Clamp for battery and welding process for end part of battery

Abstract

The invention relates to the technical field of batteries, in particular to a clamp for a battery and a welding process for the end of the battery, the clamp comprises a bottom plate and a side plate, the side plate is provided with a limiting plate, the bottom plate is provided with a movable pushing part, and a space for placing the battery is formed between the pushing part and the limiting plate. The side plate is provided with a limiting assembly between the pushing part and the limiting plate; a movable limiting piece I is arranged on the limiting plate, a limiting hole is formed in the limiting piece I, the aperture of the limiting hole is equal to the diameter of the joint of the connecting column and the battery, and the circle center of the limiting hole is located on the axis of the pushing part. The battery fixing device can adapt to batteries with different heights through movable arrangement of the pushing part, the limiting hole is formed, the hole diameter of the limiting hole is equal to the connecting position of the connecting column and the battery, namely the diameter of the bottom of the connecting part, and the circle center of the limiting hole is located on the axis of the pushing part, namely the axis of the battery; therefore, the connecting column and the battery can be ensured to be coaxial.

Description

Technical Field

[0001] The invention relates to the technical field of batteries, and in particular to a clamp for batteries and a welding process for battery ends. Background Art

[0002] The car starting battery is a lithium-ion battery / lead-acid battery / nickel-metal hydride and nickel-cadmium battery specially used for starting, lighting, ignition, and power supply of vehicles, ships, and aircraft. It is abbreviated as SLI and SLIG after the 1980s. At the same time, the car starting battery includes a shell and several batteries built into the shell, such as the structure shown in patent number 2023211298447. The battery end is to be welded with a connecting column, and during the welding process, a clamp is required to clamp the battery to limit the position, but the existing clamps can generally only clamp one type of battery, so it cannot adapt to different types of batteries. At the same time, errors are inevitable in the placement of the connecting column, so it is impossible to ensure that the connecting column and the battery are coaxial. Summary of the invention

[0003] The purpose of the present invention is to provide a battery clamp and a welding process for the battery end, which can adapt to batteries of different heights through the movable setting of the pushing part, and a limiting hole is provided, and the hole diameter of the limiting hole is equal to the diameter of the connection point of the connecting column, and the center of the limiting hole is located on the axis of the pushing part, that is, on the axis of the battery, so as to ensure that the connecting column and the battery are coaxial, thereby solving the problem of being unable to adapt to batteries of different models and being unable to ensure that the connecting column and the battery are coaxial.

[0004] The object of the present invention is achieved in that: A clamp for a battery, comprising a bottom plate and a side plate arranged on the bottom plate, wherein a limit plate is arranged on the top of the side plate, a movable pushing part is arranged on the bottom plate, and the pushing part is matched with a groove at the bottom of the battery, and a space for placing the battery is provided between the pushing part and the limit plate, and a limit assembly for limiting the tilting of the battery is arranged between the pushing part and the limit plate on the side plate; A movable limiting member is arranged on the limiting plate, and an arc groove is opened on the side of the limiting plate away from the side plate, a limiting hole is arranged on the limiting member, and the aperture of the limiting hole is equal to the diameter of the connection between the connecting column and the battery, and the center of the limiting hole is located on the axis of the pushing part.

[0005] Preferably, the bottom plate is provided with a moving groove, and the bottom of the pushing portion is located in the moving groove and a spring is provided between the pushing portion and the moving groove.

[0006] Preferably, the limiting member 1 is rotatably arranged on the limiting plate, and the limiting member 1 is provided with a hole on one side of the limiting hole for avoiding interference with the connecting column; Alternatively, the limiting member 1 includes a rotating plate 1 and a rotating plate 2, and the rotating plate 1 and the rotating plate 2 are assembled to form a limiting hole.

