Connection structure and battery assembly

Abstract

The utility model provides a connection structure and a battery assembly. The connecting structure comprises at least one node assembly which has conductivity and comprises a main body piece and a limiting piece; the main body piece comprises a through hole, and the inner wall of the through hole is sequentially provided with a first limiting groove and a first protrusion in the first direction of the axis; the limiting piece is arranged in the through hole, at least part of the peripheral part is clamped with the first limiting groove, and the limiting piece protrudes towards the first direction and is used for being in contact with or abutting against the top end of the pole of the battery unit; and the first bulge is used for being clamped with a second limiting groove at the periphery of the pole. According to the embodiment of the invention, the connection stability between the connection structure and the battery unit can be enhanced, and effective electric connection between the connection structure and the pole can be maintained.

Description

Technical Field

[0001] This application relates to the technical field of batteries. Specifically, this application relates to a connection structure and a battery assembly. Background Art

[0002] With the development of science and technology, batteries are increasingly widely used in related industries such as portable mobile electronic products, power tools, and new energy.

[0003] Limited by the battery life of a single battery cell, the pole post of a single battery cell is often led out in an electronic device to facilitate electrical connection with other battery cells or electronic components to meet requirements.

[0004] In related technologies, a connection wire harness is used to electrically connect to and lead out the pole post of a battery cell. However, the installation is cumbersome and the anti-loosening function is insufficient. In a long-term state, it is easy to cause loosening between the wire harness and the battery cell, thereby affecting the effective electrical connection between the wire harness and the battery cell. Summary of the Utility Model

[0005] Aiming at the shortcomings of the existing methods, this application proposes a connection structure and a battery assembly to solve the technical problems of cumbersome installation and insufficient anti-loosening function in related technologies.

[0006] In a first aspect, an embodiment of this application provides a connection structure, including:

[0007] At least one node component, having electrical conductivity, the node component includes a main body part and a limiting part;

[0008] The main body part includes a through hole, and a first limiting groove and a first protrusion are sequentially arranged on the inner wall of the through hole along a first direction of the axis; the limiting part is arranged in the through hole, and at least part of the peripheral part is clamped with the first limiting groove, and the limiting part protrudes toward the first direction for contacting or abutting against the top end of the pole post of the battery cell;

[0009] The first protrusion is used for clamping with a second limiting groove on the outer periphery of the pole post.

[0010] In some possible embodiments, the limiting part is in a disc shape, and the peripheral part includes an annular structure; the middle part of the limiting part protrudes along the first direction;

[0011] The first limiting groove is in an annular shape.

[0012] In some possible embodiments, the main body part includes a first main body part and a second main body part arranged in sequence along the first direction; the through hole includes a first through hole section located in the first main body part and a second through hole section located in the second main body part, and the diameter of the first through hole section is smaller than that of the second through hole section; a first limiting groove is formed between the first main body part and the second main body part;

[0013] The peripheral portion of the limiting member abuts against the first main body portion, and the edge of the peripheral portion is snap-fitted into the first limiting groove.

[0014] In some possible embodiments, it further includes:

[0015] A first connecting member, having electrical conductivity;

[0016] Both ends of the first connecting member are connected to the outer peripheries of two adjacent main body members on the same layer.

[0017] In some possible embodiments, the first protrusion is formed on the inner wall of the second through-hole section;

[0018] The pole columns of the battery cells are correspondingly arranged in the second through-hole sections of the main body members one by one, and the first protrusion is snap-fitted with the second limiting groove of the battery cell.

[0019] In some possible embodiments, it further includes:

[0020] A second connecting member, having electrical conductivity, including a first part and a second part arranged in sequence along a first direction; in the main body members of adjacent two layers, the second main body portion of the upper-layer main body member is detachably connected to the first part of the second connecting member, and the first main body portion of the lower-layer main body member is detachably connected to the second part of the second connecting member;

[0021] The end face of the second connecting member protrudes towards the first direction and abuts against the limiting member in the lowermost-layer main body member.

