Clamping device

Abstract

The utility model provides clamping equipment which is used for clamping a battery and comprises a base, the base comprises a lower-layer plate, an elastic piece and an upper-layer plate, the upper-layer plate is located above the lower-layer plate, the lower-layer plate and the upper-layer plate are elastically connected through the elastic piece, and the upper-layer plate is located above the lower-layer plate. The elastic force of the elastic piece is used for driving the upper-layer plate to move upwards relative to the lower-layer plate in the vertical direction; and the clamp is arranged on the upper layer plate and is used for clamping the battery. By means of the clamping device, the laser welding efficiency of the battery can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a clamping device. Background Art

[0002] In the field of modern battery manufacturing, laser welding technology is widely used in the connection between battery cells and cover plates due to its high precision and high efficiency. However, in the actual production process, especially in large-scale production lines, the efficiency problem of laser welding has gradually become prominent.

[0003] After the battery cell is placed in the shell, laser welding is usually used to ensure that the connection between the battery cell and the cover is firm and reliable. During laser welding, the distance between the welding position on the battery and the laser welding device must be accurately adjusted to ensure that the focus of the laser falls accurately on the welding position. This step is crucial to ensure welding quality.

[0004] However, in actual operation, especially when multiple batteries need to be welded continuously, it becomes very time-consuming to adjust the distance between the battery and the welding device one by one. This not only affects the welding efficiency, but also may increase production costs and even pose a potential threat to the stability of the production line.

[0005] Therefore, a fixture is needed that can adjust the height of the battery more quickly to improve the efficiency of laser welding on the battery. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a clamping device that can improve the efficiency of laser welding of batteries.

[0007] According to the first aspect of the present invention, a clamping device is used to clamp a battery, and the clamping device includes: a base, the base includes a lower plate, an elastic member and an upper plate, the upper plate is located above the lower plate, the lower plate and the upper plate are elastically connected by the elastic member, and the elastic force of the elastic member is used to drive the upper plate to move upward in a vertical direction relative to the lower plate; a clamp, the clamp is arranged on the upper plate, and is used to clamp the battery.

[0008] The clamping device according to the first embodiment of the utility model has at least the following beneficial effects: by setting the lower plate, the elastic member and the upper plate, the distance between the lower plate and the upper plate can be reduced when the upper plate is pressed, and when the upper plate is released, the upper plate will bounce up under the action of the elastic member. The clamp is set on the upper plate, and when the height of the battery on the clamp needs to be adjusted, the height of the upper plate is directly adjusted, so as to adjust the height of the top of the battery more quickly, especially when multiple clamps are set on the upper plate, the improved efficiency is more significant.

[0009] According to some embodiments of the utility model, the clamp includes a fixed part and a movable part, the fixed part is fixedly connected to the upper plate, and a fixed card slot is provided on the fixed part, and the fixed card slot is used to accommodate one side of the battery and abut against the battery; the movable part is slidably connected to the upper plate along the width direction of the battery, the movable part abuts against the battery, and presses the battery into the fixed card slot.

[0010] According to some embodiments of the utility model, the fixed slot includes a first side, a second side and a third side, the first side and the second side are both connected to the third side, the first side and the second side are opposite to and respectively abut against two opposite sides of the battery, and the third side abuts against the battery.

[0011] According to some embodiments of the present invention, a receiving groove is provided at a connection point between the third side surface and the first side surface, and at a connection point between the third side surface and the second side surface.

[0012] According to some embodiments of the present invention, the clamp further includes a limiting portion, which abuts against the bottom of the battery so that the bottom surfaces of the batteries on the multiple clamps are located at the same height.

[0013] According to some embodiments of the present invention, the limiting portion includes a height adjuster, and the height adjuster is used to adjust the height of the limiting portion in the vertical direction to adjust the height of the bottom of the battery.

[0014] According to some embodiments of the present invention, the clamp further includes a pulley, which is slidably disposed on the first side surface and the second side surface, and when the battery moves in a vertical direction, the pulley rolls with the battery.

[0015] According to some embodiments of the present invention, the elastic member includes a spring, which is arranged in a vertical direction, one end of the spring is connected to the lower plate, and the other end of the spring is connected to the upper plate.

