Battery welding and pressing tool and welding device

Abstract

The utility model provides a battery welding and pressing tool and a welding device, and relates to the technical field of welding devices, on one hand, the battery welding and pressing tool comprises a pressing plate suitable for abutting against a welding part and pressing a connecting stud; the connecting plate is connected to the pressing plate, and the connecting plate is used for being connected with an external laser welding device; the special-shaped groove is formed in the pressing plate and penetrates through the pressing plate in the vertical direction, and the special-shaped groove is suitable for conducting circumferential limiting on the connecting stud; on the other hand, the utility model provides a welding device which comprises the battery welding and pressing tool. The welding device is suitable for welding of connecting studs in various shapes and convenient to use, and the machining efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of welding devices, and particularly to a battery welding pressing tooling and a welding device. Background Art

[0002] As a core component of electric vehicles, the structural stability and reliability of lithium-ion power battery modules directly affect the performance and lifespan of the entire battery system. Currently, when processing modules, multiple battery cells are stacked into a battery cell module, and then connecting pieces are welded to the pole columns of the battery cells to connect multiple single battery cells in series or in parallel. One connecting piece is connected to at least two battery cells, which causes the entire module to be scrapped after any one battery cell in the module is damaged, and it cannot be compatible with the production of modules with different series or parallel requirements and different specifications and models. For this reason, manufacturers have thought of welding connection studs on each single battery cell in advance, then packing multiple battery cells into a battery cell module, and finally sleeving a connecting piece with a connection hole on the connection stud according to the series or parallel requirements and fixing it with a nut to form a module.

[0003] Refer to Figure 1 , the connection stud includes a welding portion at the bottom and a stud body provided on the welding portion. During the process of welding the connection stud, pressure needs to be applied to closely fit the welding portion against the outer shell of the battery cell to prevent the occurrence of failures such as false soldering. To achieve this purpose, a pressing tooling is usually used. Currently, due to diverse connection requirements, the welding portions of connection studs have various different shapes, such as square, circular, etc. However, due to the limited shape of the pressing tooling itself, it can only be applicable to connection studs of one shape. When pressing different connection studs, different pressing toolings need to be replaced, which brings certain inconvenience to the processing process. Summary of the Utility Model

[0004] One technical problem to be solved by the present disclosure is that during the welding process, different pressing toolings need to be replaced according to the different shapes of the connection studs to be pressed, which brings certain inconvenience to the processing process.

[0005] To solve the above technical problem, on the one hand, an embodiment of the present disclosure provides a battery welding pressing tooling, including:

[0006] A pressing plate, which is adapted to abut against the welding portion and press the connection stud;

[0007] A connecting plate, which is connected to the pressing plate and is used to connect an external laser welder; and

[0008] An irregular-shaped groove, which is opened on the pressing plate and penetrates the pressing plate along the thickness direction of the pressing plate, and is adapted to circumferentially limit the connection stud.

[0009] In some embodiments, the special-shaped groove includes an arc-shaped avoidance groove, a square groove, and a counterbore. The arc-shaped avoidance groove, the square groove, and the counterbore communicate with each other. The penetration direction of the square groove is the same as the axial direction of the arc-shaped avoidance groove. The counterbore is located on the side of the pressing plate facing away from the connecting plate, and the counterbore is located at one end of the penetration direction of the square groove.

[0010] In some embodiments, the diameter of the arc-shaped avoidance groove is 8 - 10 mm.

[0011] In some embodiments, an expansion groove is formed on the pressing plate. The expansion groove communicates with the arc-shaped avoidance groove and extends from the arc-shaped avoidance groove to both sides. The width of the expansion groove is smaller than the diameter of the arc-shaped avoidance groove.

[0012] In some embodiments, the depth of the counterbore is 1.2 - 1.5 mm.

[0013] In some embodiments, it further includes a jet structure for introducing a protective gas into the special-shaped groove.