[0022] In some possible embodiments, the first part of the second connecting member is located in the second through-hole section of the upper-layer main body member, the second part of the second connecting member is located in the first through-hole section of the lower-layer main body member, and the outer peripheral surface of the first part of the second connecting member has a third limiting groove; the third limiting groove is snap-fitted with the first protrusion on the inner wall of the second through-hole section of the upper-layer main body member.

[0023] In some possible embodiments, the top end of the first part has a limiting hole.

[0024] In a second aspect, an embodiment of the present application further provides a battery assembly, including: at least one battery cell and any one of the connection structures provided in the first aspect as described above;

[0025] The pole columns of the battery cells are arranged in the main body members of the node assemblies of the connection structure, and the top ends of the pole columns abut against the limiting members of the node assemblies.

[0026] In some possible embodiments, the connection structure includes at least three node assemblies, at least two first connecting members and at least one second connecting member; at least three node assemblies are used for detachably connecting with at least three battery cells respectively;

[0027] Among every three adjacent node components, a first connecting member is connected between the main members of two adjacent node components at the lowermost layer;

[0028] The main member of a node component at the lowermost layer is detachably connected to the main member of a node component at the upper layer through a second connecting member.

[0029] Another first connecting member is connected between the main member at the upper layer and the main member of another node component.

[0030] The beneficial technical effects brought by the technical solution provided by the embodiment of the present application include:

[0031] In the embodiment of the present application, the battery unit can be electrically connected to other battery units or electronic components through the node component. Among them, the node component includes a main member and a limiting member. The main member can accommodate the pole column of the battery unit and is clamped with the second limiting groove on the outer periphery of the pole column of the battery unit through the first limiting groove, which can enhance the connection stability between the main member and the battery unit. In the through hole of the main member, the protruding part of the limiting member can contact or abut against the top end of the pole column of the battery unit, further ensuring the effective electrical connection between the node component and the pole column of the battery unit.

[0032] The additional aspects and advantages of the present application will be partially given in the following description, and these will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0034] Figure 1 is a schematic structural diagram of a battery assembly provided by an embodiment of the present application;

[0035] Figure 2 is a schematic side view of a battery assembly provided by an embodiment of the present application;

[0036] Figure 3 is a schematic structural diagram of a battery unit provided by an embodiment of the present application;

[0037] Figure 4 is a schematic structural diagram of the main member of a connection structure provided by an embodiment of the present application;

[0038] Figure 5 is a schematic side view of the main member of a connection structure provided by an embodiment of the present application;

[0039] Figure 6 is Figure 5 a cross-sectional view at AA' in

[0040] Figure 7 is Figure 6 a partial enlarged view of the B part in

[0041] Figure 8 a schematic structural view of a connection structure provided by an embodiment of the present application

[0042] Figure 9 a schematic structural view of a second connecting member of a connection structure provided by an embodiment of the present application;

[0043] Figure 10 a side view schematic of a second connecting member of a connection structure provided by an embodiment of the present application.

[0044] Reference numerals:

[0045] 100 - connection structure;

[0046] 10 - node assembly; 11 - main body member; 110 - through hole; 111 - first main part; 1110 - first through hole section; 1111 - internal thread; 112 - second main part; 1120 - second through hole section; 1121 - first limiting groove; 1122 - first protrusion; 12 - limiting member; 121 - peripheral part; 122 - middle part;

[0047] 20 - first connecting member;

[0048] 30 - second connecting member; 31 - first part; 311 - third limiting groove; 312 - limiting hole; 32 - second part;

[0049] 200 - battery unit; 201 - pole; 202 - second limiting groove. Detailed implementation manners

[0050] The embodiments of the present application will be described below with reference to the drawings in the present application. It should be understood that the embodiments described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions of the embodiments of the present application.

