Welding fixture and welding equipment

Abstract

The utility model relates to the technical field of lithium ion batteries, in particular to a welding fixture and welding equipment. Comprising a lower pressing block, a pressing claw assembly and a gas hood, the pressing claw assembly comprises a base, a cover plate and a pressing claw, the cover plate is connected with the base through a connecting piece, a through hole is formed in one side of the base, one end of the pressing claw penetrates through the through hole to be exposed, the other end of the pressing claw is arranged between the base and the cover plate and connected with the cover plate, an elastic piece is arranged between the pressing claw and the cover plate, and a first light-transmitting cavity is formed in the cover plate. A second light-transmitting cavity corresponding to the first light-transmitting cavity is formed in the pressing claw; the gas hood is arranged on the side, away from the lower pressing block, of the pressing claw assembly in a covering mode and provided with a light-transmitting hole, and the light-transmitting hole corresponds to the first light-transmitting cavity. The problems that in the prior art, pressure of a welding clamp on to-be-welded areas of foils and tabs is not uniform, and insufficient welding, explosive welding and the like are prone to occurring are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a welding fixture and welding equipment. Background Art

[0002] With the advancement of the market and technology, consumer electronic devices have become popular. Such electronic devices are equipped with lithium-ion batteries to power the electronic devices to ensure normal use.

[0003] In addition, lithium battery technology has developed and improved rapidly, bringing great convenience to people's daily life. Based on this, more and more related ancillary products have emerged, such as charging equipment, testing equipment, welding equipment, etc. for lithium batteries. As the use of lithium batteries gradually increases, the production of lithium batteries has become more and more important. Traditional manual welding and assembly can no longer meet the actual efficiency requirements. Therefore, continuous and efficient welding through automation has attracted much attention.

[0004] In the production process of lithium batteries, laser welding is an important processing technology in the modern lithium-ion power battery industry. It is widely used due to its high energy density, contactless welding and high degree of automation. In the existing laser welding fixture, the upper pressing block is a steel block with a slot in the middle to press the overlapping area of the foil and the tab, and the lower pressing block is a horizontal steel block. The laser irradiates the overlapping area to form a weld. The fixture with such a structure is prone to uneven pressure or gaps in the overlapping area of the foil and the tab, resulting in welding problems such as cold welding and blown welding. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is to provide a welding fixture and a welding device to solve the problem in the prior art that the welding fixture has uneven pressure on the areas to be welded between the foil and the tab, which easily leads to cold welding and exploded welding.

[0006] In the first aspect, the utility model discloses a welding fixture, comprising: a lower pressing block, a pressing claw assembly and an air hood, wherein the lower pressing block is used to place the pole ear and the foil; the pressing claw assembly comprises a base, a cover plate and a pressing claw, the cover plate is connected to the base through a connecting piece, a through hole is provided on one side of the base, one end of the pressing claw passes through the through hole and is exposed, and the other end is arranged between the base and the cover plate and connected to the cover plate, an elastic member is provided between the pressing claw and the cover plate, a first light-transmitting cavity is provided on the cover plate, and a second light-transmitting cavity corresponding to the first light-transmitting cavity is provided on the pressing claw; the air hood is provided on the side of the pressing claw assembly away from the lower pressing block, and a light-transmitting hole is provided on the air hood, and the light-transmitting hole is arranged corresponding to the first light-transmitting cavity.

[0007] Optionally, the light-transmitting hole, the first light-transmitting cavity, and the second light-transmitting cavity are arranged in sequence, and the diameter of the light-transmitting hole is greater than the diameter of any region of the cross-section of the first light-transmitting cavity, the diameter of any region of the cross-section of the first light-transmitting cavity is greater than the diameter of any region of the cross-section of the second light-transmitting cavity, and the inner walls of the first light-transmitting cavity and the second light-transmitting cavity both have an inclination angle with respect to the vertical direction, and the inclination angle is greater than or equal to 15°.

[0008] Optionally, the cover plate is provided with a first mounting hole, the pressing claw is provided with a second mounting hole, and the pressing claw assembly further includes a positioning pin, which is fixedly connected to one of the first mounting hole or the second mounting hole and slidably connected to the other.