[0007] Preferably, the limiting assembly includes a limiting block and a limiting member 2, and the limiting block is provided with an arc groove 2 on the side away from the side plate, and the arc groove 2 is in contact with the outer side of the battery, and the center of the arc groove 2 is located on the axis of the pushing part, the limiting member 2 is rotatably arranged on one side of the side plate, and there is a space for placing the battery between the arc groove 2 and the limiting member 2.

[0008] Preferably, the second limiting member comprises a mounting plate, and a rotatable swing rod is arranged on the mounting plate, and an abutment portion is arranged at one end of the swing rod, and the abutment portion is brought into contact with the battery by rotating the swing rod; Or / and, the bottom plate is provided with a placement groove corresponding to the bottom of the battery, and the pushing part is located in the placement groove.

[0009] Preferably, the side plate includes a fixed portion and a movable portion, and the bottom of the movable portion is movably arranged in the fixed portion, and a limit plate is arranged on the movable portion; The second limiting member is rotatably arranged on the mounting block, and a convex block is arranged on a side of the mounting block close to the side plate, and a plurality of limiting grooves are arranged on the fixed part and the movable part.

[0010] Preferably, the limiting assembly comprises a rotatable clamping member 1, and the clamping members 1 are two and symmetrically arranged, and a spring 2 is arranged between the clamping member 1 and the side plate; Alternatively, the limiting assembly includes a movable clamping part 2 and a clamping part 3, and there is a space for placing the battery between the clamping part 2 and the clamping part 3, a rack is provided on one side of the clamping part 2 and the clamping part 3, and a gear 1 is provided between the clamping part 2 and the clamping part 3, and the gear 1 is meshed with the rack, so that the clamping part 3 is driven to move synchronously by moving the clamping part 2.

[0011] Preferably, a rotatable brush is provided on the limit plate, and a marker is stained on the brush. When the brush is rotated to a specified position, the battery is rotated to see whether the outer side surfaces of the welded connecting columns are stained with the marker.

[0012] The welding process of the battery end includes the following steps: S1. Prepare the battery and connecting column to be welded, wherein the connecting column includes a column body and a connecting portion, and the connecting portion is a frustum, and the angle between the inclined surfaces on both sides of the frustum is 80 degrees to 90 degrees; S2. Place the battery on a fixture as shown in any of the above items. At this time, the battery is located between the limiting plate and the pushing part, and the limiting hole of the limiting member 1 is located above the battery. Then place the connecting column on the battery, and place the bottom of the round table in the limiting hole. After the placement is correct, move the limiting member 1 to a position that does not affect welding. S3, press the switch of the laser welding machine, then the battery and the fixture rotate synchronously and start welding; S4. After welding is completed, inspect the welding quality.

[0013] Preferably, the laser welding machine is provided with a rotating cylinder, and a synchronously rotating mounting frame is provided on the rotating cylinder, and the bottom plate is detachably provided on the mounting frame and rotates synchronously with the mounting frame; The mounting frame is provided with a rotatable hook and a movable push rod 1, and one end of the push rod 1 is located outside the mounting frame, and the other end of the push rod 1 contacts the hook to push the hook to rotate, the bottom of the hook is located inside the mounting frame, and a spring 3 is provided between the hook and the mounting frame on a side away from the push rod 1, and the top of the hook passes through the mounting frame to be exposed, a mounting groove is provided at the bottom of the bottom plate, and a clamping groove is provided on the inner wall of the mounting groove corresponding to the hook; Alternatively, the mounting frame is provided with a rotatable clamping member 4 and a clamping member 5 and a movable push rod 2, and the clamping member 4 and the clamping member 5 are located in the mounting frame, and a gear 2 is provided at one end of the clamping member 4 and the clamping member 5, and a plurality of teeth are provided on both sides of the push rod 2 corresponding to the gear 2, a column is provided at the bottom of the base plate, and the column can be inserted into the mounting frame, and the clamping member 4 and the clamping member 5 are driven to open or close by moving the push rod 2.

