be too small, meaning the size of a single electrical connector 31 will be too small. This will lead to poor current carrying capacity of the electrical connector 31, resulting in increased resistance and localized overheating. Within the ratio range of 0.02 ≤ d / D ≤ 0.2, there is a good adhesion between the retainer 20 and the end face of the battery pack 101, and the size of a single electrical connector 31 is relatively large. This ensures both good welding between the electrical connector 31 and the battery pack 101 and sufficient current carrying capacity for the electrical connector 31.

[0039] Continue to refer to Figure 6 In a specific example, the adhesive 40 is a strip-shaped connector that extends continuously along a first direction.

[0040] When the adhesive 40 extends continuously along the first direction, the adhesive area is larger and the adhesion is more reliable, which helps the electrical connector 31 to obtain a larger size, thereby improving the current carrying capacity of the electrical connector 31.

[0041] In another embodiment, reference Figure 12 The adhesive component 40 may further include a plurality of adhesive segments arranged at intervals along a first direction, wherein the ratio d / D satisfies: 0.04 ≤ d / D ≤ 0.2. Preferably, the ratio d / D can range from 0.06 to 0.18. More preferably, it can range from 0.08 to 0.16. Alternatively, it can also be 0.1, 0.12, and 0.14.

[0042] When the adhesive component 40 comprises multiple adhesive segments, i.e., the adhesive component 40 extends discontinuously along the first direction, it allows the electrical connector 31 to be connected across rows in the middle of the battery pack. However, the discontinuity of the adhesive component 40 reduces the reliability of the bond, requiring the adhesive component to have a larger width to ensure the reliability of the bond. Therefore, d / D should be required to have a relatively large ratio, i.e., 0.04-0.2 should be closer to the upper limit of 0.02-0.2, to ensure that the position of the electrical connector assembly 102 relative to the battery pack 101 does not shift, thereby ensuring a good welding effect.

[0043] Each bonded segment may have the same or different dimensions in the second direction. (Refer to the reference.) Figure 12 In one example, the dimension of each adhesive segment in the first direction is z (in mm), and the sum of the dimensions of multiple adhesive segments in the first direction is w (in mm). The dimension of the electrical connection assembly 102 in the first direction is L, and the ratio w / L satisfies: 0.3 ≤ w / L ≤ 0.75. Preferably, the ratio w / L can range from 0.35 to 0.7. More preferably, it can be from 0.4 to 0.65. Alternatively, it can also be 0.45, 0.5, 0.55, and 0.6.

[0044] A w / L ratio that is too high will result in multiple bonded segments being too close together along the first direction, increasing the amount of adhesive used in the bonded part 40 and thus increasing costs. A w / L ratio that is too low will result in multiple bonded segments being too close together along the first direction, thus leading to insufficient bond strength.

[0045] The adhesive component 40 needs to have suitable adhesive strength. In one example, the adhesive strength of the adhesive component 40 can be γ, in N / cm². 2 The value of γ ranges from 1.5 N / cm. 2 ≤γ≤6N / cm 2 Preferably, the value of γ can be in the range of 2 N / cm. 2 up to 5.5 N / cm 2 More preferably, it can be 2.5 N / cm. 2 Up to 5N / cm 2 Alternatively, it can be 3N / cm. 2 3.5 N / cm 2 4N / cm 2 and 4.5 N / cm 2 .

[0046] The bonding effect between the retainer 20 and the end face of the battery pack 101 is affected by the bonding strength of the adhesive component 40. If the bonding strength of the adhesive component 40 is too low, the electrical connection assembly 102 will not bond firmly to the end face of the battery pack 101. If the bonding strength of the adhesive component 40 is too high, it will increase the difficulty of assembly, especially the difficulty of adjusting for assembly misalignment and disassembly. (At 1.5 N / cm) 2 ≤γ≤6N / cm 2 Under these conditions, the adhesive 40 has a suitable adhesive strength, which can ensure reliable bonding between the battery pack 101 and the electrical connection assembly 102, and also ensure that assembly is relatively convenient.