[0009] Optionally, the cover plate is provided with a first limiting hole, the pressing claw is provided with a second limiting hole corresponding to the first limiting hole, and the elastic member is located between the first limiting hole and the second limiting hole.

[0010] Optionally, the pressing claw includes a connecting portion, an extending portion, and a pressing portion that are connected to each other. The second mounting hole is provided in the connecting portion. The extending portion extends out through the through hole. The extending portion and the connecting portion form an "L" shaped structure. The pressing portion is used to press the tab and the foil.

[0011] Optionally, the outer contour width of the pressing portion is greater than or equal to 45 mm.

[0012] Optionally, a welding slag groove is provided on one side of the lower pressing block facing the pressing claw assembly. The welding slag groove is correspondingly arranged with the second light-transmitting cavity, and a copper sheet is inlaid at the bottom of the welding slag groove.

[0013] Optionally, a receiving cavity is provided in the lower pressing block. The receiving cavity is correspondingly arranged with the welding slag groove, and the receiving cavity is used to receive a coolant.

[0014] Optionally, the welding fixture further includes a connecting pipe and a gas storage tank. One end of the connecting pipe is arranged in the gas hood, and the other end is connected to the gas storage tank to introduce a protective gas into the gas hood and the pressing claw assembly.

[0015] In a second aspect, the present utility model also discloses a welding device, including a laser emitter and the welding fixture in any one of the above. The laser emitter is correspondingly arranged with the light-transmitting hole, the first light-transmitting cavity, and the second light-transmitting cavity of the welding fixture.

[0016] Compared with the prior art, the beneficial effects of the welding jig and the welding equipment provided by the embodiments of the present utility model are as follows: The lower pressing block is used to place the tab and the foil. After the tab and the foil are placed, the claw assembly can press the area to be laser welded, so that the areas to be welded of the tab and the foil are kept flat and horizontal on the lower pressing block, ensuring that the tab and the foil maintain a stable position during the laser welding process, which helps to improve the accuracy of the welding jig during laser welding and avoid problems such as false soldering. The claw assembly includes a base, a cover plate and claws. The structure of the claw assembly is simple, and the assembly and debugging are less difficult and convenient to operate. On the other hand, the base and the cover plate are connected together by a connecting piece, and an elastic member is arranged between the claw and the cover plate. During actual use, when the claw contacts the tab and the foil placed on the base, the elastic member can play a certain buffering role, so that there is a certain margin of movement in the downward pressing action of the claw, avoiding damage to the tab and the foil, making the downward pressing of the claw on the tab and the foil more reliable, and ensuring a good fit between the tab and the foil. The above setting method enables the welding jig to press and position the area to be welded during the laser welding process, ensuring the accuracy of laser welding and avoiding situations such as false soldering and explosion soldering. Brief Description of the Drawings

[0017] The technical solutions of the present utility model will be further described in detail below in conjunction with the drawings and embodiments. In the drawings:

[0018] Figure 1 is a schematic diagram of the welding jig provided by the embodiment of the present utility model.

[0019] The reference numerals in the drawings are as follows:

[0020] 1000, welding jig; 100, lower pressing block; 101, welding slag groove; 102, accommodating cavity; 200, claw assembly; 201, base; 2011, through hole; 202, cover plate; 2021, first light-transmitting cavity; 2022, first mounting hole; 2023, first limiting hole; 203, claw; 2031, second light-transmitting cavity; 2032, second mounting hole; 2033, second limiting hole; 2034, connecting portion; 2035, extending portion; 2036, pressing portion; 204, elastic member; 205, positioning pin; 206, connecting piece; 300, air hood; 301, light-transmitting hole. Detailed Description of the Embodiments

[0021] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Now, in conjunction with the drawings, the preferred embodiments of the present utility model will be described in detail.

