Battery welding device and welding method

Abstract

The embodiment of the present invention provides a battery welding device and a welding method, which relate to the field of battery technology. The battery includes a frame, an upper cover plate and a lower cover plate, and the welding device includes a bottom plate, a long side positioning mechanism, a short side positioning mechanism and a welding mechanism; the lower cover plate, the frame and the upper cover plate are arranged on the bottom plate in sequence from bottom to top; the long side positioning mechanism is arranged on the bottom plate, and is used to simultaneously abut the outer side wall on one side of the long side of the frame, the long side of the upper cover plate and the long side of the lower cover plate; the short side positioning mechanism is arranged on the bottom plate, and is used to simultaneously abut the outer side wall on one side of the short side of the frame, the short side of the upper cover plate and the short side of the lower cover plate; the welding mechanism is arranged on one side of the bottom plate, and is used to weld between the upper cover plate and the frame and between the lower cover plate and the frame, which improves the welding consistency, and also improves the assembly and operation efficiency, and is not easy to cause problems such as cold welding, explosion points, and poor welding sealing.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery welding device and a welding method. Background Art

[0002] The welding of the upper and lower covers and frames of the battery is a key process in the packaging of the battery cells. The packaging of the battery cells is achieved by positioning and welding the upper and lower covers and frames.

[0003] Currently, the upper and lower cover plates and the frame are positioned manually, which can easily lead to misalignment of the cover plate and the frame, poor welding consistency, low assembly and operation efficiency, and easy to cause problems such as cold welding, burst points, and poor welding sealing. Summary of the invention

[0004] Objects of the present invention include, for example, providing a battery welding device that can solve the problems mentioned in the background art.

[0005] The object of the present invention also includes providing a welding method which can solve the problems mentioned in the background technology.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the present invention provides a battery welding device, wherein the battery comprises a frame, an upper cover plate and a lower cover plate, and the welding device comprises a bottom plate, a long side positioning mechanism, a short side positioning mechanism and a welding mechanism;

[0008] The lower cover plate, the frame and the upper cover plate are sequentially arranged on the bottom plate from bottom to top;

[0009] The long side positioning mechanism is arranged on the bottom plate and is used to simultaneously abut against the outer side wall on one side of the long side of the frame, the long side of the upper cover plate and the long side of the lower cover plate;

[0010] The short side positioning mechanism is arranged on the bottom plate and is used to simultaneously abut against the outer side wall on one side of the short side of the frame, the short side of the upper cover plate and the short side of the lower cover plate;

[0011] The welding mechanism is arranged on one side of the bottom plate, and is used for welding between the upper cover plate and the frame, and between the lower cover plate and the frame.

[0012] Optionally, the long side positioning mechanism includes a long side fixing component and a long side movable component, and the frame has a first long side side wall and a second long side side wall opposite to each other;

[0013] The long side fixing assembly is fixedly disposed on one side of the first long side wall, and abuts against the first long side wall, one long side of the upper cover plate, and one long side of the lower cover plate;

[0014] The long side movable component is movably disposed on one side of the second long side wall, and is used to abut against the second long side wall, the other long side of the upper cover plate, and the other long side of the lower cover plate.

[0015] Optionally, the long side movable component includes a first cylinder and a first positioning member, the first cylinder is arranged on the base plate, the piston rod of the first cylinder is connected to the first positioning member, and the first positioning member is used to abut the second long side side wall, the other long side of the upper cover plate and the other long side of the lower cover plate.

[0016] Optionally, a first limiting member is provided on the bottom plate, a first positioning portion is provided on the first positioning member, and the first positioning member abuts against the second long side wall, the other long side of the upper cover plate and the other long side of the lower cover plate when the first positioning portion abuts against the limiting member.

[0017] Optionally, the short side positioning mechanism comprises a short side fixing component and a short side movable component, and the frame has a first short side side wall and a second short side side wall opposite to each other;

[0018] The short side fixing assembly is fixedly disposed on one side of the first short side wall, and abuts against the first short side wall, one short side of the upper cover plate, and one short side of the lower cover plate;

[0019] The short side movable component is movably disposed on one side of the second short side wall, and is used to abut against the second short side wall, the other short side of the upper cover plate, and the other short side of the lower cover plate.

[0020] Optionally, the short side movable assembly includes a second cylinder and a second positioning member, the second cylinder is arranged on the base plate, the piston rod of the second cylinder is connected to the second positioning member, and the second positioning member is used to abut the second short side side wall, the other short side of the upper cover plate and the other short side of the lower cover plate.