[0047] refer to Figure 4 In the current example, the electrical connection assembly 102 may consist of only two rows of electrical connectors. In this case, the ratio d / D satisfies: 0.04 ≤ d / D ≤ 0.2. Preferably, the ratio d / D can range from 0.06 to 0.18. More preferably, it can be from 0.08 to 0.16. Alternatively, it can also be 0.1, 0.12, and 0.14.

[0048] When the electrical connection assembly 102 includes only two rows of electrical connectors, it has two main drawbacks: firstly, it only has one adhesive component 40; secondly, its aspect ratio is larger. Both of these factors place higher demands on the reliability of the adhesive bonding. Therefore, in the current embodiment, the d / D ratio is larger, i.e., it satisfies: 0.04 ≤ d / D ≤ 0.2, thereby ensuring a reliable connection between the battery pack 101 and the electrical connection assembly 102.

[0049] In another possible example, the electrical connection assembly 102 may further include at least three rows of electrical connectors, with adhesive members 40 provided between any two adjacent rows of electrical connectors. In this case, the ratio d / D can satisfy: 0.02 ≤ d / D ≤ 0.16. Preferably, the ratio d / D can range from 0.04 to 0.14. More preferably, it can be from 0.06 to 0.12. Alternatively, it can also be 0.08 and 0.1.

[0050] When the electrical connection assembly 102 includes at least three rows of electrical connectors, it has both the advantage of having multiple adhesive members 40 and a smaller aspect ratio, both of which ensure the reliability of the adhesive bonding. Therefore, in this embodiment, the ratio d / D can be smaller, i.e., satisfying: 0.02≤d / D≤0.16.

[0051] In one specific embodiment, reference Figure 8Battery 10 is a cylindrical battery, and the ratio d / D satisfies: 0.03 ≤ d / D ≤ 0.2. Preferably, the ratio d / D can range from 0.05 to 0.18. More preferably, it can range from 0.07 to 0.16. Alternatively, it can also be 0.09, 0.1, 0.13, and 0.15.

[0052] Since the end face of the cylindrical battery has a smaller bonding area with the adhesive 40, in order to ensure that the end face of the battery pack 101 is bonded to the cage 20 firmly enough, the adhesive 40 should have a larger width, and the value of d / D should be slightly larger, that is, satisfying 0.03≤d / D≤0.2.

[0053] It is understood that battery 10 is not limited to a cylindrical battery. In another possible example, battery 10 could also be a prismatic battery.

[0054] Further, refer to Figure 7 Each battery has a radius of r (in mm), and the dimension of the portion of each battery end face bonded to the adhesive component in the second direction is a (in mm). The ratio a / r satisfies: 0.15 ≤ a / r ≤ 0.35. Preferably, the ratio a / r can range from 0.17 to 0.33. More preferably, it can range from 0.19 to 0.31. Alternatively, it can also be 0.21, 0.23, 0.26, 0.28, and 0.3.

[0055] A larger a / r ratio, meaning a smaller radius of battery 10 and a wider adhesive 40, results in a smaller dimension of electrical connector 31 in the second direction, leading to insufficient current carrying capacity of electrical connector 31. Conversely, a smaller a / r ratio, meaning a larger radius of battery 10 and a narrower adhesive 40, results in a larger dimension of electrical connector 31 in the second direction, leading to weak adhesion.

[0056] refer to Figure 8 , Figure 9 and Figure 10 Each battery 10 has a top surface 11 and a terminal post 12 protruding from the top surface 11 on the side facing the electrical connection assembly 102. To ensure better contact between the electrical connector 31 and the end face of the battery 10, there is a better electrical connection between at least two batteries 10, improving the welding effect. Each electrical connector 31 has an end face connection portion 311 and a terminal post connection portion 312 protruding beyond the end face connection portion 311 on the side facing away from the battery pack 101. The end face connection portion 311 of each electrical connector 31 is welded to the top surface 11 of one of the two adjacent batteries 10 to form two welding points, and the terminal post connection portion 312 of the electrical connector 31 is welded to the terminal post 12 of the other of the two adjacent batteries 10 to form one welding point.