[0022] The embodiment of the present utility model provides a welding jig 1000, as Figure 1As shown in the figure, the welding fixture 1000 includes a lower pressing block 100, a jaw assembly 200 and an air hood 300. The lower pressing block 100 is used to place the tab and the foil. The jaw assembly 200 includes a base 201, a cover plate 202 and jaws 203. The cover plate 202 is connected to the base 201 through a connecting member 206. A through hole 2011 is provided on one side of the base 201. One end of the jaw 203 passes through the through hole 2011 and is exposed, and the other end is disposed between the base 201 and the cover plate 202 and is connected to the cover plate 202. An elastic member 204 is provided between the jaw 203 and the cover plate 202. A first light-transmitting cavity 2021 is provided on the cover plate 202, and a second light-transmitting cavity 2031 corresponding to the first light-transmitting cavity 2021 is provided on the jaw 203. The air hood 300 is covered on the side of the jaw assembly 200 facing away from the lower pressing block 100, and a light-transmitting hole 301 is provided on the air hood 300. The light-transmitting hole 301 is correspondingly arranged with the first light-transmitting cavity 2021.

[0023] The lower pressing block 100 is used to place the tab and the foil. After the tab and the foil are placed, the jaw assembly 200 can press the area to be laser welded to make the area to be welded of the tab and the foil flat and horizontal on the lower pressing block 100, ensuring that the tab and the foil maintain a stable position during the laser welding process, which helps to improve the accuracy of the welding fixture 1000 during laser welding and avoid problems such as false soldering. The jaw assembly 200 includes a base 201, a cover plate 202 and jaws 203. The structure of the jaw assembly 200 is simple, and the assembly and debugging are less difficult and convenient to operate. On the other hand, the base 201 and the cover plate 202 are connected together through a connecting member 206, and an elastic member 204 is provided between the jaw 203 and the cover plate 202. During actual use, when the tab and the foil placed on the jaw 203 and the base 201 come into contact, the elastic member 204 can play a certain buffering role, so that there is a certain margin of movement in the downward pressing action of the jaw 203, avoiding damage to the tab and the foil, and at the same time making the downward pressing of the jaw 203 on the tab and the foil more reliable, ensuring good adhesion between the tab and the foil. The above setting method enables the welding fixture 1000 to press and position the area to be welded during the laser welding process, ensuring the accuracy of laser welding and avoiding situations such as false soldering and explosion soldering.

[0024] Specifically, a light-transmitting hole 301 is provided on the air hood 300, a first light-transmitting cavity 2021 is provided on the cover plate 202, and a second light-transmitting cavity 2031 corresponding to the first light-transmitting cavity 2021 is provided on the jaw 203. When the welding fixture 1000 is used for laser welding, it is convenient for the laser beam to contact the area to be welded of the foil and the tab through the light-transmitting hole 301, the first light-transmitting cavity 2021 and the second light-transmitting cavity 2031 to complete the laser welding.

[0025] Specifically, the air hood 300 is disposed on the side of the pressing jaw assembly 200 away from the pressing block 100. The air hood 300 is provided with a light-transmitting hole 301, and the light-transmitting hole 301 is correspondingly arranged with the first light-transmitting cavity 2021. The setting of the air hood 300 can protect the operator from heat and splashing, and at the same time, the design of the light-transmitting hole 301 allows the operator to still clearly observe the laser welding process.

[0026] Reference Figure 1 , the light-transmitting hole 301, the first light-transmitting cavity 2021, and the second light-transmitting cavity 2031 are arranged in sequence, and the diameter of the light-transmitting hole 301 is greater than the diameter of any area of the cross-section of the first light-transmitting cavity 2021, the diameter of any area of the cross-section of the first light-transmitting cavity 2021 is greater than the diameter of any area of the cross-section of the second light-transmitting cavity 2031, and the inner walls of the first light-transmitting cavity 2021 and the second light-transmitting cavity 2031 both have an inclination angle with the vertical direction, and the inclination angle is greater than or equal to 15°.

[0027] The larger diameter of the light-transmitting hole 301 avoids the transmission of the laser beam and the influence on the laser welding effect, thereby improving work efficiency and laser welding quality. The inner walls of the first light-transmitting cavity 2021 and the second light-transmitting cavity 2031 have an inclination angle with the vertical direction, and the inclination angle is greater than or equal to 15°, which is to adapt to the laser beam used for laser welding, helps the laser beam to pass through, effectively reduces the shielding and reflection of the laser beam by the first light-transmitting cavity 2021 and the second light-transmitting cavity, thereby increasing the accuracy during the laser welding process and avoiding interference with the normal progress of the laser welding work.