[0016] According to some embodiments of the utility model, the elastic member also includes an upper sleeve and a lower sleeve, the lower sleeve is arranged on the lower plate, the upper sleeve is arranged on the upper plate, the lower sleeve is sleeved on the outside of the upper sleeve, and the upper sleeve slides in a vertical direction relative to the lower sleeve, one end of the spring is arranged in the lower sleeve, and the other end of the spring is arranged in the upper sleeve.

[0017] According to some embodiments of the utility model, a pressing device is also included, which includes a fixed seat, a telescopic rod and a pressing plate. The fixed seat is fixed relative to the lower plate, the fixed end of the telescopic rod is fixed on the fixed seat, and the movable end of the telescopic rod is fixed on the pressing plate to drive the pressing plate to move in a vertical direction, and the pressing plate abuts against the upward surface of the upper plate.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the clamping device in some embodiments of the utility model;

[0020] Figure 2 It is a front view of the clamping device in some embodiments of the utility model;

[0021] Figure 3 for Figure 1 Enlarged schematic diagram of the middle fixing part.

[0022] Figure Number:

[0023] 1. Clamp; 11. Fixing part; 111. First side surface; 112. Second side surface; 113. Third side surface; 114. Accommodating groove; 12. Moving part; 13. Limiting part; 14. Pulley; 2. Base; 21. Upper plate; 22. Lower plate; 23. Elastic member; 231. Spring; 232. Upper sleeve; 233. Lower sleeve; 3. Battery; 31. Width surface; 32. Thickness surface. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Battery cell laser welding technology is a high-precision welding method that uses the high energy density of the laser beam to achieve fast and efficient connection of battery cells. Compared with traditional welding methods, laser welding has many advantages, such as high precision, high efficiency, and low deformation. The working principle of laser welding is to use the high energy density of the laser beam to quickly heat the welding material to a molten state, and then connect the molten materials through the movement of the laser beam. Due to the fast heating speed and small heat-affected zone of laser welding, the welding deformation is small and the welding strength is high, which can meet the high-precision and high-efficiency requirements of battery cell manufacturing. In addition, laser welding technology can also realize non-contact welding, avoiding the problem of using auxiliary materials such as welding electrodes or welding wires in traditional welding methods, and further improving the welding quality and efficiency. However, during laser welding, it is necessary to adjust the distance between the focus of the laser and the welding to ensure the heating effect of the laser on the welding point.

[0029] The cover plate in the battery cell is a top cover on the power battery, which has many important functions. First of all, it plays a role of fixing and sealing. Through laser welding of the top cover and the aluminum shell, the bare battery cell can be wrapped and fixed and sealed to prevent leakage inside the battery cell and the entry of external impurities. Secondly, the cover plate has the function of current conduction. Through the welding conduction of the top cover pole, the adapter and the battery cell ear, the smooth conduction of the battery cell charging and discharging current can be ensured. During the welding process, it is particularly important to accurately locate the focus of the laser at the welding point, and the efficiency of adjusting the focal length by adjusting the movement of the laser welding setting is explained. Therefore, it is necessary to adjust the height of the battery welding surface so that the welding surface of the battery coincides with the moving plane of the focus.