[0057] refer to Figure 11The adhesive 40 is bonded to the end faces of two adjacent rows of batteries, which are staggered in the first direction, with a ratio d / D satisfying: 0.03 ≤ d / D ≤ 0.15. Preferably, the ratio d / D can range from 0.05 to 0.13. More preferably, it can range from 0.07 to 0.11. Alternatively, it can be 0.09.

[0058] When adjacent rows of batteries are staggered in the first direction, the spacing between adjacent rows of cylindrical batteries is more compact, and the spacing h between adjacent rows of electrical connectors is smaller (h is in mm). Even with a smaller width of adhesive 40, a larger area can be bonded to each battery. However, the space left for electrical connectors 31 is smaller. To ensure a firm bond between adhesive 40 and the battery end face while maintaining a good welding effect between electrical connectors 31 and the battery end face, the value of d / D should be slightly smaller, i.e., satisfying: 0.03 ≤ d / D ≤ 0.15.

[0059] In another example, refer to Figure 13 The adhesive 40 is bonded to the end faces of two adjacent rows of batteries, which are aligned in the first direction, and the ratio d / D satisfies: 0.03 ≤ d / D ≤ 0.18. Preferably, the ratio d / D can range from 0.05 to 0.16. More preferably, it can range from 0.07 to 0.14. Alternatively, it can also be 0.09, 0.11, and 0.13.

[0060] When two adjacent rows of batteries are aligned in the first direction, the spacing between adjacent rows is large, the bonding area of ​​the adhesive 40 on each battery is small, and the space left for the electrical connector 31 is large. To ensure both the welding effect between the electrical connector 31 and the battery end face and the strong adhesion between the adhesive 40 and the battery end face, the adhesive 40 needs to have a large width. Furthermore, in the current embodiment, the spacing h between adjacent rows of electrical connectors is large, allowing the adhesive 40 to have a large dimension d in the second direction. Therefore, the value of d / D should be slightly larger, i.e., satisfying: 0.03 ≤ d / D ≤ 0.18.

[0061] <Example Battery Pack>

[0062] According to an embodiment of the present disclosure, a battery pack 200 is in Figure 14 The following is an example illustrating the overall structure of the battery pack 200. It should be noted that the structure of the battery pack 200 is not limited to the description below. For example, one or more elements mentioned below may be omitted or replaced, and their layout relationships may be altered.

[0063] like Figure 13As shown, the battery pack 200 may include a battery housing 201, a battery housing top cover 202, battery modules 100, and a battery management system 300. Multiple battery modules 100 may be present and electrically connected to each other. The battery housing 201 houses the battery modules 100 and the battery management system 300, with the battery modules 100 electrically connected to the battery management system 300 to enable the charging and discharging process of the battery modules 100. The battery housing 201 and battery housing top cover 202 serve as external protective structures, typically made of metal or composite materials, and possess waterproof, dustproof, and impact-resistant properties, providing a safe operating environment for the internal components such as the battery modules 100 and the battery management system 300.

[0064] <Example Electrical Equipment>

[0065] According to an embodiment of the present disclosure, an electrical appliance 1000 is... Figure 15 The following is an example illustrating the overall structure of the electrical equipment 1000. It should be noted that the structure of the electrical equipment 1000 should not be limited to the description below. For example, one or more elements mentioned below may be omitted or replaced, and their layout relationships may be altered.

[0066] like Figure 14 As shown, the electrical device 1000 may include a battery pack 200. The electrical device 1000 may be a device that requires a power supply, such as a new energy vehicle, an energy storage system, or an industrial device. By way of example only, the battery module 100 or the battery pack 200 may be detachably fixed in the chassis of the new energy vehicle and electrically connected to the new energy vehicle to provide a stable and reliable power output for the new energy vehicle.

[0067] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0068] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0069] The basic principles of this utility model have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this utility model are merely examples and not limitations, and should not be considered as essential features of each embodiment of this utility model. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the utility model from being implemented using the aforementioned specific details.

