Clamping mechanism, clamping device and busbar welding equipment
By designing a clamping mechanism with synchronous pressure and a laser welding device for gantry, the problem of axis offset in the battery cell module is solved, and the tight welding of the busbar and the battery cell module is realized, which improves the welding efficiency and quality.
Patent Information
- Application Number
- CN202323601373.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-27
AI Technical Summary
During the bus welding and installation process of the battery cell module, the pressure action on both sides cannot occur simultaneously, resulting in the central axis of the battery cell module being offset, which is not conducive to the welding and installation of the bus.
A clamping mechanism is designed, including an active part and a driven part, and the synchronous pressure and disengagement of the clamp is achieved through a linear driver and a pressure sensor to ensure that the busbar is closely fitted on both sides of the battery module, and through the gantry and Laser welding device realizes efficient welding.
It effectively reduces the possibility of axis deviation in the battery cell module, ensures close welding of the busbar and the battery cell module, prevents poor welding, and improves welding efficiency and quality.
Smart Images
Figure CN222154436U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery manufacturing, in particular to a clamping mechanism, a clamping device and busbar welding equipment. Background Art
[0002] After the battery cells are stacked into a battery module, the battery module will be fixed on a tray. After that, the battery module and the tray are transported by the assembly line to the busbar welding station. Since the poles are distributed on opposite sides of the battery module, at the busbar welding station, before welding the busbar to the opposite sides of the battery module, the busbar must be pressed against the opposite sides of the battery module. Then, since the pressing action on both sides cannot occur synchronously, the central axis of the battery module is offset, which is not conducive to the welding of the busbar. Utility Model Content
[0003] The utility model provides a clamping mechanism, a clamping device and a busbar welding device, which are used to solve the problem in the prior art that the pressing action on both sides cannot occur synchronously, causing the central axis of the battery module to shift, which is not conducive to the welding of the busbar.
[0004] On the one hand, the utility model provides a clamping mechanism, comprising:
[0005] The active part is capable of linear reciprocating motion; guide holes are respectively provided on opposite sides of the active part;
[0006] There are two clamps, which are respectively arranged on the opposite sides of the active part; the adjacent sides of the two clamps are respectively provided with driven parts; the driven parts on both sides can move in the guide holes on the corresponding sides respectively;
[0007] When the active part moves in a straight line, the driven parts on both sides move toward each other, so that the two clamps move toward each other, or the driven parts on both sides move in opposite directions, so that the two clamps move in opposite directions.
[0008] In some of the embodiments, the driven part is rotatably mounted on the top of the clamp through a rotating shaft, or through a bolt and a fixed shaft; the driven part can rotate when moving in the guide hole.
[0009] In some embodiments, it also includes:
[0010] A base is installed below the active part;
[0011] The top surface of the base is provided with a first slide rail along the length direction of the body and / or the opposite sides of the top surface of the base are provided with second slide rails along the width direction of the body. Correspondingly, the bottom surface of the active part is provided with a first slide groove matched with the first slide rail and / or the inner top surface of each clamp is provided with a second slide groove matched with the second slide rail.
[0012] In some embodiments, it also includes:
[0013] The linear drive has an output shaft fixedly connected to one end of the active part.
[0014] In some embodiments, it also includes:
[0015] The pressure sensor is installed at the connection between the linear actuator and the active part.
[0016] In some embodiments, it also includes:
[0017] There are two pressing tools, which are installed at the bottom of the clamps in one-to-one correspondence with the two clamps and can move with the clamps.
[0018] In some of the embodiments, three or more guide holes are respectively provided on two opposite sides of the active part; and three or more driven parts are respectively provided on adjacent sides of the two clamps.
[0019] In some of the embodiments, a first through hole is provided on the active portion;
[0020] and / or, each clamp is provided with a second through hole;
[0021] And / or, each of the clamps is provided with a third through hole.
[0022] On the other hand, the utility model further provides a clamping device, comprising a door frame and the clamping mechanism provided by any of the above embodiments;
[0023] There are two door frames, which are respectively installed at the bottoms of the opposite ends of the base of the clamping mechanism.
[0024] On the other hand, the utility model also provides a busbar welding device, including the clamping device provided by any of the above embodiments.
