Connecting device, battery cell and electronic equipment

Abstract

The utility model relates to the technical field of electronic equipment, in particular to a connecting device, a battery cell and electronic equipment. The connecting device comprises a first connecting part and a second connecting part. The second connecting part is used for connecting a cable; the first connecting part is used for limiting connection with a side groove of an electrode; the first connecting member is connected to the second connecting member such that the second connecting member is brought into contact with an end surface of the electrode to electrically connect the cable to the electrode. According to the utility model, the second connecting part used for connecting the cable is arranged, the first connecting part used for being connected with the side surface groove of the electrode in a limiting manner is arranged, and the first connecting part is connected with the second connecting part, so that the cable can be electrically connected with the electrode in a welding-free manner; the problem that in the prior art, a battery cell and a cable are difficult to weld is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic devices, in particular to a connecting device, a battery cell and an electronic device. Background Art

[0002] Battery cells, such as square aluminum shell battery cells, have a high penetration rate in China due to advantages such as high safety, excellent heat dissipation performance and high energy density. At present, there are mainly two types of connection methods between battery cells and cables: one is to first weld the cable to a metal sheet, and then weld the metal sheet to the electrode by laser. This method cannot achieve flexible disassembly and assembly of the electrode and the cable. At the same time, the welding of the metal sheet and the electrode has high requirements for the flatness of the sheet, which is easy to deform during transportation, resulting in great difficulty in controlling the quality of incoming materials and serious waste; it is necessary to specify the laser intensity according to the material, thickness, etc. of the metal sheet, resulting in difficult control of the welding process. The other is to weld a stud to the electrode by laser, and then connect the cable and the electrode through an OT / OC terminal. This method can achieve flexible disassembly and assembly of the cable and the electrode, but there is still a problem of difficult control of the welding process. Therefore, how to overcome the welding difficulty between the battery cell and the cable is an urgent problem to be solved in the industry. Summary of the Utility Model

[0003] The utility model provides a connecting device, a battery cell and an electronic device to solve the problem of difficult welding between the battery cell and the cable in the prior art.

[0004] In the first aspect of the utility model, a connecting device is provided, including:

[0005] A second connecting component for connecting a cable;

[0006] A first connecting component for limiting connection with a side groove of an electrode;

[0007] The first connecting component is connected to the second connecting component, so that the second connecting component abuts against the end face of the electrode to electrically connect the cable and the electrode.

[0008] According to the connecting device provided by the utility model, the first connecting component includes:

[0009] A first base connected to the second connecting component; the first base has a first hollow area for accommodating the electrode;

[0010] A first connecting assembly arranged around the axis of the first hollow area and connected to the first base, and the first connecting assembly is used for limiting connection with the side groove.

[0011] According to the connecting device provided by the utility model, the first connecting assembly includes:

[0012] At least two of the first connecting members are arranged axially around the first hollow area and are movably connected to the first base; the first connecting member has a first position and a second position; in the first position, the first connecting member is separated from the electrode; in the second position, the first connecting member is limitedly connected to the side groove;

[0013] A locking member is disposed on the first base and is used to lock the first connecting member in the second position.

[0014] According to the connecting device provided by the utility model, the first base is provided with a first slide rail along the radial direction of the first hollow area; the first connecting member is slidably matched with the first slide rail, and the first connecting member includes a connecting column and a connecting plate; the connecting plate is arranged at one end of the connecting column, and is used to be limitedly connected with the side groove.

[0015] According to the connection device provided by the utility model, the first connection component also includes:

[0016] A driving connection component, wherein an installation gap is formed between the first base and the second connection component, the driving connection component is located in the installation gap and is connected to the first connection member, and is used to drive the first connection member to slide along the first slide rail to the second position.

[0017] According to the connection device provided by the utility model, the drive connection assembly includes:

[0018] A second connecting member having a second hollow area, wherein the second hollow area corresponds to the first hollow area;

[0019] At least two guide members are arranged axially around the first hollow area and correspond one-to-one to the first connecting member; along the radial direction of the first hollow area, the guide member is provided with a second slide rail, and the connecting column is slidably matched with the second slide rail.