[0021] Optionally, a second limiting member is provided on the second cylinder, and the second positioning member abuts against the second short side wall, the other short side of the upper cover plate and the other short side of the lower cover plate under the abutting action of the second limiting member.

[0022] Optionally, it further includes a top plate, a pressing assembly and a fillet adjustment assembly, wherein the top plate is arranged on the top of the upper cover plate and fits the upper cover plate;

[0023] The pressing assembly is arranged on the bottom plate and is used to press the top plate and the upper cover plate;

[0024] The rounded corner adjustment component is movably disposed on the bottom plate and is used to adjust the corners of the frame.

[0025] Optionally, a suction cup assembly is further included. Both the long side positioning mechanism and the short side positioning mechanism are provided with a suction cup assembly, and the suction cup assembly is used to suck the frame tightly.

[0026] An embodiment of the present invention further provides a welding method, which is applied to the above-mentioned battery welding device, wherein the battery welding device further comprises a top plate, a clamping assembly and a flipping mechanism, wherein the clamping assembly is arranged on the bottom plate, and the flipping mechanism is arranged on one side of the bottom plate and connected to the bottom plate, and is used to drive the bottom plate to flip; the welding method comprises:

[0027] Placing the lower cover plate, the frame and the upper cover plate on the bottom plate in sequence;

[0028] The long side positioning mechanism and the short side positioning mechanism are used to abut against the frame, the lower cover plate and the upper cover plate;

[0029] Using a pressing assembly to press the top plate and the upper cover plate;

[0030] Using the welding mechanism to weld the upper cover plate and the frame;

[0031] Using the flipping mechanism to flip the bottom plate so that its bottom surface faces upward;

[0032] Pre-welding the lower cover plate and the frame using the welding mechanism;

[0033] Using the flipping mechanism to flip the bottom plate so that its top surface faces upward;

[0034] The upper cover plate, the lower cover plate and the frame that are welded together are taken out, and the lower cover plate and the frame are welded again using the welding mechanism.

[0035] The beneficial effects of the battery welding device and welding method of the embodiments of the present invention include, for example: in the process of welding the cover plate and the frame, the lower cover plate, the frame and the upper cover plate are first stacked on the bottom plate from bottom to top in sequence, and then the long side positioning mechanism is used to simultaneously abut the outer wall on one side of the long side of the frame, the long side of the upper cover plate and the long side of the lower cover plate, and the short side positioning mechanism is used to simultaneously abut the outer wall on one side of the short side of the frame, the short side of the upper cover plate and the short side of the lower cover plate, so that the frame, the lower cover plate and the upper cover plate are positioned all around, and then the welding mechanism is used to weld the upper cover plate and the frame, and the lower cover plate and the frame respectively; by positioning first and then welding, the cover plate and the frame are not easy to be misaligned, which improves the welding consistency, and also improves the assembly and operation efficiency, and is not easy to cause problems such as cold welding, bursting points, and poor welding sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a schematic diagram of the structure of a battery welding device in an embodiment of the present application;

[0038] Figure 2 This is a schematic diagram of the structure of the upper cover plate, the lower cover plate and the frame in the embodiment of the present application;

[0039] Figure 3 This is a schematic diagram of the structure of the long side movable assembly in the embodiment of the present application;

[0040] Figure 4 This is a schematic diagram of the structure of the first position-limiting member in the embodiment of the present application;

[0041] Figure 5 This is a schematic diagram of the structure of the short side movable assembly in the embodiment of the present application;

[0042] Figure 6 This is a schematic diagram of the structure of the clamping assembly in the embodiment of the present application;

[0043] Figure 7 This is a schematic diagram of the structure of the fillet adjustment component in the embodiment of the present application;

[0044] Figure 8 This is a schematic diagram of the structure of the control valve in the embodiment of the present application;

[0045] Fig. 9 This is a schematic diagram for showing the top surface of the bottom plate in an embodiment of the present application;

[0046] Fig.10 This is a schematic diagram for showing the bottom surface of the base plate in an embodiment of the present application;

[0047] Fig.11 This is a schematic diagram of the structure of the debugging standard block in the embodiment of the present application.