[0051] Those skilled in the art of the present technology can understand that, unless specifically stated otherwise, the "the" and "this" used here may also include the plural form. It should be further understood that the term "including" used in the specification of the present application means the presence of the described features, integers, operations, elements and / or components, but does not exclude the implementation of other features, information, data, operations, elements, components and / or their combinations, etc. supported by the art of the present technology. The term "and / or" used here means at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or implemented as "B", or implemented as "A and B".

[0052] To make the objectives, technical solutions, and advantages of this application more clear, the following will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0053] The R & D concept of this application includes: With the development of science and technology, batteries are increasingly widely used in related industries such as portable mobile electronic products, power tools, and new energy.

[0054] Limited by the battery life of a single battery cell, single battery cells are often electrically connected to other battery cells or electronic components in an electronic device to meet the requirements.

[0055] In related technologies, a connection wire harness is electrically connected to and led out from the pole column of the battery cell. However, during the installation process, the wire harness is prone to displacement and needs to be positioned, making the installation rather cumbersome. Moreover, the anti-loosening function is insufficient, and over a long period, it is easy to cause loosening between the wire harness and the battery cell, thereby affecting the effective electrical connection between the wire harness and the battery cell.

[0056] The connection structure and battery assembly provided by this application aim to solve the above technical problems in related technologies.

[0057] The following will detail the technical solutions of this application and how the technical solutions of this application solve the above technical problems with specific embodiments. It should be noted that the following embodiments can refer to, draw on, or combine with each other. For the same terms, similar features, and similar implementation steps in different embodiments, they will not be described repeatedly.

[0058] An embodiment of this application provides a connection structure 100. Figure 1 A schematic diagram showing the connection of the connection structure 100 to the battery cell 200 is shown. Please refer to it together. Figures 1 - 7 The connection structure 100 includes: at least one node component 10.

[0059] The node component 10 has electrical conductivity. The node component 10 includes a main body part 11 and a limiting part 12.

[0060] The main body part 11 includes a through hole 110. Along the first direction of the axis of the inner wall of the through hole 110, a first limiting groove 1121 and a first protrusion 1122 are sequentially provided. The limiting part 12 is disposed in the through hole 110. At least part of the peripheral part 121 is clamped with the first limiting groove 1121. The limiting part 12 protrudes towards the first direction and is used to contact or abut against the top end of the pole column 201 of the battery cell 200.

[0061] The first protrusion 1122 is used to be clamped with the second limiting groove 202 on the outer periphery of the pole column 201.

[0062] In this embodiment, the battery unit 200 can be electrically connected to other battery units 200 or electronic components through the node assembly 10. Among them, the node assembly 10 includes a main body 11 and a limiting member 12. The main body 11 can accommodate the pole 201 of the battery unit 200, and is clamped with the second limiting groove 202 on the outer periphery of the pole 201 of the battery unit 200 through the first limiting groove 1121, which can enhance the connection stability between the main body 11 and the battery unit 200. Inside the through hole 110 of the main body 11, the protruding part of the limiting member 12 can contact or abut against the top end of the pole 201 of the battery unit 200, further ensuring the effective electrical connection between the node assembly 10 and the pole 201 of the battery unit 200.

[0063] It should be noted that the connection between each component of the connection structure 100 in the embodiment of the present application and the pole 201 of the battery unit 200 can refer to both physical connection and electrical connection.

[0064] It should be noted that the first direction is the direction facing the pole 201 of the battery unit 200 when the node assembly 10 is connected to the battery unit 200.

[0065] In some possible embodiments, please refer to Figure 6 and Figure 7 , the limiting member 12 is in a disc shape, and the peripheral part 121 includes an annular structure. The middle part 122 of the limiting member 12 protrudes along the first direction.

[0066] The first limiting groove 1121 is annular.

[0067] In this embodiment, the limiting member 12 is in a disc shape, the peripheral part is inserted into the through hole wall of the main body part, and the middle part 122 protrudes and abuts against the pole 201.

