Method for replacing welding column with one hand and automatic resistance welding equipment for cylindrical battery

Abstract

The invention provides a method for replacing a welding column with one hand and automatic resistance welding equipment for a cylindrical battery. The method for replacing the welding column with the single hand comprises the following steps that the locking wrench is rotated forwards to a preset angle so as to loosen the movable ends of the first fixing clamping block and the second fixing clamping block; the metal conductive rod is pressed, so that the welding column avoids blocking of the clamping side seat; reversely rotating the locking wrench to an original angle so as to lock the metal conductive rod; the damaged welding column clamped on the metal conductive rod is taken out; the welding column to be replaced is clamped back to the metal conductive rod; the locking wrench is rotated forwards to a preset angle, so that the metal conductive rod is reset; and the locking wrench is reversely rotated to the original angle so as to lock the metal conductive rod. The method not only is simple in structure and labor-saving in operation, but also is particularly suitable for replacing the welding column in a narrow space.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery resistance welding, in particular to a method for single-handed replacement of welding posts and an automatic resistance welding device for cylindrical batteries. BACKGROUND

[0002] At present, the relatively mature welding processes include resistance welding, laser welding and ultrasonic aluminum wire welding. Resistance welding has been widely used in the field of battery welding because it does not need to add welding material, has high welding efficiency and mature process. However, when resistance welding is used for welding, the welding rod and the welding post are responsible for transmitting huge current and pressure, and the area of the welding rod is smaller than that of the welding post, so the damage rate of the welding rod is much higher than that of the welding post. Therefore, most scholars focus on how to quickly replace the damaged welding rod, for example, Chinese patent document No. CN207414576U discloses a resistance welding machine quick replacement welding rod device, resulting in fewer ways to quickly replace the damaged welding post.

[0003] At present, when replacing the damaged welding post, the operator needs to use auxiliary tools to disassemble the bolts of the cylindrical battery resistance welding bottom die device fixing seat first, then press the metal conducting rod downward with one hand, so that the welding post is lowered to a position avoiding the blocking of the clamping side seat, at this time the hand pressing action needs to be kept unchanged, then the other hand takes out the damaged welding post stuck on the metal conducting rod, and puts the new welding post back on the metal conducting rod, finally locks the bolts, so as to complete the replacement of the damaged welding post. However, the above replacement method requires both hands to operate when disassembling and assembling the welding post, and the hand pressing the metal conducting rod needs to be kept in the same position to complete the replacement, which is laborious. SUMMARY

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art, and to provide a method for single-handed replacement of welding posts and an automatic resistance welding device for cylindrical batteries, which is simple in structure, labor-saving and especially suitable for narrow spaces.

[0005] The purpose of the present disclosure is achieved by the following technical solutions:

[0006] A method for single-handed replacement of welding posts is performed on a resistance welding bottom die device for cylindrical batteries, which includes the following steps:

[0007] The locking wrench is turned forward to a preset angle to loosen the movable end of the first fixed clamping block and the second fixed clamping block;

[0008] The first fixed clamping block and the second fixed clamping block of the resistance welding bottom die device for the cylindrical battery are oppositely arranged on the workbench of the rack and are formed with a clamping cavity; the clamping cavity is used for accommodating a metal conductive rod; an insulating sleeve is arranged between the metal conductive rod and the clamping cavity;

[0009] The locking piece and the locking wrench are respectively located on both sides of the metal conductive rod, the first end of the first fixed clamping block is detachably arranged with the first end of the second fixed clamping block through the locking piece, the second end of the first fixed clamping block is detachably arranged with the second end of the second fixed clamping block through the locking wrench, the second end of the first fixed clamping block and the second end of the second fixed clamping block are movable ends, and a welding column is clamped on the metal conductive rod;

[0010] The metal conductive rod is pressed to avoid the welding column from being blocked by the clamping side seat;

[0011] The locking wrench is reversely rotated to the original angle to lock the metal conductive rod;

[0012] The damaged welding column clamped on the metal conductive rod is taken out;

[0013] The welding column to be replaced is clamped back on the metal conductive rod;

[0014] The locking wrench is forwardly rotated to the preset angle to reset the metal conductive rod;

[0015] The locking wrench is reversely rotated to the original angle to lock the metal conductive rod.

[0016] In one of the embodiments, when the locking wrench is forwardly rotated to the preset angle, the second end of the second fixed clamping block is fixed to the first end of the second fixed clamping block as a fixed fulcrum.

[0017] In one of the embodiments, when the locking wrench is reversely rotated to the original angle, the second end of the second fixed clamping block is fixed to the first end of the second fixed clamping block as a fixed fulcrum.

[0018] In one of the embodiments, the preset angle is 10°-90°.

[0019] In one of the embodiments, a preset movable gap is formed between the first fixed clamping block and the second fixed clamping block, and the preset movable gap is communicated with the clamping cavity.

[0020] In one of the embodiments, the insulating sleeve is formed with an extrusion accommodation channel.

[0021] In one of the embodiments, the extrusion accommodation channel is communicated with the preset movable gap; and / or,

[0022] The insulating sleeve is an elastic insulating sleeve; and / or,

[0023] The thickness of the insulating sleeve is 1-5 cm.

[0024] In one of the embodiments, the center point of the clamping cavity is arranged close to the second end of the second fixed clamping block.

[0025] In one of the embodiments, the first fixed clamping block is formed with a receiving groove, the receiving groove is formed with a first arc-shaped positioning groove, the second fixed clamping block is correspondingly formed with a second arc-shaped positioning groove, and the first arc-shaped positioning groove and the second arc-shaped positioning groove jointly form the clamping cavity; and / or,

[0026] The insulating sleeve comprises a limiting flange and a sleeve part connected with each other, the limiting flange is clamped in the workbench, and the sleeve part is formed with a wrapping cavity for accommodating the metal conductive rod.

