Riveting components, riveting devices and battery module production equipment

Abstract

The present application discloses a riveting assembly, a riveting device, and a production equipment for a battery module, wherein the riveting assembly includes: a mounting seat; a rivet gun, which can move from a first position to a second position along a first direction relative to the mounting seat; an elastic member, which is retractable along a second direction, the second direction intersecting with the first direction, the first end of the elastic member along the second direction being connected to the mounting seat, the second end of the elastic member along the second direction being connected to the rivet gun, and the second end of the elastic member being movable along the first direction relative to the first end of the elastic member, so that the rivet gun can move between the first position and the second position. The riveting assembly of the present application enables the rivet gun to be movable relative to the mounting seat by providing an elastic member. During the process of the rivet gun abutting the rivet gun, the rivet gun can quickly and accurately dock with the rivet member to improve the reliability of the riveting. The riveting assembly of the present application has the advantages of simple structure, easy operation, and being conducive to improving riveting efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and more specifically, to a riveting assembly, a riveting device including the riveting assembly, and production equipment for a battery module including the riveting device. Background Art

[0002] During the manufacturing process of battery modules, busbars are required to connect the cells in the module in series or parallel. Typically, the busbars are connected to the battery module using rivets. For example, the busbars can be mounted on rivet studs, which are then heated to 240° using a rivet gun to quickly melt the studs and secure the busbar to the side of the module.

[0003] In traditional technology, a rivet gun is usually installed on a robot arm, which drives the rivet gun to hot rivet the rivet posts one by one. In other words, a single rivet post needs to be hot riveted before the next rivet post can be hot riveted, resulting in low riveting efficiency.

[0004] In the prior art, if multiple rivet guns are used to rivet multiple rivet posts simultaneously, since foam is provided between the battery cells in the battery module and the rivet posts are connected to the battery cells, when the multiple battery cells are assembled together, the spacing between the rivet posts in the arrangement direction of the multiple bus bars is likely to change, making it difficult for the rivet guns to quickly and reliably dock with the rivet posts. Summary of the Invention

[0005] One purpose of the present application is to provide a new technical solution for a riveting assembly, which can solve at least one of the problems in the prior art of low riveting efficiency and difficulty in reliably connecting the rivet gun and the rivet column.

[0006] Another object of the present application is to provide a riveting device, which includes the riveting assembly mentioned above.

[0007] Another object of the present application is to provide a battery module production device, which includes the above-mentioned riveting device.

[0008] According to a first aspect of the present application, a riveting assembly is provided, comprising: a mounting seat; a rivet gun, the rivet gun being movable from a first position to a second position along a first direction relative to the mounting seat; an elastic member, the elastic member being retractable along a second direction, the second direction intersecting with the first direction, the first end of the elastic member along the second direction being connected to the mounting seat, the second end of the elastic member along the second direction being connected to the rivet gun, the second end of the elastic member being movable along the first direction relative to the first end of the elastic member, so as to enable the rivet gun to move between the first position and the second position.

[0009] Optionally, a connecting shaft is provided on a side of the rivet gun close to the mounting seat, and an end of the connecting shaft abuts against the second end of the elastic member.

[0010] Optionally, the mounting base includes: a first connecting base; a second connecting base, the second connecting base is fixedly provided on the surface of the first connecting base facing the rivet gun, a first channel is provided on the side of the second connecting base close to the rivet gun, a second channel is provided on the side of the second connecting base close to the first connecting base, the second channel is connected to the first channel, the elastic member is located in the second channel, and a portion of the connecting shaft passes through the first channel and abuts against the elastic member.

[0011] Optionally, the mounting base further comprises: a third connecting base, the third connecting base being located in the second channel, the third connecting base being provided with a third channel communicating with the first channel, the elastic member being located in the third channel, a portion of the connecting shaft extending into the first channel and abutting against the elastic member located within the third channel. Optionally, the end of the connecting shaft facing the third connecting base comprises a receiving groove, and the riveting assembly further comprises: a first ball bearing, at least a portion of which is movably disposed in the receiving groove, the first ball bearing abutting against the second end of the elastic member.

[0012] Optionally, the accommodating groove is a tapered groove with a gradually increasing cross-sectional area along the direction from the rivet gun to the mounting seat.

[0013] Optionally, the connecting shaft includes a first segment and a second segment connected to each other, the second segment is located on the side of the first segment close to the third connecting seat, the radial dimension of the second segment is larger than the radial dimension of the first segment, and the first channel includes a first hole segment and a second hole segment corresponding to the shapes of the first segment and the second segment respectively, the first segment is located in the first hole segment, the second segment is located in the second hole segment, and the inner surface of the first hole segment is spaced apart from the outer surface of the first segment.

[0014] Optionally, it further includes: second balls, and the second section body is supported in the second hole section by a plurality of the second balls.

[0015] Optionally, the riveting assembly also includes: a third ball, which is located between the first side surface of the second section and the third connecting seat; a fourth ball, which is located between the second side surface of the second section and the second connecting seat; wherein the second section is clamped between the third ball and the fourth ball.

[0016] According to a second aspect of the present application, a riveting device is provided, comprising: a fixing seat; a riveting assembly, wherein the riveting assembly is a riveting assembly according to any of the above descriptions, the mounting seat is arranged on the fixing seat, and when the rivet gun moves from the first position to the second position along the first direction, the rivet gun can correspond to the position of the riveted part.

[0017] Optionally, a pressing block is mounted on the fixing seat, and the pressing block is movable so as to position the riveted part before the riveting gun rivets the riveted part.

[0018] Optionally, the riveting device further includes: a bracket; a movable plate, the movable plate is mounted on the bracket, the fixed seat is provided on the movable plate, the movable plate is movable on the bracket, and / or the fixed plate is movable on the movable plate.

[0019] According to the third aspect of the present application, a battery module production device is provided, including: a carrying platform, the carrying platform is used to support the battery module; a conveying mechanism, the conveying mechanism is used to drive the carrying platform to move; a riveting device, the riveting device is any of the riveting devices described above, and the riveting device is arranged on one side or both sides of the carrying platform.