[0025] The beneficial effects of the utility model are as follows: the clamping mechanism of the utility model is provided with an active part, which moves in a straight line, and the driven parts on both sides move toward each other, so that the two clamps move toward each other. In this process, the busbars located on the opposite sides of the battery cell module are tightly pressed against the corresponding sides of the battery cell module by the pressing force brought by the clamps on the corresponding sides. After the busbar is welded, when the active part moves in a straight line, the driven parts on both sides move back to back, so that the two clamps move back to back, and then the two clamps are separated from the welded busbar respectively. Compared with the traditional clamping mechanism, the two clamps press synchronously, which reduces the possibility of the center axis of the battery cell module being offset, which is beneficial to the welding of the busbar. Compared with the cylinder clamping form, the pressing force pressed against the opposite sides of the battery cell module is basically the same, which also reduces the possibility of the center axis of the battery cell module being offset. Since the central axis of the battery cell module can be guaranteed not to shift, there is no need to deliberately reduce the pressing force on the opposite sides of the battery cell module. As a result, a greater pressing force can be applied to the opposite sides of the battery cell module, thereby ensuring that the bus and the battery cell module are tightly fitted during welding and preventing poor welding. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of some specific embodiments of a clamping mechanism of the utility model;
[0027] Figure 2 yes Figure 1 A partial enlarged view of the middle A area;
[0028] Figure 3 yes Figure 1 A partial enlarged view of the middle B area;
[0029] Figure 4 yes Figure 1 A partial enlarged view of the middle C area;
[0030] Figure 5 yes Figure 1 A schematic diagram of the internal structure of the clamping mechanism shown;
[0031] Figure 6 It is a structural schematic diagram of some specific embodiments of a busbar welding device of the utility model.
[0032] In the accompanying drawings, 100, clamping mechanism; 110, active part; 111, guide hole; 120, fixture; 121, driven part; 130, base; 131, first slide rail; 132, second slide rail; 140, linear drive; 150, press; 160, connecting block; 170, pressure sensor; 200, frame. DETAILED DESCRIPTION
[0033] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] As mentioned in the background technology, since the poles are distributed on opposite sides of the cell module, at the busbar welding station, before welding the busbar on opposite sides of the cell module, the busbar needs to be pressed against the opposite sides of the cell module. Then, since the pressing action on both sides cannot occur synchronously, the central axis of the cell module is offset, which is not conducive to the welding of the busbar.
[0035] To improve the above problems, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The utility model provides a clamping mechanism 100, including a base 130, an active part 110 and two clamps 120. The base 130 is installed below the active part 110, and its position cannot be changed. The active part 110 is slidably installed on the base 130 and can perform linear reciprocating motion. Guide holes 111 are respectively provided on the opposite sides of the active part 110. It should be noted that the guide hole 111 is an inclined hole, and the extension direction of the inclined hole forms an angle of 30°-60° with the body length direction of the active part 110. The two clamps 120 are respectively arranged on the opposite sides of the active part 110. The adjacent sides of the two clamps 120 are respectively provided with driven parts 121. The driven parts 121 on both sides can move laterally and longitudinally in the guide holes 111 on the corresponding sides.
[0036] It should be pointed out that the busbar welding station is located below the base 130. When the tray and the battery module arrive at the busbar welding station along the assembly line, the active part 110 moves in a straight line, and the driven parts 121 on both sides move toward each other, so that the two clamps 120 move toward each other. In this process, the buses located on the opposite sides of the battery cell module are tightly pressed against the corresponding sides of the battery cell module by the pressing force brought by the clamps 120 on the corresponding sides. After the busbar welding is completed, when the active part 110 moves in a straight line, the driven parts 121 on both sides move back to back, so that the two clamps 120 move back to back, and then the two clamps 120 are respectively separated from the busbar after welding. Compared with the traditional clamping mechanism 100, the two clamps 120 press synchronously, which reduces the possibility of the central axis of the battery cell module being offset, which is beneficial to the welding of the busbar. Compared with the form that relies on cylinder clamping, the pressing force on the two opposite sides of the battery cell module is basically the same, which also reduces the possibility of the center axis of the battery cell module shifting. Since it is possible to ensure that the center axis of the battery cell module does not shift, there is no need to deliberately reduce the pressing force on the two opposite sides of the battery cell module, and thus a greater pressing force can be applied to the two opposite sides of the battery cell module, ensuring that the bus and the battery cell module are tightly fitted during welding, and preventing poor welding. The clamping mechanism 100 has a simple overall structure, low manufacturing cost, strong rigidity, is not easy to deform during long-term use, and has a long service life.