[0027] An automatic resistance welding device for cylindrical batteries comprises a welding pin device, a welding machine and a resistance welding bottom die device for cylindrical batteries, the welding pin device is arranged on the workbench and is arranged opposite to the welding column of the resistance welding bottom die device for cylindrical batteries, the welding machine is located below the workbench and is electrically connected with one end of the metal conductive rod, and the resistance welding bottom die device for cylindrical batteries is used to perform the method for replacing the welding column with one hand as described in any one of the embodiments.

[0028] Compared with the prior art, the present disclosure has at least the following advantages:

[0029] Due to the resistance welding bottom die device for cylindrical battery, the first fixed clamping block and the second fixed clamping block are oppositely arranged on the workbench of the rack and are formed with a clamping cavity; the clamping cavity is used for accommodating the metal conductive rod; the insulating sleeve is arranged between the metal conductive rod and the clamping cavity; so as to realize the insulating arrangement of the metal conductive rod and the first fixed clamping block and the second fixed clamping block; and due to the fact that the locking piece and the locking wrench are respectively located on the two sides of the metal conductive rod, the first end of the first fixed clamping block is detachably arranged with the first end of the second fixed clamping block through the locking piece, so that the metal conductive rod is clamped and fixed on one side, and the operator can conveniently disassemble and assemble the first end of the first fixed clamping block and the first end of the second fixed clamping block; the second end of the first fixed clamping block is detachably arranged with the second end of the second fixed clamping block through the locking wrench, so that the metal conductive rod is clamped and fixed on the other side, and the operator can conveniently disassemble and assemble the second end of the first fixed clamping block and the second end of the second fixed clamping block; when the operator rotates the locking wrench to a preset angle in a forward direction, the second end of the second fixed clamping block can be fixed on the first end of the second fixed clamping block as a fixed fulcrum, the second end of the first fixed clamping block and the second fixed clamping block are loosened, and the metal conductive rod in the clamping cavity is in an unlocked state; when the operator presses the metal conductive rod, the welding column can avoid the position blocked by the clamping side seat, then the locking wrench is reversely rotated to the original angle, the metal conductive rod is locked, then the damaged welding column clamped on the metal conductive rod is taken out, then a new welding column is clamped on the metal conductive rod, then the locking wrench is forwardly rotated to the original angle, so that the metal conductive rod can be reset after the external force disappears, finally the locking wrench is reversely rotated to the original angle, so that the metal conductive rod is locked, thereby the replacement of the damaged welding column is completed, in this way, the locking wrench can realize the locking and fixing of the pressed metal conductive rod, the operator does not need to keep pressing the metal conductive rod with hands, the hand pressing operation is effectively released, the operation becomes labor-saving, the operator can complete the replacement operation with one hand, and the replacement efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present disclosure, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0031] Figure 1 Flow chart of the method for replacing the welding column with one hand according to an embodiment of the present disclosure;

[0032] Figure 2 Directional structural schematic diagram of the resistance welding bottom die device for cylindrical battery according to an embodiment of the present disclosure;

[0033] Figure 3 for Figure 2 Another direction structure diagram of the resistance welding bottom die device for cylindrical batteries shown in FIG. 1;

[0034] Figure 4 for Figure 2 A one-direction sectional view of the resistance welding bottom die device for cylindrical batteries shown in FIG. 1;

[0035] Figure 5 A partial structure diagram of the resistance welding bottom die device for cylindrical batteries of an embodiment of the present application;

[0036] Figure 6 A one-direction structure diagram of the fixed base connected with the metal conductive rod of an embodiment of the present application;

[0037] Figure 7 for Figure 6 An enlarged view of A shown in FIG. 2;

[0038] Figure 8 for Figure 6 Another direction structure diagram of the fixed base shown in FIG. 2;

[0039] Figure 9 A one-direction structure diagram of the insulating sleeve of an embodiment of the present application;

[0040] Figure 10 A partial one-direction structure diagram of the automatic resistance welding equipment for cylindrical batteries of an embodiment of the present application;

[0041] Figure 11 A field actual object diagram of the automatic resistance welding equipment for cylindrical batteries of an embodiment of the present application;

[0042] The drawing label: 1, the automatic resistance welding equipment for cylindrical batteries; 10, the resistance welding bottom die device for cylindrical batteries; 100, the workbench; 110, the through hole; 210, the first fixed clamping block; 211, the first threaded hole; 213, the first arc-shaped positioning groove; 220, the second fixed clamping block; 221, the first mounting hole; 223, the second arc-shaped positioning groove; 230, the insulating sleeve; 231, the extrusion containing channel; 232, the limiting flange; 233, the sleeving part; 2331, the wrapping cavity; 240, the metal conductive rod; 241, the clamping boss; 250, the welding column; 260, the locking wrench; 261, the handle; 2611, the rotating part; 262, the second elastic member; 263, the first bolt; 270, the locking member; 280, the clamping cavity; 290, the preset movable gap; 300, the clamping side seat; 310, the insulating positioning cavity; 320, the limiting groove; 410, the limiting frame; 420, the first elastic member; 500, the metal spacer sleeve; 20, the welding pin device. DETAILED DESCRIPTION

[0043] For the purposes of this disclosure, a more complete understanding can be obtained by reference to the following description taken in connection with the accompanying drawings described below. The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0044] It is noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein, the terms "vertical", "horizontal", "left", "right", and the like are used for explanation purposes only and are not intended to limit the present disclosure.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0046] Please refer to Figure 1 In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below in combination with specific embodiments. In one embodiment, a method for replacing a welding stud 250 with one hand is performed on a resistance welding bottom die device 10 for cylindrical batteries.