[0030] The clamping device in the first embodiment of the utility model is used to clamp the battery 3, and the clamping device includes: a base 2 and a clamp 1, the base 2 includes a lower plate 22, an elastic member 23 and an upper plate 21, the upper plate 21 is located above the lower plate 22, the lower plate 22 and the upper plate 21 are elastically connected by the elastic member 23, and the elastic force of the elastic member 23 is used to drive the upper plate 21 to move upward relative to the lower plate 22 in the vertical direction; the clamp 1 is arranged on the upper plate 21, and is used to clamp the battery 3. The battery 3 is clamped by the clamp 1, and the welding surface on the top of the battery 3 is exposed above, that is, the cover plate of the battery 3 is located above. Since the clamp 1 is arranged on the upper plate 21, the clamp 1 will move with the up and down movement of the upper plate 21, and thereby adjust the height of the welding surface of the battery 3. After the battery 3 is clamped and fixed by the clamp 1, it is difficult to adjust the position of the battery 3 relative to the clamp 1. Therefore, the height of the clamp 1 is adjusted directly through the upper plate 21 to adjust the height of the welding position on the top of the battery 3, so that the distance between the welding position on the battery 3 and the welding equipment can be adjusted more quickly. An elastic member 23 is arranged between the upper plate 21 and the lower plate 22. By pressing the upper plate 21 downward, the elastic member 23 will shrink. At this time, the distance between the upper plate 21 and the lower plate 22 is reduced, and the height of the upper plate 21 is reduced, and the clamp 1 on the upper plate 21 is driven to descend, thereby driving the height of the battery 3 to descend, so as to increase the distance between the welding point on the battery 3 and the laser welding device. After adjusting the height of the battery 3 to a suitable position by pressing the upper plate 21, laser welding is performed, so that the focus of the laser falls accurately on the welding position to improve the effect of laser welding. It should be noted that on the upper plate 21, a plurality of clamps 1 are usually arranged, and each clamp 1 clamps a battery 3. After the clamp 1 lowers the battery 3 to clamp it, the heights of the batteries 3 are consistent. That is, the top covers or welding positions of multiple batteries 3 are located on the same horizontal plane. When adjusting the height of the upper plate 21, the heights of multiple batteries 3 can be lowered and adjusted to the correct position at the same time, thereby greatly improving the efficiency of laser welding.

[0031] According to some embodiments of the utility model, the fixture 1 includes a fixed part 11 and a movable part 12, the fixed part 11 is fixedly connected to the upper plate 21, and a fixed card slot is provided on the fixed part 11, and the fixed card slot is used to accommodate one side of the battery 3 and abut against the battery 3; the movable part 12 is slidably connected to the upper plate 21 along the width direction of the battery 3, and the movable part 12 abuts against the battery 3 and presses the battery 3 into the fixed card slot. When the battery 3 is placed on the fixture 1, the movable part 12 is first moved so that the movable part 12 is away from the fixed part 11, and then the battery 3 is placed in the position of the fixed part 11. After the battery 3 is placed, the movable part 12 is moved again, so that the battery 3 is clamped between the movable part 12 and the fixed part 11. Among them, the movable part 12 and the fixed part 11 both clamp the side of the battery 3, so that the top of the battery 3 can be completely exposed, so that the laser welding equipment can perform laser welding on the top cover of the battery 3.

[0032] When the moving part 12 is provided, a track and a compression spring may be provided on the upper plate 21, and the track is provided along the width direction of the battery 3. When the moving part 12 is away from the fixed part 11, the moving part 12 is driven by manual driving or a driving device so that the moving part 12 moves along the track and compresses the compression spring. After the battery 3 is placed on the fixed part 11, the compression spring drives the moving part 12 to approach the fixed part 11 and presses the battery 3 on the fixed part 11.

[0033] According to some embodiments of the utility model, the fixed card slot includes a first side surface 111, a second side surface 112 and a third side surface 113, the first side surface 111 and the second side surface 112 are both connected to the third side surface 113, the first side surface 111 and the second side surface 112 are opposite to each other and respectively abut on two opposite sides of the battery 3, and the third side surface 113 abuts against the battery 3. In order to enable the clamp 1 to clamp the battery 3 more stably, three sides are set in the fixed card slot to restrict the battery 3, wherein the third side surface 113 faces the moving part 12 and cooperates with the moving part 12 to clamp the battery 3. The first side surface 111 and the second side surface 112 are set on both sides of the third side surface 113, and squeeze the two sides of the battery 3, so as to prevent the battery 3 from being offset relative to the third side surface 113, so that the battery 3 is clamped more stably.