[0070] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A battery module, characterized in that, include: A battery pack includes multiple rows of batteries, each row of batteries including multiple batteries arranged in a first direction, and each row of batteries being adjacent to another row of batteries in a second direction perpendicular to the first direction. as well as An electrical connection assembly, disposed at one end of the battery pack, includes: cage; An electrical connector assembly, fixed to the retainer, includes multiple rows of electrical connectors, each row comprising a plurality of electrical connectors spaced apart in a first direction, each row of electrical connectors being adjacent to another row of electrical connectors in a second direction, each electrical connector being connected to at least two batteries to electrically connect the at least two batteries; and An adhesive element, located between two adjacent rows of electrical connectors, bonds the retainer to the end face of the battery pack.

2. The battery module according to claim 1, characterized in that, The overall dimension of the two adjacent rows of electrical connectors in the second direction is D, in mm, and the dimension of the adhesive component located between the two adjacent rows of electrical connectors in the second direction is d, in mm. The ratio d / D satisfies: 0.02≤d / D≤0.

2.

3. The battery module according to claim 2, characterized in that, The battery is a cylindrical battery, and the ratio d / D satisfies: 0.03≤d / D≤0.

2.

4. The battery module according to claim 3, characterized in that, The adhesive is bonded to the end faces of two adjacent rows of batteries, which are staggered in the first direction, and the ratio d / D satisfies: 0.03≤d / D≤0.

15.

5. The battery module according to claim 3, characterized in that, The adhesive is bonded to the end faces of two adjacent rows of batteries, which are aligned in the first direction, and the ratio d / D satisfies: 0.03≤d / D≤0.

18.

6. The battery module according to claim 3, characterized in that, Each battery has a top surface and a terminal protruding from the top surface on the side facing the electrical connection assembly. Each electrical connector has an end face connection portion and a terminal connection portion protruding beyond the end face connection portion on the side facing away from the battery pack. The end face connection portion of each electrical connector is welded to the top surface of one of two adjacent batteries to form two welding points, and the terminal connection portion of the electrical connector is welded to the terminal of the other of the two adjacent batteries to form one welding point.

7. The battery module according to claim 3, characterized in that, The radius of each battery is r, in mm, and the dimension of the end face of each battery bonded to the adhesive in the second direction is a, in mm. The ratio a / r satisfies: 0.15≤a / r≤0.

35.

8. The battery module according to claim 2, characterized in that, The electrical connection assembly includes only two rows of electrical connectors, and the ratio d / D satisfies: 0.04≤d / D≤0.

2.

9. The battery module according to claim 2, characterized in that, The electrical connection assembly includes at least three rows of electrical connectors, and any two adjacent rows of electrical connectors are provided with the adhesive. The ratio d / D satisfies: 0.02≤d / D≤0.

16.

10. The battery module according to claim 2, characterized in that, The adhesive is a strip-shaped connector that extends continuously along the first direction.

11. The battery module according to claim 2, characterized in that, The adhesive component includes a plurality of adhesive segments, which are arranged at intervals along the first direction, and the ratio d / D satisfies: 0.04≤d / D≤0.

2.

12. The battery module according to claim 11, characterized in that, The sum of the dimensions of the plurality of adhesive segments in the first direction is w, in mm, and the dimension of the electrical connection assembly in the first direction is L, in mm. The ratio w / L satisfies: 0.3≤w / L≤0.

75.

13. The battery module according to any one of claims 1 to 12, characterized in that, The adhesive strength of the adhesive component is γ, in N / cm². 2 The value of γ ranges from 1.5 N / cm. 2 ≤γ≤6 N / cm 2 .

14. An electrical connection assembly, characterized in that, include: cage; An electrical connector assembly, fixed to the retainer, includes multiple rows of electrical connectors, each row of electrical connectors including multiple electrical connectors spaced apart in a first direction, each row of electrical connectors being adjacent to another row of electrical connectors in a second direction perpendicular to the first direction, each electrical connector being adapted to connect to at least two batteries of the battery pack to electrically connect the at least two batteries. as well as An adhesive element is disposed between two adjacent rows of electrical connectors and fixed to the retainer to be adapted to bond the retainer to the end face of the battery pack.

15. A battery pack, characterized in that, Includes a battery housing and a battery module housed therein according to any one of claims 1 to 13.

16. An electrical appliance, characterized in that, Includes the battery pack according to claim 15.

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