Battery cell connection structure and battery module

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cell connecting structure and a battery module, the battery cell connecting structure comprises an electric connecting body and an insulating bracket, the insulating bracket is fixedly arranged at the end part of a battery cell, the insulating bracket is provided with a mounting hole penetrating through the insulating bracket along a first direction, and the electric connecting body is fixed in the mounting hole. The electric connection body comprises a quick insertion part, a connection part and at least two clamping parts, the at least two clamping parts are arranged at intervals in the second direction, and the first ends of the clamping parts are connected with the connection part, so that a clamping gap capable of clamping a battery cell tab is formed between every two adjacent clamping parts. The quick insertion part is fixedly arranged on the connecting part. According to the battery cell connection structure and the battery module provided by the invention, the assembly of the battery cell and the battery module is not limited by welding equipment any more, the assembly flexibility of the battery cell and the battery module is improved, the reusability of the electric connection structure is realized, and the electric connection convenience and rapidity of the battery cell connection structure are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell connection structure and a battery module. Background Art

[0002] In the field of power batteries, battery modules are usually composed of a large number of battery cells connected in series / parallel via conductive circuits. In today's battery modules, the battery cells and conductive circuits are usually electrically connected by welding (for example, ultrasonic welding, tin welding, laser welding, etc.). This requires the assembly line of the battery module to be equipped with a large number of welding equipment. On the one hand, the equipment cost of the assembly line of the battery module is high, and the flexibility of the assembly line is low; on the other hand, once the battery module needs to be disassembled, modified, or individual cells in the battery module fail, the operator needs to destroy the conductive circuit (for example, cutting, grinding) during the disassembly and modification process or when replacing and repairing the faulty cells. Not only is the original conductive circuit difficult to reuse, resulting in waste, but the disassembly, modification and maintenance of the battery module are inconvenient. Utility Model Content

[0003] The purpose of the present application is to provide a battery cell connection structure and a battery module, so as to solve to a certain extent the problems existing in the prior art that the equipment cost of the battery module assembly production line is high and the flexibility of the assembly production line is low; once the battery module needs to be disassembled, modified or individual batteries in the battery module fail, during the disassembly, modification process or when replacing and repairing the failed battery cell, the operator needs to destroy the conductive circuit (for example, cutting, grinding), which not only makes the original conductive circuit difficult to reuse, resulting in waste, but also causes technical problems such as inconvenient disassembly, modification and maintenance of the battery module.

[0004] According to a first aspect of the present application, there is provided a cell connection structure for external electrical connection of a cell, the cell connection structure comprising an electrical connection body and an insulating bracket, the insulating bracket being fixedly arranged at an end of the cell, the insulating bracket being provided with an installation hole penetrating the insulating bracket along a first direction, the electrical connection body being fixed in the installation hole;

[0005] The electrical connection body comprises a quick-insertion portion, a connection portion and at least two clamping portions, wherein the clamping portion comprises a first end and a second end arranged opposite to each other in the first direction, at least two of the clamping portions are arranged at intervals along the second direction, and the first ends of the clamping portions are both connected to the connection portion, so that a clamping gap capable of clamping the tab of the battery cell is formed between two adjacent clamping portions, and the second direction intersects with the first direction;

[0006] The quick-insertion part is fixedly arranged on the connection part, and is used for external electrical connection of the electrical connection body.

[0007] Preferably, there are two clamping parts, and the two clamping parts are respectively fixed to two ends of the connecting part in the second direction.

[0008] Preferably, the clamping portion is provided with a clamping protrusion, and the clamping protrusion protrudes from the outer side of the clamping portion toward the middle of the clamping gap along the second direction.

[0009] Preferably, the number of the clamping protrusions is one or more;

[0010] When there are multiple clamping protrusions, the multiple clamping protrusions are arranged at intervals along the first direction.

[0011] Preferably, the clamping portion further comprises a guide portion, and the guide portion is located at the second end of the clamping portion;

[0012] In the first direction, one end of the guide portion close to the connecting portion points to the other end, and the guide portion gradually inclines toward the outside of the clamping gap.