[0014] In some embodiments, the jet structure includes a ventilation groove and an air inlet channel. The ventilation groove communicates with the special-shaped groove and is formed in a circumferential surround along the inner circumferential surface of the special-shaped groove. The air inlet channel is arranged in the pressing plate, and one end of the air inlet channel penetrates through the side wall of the pressing plate to introduce the protective gas.

[0015] In some embodiments, the connecting plate includes a connecting portion and an inclined extension portion. One end of the extension portion is connected to the pressing plate, and the other end of the extension portion is connected to the connecting portion.

[0016] In some embodiments, a plurality of connecting holes are provided on the connecting portion, and the plurality of connecting holes are arranged in a rectangular array.

[0017] On the other hand, an embodiment of the present disclosure provides a welding device, including the above-mentioned battery welding pressing tooling.

[0018] Through the above technical solutions, when the battery welding pressing tooling provided by the present disclosure performs the welding operation of the connecting stud, connecting studs of different shapes can be placed in the special-shaped groove. The pressing plate limits the connecting stud in the vertical direction, and the special-shaped groove limits the connecting stud in the circumferential direction. The special-shaped groove cooperates with the pressing plate to fix the connecting stud, ensuring the welding quality of laser welding and avoiding the phenomenon of false welding. The battery welding pressing tooling provided by the present disclosure can meet the welding requirements of connecting studs of various shapes at the same time, without the need to replace the pressing tooling during the welding process, has a simple structure, is convenient to use, and improves the processing efficiency. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of a connecting stud in the background art of the present disclosure;

[0021] Figure 2 is a schematic overall structural diagram of a battery welding pressing tooling disclosed in an embodiment of the present disclosure;

[0022] Figure 3 is a schematic structural diagram of a pressing plate disclosed in an embodiment of the present disclosure;

[0023] Figure 4 is a cross-sectional view of a battery welding pressing tooling disclosed in an embodiment of the present disclosure;

[0024] Figure 5 is a reference diagram of the usage state of a battery welding pressing tooling for pressing a circular connecting stud disclosed in an embodiment of the present disclosure;

[0025] Figure 6 is a reference diagram of the usage state of a battery welding pressing tooling for pressing a square connecting stud disclosed in an embodiment of the present disclosure.

[0026] Description of reference numerals:

[0027] 1. Pressing plate; 2. Connecting plate; 21. Extension part; 22. Connecting part; 221. Connecting hole; 3. Special-shaped groove; 31. Arc-shaped avoidance groove; 32. Square groove; 33. Sunk groove; 34. Expansion groove; 4. Jet structure; 41. Ventilation groove; 42. Inlet air flow channel. Detailed implementation manners

[0028] The following will further describe in detail the implementation manners of the present disclosure in conjunction with the drawings and embodiments. The following detailed description of the embodiments and the drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.

[0029] These embodiments of the present disclosure are provided to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps described in these embodiments, the components of the materials, the numerical expressions and values should be interpreted as merely exemplary, rather than as limitations.

[0030] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present disclosure 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 should not be construed as a limitation to the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] In addition, the "first", "second" and similar terms used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Terms such as "including" or "comprising" mean that the elements before the term cover the elements listed after the term, and do not exclude the possibility of also covering other elements.

[0032] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0033] All terms used in the present disclosure have the same meaning as understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0034] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technologies, methods and devices should be regarded as part of the specification.

[0035] Referring to Figure 2 , on the one hand, an embodiment of the present disclosure provides a battery welding and pressing tooling, including:

[0036] A pressing plate 1, the pressing plate 1 is adapted to abut against the welding part and press the connecting stud;

[0037] A connecting plate 2 is connected to the pressing plate 1, and the connecting plate 2 is used to connect an external laser welder; and

[0038] A special-shaped groove 3 is formed in the pressing plate 1 and penetrates through the pressing plate 1 along the thickness direction of the pressing plate 1. The special-shaped groove 3 is adapted to circumferentially limit the connecting stud.