[0014] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects: 1. The present invention can adapt to batteries of different heights by movably setting the pushing part, and is provided with a limiting hole, and the aperture of the limiting hole is equal to the diameter of the connection between the connecting column and the battery, and the center of the limiting hole is located on the axis of the pushing part, that is, on the axis of the battery, thereby ensuring that the connecting column and the battery are coaxial.

[0015] 2. The preferred solution of the present invention is to limit the two sides of the battery by matching the arc groove 2 and the limiting member 2, thereby ensuring that the battery will not tilt.

[0016] 3. The preferred solution of the present invention is to further adjust the height by setting the moving part, thereby expanding the adaptation range.

[0017] 4. The preferred solution of the present invention is to adapt to batteries with different diameters by providing a rotatable clamping member 1 or movable clamping members 2 and 3.

[0018] 5. The preferred solution of the present invention is to provide a brush with a marker, such as powder, to rotate the battery to see whether the outer side surfaces of the welded connecting posts are all stained with the marker, thereby checking to ensure coaxiality after welding.

[0019] 6. The preferred solution of the present invention is that the hook and the push rod 1 are matched or the clamping member 4, the clamping member 5 and the push rod 2 are matched, so as to realize the detachable connection of the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 for Figure 1 Schematic diagram of the cross-section structure.

[0022] Figure 3 It is a schematic diagram of the structure of the hook and the push rod.

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the mounting frame and the base plate.

[0024] Figure 5 It is a schematic diagram of the structure of the holding member 4, the clamping member 5 and the push rod 2.

[0025] Figure 6 It is a schematic diagram of the structure with placement slots.

[0026] Figure 7 It is a schematic diagram of the structure with a moving part.

[0027] Figure 8 for Figure 7 Schematic cross-section of some structures.

[0028] Fig. 9 It is a schematic diagram of the structure with a clamping member 1.

[0029] Fig.10 It is a schematic diagram of the structure with clamping part two and clamping part three.

[0030] Fig.11 It is a schematic diagram of the structure of clamping member two and clamping member three.

[0031] Fig.12 It is a schematic diagram of the structure of the limiting member 1 and the limiting plate.

[0032] Fig.13 It is a schematic diagram of the structure of rotating plate 1, rotating plate 2 and limiting plate.

[0033] Fig.14 Schematic diagram of the structure of the battery and connecting column.

[0034] Reference numerals: 1-bottom plate; 11-moving slot; 12-placing slot; 13-installing slot; 14-card slot; 15-column; 2-side plate; 21-fixed part; 22-movable part; 23-limiting groove; 24-positioning bead; 25-connecting groove; 3-pushing part; 31-convex edge; 4-limiting plate; 41-arc groove one; 5-limiting member one; 51-limiting hole; 52-opening; 53-rotating plate 1; 54-rotating plate 2; 60-gear 1; 61-limiting block; 611-arc groove 2; 62-limiting member 2; 621-mounting plate; 622-swing rod; 623-abutting part; 624-hand-held part; 63-mounting block; 631-protrusion; 66-clamping member 1; 67-clamping part 2; 68-clamping part 3; 69-rack; 71-brush; 72-limiting column 1; 73-limiting column 1; 81-battery; 82-connecting column; 821-column; 822-connecting part; 9-mounting frame; 91-hook; 911-arc groove three; 912-rotating shaft; 913-installing column; 92-push rod one; 921-pushing block; 93-spring three; 94-clamping piece four; 95-clamping piece; 96-push rod two; 97-Gear 2; 98-Storage slot; 10-Spring 1. DETAILED DESCRIPTION

[0035] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0036] like Figure 1-Figure 14 As shown, a clamp for a battery includes a base plate 1 and a side plate 2 arranged on the base plate 1, and a limiting plate 4 is arranged on the top of the side plate 2, and a movable pushing portion 3 is arranged on the base plate 1, and the pushing portion 3 is adapted to the groove at the bottom of the battery 81, and there is a space between the pushing portion 3 and the limiting plate 4 for placing the battery 81, and a limiting component for limiting the tilting of the battery 81 is arranged between the pushing portion 3 and the limiting plate 4 on the side plate 2.

