Battery welding jig and battery welding equipment

Abstract

The invention discloses a battery welding jig and battery welding equipment, and relates to the technical field of welding jigs, the battery welding jig comprises a rotating seat, a fixed seat and a clamping mechanism, a working face is formed on the rotating seat, the fixed seat is arranged on the working face, and the fixed seat comprises a first fixed plate and a second fixed plate which are connected end to end; the first fixing plate and the second fixing plate are vertically arranged, fine adjustment bolts are movably arranged on the first fixing plate and the second fixing plate respectively, the clamping mechanism comprises a first clamping assembly and a second clamping assembly, and the first clamping assembly and the second clamping assembly can be close to or away from the first fixing plate and the second fixing plate respectively; according to the technical scheme, fine adjustment of the position of the battery to be welded can be achieved by rotating the fine adjustment bolt, and therefore the positioning precision of the battery to be welded can be met. According to the technical scheme, the adjusting process can be simplified, and therefore the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding jigs, and in particular to a battery welding jig and battery welding equipment. Background Art

[0002] Prismatic batteries are a type of lithium-ion battery widely used in new energy vehicles, energy storage systems, and other applications. Their outer casings, typically made of aluminum or steel, offer high packaging reliability and energy density. Prismatic batteries can be customized to meet product requirements, offering high flexibility and suitability for a wide range of applications. Furthermore, prismatic batteries offer low internal resistance, long cycle life, and excellent heat dissipation, making them an excellent choice for new energy vehicles and energy storage systems.

[0003] Prismatic battery welding is a key process in the battery manufacturing process, primarily used to connect the battery's electrodes, tabs, and individual cells within the battery module. Through high-precision welding techniques, such as laser welding or ultrasonic welding, prismatic battery welding can ensure a stable connection between the electrodes, improving the battery's electrical conductivity and overall structural strength. At the same time, the accuracy of the welding process directly affects the battery's performance, lifespan, and safety. Therefore, in prismatic battery production, optimization and quality control of the welding process are crucial. This not only ensures the firmness and consistency of the welds, but also prevents damage to the battery materials during the welding process to meet the growing demand for high-performance batteries.

[0004] During the battery welding process, a jig is needed to clamp and fix the battery. However, since welding requires high position accuracy of the battery, the clamping plate of the jig needs to be adjusted and measured multiple times until the accuracy requirements are met. The process is cumbersome and the production efficiency is low. Summary of the Invention

[0005] The main purpose of the present invention is to provide a battery welding jig and a battery welding device, aiming to provide a battery welding jig that is more convenient to adjust its positioning accuracy for the battery.

[0006] To achieve the above objectives, the battery welding jig proposed in the present invention is applied to the welding of square batteries, comprising:

[0007] a rotating seat, wherein the rotating seat is formed with a working surface;

[0008] A fixing seat, the fixing seat being arranged on the working surface, the fixing seat comprising a first fixing plate and a second fixing plate connected end to end, the first fixing plate and the second fixing plate being arranged vertically, and the first fixing plate and the second fixing plate being respectively movably provided with fine-tuning bolts; and

[0009] The clamping mechanism includes a first clamping assembly and a second clamping assembly, the first clamping assembly is provided with a first push plate parallel to the first fixed plate and capable of approaching or moving away from the first fixed plate, the second clamping assembly is provided with a second push plate parallel to the second fixed plate and capable of approaching or moving away from the second fixed plate, the first fixed plate, the second fixed plate, the first push plate and the second push plate together enclose a battery accommodating cavity.

[0010] In one embodiment, the fixing seat further includes a first extension plate and a second extension plate, the first extension plate being telescopically arranged at an end of the first fixing plate away from the second fixing plate, and the first extension plate extending along the length direction of the first fixing plate; and / or

[0011] The second extension plate is telescopically disposed at an end of the second fixing plate away from the first fixing plate, and the second extension plate is extended along a length direction of the second fixing plate.