[0047] In one embodiment, the method for replacing the welding stud 250 with one hand includes some or all of the following steps:

[0048] S101, rotate the locking wrench 260 to a preset angle in a forward direction to loosen the movable end of the first fixed clamping block 210 and the second fixed clamping block 220.

[0049] It can be understood that, as Figures 2 to 4As shown, the resistance welding die device 10 for cylindrical battery includes a rack, a fixed base, a clamping side seat 300 and an anti-falling assembly. The fixed base includes a first fixed clamp block 210, a second fixed clamp block 220, an insulating sleeve 230, a metal conductive rod 240, a welding column 250, a locking wrench 260 and a locking piece 270. The first fixed clamp block 210 and the second fixed clamp block 220 are oppositely arranged on the workbench 100 of the rack and are formed with a clamping cavity 280. The clamping cavity 280 is used for accommodating the metal conductive rod 240. The clamping cavity 280 is used for accommodating the metal conductive rod 240, so that the metal conductive rod 240 can move in the clamping cavity 280 when it is not fixed, so that the operator can press the movable metal conductive rod 240. The insulating sleeve 230 is arranged between the metal conductive rod 240 and the clamping cavity 280. The metal conductive rod 240, the first fixed clamp block 210 and the second fixed clamp block 220 are insulated, so as to ensure the normal operation of resistance welding.

[0050] As can be understood, Figure 6 and Figure 8 As shown, the locking piece 270 and the locking wrench 260 are located on both sides of the metal conductive rod 240. The first end of the first fixed clamp block 210 is detachably arranged with the first end of the second fixed clamp block 220 through the locking piece 270. When one side of the metal conductive rod 240 is clamped and fixed, it is also convenient for the operator to disassemble the first end of the first fixed clamp block 210 and the first end of the second fixed clamp block 220. The second end of the first fixed clamp block 210 is detachably arranged with the second end of the second fixed clamp block 220 through the locking wrench 260. The second end of the first fixed clamp block 210 and the second end of the second fixed clamp block 220 are movable ends. When the other side of the metal conductive rod 240 is clamped and fixed, it is also convenient for the operator to disassemble the second end of the first fixed clamp block 210 and the second end of the second fixed clamp block 220. The welding column 250 is clamped on the metal conductive rod 240, which is convenient for the operator to disassemble and weld. When the operator rotates the locking wrench 260 to a preset angle, the second end of the second fixed clamp block 220 can be fixed with the first end of the second fixed clamp block 220 as a fixed fulcrum, the second end of the first fixed clamp block 210 and the second end of the second fixed clamp block 220 are loosened, and the metal conductive rod 240 in the clamping cavity 280 is in an unlocked state. The metal conductive rod 240 can move in the clamping cavity 280 under the action of external pressing.

[0051] As can be understood, Figure 2 and Figure 3As shown, since the clamping side seat 300 is arranged on one side of the first fixed clamping block 210, the clamping side seat 300 is used to clamp and fix the cylindrical battery, so that the clamping side seat 300 can form a blocking limit on the first fixed clamping block 210, thereby better preventing the welding column 250 and the cylindrical battery from easily falling off, thereby achieving better clamping and fixing of the cylindrical battery, and effectively avoiding the problem that the cylindrical battery is easily loose during welding.

[0052] It can also be understood that, as Figure 2 As shown, since the anti-falling assembly includes a limiting frame 410 and a first elastic member 420, the limiting frame 410 is arranged on the side of the workbench 100 away from the welding column 250, so that the welding column 250 can be located above the workbench 100, and the welding machine can be located below the workbench 100, thereby improving the compactness and stability of the vertical space distribution of the resistance welding bottom die device 10 for cylindrical batteries, and better adapting to the application of automatic resistance welding equipment with relatively narrow space.

[0053] In one embodiment, when the locking wrench 260 is rotated forward to a preset angle, the second end of the second fixed clamping block 220 is fixed as a fulcrum at the first end of the second fixed clamping block 220, so as to loosen one side of the metal conductive rod 240.

[0054] S102, press the metal conductive rod 240, so that the welding column 250 avoids the blocking of the clamping side seat 300, so as to facilitate the operator to disassemble and assemble the welding column 250.

[0055] S103, reverse rotation of the locking wrench 260 to the original angle to lock the metal conductive rod 240. It can be understood that in one embodiment, when the locking wrench 260 is reversely rotated to the original angle, the second end of the second fixed clamping block 220 is fixed as a fulcrum at the first end of the second fixed clamping block 220, so as to lock and fix the metal conductive rod 240.

[0056] S104, the damaged welding post 250 on the metal conducting rod 240 is taken out, and the added locking wrench 260 can lock and fix the pressed metal conducting rod 240, so that the operator does not need to keep pressing the metal conducting rod 240 with hands, effectively liberates the hand pressing operation, makes the operation labor-saving, and ensures that the operator can complete the replacement operation with one hand, thereby improving the replacement efficiency.

[0057] S105, the damaged welding post 250 is clamped back on the metal conducting rod 240, so as to complete the replacement of the damaged welding post 250.

[0058] As shown in the drawings, Figure 6 In one embodiment, one end of the metal conducting rod 240 is formed with a clamping boss 241, and the end of the welding post 250 is formed with a clamping groove, and the welding post 250 is clamped in the clamping groove of the clamping boss 241, so as to realize the clamping of the welding post 250 and the metal conducting rod 240, and facilitate the operator to disassemble and assemble the welding post 250.

