An automatic spot welding device for a stentless battery pack

Abstract

The present invention relates to an automatic spot welding device for a bracketless battery pack, which includes a spot welding jig for loading the battery pack, a jig assembly line for transporting the spot welding jig, an upper spot welding mechanism for welding nickel sheets on the upper end face of the battery pack, a spot welding flipping mechanism for flipping the spot welding jig, a lower spot welding mechanism for welding nickel sheets on the lower end face of the battery pack, a jig disassembly and reflux mechanism for disassembling the reflux spot welding jig, and a blanking mechanism. The spot welding jig includes an upper hinge and a lower hinge, and the upper hinge and the lower hinge are buckled up and down to clamp and fix the battery pack and the nickel sheet, and through holes are dug in the upper hinge and the lower hinge. The present invention provides an automatic spot welding device for a bracketless battery pack, which realizes the automation of spot welding of the battery pack and the nickel sheet. After welding, the hinge refluxes, the product is blanked, and the processing process continues to develop efficiently and stably.

Description

Technical Field

[0001] The present invention relates to the field of battery pack production and processing, and particularly to an automatic spot welding device for a bracketless battery pack. Background Art

[0002] Currently in China, the development of production equipment automation is in the process from scratch. At present, the automation equipment mainly utilizes the equipment in the original production line of the factory as much as possible to save enterprise costs. Therefore, the current automation equipment should be more in line with non-customization and generalization in order to better adapt to the current production and processing of enterprises. In the production and processing technology of batteries, nickel sheets need to be welded on the end faces of battery packs. However, the overall structure of the existing negative electrode welding and processing production line is huge, occupying a large production space. At the same time, the connection between each processing station is not continuous, which easily affects production efficiency and production quality, thus reducing the overall battery production quality. Summary of the Invention

[0003] In view of this, the present invention provides an automatic spot welding device for a bracketless battery pack, realizing the automation of spot welding between the battery pack and the nickel sheet. After welding is completed, the hinge returns, the product is unloaded, and the processing procedures continue to be carried out efficiently and stably.

[0004] The object of the present invention is achieved through the following technical solutions:

[0005] An automatic spot welding device for a bracketless battery pack includes a spot welding jig for loading the battery pack, a jig assembly line for transporting the spot welding jig, an upper spot welding mechanism for welding nickel sheets on the upper end face of the battery pack, a spot welding flipping mechanism for flipping the spot welding jig, a lower spot welding mechanism for welding nickel sheets on the lower end face of the battery pack, a jig disassembly and reflux mechanism for disassembling and refluxing the spot welding jig, and a blanking mechanism. The spot welding jig includes an upper hinge and a lower hinge, and the upper hinge and the lower hinge are buckled up and down to clamp and fix the battery pack and the nickel sheet, and through holes are dug in the upper hinge and the lower hinge.

[0006] Preferably, the upper spot welding mechanism includes an upper spot welding head for welding the nickel sheet on the upper end face of the battery pack, a first X moving axis, a first Y moving axis, a first Z moving axis, and a first R moving axis for driving the upper spot welding head to move and making the upper spot welding head extend into the through hole and align with the nickel sheet to be welded.

[0007] Preferably, the spot welding flipping mechanism includes a first blocking component for blocking the spot welding jig flowing in the jig assembly line, a flipping component for flipping the spot welding jig blocked by the first blocking component, and a positioning component for sending the spot welding jig blocked by the first blocking component to the flipping component.

[0008] Preferably, the first blocking component is a blocking cylinder arranged on the fixture assembly line. After the push rod of the blocking cylinder extends out, it can block the spot welding fixture flowing on the fixture assembly line.

[0009] Preferably, the flipping component includes a flipping bracket, a flipping motor installed on the flipping bracket, a flipping clamping head driven by the flipping motor to rotate, and an auxiliary clamping head that rotates with the rotation of the flipping clamping head. The flipping clamping head and the auxiliary clamping head respectively clamp the spot welding fixture from both sides of the spot welding fixture.

[0010] Preferably, the positioning component includes a positioning cylinder arranged on the fixture assembly line. The end of the push rod of the positioning cylinder is connected with a positioning plate, and the positioning plate is used to send the spot welding fixture blocked by the first blocking component to the flipping clamping head.

[0011] Preferably, the lower spot welding mechanism includes a lower spot welding head for welding the nickel sheet to the lower end face of the battery pack, a second X moving axis, a second Y moving axis, a second Z moving axis, and a second R moving axis that drive the lower spot welding head to move and make the lower spot welding head extend into the through hole and align with the nickel sheet to be welded.