[0020] Optionally, the production equipment of the battery module also includes: a support; a first driving member and a second driving member, the first driving member and the second driving member are respectively arranged on the support; a first pressure plate, the first pressure plate is connected to the power output end of the first driving member, and the first pressure plate can move toward and away from the top surface of the battery module so that the battery module is clamped between the first pressure plate and the supporting platform; two second pressure plates, the two second pressure plates are respectively arranged on two opposite sides of the battery module, each second pressure plate is arranged at the power output end of the corresponding second driving member, and each second pressure plate can move toward and away from the corresponding side to limit the freedom of the battery module in the second direction.

[0021] According to the riveting assembly of the present application, by connecting the rivet gun to the elastic member and utilizing the second end of the elastic member to be movable relative to the first end of the elastic member, the rivet gun can be moved between a first position and a second position. As a result, during the process of abutting the rivet gun and the riveted member, the rivet gun can be precisely docked with the riveted member, thereby improving the reliability of the riveting. The rivet assembly of the present application, by providing the elastic member, can achieve precise and rapid docking of the rivet gun and the riveted member, and has the advantages of simple structure, easy operation, and improved riveting efficiency.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0024] Figure 1 is a partial structural schematic diagram of a battery module production device according to one embodiment of the present application;

[0025] Figure 2 is a front view of a battery module, a rivet, and a busbar according to an embodiment of the present application;

[0026] Figure 3 is a left side view of a battery module, a rivet, and a busbar according to one embodiment of the present application;

[0027] Figure 4 is a top view of a battery module, a rivet, and a busbar according to an embodiment of the present application;

[0028] Figure 5 is a top view of a riveting device according to an embodiment of the present application;

[0029] Figure 6 is a front view of a riveting device according to an embodiment of the present application;

[0030] Figure 7 is a perspective view of a partial structure of a riveting device according to an embodiment of the present application;

[0031] Figure 8 is a front view of a riveting assembly according to one embodiment of the present application;

[0032] Figure 9 is a top view of a riveted assembly according to one embodiment of the present application;

[0033] Figure 10 yes Figure 9 Cross-sectional view of AA;

[0034] Figure 11 yes Figure 10 A partial enlarged view of middle B;

[0035] Figure 12 is a front view of a second positioning assembly according to one embodiment of the present application;

[0036] Figure 13 is a top view of a second positioning assembly according to one embodiment of the present application.

[0037] Reference numerals

[0038] Riveting device 100;

[0039] Riveting assembly 10;

[0040] Mounting base 11; first connecting base 111; second connecting base 112; first channel 1121; second channel 1122; third connecting base 113; third channel 1131;

[0041] elastic member 12;

[0042] Rivet gun 13; rivet gun head 131; arc-shaped groove 1311;

[0043] Connecting shaft 14; accommodating groove 141; first section 142; second section 143; first ball 15; second ball 16; third ball 17; fourth ball 18;

[0044] Bracket 20;

[0045] Briquetting 30;

[0046] Fixed seat 40;

[0047] Slide rail 50;

[0048] Moving plate 60;

[0049] Adjusting cylinder 70;

[0050] Driving cylinder 80;

[0051] Carrying platform 200;

[0052] Second positioning assembly 300; support 301; first driving member 3021; ​​second driving member 3022; first pressing plate 3031; second pressing plate 3032;

[0053] Image acquisition terminal 400;

[0054] Battery module 500; battery cell 501;

[0055] Riveted parts 600;

[0056] Busbar 700. DETAILED DESCRIPTION

[0057] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0058] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0059] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0060] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0061] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0062] The following first describes in detail the riveting assembly 10 according to an embodiment of the present application with reference to the accompanying drawings.

[0063] like Figures 1 to 13 As shown, the riveting assembly 10 according to the embodiment of the present application includes a mounting seat 11 , an elastic member 12 and a rivet gun 13 .

[0064] Specifically, the rivet gun 13 can move from a first position to a second position along a first direction relative to the mounting seat 11, the elastic member 12 is retractable along the second direction, the second direction intersects with the first direction, the first end of the elastic member 12 along the second direction is connected to the mounting seat 11, the second end of the elastic member 12 along the second direction is connected to the rivet gun 13, and the second end of the elastic member 12 is movable along the first direction relative to the first end of the elastic member 12 so that the rivet gun 13 moves between the first position and the second position.

[0065] In other words, the riveting assembly 10 according to the embodiment of the present application is mainly composed of a mounting base 11, an elastic member 12 and a rivet gun 13. The rivet gun 13 can be connected to the mounting base 11 through the elastic member.

[0066] Specifically, the rivet gun 13 can move between two positions relative to the mounting base 11 along a first direction. That is, the rivet gun 13 can float relative to the mounting base 11 in the first direction. The elastic member 12 can expand and contract along a second direction. In the expansion and contraction direction of the elastic member 12, one end of the elastic member 12 is directly or indirectly connected to the mounting base 11, and the other end of the elastic member 12 is directly or indirectly connected to the rivet gun 13. The second direction intersects the first direction. For example, the first direction can be perpendicular to the second direction. For ease of explanation, the first direction can be defined as the Z-axis direction, and the second direction can be defined as the X-axis direction.

[0067] In addition, the second end of the elastic member 12 is movable relative to the first end of the elastic member 12 along the first direction, that is, the elastic member 12 is movable in the floating direction of the rivet gun 13, so that the rivet gun 13 can move between two positions.

[0068] The rivet gun 13 of the present application is described below with reference to specific embodiments.

[0069] For ease of illustration, the rivet gun 13 and the elastic member 12 are arranged horizontally, with the rivet member 600 positioned to the left of the rivet gun 13. In this case, the rivet gun 13 is positioned entirely to the left of the elastic member 12 and to the right of the rivet member 600. The left working end of the rivet gun 13 faces the rivet member 600, and the right side of the rivet gun 13 is rotatably connected to the left end of the elastic member 12, while the right end of the elastic member 12 is connected to the mounting base 11. The working end of the rivet gun 13 can be defined as a rivet gun head 131, which can be located at the end of the rivet gun 13 away from the mounting base 11.

[0070] Furthermore, the direction from the mounting base 11 toward the rivet 600 can be defined as the X-axis direction, i.e., the X-axis direction is the left-right direction. A Y-axis direction and a Z-axis direction can also be defined, with any two of the X-axis, Y-axis, and Z-axis being perpendicular to each other. Specifically, the Y-axis direction can be the up-down direction, and the Z-axis direction can be the in-out direction.