[0059] S106, the locking wrench 260 is rotated forward to the preset angle, so that the metal conducting rod 240 is reset, that is, the metal conducting rod 240 is in an unlocked state, and the metal conducting rod 240 is reset by the action of the first elastic member 420 after the external force disappears.

[0060] S107, the locking wrench 260 is rotated reversely to the original angle, so as to lock the metal conducting rod 240, and prepare for the resistance welding operation process.

[0061] It should be noted that in actual application, the rotating locking structure of the locking wrench 260 usually needs to additionally use a limiting block to realize the clamping and fixing of the metal conducting rod 240, but there is a problem of complex structure. Therefore, in the present disclosure, the first end of the first and second fixed clamping blocks 210 and 220 is taken as a fixed fulcrum by the locking member 270, and the second end of the first and second fixed clamping blocks 210 and 220 is taken as a movable end by the locking wrench 260. When the operator rotates the locking wrench 260, the second end of the first and second fixed clamping blocks 210 and 220 is loosened, so that the metal conducting rod 240 located in the middle of the locking member 270 and the locking wrench 260 is in an unlocked state, the operator can press the metal conducting rod 240, and the limiting block is not needed, so that the structure of the resistance welding bottom mold device 10 for cylindrical batteries becomes simple and the operation is labor-saving.

[0062] The above-mentioned method for replacing the welding column 250 with one hand, when the operator rotates the locking wrench 260 in the forward direction to the preset angle, enables the second end of the second fixed clamping block 220 to be loosened with the first end of the second fixed clamping block 220 as the fixed fulcrum, so that the metal conductive rod 240 located in the clamping cavity 280 is in an unlocked state; when the operator presses the metal conductive rod 240, the welding column 250 can avoid the position blocked by the clamping side seat 300, and then the locking wrench 260 is rotated in the reverse direction to the original angle to lock the metal conductive rod 240, then the damaged welding column 250 clamped on the metal conductive rod 240 is taken out, then the new welding column 250 is clamped on the metal conductive rod 240, then the locking wrench 260 is rotated in the forward direction to the original angle, so that the metal conductive rod 240 can be reset after the external force disappears, and finally the locking wrench 260 is rotated in the reverse direction to the original angle to lock the metal conductive rod 240, thereby completing the replacement of the damaged welding column 250. In this way, the locking wrench 260 added can realize the locking and fixing of the pressed metal conductive rod 240, without the need to always keep the hand pressing the metal conductive rod 240, effectively freeing the hand pressing operation, making the operation labor-saving, and also ensuring that the operator can complete the replacement operation with one hand, improving the replacement efficiency; and the structure is simple.

[0063] As shown in Figure 5 and Figure 6 In one embodiment, the locking wrench 260 includes a handle 261, a second elastic member 262, and a first bolt 263. The handle 261 is rotationally arranged at one end of the first bolt 263, so that when the operator rotates the handle 261, the first bolt 263 is driven to rotate, thereby loosening the second end of the first fixed clamping block 210 and the second fixed clamping block 220. The second elastic member 262 is arranged between the handle 261 and the first bolt 263, so that the added first elastic member 420 can ensure that the operator rotates the handle 261 more smoothly and not easily jammed, thereby ensuring that the rotation operation is more labor-saving. The other end of the first bolt 263 passes through the first mounting hole 221 of the second end of the second fixed clamping block 220 and is screwed into the first threaded hole 211 of the second end of the first fixed clamping block 210, thereby realizing the detachable arrangement of the second end of the first fixed clamping block 210 and the second end of the second fixed clamping block 220 for the operator to disassemble.

[0064] As shown in Figure 5As shown in the drawings, in one embodiment, the first bolt 263 is formed with a gear portion at the end thereof towards the handle 261, the gear portion is composed of a plurality of gears; the rotating portion 2611 of the handle 261 is formed with an engaging portion towards the gear portion, the engaging portion is in rotational engagement with the gear portion, so as to ensure that the operator can drive the engaging portion to rotate when rotating the handle 261, thereby driving the gear portion to rotate, so that the first bolt 263 rotates with the handle 261, thereby realizing the locking or loosening of the second end of the first fixed clamping block 210 and the second end of the second fixed clamping block 220.

[0065] In one embodiment, the second elastic member 262 is a spring, and the second elastic member 262 is sleeved on the rotating portion 2611 of the handle 261, so as to ensure that the operator can rotate the handle 261 smoothly without jamming.

[0066] As shown in the drawings, Figure 2 In one embodiment, the locking member 270 is a second bolt, the second bolt passes through the second mounting hole of the first end of the second fixed clamping block 220, and is screwed into the second threaded hole of the first end of the first fixed clamping block 210, so as to realize the detachable arrangement of the first end of the first fixed clamping block 210 and the first end of the second fixed clamping block 220 by the locking member 270.

[0067] In one embodiment, the end of the second bolt is formed with a positioning portion, which can be clamped with an external auxiliary tool, such as an internal hexagon, so as to realize the locking and loosening of the second bolt, thereby better adapting to the clamping and fixing of metal conductive rods 240 of different specifications and sizes.

[0068] As shown in the drawings, Figure 4 In one embodiment, the first fixed clamping block 210 is formed with a receiving groove, the receiving groove is formed with a first arc-shaped positioning groove 213, and the second fixed clamping block 220 is correspondingly formed with a second arc-shaped positioning groove 223, the first arc-shaped positioning groove 213 and the second arc-shaped positioning groove 223 jointly form the clamping cavity 280, so as to divide the clamping cavity 280 into two halves, on the one hand, facilitating the operator to assemble, and on the other hand, better adapting to the clamping and fixing of metal conductive rods 240 of different specifications.