[0039] The battery welding pressing tooling provided by the present disclosure includes a rectangular pressing plate 1. During welding operations, the pressing plate 1 is placed horizontally and presses the connecting stud on the battery cell housing, thus playing a role of positioning and pressing.

[0040] A connecting plate 2 is integrally formed on one side edge of the pressing plate 1, and the connecting plate 2 is used to connect an external laser welder.

[0041] Both corners at one end of the pressing plate 1 away from the connecting plate 2 are rounded to eliminate sharpness and avoid scratching other components or operators.

[0042] A special-shaped groove 3 is formed in the pressing plate 1. The special-shaped groove 3 is located in the middle of the pressing plate 1 and penetrates through the pressing plate 1 in the vertical direction. A part of the welding portion at the lower part of the connecting stud is located in the special-shaped groove 3 and abuts against the inner side wall of the special-shaped groove 3. The stud body of the connecting stud extends into the special-shaped groove 3 and extends outward in the vertical direction. The special-shaped groove 3 circumferentially limits and fixes the connecting stud, thereby fixing the position of the connecting stud.

[0043] When the battery welding pressing tooling provided by the present disclosure is performing the welding operation of the connecting stud, connecting studs of different shapes can be placed in the special-shaped groove 3. The pressing plate 1 limits the connecting stud in the vertical direction, and the special-shaped groove 3 limits the connecting stud in the circumferential direction. The special-shaped groove 3 cooperates with the pressing plate 1 to fix the connecting stud, ensuring the welding quality of the laser welding and avoiding the phenomenon of false welding. The battery welding pressing tooling provided by the present disclosure can simultaneously meet the welding requirements of connecting studs of various shapes, without the need to replace the pressing tooling during the welding process, has a simple structure, is convenient to use, and improves the processing efficiency.

[0044] Refer to Figure 2 and Figure 3 In some embodiments, the special-shaped groove 3 includes an arc-shaped avoidance groove 31, a square groove 32, and a counterbore 33. The arc-shaped avoidance groove 31, the square groove 32, and the counterbore 33 are interconnected. The penetration direction of the square groove 32 is the same as the axial direction of the arc-shaped avoidance groove 31. The counterbore 33 is located on the side surface of the pressing plate 1 facing away from the connecting plate 2, and the counterbore 33 is located at one end in the penetration direction of the square groove 32.

[0045] In some embodiments, the special-shaped groove 3 includes an arc-shaped avoidance groove 31 penetrating through the pressing plate 1. The axial direction of the arc-shaped avoidance groove 31 is arranged in the vertical direction. A square groove 32 is communicated with the side of the arc-shaped avoidance groove 31. The square groove 32 is arranged in the vertical direction. The penetration direction of the square groove 32 is the same as the axial direction of the arc-shaped avoidance groove 31. The bottom of the square groove 32 is communicated with a sinking groove 33. The sinking groove 33 is formed on the lower surface of the pressing plate 1. The sinking groove 33 is communicated with the arc-shaped avoidance groove 31. One end of the sinking groove 33 far from the arc-shaped avoidance groove 31 penetrates through the side wall of the pressing plate 1 and communicates with the outside.

[0046] Taking the upper surface of the pressing plate 1 as the reference plane, the projection of the arc-shaped avoidance groove 31 on the reference plane is circular, the projection of the square groove 32 on the reference plane is rectangular, and the projection of the sinking groove 33 on the reference plane is rectangular. Part of the above-mentioned circle coincides with the two above-mentioned rectangles, and the rectangle formed by the projection of the square groove 32 is completely wrapped by the rectangle formed by the projection of the sinking groove 33.

[0047] Reference Figure 1 , for the circular connecting stud and the square connecting stud mentioned in the background art, including a welding part and a stud body arranged on the welding part, a stepped surface is formed on the upper surface of the welding part.