[0013] Preferably, the quick-insertion portion is arranged on a side of the connecting portion facing the clamping portion, and is arranged in the clamping gap;

[0014] The connecting portion is provided with a connecting hole penetrating the connecting portion, and the quick-insertion portion is provided with a plug hole extending along the first direction, and the plug hole is butted against the connecting hole.

[0015] Preferably, the insulating bracket is provided with one or more placement holes;

[0016] The insulating bracket further includes a positioning beam extending along a third direction, each of the placement holes is provided with the positioning beam, and two ends of the positioning beam in the third direction are respectively fixedly connected to the inner wall of the placement hole;

[0017] The two clamping portions can be respectively inserted into the placement hole from both sides of the positioning beam in the second direction, and the third direction intersects with the second direction.

[0018] Preferably, the insulating support further comprises a blocking piece portion arranged along an edge of the placement hole, wherein the blocking piece portion is arranged on a side of the insulating support facing away from the battery cell and protrudes relative to a surface of the insulating support.

[0019] Preferably, the insulating support further comprises a limiting component, and the limiting component is arranged on the side wall of the insulating support to fix the insulating support;

[0020] The limiting assembly includes a limiting protrusion and / or a limiting groove.

[0021] According to the second aspect of the present application, a battery module is provided, comprising a cell connection structure as described in any of the above technical solutions, and thus having all the beneficial technical effects of the cell connection structure, which will not be described in detail herein.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] The battery cell connection structure provided in the present application fixes the electrical connection body through an insulating bracket that can be fixedly arranged at the end of the battery cell, and enables the electrical connection body to be arranged in the placement hole, thereby ensuring the insulation of the electrical connection body. The electrical connection body is arranged to have at least two clamping parts spaced apart along the second direction, and the first end of each clamping part is connected to the connecting part, so that a clamping gap for clamping the battery cell pole ear can be formed between two adjacent clamping parts, and the quick-insertion part is arranged on the connecting part. In this way, the quick-insertion part, the connecting part and the clamping part constitute a passage for electrical connection with the pole ear of the battery cell. When the battery cell needs to be electrically connected to the outside, the quick-insertion part and the external electrical connection structure can be quickly plugged in, so that the assembly of the battery cell and the battery module is no longer limited by welding equipment, thereby improving the assembly flexibility of the battery cell and the battery module; once the battery module needs to be disassembled, modified or individual batteries in the battery module fail, it can be achieved by simply disconnecting the plug-in relationship between the quick-insertion part and the external electrical connection structure, thereby achieving the reusability of the electrical connection structure and improving the convenience and speed of electrical connection of the battery cell connection structure.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic cross-sectional view of a cell connection structure provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the isometric structure of the electrical connection body provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the isometric structure of the insulating bracket provided in an embodiment of the present application;

[0029] Figure 4A schematic diagram of an exploded structure of a battery cell connection structure provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the isometric structure of a battery module provided in an embodiment of the present application;

[0031] Figure 6 This is another isometric structural schematic diagram of the battery module provided in an embodiment of the present application.

[0032] Reference numerals:

[0033] 1-electrical connection body; 11-clamping part; 111-clamping protrusion; 112-guide part; 12-connecting part; 121-connecting hole; 13-accommodating space; 2-insulating bracket; 20-placement hole; 21-positioning beam; 211-positioning hole; 22-blocking piece; 231-limiting protrusion; 232-limiting groove; 3-quick plug part; 4-battery cell; 41-ear; 5-buffer layer.

[0034] L-length direction; W-width direction; T-thickness direction. DETAILED DESCRIPTION

[0035] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0036] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0037] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0038] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] Refer to the following Figures 1 to 6 The battery cell connection structure and the battery module according to some embodiments of the present application are described.