[0034] According to some embodiments of the utility model, a receiving groove 114 is provided at the connection between the third side surface 113 and the first side surface 111 and at the connection between the third side surface 113 and the second side surface 112. In the process of the mobile part 12 and the fixed part 11 clamping the battery 3, the battery 3 is subjected to the extrusion force and thus deforms. Among them, the surface in contact with the third side surface 113 is the thickness surface 32 of the battery 3. And the side adjacent to the thickness surface 32 of the battery 3 is the width surface 31 of the battery 3. When the third side surface 113 squeezes the thickness surface 32, the thickness surface 32 will be compressed due to the force on the thickness surface 32. The edge adjacent to the thickness surface 32 and the width surface 31 has a smaller deformation due to the support of the width surface 31. This results in that when the third side surface 113 and the thickness surface 32 are squeezed, most of the pressure is borne by the edge adjacent to the thickness surface 32 and the width surface 31, while the middle of the thickness surface 32 is subjected to very little pressure or even no force. Therefore, the receiving groove 114 is provided. When the battery 3 is deformed, the edge of the thickness surface 32 adjacent to the width surface 31 can enter the receiving groove 114, so that the middle part of the thickness surface 32 is subjected to more pressure to avoid damage to the battery 3.

[0035] According to some embodiments of the utility model, the clamp 1 also includes a limiting portion 13, and the limiting portion 13 abuts against the bottom of the battery 3 so that the bottom surfaces of the batteries 3 on multiple clamps 1 are at the same height. In order to ensure that the top height of the battery 3 remains consistent in each clamp 1, the bottom of the battery 3 is accurately limited. That is, when the height of the bottom of the battery 3 is consistent, the top height of the battery 3 is also consistent. When the battery 3 is installed on the clamp 1, the bottom surface of the battery 3 is abutted against the limiting portion 13, so that the height of the batteries 3 on multiple clamps 1 is consistent. Among them, multiple clamps 1 can use the limiting portion 13 to limit the bottom of the battery 3 respectively, or multiple clamps 1 can use the same limiting portion 13 to limit the bottom of the battery 3. Multiple clamps 1 use the same limiting portion 13 to limit the bottom of the battery 3, that is, one limiting portion 13 limits the bottom of multiple batteries 3.

[0036] According to some embodiments of the utility model, the limit portion 13 includes a height adjuster, which is used to adjust the height of the limit portion 13 in the vertical direction to adjust the height of the bottom of the battery 3. After a long period of use, the limit portion 13 may be worn, or the height of the limit portion 13 between multiple clamps 1 is inconsistent, resulting in inconsistent heights of the batteries 3 when the batteries 3 are placed on the clamp 1. Therefore, the height of the limit portion 13 is adjusted by a height adjustment device, so that the height of the batteries 3 is consistent. Specifically, a screw rod can be used to set the limit portion 13 on the screw rod, and the height of the limit portion 13 can be adjusted by rotating the screw rod. It should be noted that it is not necessary to adjust the height of the limit portion 13 every time the battery 3 is installed on the clamp 1. Only when the height of the limit portion 13 is offset, the height of the limit portion 13 needs to be calibrated by the height adjustment device.

[0037] According to some embodiments of the utility model, the clamp 1 further includes a pulley 14, which is slidably arranged on the first side surface 111 and the second side surface 112. When the battery 3 moves in the vertical direction, the pulley 14 rolls with the battery 3. When placing the battery 3 in the clamp 1, the battery 3 needs to be placed in the fixing portion 11 first. In order to avoid friction between the bottom of the battery 3 and the limiting portion 13, there is a certain interval between the bottom of the battery 3 and the limiting portion 13. After the battery 3 is clamped by the moving portion 12 and the fixing portion 11, the battery 3 moves downward and abuts against the limiting portion 13. In order to avoid friction between the battery 3 and the first side surface 111 or the second side surface 112 when the battery 3 moves downward, the pulley 14 is arranged to avoid damage to the battery 3. On the other hand, the battery 3 can also be placed in the clamp 1 by inserting it from top to bottom. If the bottom of the battery 3 rubs against the limiting portion 13 , not only the battery 3 will be damaged, but also the limiting portion 13 will be worn, so that the limiting portion 13 cannot accurately limit the battery 3 .