[0068] Optionally, along the first direction, the distance between the second limiting groove 202 on the pole 201 of the battery unit 200 and the top end face of the pole 201 is greater than the distance between the most protruding point of the limiting member 12 and the second limiting groove 202. Therefore, when the first protrusion 1122 is clamped with the second limiting groove 202, it is ensured that the most protruding point of the limiting member 12 contacts or abuts against the top end face of the pole 201. At the same time, under the interaction between the pole 201 of the battery unit 200 and the limiting member 12, the limiting member 12 is allowed to undergo partial deformation, so that a reaction force is formed between the limiting member 12 and the pole 201 of the battery unit 200. Through the above reaction force, the limiting member 12 and the pole 201 of the battery unit 200 are tightly connected.

[0069] In some possible embodiments, please refer to Figure 6 and Figure 7, the main body 11 includes a first main body portion 111 and a second main body portion 112 arranged in sequence along a first direction. The through hole 110 includes a first through hole section 1110 located in the first main body portion 111 and a second through hole section 1120 located in the second main body portion 112, and the diameter of the first through hole section 1110 is smaller than that of the second through hole section 1120. A first limiting groove 1121 is formed between the first main body portion 111 and the second main body portion 112.

[0070] The peripheral portion 121 of the limiting member 12 abuts against the first main body portion 111, and the edge of the peripheral portion 121 is clamped in the first limiting groove 1121.

[0071] In this embodiment, the main body 11 is formed by the first main body portion 111 and the second main body portion 112 with different hole diameters. The limiting member 12 is inserted into the first limiting groove 1121 formed at the junction of the first main body portion 111 and the second main body portion 112, so that the top end of the peripheral portion 121 of the limiting member 12 abuts against the bottom end of the first main body portion 111, and the bottom end of the peripheral portion 121 of the limiting member 12 abuts against the top end of the second main body portion 112. Therefore, since the aperture of the first through hole section 1110 of the first main body portion 111 is smaller and the second through hole section 1120 of the second main body portion 112 is larger, the top end of the peripheral portion 121 of the limiting member 12 between the two has a larger limiting range and the bottom end has a smaller limiting range, making the limiting member 12 more likely to deform.

[0072] In some possible embodiments, please refer to Figure 1 , Figure 2 and Figure 8 , the connection structure 100 further includes: a first connecting member 20.

[0073] The first connecting member 20 has electrical conductivity.

[0074] Both ends of the first connecting member 20 are connected to the outer periphery of two adjacent main bodies 11 on the same layer.

[0075] In this embodiment, both the physical connection and the electrical connection between the two node components 10 are realized by the first connecting member 20. Therefore, multiple battery units 200 are all connected to their respective node components 10, and the first connecting member 20 can connect the respective node components 10 of the multiple battery units 200 to achieve electrical connection between the multiple battery units 200.

[0076] Optionally, the outer periphery of the first connecting member 20 is wrapped with an insulating material, which can improve the electrical safety of the connection structure 100 during use.

[0077] In some possible embodiments, please refer to Figure 6 and Figure 7 , a first protrusion 1122 is formed on the inner wall of the second through hole section 1120.

[0078] The pole columns 201 of the battery cells 200 are correspondingly arranged in the second through-hole section 1120 of the main body member 11 one by one, and the first protrusion 1122 is clamped with the second limiting groove 202 of the battery cell 200.

[0079] In this embodiment, the first protrusion 1122 is formed on the inner wall of the second through-hole section 1120. When the pole column 201 is received in the second through-hole section 1120, it can be clamped with the second limiting groove 202 of the pole column 201 of the battery cell 200.

[0080] The research and development idea of this application also includes: multiple battery cells 200 can be connected in series through the first connecting member 20. However, there may be a situation where multiple battery cells 200 need to be connected in parallel. Therefore, the following embodiments are also provided in this application:

[0081] In some possible embodiments, please refer to Figures 1 - 2 、 Figures 8 - 10 together, the connection structure 200 further includes: a second connecting member 30.