[0037] Therefore, in actual use, the push portion 3 can be movable so as to adapt to batteries 81 of different heights.

[0038] The moving structure of the pushing part 3 is as follows: first, the bottom plate 1 is provided with a moving groove 11 , and the bottom of the pushing part 3 is located in the moving groove 11 and a spring 10 is provided between the moving groove 11 .

[0039] Therefore, in actual use, the pushing part 3 moves in the movable groove 11 and is retracted and extended by the spring 10, and the diameters of the upper and lower ends of the movable groove 11 are different, that is, the diameter of the upper end is smaller, and a convex edge 31 is provided on the outer side of the bottom of the pushing part 3. The convex edge 31 cooperates with the diameter of the upper end to prevent the pushing part 3 from detaching from the bottom plate 1. At the same time, in order to facilitate the installation of the pushing part 3, the bottom plate 1 is divided into an upper and lower plate.

[0040] Secondly, a movable limiting member 5 is provided on the limiting plate 4, and an arc groove 41 is opened on the side of the limiting plate 4 away from the side plate 2, and a limiting hole 51 is provided on the limiting member 5, and the aperture of the limiting hole 51 is equal to the diameter of the connection between the connecting column 82 and the battery 81, and the center of the limiting hole 51 is located on the axis of the pushing part 3.

[0041] Therefore, in actual use, due to the setting of the limiting hole 51, the aperture of the limiting hole 51 is equal to the diameter of the connection between the connecting column 82 and the battery 81, that is, the bottom diameter of the connecting portion 822, and the center of the limiting hole 51 is located on the axis of the pushing portion 3, that is, on the axis of the battery 81, thereby ensuring that the connecting column 82 and the battery 81 are coaxial.

[0042] In order to avoid interference between the stopper 5 and the connecting column 82, the following configuration is provided, such as Fig.12 As shown, the stopper 5 is rotatably arranged on the stopper plate 4, and the stopper 5 is provided with a hole 52 on one side of the stopper hole 51 to avoid interference with the connecting column. The rotation of the stopper 5 adopts an axial hole structure, that is, the stopper 5 and the stopper plate 4 are both provided with blocks, and an axial hole structure is provided between the blocks.

[0043] Or Fig.13 As shown, the limiting member 1 5 includes a rotating plate 1 53 and a rotating plate 2 54, and the rotating plate 1 53 and the rotating plate 2 54 are assembled to form a limiting hole 51. The rotation of the rotating plate 1 53 and the rotating plate 2 54 adopts a shaft hole structure.

[0044] like Figure 1 As shown, the structure of the limiting assembly is: first, the limiting assembly includes a limiting block 61 and a limiting member 62, and the limiting block 61 is provided with an arc groove 611 on the side away from the side plate 2, and the arc groove 611 is in contact with the outer side of the battery 81, and the center of the arc groove 611 is located on the axis of the pushing portion 3, and the limiting member 62 is rotatably arranged on one side of the side plate 2, and there is a space between the arc groove 611 and the limiting member 62 for placing the battery 81.

[0045] Therefore, in actual use, the two sides of the battery 81 are limited by the adaptation of the second arc groove 611 and the second limiting member 62, thereby ensuring that the battery 81 will not tilt.

[0046] The structure of the second limiting member 62 is as follows: first, the second limiting member 62 includes a mounting plate 621, and a rotatable swing rod 622 is provided on the mounting plate 621, and an abutment portion 623 is provided at one end of the swing rod 622, and the abutment portion 623 is brought into contact with the battery 81 by rotating the swing rod 622.

[0047] In addition, a hand-held portion 624 is provided on the side of the rocker arm 622 away from the abutment portion 623. The rocker arm 622 is driven to rotate by pushing the hand-held portion 624. The rotation of the rocker arm 622 adopts an axial hole structure, and the axial hole structure is adopted between the rocker arm 622 and the side plate provided on the mounting plate 621.