[0048] Referring to Figure 5 , when welding the circular connecting stud, place the circular connecting stud on the battery cell housing, and the battery welding and pressing tooling presses downwards, so that the stepped surface of the circular connecting stud is stuck into the arc-shaped avoidance groove 31, and the stud body extends upwards along the arc-shaped avoidance groove 31 to complete the circumferential limit. Then continue to press downwards so that the lower surface of the pressing plate 1 abuts against the upper surface of the welding part, thereby completing the pressing and fixing operation.

[0049] Referring to Figure 6 , when welding the square connecting stud, place the square connecting stud on the battery cell housing, and the battery welding and pressing tooling presses downwards, so that the stepped surface of the square connecting stud sinks into the sinking groove 33, and the stud body extends into the square groove to complete the circumferential limit. Then continue to press downwards so that the lower surface of the pressing plate 1 abuts against the upper surface of the welding part, thereby completing the pressing and fixing operation.

[0050] Referring to Figure 2 and Figure 3 , in some embodiments, the diameter of the arc-shaped avoidance groove 31 is 8-10 mm.

[0051] In some embodiments, the diameter of the arc-shaped avoidance groove 31 is 8-10 mm. Since the distance between the positive and negative electrode posts of the battery cell is relatively narrow, to ensure that there is no short-circuit risk for the battery cell under the condition of meeting the welding requirements, certain requirements are imposed on the size of the arc-shaped avoidance groove 31.

[0052] Referring to Figure 2 and Figure 3, in some embodiments, an expansion slot 34 is formed in the pressing plate 1. The expansion slot 34 communicates with the arc-shaped avoidance slot 31 and extends from the arc-shaped avoidance slot 31 to both sides. The width of the expansion slot 34 is smaller than the diameter of the arc-shaped avoidance slot 31.

[0053] In some embodiments, an expansion slot 34 is formed in the pressing plate 1. The expansion slot 34 communicates with the arc-shaped avoidance slot 31. Taking the upper surface of the pressing plate 1 as the reference plane, the projection of the expansion slot 34 on the reference plane is rectangular, and the four corners of the rectangle are rounded. The projection of the arc-shaped avoidance slot 31 on the reference plane is circular, and the center of the circle formed by the projection of the arc-shaped avoidance slot 31 coincides with the center point of the rectangle formed by the projection of the expansion slot 34. During the welding process, the molten slag is likely to splash obliquely upward. The formation of the expansion slot 34 allows the molten slag to fly outwards, reducing the possibility of damage to the battery cell and the connecting member.

[0054] Refer to Figure 2 and Figure 3 , in some embodiments, the depth of the sinking groove 33 is 1.2 - 1.5 mm.

[0055] In some embodiments, the length of the sinking groove 33 in the axial direction of the arc-shaped avoidance slot 31 is 1.2 - 1.5 mm, that is, the depth of the sinking groove is 1.2 - 1.5 mm. This can avoid the situation where the sinking groove 33 is too shallow to fix the welded part of the square connecting stud, improving the welding stability.

[0056] Refer to Figure 2 and Figure 4 , in some embodiments, it further includes a jetting structure 4 for introducing a protective gas into the special-shaped groove 3.

[0057] In some embodiments, a jetting structure 4 is also formed on the battery welding pressing tool provided by the present disclosure. The jetting structure 4 communicates with the special-shaped groove 3. During the welding process, the operator can blow a protective gas to the welding area through the jetting structure 4, playing a role in protecting and stabilizing the welding effect.

[0058] Refer to Figure 2 and Figure 4 , in some embodiments, the jetting structure 4 includes a ventilation groove 41 and an air inlet channel 42. The ventilation groove 41 is connected to the special-shaped groove 3 and is formed as a circumferential ring along the inner circumferential surface of the special-shaped groove 3. The air inlet channel 42 is arranged in the pressing plate 1, and one end of the air inlet channel 42 penetrates through the side wall of the pressing plate 1 to introduce the protective gas.