[0037] Preferably, the base 130 is a square plate-shaped structure, and the top surface is used to support the active part 110 . Compared with structures such as triangular pyramids and spheres, this not only enables the base 130 to be lightweight in design, but also facilitates the processing and forming of the base 130 .
[0038] Preferably, the active part 110 is a square plate structure, which not only enables the base 130 to be lightweight in design but also facilitates the processing and forming of the base 130 compared to structures such as triangular pyramids and spheres.
[0039] Preferably, the cross-section of each clamp 120 is a “┑”-shaped structure, and the tops of the two clamps 120 are respectively hung on opposite sides of the top surface of the base 130, and the busbars located on opposite sides of the battery cell module can be respectively supported on the corresponding sides of the battery cell module through the lower parts of the two clamps 120.
[0040] Preferably, the driven part 121 is rotatably mounted on the top of the clamp 120 through a rotating shaft, or through a bolt and a fixed shaft. The driven part 121 can rotate when moving in the guide hole 111. Compared with the form in which the driven part 121 is non-rotatably mounted on the top of the clamp 120, since the driven part 121 can rotate, the driven part 121 can move more smoothly in the lateral and longitudinal directions in the guide hole 111, and the driven part 121 is prevented from being stuck in the guide hole 111, thereby improving the smoothness of the movement of the driven part 121 and the clamp 120. Specifically, the driven part 121 can be a bearing, a roller, a ball, etc.
[0041] In some embodiments, the top surface of the base 130 is provided with a first slide rail 131 along the length direction, and correspondingly, the bottom surface of the active part 110 is provided with a first slide groove matched with the first slide rail 131. The active part 110 is slidably connected to the top surface of the base 130 through the first slide groove and the first slide rail 131 to ensure smooth movement of the active part 110.
[0042] In other embodiments, the second slide rails 132 are respectively provided on opposite sides of the top surface of the base 130 along the body width direction, and correspondingly, the inner top surface of each clamp 120 is provided with a second slide groove matched with the second slide rail 132. The inner top surface of each clamp 120 is slidably connected to the top surface of the base 130 through the second slide groove and the second slide rail 132, which not only ensures the smoothness of the movement of the clamp 120, but also ensures that the clamp 120 can only move horizontally.
[0043] In some other embodiments, the top surface of the base 130 is provided with a first slide rail 131 along the body length direction, and the opposite sides of the top surface of the base 130 are respectively provided with second slide rails 132 along the body width direction. Correspondingly, the bottom surface of the active part 110 is provided with a first slide groove adapted to the first slide rail 131, and the inner top surface of each clamp 120 is provided with a second slide groove adapted to the second slide rail 132. The active part 110 is slidably connected to the top surface of the base 130 through the first slide groove and the first slide rail 131 to ensure the smoothness of the movement of the active part 110. The inner top surface of each clamp 120 is slidably connected to the top surface of the base 130 through the second slide groove and the second slide rail 132, which not only ensures the smoothness of the movement of the clamp 120, but also ensures that the clamp 120 can only move horizontally.
[0044] Specifically, in the exemplary embodiment, the clamping mechanism 100 further includes a linear driver 140, the output shaft of which is directly fixedly connected to one end of the active part 110, and can drive the active part 110 to perform linear reciprocating motion. Compared with the manual driving method, the working efficiency and the degree of automation are improved.
[0045] Preferably, the linear drive 140 can be a servo electric cylinder, which has higher control accuracy, so that the control accuracy of the resistance force is higher, and the resistance force on both sides is basically consistent. The linear drive 140 can also be an electric push rod, which can control the thrust and speed by adjusting the pitch, and can achieve very precise positioning and motion control. It does not require the use of liquid or gas and other working fluids during operation, so there will be no problem of hydraulic oil or gas leakage polluting the working environment, and the environmental protection performance is better. At the same time, it is easy to install and has low maintenance costs. Of course, the linear drive 140 can also be a hydraulic cylinder or a pneumatic cylinder, with relatively stable power output, faster action, strong reliability, simple structure, and low maintenance costs.