[0020] According to the connection device provided by the utility model, the drive connection assembly also includes:

[0021] An operating rod, one end of which is connected to the guide member and / or the second connecting member, and the other end of which extends out of the installation gap.

[0022] According to the connecting device provided by the utility model, a conductive protrusion is formed on the side of the second connecting component facing the electrode, and the conductive protrusion is used to abut against the end face of the electrode; a mounting groove is formed on the side of the conductive protrusion away from the electrode; a connecting threaded hole is formed in the mounting groove, and a screw is installed in the connecting threaded hole, and the screw is used to install the cable in the mounting groove.

[0023] In a second aspect of the present utility model, a battery cell is provided, which includes an electrode and the connection device described in any one of the above; the connection device is used to electrically connect the electrode to a cable.

[0024] In a third aspect of the present utility model, an electronic device is provided, which includes an electronic device body and the battery cell described above; the battery cell is connected to the electronic device body.

[0025] The connection device, battery cell and electronic device provided by the present utility model can electrically connect a cable to an electrode in a welding-free manner by providing a second connection component for connecting the cable and a first connection component for limiting connection with a side groove of the electrode, and connecting the first connection component to the second connection component, effectively solving the problem of difficult welding between the battery cell and the cable in the prior art. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is an assembly structure schematic diagram of the connection device provided by the present utility model.

[0028] Figure 2 is Figure 1 a cross-sectional structure schematic diagram of the A-A section in

[0029] Figure 3 It is a structure schematic diagram of the connection device provided by the present utility model with the second connection component hidden.

[0030] Figure 4 It is a structure schematic diagram of the connection device provided by the present utility model with the second connection component and the first base hidden.

[0031] Figure 5 It is a structure schematic diagram of the battery cell provided by the present utility model.

[0032] Figure 6 is Figure 5 an enlarged structure schematic diagram at B in

[0033] Reference Signs:

[0034] 10. Connection device; 20. Electrode; 21. End face; 22. Side groove; 30. Battery cell main body;

[0035] 100. First connecting component; 110. First base; 111. First hollow area; 112. First slide rail; 120. First connecting assembly; 121. First connecting piece; 1211. Connecting column; 1212. Connecting plate; 122. Locking piece; 1221. Gear; 1222. Elastic piece; 130. Driving connection assembly; 131. Second connecting piece; 1311. Second hollow area; 132. Guide piece; 1321. Second slide rail; 133. Operating rod;

[0036] 200. Second connecting component; 210. Conductive protrusion; 220. Installation groove; 230. Second base;

[0037] 300. Installation gap. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model fall within the protection scope of the present utility model.

[0039] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present utility model 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 thus cannot be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connection" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0041] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0043] The following Figures 1 to 4 will make a detailed description of the connecting device of the present utility model. Among them, Figure 1 is the schematic assembly structure diagram of the connecting device provided by the present utility model. Figure 2 is Figure 1 the schematic cross-sectional structure diagram of the A-A section in Figure 3 is the schematic structure diagram of the connecting device provided by the present utility model hiding the second connecting component. Figure 4 is the schematic structure diagram of the connecting device provided by the present utility model hiding the second connecting component and the first base.

[0044] As Figure 1 and Figure 2 shown, the first aspect of the present utility model provides a connecting device 10. The connecting device 10 includes a first connecting component 100 and a second connecting component 200; the second connecting component 200 is used for connecting a cable; the first connecting component 100 is used for limiting and connecting with the side groove 22 of the electrode 20; the first connecting component 100 is connected with the second connecting component 200, so that the second connecting component 200 abuts against the end face 21 of the electrode 20, so as to electrically connect the cable with the electrode 20.

[0045] In this embodiment, by providing a second connecting component 200 for connecting the cable, and by providing a first connecting component 100 for limiting connection with the side groove 22 of the electrode 20, and the first connecting component 100 is connected to the second connecting component 200, the cable and the electrode 20 can be electrically connected in a welding-free manner, which effectively solves the problem of difficulty in welding the battery cell and the cable in the prior art.