[0059] In some embodiments, the jet structure 4 includes a ventilation groove 41. The ventilation groove 41 is annular, communicates with the special-shaped groove 3, is located on the inner sidewall of the special-shaped groove 3 and surrounds the circumference of the inner sidewall of the special-shaped groove 3. The jet structure 4 further includes an air inlet channel 42. The air inlet channel 42 is arranged in the pressing plate 1. One end of the air inlet channel 42 communicates with the ventilation groove 41, and the port of this end is the air outlet, which is located on the inner sidewall of the special-shaped groove 3. The other end of the air inlet channel 42 penetrates through the sidewall of the pressing plate 1 and communicates with the outside, and the port of this end is the air inlet for the shielding gas. Through this air inlet, the shielding gas can be introduced into the special-shaped groove 3. The jet structure 4 provided in the present disclosure does not require an additional blowing hose, which not only reduces the space occupation but also does not affect the laser irradiation and the overall layout of the equipment, greatly improving the convenience. At the same time, the ventilation groove 41 is arranged around the welding position, and the ejected shielding gas can fill the surrounding space of the welding position, providing a better protection effect.

[0060] Referring to Figure 1 , in some embodiments, the connecting plate 2 includes a connecting portion 22 and an extending portion 21 arranged obliquely. One end of the extending portion 21 is connected to the pressing plate 1, and the other end of the extending portion 21 is connected to the connecting portion 22.

[0061] In some embodiments, the connecting plate 2 includes an extending portion 21 and a connecting portion 22. When the pressing plate 1 is in a horizontal state, the connecting portion 22 is a long straight plate placed vertically. A connecting groove is formed on the side surface of the connecting portion 22 facing away from the pressing plate 1, which serves to connect the external laser welder. The extending portion 21 is a long straight plate arranged obliquely. One end of the extending portion 21 is connected to the pressing plate 1, and the other end is connected to the connecting portion 22, which serves to connect and at the same time expands the size of the pressing tooling and the available space for welding.

[0062] Referring to Figure 1 , in some embodiments, a plurality of connecting holes 221 are provided on the connecting portion 22, and the multiple connecting holes 221 are arranged in a rectangular array.

[0063] In some embodiments, a plurality of connecting holes 221 are provided on the connecting portion 22. Each connecting hole 221 penetrates the connecting portion 22 in the horizontal direction, and the multiple connecting holes 221 are arranged in a rectangular array on the connecting portion 22, improving the connection stability between the connecting portion 22 and the external laser welder and avoiding loosening during welding.

[0064] An optimal embodiment of a battery welding pressing tooling provided by the present disclosure is as follows: It includes a rectangular pressing plate 1. During welding operations, the pressing plate 1 is placed horizontally and presses the connecting studs on the battery cell housing.

[0065] One side of the pressing plate 1 is integrally formed with a connecting plate 2, and the connecting plate 2 is used to connect an external laser welder.

[0066] Both corners at one end of the pressing plate 1 away from the connecting plate 2 are rounded to eliminate sharpness and avoid scratching other components or operators.

[0067] A special-shaped groove 3 is formed in the pressing plate 1. The special-shaped groove 3 is located in the middle of the pressing plate 1 and penetrates the pressing plate 1 along the thickness direction of the pressing plate 1. The special-shaped groove 3 includes an arc-shaped avoidance groove 31 that penetrates the pressing plate 1. The axial direction of the arc-shaped avoidance groove 31 is set vertically, and the diameter of the arc-shaped avoidance groove 31 is 8 - 10 mm.

[0068] The side of the arc-shaped avoidance groove 31 is connected to a square groove 32. The square groove 32 is arranged vertically, and the penetration direction of the square groove 32 is the same as the axial direction of the arc-shaped avoidance groove 31.

[0069] The bottom of the square groove 32 is connected to a sunk groove 33. The sunk groove 33 is formed on the lower surface of the pressing plate 1. The sunk groove 33 is connected to the arc-shaped avoidance groove 31, and one end of the sunk groove 33 away from the arc-shaped avoidance groove 31 penetrates the side wall of the pressing plate 1 to communicate with the outside. The length of the sunk groove 33 in the axial direction of the arc-shaped avoidance groove 31 is 1.2 - 1.5 mm, that is, the depth of the sunk groove is 1.2 - 1.5 mm.

