Battery pole riveting jig

Abstract

The utility model discloses a riveting jig for a battery pole. The riveting jig comprises a pressing rivet body and a rotating body, a penetrating channel extending in the first direction is formed in the pressing rivet body in a penetrating mode, the pressing rivet body is provided with a first end face and a second end face which are oppositely arranged in the first direction, and the first end face of the pressing rivet body is provided with a pressing rivet part arranged around the center line of the penetrating channel; the rotating body is rotatably arranged in the penetrating channel in a penetrating mode, and the rotating body is provided with a thread structure which is exposed outwards from the first end face of the pressing rivet body. According to the battery pole riveting jig disclosed by the utility model, the battery pole is riveted by adopting a reverse riveting mode, so that the pressure on a battery cell during riveting is effectively reduced, and the influence on the performance of the battery is avoided; in addition, when the battery leaks liquid and is poor in sealing performance, the battery can be subjected to riveting repair again.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing, and in particular to a battery terminal riveting fixture. Background Technology

[0002] Electric vehicles, due to their advantages such as energy saving and low pollution, have become the main direction of contemporary automotive development and a new growth point for the automotive industry. All of this requires the emergence of power batteries. A power battery is a power source that provides power to tools, primarily referring to the batteries that power electric vehicles, electric trains, electric bicycles, and golf carts.

[0003] Based on their shape, power batteries typically include cylindrical batteries and prismatic batteries. Cylindrical batteries, due to their shape, are easier to dissipate heat when assembled into packs, resulting in longer battery life. Therefore, cylindrical batteries are more commonly used in modules with high heat dissipation requirements.

[0004] Cylindrical power batteries typically consist of a cell, a casing housing the cell, and a cover plate, with the casing and one of the cell's terminals (usually the negative terminal) electrically connected. The cover plate includes a top cover plate, terminals, insulators, seals, a current collector plate, and a terminal plate. Insulators are used to insulate the current collector plate from the top cover plate, the top cover plate from the terminals, and the top cover plate from the terminal plate. Through-holes are formed in the top cover plate, through which the terminals pass and are sealed by seals. The upper end of the terminal is riveted to the terminal plate after passing through it. The upper part of the current collector plate is welded to the lower part of the terminals, and the lower part of the current collector plate is welded to the other terminal (positive terminal) tab of the cell.

[0005] However, the current method involves using stamping equipment to press and rivet the upper end of the electrode post. Therefore, the pressing and riveting process at the upper end of the electrode post will generate a large downward pressure on the battery cell, which will affect the battery performance.

[0006] Therefore, there is an urgent need for a battery terminal riveting fixture to overcome one or more of the above-mentioned defects. Utility Model Content

[0007] The purpose of this invention is to provide a battery terminal riveting fixture that uses a reverse riveting method to rivet battery terminals, effectively reducing the pressure on the battery cell during riveting and avoiding any impact on battery performance.

[0008] To achieve the above objectives, the battery terminal riveting fixture of this utility model includes a riveting body and a rotating body. The riveting body has a through-hole extending along a first direction, and has a first end face and a second end face arranged opposite to each other in the first direction. The first end face of the riveting body has a riveting portion arranged around the center line of the through-hole. The rotating body is rotatably inserted into the through-hole, and has a threaded structure exposed outward from the first end face of the riveting body.

[0009] Compared to existing technologies, this invention utilizes a design where "the first end face of the riveting body has a riveting portion arranged around the centerline of the through-channel, and the rotating body is rotatably inserted into the through-channel, with a threaded structure exposed outward from the first end face of the riveting body." During the riveting process of the battery terminals, the rotating body, while rotating, screws into the battery terminals through the threaded structure, thereby applying tension to the battery terminals. Simultaneously, the riveting portion applies a riveting force to the end of the battery terminals, with the riveting force and tension force acting in opposite directions. Therefore, this invention's battery terminal riveting fixture employs a reverse riveting method to rivet the battery terminals, effectively reducing the pressure on the battery cell during riveting and avoiding any impact on battery performance. Furthermore, if the battery has leakage or poor sealing, it can be repaired by riveting again.

[0010] Preferably, the threaded structure extends beyond the riveting part; the threaded structure is an external threaded structure; the riveting part is a convex ring structure protruding from the first end face of the riveting body.

