Solder strip clamping mechanism

Abstract

The invention discloses a welding strip clamping mechanism which comprises a first clamping unit located on the upper side of a battery piece and a second clamping unit located on the lower side of the battery piece. The first clamping unit comprises a base plate and a driving structure installed on the base plate. The driving structure comprises a driving part I, a driving part II and a driving part III; the first clamping unit further comprises a first sliding piece, a second sliding piece, a first clamping piece and a second clamping piece. The two sides of the first sliding piece are fixedly connected with a first driving piece and a first clamping piece correspondingly. The two sides of the second sliding piece are fixedly connected with a second driving piece and a second clamping piece correspondingly. The second clamping unit comprises a guide groove plate. The power mechanism, the moving part, the first turning assembly and the second turning assembly are arranged on the lower side of the guide groove plate; one end of the moving part is fixedly connected with the power mechanism, and the other end is slidably connected with the turning assembly I and the turning assembly II; the second clamping unit further comprises a third clamping piece and a fourth clamping piece. The third clamping piece and the fourth clamping piece are fixedly connected with the second direction changing assembly and the first direction changing assembly respectively.

Description

Technical Field

[0001] The invention relates to the field of clamping, and in particular to a welding strip clamping mechanism. Background Art

[0002] In order to achieve a more efficient and lower-cost solar photovoltaic module manufacturing process, the cost is reduced by reducing the amount of material used by reducing the screen-printed silver paste on the grid lines of the cells and using thinner solder strips. The solder strips used to connect the cells are becoming more and more dense, and the grid lines of the cells are becoming thinner and thinner.

[0003] The current solder ribbon clamping mechanism opens the two side clamps almost synchronously to place the solder ribbon. The accompanying problem is that the solder ribbon is easy to jump or be moved by the opening of the clamps during the process of pulling, straightening and placing the solder ribbon by the stringer. It is easy to cause the solder ribbon to deviate slightly during the placement process, causing defects in the components, reduced power, or even scrapped.

[0004] Moreover, on the lower side of the battery cell, the action range of the clamping jaws is relatively large when they are opened, so the soldering ribbon is easily deviated, causing the soldering ribbon to deviate or fail to enter the clamping range, resulting in a lower soldering yield. For this reason, the present invention provides a soldering ribbon clamping mechanism. Summary of the invention

[0005] The object of the present invention is to provide a solder strip clamping mechanism to solve the problem of solder strip deviation mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A solder strip clamping mechanism, comprising a clamping unit 1 located on the upper side of a battery cell and a clamping unit 2 located on the lower side of the battery cell; The clamping unit 1 includes a substrate and a driving structure installed on the substrate; the driving structure includes a driving member 1, a driving member 2 and a driving member 3; the driving member 3 is located in the middle of a pair of driving members 1 and is movably abutted with the driving member 1; the clamping unit 1 also includes a sliding member 1, a sliding member 2, a clamping member 1 and a clamping member 2; the sliding member 1 and the sliding member 2 are both slidably connected to the side of the substrate in the length direction; the two sides of the sliding member 1 are respectively fixedly connected to the driving member 1 and the clamping member 1; the two sides of the sliding member 2 are respectively fixedly connected to the driving member 2 and the clamping member 2; The clamping unit 2 includes a guide groove plate; a power mechanism, a moving part, a direction-changing component 1 and a direction-changing component 2 arranged on the lower side of the guide groove plate; a plurality of guide grooves are opened on the upper side of the guide groove plate; the power mechanism is used for double-stroke driving; one end of the moving part is fixedly connected to the power mechanism, and the other end is slidably connected to the direction-changing component 1 and the direction-changing component 2 respectively; the clamping unit 2 also includes a clamping part 3 and a clamping part 4; the clamping part 3 and the clamping part 4 are arranged at the end of the guide groove plate along the width direction; the clamping part 3 and the clamping part 4 are fixedly connected to the direction-changing component 2 and the direction-changing component 1 respectively.

[0007] Preferably, the clamping member 1 includes a plurality of movable claws, a connecting plate and a plurality of adjusting springs; a plurality of spaced grooves 1 are provided on a side of the connecting plate away from the sliding member 1; the movable claw is rotatably connected to a side wall on a lower side of the groove and extends to a lower side of the connecting plate; the adjusting spring is arranged on an upper side of the groove 1, and two ends of the adjusting spring are respectively fixedly connected to the movable claw and the side wall on the opposite side of the groove 1.