[0048] Icon: 10-Battery welding device;

[0049] 100-bottom plate; 110-first stopper; 111-first stopper; 120-slideway; 130-groove; 140-through hole; 150-pole positioning member; 160-control valve; 170-debugging standard block;

[0050] 200-upper cover;

[0051] 300-lower cover;

[0052] 400-frame; 410-first long side wall; 420-second long side wall; 430-first short side wall; 440-second short side wall;

[0053] 500-long side positioning mechanism; 510-long side fixing assembly; 520-long side movable assembly; 521-first cylinder; 522-first positioning member; 5221-first positioning portion;

[0054] 600-short side positioning mechanism; 610-short side fixing assembly; 620-short side movable assembly; 621-second cylinder; 6211-second limiting member; 622-second positioning member;

[0055] 700-top plate; 710-top plate body; 720-extension plate;

[0056] 800-pressing assembly; 810-third cylinder; 820-pressing member;

[0057] 900- fillet adjustment assembly; 910- sliding block; 911- recessed portion; 920- positioning bolt. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0059] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0061] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0063] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0064] The inventor of the present application has found that currently the upper and lower cover plates and the frame are positioned manually, which results in easy misalignment of the cover plate and the frame, poor welding consistency, low assembly and operation efficiency, and easy problems such as cold welding, cracking points, and poor welding sealing. This embodiment provides a battery welding device to solve the above technical problems.

[0065] Please refer to Figure 1-Figure 3 The present embodiment provides a battery welding device 10, i.e., a welding device 10 for a battery. The battery includes an upper cover plate 200, a lower cover plate 300, and a frame 400. The welding device 10 includes a bottom plate 100, a long side positioning mechanism 500, a short side positioning mechanism 600, and a welding mechanism (not shown in the figure); the lower cover plate 300, the frame 400, and the upper cover plate 200 are sequentially arranged on the bottom plate 100 from bottom to top; the long side positioning mechanism 500 is arranged on the bottom plate 100 The short side positioning mechanism 600 is arranged on the bottom plate 100, and is used to simultaneously abut the outer wall on one side of the long side of the frame 400, the long side of the upper cover plate 200 and the long side of the lower cover plate 300; the short side positioning mechanism 600 is arranged on the bottom plate 100, and is used to simultaneously abut the outer wall on one side of the short side of the frame 400, the short side of the upper cover plate 200 and the short side of the lower cover plate 300; the welding mechanism is arranged on one side of the bottom plate 100, and is used to weld the upper cover plate 200 and the frame 400, as well as the lower cover plate 300 and the frame 400.

[0066] In this embodiment, the upper cover plate 200 and the lower cover plate 300 are both rectangular cover plates, and the frame 400 is a rectangular frame; the lower cover plate 300, the frame 400 and the upper cover plate 200 are arranged in the middle of the bottom plate 100, and the lower cover plate 300, the frame 400 and the upper cover plate 200 are sequentially stacked on the bottom plate 100 from bottom to top, and the lower cover plate 300, the frame 400 and the upper cover plate 200 can be placed on the bottom plate 100 by, for example, a lifting mechanism including a cylinder (not shown in the figure), or can be placed on the bottom plate 100 manually. The long side positioning mechanism 500 and the short side positioning mechanism 600 are arranged on the outside of the frame 400, and the welding mechanism can be a laser welding machine.

[0067] In the process of welding the cover plate and the frame 400, the lower cover plate 300, the frame 400 and the upper cover plate 200 are first stacked on the bottom plate 100 from bottom to top, and then the long side positioning mechanism 500 is used to simultaneously abut the outer side wall of the long side of the frame 400, the long side of the upper cover plate 200 and the long side of the lower cover plate 300, and the short side positioning mechanism 600 is used to simultaneously abut the outer side wall of the short side of the frame 400, the short side of the upper cover plate 200 and the short side of the lower cover plate 300, so as to weld the cover plate 300 and the frame 400. The frame 400, the lower cover plate 300 and the upper cover plate 200 are positioned all around, and then the laser welding machine is used to weld the upper cover plate 200 and the frame 400, and the lower cover plate 300 and the frame 400 respectively; by positioning first and then welding, the upper cover plate 200 and the frame 400 are not easy to be misaligned, and the lower cover plate 300 and the frame 400 are not easy to be misaligned, which improves the welding consistency, and also improves the assembly and operation efficiency, and is not easy to cause problems such as cold welding, burst points, and poor welding sealing.

[0068] Furthermore, the long side positioning mechanism 500 includes a long side fixing component 510 and a long side movable component 520, and the frame 400 has a first long side side wall 410 and a second long side side wall 420 relative to each other; the long side fixing component 510 is fixedly arranged on one side of the first long side side wall 410, and abuts against the first long side side wall 410, one long side of the upper cover plate 200 and one long side of the lower cover plate 300; the long side movable component 520 is movably arranged on one side of the second long side side wall 420, and is used to abut against the second long side side wall 420, the other long side of the upper cover plate 200 and the other long side of the lower cover plate 300.