[0071] Since the right end of the rivet gun 13 is connected to the left end of the elastic member 12, and the left end of the elastic member 12 can move in the Z-axis direction relative to the right end of the elastic member 12, the rivet gun 13 can move along the Z-axis direction. At this time, this motion state of the rivet gun 13 can be defined as floating in the Z-axis direction.

[0072] It should be noted that the connection between the mounting base 11 and the elastic member 12 can be a fixed connection or an abutment connection. The connection between the rivet gun 13 and the elastic member 12 can also be a fixed connection or an abutment connection, and this is not limited here. In other words, the connection relationship in this application can be not only a direct connection but also an indirect connection, which will not be detailed here.

[0073] When the rivet gun 13 is working, the rivet gun 13 can rivet the two parts to be connected together through the rivet 600. For example, the rivet gun 13 can be a hot rivet gun, and the two parts to be connected can be the battery module 500 and the bus 700 respectively. The first end of the rivet 600 can be connected to the battery module 500, and the second end of the rivet 600 can pass through the bus 700. The hot rivet gun can instantly heat the second end of the rivet 600 to a preset temperature, thereby quickly melting the rivet 600 to fix the bus 700 on the battery module 500.

[0074] When the riveting assembly 10 of this embodiment is in operation, the mounting base 11, together with the elastic member 12 and the rivet gun 13, can first be moved toward the riveted member 600. Then, the working end of the rivet gun 13 can abut the riveted member 600 and heat the riveted member 600. In the case where the riveted member 600 and the working end of the rivet gun 13 are offset, for example, in the Z-axis direction, the elastic member 12 can be used to allow the rivet gun 13 to float in the Z-axis direction, so that the working end of the rivet gun 13 can move to abut the riveted member 600, completing the riveting.

[0075] That is to say, through the cooperation between the rivet gun 13 and the elastic member 12, even if the rivet part 600 is staggered with the rivet gun head 131, the rivet gun head 131 can be automatically positioned by floating, so that the rivet gun 13 can be accurately docked with the rivet part 600, thereby improving the reliability of riveting, and there is no need to adjust the position of the rivet gun 13 manually, thereby improving production efficiency.

[0076] Thus, according to the riveting assembly 10 of this embodiment, by connecting the rivet gun 13 to the elastic member 12 and utilizing the second end of the elastic member to be movable relative to the first end of the elastic member, the rivet gun can be moved between the first position and the second position. Therefore, during the process of the rivet gun 13 abutting the rivet member 600, the rivet gun 13 can be precisely docked with the rivet member 600, thereby improving the reliability of the riveting. The rivet assembly 10 of the present application can achieve precise and rapid docking of the rivet gun 13 with the rivet member 600 by providing the elastic member 12, and has the advantages of simple structure, easy operation, and conducive to improving riveting efficiency.

[0077] Alternatively, the rivet gun head 131 may have a shape that matches the end surface of the rivet member 600. For example, the rivet member 600 may be a cylindrical rivet stud, and the second end of the rivet stud may have an arc-shaped end surface that protrudes outward from the rivet stud. In this case, the end of the rivet gun head 131 that abuts the rivet stud may have a spherical surface that is recessed into the rivet gun head 131. The spherical surface of the rivet gun head 131 and the arc-shaped end surface of the rivet stud may cooperate with each other to position the rivet gun 13. In other words, by adopting the arc-shaped matching structure, the docking efficiency of the rivet gun head 131 and the rivet stud can be further improved, thereby further improving the riveting efficiency.

[0078] According to one embodiment of the present application, a connecting shaft 14 is provided on one side of the rivet gun 13 close to the mounting seat 11 , and an end of the connecting shaft 14 abuts against the second end of the elastic member 12 .

[0079] Specifically, the rivet gun 13 can be connected to the elastic member 12 through the connecting shaft 14. Specifically, the first end of the connecting shaft 14 can be connected to the rivet gun 13, and the second end of the connecting shaft 14 can serve as the end of the connecting shaft 14, that is, the second end of the connecting shaft 14 can be connected to the second end of the elastic member 12. It can be seen that the connecting shaft 14 can play a connecting role.

[0080] Furthermore, the end of the connecting shaft 14 abuts against the second end of the elastic member 12, thereby allowing the connecting shaft 14 to move relative to the elastic member 12, allowing the rivet gun 13 to float, thereby facilitating precise docking of the rivet gun 13 and the riveted member 600. It should be noted that the provision of the connecting shaft 14 avoids the need to connect the rivet gun 13 to the elastic member 12, thereby simplifying the structure of the rivet gun 13.

[0081] In this embodiment, the connection shaft 14 is used to facilitate not only the connection between the rivet gun 13 and the elastic member 12 , but also the floating of the rivet gun 13 .

[0082] Optionally, the rivet gun 13 may be detachably connected to the connecting shaft 14 to facilitate maintenance or replacement of the rivet gun 13 and the connecting shaft 14 respectively.

[0083] According to one embodiment of the present application, the mounting base 11 includes a first connecting base and a second connecting base, wherein a second connecting base 112 is fixedly provided on the surface of the first connecting base 111 facing the rivet gun 13, a first channel 1121 is provided on the side of the second connecting base 112 close to the rivet gun 13, and a second channel 1122 is provided on the side of the second connecting base 112 close to the first connecting base 111, the second channel 1122 is communicated with the first channel 1121, the elastic member 12 is located in the second channel 1122, and a portion of the connecting shaft 14 passes through the first channel 1121 and abuts against the elastic member 12.

[0084] That is to say, the mounting base 11 is mainly composed of a first connecting base 111 and a second connecting base 112 , wherein the first connecting base 111 can be fixedly connected to the second connecting base 112 , and the second connecting base 112 is located on the surface of the first connecting base 111 facing the rivet gun 13 .

[0085] For example, the rivet gun 13 can be located on the left side of the mounting base 11, the first connecting base 111 can be located on the right side of the rivet gun 13, the second connecting base 112 can be located between the rivet gun 13 and the first connecting base 111, and the second connecting base 112 can be fixedly connected to the first connecting base 111.