[0012] Preferably, the fixture disassembly and return mechanism includes a second blocking component for blocking the spot welding fixture flowing on the fixture assembly line and a disassembly and return mechanism for disassembling the spot welding fixture.

[0013] Preferably, the second blocking component is a blocking cylinder arranged on the fixture assembly line. After the push rod of the blocking cylinder extends out, it can block the spot welding fixture flowing on the fixture assembly line.

[0014] Preferably, the disassembly and return mechanism includes a disassembly bracket, a slide rail arranged on the disassembly bracket, a sliding plate sliding on the slide rail, a lifting cylinder arranged on the sliding plate, a lifting plate connected to the push rod of the lifting cylinder, a battery pack pressing cylinder installed on the lifting plate, a flipping chuck installed on the lifting plate, a flipping cylinder for driving the flipping chuck to rotate, an auxiliary chuck that rotates with the rotation of the flipping chuck, and a hinge return line arranged beside the fixture assembly line. The flipping chuck and the auxiliary chuck respectively clamp the lower hinge from both sides of the lower hinge. The battery pack pressing cylinder has a plurality of push rods, and the push rods pass through the through holes and press against the end face of the battery pack.

[0015] The beneficial effects of the present invention compared with the prior art are:

[0016] The stentless battery pack automatic spot welding equipment of the present invention realizes the automation of spot welding between the battery pack and the nickel sheet. After welding is completed, the hinge returns, the product is unloaded, and the processing process continues efficiently and stably. Compared with the prior art, the advantages of the present invention are as follows: 1. The equipment has good applicability, realizes the automatic spot welding of stentless battery packs, and similar battery packs can use this structure to achieve automatic production. 2. It can effectively improve the product quality. By realizing automatic spot welding through the equipment, the consistency of the product can be improved and the production efficiency can be increased. 3. The equipment structure layout is compact, utilizes line body reflux, and effectively utilizes space; the equipment can be connected to a fully automatic production line or spliced with a manual line body for semi-automatic operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the stentless battery pack automatic spot welding equipment in an embodiment of the present invention.

[0018] Figure 2 It is a structural diagram of the spot welding jig in an embodiment of the present invention.

[0019] Figure 3 It is a structural diagram of the upper spot welding mechanism in an embodiment of the present invention.

[0020] Figure 4 It is a structural diagram of the spot welding flipping mechanism in an embodiment of the present invention.

[0021] Figure 5 It is a structural diagram of the lower spot welding mechanism in an embodiment of the present invention.

[0022] Figure 6 It is a structural diagram of the jig disassembly and reflux mechanism in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] For the convenience of those skilled in the art to understand, the present invention will be further described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0024] Please refer to Figures 1-6 , the embodiments of the present invention include:

[0025] A bracket-free battery pack automatic spot welding device includes a spot welding fixture 100 for loading a battery pack, a fixture assembly line 200 for transporting the spot welding fixture 100, an upper spot welding mechanism 300 for welding a nickel sheet on the upper end face of the battery pack, a spot welding flipping mechanism 400 for flipping the spot welding fixture 100, a lower spot welding mechanism 500 for welding a nickel sheet on the lower end face of the battery pack, a fixture disassembly and reflow mechanism 600 for disassembling and reflowing the spot welding fixture 100, and a material unloading mechanism 700. The spot welding fixture 100 includes an upper hinge 101 and a lower hinge 102, which are buckled up and down to clamp and fix the battery pack 001 and the nickel sheet, and the upper hinge 101 and the lower hinge 102 are dug with a through hole 103. The spot welding fixture is assembled into one body by the upper hinge and the lower hinge to realize positioning and fixing of the battery pack and the nickel sheet. The battery pack (without bracket) is positioned by defining the cavity through workpiece profiling. The battery cells and nickel sheets are assembled into a whole through upper and lower hinges, and the battery cell packaging is achieved through spot welding.

[0026] The upper spot welding mechanism 300 includes an upper spot welding head 301 for welding the nickel sheet to the upper end surface of the battery pack, a first X movable axis 302, a first Y movable axis 303, a first Z movable axis 304, and a first R movable axis 305 that drive the upper spot welding head 301 to move and extend the upper spot welding head 301 into the through hole 103 and align with the nickel sheet to be welded. A blocking cylinder is provided in the jig assembly line, and the blocking cylinder push rod is pushed out to block the spot welding jig flowing in the jig assembly line. The positioning cylinder lifts the spot welding jig, and then the upper spot welding mechanism spot welds the upper end surface of the battery pack, so that the nickel sheet is firmly welded to the upper end surface of the battery pack. After the jig is in place after spot welding, the first X movable axis, the first Y movable axis, the first Z movable axis, and the first R movable axis are four-axis linkage, and the nickel sheet is welded to the upper end surface of the battery pack through the upper spot welding head.