[0041] See also Figures 1 to 6 As shown, an embodiment of the first aspect of the present application provides a cell connection structure for external electrical connection of a cell 4, the cell connection structure includes an electrical connection body 1 and an insulating bracket 2, the insulating bracket 2 can be fixedly arranged at the end of the cell 4, the insulating bracket 2 is provided with a placement hole 20 that penetrates the insulating bracket 2 along a first direction, and the electrical connection body 1 is fixed in the placement hole 20. The electrical connection body 1 includes a quick-insertion portion 3, a connecting portion 12 and at least two clamping portions 11, the clamping portion 11 includes a first end and a second end that are arranged opposite to each other in the first direction, at least two clamping portions 11 are arranged at intervals along the second direction, and the first ends of the clamping portions 11 are connected to the connecting portion 12, so that a clamping gap that can clamp the tab 41 of the cell 4 is formed between two adjacent clamping portions 11, and the second direction intersects with the first direction. The quick-insertion portion 3 is fixedly arranged on the connecting portion 12, and is used for external electrical connection of the electrical connection body 1.

[0042] According to the battery cell connection structure provided by the above technical features, the insulating bracket 2 can be fixedly arranged at the end of the battery cell 4 to fix the electrical connection body 1, and the electrical connection body 1 is arranged in the placement hole 20, thereby ensuring the insulation of the electrical connection body 1. The electrical connection body 1 is arranged to have at least two clamping parts 11 spaced apart along the second direction, and the first end of each clamping part 11 is connected to the connecting part 12, so that a clamping gap for clamping the pole ear 41 of the battery cell 4 can be formed between two adjacent clamping parts 11, and the quick-insertion part 3 is arranged on the connecting part 12, so that the quick-insertion part 3, the connecting part 12 and the clamping part 11 constitute a passage electrically connected to the pole ear 41 of the battery cell 4, and when the battery cell 4 needs to be electrically connected to the outside, it can be quickly plugged in with the external electrical connection structure through the quick-insertion part 3, so that the assembly of the battery cell 4 and the battery module is no longer limited by welding equipment, thereby improving the assembly flexibility of the battery cell 4 and the battery module; once the battery module needs to be disassembled, modified or individual batteries 4 in the battery module fail, it can be achieved by simply disconnecting the plug-in relationship between the quick-insertion part 3 and the external electrical connection structure, thereby achieving the reusability of the electrical connection structure and improving the convenience and speed of the electrical connection of the battery cell connection structure.

[0043] like Figures 1 to 6 An example is shown in which the tab 41 of the battery cell 4 is disposed at one end in the length direction L of the battery cell 4, and correspondingly, the first direction may be parallel to the length direction L. The second direction may be parallel to the thickness direction T of the battery cell 4. Correspondingly, the third direction described below may be parallel to the width direction W of the battery cell 4. However, it is not limited thereto, and the first direction may be adaptively adjusted according to the position of the tab 41 relative to the battery cell 4.

[0044] Preferably, if Figure 1 and Figure 2 As shown in the figure, an example is shown in which the electrical connection body 1 is provided with two clamping parts 11, but it is not limited to this. As long as the clamping of the pole ear 41 can be achieved, the number of the clamping parts 11 provided in the above-mentioned electrical connection body 1 can also be multiple (for example, 3, 4, 5... or more), and the multiple clamping parts 11 can be arranged in sequence and spaced apart along the second direction.

[0045] like Figures 1 to 4 As shown, the structure of the electrical connection body 1 will be described in detail below by taking an example in which the electrical connection body 1 is provided with two clamping portions 11 .

[0046] Preferably, if Figure 1 and Figure 2 As shown, the two clamping portions 11 can be fixed to the two ends of the connecting portion 12 in the second direction respectively, so as to effectively expand the space of the contact gap enclosed between the two clamping portions 11 .

[0047] Preferably, if Figure 1 and Figure 2 As shown, the quick-insertion part 3 can be arranged on the side of the connecting part 12 facing the clamping part 11, and arranged in the clamping gap, so that the quick-insertion part 3 can be hidden in the clamping gap, thereby reducing the space occupied by the electrical connection body 1 and ensuring the neatness and flatness of the upper surface of the electrical connection body 1.