[0046] Preferably, the first connecting member 100 and the second connecting member 200 are detachably connected. The detachable connection between the first connecting member 100 and the second connecting member 200 enables the cable and the electrode 20 to be flexibly disassembled.

[0047] Specifically, the first connecting component 100 is provided with a first threaded hole, and the second connecting component 200 is provided with a second threaded hole. The first threaded hole corresponds to the second threaded hole one by one, and the screw is threadedly connected to the first threaded hole and the second threaded hole to achieve a detachable connection between the first connecting component 100 and the second connecting component 200.

[0048] It should be noted that the detachable connection between the first connecting component 100 and the second connecting component 200 includes but is not limited to threaded connection, and may also be a snap connection.

[0049] It should be noted that the electrode 20 is a standard part, the end surface 21 of the electrode 20 is a conductive area, and the side surface of the electrode 20 is a non-conductive area. This embodiment can achieve electrical connection between the electrode 20 and the cable without changing the electrode 20, and ensure flexible removal of the cable.

[0050] like Figure 2 As shown, in some embodiments, a conductive protrusion 210 is formed on the side of the second connecting component 200 facing the electrode 20, and the conductive protrusion 210 is used to abut against the end surface 21 of the electrode 20; a mounting groove 220 is formed on the side of the conductive protrusion 210 away from the electrode 20; the mounting groove 220 is provided with a connecting threaded hole, and a screw is installed in the connecting threaded hole, and the screw is used to install the cable in the mounting groove 220. The cable is set in the mounting groove 220 by the screw, and the conductive protrusion 210 can realize the electrical connection between the cable and the electrode 20. In addition, the conductive protrusion 210 also forms an installation gap 300 between the second connecting component 200 and the first connecting component 100.

[0051] Specifically, the second connecting component 200 includes a second base 230; the conductive protrusion 210 is integrally formed in the middle of the second base 230, and the second base 230 is detachably connected to the first connecting component 100. The second base 230 and the conductive protrusion 210 are integrally supplied, which is convenient for material management.

[0052] Specifically, OT / OC terminals are usually provided at the ends of the cables. The OT / OC terminals are installed in the installation groove 220 through screws to achieve the electrical connection of the conductive protrusions 210 of the cables.

[0053] As Figure 3 shown, in some embodiments, the first connection component 100 includes a first base 110 and a first connection assembly 120.

[0054] Among them, the first base 110 is connected to the second connection component 200; the first base 110 has a first hollow area 111, and the first hollow area 111 is used to accommodate the electrode 20; the first connection assembly 120 is arranged around the axis of the first hollow area 111 and is connected to the first base 110. The first connection assembly 120 is used for limited connection with the side groove 22.

[0055] In this embodiment, by accommodating the electrode 20 in the first hollow area 111, arranging the first connection assembly 120 around the axis of the first hollow area 111, and the first connection assembly 120 is in limited connection with the side groove 22 of the electrode 20, the connection stability between the first connection component 100 and the electrode 20 is improved. Because the first connection assembly 120 is in limited connection with the side groove 22 and is also connected to the first base 110, the first base 110 does not need to be connected to the battery cell main body 30, which simplifies the assembly method of the connection device 10.

[0056] In some embodiments, the first connection assembly 120 is located within the first hollow area 111, and the end of the first connection assembly 120 facing away from the electrode 20 is connected to the first base 110. When the first base 110 is sleeved on the electrode 20, the first connection assembly 120 is inserted into the side groove 22 of the electrode 20, thereby connecting the first base 110 and the electrode 20. Preferably, the first connection assembly 120 is in interference fit with the side groove 22 to prevent the first connection component 100 and the electrode 20 from separating during handling or transportation.

[0057] As Figure 3 shown, in some other embodiments, the first connection assembly 120 includes at least two first connection members 121 and a locking member 122.