[0012] In one embodiment, the battery welding jig includes an angle measuring instrument, which includes a measuring rod and a display panel. The measuring rod is movably arranged on the side of the fixed seat facing the battery accommodating cavity. The measuring rod is used to abut the battery. The display panel is electrically connected to the measuring rod and is used to display the placement angle of the battery.

[0013] In one embodiment, a right-angle probe is provided at one end of the measuring rod, and the right-angle probe is used to abut against an edge of the battery.

[0014] In one embodiment, the first fixing plate, the second fixing plate, the first extending plate, and the second extending plate are all provided with the fine-tuning bolts.

[0015] In one embodiment, each of the fine-tuning bolts is provided with an identification portion, and the identification portion is provided on an outer peripheral wall of the fine-tuning bolt.

[0016] In one embodiment, the first clamping assembly further comprises a first cylinder, wherein a driving end of the first cylinder is disposed toward the first fixing plate, and the first push plate is disposed at the driving end of the first cylinder; and

[0017] The second clamping assembly further includes a second cylinder, a driving end of the second cylinder is arranged toward the second fixing plate, and the second push plate is arranged at the driving end of the second cylinder.

[0018] In one embodiment, the battery welding jig further includes a self-locking mechanism, which includes a mounting seat and an abutment member movably provided on the mounting seat, wherein the abutment member abuts against or disengages from the fine-tuning bolt respectively.

[0019] In one embodiment, an elastic abutment is provided at one end of the fine-tuning bolt facing the battery accommodating cavity, and the elastic abutment abuts against the battery.

[0020] The present invention also provides a battery welding device, comprising the battery welding jig as described above, wherein the battery welding jig comprises:

[0021] a rotating seat, wherein the rotating seat is formed with a working surface;

[0022] A fixing seat, the fixing seat being arranged on the working surface, the fixing seat comprising a first fixing plate and a second fixing plate connected end to end, the first fixing plate and the second fixing plate being arranged vertically, and the first fixing plate and the second fixing plate being respectively movably provided with fine-tuning bolts; and

[0023] The clamping mechanism includes a first clamping assembly and a second clamping assembly, the first clamping assembly is provided with a first push plate parallel to the first fixed plate and capable of approaching or moving away from the first fixed plate, the second clamping assembly is provided with a second push plate parallel to the second fixed plate and capable of approaching or moving away from the second fixed plate, the first fixed plate, the second fixed plate, the first push plate and the second push plate together enclose a battery accommodating cavity.

[0024] The technical solution of the present invention is to set a fine-tuning bolt on the fixing seat, which abuts against the side wall of the square battery. By adjusting the extension length of the fine-tuning bolt, the position of the square battery is also changed, thereby easily changing the battery position coordinates to meet the position accuracy requirements. Specifically, the battery welding jig includes a rotating seat, a fixing seat and a clamping mechanism. The rotating seat forms a working surface. The fixing seat includes a first fixing plate and a second fixing plate, which are connected end to end and arranged vertically to form an L-shaped structure as a whole. The first clamping assembly arranged opposite to the first fixing plate and the second clamping assembly arranged opposite to the second fixing plate are respectively provided with a first push plate and a second push plate that can move closer to or away from the two fixing plates. The first fixing plate, the second fixing plate, the first push plate and the second push plate together enclose a battery receiving cavity. By adjusting the distance between the first push plate and the first fixing plate and the distance between the second push plate and the second fixing plate, the size of the battery receiving cavity can be adjusted to meet the clamping and fixing requirements of batteries of different sizes. The first fixing plate and the second fixing plate are both provided with fine-tuning bolts. By rotating the fine-tuning bolts, the position of the battery to be welded can be fine-tuned, so that its positioning accuracy is met. The technical solution provided by the present invention can simplify the adjustment process, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of an embodiment of a battery welding jig provided by the present invention;

[0027] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0028] Figure 3 for Figure 1 Schematic diagram of the structure of the fine-tuning bolt.