[0008] Preferably, the second clamping member includes a plurality of fixed claws spaced apart from the movable claws; the fixed claws pass through the connecting plate and are fixedly connected to the protruding portions provided on the side surfaces of the second sliding member.

[0009] Preferably, the sliding member 1 includes a plurality of sliders 1 and a slide plate 1; the slider 1 is slidably connected to the side of the substrate along the length direction; the slider 1 is fixedly connected to the opposite side of the slide plate 1; and the side wall of the slide plate 1 away from the slider 1 is fixedly connected to the connecting plate.

[0010] Preferably, sliding member 2 includes slider 2 and slide plate 2; slider 2 is slidably connected to the side of the substrate along the length direction; slider 2 is fixedly connected to the opposite side of slide plate 2; slide plate 2 further protrudes away from the side wall of slider 2, and the protruding portion is fixedly connected to the fixed claw; the upper sides of slide plates 1 and 2 extend toward the directions of driving member 1 and driving member 2, respectively, so as to be fixedly connected to driving member 1 and driving member 2, respectively.

[0011] Preferably, the clamping member three includes a clamping plate and a plurality of tail clamping claws, the side of the clamping plate away from the moving member is fixedly connected to the plurality of evenly distributed tail clamping claws, and the lower side of the clamping plate is fixedly connected to the change-of-direction component two.

[0012] Preferably, the clamping member four includes a clamping rod and a plurality of elastic claws located on the lower side of the clamping plate, wherein the plurality of elastic claws are fixedly connected to the clamping rod and extend upward between adjacent tail clamping claws; the clamping rod is fixedly connected to the change-of-direction component one; and the elastic claws are made of elastic material at least at the portion used for clamping.

[0013] Preferably, the moving part includes a changing plate and a pair of fixed parts; the changing plate is fixedly connected to the power mechanism; the end of the changing plate close to the power mechanism extends to both sides, and the extended part is slidably connected to a pair of fixed parts; the fixed part is fixedly connected to the lower side of the guide groove plate; a pair of changing grooves are opened in the middle of the moving part; a pair of changing grooves are opened in the changing plate; the changing grooves extend toward the end close to the power mechanism, and also tilt toward both sides of the changing plate to form a groove with an arc path.

[0014] Preferably, the direction-changing component 1 includes a pair of direction-changing members 1; the direction-changing component 2 includes a pair of direction-changing members 2; the pair of direction-changing members 1 and the pair of direction-changing members 2 are arranged at intervals; the direction-changing members 1 and 2 adjacent to each other in the middle extend to the upper side of the direction-changing groove; the extended parts of the direction-changing members 1 and 2 are fixedly connected with bolts; and the bolts are placed in the direction-changing groove.

[0015] Preferably, a sliding rod is fixedly connected to the lower side of the guide groove plate, and a pair of direction-changing members 1 and a pair of direction-changing members 2 are both slidably connected to the sliding rod; a side of each direction-changing member 1 away from the direction-changing groove is fixedly connected to a clamping rod; and the upper side of each direction-changing member 2 protrudes upward and is fixedly connected to the clamping plate.

[0016] Compared with the prior art, the invention has the following beneficial effects: the invention uses the driving member 1 and the driving member 2 in the clamping unit 1 as the driving members of the movable claw and the fixed claw, so that the movable claw and the fixed claw are fully opened twice when opening the welding strip, and the welding strip is precisely controlled. In this way, the welding accuracy is improved, and the grid lines on the welding strip and the battery cell can be completely overlapped, thereby improving the welding yield.

[0017] In the clamping unit 2, a double-stroke power mechanism is used as the drive of the tail clamp and the elastic claw, so that the tail clamp and the elastic claw can be opened twice when opening the welding strip, that is, first open a part, and then open completely. It ensures that the welding strip can be pulled out after being straightened. After all are opened, it can ensure that the next welding strip can be pulled smoothly. It avoids the problem of jumping and driving during the process of pulling, straightening and placing the welding strip, which causes the deviation of the welding strip line.