[0069] In this embodiment, the long side fixing component 510 is fixedly disposed on the base plate 100, and always abuts against the first long side side wall 410, one long side of the upper cover plate 200, and one long side of the lower cover plate 300; the long side movable component 520 is movably disposed on the base plate 100, and the moving direction of the long side movable component 520 is the direction of approaching or moving away from the long side fixing component 510.

[0070] In the process of positioning the long side wall of the frame 400, the long side of the upper cover 200 and the long side of the lower cover 300, firstly, the first long side wall 410 of the frame 400, one long side of the upper cover 200 and one long side of the lower cover 300 are abutted against the long side fixing component 510; then the long side movable component 520 is moved so that the long side movable component 520 is abutted against the second long side wall 420 of the frame 400, the other long side of the upper cover 200 and the other long side of the lower cover 300 at the same time. The long side fixing component 510 and the long side movable component 520 cooperate to position the long side walls of the frame 400, the long sides of the upper cover 200 and the long sides of the lower cover 300, so that the first long side wall 410 of the frame 400, one long side of the upper cover 200 and one long side of the lower cover 300 are located on the same straight line, and the second long side wall 420 of the frame 400, the other long side of the upper cover 200 and the other long side of the lower cover 300 are located on the same straight line, thereby facilitating welding.

[0071] Furthermore, the long side movable component 520 includes a first cylinder 521 and a first positioning member 522. The first cylinder 521 is arranged on the base plate 100. The piston rod of the first cylinder 521 is connected to the first positioning member 522. The first positioning member 522 is used to abut the second long side side wall 420, the other long side of the upper cover plate 200 and the other long side of the lower cover plate 300.

[0072] In this embodiment, the number of long side movable components 520 includes multiple, and the multiple long side movable components 520 are arranged in sequence along the length direction of the frame 400. The number of long side fixed components 510 also includes multiple, and the multiple long side fixed components 510 are arranged in sequence along the length direction of the frame 400; wherein, multiple first cylinders 521 are all fixed on the base plate 100, and the end of the piston rod of the first cylinder 521 is connected to the corresponding first positioning member 522, and the movable direction of the piston rod of the first cylinder 521 is the direction close to or away from the long side fixed component 510.

[0073] By setting up multiple long side movable components 520 and multiple long side fixed components 510, multiple long side fixed components 510 are simultaneously abutted against the first long side side wall 410, one long side of the upper cover 200 and one long side of the lower cover 300, and multiple first cylinders 521 drive the corresponding first positioning components 522 to move until the multiple first positioning components 522 are abutted against the second long side side wall 420, the other long side of the upper cover 200 and the other long side of the lower cover 300, thereby positioning the long side side walls of the frame 400, the long sides of the upper cover 200 and the long sides of the lower cover 300.

[0074] For further information, see Figure 4A first limiting member 110 is provided on the bottom plate 100, and a first positioning portion 5221 is provided on the first positioning member 522. The first positioning member 522 abuts against the second long side wall 420, the other long side of the upper cover plate 200 and the other long side of the lower cover plate 300 when the first positioning portion 5221 abuts against the first limiting member 110.

[0075] In this embodiment, the first limiting member 110 is arranged between the base plate 100 and the first positioning member 522. The number of the first limiting members 110 includes multiple, and the multiple first limiting members 110 correspond one-to-one to the multiple first positioning members 522; the first limiting member 110 includes a first limiting portion 111, and the first positioning portion 5221 abuts against the first limiting portion 111 when the first positioning member 522 abuts against the second long side wall 420, the other long side of the upper cover 200 and the other long side of the lower cover 300, thereby synchronously limiting the multiple first positioning members 522, so that the multiple first positioning members 522 remain in the same straight line when extended, thereby also ensuring that the second long side wall 420, the other long side of the upper cover 200 and the other long side of the lower cover 300 are located in the same straight line.

[0076] Furthermore, the short side positioning mechanism 600 includes a short side fixing component 610 and a short side movable component 620, and the frame 400 has a first short side wall 430 and a second short side wall 440 relative to each other; the short side fixing component 610 is fixedly arranged on one side of the first short side wall 430, and abuts against the first short side wall 430, one short side of the upper cover 200 and one short side of the lower cover 300; the short side movable component 620 is movably arranged on one side of the second short side wall 440, and is used to abut against the second short side wall 440, the other short side of the upper cover 200 and the other short side of the lower cover 300.