[0028] Specifically, an inclination angle greater than or equal to 15° may help to effectively reduce the reflection of the internal laser beam, avoid laser beam interference, ensure that the operator can accurately observe the laser welding process, and improve the accuracy and quality of laser welding.

[0029] Reference Figure 1 , the cover plate 202 is provided with a first mounting hole 2022, the pressing jaw 203 is provided with a second mounting hole 2032, and the pressing jaw assembly 200 further includes a positioning pin 205. The positioning pin 205 is fixedly connected to one of the first mounting hole 2022 or the second mounting hole 2032 and slidably connected to the other.

[0030] A positioning pin 205 is provided between the cover plate 202 and the pressing jaw 203 to ensure that the pressing jaw 203 can move vertically relative to the cover plate 202. During the movement of the pressing jaw 203, due to the elastic deformation of the spring, movement occurs in the vertical direction, preventing the pressing jaw 203 from shifting horizontally during movement and deviating from the area to be welded. The cover plate 202 is provided with a first mounting hole 2022, and the pressing jaw 203 is provided with a second mounting hole 2032. The positioning pin 205 is installed between the first mounting hole 2022 and the second mounting hole 2032. In this embodiment, since an elastic member 204 is provided between the pressing jaw 203 and the cover plate 202, the pressing jaw 203 will generate a certain displacement in the vertical direction due to the elastic deformation of the elastic member 204. Therefore, the pressing jaw 203 needs to displace relative to the cover plate 202 through the positioning pin 205. So, the positioning pin 205 is fixedly connected to one of the first mounting hole 2022 or the second mounting hole 2032 and slidably connected to the other, thereby enabling the pressing jaw 203 to displace relative to the cover plate 202 through the positioning pin 205.

[0031] Specifically, through the connection between the positioning pin 205 and the first mounting hole 2022 or the second mounting hole 2032, it can be ensured that the elastic member 204 moves in the vertical direction, avoiding jitter and skew in the horizontal direction. This enables the movement of the pressing jaw 203 relative to the tab and the foil to remain stable, and can accurately press and position the tab and the foil, ensuring stability and accuracy during the laser welding process.

[0032] Specifically, the positioning pin 205 is fixedly connected to one of the first mounting hole 2022 or the second mounting hole 2032 and slidably connected to the other. This design allows the positioning pin 205 to be easily moved when the position of the pressing jaw assembly 200 needs to be adjusted, achieving quick and precise adjustment, and improving the convenience and efficiency of operation.

[0033] It should be noted that the length of the positioning pin 205 is 8 - 10 mm and the diameter is 2 - 3 mm, while the diameter of the first mounting hole 2022 and / or the second mounting hole 2032 is 2.2 - 3.2 mm, slightly larger than the diameter of the positioning pin 205. This can protect the positioning pin 205, the cover plate 202, and the pressing jaw 203 from being damaged when the pressing jaw 203 has a small range of horizontal offset.

[0034] Reference Figure 1 , the cover plate 202 is provided with a first limiting hole 2023, the pressing jaw 203 is provided with a second limiting hole 2033 corresponding to the first limiting hole 2023, and the elastic member 204 is located between the first limiting hole 2023 and the second limiting hole.

[0035] An elastic member 204 is provided between the first limiting hole 2023 and the second limiting hole 2033. The first limiting hole 2023 and the second limiting hole 2033 are used for the relative movement range between the elastic member 204, the cover plate 202 and the clamping jaw 203. To ensure that the elastic member 204 maintains the correct position during the laser welding process, ensure the correct position of the clamping jaw 203 in the vertical direction, and ensure that the clamping jaw 203 presses the tab and the foil while avoiding damage to the tab and the foil, thereby improving the accuracy and stability of the laser welding.

[0036] Specifically, the elastic member 204 is located between the first limiting hole 2023 and the second limiting hole 2033, playing a buffering and adjusting role. The elastic member 204 can absorb and reduce the impact or vibration between the cover plate 202 and the clamping jaw 203, ensuring stability during the operation.