[0018] The direction of the linear motion can be changed to lateral movement by using the direction-changing groove in the direction-changing plate, thereby driving the clamping plate and the tail clamping claw as well as the clamping rod and the elastic claw to move toward or in the opposite direction to clamp or open the welding strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the clamping unit 1 and the clamping unit 2 of the present invention; Figure 2 A top view of a clamping unit of the present invention; Figure 3 This is a schematic diagram of the overall structure of a clamping unit of the present invention; Figure 4 For the present invention Figure 3 The enlarged view of the structure of the clamping part 1 and the clamping part 2 at A in the middle; Figure 5 This is a disassembled diagram of the movable claw, connecting plate and fixed claw structure of the present invention; Figure 6 This is a disassembled diagram of the structure of the sliding member 1, the sliding member 2 and the substrate of the present invention; Figure 7 It is a schematic diagram of the structure of the slide plate 1, slide plate 2 and clamping member 2 of the present invention; Figure 8 This is a cross-sectional view of the structure of the connection between the slide plate 1, the slide plate 2, the clamping member 1 and the clamping member 2 of the present invention; Fig. 9 It is a side view of the slide plate 1, slide plate 2, clamping member 1 and clamping member 2 of the present invention (observed from the direction of slide plate 2); Fig.10 This is a disassembled diagram of the structure of the clamping member 1 and the clamping member 2 of the present invention; Fig.11 This is a disassembled view of the structure of the slide plate 1 and the slide plate 2 of the present invention (observed from the direction of the fixed plate 1); Fig.12 This is a schematic diagram of the structure of the connection between the slide plate 1 and the slide plate 2 of the present invention; Fig.13 This is a schematic diagram of the structure of the connection between the slide plate 1, the slide plate 2 and the base plate of the present invention; Fig.14 It is a structural schematic diagram of the elastic member of the present invention; Fig.15 It is a schematic diagram of the second structure of the clamping unit of the present invention; Fig.16 It is a bottom view of the second structure of the clamping unit of the present invention; Fig.17 This is a disassembled diagram of the clamping part three and the clamping part four structures of the present invention; Fig.18 This is a disassembled diagram of two structures of the clamping unit of the present invention; Fig.19 It is a schematic diagram of the structure of the connection between the power mechanism and the moving part of the present invention; Fig. 20 It is a structural schematic diagram of the direction-changing plate, the power mechanism and the direction-changing assembly of the present invention; Fig.21 It is a structural schematic diagram of the deflection plate of the present invention; Fig. 22 This is a structural disassembly diagram of the first and second direction-changing components of the present invention; Fig.23 It is a schematic diagram of the structure of the connection between the first direction-changing member and the fourth clamping member of the present invention; Fig.24 It is a cross-sectional view of the structure of the connection between the second direction-changing member and the third clamping member of the present invention.

[0020] In the figure: 1 base plate, 2 driving structure, 21 driving member 1, 211 connecting rod assembly 1, 22 driving member 2, 221 connecting rod assembly 2, 23 driving member 3, 6 sliding member 1, 61 sliding member 1, 62 sliding member 1, 7 sliding member 2, 71 sliding member 2, 72 sliding member 2, 312 fixed block, 41 clamping member 1, 411 movable claw, 412 connecting plate, 413 adjusting spring, 42 clamping member 2, 421 fixed claw, 5 elastic member, 60 clamping unit one, 70 clamping unit two, 54 changing component one, 55 changing component two, 701 guide groove plate, 711 guide groove, 73 power mechanism, 74 moving part, 83 clamping part three, 831 clamping plate, 832 tail clamping claw, 833 clamping groove, 84 clamping part four, 841 clamping rod, 842 elastic claw, 91 changing plate, 91 changing groove, 92 fixing part, 93 sliding rod, 94 changing component one, 95 changing component two. DETAILED DESCRIPTION

[0021] Embodiment 1:

[0022] See also Figure 1-Figure 24 The present invention provides a technical solution: Figure 1 As shown, a solder strip clamping mechanism includes a clamping unit 1 60 for clamping the solder strip on the upper side of the battery cell and a clamping unit 2 70 for clamping the solder strip on the lower side of the battery cell, which are used to clamp the solder strip to overlap with the grid line on the battery cell.