[0077] In this embodiment, the short side fixing component 610 is fixedly disposed on the base plate 100 and always abuts against the first short side side wall 430, one short side of the upper cover plate 200 and one short side of the lower cover plate 300; the short side movable component 620 is movably disposed on the base plate 100, and the moving direction of the short side movable component 620 is the direction of approaching or moving away from the short side fixing component 610.

[0078] In the process of positioning the short side wall of the frame 400, the short side of the upper cover 200 and the short side of the lower cover 300, firstly, the first short side wall 430 of the frame 400, one short side of the upper cover 200 and one short side of the lower cover 300 are abutted against the short side fixing component 610; then the short side movable component 620 is moved so that the short side movable component 620 is simultaneously abutted against the second short side wall 440, the other short side of the upper cover 200 and the other short side of the lower cover 300, and the short side fixing component 610 is moved. The fixed component 610 and the short side movable component 620 cooperate to position the short side walls of the frame 400, the short sides of the upper cover 200 and the short sides of the lower cover 300, so that the first short side wall 430 of the frame 400, one short side of the upper cover 200 and one short side of the lower cover 300 are located on the same straight line, and the second short side wall 440 of the frame 400, the other short side of the upper cover 200 and the other short side of the lower cover 300 are located on the same straight line, thereby facilitating welding.

[0079] For further information, see Figure 5 The short side movable assembly 620 includes a second cylinder 621 and a second positioning member 622. The second cylinder 621 is arranged on the base plate 100. The piston rod of the second cylinder 621 is connected to the second positioning member 622. The second positioning member 622 is used to abut the second short side side wall 440, the other short side of the upper cover plate 200 and the other short side of the lower cover plate 300.

[0080] In this embodiment, the second cylinder 621 is fixed on the base plate 100 , the end of the piston rod of the second cylinder 621 is connected to the second positioning member 622 , and the movable direction of the piston rod of the second cylinder 621 is the direction approaching or moving away from the short side fixing assembly 610 .

[0081] The short side fixing assembly 610 is used to simultaneously abut against the first short side wall 430, one short side of the upper cover 200 and one short side of the lower cover 300, and the second cylinder 621 drives the second positioning member 622 to move until the second positioning member 622 abuts against the second short side wall 440, the other short side of the upper cover 200 and the other short side of the lower cover 300, thereby positioning the short side wall of the frame 400, the short side of the upper cover 200 and the short side of the lower cover 300.

[0082] Furthermore, a second limiting member 6211 is provided on the second cylinder 621 , and the second positioning member 622 abuts against the second short side wall 440 , the other short side of the upper cover plate 200 and the other short side of the lower cover plate 300 under the abutting action of the second limiting member 6211 .

[0083] In this embodiment, the second cylinder 621 is a sliding cylinder, the second limit member 6211 is arranged on the sliding cylinder, the second limit member 6211 is a limit screw, and the second positioning member 622 abuts against the second short side wall 440, the other short side of the upper cover plate 200 and the other short side of the lower cover plate 300 when the sliding table of the sliding cylinder itself abuts against the limit screw, thereby limiting the moving distance of the second positioning member 622, so that when the second positioning member 622 is extended, it just abuts against the second short side wall 440, the other short side of the upper cover plate 200 and the other short side of the lower cover plate 300 at the same time, ensuring that the second short side wall 440, the other short side of the upper cover plate 200 and the other short side of the lower cover plate 300 are located on the same straight line.

[0084] In addition, the welding device 10 also includes a top plate 700, a clamping assembly 800 and a rounded corner adjustment assembly 900. The top plate 700 is arranged on the top of the upper cover plate 200 and is attached to the upper cover plate 200; the clamping assembly 800 is arranged on the bottom plate 100 and is used to clamp the top plate 700 and the upper cover plate 200; the rounded corner adjustment assembly 900 is movably arranged on the bottom plate 100 and is used to adjust the corners of the frame 400.

[0085] In this embodiment, after the lower cover plate 300, the frame 400, and the upper cover plate 200 are positioned by using the long side positioning mechanism 500 and the short side positioning mechanism 600, the top plate 700 is placed on the upper cover plate 200 to press the lower cover plate 300, the frame 400, and the upper cover plate 200 together; the top plate 700 includes a top plate body 710 and a plurality of extension plates 720, the top plate body 710 is roughly a rectangular plate, the plurality of extension plates 720 are all connected to the top plate body 710, and the length direction of the extension plate 720 is perpendicular to the length direction of the top plate body 710; the number of clamping assemblies 800 includes a plurality, and the number of clamping assemblies 800 is twice the number of extension plates 720, for example, when the number of extension plates 720 is three, the number of clamping assemblies 800 is six; every two clamping assemblies 800 correspond to one extension plate 720, and are located at both ends of the extension plate 720.