[0011] Preferably, the convex ring structure is a cone with its apex far from the first end face of the riveting body; the outer surface of the convex ring structure is a concave annular curved surface; the first end face of the riveting body and the end face of the convex ring structure opposite to the first end face are each perpendicular to the center line of the through channel.

[0012] Preferably, the battery terminal riveting fixture of this utility model further includes a rotary motor for driving the rotating body to rotate relative to the pressing body, the rotary motor being arranged facing the second end face of the pressing body, and the output end of the rotary motor being assembled and connected to the rotating body.

[0013] Preferably, the battery terminal riveting fixture of this utility model further includes a fixture frame, a sliding body slidably disposed on the fixture frame along the first direction, and a reciprocating driver for driving the sliding body to reciprocate. The reciprocating driver is mounted on the fixture frame, and the riveting body is connected to the sliding body to follow the sliding body.

[0014] Preferably, the fixture frame includes a gantry frame, the gantry frame includes two legs and a crossbeam connected to the two legs, the crossbeam is provided with a guide rail located inside the gantry frame and extending along the first direction, the sliding body is slidably mounted on the guide rail; the reciprocating drive is mounted on the crossbeam, and the output end of the reciprocating drive faces the sliding body.

[0015] Preferably, the reciprocating drive is a rotary motor, the output end of which is connected to a transmission screw extending along the first direction, and the sliding body is provided with a transmission nut that slides on the transmission screw; the rotary motor drives the sliding body to reciprocate through the cooperation of the transmission screw and the transmission nut.

[0016] Preferably, the fixture frame further includes a base connected to the two legs, and the base is provided with a clamping structure for clamping the battery arranged opposite to the press-fit body in the first direction.

[0017] Preferably, the battery terminal riveting fixture of this utility model further includes a rotary motor for driving the rotating body to rotate relative to the pressing body. The rotary motor is arranged facing the second end face of the pressing body. The output end of the rotary motor is assembled and connected to the rotating body. The rotary motor is also assembled at the sliding body.

[0018] Preferably, the second end face of the press-fit body is embedded in the sliding body, and the press-fit body has a threaded hole that penetrates the second end face of the press-fit body. The threaded hole extends along the first direction and communicates with the through-channel. The rotary motor is embedded in the sliding body, and the housing of the rotary motor has a threaded connection structure that is threadedly connected and fixed to the threaded hole. Attached Figure Description

[0019] Figure 1 This is a plan view of the battery terminal riveting fixture of this utility model.

[0020] Figure 2 It is along Figure 1 Internal view of the section cut along the BB line.

[0021] Figure 3 yes Figure 2 Enlarged view of section C.

[0022] Figure 4 yes Figure 3 Internal view of the press-fit body.

[0023] Figure 5 This is a perspective view of the assembled pressing body, rotating body, and rotating motor in the battery terminal riveting fixture of this utility model.

[0024] Figure 6 yes Figure 5 Enlarged view of section D.

[0025] Figure 7 yes Figure 5 A three-dimensional exploded view.

[0026] Figure 8 yes Figure 7Enlarged view of section E in the middle.

[0027] Figure 9 Is Figure 2 The diagram shows the battery's state, which also shows that the rotating body is not screwed into the battery's terminals and that the crimping body is not crimped to the ends of the terminals.

[0028] Figure 10 yes Figure 9 Enlarged view of section F in the middle.

[0029] Figure 11 Is Figure 9 The diagram shows the state where the rotating body has been screwed into the battery terminal and the riveting body is in the position of riveting the end of the terminal.

[0030] Figure 12 yes Figure 11 A magnified view of section G in the middle.

[0031] Figure 13 Is Figure 11 The diagram shows the state of the riveted body after it has been riveted to the end of the pole post.

[0032] Figure 14 yes Figure 12 Enlarged view of section H in the middle. Detailed Implementation

[0033] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0034] Please see Figure 1 and Figure 2 The battery terminal riveting fixture 100 of this utility model includes a riveting body 10, a rotating body 20, a rotary motor 30, a fixture frame 40, a sliding body 50, and a reciprocating driver 60, and is combined with... Figure 3 and Figure 4 The riveting body 10 has a through-passage channel 11 extending along a first direction (see double arrow A). Optionally, as an example, the through-passage channel 11 is a circular channel. Obviously, depending on actual needs, the through-passage channel 11 can also be an elliptical channel or a polygonal channel, so it is not limited to this description. The riveting body 10 has a first end face 12 and a second end face 13 arranged opposite to each other in the first direction. The first end face 12 of the riveting body 10 has a riveting portion 14 arranged around the center line C of the through-passage channel 11.