[0023] The clamping unit 1 60 includes a base plate 1 and a driving structure 2 mounted on the base plate 1 .

[0024] The driving structure 2 includes a driving member 1 21, a driving member 22 and a driving member 3 23. The driving member 3 23 is located between the driving member 1 21 and the driving member 2 22, and the driving end of the driving member 3 23 is in active contact with the driving end of the driving member 1 21.

[0025] The clamping unit 1 60 further includes a sliding member 1 6 , a sliding member 2 7 , a clamping member 1 41 and a clamping member 2 42 . The sliding member 1 6 and the sliding member 2 7 are slidably connected to the side edge of the substrate 1 .

[0026] The driving member 21 includes a cylinder 1 and a connecting rod assembly 211. The cylinder 1 is fixedly connected to one end of the connecting rod assembly 211. The other end of the connecting rod assembly 211 is fixedly connected to one side of the sliding member 6.

[0027] The second driving member 22 comprises a second cylinder and a second connecting rod assembly 221. The second cylinder is fixedly connected to one end of the second connecting rod assembly 221. The other end of the second connecting rod assembly 221 is fixedly connected to one side of the second sliding member 7.

[0028] The other sides of the sliding member 1 6 and the sliding member 2 7 are fixedly connected to the clamping member 1 41 and the clamping member 2 42 respectively, and are used to drive the clamping member 1 41 and the clamping member 2 42 to move respectively to clamp or release the welding strip.

[0029] like Figure 2-Figure 6 As shown, the clamping member 1 41 includes a plurality of movable claws 411, a connecting plate 412 and a plurality of adjusting springs 413. A plurality of grooves 1 arranged at intervals are provided on the side of the connecting plate 412 away from the sliding member 1 6. The movable claw 411 is rotatably connected to the side wall on the lower side of the groove and extends to the lower side of the connecting plate 412. The adjusting spring 413 is arranged in the upper side of the groove 1, and the two ends of the adjusting spring 413 are respectively fixedly connected to the movable claw 411 and the side wall on the opposite side of the groove 1.

[0030] The second clamping member 42 includes a plurality of fixed claws 421 spaced apart from the movable claws 411 . The tops of the fixed claws 421 extend through the connecting plate 412 toward the sliding member 7 and are fixedly connected to the raised portions on the side of the sliding member 7 . The fixed claws 421 are located at the lower side of the connecting plate 412 .

[0031] like Figure 5-Figure 12 As shown, the sliding member 6 includes a plurality of sliders 61 and a slide plate 62. The slider 61 is slidably connected to the side edge of the base plate 1 along the length direction, and the slider 61 is fixedly connected to the opposite side of the slide plate 62. The side wall of the slide plate 62 away from the slider 61 is fixedly connected to the connecting plate 412. The upper side of the slide plate 62 extends toward the connecting rod assembly 211 and is fixedly connected to the connecting rod assembly 211.

[0032] The sliding member 2 7 includes a slider 2 71 and a slide plate 2 72; the slider 2 71 is slidably connected to the side of the substrate 1 along the length direction, and the slider 2 71 is fixedly connected to the opposite side of the slide plate 2 72; the slide plate 2 72 further protrudes away from the side wall of the slider 2 71, and the protruding part of the slide plate 2 72 is fixedly connected to the fixed claw 421. The upper side of the slide plate 2 72 extends toward the connecting rod assembly 2 221 and is fixedly connected to the connecting rod assembly 221. There is a distance between the slide plate 1 62 and the slide plate 2 72, which facilitates the slide plate 1 62 to drive the clamping member 1 41 or the slide plate 2 72 to drive the clamping member 2 42 to move. The slider 1 61 and the slider 2 71 are preferably two, and the slider 1 61 and the slider 2 71 can be the same structure for sliding.

[0033] like Fig.14 As shown, a fixed block 312 protrudes from the middle of the upper side of the skateboard 1 62 toward the side of the driving member 3 23, and an elastic member 5 is arranged between the fixed block 312 and the side extending from the skateboard 2 72. The elastic member 5 is preferably a spring, and both ends of the elastic member 5 are respectively fixedly connected to the side extending from the skateboard 2 72 toward the fixed block 312 and the fixed block 312.