[0086] After using the top plate 700 to press the lower cover plate 300, the frame 400, and the upper cover plate 200, multiple pressing components 800 are used to press the two ends of the extension plate 720 to further strengthen the pressing force of the top plate 700 on the lower cover plate 300, the frame 400, and the upper cover plate 200, so that the lower cover plate 300, the frame 400, and the upper cover plate 200 are not easily misaligned.

[0087] For further information, see Figure 6The clamping assembly 800 includes a third cylinder 810 and a clamping piece 820. The third cylinder 810 is a rotary pressing cylinder. The piston rod of the rotary pressing cylinder can move vertically and rotate. The end of the piston rod of the rotary pressing cylinder is connected to the clamping piece 820. After the top plate 700 is used to press the lower cover plate 300, the frame 400, and the upper cover plate 200, the third cylinder 810 is used to drive the clamping piece 820 to rise and fall and rotate until the clamping piece 820 is pressed on the corresponding extension plate 720, thereby pressing the top plate 700.

[0088] See also Figure 7 The fillet adjustment component 900 includes a sliding block 910 and a positioning bolt 920. The number of the sliding blocks 910 includes four, and the four sliding blocks 910 are movably arranged at the four corners of the frame 400; four sliding grooves 120 are opened on the bottom plate 100, and the four sliding grooves 120 correspond to the four sliding blocks 910 respectively. The sliding block 910 is movably arranged in the sliding groove 120, and a plurality of positioning holes are opened on the inner bottom wall of the sliding groove 120. A waist-shaped hole is opened on the sliding block 910, and the positioning bolt 920 is passed through the waist-shaped hole and is used to cooperate with the corresponding positioning hole to position the sliding block 910; a recessed portion 911 is provided on the side of the sliding block 910 facing the frame 400, and the surface of the recessed portion 911 is an arc surface, which is used to fit the surface of the corner of the frame 400.

[0089] When the rounded corners of the frame 400 need to be adjusted, the sliding block 910 is moved so that the arc surface of the recessed portion 911 fits with the corresponding corner of the frame 400 , thereby adjusting the rounded corners of the frame 400 .

[0090] In addition, a battery cell is arranged in the space enclosed by the frame 400, the lower cover plate 300, and the upper cover plate 200. The battery cell has positive and negative poles, and the positive and negative poles pass through the first long side wall 410 of the frame 400 and extend outward; accordingly, the battery welding device 10 also includes a pole positioning member 150, and the number of the pole positioning members 150 includes two, corresponding to the positive and negative poles of the battery respectively, and the two pole positioning members 150 are fixed on the base plate 100 and always abut against the corresponding positive and negative poles to position the positive and negative poles.

[0091] In addition, the battery welding device 10 further includes a suction cup assembly, which is disposed on both the long side positioning mechanism 500 and the short side positioning mechanism 600 , and is used to suck the frame 400 .

[0092] After the frame 400 , the upper cover plate 200 and the lower cover plate 300 are positioned by using the long side positioning mechanism 500 and the short side positioning mechanism 600 , the frame 400 is sucked tightly by the suction cup assembly, thereby further enhancing the positioning effect.

[0093] For further information, see Figure 8 The suction cup assembly includes a suction cup, a control valve 160 and an air pump, wherein the control valve 160 is connected between the suction cup and the vacuum pump; one or more suction cups are arranged on the side walls of the long side fixing assembly 510, the short side fixing assembly 610, the first positioning member 522, the second positioning member 622, and the pole positioning member 150 facing the frame 400; the number of the control valves 160 includes multiple ones, which are respectively used to control the tightening and loosening of the suction cups on the first positioning member 522 and the second positioning member 622, the tightening and loosening of the suction cups on the long side fixing assembly 510, the short side fixing assembly 610 and the pole positioning member 150, the movement of the first cylinder 521, the movement of the second cylinder 621, and the movement of the third cylinder 810.

[0094] Also, see Fig. 9 A groove 130 is provided on the top surface of the bottom plate 100, and the function of the groove 130 is equivalent to a suction cup. A plurality of suction holes are provided on the inner bottom wall of the groove 130, and an exhaust hole is provided on the side wall of the bottom plate 100. The plurality of suction holes are connected with the exhaust holes, and a control valve 160 is provided to be connected with the exhaust holes. A negative pressure is drawn into the groove 130 through an exhaust pump. When the lower cover plate 300 is placed on the bottom plate 100, the lower cover plate 300 can be sucked tightly onto the bottom plate 100, which is convenient for positioning the lower cover plate 300.