[0029] Description of Figure Numbers:

[0030] 100. Battery welding jig; 1. Rotating seat; 11. Working surface; 12. Fixing bolt; 2. Fixing seat; 21. First fixing plate; 22. Second fixing plate; 23. Fine-tuning bolt; 231. Elastic abutment portion; 232. Bolt head; 233. Identification portion; 24. First extension plate; 25. Second extension plate; 3. Clamping mechanism; 31. First clamping assembly; 311. First push plate; 312. First cylinder; 32. Second clamping assembly; 321. Second push plate; 322. Second cylinder; 4. Angle measuring instrument; 41. Measuring rod; 411. Right-angle probe; 42. Display panel; 5. Self-locking mechanism; 51. Mounting seat; 52. Abutment.

[0031] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The present invention proposes a battery welding jig and a battery welding device, aiming to provide a battery welding jig that is more convenient to adjust its positioning accuracy on the battery. Figures 1 to 3 A schematic structural diagram of an embodiment of a battery welding jig provided by the present invention.

[0036] Please refer to Figures 1 to 3 The present invention proposes a battery welding jig 100, including a rotating seat 1, a fixed seat 2 and a clamping mechanism 3, the rotating seat 1 is formed with a working surface 11, the fixed seat 2 is arranged on the working surface 11, the fixed seat 2 includes a first fixed plate 21 and a second fixed plate 22 connected end to end, the first fixed plate 21 and the second fixed plate 22 are arranged vertically, and the first fixed plate 21 and the second fixed plate 22 are respectively movably provided with a fine-tuning bolt 23, the clamping mechanism 3 includes a first clamping component 31 and a second clamping component 32, the first clamping component 31 is provided with a first push plate 311 parallel to the first fixed plate 21 and capable of approaching or moving away from the first fixed plate 21, the second clamping component 32 is provided with a second push plate 321 parallel to the second fixed plate 22 and capable of approaching or moving away from the second fixed plate 22, the first fixed plate 21, the second fixed plate 22, the first push plate 311 and the second push plate 321 together enclose a battery accommodating cavity.

[0037] The technical solution of the present invention is to set a fine-tuning bolt 23 on the fixing seat 2, and the fine-tuning bolt 23 abuts against the side wall of the square battery. By adjusting the protruding length of the fine-tuning bolt 23, the position of the square battery is also changed, thereby easily changing the battery position coordinates to meet the position accuracy requirements. Specifically, the battery welding jig 100 includes a rotating seat 1, a fixed seat 2 and a clamping mechanism 3. The rotating seat 1 is formed with a working surface 11. The fixed seat 2 includes a first fixed plate 21 and a second fixed plate 22, and the two are connected end to end and arranged vertically, forming an L-shaped structure as a whole. The first clamping assembly 31 arranged opposite to the first fixed plate 21 and the second clamping assembly 32 arranged opposite to the second fixed plate 22 are respectively provided with a first push plate 311 and a second push plate 321 that can be close to or away from the two fixed plates. The first fixed plate 21, the second fixed plate 22, the first push plate 311 and the second push plate 321 together enclose a battery accommodating cavity. By adjusting the distance between the first push plate 311 and the first fixed plate 21 and the distance between the second push plate 321 and the second fixed plate 22, the size of the battery accommodating cavity can be adjusted to meet the clamping and fixation of batteries of different sizes. The first fixed plate 21 and the second fixed plate 22 are both provided with fine-tuning bolts 23. By rotating the fine-tuning bolts 23, the position of the battery to be welded can be fine-tuned, so that its positioning accuracy can be met. The technical solution provided by the present invention can simplify the adjustment process, thereby improving production efficiency.

[0038] It is understandable that laser welding is usually used for the shell welding of square batteries. The laser emitter is driven by a robotic arm to achieve welding. A high-energy-density laser beam is generated by a laser generator, transmitted to the welding head through an optical fiber or lens system, and focused on the seam of the battery shell, causing the material to melt instantly and form a weld. During the welding process, the robotic arm moves precisely according to the preset trajectory to ensure that the laser beam moves evenly along the seam. At the same time, the sensor monitors the welding parameters in real time and feeds back to the control system to dynamically adjust the welding conditions to ensure welding quality and efficiency. The square battery is pressed against the fixed seat 2 by the clamping mechanism 3 and is located on the rotating table. The outer shell of the battery has four edges that need to be welded. The rotating table rotates according to the welding requirements so that the shell seams are aligned with the welding head in turn, and the robotic arm moves according to the preset trajectory to ensure the continuity and uniformity of the welding. The entire process is completed by an automated control system with the advantages of high precision, high efficiency and low deformation.