[0038] According to some embodiments of the utility model, the elastic member 23 includes a spring 231, which is arranged in the vertical direction, one end of the spring 231 is connected to the lower plate 22, and the other end of the spring 231 is connected to the upper plate 21. The elastic member 23 also includes an upper sleeve 232 and a lower sleeve 233, the lower sleeve 233 is arranged on the lower plate 22, the upper sleeve 232 is arranged on the upper plate 21, the lower sleeve 233 is sleeved on the outer side of the upper sleeve 232, and the upper sleeve 232 slides in the vertical direction relative to the lower sleeve 233, one end of the spring 231 is arranged in the lower sleeve 233, and the other end of the spring 231 is arranged in the upper sleeve 232. Through the cooperation of the spring 231 and the sleeve, the shaking of the upper plate 21 is avoided, and the movement of the upper plate 21 in the vertical direction is made more stable.

[0039] According to some embodiments of the utility model, a pressing device is also included, and the pressing device includes a fixed seat, a telescopic rod and a pressing plate. The fixed seat is fixed relative to the lower plate 22, the fixed end of the telescopic rod is fixed on the fixed seat, and the movable end of the telescopic rod is fixed on the pressing plate to drive the pressing plate to move in the vertical direction, and the pressing plate abuts against the upward surface of the upper plate 21. The pressing device synchronously adjusts the heights of the batteries 3 on multiple clamps 1 by pressing the upper plate 21. When the height of the battery 3 needs to be moved downward, the pressing device presses the upper plate 21 downward. When the height of the battery 3 needs to be moved upward, the pressing device releases the upper plate 21 upward, and at this time, the elastic member 23 drives the upper plate 21 to move upward.

[0040] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A clamping device, characterized in that: Used to clamp a battery, the clamping device comprises: A base, the base comprising a lower plate, an elastic member and an upper plate, the upper plate being located above the lower plate, the lower plate and the upper plate being elastically connected via the elastic member, and the elastic force of the elastic member being used to drive the upper plate to move upward relative to the lower plate in a vertical direction; A clamp is arranged on the upper plate and is used for clamping the battery.

2. The clamping device according to claim 1, characterized in that The clamp includes a fixed part and a movable part, the fixed part is fixedly connected to the upper plate, and a fixed card slot is provided on the fixed part, and the fixed card slot is used to accommodate one side of the battery and abut against the battery; the movable part is slidably connected to the upper plate along the width direction of the battery, the movable part abuts against the battery and presses the battery into the fixed card slot.

3. The clamping device according to claim 2, characterized in that The fixed card slot includes a first side surface, a second side surface and a third side surface, the first side surface and the second side surface are both connected to the third side surface, the first side surface and the second side surface are opposite to and respectively abut against two opposite sides of the battery, and the third side surface abuts against the battery.

4. The clamping device according to claim 3, characterized in that A receiving groove is formed at a connection point between the third side surface and the first side surface and at a connection point between the third side surface and the second side surface.

5. The clamping device according to claim 2, characterized in that The clamp further comprises a limiting portion, which abuts against the bottom of the battery so that the bottom surfaces of the batteries on the multiple clamps are located at the same height.

6. The clamping device according to claim 5, characterized in that The limiting portion includes a height adjuster, and the height adjuster is used to adjust the height of the limiting portion in the vertical direction to adjust the height of the bottom of the battery.

7. The clamping device according to claim 3, characterized in that The clamp further includes a pulley, which is slidably disposed on the first side surface and the second side surface, and when the battery moves in a vertical direction, the pulley rolls along with the battery.

8. The clamping device according to claim 5, characterized in that The elastic member comprises a spring, which is arranged in a vertical direction, one end of the spring is connected to the lower plate, and the other end of the spring is connected to the upper plate.

9. The clamping device according to claim 8, characterized in that The elastic member also includes an upper sleeve and a lower sleeve, the lower sleeve is arranged on the lower plate, the upper sleeve is arranged on the upper plate, the lower sleeve is sleeved on the outside of the upper sleeve, and the upper sleeve slides in a vertical direction relative to the lower sleeve, one end of the spring is arranged in the lower sleeve, and the other end of the spring is arranged in the upper sleeve.

10. The clamping device according to claim 1, characterized in that It also includes a pressing device, which includes a fixed seat, a telescopic rod and a pressing plate. The fixed seat is fixed relative to the lower plate, the fixed end of the telescopic rod is fixed on the fixed seat, and the movable end of the telescopic rod is fixed on the pressing plate to drive the pressing plate to move in a vertical direction, and the pressing plate abuts against the upward surface of the upper plate.

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