[0095] It should be noted that the control valve 160 may be a manual valve or a solenoid valve, and the air extraction pump may be a vacuum pump.

[0096] In addition, the battery welding device 10 further includes a flipping mechanism (not shown in the figure), which includes a servo motor, and the flipping mechanism is connected to the bottom plate 100 via the servo motor; Fig.10 The bottom surface of the bottom plate 100 is provided with a plurality of through holes 140 on a circumferential path of the frame 400 .

[0097] After welding the upper cover plate 200 and the frame 400, the bottom plate 100 is flipped 180 degrees using a flipping mechanism so that the bottom surface of the bottom plate 100 faces upward, and then the lower cover plate 300 and the frame 400 are welded. Since the laser welding machine welds the lower cover plate 300 and the frame 400 through the through hole 140, the first welding of the lower cover plate 300 and the frame 400 is pre-welding.

[0098] Also, see Fig.11 The battery welding device 10 also includes a debugging standard block 170, which has a shape roughly the same as that of the battery. Before welding the battery frame 400, the upper cover plate 200 and the lower cover plate 300, the debugging standard block 170 is first set on the bottom plate 100 to debug and position the long side positioning mechanism 500, the short side positioning mechanism 600, the fillet adjustment mechanism, etc.

[0099] This embodiment also provides a welding method, which is applied to the above-mentioned battery welding device 10, and the welding method includes the following steps:

[0100] S1. Place the lower cover plate 300, the frame 400 and the upper cover plate 200 on the bottom plate 100 in sequence.

[0101] S2 . Use the long side positioning mechanism 500 and the short side positioning mechanism 600 to abut against the frame 400 , the lower cover plate 300 and the upper cover plate 200 .

[0102] S3. Use the pressing assembly 800 to press the top plate 700 and the upper cover plate 200 together.

[0103] S4. Use a welding mechanism to weld the upper cover plate 200 and the frame 400.

[0104] S5. Use the flipping mechanism to flip the bottom plate 100 so that its bottom surface faces upward.

[0105] S6. Pre-weld the lower cover plate 300 and the frame 400 using a welding mechanism.

[0106] S7, using the flipping mechanism to flip the bottom plate 100 so that its top surface faces upward.

[0107] S8, taking out the upper cover plate 200, the lower cover plate 300 and the frame 400 that are welded together, and using a welding mechanism to weld the lower cover plate 300 and the frame 400 again.

[0108] The beneficial effects of the welding method are substantially the same as those of the above-mentioned battery welding device 10 , and will not be described in detail herein.

[0109] In summary, the embodiment of the present invention provides a battery welding device 10 and a welding method. In the process of welding the frame 400, the upper cover plate 200 and the lower cover plate 300, the lower cover plate 300 is first placed on the bottom plate 100 and the lower cover plate 300 is sucked on the bottom plate 100, and then the frame 400 and the upper cover plate 200 are placed on the lower cover plate 300 in sequence, and then the long side positioning mechanism 500 and the short side positioning mechanism 600 are used to abut the frame 400, the lower cover plate 300 and the upper cover plate 200, and the side wall of the frame 400 is sucked, so that the long sides and short sides of the frame 400, the lower cover plate 300 and the upper cover plate 200 are The edges are flush with each other; then the clamping assembly 800 is used to press the top plate 700 onto the upper cover plate 200, and then the upper cover plate 200 and the frame 400 are welded by the welding mechanism; the bottom plate 100 is then turned over by the flipping mechanism so that its bottom surface faces upward, and the lower cover plate 300 and the frame 400 are pre-welded by the welding mechanism; the bottom plate 100 is then turned over by the flipping mechanism so that its top surface faces upward, and finally the upper cover plate 200, the lower cover plate 300 and the frame 400 that are welded together are removed, and the lower cover plate 300 and the frame 400 are welded for the second time by the welding mechanism to complete the welding of the cover plate and the frame 400.