[0048] Preferably, if Figure 1 and Figure 2 As shown, the above-mentioned connecting part 12 can be provided with a connecting hole 121 that passes through the connecting part 12, and the quick-insertion part 3 is provided with a socket extending along the first direction, and the socket is connected to the connecting hole 121. In this way, the external electrical connection structure is plugged into the socket through the connecting hole 121, thereby realizing the electrical connection between the external electrical connection structure and the electrical connection body 1.

[0049] Optionally, the above-mentioned jack may be a threaded hole, a snap-on hole, a riveted hole or a female socket of an electrical connector.

[0050] However, the quick-connect part 3 is not limited to the structure of the above-mentioned socket. As long as the electrical connection and plugging between the quick-connect part 3 and the external electrical connection structure can be achieved, the quick-connect part 3 can also be a pin structure protruding to the outside of the electrical connection body 1 relative to the connecting part 12. For example, the quick-connect part 3 can also be an electrical connector male socket, a stud, a rivet column, a bayonet pin, etc.

[0051] Preferably, if Figure 1 and Figure 2 As shown, the clamping portion 11 may be provided with a clamping protrusion 111, and the clamping protrusion 111 may protrude from the outer side of the clamping portion 11 to the middle of the clamping gap along the thickness direction T. In this way, the width of the clamping gap at the position of the clamping protrusion 111 can be effectively shortened to further enhance the clamping force of the two clamping portions 11 on the pole lug 41, so as to ensure the electrical connection stability between the electrical connection body 1 and the pole lug 41.

[0052] Preferably, if Figure 2 As shown, in the length direction L, the above-mentioned clamping protrusion 111 can be arranged close to the second end, so that the side of the two clamping parts 11 close to the first end and the connecting part 12 can be surrounded to form a accommodating space 13 of a certain volume to accommodate the above-mentioned quick-insertion part 3 and the following positioning beam 21.

[0053] Preferably, if Figure 1 and Figure 2As shown in the figure, an example in which the number of the above-mentioned clamping protrusions 111 is two, and the two clamping protrusions 111 are spaced apart in the first direction. In this way, on the one hand, the clamping stability of the two clamping parts 11 on the pole lug 41 is further improved; on the other hand, the contact area between the electrical connection body 1 and the pole lug 41 is effectively increased to increase the flow area between the pole lug 41 and the electrical connection body 1, thereby ensuring the current transmission capacity of the battery cell connection structure.

[0054] It should be noted that the number of clamping protrusions 111 provided on the above-mentioned clamping portion 11 is not limited to the above-mentioned two examples. As long as the clamping stability of the two clamping portions 11 on the pole lug 41 and the flow area of ​​the electrical connection body 1 and the pole lug 41 can be guaranteed, the number of clamping protrusions 111 provided on the above-mentioned clamping portion 11 can also be 1, 3, 4... or more.

[0055] Alternatively, if Figure 2 As shown, the clamping protrusion 111 may be sharp-angled when viewed along the width direction W, so as to facilitate the processing of the clamping protrusion 111. However, it is not limited thereto, and the clamping protrusion 111 may also be boss-shaped or in other regular or irregular shapes as long as it is convenient for the clamping portion 11 to clamp the tab 41.

[0056] Optionally, not shown in the figure, the above-mentioned electrical connection body 1 can also include a tightening portion, which can be clamped on the outside of the two clamping portions 11 to further improve the clamping force of the two clamping portions 11 on the pole lug 41, thereby ensuring the electrical connection stability between the pole lug 41 and the electrical connection body 1.

[0057] Optionally, the clamping portion may be a clamp sleeve or a U-shaped clamp to facilitate assembly of the electrical connection body 1 .

[0058] Preferably, although not shown in the figures, the tightening portion may be clamped on the outer side of the clamping protrusion 111 so as to limit the position of the tightening portion through a groove formed on the outer side of the clamping protrusion 111 .