[0070] Taking the upper surface of the pressing plate 1 as the reference plane, the projection of the arc-shaped avoidance groove 31 on the reference plane is circular, the projection of the square groove 32 on the reference plane is rectangular, and the projection of the sunk groove 33 on the reference plane is rectangular. The above-mentioned circle partially overlaps with the two above-mentioned rectangles, and the rectangle formed by the projection of the square groove 32 is completely wrapped by the rectangle formed by the projection of the sunk groove 33.

[0071] An expansion groove 34 is formed in the pressing plate 1. The expansion groove 34 communicates with the arc-shaped avoidance groove 31. The projection of the expansion groove 34 on the reference plane is rectangular, and the four corners of the rectangle are rounded. The center of the circle formed by the projection of the arc-shaped avoidance groove 31 coincides with the center point of the rectangle formed by the projection of the expansion groove 34.

[0072] The battery welding and pressing tooling provided by the present disclosure is also provided with a jet structure 4. The jet structure 4 communicates with the special-shaped groove 3. The jet structure 4 includes a ventilation groove 41. The ventilation groove 41 is annular. The ventilation groove 41 communicates with the special-shaped groove 3. The ventilation groove 41 is located on the inner side wall of the special-shaped groove 3 and surrounds the circumference of the inner side wall of the special-shaped groove 3. The jet structure 4 further includes an air inlet channel 42. The air inlet channel 42 is arranged in the pressing plate 1. One end of the air inlet channel 42 communicates with the ventilation groove 41. The port of this end is the air outlet. The air outlet is located on the inner side wall of the special-shaped groove 3. The other end of the air inlet channel 42 penetrates through the side wall of the pressing plate 1 and communicates with the outside. The port of this end is the inlet port of the shielding gas. The shielding gas can be introduced into the special-shaped groove 3 through this inlet port.

[0073] The connecting plate 2 includes an extension part 21 and a connecting part 22. The connecting part 22 is a long straight plate placed vertically. A connecting groove is provided on the side surface of the connecting part 22 facing away from the pressing plate 1, which serves to connect an external laser welder. The extension part 21 is a long straight plate arranged obliquely. One end of the extension part 21 is connected to the pressing plate 1, and the other end is connected to the connecting part 22, which serves to connect.

[0074] A plurality of connecting holes 221 are provided on the connecting part 22. Each connecting hole 221 penetrates through the connecting part 22 in the horizontal direction. The plurality of connecting holes 221 are arranged in a rectangular array.

[0075] When welding a circular connecting stud with the battery welding and pressing tooling provided by the present disclosure, the circular connecting stud is placed on the battery cell housing. The battery welding and pressing tooling presses downwards, so that the stepped surface of the circular connecting stud is caught in the arc-shaped avoidance groove 31, and the stud body extends upwards along the arc-shaped avoidance groove 31 to complete the circumferential limit. Then, it continues to press downwards until the lower surface of the pressing plate 1 abuts against the upper surface of the welding part, thereby completing the pressing and fixing operation.

[0076] When welding a square connecting stud with the battery welding and pressing tooling provided by the present disclosure, the square connecting stud is placed on the battery cell housing. The battery welding and pressing tooling presses downwards, so that the stepped surface of the square connecting stud sinks into the sinking groove 33, and the stud body extends into the square groove to complete the circumferential limit. Then, it continues to press downwards until the lower surface of the pressing plate 1 abuts against the upper surface of the welding part, thereby completing the pressing and fixing operation.

[0077] Therefore, the battery welding and pressing tooling provided by the present disclosure can place connecting studs of different shapes in the special-shaped groove 3. The pressing plate 1 performs vertical limitation on the connecting stud, and the special-shaped groove 3 performs circumferential limitation on the connecting stud. The special-shaped groove 3 cooperates with the pressing plate 1 to fix the connecting stud, ensuring the welding quality of laser welding and avoiding the phenomenon of false welding.