[0027] The spot welding flipping mechanism 400 includes a first blocking component 410 for blocking the spot welding jig 100 flowing in the jig assembly line 200, a flipping component 420 for flipping the spot welding jig 100 blocked by the first blocking component 410, and a positioning component 430 for sending the spot welding jig 100 blocked by the first blocking component 410 to the flipping component 420.

[0028] The first blocking component 410 is a blocking cylinder 411 disposed on the jig assembly line 200 . The push rod of the blocking cylinder 411 can block the spot welding jig 100 flowing in the jig assembly line 200 after being extended.

[0029] The flip assembly 420 includes a flip bracket 421, a flip motor 422 installed on the flip bracket 421, a flip clamping head 423 driven to rotate by the flip motor 422, and an auxiliary clamping head 424 that rotates with the rotation of the flip clamping head 423. The flip clamping head 423 and the auxiliary clamping head 424 clamp the spot welding jig 100 from both sides of the spot welding jig 100 respectively.

[0030] The positioning component 430 includes a positioning cylinder 431 disposed on the jig assembly line 200. A positioning plate 432 is connected to the end of the push rod of the positioning cylinder 431. The positioning plate 432 is used to send the spot welding jig 100 blocked by the first blocking component 410 to the flipping clamping head 423.

[0031] When the spot welding jig is in place, the blocking cylinder of the first blocking component jacks up for positioning, and the positioning cylinder of the positioning component rises for precise positioning. After positioning, the flipping component flips the jig 180°, swapping the upper and lower end faces, and welding the other battery surface at the next position.

[0032] The lower spot welding mechanism 500 includes a lower spot welding head 501 for welding nickel sheets to the lower end face of the battery pack, a second X moving axis 502, a second Y moving axis 503, a second Z moving axis 504, and a second R moving axis 505 that drive the lower spot welding head 501 to move and make the lower spot welding head 501 extend into the through hole 103 and align with the nickel sheet to be welded. After the jig is in place after spot welding, the second X moving axis, the second Y moving axis, the second Z moving axis, and the second R moving axis are in four-axis linkage, and the nickel sheet is welded to the lower end face of the battery pack through the lower spot welding head.

[0033] The jig disassembly and return mechanism 600 includes a second blocking component for blocking the spot welding jig 100 flowing in the jig assembly line 200, and a disassembly and return mechanism 610 for disassembling the spot welding jig 100.

[0034] The second blocking component is a blocking cylinder disposed on the jig assembly line 200. After the push rod of the blocking cylinder extends, it can block the spot welding jig 100 flowing in the jig assembly line 200.

[0035] The disassembly and return mechanism 610 includes a disassembly bracket 611, a slide rail 612 disposed on the disassembly bracket 611, a sliding plate 613 sliding on the slide rail 612, a lifting cylinder 614 disposed on the sliding plate 613, a lifting plate 615 connected to the push rod of the lifting cylinder 614, a battery pack pressing cylinder 616 installed on the lifting plate 615, a flipping chuck installed on the lifting plate 615, a flipping cylinder 618 for driving the flipping chuck to rotate, an auxiliary chuck 619 that rotates with the rotation of the flipping chuck, and a hinge return line disposed beside the jig assembly line 200. The flipping chuck and the auxiliary chuck respectively clamp the lower hinge 102 from both sides of the lower hinge 102. The battery pack pressing cylinder 616 has a plurality of push rods 617, and the push rods 617 pass through the through hole 103 and press against the end face of the battery pack.

[0036] After spot welding is completed, the spot welding fixture moves into position, the push rod of the lifting cylinder descends, and the push rod of the battery pack pressing cylinder presses against the lower end face of the battery pack. At the same time, the flipping chuck and the auxiliary chuck clamp the lower hinge. When the push rod of the battery pack pressing cylinder extends, the lower hinge separates from the upper hinge, and the clamped lower hinge is transported along the slide rail to the hinge return line. The blanking mechanism is a common robotic arm transportation structure, which completes the blanking of the battery pack and sends the lower hinge to the hinge return line to realize the whole-line cyclic operation.

[0037] The process flow of the equipment in this embodiment is as follows: The spot welding fixture moves into position → The cylinder lifts the spot welding fixture to achieve positioning → The upper spot welding mechanism spot-welds the upper end face of the battery pack → After spot welding is completed, it moves to the next station → The cylinder lifts the spot welding fixture to achieve positioning → Flips 180° → After spot welding is completed, it moves to the next station → The cylinder lifts the spot welding fixture to achieve positioning → The lower spot welding mechanism spot-welds the lower end face of the battery pack → After welding is completed, it moves to the next station → Automatically opens the hinge → Blanks; and so on, repeating the cycle to achieve automated spot welding.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0039] In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", and "fourth" may explicitly or implicitly include at least one of such features.