[0048] At the same time, in order to achieve a better limiting effect, a placement groove 12 is opened at the bottom of the bottom plate 1 corresponding to the bottom of the battery 81, and the pushing part 3 is located in the placement groove 12.

[0049] Therefore, in actual use, the bottom of the battery 81 is limited by the placement groove 12.

[0050] like Figure 7 and Figure 8 As shown, in order to adapt to the heights of different batteries 81 , the side plate 2 is designed to include a fixed portion 21 and a movable portion 22 , and the bottom of the movable portion 22 is movably disposed in the fixed portion 21 , and a limiting plate 4 is disposed on the movable portion 22 .

[0051] Meanwhile, the second limiting member 62 is rotatably disposed on the mounting block 63 , and the mounting block 63 is provided with a protrusion 631 on one side close to the side plate 2 , and the fixing portion 21 and the moving portion 22 are both provided with a plurality of limiting grooves 23 .

[0052] Therefore, in actual use, the height can be further adjusted by setting the movable part 22, thereby making the adaptation range larger. Moreover, there is a limit structure between the movable part 22 and the fixed part 21, so as to prevent the battery 81 from being pushed open by the elasticity of the spring 10. At the same time, the specific structure is that a positioning bead 24 is arranged on the outside of the movable part 22, and a connecting groove 25 is opened on the fixed part 21 corresponding to the positioning bead 24.

[0053] The positioning ball 24 is also called a ball plunger or a spring plunger, and is a load device composed of a housing, a spring, a ball or a column.

[0054] like Figure 9-11 As shown, in order to adapt to the diameters of different batteries 81, the limiting assembly can be designed, for example, the limiting assembly includes a rotatable clamping member 66, and the clamping members 66 are two and symmetrically arranged, and a spring 2 is arranged between the clamping member 66 and the side plate 2. The spring 2 is not shown in the figure, and its approximate position is between the inner side of the clamping member 66 and the front side of the side plate 2. In order to better fit the battery 81, a curved surface can be formed on the inner side of the clamping member 66.

[0055] Alternatively, the limiting assembly includes a movable clamping member 2 67 and a clamping member 3 68, and there is a space between the clamping member 2 67 and the clamping member 3 68 for placing the battery 81, and a rack 69 is provided on one side of the clamping member 2 67 and the clamping member 3 68, and a gear 1 60 is provided between the clamping member 2 67 and the clamping member 3 68, and the gear 1 60 is meshed with the rack 69.

[0056] Therefore, in actual use, the second clamping member 67 is moved to synchronously drive the third clamping member 68 to move. Moreover, since the two clamping members are synchronously and symmetrically arranged, the moving distance is the same, thereby avoiding the situation where the distances between the two sides and the battery 81 are different and thus do not contact. At the same time, in order to better fit the battery 81, an arc surface can be formed on the inner side of the second clamping member 67 and the third clamping member 68.

[0057] Moreover, the side panel 2 is divided into front and rear panels to facilitate the installation of components such as the second clamp 67 and the third clamp 68, and the outer sides of the second clamp 67 and the third clamp 68 can be set to be flush with the outer side of the side panel 2, thereby making the surface smooth and reducing protrusions.

[0058] like Figure 6-Figure 7 and Figure 12-13 As shown, inspection is required after welding, so for convenience, the inspection is carried out directly on the fixture, so that the next step can be carried out directly after the fixture is removed.

[0059] The specific structure is as follows: first, a rotatable brush 71 is provided on the limit plate 4, and a marker is stained on the brush 71. When the brush 71 rotates to a specified position, the battery 81 is rotated to see whether the outer side surfaces of the welded connecting columns 82 are stained with markers.

[0060] Therefore, in actual use, a brush 71 with a marker, such as powder, is provided, and the battery 81 is rotated to check whether the outer side surfaces of the welded connecting posts 82 are all stained with the marker, thereby checking whether they are coaxial after welding.