[0039] It should be noted that the fine-tuning bolt 23 can be automatically driven to move relative to the product, or it can be adjusted manually. This application does not impose any restrictions on this. In one embodiment of the present invention, the fine-tuning bolt 23 is adjusted manually. Accordingly, the adjustment of the fine-tuning bolt 23 needs to be carried out according to the preset adjustment displacement stroke of the product. In order to clearly understand the movement amount of the fine-tuning bolt 23, so that its movement distance conforms to the preset adjustment displacement stroke of the product, an identification portion 233 is provided on the outer peripheral wall (screw body part) of each fine-tuning bolt 23. For details, please refer to Figure 3 , the identification portion 233 is a scale line. When the fine-tuning bolt 23 rotates in the fixed plate, the fine-tuning bolt 23 will move axially, and the distance moved is proportional to the number of rotations of the fine-tuning bolt 23. The scale line subdivides the number of rotations of the screw into 100 small grids, each grid represents 0.01 mm. By reading the value on the scale line, the moving distance of the fine-tuning bolt 23 can be accurately obtained, so that the movement amount and adjustment distance of the bolt can be displayed intuitively. This design makes it easy for the operator to accurately grasp the displacement of the fine-tuning bolt 23 and ensure that its moving distance is in line with the preset adjustment displacement stroke of the product, thereby improving the accuracy and consistency of the adjustment. At the same time, the visualization of the scale line also reduces the error caused by manual adjustment, improves the convenience and reliability of operation, and is especially suitable for scenarios that require frequent fine-tuning.

[0040] In the technical solution of the present invention, the fine-tuning of the product position is achieved by fine-tuning the bolt 23. In addition, a servo motor can also be used to drive a multi-link to achieve fine-tuning of the battery position. Specifically, a servo motor is provided on the side of the fixed plate and / or extension plate facing away from the battery accommodating cavity, and the rotational motion of the motor is converted into a linear or reciprocating motion of the connecting rod mechanism. Specifically, after receiving the control signal, the servo motor rotates according to the set angle or speed, and converts the rotational motion into a linear reciprocating motion of the connecting rod through a transmission device (such as a crank-connecting rod mechanism). The connecting rod is movably provided on the fixed plate and exposed to the battery accommodating cavity, so that it generates thrust on the battery, and the battery moves to achieve position adjustment. The design of this mechanism can adjust the length and connection position of the connecting rod according to actual needs, thereby achieving precise motion trajectory and displacement.

[0041] To ensure that the battery is in the preset position and to prevent its angle deflection from causing position error and affecting subsequent welding operations. The battery welding fixture 100 also includes an angle measuring instrument 4. For details, please refer to Figure 1The angle measuring instrument 4 mainly includes a measuring rod 41 and a display panel 42. The measuring rod 41 is mounted on the fixing base 2 and can be mounted on either the first fixing plate 21 or the second fixing plate 22. It can rotate relative to the fixing base 2 of the mounting base. A right-angle probe 411 is provided at one end of the measuring rod 41. The right-angle probe 411 abuts against an edge of the battery, so that both side walls of the battery abut against the right-angle probe 411. In addition, the measuring rod 41 is configured as a retractable structure. During actual operation, the battery is placed in the battery compartment, the fine-tuning bolt 23 is adjusted to position the battery in a preset position, and the measuring rod 41 is controlled to extend so that the probe abuts the battery for secondary verification to ensure that the battery angle is within a reasonable error range. The first fixing plate 21 and the second fixing plate 22 serve as the battery position reference. When the two adjacent side walls of the battery are parallel to the first fixing plate 21 and the second fixing plate 22, respectively, the angle measuring instrument 4 reads 0°, which meets the subsequent processing standards. To facilitate the operator's observation and confirmation, so as to determine that the battery angle is in a reasonable position, the angle measuring instrument 4 includes a display panel 42, which is arranged on the fixing seat 2 and electrically connected to the measuring rod 41, and is used to display the placement angle of the battery measured by the measuring rod 41.