[0034] like Figure 15-18 As shown, the second clamping unit 70 includes a guide slot plate 701, a power mechanism 73, a moving member 74, a first direction-changing component 54 and a second direction-changing component 55. A plurality of guide slots 711 for the welding strip to pass through are provided on the upper side of the guide slot plate 701.

[0035] The power mechanism 73, the moving member 74, the direction changing assembly 1 54 and the direction changing assembly 2 55 are all arranged on the lower side of the guide groove plate 701. The power mechanism 73 can perform two-stroke driving, and the power mechanism 73 is preferably a cylinder.

[0036] The power mechanism 73 is fixedly connected to the guide groove plate 701, and the driving end of the power mechanism 73 is fixedly connected to the moving member 74; the moving member 74 is fixedly connected to the guide groove plate 701, and a pair of direction-changing grooves 911 are opened in the middle of the moving member 74; the direction-changing component 1 54 and the direction-changing component 2 55 are respectively slidably connected in the pair of direction-changing grooves 911.

[0037] The clamping unit 2 70 further includes a clamping member 3 83 and a clamping member 4 84. The clamping member 3 83 and the clamping member 4 84 are arranged at the ends of the guide groove plate 701 along the width direction, and are used to clamp the welding strip from the guide groove 711.

[0038] The second and first direction-changing components 55 and 54 are respectively fixedly connected to the third and fourth clamping members 83 and 84, and are used to drive the third and fourth clamping members 83 and 84 to move along the path of the direction-changing groove 911. The third and fourth clamping members 83 and 84 are cross-arranged and have a distance between them.

[0039] The clamping member 3 83 includes a clamping plate 831 and a plurality of tail clamping claws 832. The side of the clamping plate 831 away from the guide groove plate 701 is fixedly connected to the plurality of tail clamping claws 832. The plurality of tail clamping claws 832 are evenly distributed on the side of the clamping plate 831, and clamping grooves 833 are formed between adjacent tail clamping claws 832. The lower side of the clamping plate 831 is fixedly connected to the change-of-direction assembly 2 55.

[0040] The clamping member 84 includes a clamping rod 841 and a plurality of elastic claws 842. The clamping rod 841 is located at the lower side of the clamping plate 831. One end of the plurality of elastic claws 842 is evenly fixedly connected to the clamping rod 841, and the other end extends to the clamping groove 833. The elastic claws 842 are made of elastic material at least at the portion extending to the clamping groove 833, and can be slightly elastically deformed during clamping to eliminate the error of part processing and clamp the welding strip. The clamping rod 841 is fixedly connected to the redirection component 54.

[0041] like Figure 18-Figure 21 As shown, the moving member 74 includes a deflection plate 91 and a pair of fixing members 92. A deflection groove 911 is provided on the deflection plate 91, and the end of the deflection plate 91 away from the deflection groove 911 is fixedly connected to the driving end of the power mechanism 73; the end of the deflection plate 91 close to the power mechanism 73 extends to both sides for sliding connection with the pair of fixing members 92. The fixing member 92 is fixedly connected to the lower side of the guide groove plate 701.

[0042] like Figure 21-24 As shown, the direction-changing component 1 54 includes a pair of direction-changing members 1 94. The direction-changing component 2 55 includes a pair of direction-changing members 2 95. The pair of direction-changing members 1 94 and the pair of direction-changing members 2 95 are arranged at intervals, and the adjacent direction-changing members 1 94 and the direction-changing members 2 95 located in the middle are further extended near the side of the direction-changing groove 911 until they extend to the upper side of the direction-changing groove 911; the extended parts of the direction-changing members 1 94 and the direction-changing members 2 95 are fixedly connected with bolts. The bolts are placed in the direction-changing groove 911 for sliding in the direction-changing groove 911. The side of the pair of direction-changing members 1 94 away from the direction-changing groove 911 is fixedly connected to the side of the clamping rod 841 away from the elastic claw 842. The upper side of the pair of direction-changing members 2 95 protrudes upward and is fixedly connected to the lower side of the clamping plate 831.