[0078] The battery welding and pressing tooling provided by the present disclosure can meet the welding requirements of connection studs with various shapes simultaneously, without the need to replace the pressing tooling during the welding process. It has a simple structure, is convenient to use, and improves the processing efficiency.

[0079] On the other hand, the present disclosure provides a welding device, which includes the above-mentioned battery welding and pressing tooling.

[0080] The welding device includes a handheld laser welding machine. Before the welding operation, the operator inserts a fixing bolt into the connection hole 221 on the connecting plate 2 and connects it to the handheld laser welding machine, thereby installing the above-mentioned battery welding and pressing tooling on the handheld laser welding machine. Then, the operator presses down the pressing tooling so that the connection stud is pressed, and then uses the handheld laser welding machine to weld the connection stud to complete the operation.

[0081] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0082] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A battery welding and pressing tool, characterized in that: include: A clamping plate (1), the clamping plate (1) being adapted to abut against the welding portion and clamp the connecting stud; A connecting plate (2), the connecting plate (2) being connected to the pressing plate (1), the connecting plate (2) being used for connecting to an external laser welder; and A special-shaped groove (3), wherein the special-shaped groove (3) is provided on the clamping plate (1) and penetrates the clamping plate (1) along the thickness direction of the clamping plate (1), and the special-shaped groove (3) is suitable for circumferentially limiting the connecting stud.

2. The battery welding and pressing tool according to claim 1, characterized in that: The special-shaped groove (3) comprises an arc-shaped avoidance groove (31), a square groove (32) and a sinking groove (33); the arc-shaped avoidance groove (31), the square groove (32) and the sinking groove (33) are connected to each other; the penetration direction of the square groove (32) is consistent with the axial direction of the arc-shaped avoidance groove (31); the sinking groove (33) is located on a side surface of the clamping plate (1) away from the connecting plate (2); and the sinking groove (33) is located at one end of the penetration direction of the square groove (32).

3. The battery welding and pressing tool according to claim 2, characterized in that: The diameter of the arc-shaped avoidance groove (31) is 8 to 10 mm.

4. The battery welding and pressing tool according to claim 2 or 3, characterized in that: The pressing plate (1) is provided with an expansion groove (34), the expansion groove (34) being in communication with the arc-shaped avoidance groove (31), the expansion groove (34) extending to both sides with the arc-shaped avoidance groove (31) as the center, and the width of the expansion groove (34) being smaller than the diameter of the arc-shaped avoidance groove (31).

5. The battery welding and pressing tool according to claim 2, characterized in that: The depth of the sink (33) is 1.2-1.5 mm.

6. The battery welding and pressing tool according to claim 1, characterized in that: It also includes an injection structure (4) for introducing protective gas into the special-shaped groove (3).

7. The battery welding and pressing tool according to claim 6, characterized in that: The jet structure (4) comprises a ventilation groove (41) and an inlet flow channel (42); the ventilation groove (41) is connected to the special-shaped groove (3) and is formed circumferentially along the inner peripheral surface of the special-shaped groove (3); the inlet flow channel (42) is arranged in the clamping plate (1); one end of the inlet flow channel (42) passes through the side wall of the clamping plate (1) to allow the protective gas to enter.

8. The battery welding and pressing tool according to claim 1, characterized in that: The connecting plate (2) comprises a connecting portion (22) and an inclined extending portion (21), one end of the extending portion (21) is connected to the pressing plate (1), and the other end of the extending portion (21) is connected to the connecting portion (22).

9. The battery welding and pressing tool according to claim 8, characterized in that: A plurality of connection holes (221) are provided on the connection portion (22), and the plurality of connection holes (221) are arranged in a rectangular array.

10. A welding device, characterized in that: It comprises the battery welding and pressing tool as described in any one of claims 1 to 9.

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