[0040] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic spot welding device for a stentless battery pack, characterized in that It includes a spot welding jig (100) for loading a battery pack, a jig assembly line (200) for transporting the spot welding jig (100), an upper spot welding mechanism (300) for welding nickel sheets on the upper end face of the battery pack, a spot welding flipping mechanism (400) for flipping the spot welding jig (100), a lower spot welding mechanism (500) for welding nickel sheets on the lower end face of the battery pack, a jig disassembly and reflux mechanism (600) for disassembling the spot welding jig (100), and a blanking mechanism (700). The spot welding jig (100) includes an upper hinge (101) and a lower hinge (102). The upper hinge (101) and the lower hinge (102) are buckled up and down to clamp and fix the battery pack (001) and the nickel sheet. Through holes (103) are dug in the upper hinge (101) and the lower hinge (102). The jig disassembly and reflux mechanism (600) includes a second blocking component for blocking the spot welding jig (100) flowing in the jig assembly line (200), and a disassembly and reflux mechanism (610) for disassembling the spot welding jig (100). The disassembly and reflux mechanism (610) includes a disassembly bracket (611), a slide rail (612) arranged on the disassembly bracket (611), a sliding plate (613) sliding on the slide rail (612), a lifting cylinder (614) arranged on the sliding plate (613), a lifting plate (615) connected to the push rod of the lifting cylinder (614), a battery pack pressing cylinder (616) installed on the lifting plate (615), a flipping chuck installed on the lifting plate (615), a flipping cylinder (618) for driving the flipping chuck to rotate, an auxiliary chuck (619) rotating with the rotation of the flipping chuck, and a hinge reflux line arranged beside the jig assembly line (200). The flipping chuck and the auxiliary chuck respectively clamp the lower hinge (102) from both sides of the lower hinge (102). The battery pack pressing cylinder (616) has a plurality of push rods (617). The push rods (617) pass through the through holes (103) and press against the end face of the battery pack.

2. The automatic spot welding device for the stentless battery pack according to claim 1, characterized in that The upper spot welding mechanism (300) includes an upper spot welding head (301) for welding nickel sheets on the upper end face of the battery pack, a first X moving axis (302), a first Y moving axis (303), a first Z moving axis (304), and a first R moving axis (305) for driving the upper spot welding head (301) to move and making the upper spot welding head (301) extend into the through hole (103) and align with the nickel sheet to be welded.

3. The stentless battery pack automatic spot welding device according to claim 1, characterized in that, The spot welding flipping mechanism (400) includes a first blocking component (410) for blocking the spot welding jig (100) flowing in the jig assembly line (200), a flipping component (420) for flipping the spot welding jig (100) blocked by the first blocking component (410), and a positioning component (430) for sending the spot welding jig (100) blocked by the first blocking component (410) to the flipping component (420).

4. The automatic spot welding device for a stentless battery pack according to claim 3, characterized in that, The first blocking component (410) is a blocking cylinder (411) arranged on the fixture assembly line (200). After the push rod of the blocking cylinder (411) extends out, it can block the spot welding fixture (100) flowing in the fixture assembly line (200).

5. The automatic spot welding device for a stentless battery pack according to claim 3, characterized in that, The flipping component (420) includes a flipping bracket (421), a flipping motor (422) installed on the flipping bracket (421), a flipping clamping head (423) driven by the flipping motor (422) to rotate, and an auxiliary clamping head (424) that rotates with the rotation of the flipping clamping head (423). The flipping clamping head (423) and the auxiliary clamping head (424) respectively clamp the spot welding fixture (100) from both sides of the spot welding fixture (100).

6. The automatic spot welding device for a stentless battery pack according to claim 5, wherein, The positioning component (430) includes a positioning cylinder (431) arranged on the fixture assembly line (200). The end of the push rod of the positioning cylinder (431) is connected with a positioning plate (432). The positioning plate (432) is used to send the spot welding fixture (100) blocked by the first blocking component (410) to the flipping clamping head (423).

7. The automatic spot welding equipment for the stentless battery pack according to claim 1, characterized in that, The lower spot welding mechanism (500) includes a lower spot welding head (501) for welding nickel sheets to the lower end face of the battery pack, a second X moving axis (502), a second Y moving axis (503), a second Z moving axis (504), and a second R moving axis (505) that drive the lower spot welding head (501) to move and make the lower spot welding head (501) extend into the through hole (103) and align with the nickel sheet to be welded.

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