[0061] The designated position is achieved by limiting the first column 72, that is, when the brush 71 contacts the first column 72, it indicates that the position is reached. At the same time, a limiting column 73 is also provided to limit the brush 71 that is not at the designated position.

[0062] The present invention also protects the welding process of the end of the battery 81, comprising the following steps: S1. Prepare the battery 81 and the connecting column 82 to be welded, and the connecting column 82 includes a column 821 and a connecting portion 822, and the connecting portion is a truncated cone, and the angle between the inclined surfaces on both sides of the truncated cone is 80 degrees to 90 degrees. The angle between the inclined surfaces on both sides of the truncated cone is 80 degrees to 90 degrees, so that after the connecting portion 822 and the battery 81 are welded, the connection is more stable and is not easy to break during later use.

[0063] S2. Place the battery 81 on the fixture as shown in any of the above items. At this time, the battery 81 is located between the limiting plate 4 and the pushing part 3, and the limiting hole 51 of the limiting member 5 is located above the battery 81. Then place the connecting column 82 on the battery 81, and place the bottom of the round table in the limiting hole 51. After correct placement, move the limiting member 5 to a position that does not affect welding.

[0064] S3. Press the switch of the laser welding machine, and then the battery 81 and the fixture rotate synchronously and start welding.

[0065] S4. After welding is completed, inspect the welding quality.

[0066] The laser welding machine is provided with a rotating cylinder to drive the battery 81 to rotate, and a synchronously rotating mounting frame 9 is provided on the rotating cylinder, that is, the mounting frame 9 is sleeved on the rotating cylinder, and a storage groove 98 is opened corresponding to the rotating cylinder, and the base plate 1 is detachably arranged on the mounting frame 9 and rotates synchronously with the mounting frame 9.

[0067] Therefore, in actual use, the fixture can be easily replaced and repaired by the detachable connection of the base plate 1. Moreover, the mounting frame 9 is divided into an upper and lower plate, thereby facilitating the installation of internal parts.

[0068] At the same time, the detachable structure is diverse. The mounting frame 9 may be provided with a rotatable hook 91 and a movable push rod 92, and one end of the push rod 92 is located outside the mounting frame 9, and the other end of the push rod 92 contacts the hook 91 to push the hook 91 to rotate, and the bottom of the hook 91 is located inside the mounting frame 9, and a spring 93 is provided between the hook 91 and the mounting frame 9 on the side away from the push rod 92, and the top of the hook 91 passes through the mounting frame 9 and is exposed, and a mounting groove 13 is provided at the bottom of the base plate 1, and a card groove 14 is provided on the inner wall of the mounting groove 13 corresponding to the hook 91.

[0069] Therefore, in actual use, the top of the hook 91 is adapted to the slot 14 to achieve installation and connection, and the hook 91 is driven to rotate by pushing the push rod 1 92, so that the top of the hook 91 is separated from the slot 14, and then the bottom plate 1 and the mounting frame 9 can be separated. And it can be reset by the elasticity of the spring 3 93.

[0070] The structure between the hook 91 and the push rod 1 92 is as follows: first, the push rod 1 92 is provided with a push fastener 921 at one end close to the hook 91, and the hook 91 is provided with an arc groove 3 911 corresponding to the push fastener 921. Therefore, in actual use, the push fastener 921 and the arc groove 3 911 are adapted to each other, that is, the contact surface is an arc surface, thereby increasing the contact area, and also avoiding interference between the hook 91 and the push rod 1 92 when rotating.

[0071] Moreover, rotating shafts 912 are provided on both sides of the hook 91 to realize rotation, and the hook 91 is provided with mounting posts 913 corresponding to the spring 10, and the spring 10 is sleeved on the outside of the mounting posts 913, thereby realizing the installation of the spring 10.