[0086] The first connection seat 111 may be provided with a first channel 1121 on the left side, and the second connection seat 112 may be provided with a second channel 1122 on the left side. For example, Figure 10The first channel 1121 and the second channel 1122 can extend along the X-axis direction respectively, and the second channel 1122 is connected to the first channel 1121. The elastic member 12 can be disposed in the second channel 1122, and the right end of the connecting shaft 14 can pass through the first channel 1121 and abut against the left end of the elastic member 12.

[0087] In this embodiment, by making the mounting seat 11 include two parts, the first connecting seat 111 and the second connecting seat 112, it is beneficial to form a first channel 1121 and a second channel 1122 to accommodate the elastic member 12 and a part of the connecting shaft 14, which can prevent dust and other foreign matter from entering the part where the connecting shaft 14 and the elastic member 12 abut each other and affecting the movement of the connecting shaft 14.

[0088] According to one embodiment of the present application, the mounting seat 11 also includes a third connecting seat 113, which is located in the second channel 1122. The third connecting seat 113 is provided with a third channel 1131 connected to the first channel 1121. The elastic member 12 is located in the third channel 1131, and a portion of the connecting shaft 14 extends into the first channel 1121 and abuts against the elastic member 12 located in the third channel 1131.

[0089] Specifically, a second channel 1122 may be formed between the first connection seat 111 and the second connection seat 112 to accommodate the third connection seat 113. Specifically, the third connection seat 113 may be located on the left side of the first connection seat 111, and the right side of the second connection seat 112 may be connected to the left side of the first connection seat 111. The second channel 1122 may be closed from the right side of the second connection seat 112 via the first connection seat 111.

[0090] In addition, the third connecting base 113 may have a third channel 1131, which may also extend along the X-axis direction and communicate with the first channel 1121. The third channel 1131 may accommodate the elastic member 12, and the portion of the connecting shaft 14 extending into the first channel 1121 may abut against the elastic member 12.

[0091] Optionally, the first connecting seat 111, the second connecting seat 112 and the third connecting seat 113 are detachably connected to each other, which facilitates the installation and disassembly of the connecting shaft 14, the elastic member 12 and the first ball 15, and is beneficial to the disassembly and maintenance of the riveted assembly 10.

[0092] In this embodiment, by providing the third mounting seat 113 , the elastic member 12 can be limited to define the extension and contraction direction of the elastic member 12 , thereby facilitating control of the movement direction of the connecting shaft 14 and the rivet gun 13 .

[0093] According to one embodiment of the present application, the end of the connecting shaft 14 facing the third connecting seat 13 has a receiving groove 141, and the riveting assembly 10 also includes a first ball 15, at least a portion of the first ball 15 is movably arranged in the receiving groove 141, and the first ball 15 abuts against the second end of the elastic member 12.

[0094] Specifically, the second end of the connecting shaft 14 may be provided with a receiving groove 141, and the receiving groove 141 may be formed by the end surface of the second end of the connecting shaft 14 being recessed toward the interior of the connecting shaft 14. A first ball 15 is provided between the end of the connecting shaft 14 and the second end of the elastic member 12, and the first ball 15 and the second end of the elastic member 12 can abut against each other.

[0095] In addition, at least a portion of the first ball 15 can be located in the receiving groove 141 , and the first ball 15 can rotate in the receiving groove 141 . The receiving groove 141 can accommodate the first ball 13 .

[0096] For example, when the elastic member 12 is a spring, a portion of the outer surface of the first ball 15 can abut against the end of the spring, and another portion of the first ball 15 can be located in the accommodating groove 141 and can abut against the groove wall of the accommodating groove 141 under the action of the elastic force of the spring.

[0097] When the rivet gun head 131 abuts the rivet member 600, the elastic member 12 is compressed, exerting a force on the first ball 15 toward the end of the connecting shaft 14. This forces the first ball 15 into contact with the end of the connecting shaft 14, and also with the second end of the elastic member 12. If the rivet gun head 131 is misaligned with the rivet member 600, the rivet gun 13 can float along the Z-axis, allowing the receiving groove 141 to move relative to the first ball 15.

[0098] In this embodiment, by providing a receiving groove 141 at the end of the connecting shaft 14 to accommodate at least a portion of the first ball 15, the first ball 15 can be restrained within the receiving groove 141, thereby limiting the movable space of the first ball 15. This helps to improve the smoothness of the movement of the connecting shaft 14 relative to the elastic member 12 and reduce the rotational friction between the elastic member 12 and the connecting shaft 14. In addition, the structure of the receiving groove 141 and the first ball 15 has the advantages of being simple in structure and easy to install and manufacture.

[0099] According to one embodiment of the present application, the accommodating groove 141 is a tapered groove with a gradually increasing cross-sectional area along the direction from the rivet gun 13 to the mounting seat 11 .

[0100] Specifically, the opening of the accommodating groove 141 is disposed opposite the second end of the elastic member 12, and the cross-sectional area of ​​the accommodating groove 141 gradually increases from the bottom of the accommodating groove 141 toward the opening of the accommodating groove 141. For example, the cross-sectional area of ​​the accommodating groove 141 increases from left to right, thereby facilitating the rotational connection between the connecting shaft 14 and the first ball 15, improving the smoothness of the rotation of the connecting shaft 14, and increasing the contact area between the first ball 15 and the elastic member 12, thereby reducing the difficulty of connecting the first ball 15 and the elastic member 12. Optionally, the accommodating groove 141 may also be an arc-shaped groove.

[0101] According to one embodiment of the present application, the connecting shaft 14 includes a first section 142 and a second section 143 connected to each other, the second section 143 is located on a side of the first section 142 close to the third connecting seat 113, the radial dimension of the second section 143 is greater than the radial dimension of the first section 142, the first channel 1121 includes a first hole section and a second hole section corresponding to the shapes of the first section 142 and the second section 143, respectively, the first section 142 is located in the first hole section, the second section 143 is located in the second hole section, and the inner surface of the first hole section is spaced apart from the outer surface of the first section 142.

[0102] That is, the connecting shaft 14 is mainly composed of a first segment 142 and a second segment 143 , wherein the first segment 142 is connected to the second segment 143 .