[0037] Specifically, the elastic member 204 is provided between the first limiting hole 2023 and the second limiting hole 2033, so that the cover plate 202, the elastic member 204 and the clamping jaw cooperate with each other to form a controllable limiting and buffering mechanism. To protect the components of the welding fixture 1000, extend its service life, and improve the accuracy and safety of the laser welding operation.

[0038] It should be noted that the diameter of the elastic member 204 is 2 - 3 mm, the length is 5 - 8 mm, the telescopic amount of the elastic member 204 is 1 - 2 mm, and there is a gap of 1 - 2 mm between the cover plate 202 and the clamping jaw 203 for the telescopic of the elastic member 204.

[0039] Reference Figure 1 , the clamping jaw 203 includes a connecting portion 2034, an extending portion 2035 and a pressing portion which are connected to each other. The second mounting hole 2032 is provided in the connecting portion 2034, the extending portion 2035 is exposed through the through hole 2011, the extending portion 2035 and the connecting portion 2034 are in an "L" - shaped structure, and the pressing portion is used to press the tab and the foil.

[0040] The connecting portion 2034, the extending portion 2035 and the pressing portion are connected to each other to form a complete clamping jaw 203 structure. The extending portion 2035 and the connecting portion 2034 are in an "L" - shaped structure to ensure the overall stability and strength of the clamping jaw 203, enabling it to withstand the pressure and load of pressing the tab and the foil during the laser welding process.

[0041] Specifically, the extending portion 2035 and the connecting portion 2034 are in an "L" - shaped structure. This design can increase the rigidity and stability of the clamping jaw 203. At the same time, the "L" - shaped structure also helps to provide better mechanical support and pressure transmission for the clamping jaw 203 during the welding process, ensuring the quality and efficiency of the laser welding.

[0042] In an alternative embodiment of the present utility model, the outer contour width of the pressing portion is greater than or equal to 45 mm.

[0043] The outer contour width of the pressing portion being greater than or equal to 45 mm means that the welding fixture 1000 is used to process tabs with a size greater than or equal to 45 mm. Processing tabs with corresponding sizes can ensure the welding effect of the welding fixture 1000 on the tabs and the foil, and ensure the stability and quality of laser welding.

[0044] Specifically, the outer contour width of the pressing portion being greater than or equal to 45 mm allows the pressing portion to have a relatively wide outer contour, providing a larger contact area between the tab and the foil. This can more evenly distribute the pressure onto the surfaces of the tab and the foil, helping to avoid local stress concentration, reducing the risk of deformation and damage to the tab and the foil, and ensuring the uniformity and consistency of laser welding.

[0045] Reference Figure 1 , on the side of the lower pressing block 100 facing the jaw assembly 200, there is a slag groove 101. The slag groove 101 is correspondingly arranged with the second light-transmitting cavity 2031, and a copper sheet is inlaid at the bottom of the slag groove 101.

[0046] The setting of the slag groove 101 can effectively collect the slag and waste generated during the laser welding process, prevent it from accumulating in the welding area, and reduce the generation of welding defects. This helps to maintain the cleanliness and tidiness during the laser welding process and improve the welding quality.

[0047] Specifically, a copper sheet is inlaid at the bottom of the slag groove 101 to prevent the laser beam from directly welding the foil and the tab to the lower pressing block 100. On the other hand, the high thermal conductivity of the copper sheet can help with rapid heat dissipation, avoid overheating in the laser welding area, and reduce the risk of laser welding deformation.

[0048] Specifically, the inlay of the copper sheet in the slag groove 101 can also make maintenance and cleaning more convenient and efficient to a certain extent. The copper sheet inlaid at the bottom of the slag groove 101 can prevent slag from adhering to the bottom of the groove, reducing the difficulty of cleaning.

[0049] It should be noted that the depth of the slag groove 101 is 2 - 3 mm.

[0050] Reference Figure 1 , there is a receiving cavity 102 in the lower pressing block 100. The receiving cavity is correspondingly arranged with the slag groove 101, and the receiving cavity 102 is used to receive coolant.