[0059] Preferably, if Figure 1 and Figure 2 As shown, the clamping portion 11 further includes a guide portion 112, which can be located at the second end of the clamping portion 11. In the first direction, one end of the guide portion 112 close to the connecting portion 12 points to the other end, and the guide portion 112 gradually tilts toward the outside of the clamping gap, so that a trumpet-shaped opening is formed in the clamping gap at the position where the second end of the clamping portion 11 is located, so as to facilitate the assembly of the electrical connection body 1 and the insulating bracket 2, that is, to provide guidance for the positioning beam 21 to be installed into the clamping gap.

[0060] Preferably, the connecting portion 12 , the clamping portion 11 and the quick-insertion portion 3 may be integrally connected.

[0061] Optionally, the electrical connection body 1 may be made of conductive metals such as copper, iron, gold, silver, etc., or may be a composite conductive material of two or more such as nickel-plated copper and nickel-plated steel.

[0062] Preferably, if Figure 1 and Figure 2 As shown, the connecting portion 12 and the clamping portion 11 can both extend a predetermined width along the width direction W to ensure that the clamping portion 11 can completely cover the pole lug 41 in the width direction W, which can not only further increase the connection area between the pole lug 41 and the clamping portion 11 to ensure the flow area of ​​the pole lug 41; but also enable the electrical connection body 1 to completely protect the pole lug 41 to prevent the pole lug 41 from being exposed to the outside of the electrical connection body 1 and being damaged or causing leakage due to accidental contact with other components.

[0063] Preferably, if Figure 1 and Figure 2 As shown, the figure shows an example in which two quick-insertion parts 3 and two connection holes 121 are provided on each connection part 12 to increase the plug-in position between the electrical connection body 1 and the external electrical connection structure, so as to facilitate the series-parallel connection of the battery cells 4.

[0064] Preferably, if Figure 2 As shown, the two quick-insertion parts 3 can be arranged at intervals along the width direction W of the connecting part 12. The two connecting holes 121 can be arranged corresponding to the two quick-insertion parts 3.

[0065] In the embodiment, preferably, the insulating bracket 2 may be provided with a plurality of placement holes 20 to adapt to the structure of leading out a plurality of tabs 41 from one end of the battery cell 4. Figures 3 to 6 As shown, an example is shown in which the insulating bracket 2 is provided with two placement holes 20 , and the two placement holes 20 can be arranged at intervals along the width direction W of the battery cell 4 .

[0066] However, it is not limited to this, and the number of the placement holes 20 on the insulating bracket 2 can be adaptively adjusted according to the number of the pole ears 41 led out from one end of the battery cell 4. For example, if the number of the pole ears 41 led out from one end of the battery cell 4 is one, the number of the placement holes 20 on the insulating bracket 2 is also one; for another example, if the number of the pole ears 41 led out from one end of the battery cell 4 is three, the number of the placement holes 20 on the insulating bracket 2 is also three.

[0067] Preferably, if Figure 3As shown, the insulating bracket 2 may further include a positioning beam 21 extending along the third direction, and each placement hole 20 is provided with the positioning beam 21. The two ends of the positioning beam 21 in the width direction W are respectively fixedly connected to the inner wall of the placement hole 20, so that two limiting gaps can be formed on both sides of the positioning beam 21 in the thickness direction T. The two clamping parts 11 can be inserted into the placement hole 20 from both sides of the positioning beam 21 in the width direction W (i.e., the above-mentioned limiting gaps), so that the positioning beam 21 limits the connection part 12, thereby realizing the fixation and limiting of the electrical connection body 1 in the placement hole 20.

[0068] It should be noted that the above-mentioned electrical connection body 1 can be an integrally formed elastic structure, so that during the assembly process of the electrical connection body 1 and the insulating bracket 2, the second ends of the two clamping parts 11 can be opened to a certain width, so that after the positioning beam 21 enters the above-mentioned accommodating space 13, the second ends of the two clamping parts 11 can return to their original state to ensure the clamping functionality of the two clamping parts 11.