[0103] The connecting shaft 14 will be described in detail below with reference to specific embodiments.

[0104] The first segment 142 and the second segment 143 can each extend along the X-axis. The right end of the first segment 142 can be connected to the left end of the second segment 143. The left end of the first segment 142 can be connected to the rivet gun 13, and the right end of the second segment 143 can abut against the first ball bearing. The projection area of ​​the second segment 143 on the YZ plane can be larger than the projection area of ​​the first segment 142 on the YZ plane.

[0105] A portion of the first segment 142 and the second segment 143 may be located within the first channel 1121. The first channel 1121 may include a first hole segment and a second hole segment, wherein the shape of the first hole segment may correspond to the shape of the first segment 142, and the shape of the second hole segment may correspond to the shape of the second segment 143. At least a portion of the first segment 142 may be located within the first hole segment, and the second segment 143 may be located in the second hole segment.

[0106] In addition, the inner surface of the first hole segment can be separated from the outer surface of the first segment body 142, that is, there can be a gap between the inner surface of the first hole segment and the outer surface of the first segment body 142 to avoid contact between the first hole segment and the first segment body 142, thereby reducing the contact area between the connecting shaft 14 and the inner wall surface of the first channel 1121, and reducing the friction between the connecting shaft 14 and the inner wall surface of the first channel 1121.

[0107] Optionally, the size of the second segment 143 in the first direction can be smaller than the size of the second hole segment in the first direction, so that the internal space of the second hole segment can provide sufficient movement space for the second segment 143, so that the connecting shaft 14 can move along the first direction, thereby realizing the floating of the rivet gun in the first direction.

[0108] According to one embodiment of the present application, the riveting assembly 10 further includes a second rolling ball 16 , and the second segment 143 is supported in the second hole segment by a plurality of second rolling balls 16 .

[0109] Specifically, the second ball 16 can be arranged between the outer surface of the second section 143 and the inner wall surface of the second hole section. Since the inner surface of the first hole section can be separated from the outer surface of the first section 142, by setting the second ball 16, the friction between the connecting shaft 14 and the inner wall surface of the first channel 1121 can be in the form of rolling friction, thereby reducing the friction force between the connecting shaft 14 and the inner wall surface of the first channel 1121.

[0110] Optionally, a ball groove may be provided on the circumference of the second segment 143, and the second ball 16 may be disposed in the ball groove. The ball groove may define the position of the second ball 16 in the X-axis direction. Optionally, the number of second balls 16 may be multiple, and the number of ball grooves may be one or more, which are not limited herein.

[0111] According to one embodiment of the present application, the riveting assembly 10 also includes a third ball 17 and a fourth ball 18, wherein the third ball 17 is located between the first side surface of the second segment 143 and the third connecting seat 113, the fourth ball 18 is located between the second side surface of the second segment and the second connecting seat 112, and the second segment 143 is sandwiched between the third ball 17 and the fourth ball 18.

[0112] The position and connection relationship of the third ball 17 and the fourth ball 18 will be described in detail below with reference to specific embodiments.

[0113] The third ball 17 can be arranged between the right side of the second section 143 and the left side of the third connecting seat 113, and the fourth ball 18 can be arranged between the left side of the second section 143 and the step surface between the first hole section and the second hole section. That is, a step surface is formed at the connection between the first hole section and the second hole section, and the step surface is opposite to the left side of the second section 143. The fourth ball 18 can be arranged between the left side of the second section 143 and the step surface.

[0114] In other words, the third ball 17 is disposed on the right side of the second segment 143 , the fourth ball 18 is disposed on the left side of the second segment 143 , and the second segment 143 is located between the third ball 17 and the fourth ball 18 .

[0115] In this embodiment, by arranging the third ball 17 and the fourth ball 18, rolling friction can be formed between the first side surface and the second side surface of the second section 143 and the corresponding structure of the mounting seat 11. Combined with the arrangement of the second ball 16, the friction between all outer surfaces of the second section and the corresponding structure of the mounting seat 11 can be rolling friction, which is beneficial to reducing the friction force during the movement of the connecting shaft 14.

[0116] The present application further provides a riveting device 100, which includes a fixing base 40 and a riveting assembly 10. The riveting assembly 10 is the riveting assembly 10 described in any embodiment, and the mounting base 11 is disposed on the fixing base 40. When the rivet gun 13 moves from a first position to a second position along a first direction, the rivet gun 13 can correspond to the position of the riveted member 600.

[0117] Specifically, the riveting device 100 according to this embodiment mainly comprises a fixing base 40 and a riveting assembly 10 , wherein the riveting assembly 10 can be connected to the fixing base 40 , and specifically, the mounting base 11 in the riveting assembly 10 can be disposed on the fixing base 40 .

[0118] Among them, there may be an alignment position between the first position and the second position, and the alignment position corresponds to the position of the rivet 600. When the rivet gun 13 moves from the first position to the second position along the first direction, the rivet gun 13 can pass through the alignment position, and when in the alignment position, the rivet gun head 131 of the rivet gun 13 can be aligned with the rivet 600, and the arc-shaped groove 1311 on the rivet gun head 131 cooperates with the rivet 600 to limit the rivet gun 13, so that the rivet gun 13 stops moving.

[0119] It should be noted that the riveting device 100 can be used in the production of a battery module 500. The battery module 500 can include multiple battery cells 501. A busbar 700 can be installed on the side of the battery module 500. By installing the busbar 700, the multiple battery cells 501 can be connected in series or in parallel. The busbar 700 and the battery module 500 can be connected by riveting using a rivet 600. The rivet 600 can be riveted by a rivet gun 13 to fix the busbar 700 to the side of the battery module 500. Specifically, the side of the battery module 500 can be provided with a rivet 600, which can be a rivet stud. One end of the rivet stud can be connected to the side of the battery module 500, and the other end of the rivet stud can pass through the busbar 700.

[0120] In the battery module 500, foam may be provided between two adjacent battery cells 501, which may cause the spacing between the two adjacent battery cells 501 to vary. The spacing between any two adjacent battery cells 501 may not be equal to the spacing between any other two adjacent battery cells 501, which may cause the distance between adjacent rivets 600 to be unequal. For the above-described battery module 500, the rivet assembly of the present application can still quickly and reliably rivet the rivets 600, thereby reliably and stably mounting the busbar 700 on the side of the battery module 500.