[0043] A pair of redirecting grooves 911 extend toward the ends of the power mechanism 73 while also being inclined toward both sides of the redirecting plate 91 to form grooves with an arc path, which are used to drive the redirecting member 1 94 and the redirecting member 2 95 with extended portions to move laterally in the redirecting grooves 911 when the redirecting plate 91 moves.

[0044] The lower side of the guide groove plate 701 is fixedly connected with a sliding rod 93. The upper sides of a pair of direction-changing members 1 94 and a pair of direction-changing members 2 95 are both slidably connected with the sliding rod 93.

[0045] There is a distance between the adjacent changing pieces 1 94 and 2 95 , there is a distance between the side of the changing piece 2 95 away from the changing groove 911 and the clamping rod 841 , and there is a distance between the upper side of the changing piece 1 94 and the clamping plate 831 , so that the changing pieces 1 94 and 2 95 can move to clamp or open.

[0046] Working principle: Reference Figure 1-Figure 14 It should be noted that, in the following description, “right side” refers to the direction toward the driving member 1 21 , and “left side” refers to the direction toward the driving member 22 .

[0047] The operator starts the driving member 1 21 and the driving member 2 22. The driving ends of the driving member 1 21 and the driving member 2 22 respectively drive the connecting rod assembly 1 211 and the connecting rod assembly 2 221 to move toward each other.

[0048] That is, the connecting rod assembly 221 drives the slider 2 71, the slide plate 2 72 and the fixed claw 421 to move; the connecting rod assembly 1 211 drives the slider 1 61, the slide plate 1 62, the connecting plate 412, the adjusting spring 413 and the movable claw 411 to move. In this way, the welding strip is clamped by the relative movement of the movable claw 411 and the fixed claw 421, and the welding strip is pulled out. When the welding strip needs to be placed on the battery cell, the driving member 1 21 and the driving member 2 22 are in a state of powerless output and no action under the control of the middle leakage battery valve (this is a conventional technical means, which will not be described in detail here), and the driving end of the driving member 3 23 moves toward the right driving member 1 21, pushing the driving end of the right driving member 1 21 to move. The driving end of the right driving member 1 21 drives the connecting rod assembly 1 211 and the corresponding movable claw 411 to move away from the left connecting rod assembly 2 21, increasing the distance between the movable claw 411 and the fixed claw 421, so as to open the clamping of the welding strip for the first time. When the welding tool is pressed down to press the welding strip onto the battery cell in preparation for welding, it is used to adjust the clamping position of the welding strip, so as to achieve precise control of the welding strip. During welding, if the width of the welding strip deviates, the lower end of the movable claw 411 will be pushed to rotate in the direction away from the welding strip, so that the upper end of the movable claw 411 will rotate in the direction of the adjustment spring 413. At the same time, the adjustment spring 413 will apply a reaction force to the upper end of the movable claw 411, so that the lower end of the movable claw 411 will rotate in the direction of the welding strip, so as to keep the welding strip clamped at all times and avoid the problem of offset when the clamped welding strip is welded.

[0049] Afterwards, the driving ends of the driving member 1 21 and the driving member 2 22 drive the connecting rod assembly 1 211 and the connecting rod assembly 2 221 and the corresponding movable claw 411 and the fixed claw 421 to move in the opposite direction. The movable claw 411 and the fixed claw 421 are opened, which is the second opening to prepare for the next clamping. The driving member 3 23 moves in the opposite direction to restore the state when the driving end of the driving member 3 23 is not pushed.

[0050] refer to Figure 1 and Figure 15-Figure 24, when the tail clamping claw 832 and the elastic claw 842 are in a fully opened state. At this time, the guide groove 711 and the clamping groove 833 are connected. The welding strip moves through the guide groove 711 into the clamping range of the tail clamping claw 832 and the elastic claw 842. When the tail of the welding strip passes through the tail clamping claw 832 and the elastic claw 842, the welding strip is clamped. First, the power mechanism 73 drives the turning plate 91 to move in a direction away from the power mechanism 73. During the movement, a pair of turning grooves 911 of the turning plate 91 force the adjacent turning pieces 1 94 and 2 95 to slide along the arc path of the turning grooves 911. During the sliding process, the distance between the adjacent turning pieces 1 94 and 2 95 gradually increases, thereby realizing the lateral movement of the turning pieces 1 94 and 2 95. At the same time, the first direction-changing member 94 drives the clamping rod 841 and the elastic claw 842 to move; the second direction-changing member 95 drives the clamping plate 831 and the tail clamping claw 832 to move, so that each pair of adjacent tail clamping claws 832 and elastic claws 842 gradually move closer to clamp the solder strip and straighten the solder strip. The solder strip is slightly deformed by plastic deformation. Due to the plastic deformation of the solder strip, the solder strip can remain straight without being pulled, so as to fit the grid line on the battery cell. Then, the clamping of the solder strip begins to loosen.