[0035] like Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, as an example, the rotating body 20 is rotatably inserted into the insertion channel 11, and the rotating body 20 is provided with a threaded structure 21 exposed externally by the first end face 12 of the press-fit body 10; alternatively, in Figure 3 , Figure 5 and Figure 6 In this example, the threaded structure 21 extends beyond the riveting part 14, making it easier to screw the threaded structure 21 into the terminal post 220 of the battery 200. Furthermore, the threaded structure 21 is an external thread, which facilitates the matching of the threaded structure 21 with the threaded blind hole 222 inside the terminal post 220. Obviously, depending on actual needs, the threaded structure 21 can also be designed not to extend beyond the riveting part 14, or it can be designed as an internal thread. When the threaded structure 21 is designed as an internal thread, the terminal post 220 has a blind hole and an external threaded protrusion at the center of the blind hole for threaded engagement with the internal thread, thus achieving the purpose of riveting the end 221 of the terminal post 220 of the battery 200 using the battery terminal post riveting fixture 100 of this invention.

[0036] like Figure 2 As shown, as an example, the sliding body 50 is slidably mounted on the jig frame 40 along the first direction, and the jig frame 40 provides support for the sliding of the sliding body 50; the reciprocating drive 60 is mounted on the jig frame 40, and the jig frame 40 provides support for the reciprocating drive 60. The reciprocating drive 60 is used to drive the sliding body 50 to reciprocate. The sliding body 50 is also connected to the pressing body 10 so that the pressing body 10 can slide together with the sliding body 50; alternatively, as an example, the sliding body 50 is fixedly connected to the pressing body 10.

[0037] like Figure 2 , Figure 3 , Figure 5 and Figure 7 As shown in the illustration, as an example, the rotary motor 30 is mounted on the sliding body 50, which provides support for the rotary motor 30 and allows it to slide along with the sliding body 50. Simultaneously, the rotary motor 30 is arranged facing the second end face 13 of the pressing body 10, and the output end 31 of the rotary motor 30 is connected to the rotating body 20 to drive the rotating body 20 to rotate relative to the pressing body 10. More specifically, as follows:

[0038] like Figure 4 , Figure 7 and Figure 8 As an example, the riveting part 14 is a convex ring structure that protrudes from the first end face 12 of the riveting body 10, so that the riveting part 14 applies force to the end 221 of the terminal post 220 of the battery 200 at various positions in the circumferential direction, thus achieving a better riveting effect. Specifically, in conjunction with Figure 4 , Figure 6 and Figure 8 As an example, the convex ring structure is tapered with its apex away from the first end face 12 of the press-fit body 10. This design improves the smoothness of pressing the press-fit part 14 onto the end 221 of the terminal post 220 of the battery 200. More specifically, in conjunction with Figure 4 , Figure 6 and Figure 8 As an example, the outer surface 141 of the convex ring structure is a concave annular curved surface. The first end face 12 of the rivet body 10 and the end face 142 of the convex ring structure opposite to the first end face 12 are both perpendicular to the center line C of the through channel 11, as shown in the figure. Figure 4 As shown.

[0039] like Figure 2 , Figure 3 , Figure 5 and Figure 7 As shown, as an example, the second end face 13 of the press-fit body 10 is embedded in the sliding body 50, so that the first end face 12 of the press-fit body 10 is located outside the sliding body 50; a threaded hole 15 is provided in the press-fit body 10, which extends through the second end face 13 of the press-fit body 10 and communicates with the through passage 11; the rotary motor 30 is embedded in the sliding body 50, and the housing 32 of the rotary motor 30 is provided with a threaded connection structure 321 that is threadedly connected and fixed to the threaded hole 15; this design facilitates the installation and removal of the press-fit body 10, so the press-fit body 10 can be flexibly replaced according to actual needs.