[0058] Among them, the first connection members 121 are arranged around the axis of the first hollow area 111 and are movably connected to the first base 110; the first connection members 121 have a first position and a second position; in the first position, the first connection members 121 are separated from the electrode 20; in the second position, the first connection members 121 are in limited connection with the side groove 22. The locking member 122 is arranged on the first base 110 and is used to lock the first connection members 121 in the second position.

[0059] In this embodiment, by axially arranging the first connecting member 121 around the first hollow area 111, the connection stability between the first connecting component 100 and the electrode 20 can be improved. By movably connecting the first connecting member 121 with the first base 110, and the first connecting member 121 having a first position and a second position, a detachable connection between the first connecting component 100 and the electrode 20 can be achieved. By providing the locking member 122, the first connecting member 121 can be locked in the second position, preventing the separation of the first connecting component 100 and the electrode 20 during handling or transportation.

[0060] In some embodiments, each first connecting member 121 can be individually moved from the first position to the second position, and then each first connecting member 121 can be locked in the second position by the locking member 122.

[0061] As Figure 2 and Figure 3 shown, in some embodiments, along the radial direction of the first hollow area 111, the first base 110 is provided with a first slide rail 112; the first connecting member 121 is slidably engaged with the first slide rail 112, and the first connecting member 121 includes a connecting column 1211 and a connecting plate 1212; the connecting plate 1212 is disposed at one end of the connecting column 1211 and is used for limited connection with the side groove 22.

[0062] In this embodiment, by providing the first slide rail 112 on the first base 110, a guiding effect can be exerted on the first connecting member 121, enabling the first connecting member 121 to move along the first slide rail 112 between the first position and the second position. By providing the connecting column 1211 connected to the connecting plate 1212, it is convenient to operate the first connecting member 121 to switch the first connecting member 121 between the first position and the second position. Additionally, by providing the connecting plate 1212, the contact area between the first connecting member 121 and the side groove 22 can be increased, improving the connection stability.

[0063] Further, a front thorn structure is formed on the side of the connecting plate 1212 facing the side groove 22 to better fit with the side groove 22, ensuring that the connecting device 10 and the electrode 20 are firmly fixed.

[0064] Further, the connecting column 1211 includes a first section and a second section; the first section and the second section are integrally formed coaxially; the diameter of the first section is larger than that of the second section, forming a limiting structure such that the first section is located on the upper surface of the first base 110. One end of the second section away from the first section is connected to the connecting plate 1212.

[0065] Further, the projection of the connecting column 1211 on the horizontal plane is covered by the projection of the connecting plate 1212 on the horizontal plane.

[0066] As Figure 1 、 Figure 3and Figure 4 As shown, in some embodiments, the first connection component 100 further includes a driving connection assembly 130; an installation gap 300 is formed between the first base 110 and the second connection component 200, the driving connection assembly 130 is located in the installation gap 300, and is connected to the first connection member 121 for driving the first connection member 121 to slide along the first slide rail 112 to the second position. Specifically, an installation gap 300 is formed between the first base 110 and the second base 230, the driving connection assembly 130 is located in the installation gap 300, and is connected to the first connection member 121. All the first connection members 121 can be synchronously driven to move to the second position through the driving connection assembly 130, which simplifies the installation steps and improves the installation efficiency.

[0067] Furthermore, the locking member 122 can lock all the first connection members 121 in the second position by locking the driving connection assembly 130, which simplifies the structure of the connection device 10.

[0068] As Figure 4 shown, in some embodiments, the driving connection assembly 130 includes a second connection member 131 and at least two guiding members 132.

[0069] Among them, the second connection member 131 has a second hollow area 1311, and the second hollow area 1311 corresponds to the first hollow area 111; at least two guiding members 132 are arranged around the axis of the first hollow area 111 and correspond to the first connection members 121 one by one; along the radial direction of the first hollow area 111, the guiding member 132 is provided with a second slide rail 1321, and the connecting column 1211 is slidably matched with the second slide rail 1321. Specifically, the conductive protrusion 210 of the second connection component 200 is received in the second hollow area 1311 and abuts against the end face 21 of the electrode 20 located in the first hollow area 111.