[0121] Therefore, the riveting device 100 of the present application can be used in the field of battery manufacturing, for example, for assembling a busbar 700 and a battery module 500. In addition, since the riveting device 100 includes the riveting assembly 10 of any of the above-mentioned embodiments, the riveting assembly 10 has advantages such as high riveting efficiency and good riveting reliability. Therefore, the riveting device 100 of this embodiment also has the above-mentioned advantages, which will not be described in detail here.

[0122] Optionally, the number of the riveting assemblies 10 and the number of the riveting members 600 can be multiple and correspond one to one, and the arrangement direction of the multiple riveting assemblies 10 can be consistent with the arrangement direction of the multiple busbars 700.

[0123] The following describes in detail the arrangement of the riveting assemblies by taking the case where there are multiple riveting assemblies 10 as an example.

[0124] The busbars 700 may be arranged along the Z-axis direction, a plurality of rivet assemblies 10 may be connected to one fixing seat 40 , and the plurality of rivet assemblies 10 may be arranged on the fixing seat 40 at intervals along the Z-axis direction.

[0125] Among them, the number of rivet assemblies 10 can be the same as the sum of the rivet parts 600 on a single side of the battery module 500. For example, two rows of rivet parts 600 can be provided on the side of the battery module 500, and each row of rivet parts 600 can be arranged spaced apart along the Z-axis direction. Correspondingly, two rows of rivet assemblies 10 can be provided on the fixing seat 40, and each row of rivet assemblies 10 can be arranged spaced apart along the Z-axis direction, and multiple rivet assemblies 10 correspond one-to-one to the multiple rivet parts 600 on the side.

[0126] By setting the number of riveting assemblies 10 to be multiple and corresponding to the number of riveted parts 600, multiple riveted parts 600 can be riveted at the same time. Compared with the prior art that can only rivet one riveted part 600 at a time, while ensuring the riveting quality, the production efficiency is also improved.

[0127] Optionally, the number of riveted assemblies 10 may be less than the number of riveted parts 600, or may be more than the number of riveted parts 600. When the number of riveted assemblies 10 is less than the number of riveted parts 600, the riveting process of the riveted parts 600 on the side of the battery module 500 may be divided into multiple times; when the number of riveted assemblies 10 is more than the number of riveted parts 600, the riveted assemblies 10 corresponding to the riveted parts 600 to be riveted can be moved toward the direction close to the bus 700 to complete the riveting, and the remaining riveted assemblies 10 can stay in the initial position to avoid interference with the battery module 500.

[0128] Optionally, the fixing base 40 may be provided with a driving cylinder 80 that is connected to the mounting base 11 to push the mounting base 11 relative to the fixing base 40. When the number of riveting assemblies 10 and the number of riveting parts 600 do not correspond one-to-one, the driving cylinder 80 can be used to drive the riveting assembly 10 corresponding to the riveting part 600 to move closer to the riveting part 600 to complete the riveting. During the riveting process, the remaining riveting assemblies 10 not corresponding to the riveting part 600 can be positioned away from the riveting part 600 and wait.

[0129] According to one embodiment of the present application, a pressing block 30 is installed on the fixing seat 40 , and the pressing block 30 is movable to position the riveted piece 600 before the riveting gun 13 rivets the riveted piece 600 .

[0130] Specifically, the pressing block 30 can be connected to the fixing base 40, and the pressing block 30 and the rivet gun 13 can be located on the same side of the battery module 500. The pressing block 30 is movable in the second direction, for example, in the X-axis direction. The pressing block 30 can be used to position the rivet member 600 before the rivet gun 13 rivets the rivet member 600, thereby preventing relative displacement between the battery module 500 and the busbar 700. This facilitates precise docking of the rivet gun 13 with the rivet member 600 and improves the reliability of the riveting.

[0131] Optionally, the pressing block 30 has a plurality of protruding teeth on the side facing the bus 700, and the plurality of protruding teeth can be arranged along the arrangement direction of the bus 700. For example, the plurality of protruding teeth can be arranged along the Z-axis direction. The protruding teeth can make the bus 700 abut against the side of the battery module 500, so as to improve the positioning stability of the pressing block 30 on the bus 700 and avoid the relative position between the bus 700 and the battery module 500 from being offset during the riveting process.

[0132] Optionally, the connection between the pressing block 30 and the bracket 20 is detachable, that is, the pressing blocks 30 of different shapes can be replaced to position the busbar 700 according to the shape, size and spacing between the busbars 700, thereby improving the applicability of the riveting device 100.

[0133] According to one embodiment of the present application, the riveting device 100 also includes a bracket 20 and a movable plate 60, the movable plate 60 is installed on the bracket 20, the fixed seat 40 is provided on the movable plate 60, the movable plate 60 is movable on the bracket 20, and / or the fixed plate 40 is movable on the movable plate 60.

[0134] Specifically, a movable plate 60 can be provided on the bracket 20. Optionally, the bracket 20 can also be provided with a slide rail 50. The first side of the movable plate 60 can be provided on the slide rail 50 and can move along the extension direction of the slide rail 50. The second side of the movable plate 60 can be movably connected to the fixed seat 40.

[0135] For example, the first side of the movable plate 60 may be the lower side of the movable plate 60, and the second side of the movable plate 60 may be the upper side of the movable plate 60. That is, the lower side of the movable plate 60 may be connected to the slide rail 50, and the movable plate 60 may move along the extension direction of the slide rail 50. The slide rail 50 may extend along the X-axis direction, and the movable plate 60 may reciprocate along the X-axis direction. The upper side of the movable plate 60 may be connected to the fixed base 40. The movement of the movable plate 60 may cause the fixed base 40, the pressure block 30 provided on the fixed base 40, and the riveting assembly 10 to move along the X-axis direction, thereby improving the flexibility of position control of the rivet gun assembly.