[0051] The receiving cavity 102 for receiving coolant can help effectively reduce the heat generated during the laser welding process. By setting coolant in the lower pressing block 100, rapid heat dissipation can be achieved, preventing overheating in the laser welding area, thereby protecting the lower pressing block 100 and the jaw assembly 200 and improving the quality and stability of laser welding.

[0052] Specifically, by controlling the temperature and flow rate of the coolant within the pressing block 100, the temperature during the laser welding process can be effectively controlled, avoiding welding defects caused by overheating or overcooling. This helps to improve the quality of laser welding and reduce the risk of deformation of the tab and foil during welding.

[0053] Specifically, introducing coolant into the accommodation cavity 102 can help maintain the stability of the temperature of the pressing block 100. It helps to maintain the stability of the laser welding process, ensure the consistency and quality of laser welding, and also helps to extend the service life of the welding fixture 1000.

[0054] It should be noted that the coolant is input into the pressing block 100 from the outside, circulates within the pressing block 100, and will flow out of the pressing block 100 after taking away the heat of the pressing block 100, so that the circulating coolant reduces the temperature of the pressing block 100.

[0055] Reference Figure 1 , the welding fixture 1000 further includes a connecting pipe and a gas storage tank. One end of the connecting pipe is disposed within the gas hood 300, and the other end is connected to the gas storage tank to introduce a shielding gas into the gas hood 300 and the jaw assembly 200.

[0056] By introducing a shielding gas into the gas hood 300 and the jaw assembly 200 through the connecting pipe and the gas storage tank, the laser welding area can be effectively protected from contamination and oxidation in the external air. The shielding gas can reduce the contact with oxygen and other impurities, prevent oxidation reactions and the generation of laser welding defects, and improve the quality of laser welding.

[0057] Specifically, the use of the shielding gas can improve the quality and accuracy of the weld. The shielding gas can effectively keep the laser welding area clean and pure, avoiding the generation of pores, oxidation and other defects during the welding process, thereby improving the quality and strength of the welding.

[0058] Specifically, introducing a shielding gas into the gas hood 300 and the jaw assembly 200 can also improve the operation safety. The use of the shielding gas can reduce the contact with harmful gases and vapors, improving the operation safety.

[0059] It should be noted that the shielding gas usually uses an inert gas. The inert gas has good protection performance, can effectively prevent the reaction of the welding area with oxygen and impurities in the air, reduce oxidation and contamination, and ensure the welding quality. The use of the inert gas helps to maintain the stability of the molten pool in the welding area, reduce the generation of pores and oxides, and improve the welding quality.

[0060] An embodiment of the present utility model provides a welding device. The welding device includes a laser emitter, the laser emitter and the welding fixture 1000 in the foregoing embodiment, and the laser emitter is correspondingly arranged with the light-transmitting hole 301, the first light-transmitting cavity 2021 and the second light-transmitting cavity 2031 in the welding fixture.

[0061] The laser emitter irradiates the tab and the foil placed on the lower pressing block 100 through the light-transmitting hole 301, the first light-transmitting cavity 2021 and the second light-transmitting cavity 2031, and laser-welds the tab and the foil. At the same time, the clamping jaw assembly 200 presses and positions the area to be welded, which can help the laser reflector to position and guide the tab and the foil, help the laser welding process to proceed smoothly, and improve the accuracy and precision of laser welding.

[0062] Specifically, the use of the laser emitter can help control the laser welding path and the weld position during the laser welding process. Through the positioning and guiding of the laser, the operator can more accurately control the moving trajectory of the laser welding head to ensure the quality and consistency of laser welding.