[0069] Preferably, if Figure 1 and Figure 2 As shown, the positioning beam 21 may further include a positioning hole 211, the shape of which may be adapted to the contour of the quick-insertion portion 3. On the one hand, when the positioning beam 21 is in the accommodating space 13, the quick-insertion portion 3 is just inserted into the positioning hole 211, so that the positioning hole 211 can effectively avoid the quick-insertion portion 3, thereby saving space for the battery cell connection structure. On the other hand, the positioning accuracy of the electrical connection body 1 in the placement hole 20 can be further improved, thereby ensuring the assembly accuracy of the battery cell 4.

[0070] Preferably, if Figure 1 , Figures 3 to 6 As shown, the insulating bracket 2 may further include a baffle portion 22 arranged along the edge of the placement hole 20, and the baffle portion 22 is arranged on the side of the insulating bracket 2 facing away from the battery cell 4, and protrudes relative to the surface of the insulating bracket 2, so that when an external electrical connection structure (for example, a wire, a bus, etc.) is connected to the battery cell 4, the baffle portion 22 can effectively prevent the redundant part of the external electrical connection structure (for example, redundant wires) from contacting the electrical connection body 1, thereby effectively reducing the probability of leakage, short circuit, etc. of the electrical connection body 1 due to accidental touch.

[0071] Preferably, if Figures 3 to 6 As shown, the blocking piece 22 may be a sheet-like structure perpendicular to the width direction W. The blocking piece 22 may be disposed on both sides of the placement hole 20 in the width direction W so as to block the wires or busbars extending in the thickness direction T.

[0072] Preferably, if Figures 3 to 6As shown, at least one group of baffle portions can be respectively arranged at both ends of the above-mentioned insulating bracket 2 in the width direction W, and each baffle portion group can include at least two baffle portions 22 spaced apart along the width direction W. In this way, a wire groove is formed between two adjacent baffle portions 22 in the baffle group to facilitate the limiting of the wires and the bus of the battery module, so as to further reduce the probability of leakage, short circuit and the like caused by accidental touch of the electrical connection body 1.

[0073] Preferably, if Figure 3 As shown, the placement hole 20 may be a square hole to adapt to the shape of the electrical connection body 1, but is not limited thereto. As long as the electrical connection body 1 can cover the tab 41, the placement hole 20 may also be a round hole, an elliptical hole, other polygonal holes or other special-shaped holes.

[0074] Preferably, if Figures 1 to 6 As shown in the figure, the battery cell 4 is an example of a square battery cell 4, and correspondingly, the insulating support 2 can be a rectangular parallelepiped. However, it is not limited to this, and the shape of the insulating support 2 can be adaptively adjusted according to the shape of the battery cell 4. For example, if the battery cell 4 is a cylindrical battery cell 4, the insulating support 2 can be cylindrical.

[0075] Preferably, if Figures 3 to 6 As shown, the above-mentioned insulating bracket 2 may further include a limiting component, which is arranged on the side wall of the insulating bracket 2 to fix the insulating bracket 2.

[0076] Preferably, if Figures 3 to 6 As shown, the above-mentioned limiting assembly may include a limiting protrusion 231. Optionally, the limiting protrusion 231 may be a dovetail-shaped protrusion extending along the length direction L.

[0077] Preferably, if Figures 3 to 6 As shown, the above-mentioned limiting assembly may include a limiting groove 232. Optionally, the limiting groove 232 may be a dovetail groove extending along the length direction L.

[0078] Preferably, if Figures 3 to 6 As shown, the above-mentioned limiting protrusion 231 is provided on one side of the above-mentioned insulating bracket 2 in the thickness direction T, and the above-mentioned limiting groove 232 is provided on the other side of the above-mentioned insulating bracket 2 in the thickness direction T, so that when multiple battery cells 4 are stacked along the thickness direction T, two adjacent battery cells 4 can be plugged in through the limiting protrusion 231 and the limiting groove 232 on the corresponding two sides of the insulating bracket 2, thereby realizing the sequential fixation of the multiple battery cells 4 in the thickness direction T.