[0082] The second connecting member 30 has conductivity and includes a first part 31 and a second part 32 arranged in sequence along the first direction. Among adjacent two layers of the main body members 11, the second main body part 112 of the upper-layer main body member 11 is detachably connected to the first part 31 of the second connecting member 30, and the first main body part 111 of the lower-layer main body member 11 is detachably connected to the second part 32 of the second connecting member 30.

[0083] The end face of the second connecting member 30 protrudes towards the first direction and abuts against the limiting member 12 in the lowermost layer of the main body member 11.

[0084] In this embodiment, a node assembly 10 includes a plurality of main body members 11 stacked along the first direction on the same pole column 201, all of which are electrically connected to the pole column 201. Then, the pole column 201 can be led out through the plurality of stacked main body members 11. Or rather, the plurality of stacked main body members 11 are equivalent to a plurality of connection terminals of the same pole column 201. By electrically connecting each main body member 11 to other battery cells 200, parallel connection between multiple battery cells 200 can be achieved.

[0085] In this embodiment, the second connecting member 30 also has conductivity. The second connecting member 30 is detachably connected to the second main body part 112 of the main body member 11 of the upper-layer node assembly 10 among the plurality of stacked main body members 11 through the first part 31, and the second connecting member 30 is detachably connected to the first main body part 111 of the main body member 11 of the lower layer among the plurality of stacked main body members 11 through the second part 32. That is to say, the second connecting member 30 can cooperate with the structure of the main body member 11, be stably connected thereto, and achieve electrical connection.

[0086] Moreover, the end face of the bottom end of the second connecting member 30 is similar to the end face of the bottom end of the limiting member 12, both protruding toward the first direction. The end face of the second connecting member 30 abuts against the limiting member 12 in the lowermost layer of the main body members 11, which can effectively prevent the limiting member 12 from detaching from the pole 201 of the battery unit 200, so that a stable connection is maintained between the limiting member 12 and the pole 201.

[0087] It can be understood that the node assembly 10 includes at least two stacked main body members 11. The limiting member 12 is provided in the lowermost main body member 11, and the limiting member 12 may or may not be provided in the upper main body members, which can be specifically determined according to the dimension of the first part 31 of the second connecting member 30 in the first direction. For example, in the upper main body member 11, when the limiting member 12 is provided and the first part 31 of the second connecting member 30 can be accommodated between the limiting member 12 and the first protrusion 1122, the limiting member 12 can be provided in the upper main body member 11. If the first part 31 of the second connecting member 30 cannot be accommodated between the limiting member 12 and the first protrusion 1122 when the limiting member 12 is provided, there is no need to provide the limiting member 12 in the upper main body member 11. Of course, the stacked upper and lower main body members 11 are electrically connected.

[0088] In some possible embodiments, please also refer to Figures 1 - 2 、 Figures 8 - 10 , the first part 31 of the second connecting member 30 is located in the second through-hole section 1120 of the upper-layer main body member 11, the second part 32 of the second connecting member 30 is located in the first through-hole section 1110 of the lower-layer main body member 11, and the outer peripheral surface of the first part 31 of the second connecting member 30 has a third limiting groove 311. The third limiting groove 311 is clamped with the first protrusion 1122 on the inner wall of the second through-hole section 1120 of the upper-layer main body member 11.

[0089] In this embodiment, the outer diameter of the first part 31 of the second connecting member 30 is larger than the outer diameter of the second part 32, which cleverly cooperates with the apertures of the second through-hole section 1120 and the first through-hole section 1110 of the main body member 11, so that the two stacked main body members 11 are stably connected by the second connecting member 30 and electrical connection is achieved. Moreover, since the second connecting member 30 is entirely disposed in the first through-hole section 1110 and the second through-hole section 1120 of the main body part and does not need to be exposed outside the main body member 11, the overall layout of the connection structure 100 is relatively tidy.