[0042] The battery welding jig 100 proposed in the present invention can be applied to the welding of square batteries of different sizes. In view of this, in the welding operation of larger square batteries, since the lengths of the first fixing plate 21 and the second fixing plate 22 are fixed, it may result in that when the square battery is pressed against the first fixing plate 21 and the second fixing plate 22, a portion of the square battery is exposed and does not contact the first fixing plate 21 and the second fixing plate 22. This will cause a certain local pressure of the battery to be high, which may cause deformation or even rupture of the battery shell. To this end, the present invention provides a first extension plate 24 at the end of the first fixing plate 21 away from the second fixing plate 22, and correspondingly, a second extension plate 25 is provided at the end of the second fixing plate 22 away from the first fixing plate 21. The first extension plate 24 and the second extension plate 25 are respectively used to expand along the length direction and along the width direction of the battery, so that the side wall of the larger battery can abut against the fixing plate and the extension plate, thereby increasing their contact area, thereby reducing local pressure and providing a more comprehensive covering effect. In order to adjust the coverage area of the plate abutting against the side wall of the battery in the width direction and the coverage area of the plate abutting against the side wall of the battery in the length direction, the first extension plate 24 is telescopically arranged on the first fixed plate 21, and the second extension plate 25 is telescopically arranged on the second fixed plate 22. Taking the first extension plate 24 as an example, it is driven relatively away from or close to the first fixed plate 21 by an electric telescopic rod. The principle of the second extension part is the same.

[0043] It should be noted that the operating principles of the first clamping assembly 31 and the second clamping assembly 32 are exactly the same. Taking the first clamping assembly 31 as an example, the first push plate 311 in the first clamping assembly 31 can be driven by a cylinder or by an electric telescopic rod. This application does not limit this. In one embodiment of the present application, the first clamping assembly 31 includes a first push plate 311 and a first cylinder 312. For details, please refer to Figure 1 The driving end of the first cylinder 312 is set toward the first fixed plate 21, and the first push plate 311 is set at the driving end of the first cylinder 312. By controlling the extension and contraction of the first cylinder 312, the driving of the first push plate 311 can be achieved, that is, the first push plate 311 is close to or away from the first fixed plate 21; Correspondingly, the second clamping assembly 32 includes a second push plate 321 and a second cylinder 322. The driving end of the second cylinder 322 is set toward the second fixed plate 22, and the second push plate 321 is set at the driving end of the second cylinder 322. The clamping force provided by the cylinder is constant and uniform, which can effectively avoid battery slippage due to insufficient clamping force or battery deformation due to excessive clamping force. In addition, the pneumatic clamp has a fast response speed and can quickly complete the clamping and loosening actions, which is suitable for high-beat production environments. At the same time, the cylinder-driven clamp has a simple structure, low maintenance cost, long service life, and can still maintain stable operation in harsh environments.

[0044] In one embodiment of the present application, considering that the contact area between the fine-tuning bolt 23 and the side wall of the battery is small and the pressure is strong, it is easy for the contact position between the battery and the fine-tuning bolt 23 to be scratched, resulting in a poor appearance. In view of this, the present invention provides an elastic abutment 231 at the top of the fine-tuning bolt 23, that is, the end in contact with the battery. The use of rubber or silicone material as the contact end with the outer surface of the battery can avoid scratches on the product surface. Rubber and silicone have good elasticity, softness and wear resistance. Rubber and silicone can provide a buffer when contacting the battery, reducing the damage caused by hard contact. At the same time, their surface friction coefficient is high, which can effectively prevent the battery from sliding during the clamping process, thereby protecting the battery surface from scratches or indentations. In addition, the deformation of the elastic abutment 231 is small, which can avoid the product positioning being affected by the deformation of the elastic abutment 231.