[0079] Similarly, if Figure 6As shown, the above-mentioned limiting protrusion 231 is provided on one side of the above-mentioned insulating bracket 2 in the width direction W, and the above-mentioned limiting groove 232 is provided on the other side of the above-mentioned insulating bracket 2 in the width direction W. In this way, when multiple battery cells 4 are arranged side by side along the width direction W, two adjacent battery cells 4 can be plugged in through the limiting protrusion 231 and the limiting groove 232 on the side surfaces of the two corresponding insulating brackets 2, thereby realizing the sequential fixation of the multiple battery cells 4 in the width direction W.

[0080] Optionally, the insulating bracket 2 may be made of a hard insulating material, for example, hard plastics such as ABS plastic and PC plastic, or epoxy resin, mica board, etc.

[0081] Optionally, the insulating bracket 2 may be made of hard plastic by integral injection molding to ensure the insulation and supporting strength of the insulating bracket 2 .

[0082] See also Figures 4 to 6 The embodiment of the second aspect of the present application further provides a battery module, comprising the above-mentioned battery cell 4 and the battery cell connection structure described in any of the above-mentioned embodiments, and thus having all the beneficial technical effects of the battery cell connection structure, which will not be repeated here.

[0083] Preferably, if Figure 5 and Figure 6 As shown, the battery module may include a plurality of battery cell groups arranged side by side along the width direction W, and each battery cell group includes a plurality of battery cells 4 stacked along the thickness direction T.

[0084] Preferably, if Figure 6 As shown, the two adjacent battery cell groups are fixedly connected via the limiting protrusion 231 and the limiting groove 232 .

[0085] Optionally, the battery cell 4 may be a soft-pack battery cell. Figures 4 to 6 As shown, the battery module may further include a buffer layer 5, and at least one layer of the buffer layer 5 is provided on both sides of each battery cell 4 in the thickness direction T, so as to reduce the impact / vibration of the soft-pack battery cell during the use of the battery module, provide a "breathing" space for the soft-pack battery cell during the charge and discharge process, and provide the most suitable pressure or buffer for the soft-pack battery cell during use or transportation.

[0086] Optionally, the buffer layer 5 may be made of flexible materials such as foam, EVA, PU, ​​rubber, etc.

[0087] Optionally, the thickness of the buffer layer 5 may be 0.5 mm to 5 mm.

[0088] like Figures 1 to 6An example is shown in which the pole tabs 41 of the battery cell 4 are led out from the same end in the length direction L. However, it is not limited to this. The pole tabs 41 of the battery cell 4 at both ends in the length direction L can be led out respectively. Correspondingly, the battery cell connection structure can be provided at both ends in the length direction L.

[0089] Preferably, the dimension of the pole tab 41 in the thickness direction T may be 0.1 mm to 0.6 mm, so as to ensure the stability of the pole tab 41 being clamped by the two clamping parts 11 , that is, to ensure that the clamping gap can accommodate and clamp the pole tab 41 .

[0090] Based on the characteristics described above, Figures 1 to 6 The battery cell and battery module shown are described as an example, and the beneficial effects of the battery cell connection structure and battery module provided by the present application will be described in detail below:

[0091] 1. The quick-insertion part, the connection part and the clamping part of the electrical connection body form a passage for electrical connection with the tab of the battery cell. When the battery cell needs to be electrically connected to the outside, the quick-insertion part can be used to quickly connect with the external electrical connection structure, so that the assembly of the battery cell and the battery module is no longer limited by welding equipment, thereby improving the assembly flexibility of the battery cell and the battery module;

[0092] 2. The structure of the quick-insert part is used to realize the reusability of the electrical connection structure, thereby improving the convenience and speed of the electrical connection of the battery core connection structure;

[0093] 3. The insulation of the electrical connection body is achieved by embedding the electrical connection body in the placement hole of the insulating bracket;