[0090] Moreover, the outer peripheral surface of the first part 31 of the second connecting member 30 has a third limiting groove 311, which is located in the second through-hole section 1120 of the upper-layer main body member 11 and can be clamped with the first protrusion 1122 in the second through-hole section 1120, so that a firm connection is maintained between the upper-layer main body member 11 and the second connecting member 30.

[0091] Optionally, the outer periphery of the second part 32 of the second connecting member 30 has an external thread, and the inner wall of the first through-hole section 1110 in the through-hole of the main body member 11 has an internal thread 1111. The outer periphery of the second part 32 of the second connecting member 30 is threadedly connected to the inner wall of the first through-hole section 1110 of the main body member 11 located in the lower layer.

[0092] Moreover, since the first through-hole section 1110 has a certain dimension in the first direction, the distance between the bottom end of the second part 32 and the limiting member 12 can be adjusted by adjusting the position of the second part 32 in the first through-hole section 1110, and further, the tightness between the second part 32, the limiting member 12 and the pole 201 can be adjusted.

[0093] In some possible embodiments, referring to Figure 8 and Figure 9 , the top end of the first part 31 has a limiting hole 312.

[0094] In this embodiment, the limiting hole 312 has a certain edge along the circumferential direction, and the second connecting member 30 and the main body member 11 can be tightened by a tool. For example, the limiting hole 312 can be hexagonal to fit an internal hexagon wrench, plum-shaped to fit a plum blossom screwdriver, or linear to fit a flat-head screwdriver. However, it is not limited thereto, and it can be determined according to actual needs.

[0095] Based on the same inventive concept, referring to Figures 1 - 3 , an embodiment of the present application further provides a battery assembly, including: at least one battery unit 200 and any one of the connection structures 100 provided in the first aspect above.

[0096] The pole 201 of the battery unit 200 is arranged in the main body member 11 of the node assembly 10 of the connection structure 100, and the top end of the pole 201 abuts against the limiting member 12 of the node assembly 10.

[0097] The embodiment of the present application adopts any one of the battery assemblies provided in the foregoing embodiments. The implementation principle and structure are similar, and will not be described in detail herein. The battery unit 200 can be electrically connected to other battery units 200 or electronic components through the node assembly 10. Among them, the node assembly 10 includes a main body member 11 and a limiting member 12. The main body member 11 can accommodate the pole 201 of the battery unit 200 therein, and is clamped with the second limiting groove 202 on the outer periphery of the pole 201 of the battery unit 200 through the first limiting groove 1121, which can enhance the connection stability between the main body member 11 and the battery unit 200. In the through-hole of the main body member 11, the protruding part of the limiting member 12 can contact or abut against the top end of the pole 201 of the battery unit 200, further ensuring the effective electrical connection between the node assembly 10 and the pole 201 of the battery unit 200.

[0098] In some possible embodiments, such as Figure 1 and Figure 2As shown, the connection structure 100 includes at least three node components 10, at least two first connectors 20, and at least one second connector 30. At least three node components 10 are used to be detachably connected to at least three battery cells 200 respectively.

[0099] Among every three adjacent node components 10, one first connector 20 is connected between the main bodies 11 of the two adjacent node components 10 at the lowermost layer.

[0100] The main body 11 of one node component 10 at the lowermost layer is detachably connected to the main body 11 of the node component 10 at the upper layer through the second connector 30.

[0101] Another first connector 20 is connected between the main body 11 of the upper layer and the main body 11 of another node component 10.

[0102] In this embodiment, each node component 10 is connected to each battery cell 200 in one-to-one correspondence. Among them, at least one node component 10 includes at least two stacked main bodies 11. These two main bodies 11 are respectively connected to the main bodies 11 of the node components 10 connected to different battery cells 200 through the first connectors 20, so as to realize the electrical connection between at least three battery cells 200. Optionally, the first main part 111 of one main body 11 at the lowermost layer is detachably connected to the second part 32 of the second connector 30, and the first part 31 of the second connector 30 is detachably connected to the second main part 112 of the main body 11 at the upper layer.