[0045] In order to prevent the vibration of the entire equipment and the force generated by the rotation of the rotating seat 1 from causing the fine-tuning bolt 23 to rotate relative to the fixed plate and causing the product positioning position to shift, the fixture is also provided with a self-locking mechanism 5. For details, please refer to Figure 2The self-locking mechanism 5 includes a mounting seat 51 and an abutment member 52 disposed on the mounting seat 51. The mounting seat 51 is disposed on the first fixing plate 21 or the second fixing plate 22 or the first extension plate 24 or the second extension plate 25. The abutment member 52 is disposed relative to the bolt head 232. When the fine-tuning bolt 23 is adjusted to a preset position, the abutment member 52 is controlled to extend until it abuts against the bolt head 232. At this point, the fine-tuning bolt 23 is locked and cannot rotate. This achieves locking of the fine-tuning bolt 23.

[0046] The present invention also proposes a battery welding device, which includes a battery welding jig 100. The specific structure of the battery welding jig 100 refers to the above embodiment. Since the battery welding device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0047] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A battery welding jig, used for welding square batteries, characterized in that: include: a rotating seat, wherein the rotating seat is formed with a working surface; A fixing seat is provided on the working surface, the fixing seat comprising a first fixing plate and a second fixing plate connected end to end, the first fixing plate and the second fixing plate being arranged vertically, and the first fixing plate and the second fixing plate being movably provided with fine-tuning bolts respectively; as well as The clamping mechanism includes a first clamping assembly and a second clamping assembly, the first clamping assembly is provided with a first push plate parallel to the first fixed plate and capable of approaching or moving away from the first fixed plate, the second clamping assembly is provided with a second push plate parallel to the second fixed plate and capable of approaching or moving away from the second fixed plate, the first fixed plate, the second fixed plate, the first push plate and the second push plate together enclose a battery accommodating cavity.

2. The battery welding jig according to claim 1, characterized in that: The fixing seat further includes a first extension plate and a second extension plate, wherein the first extension plate is telescopically arranged at an end of the first fixing plate away from the second fixing plate, and the first extension plate is extended along the length direction of the first fixing plate; and / or The second extension plate is telescopically disposed at an end of the second fixing plate away from the first fixing plate, and the second extension plate is extended along a length direction of the second fixing plate.

3. The battery welding jig according to claim 1, characterized in that: The battery welding jig includes an angle measuring instrument, which includes a measuring rod and a display panel. The measuring rod is movably arranged on the side of the fixing seat facing the battery accommodating cavity. The measuring rod is used to abut the battery. The display panel is electrically connected to the measuring rod and is used to display the placement angle of the battery.

4. The battery welding jig according to claim 3, characterized in that: One end of the measuring rod is provided with a right-angle measuring head, and the right-angle measuring head is used to abut against an edge of the battery.

5. The battery welding jig according to claim 2, characterized in that: The first fixing plate, the second fixing plate, the first extending plate and the second extending plate are all provided with the fine-tuning bolts.

6. The battery welding jig according to claim 5, characterized in that: Each of the fine-tuning bolts is provided with an identification portion, and the identification portion is provided on the outer peripheral wall of the fine-tuning bolt.

7. The battery welding jig according to any one of claims 1 to 6, characterized in that: The first clamping assembly further includes a first cylinder, wherein a driving end of the first cylinder is disposed toward the first fixing plate, and the first push plate is disposed at the driving end of the first cylinder; and The second clamping assembly further includes a second cylinder, a driving end of the second cylinder is arranged toward the second fixing plate, and the second push plate is arranged at the driving end of the second cylinder.

8. The battery welding jig according to any one of claims 1 to 6, characterized in that: The battery welding jig further includes a self-locking mechanism, which includes a mounting seat and an abutment member movably provided on the mounting seat, wherein the abutment member abuts against or disengages from the fine-tuning bolt respectively.

9. The battery welding jig according to claim 8, characterized in that: An elastic abutment is provided on one end of the fine-tuning bolt facing the battery accommodating cavity, and the elastic abutment abuts against the battery.

10. A battery welding device, characterized in that: The invention comprises the battery welding jig according to any one of claims 1 to 9.

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