[0069] As shown in the drawings, Figure 7 and Figure 8 In one embodiment, the first end of the second fixed clamping block 220 is arranged close to the clamping side seat 300, and the second end of the second fixed clamping block 220 is arranged away from the clamping side seat 300, so that the second end of the second fixed clamping block 220 is kept at a larger distance from the first end, thereby ensuring that the operator only needs to exert a smaller force to realize the forward or reverse rotation operation of the locking wrench 260.

[0070] In one embodiment, the center point of the clamping cavity 280 is arranged close to the second end of the second fixed clamping block 220, so that the clamping cavity 280 is close to the second end of the second fixed block, and the operator only needs to slightly rotate the locking wrench 260 to loosen the metal conductive rod 240 in the clamping cavity, so as to better adapt to the application of the resistance welding bottom die device 10 for cylindrical batteries in narrow space.

[0071] It can be understood that in actual application, the automatic resistance welding equipment for cylindrical batteries has many accessories and is large, such as Figure 11 As shown in the figure, due to the resistance of the rotating disc and the workbench 100, the space of the resistance welding bottom die device 10 for cylindrical batteries is extremely narrow, which limits the space of the operator to replace the welding column 250, that is, it is difficult to complete the 360° rotation of the locking part 270 and the locking wrench 260 at one time.

[0072] Therefore, in the present disclosure, by setting the preset angle to 10°-90°, especially with the second end of the second fixed clamping block 220, the first end of the second fixed clamping block 220 is arranged as a fixed fulcrum, the first end of the second fixed clamping block 220 is arranged close to the clamping side seat 300, and the second end of the second fixed clamping block 220 is arranged away from the clamping side seat 300, so that the operator only needs to rotate the locking wrench 260 to 10°-90° to loosen the metal conductive rod 240, without rotating 360°, so as to better adapt to the application of the resistance welding bottom die device 10 for cylindrical batteries in narrow space.

[0073] It should be noted that although the additional locking wrench 260 solves the problem of simple structure and labor-saving to some extent, since the first fixed clamping block 210 and the second fixed clamping block 220 are arranged separately, in order to ensure reliable and stable clamping and fixing of the metal conductive rod 240, most scholars will use the locking part 270 and the locking wrench 260 to directly lock the first fixed clamping block 210 and the second fixed clamping block 220 in abutment, that is, there is no gap between the first fixed clamping block 210 and the second fixed clamping block 220. However, the locking method without gap between the first fixed clamping block 210 and the second fixed clamping block 220 cannot provide a space for the loosened second fixed clamping block 220, so that the operator needs to loosen the locking wrench 260 and the locking part 270 at the same time, or needs to completely unscrew the locking wrench 260 from the first fixed clamping block 210 to complete the subsequent pressing operation of the metal conductive rod 240, which causes the replacement operation to be more complex and time-consuming, thereby reducing the efficiency of replacing the welding column 250.

[0074] Therefore, as shown in Figure 6 and Figure 7As shown, in one of the embodiments, a preset movable gap 290 is formed between the first fixed clamping block 210 and the second fixed clamping block 220, and the preset movable gap 290 is communicated with the clamping cavity 280, so that the added preset movable gap 290 can provide a movable space for the second end of the second fixed clamping block 220, such as facilitating the slight inclination of the second fixed clamping block 220, when the operator rotates the locking wrench 260 to a preset angle in the forward direction, the second end of the second fixed clamping block 220 can be fixed at the first end of the second fixed clamping block 220 as a fixed fulcrum, so as to loosen the second end of the first fixed clamping block 210 and the second fixed clamping block 220. In this way, the locking wrench 260 and the locking piece 270 do not need to be loosened at the same time, and the first fixed clamping block 210 and the second fixed clamping block 220 can be loosened without completely unscrewing the locking wrench from the first fixed clamping block 210, which not only simplifies the operation, but also saves time and effectively improves the efficiency of replacing the welding column 250.

[0075] It can also be understood that the added preset movable gap 290 can provide a space for the extrusion deformation of the insulating sleeve 230, so as to reliably and stably clamp and fix the metal conductive rod 240.

[0076] In one of the embodiments, the preset movable gap 290 is the relative clamping gap of the first fixed clamping block 210 and the second fixed clamping block 220.

[0077] In one of the embodiments, the width of the preset movable gap 290 is equal, which not only meets the reliable and stable fixation of the metal conductive rod 240, but also facilitates the operator to quickly loosen the second end of the first fixed clamping block 210 and the second fixed clamping block 220, so that the operator can loosen the second end of the first fixed clamping block 210 and the second fixed clamping block 220 when rotating to a preset angle, which not only simplifies the operation, but also saves time and effectively improves the efficiency of replacing the welding column 250.

[0078] In one of the embodiments, the insulating sleeve 230 is an elastic insulating sleeve 230, which can be deformed well under the action of an external force, so as to facilitate the operator to sleeve different specifications of metal conductive rods 240, and also can clamp and fix different specifications of metal conductive rods 240.

[0079] In one of the embodiments, the elastic insulating sleeve 230 is plastic, which can be selected according to actual needs by those skilled in the art.

[0080] In one of the embodiments, the thickness of the insulating sleeve 230 is 1cm-5cm.

[0081] It should be noted that although the added preset movable gap 290 can provide a movable space for the second end of the second fixed clamping block 220 and can achieve reliable and stable clamping and fixing of the metal conductive rod 240, it may cause the insulating sleeve 230 to be easily damaged due to repeated large extrusion.