[0072] Alternatively, the detachable structure is: first, the mounting frame 9 is provided with a rotatable clamping member 4 94 and a clamping member 5 95 and a movable push rod 2 96, and the clamping member 4 94 and the clamping member 5 95 are located in the mounting frame 9, and a gear 2 97 is provided at one end of the clamping member 4 94 and the clamping member 5 95, and a plurality of teeth are provided on both sides of the push rod 2 96 corresponding to the gear 2 97, and a column 15 is provided at the bottom of the base plate 1, and the column 15 can be inserted into the mounting frame 9.

[0073] Therefore, in actual use, the installation and connection are achieved by closing the clamping member 4 94 and the clamping member 5 95 and clamping them on both sides of the column 15, and by moving the push rod 2 96, the clamping member 4 94 and the clamping member 5 95 are driven to open, so that the base plate 1 and the mounting frame 9 can be separated, and the clamping member 4 94 and the clamping member 5 95 can be closed by moving the push rod 2 96 again.

[0074] A block and a groove are provided between the clamping member 4 94 and the clamping member 5 95 to ensure the stability of clamping.

[0075] The above shows and describes the basic principle and main features of the present invention and the advantages of the present invention. At the same time, the present invention is not limited by the above embodiments, so without departing from the principle and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A clamp for a battery, characterized in that: The battery (81) comprises a bottom plate (1) and a side plate (2) arranged on the bottom plate (1), wherein a limit plate (4) is arranged on the top of the side plate (2), a movable pushing portion (3) is arranged on the bottom plate (1), and the pushing portion (3) is matched with a groove at the bottom of the battery (81), and a space for placing the battery (81) is provided between the pushing portion (3) and the limit plate (4), and a limit assembly for limiting the tilting of the battery (81) is provided between the pushing portion (3) and the limit plate (4) of the side plate (2); The limiting plate (4) is provided with a movable limiting member (5), and the limiting plate (4) is provided with an arc-shaped groove (41) on a side away from the side plate (2), and the limiting member (5) is provided with a limiting hole (51), and the hole diameter of the limiting hole (51) is equal to the diameter of the connection point between the connecting column (82) and the battery (81), and the center of the limiting hole (51) is located on the axis of the pushing part (3).

2. A battery clamp according to claim 1, characterized in that: The bottom plate (1) is provided with a movable groove (11), and the bottom of the pushing portion (3) is located in the movable groove (11), and a spring 1 (10) is provided between the pushing portion and the movable groove (11).

3. A battery clamp according to claim 1, characterized in that: The limiting member 1 (5) is rotatably arranged on the limiting plate (4), and the limiting member 1 (5) is provided with a hole (52) on one side of the limiting hole (51) for avoiding interference with the connecting column; Alternatively, the limiting member 1 (5) comprises a rotating plate 1 (53) and a rotating plate 2 (54), and the rotating plate 1 (53) and the rotating plate 2 (54) are assembled to form a limiting hole (51).

4. A battery clamp according to any one of claims 1 to 3, characterized in that: The limiting assembly comprises a limiting block (61) and a second limiting member (62), and the limiting block (61) is provided with a second arc groove (611) on a side away from the side plate (2), and the second arc groove (611) is in contact with the outer side of the battery (81), and the center of the second arc groove (611) is located on the axis of the pushing portion (3), and the second limiting member (62) is rotatably arranged on one side of the side plate (2), and a space for placing the battery (81) is provided between the second arc groove (611) and the second limiting member (62).

5. A battery clamp according to claim 4, characterized in that: The second limiting member (62) comprises a mounting plate (621), and a rotatable swing rod (622) is provided on the mounting plate (621), and an abutment portion (623) is provided at one end of the swing rod (622), and the abutment portion (623) is brought into contact with the battery (81) by rotating the swing rod (622); Or / and, the bottom plate (1) is provided with a placement groove (12) corresponding to the bottom of the battery (81), and the pushing portion (3) is located in the placement groove (12).