[0103] Applying the embodiments of the present application can at least achieve the following beneficial effects:

[0104] 1. The battery cell 200 can be electrically connected to other battery cells 200 or electronic components through the node component 10. Among them, the node component 10 includes a main body 11 and a limiting member 12. The main body 11 can accommodate the pole 201 of the battery cell 200, and is clamped with the second limiting groove 202 on the outer periphery of the pole 201 of the battery cell 200 through the first limiting groove 1121, which can enhance the connection stability between the main body 11 and the battery cell 200. Inside the through hole of the main body 11, the protruding part of the limiting member 12 can contact or abut against the top end of the pole 201 of the battery cell 200, further ensuring the effective electrical connection between the node component 10 and the pole 201 of the battery cell 200.

[0105] 2. Along the first direction, the distance between the second limiting groove 202 on the pole 201 of the battery cell 200 and the top end face of the pole 201 is greater than the distance between the most convex point of the limiting member 12 and the second limiting groove 202. Therefore, when the first protrusion 1122 is engaged with the second limiting groove 202, it is ensured that the most convex point of the limiting member 12 is in contact with or abuts against the top end face of the pole 201. At the same time, under the interaction between the pole 201 of the battery cell 200 and the limiting member 12, the limiting member 12 is allowed to undergo partial deformation, so that a reaction force is formed between the limiting member 12 and the pole 201 of the battery cell 200. Through the above reaction force, the limiting member 12 and the pole 201 of the battery cell 200 are tightly connected.

[0106] 3. The main body part is formed by a first main body part 111 and a second main body part 112 with different hole diameters. The limiting member 12 is inserted into the first limiting groove 1121 formed at the junction of the first main body part 111 and the second main body part 112, so that the top end of the peripheral part 121 of the limiting member 12 abuts against the bottom end of the first main body part 111, and the bottom end of the peripheral part 121 of the limiting member 12 abuts against the top end of the second main body part 112. Therefore, since the aperture of the first through-hole section 1110 of the first main body part 111 is smaller and the aperture of the second through-hole section 1120 of the second main body part 112 is larger, the top end of the peripheral part 121 of the limiting member 12 between the two has a larger limiting range, and the bottom end has a smaller limiting range, making it easier for the limiting member 12 to deform.

[0107] 4. Both the physical connection and the electrical connection between the two node components 10 are realized by the first connecting member 20. Therefore, multiple battery cells 200 are all connected to their respective node components 10, and the first connecting member 20 can connect the respective node components 10 of the multiple battery cells 200 to achieve the electrical connection between the multiple battery cells 200.

[0108] 5. A node component 10 includes a plurality of main body members 11 stacked along the first direction on the same pole 201, all of which are electrically connected to the pole 201. Then, the pole 201 can be led out through the plurality of stacked main body members 11. Or rather, the plurality of stacked main body members 11 are equivalent to multiple connection terminals of the same pole 201. By electrically connecting each main body member 11 to other battery cells 200, the parallel connection between the multiple battery cells 200 can be achieved.

[0109] 6. The second connecting member 30 is also electrically conductive. The second connecting member 30 is detachably connected to the second main portion 112 of the main body member 11 of the node assembly 10 in the upper layer of the stacked plurality of main body members 11 through the first portion 31, and the second connecting member 30 is detachably connected to the first main portion 111 of the main body member 11 in the lower layer of the stacked plurality of main body members 11 through the second portion 32. That is to say, the second connecting member 30 can cooperate with the structure of the main body member 11, stably connect with it, and achieve electrical connection. Moreover, the end face of the bottom end of the second connecting member 30 is similar to the end face of the bottom end of the limiting member 12, both protruding towards the first direction. The end face of the second connecting member 30 abuts against the limiting member 12 in the lowermost layer of the main body member 11, which can effectively prevent the limiting member 12 from detaching from the pole 201 of the battery unit 200, so that a stable connection is maintained between the limiting member 12 and the pole 201.