[0046] In some embodiments, the clamping mechanism 100 further includes a connecting block 160 and a pressure sensor 170. The output shaft of the linear actuator 140 is fixedly connected to one end of the active part 110 through the connecting block 160. The pressure sensor 170 is mounted on the connecting block, and can detect the pressure at the end of the output shaft of the linear actuator 140, and transmit the detected pressure signal to the controller, which controls the linear actuator 140 to move, so as to prevent the active part 110 from excessive movement.
[0047] In other embodiments, in-position detection sensors are installed at opposite ends of the top surface of the base 130, respectively, for detecting the opposite ends of the active part 110, and transmitting the detected signals to the controller, which controls the linear drive 140 to operate to prevent the active part 110 from excessive movement.
[0048] Specifically, in the exemplary embodiment, two pressers 150 are further included, and the two pressers 150 are installed at the bottom of the clamp 120 in a one-to-one correspondence with the two clamps 120, and can move with the clamp 120. When it is necessary to press the busbars located on the opposite sides of the battery module tightly against the corresponding sides of the battery module, the two pressers 150 move with the two clamps 120 and press against the busbars on the corresponding sides, so that the busbars on the corresponding sides are tightly attached to the battery module.
[0049] Preferably, the press 150 is in the shape of a long strip, and is evenly provided with a plurality of laser-perforated holes along the length direction of the body. The press 150 is detachably connected to the fixture 120 by bolts, so as to facilitate the disassembly and assembly of the press 150. Nitrogen blowing holes and dust extraction holes are also provided on the press 150, so as to facilitate blowing nitrogen to the welding point and extract the smoke and dust around the welding point.
[0050] Preferably, three, four, five or more guide holes 111 are respectively provided on opposite sides of the active part 110. Correspondingly, four, five or more driven parts 121 are respectively provided on adjacent sides of the two clamps 120. In this way, the stability and smoothness of the two clamps 120 when moving toward or away from each other are guaranteed.
[0051] In some embodiments, the active part 110 is evenly provided with a plurality of first through holes along the length direction of the active part 110 , and the first through holes can be used for the wire harness to pass through, so that the active part 110 can be designed to be lightweight.
[0052] In other embodiments, the upper portion of each clamp 120 is evenly provided with a plurality of second through holes along the length direction of the clamp 120, and the second through holes can be used for the wire harness to pass through, thereby achieving a lightweight design of the clamp 120.
[0053] In some other embodiments, a plurality of third through holes are evenly arranged at the lower portion of each clamp 120 along the length direction of the clamp 120, and the third through holes can be used for wiring harnesses or pipelines to pass through, thereby achieving a lightweight design of the clamp 120.
[0054] In some further embodiments, a plurality of first through holes are evenly arranged on the active part 110 along the length direction of the active part 110, and the first through holes can be used for the wire harness to pass through. At the same time, the active part 110 is lightweight in design. In addition, a plurality of second through holes are evenly arranged on the upper part of each clamp 120 along the length direction of the clamp 120, and the second through holes can be used for the wire harness to pass through. At the same time, the clamp 120 is lightweight in design. A plurality of third through holes are evenly arranged on the lower part of each clamp 120 along the length direction of the clamp 120, and the third through holes can be used for the wire harness or pipeline to pass through. At the same time, the clamp 120 is lightweight in design.
[0055] The utility model also provides a clamping device, including two door frames and a clamping mechanism 100 provided by any of the above-mentioned specific embodiments. The two door frames are respectively fixedly mounted on the bottom of the opposite ends of the base 130 of the clamping mechanism 100, and are used to support the two ends of the base 130, so that the position stability of the base 130 is relatively high. It should be noted that the busbar welding station is located below the base 130. The middle part of one of the door frames is hollow to form a battery cell module insertion hole, and the power cell module is moved to the busbar welding station. The middle part of the other door frame is hollow to form a battery cell module exit hole, and the power cell module is moved out of the busbar welding station. The shell of the linear drive 140 is fixedly mounted on the top of a door frame. When the active part 110 moves in a straight line, the driven parts 121 on both sides move toward each other, so that the two clamps 120 move toward each other, and then the two clamps 120 abut against the opposite sides of the battery cell module, so that the busbars located on the opposite sides of the battery cell module are respectively pressed tightly against the corresponding sides of the battery cell module. Alternatively, when the active part 110 moves in a straight line, the driven parts 121 on both sides move back to back, so that the two clamps 120 move back to back, and then the two clamps 120 are respectively separated from the battery cell module. Compared with the traditional clamping mechanism 100, the two clamps 120 press synchronously, which reduces the possibility of the center axis of the battery cell module being offset, which is beneficial to the welding of the busbar. Compared with the cylinder clamping form, the pressing force against the opposite sides of the battery cell module is basically the same, which also reduces the possibility of the center axis of the battery cell module being offset. Since the central axis of the battery cell module can be guaranteed not to shift, there is no need to deliberately reduce the pressing force on the opposite sides of the battery cell module. As a result, a greater pressing force can be applied to the opposite sides of the battery cell module, thereby ensuring that the bus and the battery cell module are tightly fitted during welding and preventing poor welding.