[0110] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A battery welding device, wherein the battery comprises a frame, an upper cover plate and a lower cover plate, characterized in that: The welding device comprises a base plate, a long side positioning mechanism, a short side positioning mechanism and a welding mechanism; The lower cover plate, the frame and the upper cover plate are sequentially arranged on the bottom plate from bottom to top; The long side positioning mechanism is arranged on the bottom plate and is used to simultaneously abut against the outer side wall on one side of the long side of the frame, the long side of the upper cover plate and the long side of the lower cover plate; The short side positioning mechanism is arranged on the bottom plate and is used to simultaneously abut against the outer side wall on one side of the short side of the frame, the short side of the upper cover plate and the short side of the lower cover plate; The welding mechanism is arranged on one side of the bottom plate, and is used for welding between the upper cover plate and the frame, and between the lower cover plate and the frame; The welding device further comprises a flipping mechanism for flipping the bottom plate, the flipping mechanism is connected to the bottom plate, a plurality of through holes are opened on the bottom surface of the bottom plate on the circumferential path of the frame, and the welding mechanism is used to weld the lower cover plate and the frame through the through holes; The welding device further comprises a top plate, a pressing assembly and a fillet adjustment assembly, wherein the top plate is arranged on the top of the upper cover plate and is attached to the upper cover plate; The pressing assembly is arranged on the bottom plate and is used to press the top plate and the upper cover plate; The rounded corner adjustment component is movably disposed on the bottom plate and is used to adjust the corners of the frame; The long side positioning mechanism comprises a long side fixing component and a long side movable component, and the frame comprises a first long side side wall and a second long side side wall opposite to each other; The long side fixing assembly is fixedly disposed on one side of the first long side wall, and abuts against the first long side wall, one long side of the upper cover plate, and one long side of the lower cover plate; The long side movable component is movably arranged on one side of the second long side side wall, and is used to abut against the second long side side wall, the other long side of the upper cover plate, and the other long side of the lower cover plate; The long side movable assembly includes a first cylinder and a first positioning member, wherein the first cylinder is disposed on the bottom plate, a piston rod of the first cylinder is connected to the first positioning member, and the first positioning member is used to abut against the second long side wall, the other long side of the upper cover plate, and the other long side of the lower cover plate; A first limiting member is provided on the bottom plate, a first positioning portion is provided on the first positioning member, and the first positioning member abuts against the second long side wall, the other long side of the upper cover plate and the other long side of the lower cover plate when the first positioning portion abuts against the first limiting member; There are plural first positioning members and plural first limiting members, and the plural first positioning members correspond to the plural first limiting members one by one.

2. The battery welding device according to claim 1, characterized in that: The short side positioning mechanism comprises a short side fixing component and a short side movable component, and the frame comprises a first short side side wall and a second short side side wall opposite to each other; The short side fixing assembly is fixedly disposed on one side of the first short side wall, and abuts against the first short side wall, one short side of the upper cover plate, and one short side of the lower cover plate; The short side movable component is movably disposed on one side of the second short side wall, and is used to abut against the second short side wall, the other short side of the upper cover plate, and the other short side of the lower cover plate.

3. The battery welding device according to claim 2, characterized in that: The short side movable assembly includes a second cylinder and a second positioning member, the second cylinder is arranged on the base plate, the piston rod of the second cylinder is connected to the second positioning member, and the second positioning member is used to abut the second short side side wall, the other short side of the upper cover plate and the other short side of the lower cover plate.

4. The battery welding device according to claim 3, characterized in that: The second cylinder is provided with a second limiting member, and the second positioning member abuts against the second short side wall, the other short side of the upper cover plate and the other short side of the lower cover plate under the abutting action of the second limiting member.

5. The battery welding device according to claim 1, characterized in that: It also includes a suction cup assembly. Both the long side positioning mechanism and the short side positioning mechanism are provided with a suction cup assembly, and the suction cup assembly is used to suck the frame tightly.

6. A welding method, characterized in that: Applicable to the battery welding device according to any one of claims 1 to 5, the welding device further comprises a top plate, a clamping assembly and a flipping mechanism, the clamping assembly is arranged on the bottom plate, the flipping mechanism is arranged on one side of the bottom plate and connected to the bottom plate, and is used to drive the bottom plate to flip; The welding method comprises: Placing the lower cover plate, the frame and the upper cover plate on the bottom plate in sequence; The long side positioning mechanism and the short side positioning mechanism are used to abut against the frame, the lower cover plate and the upper cover plate; Using a pressing assembly to press the top plate and the upper cover plate; Using the welding mechanism to weld the upper cover plate and the frame; Using the flipping mechanism to flip the bottom plate so that its bottom surface faces upward; Pre-welding the lower cover plate and the frame using the welding mechanism; Using the flipping mechanism to flip the bottom plate so that its top surface faces upward; The upper cover plate, the lower cover plate and the frame that are welded together are taken out, and the lower cover plate and the frame are welded again using the welding mechanism.

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