[0110] In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are the exemplary directions or positional relationships based on the drawings, which are for the convenience of describing or simplifying the embodiments of the present application, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0111] The terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0112] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0113] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0114] The above are only some embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical concept of the present application, other similar implementation means based on the technical idea of the present application also fall within the scope of protection of the embodiments of the present application.

Claims

1. A connection structure, characterized in that: include: At least one node component is conductive, and the node component includes a main body and a limiter; The main body comprises a through hole, and the inner wall of the through hole is provided with a first limiting groove and a first protrusion in sequence along the first direction of the axis; the limiting member is arranged in the through hole, and at least a part of the peripheral portion is engaged with the first limiting groove, and the limiting member protrudes toward the first direction, and is used to contact or abut against the top end of the pole of the battery unit; The first protrusion is used to engage with the second limiting groove on the outer periphery of the pole.

2. The connection structure according to claim 1, characterized in that: The limiting member is disc-shaped, and the peripheral portion includes an annular structure; the middle portion of the limiting member protrudes along the first direction; The first limiting groove is ring-shaped.

3. The connection structure according to claim 2, characterized in that: The main body comprises a first main body portion and a second main body portion arranged in sequence along a first direction; the through hole comprises a first through hole section located in the first main body portion and a second through hole section located in the second main body portion, the diameter of the first through hole section is smaller than the diameter of the second through hole section; the first limiting groove is formed between the first main body portion and the second main body portion; The peripheral portion of the limiting member abuts against the first main body portion, and the edge of the peripheral portion is clamped in the first limiting groove.

4. The connection structure according to claim 1, characterized in that: Also includes: A first connecting member having electrical conductivity; Both ends of the first connecting member are connected to the outer peripheries of two adjacent main body members on the same layer.

5. The connection structure according to claim 4, characterized in that: The first protrusion is formed on the inner wall of the second through hole section; The poles of the battery cells are arranged in a one-to-one correspondence in the second through-hole section of the main body, and the first protrusion is engaged with the second limiting groove of the battery cell.

6. The connection structure according to claim 1, characterized in that: Also includes: The second connecting member is conductive and includes a first portion and a second portion arranged in sequence along the first direction; in the main members of two adjacent layers, the second main portion of the main member located in the upper layer is detachably connected to the first portion of the second connecting member, and the first main portion of the main member located in the lower layer is detachably connected to the second portion of the second connecting member; The end surface of the second connecting member protrudes toward the first direction and abuts against the limiting member in the bottommost layer of the main body member.

7. The connection structure according to claim 6, characterized in that: The first part of the second connecting member is located in the second through hole section of the main body of the upper layer, and the second part of the second connecting member is located in the first through hole section of the main body of the lower layer. The outer peripheral surface of the first part of the second connecting member has a third limiting groove; the third limiting groove is clamped with the first protrusion on the inner wall of the second through hole section of the main body of the upper layer.

8. The connection structure according to claim 6, characterized in that: The top end of the first part is provided with a limiting hole.

9. A battery assembly, characterized in that: include: At least one battery cell, and a connection structure as claimed in any one of claims 1 to 8; The pole of the battery unit is arranged in the main body of the node assembly of the connection structure, and the top end of the pole abuts against the limiting member of the node assembly.

10. The battery assembly according to claim 9, characterized in that: The connection structure comprises at least three node assemblies, at least two first connecting members and at least one second connecting member; the at least three node assemblies are used to be detachably connected to the at least three battery cells respectively; In every three adjacent node assemblies, one of the first connecting members is connected between the main members of the two adjacent node assemblies at the bottom layer; A main body of the node assembly located at the bottom layer is detachably connected to a main body of the node assembly located at an upper layer via the second connecting member; Another of the first connecting members is connected between the main body member of the upper layer and the main body member of another of the node components.

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