[0136] Optionally, the fixed plate 40 may be movably connected to the movable plate 60. For example, the riveting device 100 may further include an adjusting cylinder 70. The adjusting cylinder 70 may be disposed on the upper side of the movable plate 60. The telescopic end of the adjusting cylinder 70 may be connected to the fixing base 40 to drive the fixing base 40 to move along the arrangement direction of the busbars 700, for example, to drive the fixing base 40 to move along the Z-axis. Furthermore, the positions of multiple rivet gun assemblies 10 on the fixing base 40 may be adjusted simultaneously by adjusting the position of the fixing base 40.

[0137] In this embodiment, by providing the bracket 20 and the movable plate 60 , the fixing seat 40 can drive the riveting assembly 10 to move toward and away from the side of the battery module 500 .

[0138] The present application also provides a production device for a battery module 500, comprising a carrier 200, a conveying mechanism, and a riveting device 100. The carrier 200 is used to support the battery module 500, the conveying mechanism is used to move the carrier 200, and the riveting device 100 is any of the riveting devices 100 described in the above embodiments, and is disposed on one or both sides of the carrier.

[0139] In other words, the production equipment of the battery module 500 according to the embodiment of the present application is mainly composed of a carrier 200 , a conveying mechanism and a riveting device 100 , wherein the production equipment of the battery module 500 can be used to produce the battery module 500 .

[0140] Specifically, the battery module 500 can be placed on the carrying surface of the carrying platform. Optionally, the battery module 500 can be placed directly or indirectly on the carrying surface, which is not limited here. The conveying mechanism can transport the carrying platform 200 to facilitate the flow of the battery module 500 between multiple stations. For example, after riveting is completed, the battery module 500 can be quickly transferred to the next processing station.

[0141] In addition, the bracket 20 of the riveting device 100 can be located on one side of the supporting platform. In this case, the bracket 20 can be located on one side of the battery module 500, and the rivet gun head 131 can be arranged opposite to the bus bar 700 to facilitate the rivet gun 13 to rivet the rivet column.

[0142] Optionally, the number of riveting devices 100 may be one or more, which is not limited herein and may be set according to the number and arrangement of rivet columns on the battery module 500 .

[0143] Therefore, since the production equipment of the battery module 500 in this embodiment includes the riveting device 100 in any of the above embodiments, and the riveting device 100 of the present application has the advantages of easy operation, high riveting efficiency, and high riveting stability, the production equipment of the battery module 500 in this embodiment also has the same advantages, such as the high processing efficiency of the battery module 500, which will not be elaborated here.

[0144] Optionally, the number of riveting devices 100 in the production equipment of the battery module 500 may be two, for example, Figure 1As shown, one of the two riveting devices 100 can be arranged on the left side of the battery module 500, and the other of the two riveting devices 100 can be arranged on the right side of the battery module 500. The rivet gun 13 in the riveting device 100 on the left side can be arranged opposite to the bus 700 on the left side of the battery module 500, and the rivet gun 13 in the riveting device 100 on the right side can be arranged opposite to the bus 700 on the right side of the battery module 500, so that the production equipment of the battery module 500 can rivet the rivets 600 on both sides of the battery module 500 at the same time to improve production efficiency.

[0145] It should be noted that the number and positions of the riveting devices 100 can be set according to the installation position of the busbar 700 on the battery module 500, which will not be described in detail here.

[0146] According to one embodiment of the present application, the production equipment of the battery module 500 further includes a support 301, a first driving member 3021, a second driving member 3022, a first pressing plate 3031, and a second pressing plate 3032. The first driving member 3021, the second driving member 3022, the first pressing plate 3031, and the second pressing plate 3032 can form a second positioning assembly 300.

[0147] Specifically, the first driving member 3021 and the second driving member 3022 are respectively disposed on the support 301. The first pressure plate 3031 is connected to the power output end of the first driving member 3021. The first pressure plate 3031 can move toward and away from the top surface of the battery module 500, so that the battery module 500 is sandwiched between the first pressure plate 3031 and the support platform. Two second pressure plates 3032 are respectively disposed on two opposite sides of the battery module 500, each second pressure plate 3032 being disposed at the power output end of the corresponding second driving member 3022. Each second pressure plate 3032 can move toward and away from the corresponding side surface to limit the freedom of the battery module 500 in the second direction.

[0148] The support 301 can be disposed on top of the battery module 500, and the first driving member 3021 and the second driving member 3022 can be respectively connected to the support 301. The power output end of the first driving member 3021 can be connected to the first pressing plate 3031 to drive the pressing plate 3031 to move along the Y-axis, and the power output end of the second driving member 3022 can be connected to the second pressing plate 3032 to drive the second pressing plate 3032 to move along the X-axis.

[0149] Among them, the first pressure plate 3031 can be located at the top of the battery module 500. Under the drive of the first driving member 3021, the first pressure plate 3031 can move in the direction close to or away from the top surface of the battery module 500. When the first pressure plate 3031 moves toward the direction close to the battery module 500, the first pressure plate 3031 can cooperate with the supporting platform to clamp the battery module 500 to limit the freedom of the battery module 500 in the Y-axis direction.

[0150] In addition, there may be two second pressing plates 3032, wherein the side surface of one second pressing plate 3032 may be opposite to the side surface of the other second pressing plate 3032. The two second pressing plates 3032 may be movable in directions closer to or farther from the side surface of the battery module 500. For example, one of the two second pressing plates 3032 may be positioned opposite to the left side surface of the battery module 500, and the other of the two second pressing plates 3031 may be positioned opposite to the right side surface of the battery module 500. When both second pressing plates 3031 move toward the battery module 500, they may clamp the battery module 500, thereby limiting the degree of freedom of the battery module 500 in the X-axis direction.

[0151] In this embodiment, by setting a first driving member 3021 to drive the first pressure plate 3031 to cooperate with the supporting platform, and a second driving member 3022 to drive the second pressure plate 3032, the freedom of the battery module in two directions can be limited to avoid the relative position of the various battery cells 501 in the battery module 500 during the riveting process, thereby affecting the riveting accuracy.

[0152] Optionally, the production equipment for the battery module 500 further includes an image acquisition terminal 400 and an installation component. Specifically, the image acquisition terminal 400 can be used to obtain position information of the rivet 600. The installation component receives the position information of the rivet 600 and installs the busbar 700 on the rivet 600 based on the position information of the rivet 600. In this embodiment, by pre-acquiring the position information of the rivet 600, the assembly efficiency of the busbar 700 and the rivet 600 is improved.