[0040] like Figure 2 As shown, as an example, the jig frame 40 includes a gantry frame 41. The gantry frame 41 includes two legs 411 and a crossbeam 412 connected to the two legs 411. A guide rail 413 located within the gantry frame 41 and extending in a first direction is provided on the crossbeam 412. The sliding body 50 slides on the guide rail 413. This design improves the smoothness and stability of the sliding body 50's movement and also allows the sliding body 50, the riveting body 10, the rotating body 30, and the rotary motor 30 to all be arranged within the gantry frame 41, resulting in a more compact structure. Furthermore, a reciprocating drive 60 is mounted on the crossbeam 412, which provides support for the reciprocating drive 60. The output end 61 of the reciprocating drive 60 faces the sliding body 50. Specifically, in... Figure 2In this example, the reciprocating drive 60 is a rotary motor. The output end 61 of the rotary motor is connected to a transmission screw 70 extending along a first direction. The sliding body 50 is provided with a transmission nut 80 that slides on the transmission screw 70, so that the rotary motor drives the sliding body 50 to reciprocate through the cooperation of the transmission screw 70 and the transmission nut 80, thereby improving the accuracy and reliability of the reciprocating sliding of the sliding body 50. In addition, the fixture frame 40 also includes a base 42 connected to the two legs 411. The base 42 is provided with a transmission screw 70 extending along a first direction. The clamping structure 421, which is arranged facing the riveting body 10, is used to clamp the battery 200 before riveting the end 221 of the terminal post 220 of the battery 200, thereby improving the ease of operation. Obviously, according to actual needs, the base 42 and the clamping structure 421 can also be deleted. In this case, during the riveting process of the battery terminal post riveting fixture 100 of this utility model on the end 221 of the terminal post 220 of the battery 200, the battery 200 can be held by hand.

[0041] Referring to the accompanying drawings, the working process of the battery terminal riveting fixture 100 of this utility model is described as follows: Before riveting, the battery 200 is first installed in the clamping structure 421. The positional relationship between the riveting body 10 and the battery 200 at this time is shown in the figure. Figure 9 and Figure 10 As shown; next, the reciprocating drive 60 drives the sliding body 50, along with the riveting body 10, the rotating body 20, and the rotary motor 30 on the sliding body 50, to slide closer to the battery 200 via the transmission screw 70 and the transmission nut 80. This causes the threaded structure 21 of the rotating body 20 to screw into the terminal post 220 of the battery 200 under the drive of the rotary motor 30, and causes the riveting part 14 of the riveting body 10 to perform a riveting operation on the end 221 of the terminal post 220. (See diagram). Figure 11 and Figure 12 As shown.

[0042] When the reciprocating drive 60 continues to drive the sliding body 50 together with the rivet body 10, the rotating body 20 and the rotary motor 30 on the sliding body 50, Figure 13 At the position shown, the riveting part 14 of the riveting body 10 completes the riveting of the end 221 of the pole post 220, thereby achieving the purpose of fixing the terminal plate 230 by the end 221. Figure 14 As shown.

[0043] Compared with the prior art, by using a design where "the first end face 12 of the riveting body 10 has a riveting part 14 arranged around the center line C of the through-channel 11, the rotating body 20 is rotatably inserted into the through-channel 11, and the rotating body 20 has a threaded structure 21 exposed externally by the first end face 12 of the riveting body 10", during the riveting process of the terminal post 220 of the battery 200, the rotating body 20 is screwed into the terminal post 220 of the battery 200 through the threaded structure 21 during rotation, thereby applying a tensile force to the terminal post 220 of the battery 200; at the same time, the riveting part 14 applies a riveting force to the end 221 of the terminal post 220 of the battery 200, and the riveting force and the tensile force are in opposite directions, for example, in Figure 12 In this design, the pressing force is downward and the pulling force is upward; therefore, the battery terminal riveting fixture 100 of this invention uses a reverse pulling riveting method to rivet the terminals 220 of the battery 200, effectively reducing the pressure on the battery cell 210 during riveting and avoiding any impact on the performance of the battery 200. Furthermore, if the battery 200 has leakage or poor sealing, it can be repaired by riveting again.