[0082] Therefore, as shown in Figure 8 and Figure 9 in one embodiment, the insulating sleeve 230 is formed with an extrusion accommodation channel 231; the added extrusion accommodation channel 231 is beneficial for extrusion deformation, so that while meeting the reliable and stable locking and fixing of the first fixed clamping block 210 and the second fixed clamping block 220, it can also provide stress buffering for the insulating sleeve 230 when it is subjected to a large extrusion force, effectively reducing the probability of damage to the insulating sleeve 230 due to repeated large extrusion; and the added extrusion accommodation channel 231 facilitates the operator to assemble the sleeve connection of metal conductive rods 240 of different specifications, ensuring that a single insulating sleeve 230 can adapt to metal conductive rods 240 of different specifications, so that the operator does not need to frequently replace the insulating sleeve 230, thereby improving the adaptability of the resistance welding bottom die device 10 for cylindrical batteries to metal conductive rods 240 of different specifications.

[0083] As shown in Figure 9 in one embodiment, the extrusion accommodation channel 231 is arranged along the length direction of the insulating sleeve 230, so that the extrusion accommodation channel 231 completely penetrates the longitudinal plane of the outer peripheral wall of the insulating sleeve 230, to form a gap on one side of the insulating sleeve 230, so that on the one hand, it is convenient for the operator to move the insulating sleeve 230 to complete the sleeve connection operation of metal conductive rods 240 of different specifications; on the other hand, the extrusion accommodation channel 231 can provide a relatively comprehensive extrusion deformation space for the longitudinal plane of the insulating sleeve 230, to achieve stable clamping force of the metal conductive rod 240.

[0084] As shown in Figure 9As shown, in one of the embodiments, the insulating sleeve 230 comprises a limiting flange 232 and a sleeve joint 233 connected together, so that the limiting flange 232 can be clamped in the through hole 110 of the workbench 100 to achieve the clamping arrangement of the workbench 100 and the insulating sleeve 230; a wrapping cavity 2331 is formed in the sleeve joint 233, and an extrusion containing channel 231 is formed on the outer peripheral wall of the wrapping cavity 2331 and communicates with the wrapping cavity 2331, and the extrusion containing channel 231 extends from one end of the sleeve joint 233 to the end of the limiting flange 232 away from the sleeve joint 233, that is, the extrusion containing channel 231 is arranged along the length direction of the sleeve joint 233 and extends to the end of the limiting flange 232 away from the sleeve joint 233, so that the extrusion containing channel 231 completely penetrates the longitudinal plane of the outer peripheral wall of the insulating sleeve 230, thereby ensuring that the extrusion containing channel 231 can better buffer the stress of the extruded insulating sleeve 230 at any angle, and thus the service life of the insulating sleeve 230 is improved.

[0085] In one of the embodiments, the limiting flange 232 and the sleeve joint 233 are integrally formed, thereby improving the service life of the insulating sleeve 230.

[0086] It can be understood that although the additional extrusion containing channel 231 can provide space for the extrusion deformation of the insulating sleeve 230, if the extrusion containing channel 231 is installed towards the first fixed clamp block 210 or the second fixed clamp block 220, when the insulating sleeve 230 is extruded and locked, the thickness of the extruded insulating sleeve 230 will be thinned, that is, the distance between the metal conductive rod 240 and the first fixed clamp block 210 or the distance between the metal conductive rod 240 and the second fixed clamp block 220 is shortened, which leads to the probability of short circuit between the metal conductive rod 240 and the first fixed clamp block 210 or the second fixed clamp block 220, that is, the insulation arrangement of the metal conductive rod 240 and the first fixed clamp block 210 or the second fixed clamp block 220 cannot be well guaranteed.

[0087] Therefore, in one of the embodiments, the width D1 of the extrusion containing channel 231 is equal to k*(D width of the extrusion deformation of the insulating sleeve 230-D width of the insulating sleeve 230 without extrusion deformation), and k is 0.2-0.6, so as to ensure that the width of the extrusion containing channel 231 is appropriate, which not only meets the release of extrusion stress, but also ensures that the clamped and fixed extruded insulating sleeve 230 can completely fill the extrusion containing channel 231, effectively reduces the probability of short circuit between the metal conductive rod 240 and the first fixed clamp block 210 or the second fixed clamp block 220, and also reduces the probability of damage of the insulating sleeve 230 due to repeated large extrusion.

[0088] In one of the embodiments, the width of the extrusion containing channel 231 is not greater than the width of the preset movable gap 290.

[0089] It can be understood that, although the short circuit probability of the metal conductive rod 240 and the first fixed clamping block 210 and the second fixed clamping block 220 can be reduced to a certain extent by controlling the width of the extrusion accommodation channel 231, the short circuit probability still exists. Therefore, in one of the embodiments, the extrusion accommodation channel 231 is aligned with the preset movable gap 290, and the width of the extrusion accommodation channel 231 is not greater than the width of the preset movable gap 290, so that the operator can keep the metal conductive rod 240 exposed to the extrusion accommodation channel 231 in a spaced-apart state when locking and fixing the second ends of the first fixed clamping block 210 and the second fixed clamping block 220, thereby further reducing the short circuit probability of the metal conductive rod 240 and the first fixed clamping block 210 and the second fixed clamping block 220.

[0090] It can be understood that, since the extrusion accommodation channel 231 is aligned with the preset movable gap 290, the extrusion accommodation channel 231 is in communication with the preset movable gap 290, so that the preset movable gap 290 can provide stress buffering for the extrusion accommodation channel 231, thereby ensuring that the insulating sleeve 230 is not easily damaged when subjected to greater extrusion force, and reducing the short circuit probability of the metal conductive rod 240 and the first fixed clamping block 210 and the second fixed clamping block 220.