[0056] Preferably, each door frame includes two columns and a crossbar. The two ends of the crossbar are fixedly connected to the tops of the two columns respectively, and the middle part is fixedly connected to the bottom surface of the base 130. The overall structure of each door frame is relatively simple, which effectively reduces the manufacturing cost of the door frame.
[0057] Reference Figure 6 The utility model also provides a busbar welding device, comprising a frame 200, a clamping device provided in any of the above-mentioned specific embodiments, and two sets of laser welding devices. The clamping device is fixedly mounted on the frame 200 through a door frame. The two sets of laser welding devices are respectively mounted on opposite sides of the clamping device. After the two presses 150 move with the two clamps 120 and are respectively pressed against the busbars on the corresponding sides so that the busbars on the corresponding sides are tightly fitted to the battery module, the lasers emitted by the two sets of laser welding devices can respectively pass through the laser perforations on the presses 150 on the corresponding sides to weld the busbars on the corresponding sides to the battery module.
[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0061] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A clamping mechanism, characterized in that: include: The active part is capable of linear reciprocating motion; guide holes are respectively provided on opposite sides of the active part; There are two clamps, which are respectively arranged on opposite sides of the active part; the adjacent sides of the two clamps are respectively provided with driven parts; the driven parts on both sides can move in the guide holes on the corresponding sides; When the active part moves in a straight line, the driven parts on both sides move toward each other, so that the two clamps move toward each other, or the driven parts on both sides move in opposite directions, so that the two clamps move in opposite directions.
2. The clamping mechanism according to claim 1, characterized in that: The driven part is rotatably mounted on the top of the clamp through a rotating shaft, or through a bolt and a fixed shaft; the driven part can rotate when moving in the guide hole.
3. The clamping mechanism according to claim 1, characterized in that: Also includes: A base, installed below the active part; The top surface of the base is provided with a first slide rail along the length direction of the body and / or the opposite sides of the top surface of the base are respectively provided with second slide rails along the width direction of the body. Correspondingly, the bottom surface of the active part is provided with a first slide groove adapted to the first slide rail and / or the inner top surface of each of the clamps is provided with a second slide groove adapted to the second slide rail.
4. The clamping mechanism according to any one of claims 1 to 3, characterized in that: Also includes: The linear drive has an output shaft fixedly connected to one end of the active part.
5. The clamping mechanism according to claim 4, characterized in that: Also includes: A pressure sensor is installed at the connection between the linear drive and the active part.
6. The clamping mechanism according to any one of claims 1 to 3, characterized in that: Also includes: There are two pressers, which are installed at the bottom of the clamps in a one-to-one correspondence with the two clamps and can move with the clamps.
7. The clamping mechanism according to any one of claims 1 to 3, characterized in that: More than three guide holes are respectively provided on opposite sides of the active part; and more than three driven parts are respectively provided on adjacent sides of the two clamps.
8. The clamping mechanism according to any one of claims 1 to 3, characterized in that: The active part is provided with a first through hole; And / or, each of the clamps is provided with a second through hole; And / or, each of the clamps is provided with a third through hole.
9. A clamping device, characterized in that: comprising a door frame and a clamping mechanism according to any one of claims 1 to 8; There are two door frames, which are respectively installed at the bottoms of the opposite ends of the base of the clamping mechanism.
10. A busbar welding device, characterized in that: Comprising the clamping device as claimed in claim 9.