[0051] The process of loosening the welding strip is as follows: first, it is gradually loosened, that is, the power mechanism 73 moves in the first stroke. The first stroke is a short distance stroke. Specifically, the power mechanism 73 drives the turning plate 91 to move toward the direction close to the power mechanism 73. The corresponding turning member 1 94 drives the clamping member 4 84 and the clamping member 3 83 driven by the turning member 2 95 to move in the opposite direction, so that each pair of adjacent tail clamping claws 832 and elastic claws 842 gradually move away from each other to loosen the clamping of the welding strip. The opening movement path is opposite to the direction of the above-mentioned clamping movement path. At this time, the opening amplitude is small, and the welding strip is hardly driven to follow the movement, so that the welding strip can be pulled forward straight. After the welding strip is further pulled forward to leave the tail clamping claws 832 and the elastic claws 842, the power mechanism 73 drives the turning plate 91 to move further toward the power mechanism 73, which is the movement of the second stroke of the power mechanism 73. This allows the tail clamping claw 832 and the elastic claw 842 to be fully opened, so that the tail clamping claw 832 and the elastic claw 842 can be smoothly entered when the welding strip is fed next time, and the welding strip can be clamped again.

Claims

1. A welding strip clamping mechanism, characterized in that: It comprises a clamping unit 1 (60) located on the upper side of the battery cell and a clamping unit 2 (70) located on the lower side of the battery cell; The clamping unit 1 (60) comprises a substrate (1) and a driving structure (2) mounted on the substrate (1); the driving structure (2) comprises a driving member 1 (21), a driving member 2 (22) and a driving member 3 (23); the driving member 3 (23) is located in the middle of a pair of driving members 1 (21) and is movably abutted against the driving member 1 (21); the clamping unit 1 (60) further comprises a sliding member 1 (6), a sliding member 2 (7), a clamping member 1 (41) and a clamping member 2 (42); the sliding member 1 (6) and the sliding member 2 (7) are both slidably connected to the side edge of the substrate (1) in the length direction; the two sides of the sliding member 1 (6) are respectively fixedly connected to the driving member 1 (21) and the clamping member 1 (41); the two sides of the sliding member 2 (7) are respectively fixedly connected to the driving member 2 (22) and the clamping member 2 (42); The clamping unit 2 (70) comprises a guide groove plate (701); a power mechanism (73), a moving member (74), a direction-changing component 1 (54) and a direction-changing component 2 (55) arranged at the lower side of the guide groove plate (701); a plurality of guide grooves (711) are provided at the upper side of the guide groove plate (701); the power mechanism (73) is used for double-stroke driving; one end of the moving member (74) is fixedly connected to the power mechanism (73), and the other end is slidably connected to the direction-changing component 1 (54) and the direction-changing component 2 (55); the clamping unit 2 (70) further comprises a clamping member 3 (83) and a clamping member 4 (84); the clamping member 3 (83) and the clamping member 4 (84) are arranged at the end of the guide groove plate (701) along the width direction; the clamping member 3 (83) and the clamping member 4 (84) are fixedly connected to the direction-changing component 2 (55) and the direction-changing component 1 (54) respectively.

2. A solder strip clamping mechanism according to claim 1, characterized in that: The clamping member (41) comprises a plurality of movable claws (411), a connecting plate (412) and a plurality of adjusting springs (413); a plurality of grooves (411) arranged at intervals are formed on a side of the connecting plate (412) away from the sliding member (6); the movable claw (411) is rotatably connected to a side wall on a lower side of the groove and extends to the lower side of the connecting plate (412); the adjusting spring (413) is arranged in an upper side of the groove, and two ends of the adjusting spring (413) are respectively fixedly connected to the movable claw (411) and the side wall on the opposite side of the groove.