[0063] It should be noted that the laser emitter can help improve the accuracy and repeatability of the laser welding process. Laser welding is a highly precise laser welding technology that uses the high energy density generated by a laser beam to heat the surface of the workpiece, thereby achieving laser welding. The laser beam has a high energy density and can quickly heat the laser welding area to achieve rapid melting and laser welding, and is suitable for laser welding high melting point and high hardness materials. Laser welding has high precision and controllability and can achieve fine laser welding, and is suitable for applications with high requirements for the quality and precision of laser welding. Laser welding is a non-contact laser welding technology that avoids contamination and deformation that may occur when contacting the workpiece, and is suitable for applications with strict requirements for the surface of the workpiece. The heat input of laser welding is concentrated in the laser welding area, which can reduce the size of the heat affected zone, reduce deformation and residual stress, and is suitable for applications with strict requirements for workpiece deformation. Laser welding is fast and efficient, and is suitable for mass production and automated production lines. Laser welding can achieve laser welding between different materials, including laser welding of metal and non-metal materials, and has a wide range of application fields.

[0064] Using the laser emitter for laser welding can improve the convenience and efficiency of laser welding operations. Through the guidance of the laser emitter, the operator can more quickly and accurately position the area to be welded, which can save operation time and improve work efficiency.

[0065] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the appended claims of the present invention.

Claims

1. A welding fixture, characterized in that, include: A lower pressing block, which is used to place the tabs and the foil; A pressure claw assembly, the pressure claw assembly comprising a base, a cover plate and a pressure claw, the cover plate being connected to the base through a connecting piece, a through hole being provided on one side of the base, one end of the pressure claw passing through the through hole and exposed, the other end being provided between the base and the cover plate and connected to the cover plate, an elastic member being provided between the pressure claw and the cover plate, a first light-transmitting cavity being provided on the cover plate, and a second light-transmitting cavity corresponding to the first light-transmitting cavity being provided on the pressure claw; An air hood is arranged on a side of the pressing claw assembly away from the lower pressing block, and a light-transmitting hole is arranged on the air hood, and the light-transmitting hole is arranged corresponding to the first light-transmitting cavity.

2. The welding jig according to claim 1, characterized in that, The light-transmitting hole, the first light-transmitting cavity and the second light-transmitting cavity are arranged in sequence, and the diameter of the light-transmitting hole is greater than the diameter of any area of the first light-transmitting cavity section, the diameter of any area of the first light-transmitting cavity section is greater than the diameter of any area of the second light-transmitting cavity section, and the inner walls of the first light-transmitting cavity and the second light-transmitting cavity have an inclination angle with the vertical direction, and the inclination angle is greater than or equal to 15°.

3. The welding jig according to claim 1, wherein, The cover plate is provided with a first mounting hole, the pressure claw is provided with a second mounting hole, and the pressure claw assembly further comprises a positioning pin, the positioning pin is fixedly connected to one of the first mounting hole or the second mounting hole, and is slidably connected to the other.

4. The welding jig according to claim 1, wherein The cover plate is provided with a first limiting hole, the pressing claw is provided with a second limiting hole corresponding to the first limiting hole, and the elastic member is located between the first limiting hole and the second limiting hole.

5. The welding jig according to claim 3, wherein The pressing claw includes a connecting portion, an extending portion and a clamping portion that are interconnected, the second mounting hole is provided at the connecting portion, the extending portion is exposed through the through hole, the extending portion and the connecting portion are in an "L"-shaped structure, and the clamping portion is used to clamp the tab and the foil.

6. The welding jig according to claim 5, wherein, The outer contour width of the pressing portion is greater than or equal to 45 mm.

7. The welding jig according to claim 1, characterized in that, A welding slag groove is provided on one side of the lower pressing block facing the pressing claw assembly. The welding slag groove is arranged corresponding to the second light-transmitting cavity, and a copper sheet is inlaid at the bottom of the welding slag groove.

8. The welding jig according to claim 7, characterized in that The lower pressing block is provided with a containing cavity, the containing cavity is arranged corresponding to the welding slag groove, and the containing cavity is used to contain cooling liquid.

9. The welding jig according to claim 1, characterized in that, The welding fixture also includes a connecting pipe and a gas storage tank. One end of the connecting pipe is arranged in the gas hood, and the other end is connected to the gas storage tank so as to introduce protective gas into the gas hood and the pressure claw assembly.

10. A welding device, characterized in that, It comprises a laser emitter and the welding fixture according to any one of claims 1 to 9, wherein the laser emitter is arranged corresponding to the light-transmitting hole, the first light-transmitting cavity and the second light-transmitting cavity of the welding fixture.

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