[0094] 4. A baffle portion protruding relative to the surface of the insulating bracket is provided on the top surface between the insulation, so as to effectively prevent the redundant parts of the external electrical connection structure (for example, redundant wires) from accidentally touching the electrical connection body, reduce the probability of leakage, short circuit, etc. of the electrical connection body due to accidental contact, and plan and fix the routing of the external electrical connection structure through the baffle portion;

[0095] 5. A limiting component for fixing the insulating bracket is provided on the side wall of the insulating bracket, so that the battery cell can be fixed by the limiting component. For example, adjacent battery cells in the battery module can be connected by corresponding limiting components to achieve connection and fixation between adjacent battery cells, thereby improving the stability of the battery module.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cell connection structure, characterized in that: Used for external electrical connection of the battery cell, the battery cell connection structure comprises an electrical connection body and an insulating bracket, the insulating bracket can be fixedly arranged at the end of the battery cell, the insulating bracket is provided with an installation hole penetrating the insulating bracket along a first direction, and the electrical connection body is fixed in the installation hole; The electrical connection body comprises a quick-insertion portion, a connection portion and at least two clamping portions, wherein the clamping portion comprises a first end and a second end arranged opposite to each other in the first direction, at least two of the clamping portions are arranged at intervals along the second direction, and the first ends of the clamping portions are both connected to the connection portion, so that a clamping gap capable of clamping the tab of the battery cell is formed between two adjacent clamping portions, and the second direction intersects with the first direction; The quick-insertion part is fixedly arranged on the connection part, and is used for external electrical connection of the electrical connection body.

2. The battery cell connection structure according to claim 1, characterized in that: The number of the clamping parts is two, and the two clamping parts are respectively fixed to two ends of the connecting part in the second direction.

3. The battery cell connection structure according to claim 2, characterized in that: The clamping portion is provided with a clamping protrusion, and the clamping protrusion protrudes from the outer side of the clamping portion to the middle of the clamping gap along the second direction.

4. The battery cell connection structure according to claim 3, characterized in that: The number of the clamping protrusions is one or more; When there are multiple clamping protrusions, the multiple clamping protrusions are arranged at intervals along the first direction.

5. The battery cell connection structure according to claim 2, characterized in that: The clamping portion further comprises a guide portion, and the guide portion is located at the second end of the clamping portion; In the first direction, one end of the guide portion close to the connecting portion points to the other end, and the guide portion gradually inclines toward the outside of the clamping gap.

6. The battery cell connection structure according to claim 2, characterized in that: The quick-insertion portion is arranged on a side of the connecting portion facing the clamping portion, and is arranged in the clamping gap; The connecting portion is provided with a connecting hole penetrating the connecting portion, and the quick-insertion portion is provided with a plug hole extending along the first direction, and the plug hole is butted against the connecting hole.

7. The battery cell connection structure according to any one of claims 1 to 6, characterized in that: The insulating bracket is provided with one or more placement holes; The insulating bracket further includes a positioning beam extending along a third direction, each of the placement holes is provided with the positioning beam, and two ends of the positioning beam in the third direction are respectively fixedly connected to the inner wall of the placement hole; The two clamping portions can be respectively inserted into the placement hole from both sides of the positioning beam in the second direction, and the third direction intersects with the second direction.

8. The battery cell connection structure according to any one of claims 1 to 6, characterized in that: The insulating support further includes a blocking piece portion arranged along the edge of the placement hole. The blocking piece portion is arranged on a side of the insulating support facing away from the battery core and protrudes relative to a surface of the insulating support.

9. The battery cell connection structure according to claim 1, characterized in that: The insulating support further comprises a limiting assembly, wherein the limiting assembly is arranged on a side wall of the insulating support to fix the insulating support; The limiting assembly includes a limiting protrusion and / or a limiting groove.

10. A battery module, characterized in that: The invention comprises the battery cell and the battery cell connection structure according to any one of claims 1 to 9.

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