3. A solder strip clamping mechanism according to claim 2, characterized in that: The second clamping member (42) comprises a plurality of fixed claws (421) arranged at intervals with the movable claws (411); the fixed claws (421) pass through the connecting plate (412) and are fixedly connected to a protruding portion provided on the side of the second sliding member (7).

4. A solder strip clamping mechanism according to claim 3, characterized in that: The sliding member 1 (6) comprises a plurality of sliding blocks 1 (61) and a sliding plate 1 (62); the sliding block 1 (61) is slidably connected to the side edge of the base plate (1) along the length direction; the sliding block 1 (61) is fixedly connected to the opposite side of the sliding block 1 (62); and the side wall of the sliding plate 1 (62) away from the sliding block 1 (61) is fixedly connected to the connecting plate (412).

5. A solder strip clamping mechanism according to claim 4, characterized in that: The sliding member 2 (7) comprises a sliding block 2 (71) and a sliding plate 2 (72); the sliding block 2 (71) is slidably connected to the side edge of the base plate (1) along the length direction; the sliding block 2 (71) is fixedly connected to the opposite side of the sliding block 2 (72); the sliding plate 2 (72) further protrudes away from the side wall of the sliding block 2 (71), and the protruding portion is fixedly connected to the fixing claw (421); the upper sides of the sliding plates 1 (62) and 2 (72) extend toward the driving member 1 (21) and the driving member 2 (22) respectively, so as to be fixedly connected to the driving member 1 (21) and the driving member 2 (22) respectively.

6. A solder strip clamping mechanism according to claim 1, characterized in that: The clamping member 3 (83) comprises a clamping plate (831) and a plurality of tail clamping claws (832). The side of the clamping plate (831) away from the moving member (74) is fixedly connected to the plurality of evenly distributed tail clamping claws (832). The lower side of the clamping plate (831) is fixedly connected to the second direction-changing component (55).

7. A solder strip clamping mechanism according to claim 6, characterized in that: The clamping member four (84) comprises a clamping rod (841) located at the lower side of the clamping plate (831) and a plurality of elastic claws (842); the plurality of elastic claws (842) are fixedly connected to the clamping rod (841) and extend upward to between adjacent tail clamping claws (832); the clamping rod (841) is fixedly connected to the direction-changing component one (54); and the elastic claws (842) are made of elastic material at least at the portion used for clamping.

8. A solder strip clamping mechanism according to claim 7, characterized in that: The moving member (74) comprises a deflection plate (91) and a pair of fixing members (92); the deflection plate (91) is fixedly connected to the power mechanism (73); the end of the deflection plate (91) close to the power mechanism (73) extends to both sides, and the extended portion is slidably connected to the pair of fixing members (92); the fixing member (92) is fixedly connected to the lower side of the guide groove plate (701); a pair of deflection grooves (911) are provided in the middle of the moving member (74); the pair of deflection grooves (911) are provided in the deflection plate (91); the deflection grooves (911) extend in the direction of the end close to the power mechanism (73), and are also inclined towards both sides of the deflection plate (91) to form a groove with an arc path.

9. A solder strip clamping mechanism according to claim 8, characterized in that: The direction-changing component 1 (54) includes a pair of direction-changing components 1 (94); the direction-changing component 2 (55) includes a pair of direction-changing components 2 (95); the pair of direction-changing components 1 (94) and the pair of direction-changing components 2 (95) are arranged at intervals; the direction-changing components 1 (94) and 2 (95) located adjacent to each other in the middle extend to the upper side of the direction-changing groove (911); the extended parts of the direction-changing components 1 (94) and 2 (95) are fixedly connected with bolts; and the bolts are placed in the direction-changing groove (911).

10. A solder strip clamping mechanism according to claim 9, characterized in that: A sliding rod (93) is fixedly connected to the lower side of the guide groove plate (701); a pair of first direction-changing members (94) and a pair of second direction-changing members (95) are both slidably connected to the sliding rod (93); a side of each first direction-changing member (94) away from the direction-changing groove (911) is fixedly connected to a clamping rod (841); and an upper side of each second direction-changing member (95) protrudes upward and is fixedly connected to the clamping plate (831).

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