[0091] In one of the embodiments, the width of the extrusion accommodation channel 231 is equal to the width of the preset movable gap 290, so that, on the premise of further reducing the short circuit probability of the metal conductive rod 240 and the first fixed clamping block 210 and the second fixed clamping block 220, the extrusion accommodation channel 231 can also provide higher stress buffering for the insulating sleeve 230, effectively reducing the probability that the insulating sleeve 230 is easily damaged due to repeated extrusion, and effectively ensuring that the first fixed clamping block 210 and the second fixed clamping block 220 arranged in a split manner can reliably and stably clamp and fix the metal conductive rod 240.

[0092] In one of the embodiments, the width of the preset movable gap 290 and the width of the extrusion accommodation channel 231 are both 1 cm-5 cm.

[0093] In one of the embodiments, the width of the preset movable gap 290 is equal to the thickness of the insulating sleeve 230.

[0094] As shown in Figure 4 and Figure 5 In one of the embodiments, the resistance welding bottom die device 10 for cylindrical batteries further includes a metal spacer sleeve 500 sleeved on the outer peripheral wall of the metal conductive rod 240 and abutting against the limiting flange 232 of the insulating sleeve 230, so that the added metal spacer sleeve 500 can provide better structural support for the elastic insulating sleeve 230, thereby improving the service life of the elastic insulating sleeve 230.

[0095] In one of the embodiments, the metal spacer sleeve 500 can be fixed on one side of the metal conducting rod 240 by screw locking, so that the metal spacer sleeve 500 abutting against the limiting flange 232 of the insulating sleeve 230 can be insulated with the elastic insulating sleeve 230 and the metal conducting rod 240, and meanwhile, the reliability of the connection between the metal spacer sleeve 500 and the elastic insulating sleeve 230 and the metal conducting rod 240 is ensured, and the problem of easy falling of the metal spacer sleeve 500 during welding is effectively avoided.

[0096] As shown in Figure 4 In one of the embodiments, the workbench 100 is formed with a through hole 110, the metal conducting rod 240 passes through the clamping cavity 280 and the through hole 110 in sequence, and protrudes below the workbench 100, so that the metal conducting rod 240 can be electrically connected with the welding machine located below the workbench 100, thereby improving the compactness and stability of the vertical space distribution of the resistance welding bottom die device 10 for cylindrical batteries, and better adapting to the application of the automatic resistance welding equipment with narrow space.

[0097] As shown in Figure 2 In one of the embodiments, the clamping side seat 300 is formed with an insulating positioning cavity 310 on the side facing the welding column 250, so as to realize the insulation of the clamping side seat 300 and the cylindrical battery; and since the positioning cavity is used for placing the cylindrical battery, the fixation of the cylindrical battery is realized.

[0098] As shown in Figure 2 and Figure 3 In one of the embodiments, the clamping side seat 300 is further formed with a limiting groove 320 communicating with the insulating positioning cavity 310 on the side facing the welding column 250, and the added limiting groove 320 can effectively avoid the problem of easy falling of the welding column 250 during welding, thereby ensuring the reliable stability of the welding of the cylindrical battery.

[0099] In one of the embodiments, the metal conducting rod 240 is a conducting copper rod.

[0100] In one of the embodiments, the metal spacer sleeve 500 is an aluminum spacer sleeve.

[0101] It should be noted that the connection structure of the welding needle device movably arranged on the workbench 100, the specific structure of the welding needle device 20, the connection structure of the welding machine and the metal conducting rod 240, and the specific structure of the welding machine all belong to the prior art. Therefore, they are not specifically described in the present disclosure.

[0102] As shown in Figure 10As shown, the present disclosure also provides an automatic resistance welding device 1 for cylindrical batteries, which comprises a welding pin device 20, a welding machine and the resistance welding bottom die device 10 for cylindrical batteries, the welding pin device 20 is arranged on the workbench 100 and is arranged opposite to the welding column 250 of the resistance welding bottom die device 10 for cylindrical batteries, the welding machine is located below the workbench 100 and is electrically connected to one end of the metal conductive rod 240 to provide current for welding, thereby ensuring the normal operation of resistance welding; the resistance welding bottom die device 10 for cylindrical batteries is used to perform the method of replacing the welding column 250 with one hand as described in any of the above embodiments, so that the resistance welding bottom die device 10 for cylindrical batteries of the present disclosure can ensure that the operator can complete the replacement of the welding column 250 with one hand, which is not only simple to operate, but also saves labor, effectively improves the efficiency of replacing the welding column 250, and is especially suitable for the replacement of welding columns in narrow spaces.

[0103] Compared with the prior art, the present disclosure has at least the following advantages:

[0104] The first fixed clamping block 210 and the second fixed clamping block 220 of the resistance welding bottom die device 10 for the cylindrical battery are oppositely arranged on the workbench 100 of the rack and are formed with a clamping cavity 280; the clamping cavity 280 is used for accommodating the metal conductive rod 240; the insulating sleeve 230 is arranged between the metal conductive rod 240 and the clamping cavity 280; so as to realize the insulation arrangement of the metal conductive rod 240, the first fixed clamping block 210 and the second fixed clamping block 220; since the locking piece 270 and the locking wrench 260 are respectively located on both sides of the metal conductive rod 240, the first end of the first fixed clamping block 210 is detachably arranged with the first end of the second fixed clamping block 220 through the locking piece 270, which facilitates the operator to detach and assemble the first end of the first fixed clamping block 210 and the first end of the second fixed clamping block 220 while realizing the clamping and fixing of one side of the metal conductive rod 240; the second end of the first fixed clamping block 210 is detachably arranged with the second end of the second fixed clamping block 220 through the locking wrench 260, which facilitates the operator to detach and assemble the second end of the first fixed clamping block 210 and the second end of the second fixed clamping block 220 while realizing the clamping and fixing of the other side of the metal conductive rod 240; when the operator rotates the locking wrench 260 forward to a preset angle, the second end of the second fixed clamping block 220 can be fixed with the first end of the second fixed clamping block 220 as a fixed fulcrum, the second end of the first fixed clamping block 210 and the second fixed clamping block 220 are loosened, and the metal conductive rod 240 in the clamping cavity 280 is in an unlocked state; when the operator presses the metal conductive rod 240, the welding column 250 can avoid the position blocked by the clamping side seat 300, then the locking wrench 260 is reversely rotated to the original angle to lock the metal conductive rod 240, then the damaged welding column 250 clamped on the metal conductive rod 240 is taken out, then the new welding column 250 is clamped on the metal conductive rod 240, then the locking wrench 260 is forwardly rotated to the original angle, so that the metal conductive rod 240 can be reset after the external force disappears, and finally the locking wrench 260 is reversely rotated to the original angle to lock the metal conductive rod 240, so as to complete the replacement of the damaged welding column 250; in this way, the locking wrench 260 can realize the locking and fixing of the pressed metal conductive rod 240, without keeping the posture of pressing the metal conductive rod 240 with hands all the time, effectively liberating the hand pressing operation, making the operation labor-saving, and ensuring that the operator can complete the replacement operation with one hand, thereby improving the replacement efficiency.

[0105] The above-described embodiments are merely illustrative of several embodiments of the present disclosure, which are described in a more specific and detailed manner, but should not be construed as limiting the scope of the patent disclosure. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure should be subject to the appended claims.

Claims

1. A method of single-handedly replacing a solder post, characterized by, The method for replacing the welding column by one hand in the resistance welding bottom die device for cylindrical battery comprises the following steps: The locking wrench is turned to a preset angle in a forward direction to loosen the movable ends of the first fixed clamping block and the second fixed clamping block; The first fixed clamping block and the second fixed clamping block of the resistance welding bottom die device for cylindrical battery are oppositely arranged on the workbench of the rack and are formed with a clamping cavity; the clamping cavity is used for accommodating the metal conductive rod; an insulating sleeve is arranged between the metal conductive rod and the clamping cavity; The locking member and the locking wrench are respectively located on both sides of the metal conductive rod; the first end of the first fixed clamping block is detachably arranged with the first end of the second fixed clamping block through the locking member; the second end of the first fixed clamping block is detachably arranged with the second end of the second fixed clamping block through the locking wrench; the second ends of the first fixed clamping block and the second fixed clamping block are movable ends; the welding column is clamped on the metal conductive rod; The metal conductive rod is pressed to avoid the welding column from being blocked by the clamping side seat; The locking wrench is turned to an original angle in a reverse direction to lock the metal conductive rod; The damaged welding column clamped on the metal conductive rod is taken out; The welding column to be replaced is clamped back on the metal conductive rod; The locking wrench is turned to the preset angle in the forward direction to reset the metal conductive rod; The locking wrench is turned to the original angle in the reverse direction to lock the metal conductive rod.

2. The single-handed replacement of a terminal post method of claim 1, wherein, When the locking wrench is turned to the preset angle in the forward direction, the second end of the second fixed clamping block is fixed to the first end of the second fixed clamping block as a fixed fulcrum.

3. The single-handed replacement of a terminal post method of claim 1 wherein, When the locking wrench is turned to the original angle in the reverse direction, the second end of the second fixed clamping block is fixed to the first end of the second fixed clamping block as a fixed fulcrum.

4. The single hand terminal post change method of claim 1, wherein, The preset angle is 10°-90°.

5. The single hand terminal post change method of claim 1, wherein, A preset movable gap is formed between the first fixed clamping block and the second fixed clamping block, and the preset movable gap is communicated with the clamping cavity.

6. The method of claim 5, wherein, The insulating sleeve is formed with an extrusion accommodation channel.

7. The single-handed replacement of a terminal post method of claim 6, wherein, The extrusion accommodation channel is communicated with the preset movable gap; and / or The insulating sleeve is an elastic insulating sleeve; and / or The thickness of the insulating sleeve is 1cm-5cm.

8. The single hand terminal post change method of claim 1, wherein, The center point of the clamping cavity is arranged close to the second end of the second fixed clamping block.

9. The method of claim 1, wherein, The first fixed clamping block is formed with a containing groove, the containing groove is formed with a first arc-shaped positioning groove, the second fixed clamping block is correspondingly formed with a second arc-shaped positioning groove, and the first arc-shaped positioning groove and the second arc-shaped positioning groove jointly form the clamping cavity; and / or The insulating sleeve comprises a limiting flange and a sleeve part connected with each other, the limiting flange is clamped in the workbench, and the sleeve part is formed with a wrapping cavity used for accommodating the metal conductive rod.

10. An automatic resistance welding apparatus for cylindrical batteries, characterized by comprising: The welding needle device, the welding machine and the resistance welding bottom die device for cylindrical battery are arranged on the workbench, the welding needle device is oppositely arranged with the welding column of the resistance welding bottom die device for cylindrical battery, the welding machine is located below the workbench and is electrically connected with one end of the metal conductive rod, and the resistance welding bottom die device for cylindrical battery is used for executing the method for replacing the welding column by one hand in any one of claims 1-9.

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