[0153] Optionally, the production equipment for the battery module 500 may further include a controller, which may be electrically connected to the image acquisition terminal 400 and the mounting member. The image acquisition terminal 400 may obtain the position coordinates of each rivet 600, and then transmit the obtained position information to the controller of the production equipment for the battery module 500. The controller then controls the mounting member to install the busbar 700 at the corresponding position on the battery module 500 based on the position information of the rivet 600.

[0154] Optionally, the mounting member may include a robot that can grab the bus 700 and, based on the position information of the rivet 600 , install the bus 700 onto the rivet 600 in sequence, so that the rivet 600 extends out of the bus 700 , so as to facilitate subsequent riveting of the rivet 600 using the rivet gun 13 .

[0155] By providing the image acquisition terminal 400 and the mounting parts in cooperation with the riveting device 100 , the busbar 700 and the battery module 500 before riveting can be automatically assembled, thereby saving labor costs and improving production efficiency.

[0156] Optionally, the image acquisition terminal 400 may be movably connected to the bracket 20 in the riveting device 100 . For example, the image acquisition terminal 400 may be movable along the arrangement direction of the rivet studs.

[0157] Optionally, the image acquisition terminal 400 may include a camera, which can quickly acquire the position information of the rivet 600 . Using a camera has the advantage of reducing production costs.

[0158] Optionally, the camera may move along the arrangement direction of the rivet studs to scan the battery module 500 and obtain position information of the rivet studs.

[0159] In summary, the riveting assembly 10 provided in the embodiment of the present application, including the riveting device 100 of the riveting assembly 10, and the production equipment of the battery module 500 including the riveting device 100, can achieve precise docking between the rivet gun 13 and the riveted part 600, which can not only improve the reliability of riveting, but also improve the riveting efficiency.

[0160] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A riveting assembly, characterized in that: include: Mounting seat; a rivet gun movable relative to the mounting base along a first direction from a first position to a second position; an elastic member, the elastic member being retractable along a second direction intersecting the first direction, the first end of the elastic member along the second direction being connected to the mounting seat, the second end of the elastic member along the second direction being connected to the rivet gun, the second end of the elastic member being movable relative to the first end of the elastic member along the first direction so as to move the rivet gun between the first position and the second position; A connecting shaft is provided on one side of the rivet gun close to the mounting seat, and an end of the connecting shaft abuts against the second end of the elastic member; Wherein, the mounting base comprises: a first connecting seat; a second connecting seat, wherein the second connecting seat is fixedly provided on a surface of the first connecting seat facing the rivet gun, a first channel is provided on a side of the second connecting seat close to the rivet gun, and a second channel is provided on a side of the second connecting seat close to the first connecting seat; a third connecting seat, the third connecting seat being located in the second channel; The end of the connecting shaft facing the third connecting seat has an accommodating groove, and the riveting assembly further includes: A first rolling ball, at least a portion of which is movably disposed in the accommodating groove, and the first rolling ball abuts against the second end of the elastic member.

2. The riveting assembly according to claim 1, characterized in that: The second channel is communicated with the first channel, the elastic member is located in the second channel, and a portion of the connecting shaft passes through the first channel and abuts against the elastic member.

3. The riveting assembly according to claim 2, characterized in that: The third connecting seat is provided with a third channel communicating with the first channel, the elastic member is located in the third channel, and a portion of the connecting shaft extends into the first channel and abuts against the elastic member located in the third channel.

4. The riveting assembly according to claim 1, characterized in that: Along the direction from the rivet gun to the mounting seat, the accommodating groove is a tapered groove with a gradually increasing cross-sectional area.

5. The riveting assembly according to claim 3, characterized in that: The connecting shaft includes a first segment and a second segment connected to each other, the second segment is located on a side of the first segment close to the third connecting seat, the radial dimension of the second segment is larger than the radial dimension of the first segment, the first channel includes a first hole segment and a second hole segment corresponding to the shapes of the first segment and the second segment respectively, the first segment is located in the first hole segment, the second segment is located in the second hole segment, and the inner surface of the first hole segment is spaced apart from the outer surface of the first segment.

6. The riveting assembly according to claim 5, characterized in that: Also includes: Second rolling balls, the second section body is supported in the second hole section by a plurality of second rolling balls.

7. The riveting assembly according to claim 5, characterized in that: Also includes: a third rolling ball, the third rolling ball being located between the first side surface of the second section and the third connecting seat; a fourth rolling ball, the fourth rolling ball being located between the second side surface of the second section and the second connecting seat; Wherein, the second section is sandwiched between the third rolling ball and the fourth rolling ball.

8. A riveting device, characterized in that: include: Fixed seat; The riveting assembly is a riveting assembly according to any one of claims 1 to 7, the mounting seat is arranged on the fixing seat, and when the rivet gun moves from the first position to the second position along the first direction, the rivet gun can correspond to the position of the riveted part.

9. The riveting device according to claim 8, characterized in that: A pressing block is mounted on the fixing seat and is movable so as to position the riveted piece before the riveting gun rivets the riveted piece.

10. The riveting device according to claim 8, characterized in that: Also includes: Bracket; A movable plate is mounted on the bracket, the fixing seat is provided on the movable plate, the movable plate is movable on the bracket, and / or the fixing seat is movable on the movable plate.

11. A battery module production device, characterized in that: include: A carrying platform, the carrying platform is used to support the battery module; A conveying mechanism, the conveying mechanism is used to drive the carrying platform to move; The riveting device is the riveting device described in any one of claims 8 to 10, and the riveting device is arranged on one side or both sides of the supporting platform.

12. The battery module production equipment according to claim 11, characterized in that: Also includes: Support; a first driving member and a second driving member, wherein the first driving member and the second driving member are respectively provided on the support; a first pressing plate connected to a power output end of the first driving member, the first pressing plate being movable toward and away from a top surface of the battery module so that the battery module is sandwiched between the first pressing plate and the supporting platform; Two second pressure plates are respectively arranged on two opposite sides of the battery module, each second pressure plate is arranged at the power output end of the corresponding second driving member, and each second pressure plate can move toward and away from the corresponding side to limit the freedom of the battery module in the second direction.

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