6. A battery clamp according to claim 4, characterized in that: The side plate (2) comprises a fixed portion (21) and a movable portion (22), wherein the bottom of the movable portion (22) is movably arranged in the fixed portion (21), and a limiting plate (4) is arranged on the movable portion (22); The second limiting member (62) is rotatably mounted on the mounting block (63), and the mounting block (63) is provided with a protrusion (631) on a side close to the side plate (2), and the fixed portion (21) and the movable portion (22) are both provided with a plurality of limiting grooves (23).

7. A battery clamp according to any one of claims 1 to 3, characterized in that: The limiting assembly comprises a rotatable clamping member 1 (66), wherein the clamping members 1 (66) are two and symmetrically arranged, and a spring 2 is arranged between the clamping member 1 (66) and the side plate (2); Alternatively, the limit assembly includes a movable clamping member 2 (67) and a clamping member 3 (68), and a space for placing the battery (81) is provided between the clamping member 2 (67) and the clamping member 3 (68), a rack (69) is provided on one side of the clamping member 2 (67) and the clamping member 3 (68), and a gear 1 (60) is provided between the clamping member 2 (67) and the clamping member 3 (68), and the gear 1 (60) and the rack (69) are meshed with each other, so that the clamping member 3 (68) is synchronously driven to move by moving the clamping member 2 (67).

8. A battery clamp according to any one of claims 1 to 3, characterized in that: The limit plate (4) is provided with a rotatable brush (71) with a marker on it. When the brush (71) is rotated to a specified position, the battery (81) is rotated to see whether the outer side surfaces of the welded connecting columns (82) are all stained with the marker.

9. A welding process for battery ends, characterized in that: The following steps are involved: S1. Prepare the battery (81) and the connecting column (82) to be welded, wherein the connecting column (82) includes a column (821) and a connecting portion (822), and the connecting portion is a frustum, and the angle between the inclined surfaces on both sides of the frustum is 80 degrees to 90 degrees; S2. Place the battery (81) on the fixture as described in any one of claims 1 to 8, wherein the battery (81) is located between the limiting plate (4) and the pushing portion (3), and the limiting hole (51) of the limiting member 1 (5) is located above the battery (81). Then place the connecting column (82) on the battery (81), and place the bottom of the truncated table in the limiting hole (51). After the placement is correct, move the limiting member 1 (5) to a position that does not affect welding. S3, pressing the switch of the laser welding machine, at which time the battery (81) and the fixture rotate synchronously and start welding; S4. After welding is completed, inspect the welding quality.

10. The battery end welding process according to claim 9, characterized in that: The laser welding machine is provided with a rotating cylinder, and a synchronously rotating mounting frame (9) is provided on the rotating cylinder, and the bottom plate (1) is detachably mounted on the mounting frame (9) and rotates synchronously with the mounting frame (9); The mounting frame (9) is provided with a rotatable hook (91) and a movable push rod (92), one end of the push rod (92) is located outside the mounting frame (9), and the other end of the push rod (92) contacts the hook (91) so as to push the hook (91) to rotate, the bottom of the hook (91) is located inside the mounting frame (9), and a spring (93) is provided between the side of the hook (91) away from the push rod (92) and the mounting frame (9), and the top of the hook (91) passes through the mounting frame (9) to be exposed, the bottom of the bottom plate (1) is provided with a mounting groove (13), and the inner wall of the mounting groove (13) is provided with a clamping groove (14) corresponding to the hook (91); Alternatively, the mounting frame (9) is provided with a rotatable clamping member 4 (94) and a clamping member 5 (95) and a movable push rod 2 (96), and the clamping member 4 (94) and the clamping member 5 (95) are located in the mounting frame (9), and a gear 2 (97) is provided at one end of the clamping member 4 (94) and the clamping member 5 (95), and a plurality of teeth are provided on both sides of the push rod 2 (96) corresponding to the gear 2 (97), and a column (15) is provided at the bottom of the base plate (1), and the column (15) can be inserted into the mounting frame (9), and the clamping member 4 (94) and the clamping member 5 (95) are driven to open or close by moving the push rod 2 (96).

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