[0044] It is worth noting that, in the specific embodiments, although the battery terminal riveting fixture 100 of this utility model is described as including a riveting body 10, a rotating body 20, a rotary motor 30, a fixture frame 40, a sliding body 50, and a reciprocating driver 60, obviously, depending on actual needs, the battery terminal riveting fixture 100 of this utility model can also include a riveting body 10, a rotating body 20, and a rotary motor 30, or include a riveting body 10, a rotating body 20, a rotary motor 30, and a fixture frame 40. Furthermore, the riveting body 40 can be a cylindrical structure, but is not limited to this; the rotating body 20 can be a shaft structure, but is not limited to this; and the sliding body 50 can be a slider, but is not limited to this. In addition, regarding... Figure 2 In this context, the first direction can be understood as the vertical direction of the fixture frame 40. Finally, the reciprocating drive 60 can also be a linear motor directly connected to the sliding body 50, replacing the combination consisting of a rotary motor, a lead screw 70, and a lead screw nut 80.

[0045] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A battery terminal post riveting fixture, characterized in that, The device includes a press-fit body and a rotating body. The press-fit body has a through-hole extending along a first direction. The press-fit body has a first end face and a second end face arranged opposite to each other in the first direction. The first end face of the press-fit body has a press-fit portion arranged around the center line of the through-hole. The rotating body is rotatably inserted into the through-hole. The rotating body has a threaded structure exposed outward from the first end face of the press-fit body.

2. The battery terminal riveting fixture according to claim 1, characterized in that, The threaded structure also extends out of the riveting part; the threaded structure is an external threaded structure; the riveting part is a convex ring structure that protrudes outward from the first end face of the riveting body.

3. The battery terminal riveting fixture according to claim 2, characterized in that, The convex ring structure is a cone shape with the apex of the cone far away from the first end face of the press-fit body; the outer surface of the convex ring structure is a concave annular curved surface; the first end face of the press-fit body and the end face of the convex ring structure opposite to the first end face are each perpendicular to the center line of the through channel.

4. The battery terminal riveting fixture according to claim 1, characterized in that, It also includes a rotary motor for driving the rotating body to rotate relative to the riveting body, the rotary motor being arranged facing the second end face of the riveting body, and the output end of the rotary motor being assembled and connected to the rotating body.

5. The battery terminal riveting fixture according to claim 1, characterized in that, It also includes a fixture frame, a sliding body slidably disposed on the fixture frame along the first direction, and a reciprocating drive for driving the sliding body to reciprocate. The reciprocating drive is mounted on the fixture frame, and the rivet body is connected to the sliding body to follow the sliding body.

6. The battery terminal riveting fixture according to claim 5, characterized in that, The fixture frame includes a gantry support, the gantry support includes two legs and a crossbeam connected to the two legs, the crossbeam is provided with a guide rail located inside the gantry support and extending along the first direction, and the sliding body is slidably mounted on the guide rail; the reciprocating drive is mounted on the crossbeam, and the output end of the reciprocating drive faces the sliding body.

7. The battery terminal riveting fixture according to claim 6, characterized in that, The reciprocating drive is a rotary motor, and the output end of the rotary motor is connected to a transmission screw that extends along the first direction. The sliding body is provided with a transmission nut that slides on the transmission screw. The rotary motor drives the sliding body to reciprocate through the cooperation of the transmission screw and the transmission nut.

8. The battery terminal riveting fixture according to claim 6, characterized in that, The fixture frame also includes a base connected to the two legs, and the base is provided with a clamping structure for clamping the battery arranged opposite to the press-fit body in the first direction.

9. The battery terminal riveting fixture according to claim 5, characterized in that, It also includes a rotary motor for driving the rotating body to rotate relative to the riveting body, the rotary motor being arranged facing the second end face of the riveting body, the output end of the rotary motor being assembled and connected to the rotating body, and the rotary motor being also assembled at the sliding body.

10. The battery terminal riveting fixture according to claim 9, characterized in that, The second end face of the press-fit body is embedded in the sliding body. The press-fit body has a threaded hole that penetrates the second end face of the press-fit body. The threaded hole extends along the first direction and communicates with the through-channel. The rotary motor is embedded in the sliding body. The housing of the rotary motor has a threaded connection structure that is threadedly connected and fixed to the threaded hole.

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