[0070] In this embodiment, by providing the second connection member 131, a plurality of guiding members 132 can be connected together. By providing the second slide rail 1321, when the second connection member 131 rotates, a plurality of guiding members 132 can rotate synchronously. At the same time, the connecting column 1211 is in the second slide rail 1321, and the connecting plate 1212 moves towards the side groove 22 of the electrode 20 in the first slide rail 112 until the connecting plate 1212 is limited and connected to the side groove 22.

[0071] Furthermore, the second connection member 131 and the guiding member 132 are integrally formed, which is convenient for material management.

[0072] Furthermore, the projection of the second connection member 131 on the horizontal plane can be circular, square, diamond-shaped, etc. Preferably, the second connection member 131 is in the shape of a ring.

[0073] AsFigure 3 As shown, in some embodiments, a gear 1221 is formed on a side of the second connecting member 131 away from the side groove 22; a spring piece 1222 is provided on the first base 110, and the spring piece 1222 is meshed and connected with the gear 1221, so that the first connecting member 121 rotates unidirectionally relative to the first base 110. That is to say, the gear 1221 and the spring piece 1222 can be used as a locking member 122 to lock the first connecting member 121 in the second position. Specifically, the gear 1221 and the spring piece 1222 interact with each other to make the driving connection assembly 130 rotate unidirectionally. When the driving connection assembly 130 rotates in the reverse direction, the gear 1221 will receive a reaction force from the spring piece 1222, which hinders the movement.

[0074] In some embodiments, the driving connection assembly 130 further includes an operating rod 133; one end of the operating rod 133 is connected to the guiding member 132 and / or the second connecting member 131, and the other end extends out of the installation gap 300. By providing the operating rod 133, it is convenient to synchronously drive the movement of the first connecting member 121.

[0075] Preferably, the operating rod 133 is connected to a side of the guiding member 132 away from the second connecting member 131.

[0076] The assembly process of the connecting device 10 in this embodiment is as follows: push the first connecting member 121 into the first base 110 along the first slide rail 112; install the driving connection assembly 130 on the first base 110. At this time, the connecting column 1211 of the first connecting member 121 is located in the second slide rail 1321 of the driving connection assembly 130, and at the same time, the gear 1221 is in contact with the spring piece 1222; install the second base 230 on the first base 110 so that the driving connection assembly 130 is located in the installation gap 300.

[0077] During use, the driving connection assembly 130 is rotated through the operating rod 133, and the connecting column 1211 is squeezed by the second slide rail 1321 and moves toward the side groove 22 of the electrode 20 until the connecting plate 1212 is stuck in the side groove. At this time, the conductive protrusion 210 of the second connecting member 200 abuts against the end face 21 of the electrode 20. The OT / OC terminal of the cable is detachably installed in the installation groove through a screw to realize the physical connection between the cable and the electrode, and at the same time, the cable is electrically connected to the electrode.

[0078] As Figure 5 and Figure 6 shown, a specific embodiment of the second aspect of the present invention provides an electric core. The electric core includes an electrode 20 and the connecting device 10 in any of the above embodiments; the connecting device 10 is used to electrically connect the electrode 20 with a cable.

[0079] In this embodiment, the connecting device 10 of any of the above embodiments is used to connect the cable to the electrode 20, which can realize the non-welding connection between the cable and the electrode 20, and effectively solve the problem of the welding difficulty between the cable and the electrode 20 in the prior art.

[0080] In some embodiments, the battery cell further includes a battery cell main body 30; the electrode 20 is disposed on the battery cell main body 30; the end face 21 of the electrode 20 facing away from the battery cell main body 30 is a conductive region, and a side groove 22 is formed around the central axis of the electrode 20 on the side surface of the electrode 20.

[0081] It can be understood that the first connecting component 100 of the connecting device 10 can be connected to the side groove 22 of the electrode 20 in a limiting manner, or can be connected to the battery cell main body 30.

[0082] In some embodiments, the battery cell includes a cylindrical battery cell, a square aluminum shell battery cell or a blade battery cell. Preferably, the battery cell is a square aluminum shell battery cell.

[0083] In a specific embodiment of the third aspect of the present invention, an electronic device is provided. The electronic device includes an electronic device body and the battery cell of any of the above embodiments; the battery cell is connected to the electronic device body.

[0084] Since this embodiment includes the battery cell of any of the above embodiments, it has at least the above advantages, which will not be elaborated here.

[0085] In some embodiments, the electronic device includes but is not limited to a battery, a battery pack or a battery module.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A connection device, characterized in that: include: A second connecting component (200) for connecting a cable; A first connecting component (100) is used for being positionally connected to a side groove (22) of the electrode (20); The first connecting component (100) is connected to the second connecting component (200), so that the second connecting component (200) abuts against an end surface (21) of the electrode (20), thereby electrically connecting the cable to the electrode (20).

2. The connection device according to claim 1, characterized in that: The first connecting component (100) comprises: A first base (110) connected to the second connecting component (200); the first base (110) has a first hollow area (111), and the first hollow area (111) is used to accommodate the electrode (20); A first connection component (120) is arranged axially around the first hollow area (111) and connected to the first base (110), and the first connection component (120) is used for being connected to the side groove (22) in a limiting manner.

3. The connection device according to claim 2, characterized in that: The first connection component (120) comprises: At least two first connecting members (121) are arranged axially around the first hollow area (111) and are movably connected to the first base (110); the first connecting member (121) has a first position and a second position; in the first position, the first connecting member (121) is separated from the electrode (20); in the second position, the first connecting member (121) is positionally connected to the side groove (22); A locking member (122) is arranged on the first base (110) and is used to lock the first connecting member (121) at the second position.

4. The connection device according to claim 3, characterized in that: Along the radial direction of the first hollow area (111), the first base (110) is provided with a first slide rail (112); the first connecting member (121) is slidably matched with the first slide rail (112), and the first connecting member (121) includes a connecting column (1211) and a connecting plate (1212); the connecting plate (1212) is arranged at one end of the connecting column (1211) and is used for limiting connection with the side groove (22).

5. The connection device according to claim 4, characterized in that: The first connecting component (100) further comprises: A driving connection component (130), wherein an installation gap (300) is formed between the first base (110) and the second connection component (200), and the driving connection component (130) is located in the installation gap (300) and is connected to the first connection member (121), and is used to drive the first connection member (121) to slide along the first slide rail (112) to the second position.

6. The connection device according to claim 5, characterized in that: The drive connection assembly (130) comprises: A second connecting member (131) having a second hollow area (1311), wherein the second hollow area (1311) corresponds to the first hollow area (111); At least two guide members (132) are arranged axially around the first hollow area (111) and correspond one-to-one to the first connecting member (121); along the radial direction of the first hollow area (111), the guide member (132) is provided with a second slide rail (1321), and the connecting column (1211) is slidably matched with the second slide rail (1321).

7. The connection device according to claim 6, characterized in that: The drive connection assembly (130) further comprises: An operating rod (133), one end of which is connected to the guide member (132) and / or the second connecting member (131), and the other end of which extends out of the installation gap (300).

8. The connection device according to any one of claims 1 to 7, characterized in that: A conductive protrusion (210) is formed on the side of the second connecting component (200) facing the electrode (20), and the conductive protrusion (210) is used to abut against the end surface (21) of the electrode (20); a mounting groove (220) is formed on the side of the conductive protrusion (210) facing away from the electrode (20); the mounting groove (220) is provided with a connecting threaded hole, and a screw is installed in the connecting threaded hole, and the screw is used to install the cable in the mounting groove (220).

9. A battery cell, characterized in that: It comprises an electrode (20) and a connecting device (10) according to any one of claims 1 to 8; the connecting device (10) is used to electrically connect the electrode (20) to a cable.

10. An electronic device, characterized in that: It comprises an electronic device body, and the battery core as claimed in claim 9; the battery core is connected to the electronic device body.

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