Jig and equipment for lithium ion battery tab welding

Abstract

The jig comprises a base, at least one first taper hole is formed in the base, a to-be-welded tab and a battery extend into the first taper hole, a frustum matched with the first taper hole is formed in a cover plate, a second taper hole is formed in the center of the frustum, and a plurality of air inlet holes are formed in the periphery of the second taper hole. After at least part of the frustum extends into the first taper hole, the cover plate and the base are connected, a first airflow channel communicated with the air inlet hole is formed between the opposite end faces of the frustum, and a second airflow channel communicated with the first airflow channel is formed between the part, extending into the second taper hole, of the frustum and the inner wall of the second taper hole. The adjusting piece is used for connecting the base and the cover plate, and the sealing piece is an elastic piece and can deform under stress. The size of the airflow channel can be flexibly controlled by adjusting the adjusting piece and the sealing piece under the action of external force so as to adapt to the size change. In addition, the utility model further discloses equipment for welding the lithium ion battery tab.

Description

Technical Field

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

[0002] Tab welding is a critical step in lithium-ion battery manufacturing, and weld quality directly impacts battery performance and safety. To ensure weld quality, shielding gas is often used during the welding process. Nitrogen effectively prevents oxidation in the weld area, improving weld stability and quality.

[0003] In related technologies, nitrogen ring structures have a relatively fixed design and are typically installed based on battery size and the specific location of the tabs. These nitrogen rings are typically used in conjunction with welding equipment, supplying nitrogen to the weld area through fixed nitrogen injection holes. During the welding process, the nitrogen ring is stabilized around the weld area by a robotic arm or fixture, ensuring continuous and even nitrogen coverage of the weld.

[0004] However, the existing nitrogen ring structure has significant limitations. This is primarily due to the fact that when battery sizes and tab positions change, the existing fixed nitrogen ring structure cannot adapt, requiring corresponding tooling replacement. Different tab welding positions require readjusting the welding equipment, or even replacing the entire nitrogen ring structure, a complex operation. Utility Model Content

[0005] The main purpose of the utility model is to provide a fixture for welding the tabs of lithium-ion batteries, aiming to solve the problem that when the size and tab position of the battery change, the corresponding tooling needs to be replaced.

[0006] To achieve the above-mentioned purpose, the present invention provides a fixture for welding the tabs of lithium-ion batteries, the fixture for welding the tabs of lithium-ion batteries comprising:

[0007] The base is arranged in an elongated strip shape and has at least one first tapered hole configured in its height direction for inserting the tabs to be welded and the battery;

[0008] a cover plate, disposed on the top surface of the base, the cover plate being constructed with a frustum matched with the first conical hole, the center of the frustum being constructed with a second conical hole, a plurality of air inlet holes being arranged around the periphery of the second conical hole, the frustum at least partially extending into the first conical hole, and when the cover plate and the base are connected, a first air flow channel communicating with the air inlet holes is formed between their opposing end surfaces, and a second air flow channel communicating with the first air flow channel is formed between the portion of the frustum extending into the second conical hole and the inner wall of the second conical hole;

[0009] The adjusting component includes an adjusting member and a sealing member. The adjusting member is used to connect the base and the cover. The sealing member is arranged between the base and the cover. The sealing member is an elastic member that can be deformed under force.

[0010] In some embodiments, the portion of the frustum extending into the first conical hole is annular, and the second air flow channel is an annular air flow channel.

[0011] In some embodiments, a plurality of screw holes are provided around the tapered hole, the adjusting member is a bolt, and the cover plate and the base are connected by the bolts.

[0012] In some embodiments, a receiving portion is configured on a side of the cover plate facing the base, and the receiving portion is used to receive the sealing member.

[0013] In some embodiments, a plurality of the first tapered holes are sequentially and spaced apart from each other on the cover plate, and each of the first tapered holes is connected to the frustum;

[0014] The plurality of second tapered holes are sequentially and spaced apart from each other on the base, and the plurality of second tapered holes correspond one-to-one to the plurality of first tapered holes.

[0015] In some embodiments, at least one screw hole is configured between adjacent first tapered holes, and at least one threaded hole is configured between adjacent second tapered holes.

[0016] In some embodiments, the receiving portion is configured around each of the first tapered holes.

[0017] In some embodiments, the receiving portion is disposed around the plurality of first tapered holes.

[0018] In some embodiments, a plurality of the air inlet holes are arranged around each of the first conical holes.

[0019] The present invention further provides a device for welding lithium-ion battery tabs, comprising the jig of the aforementioned embodiment.

[0020] The beneficial effect of this utility model's technical solution lies in: the design of the base and cover forms an adjustable airflow channel structure. Combined with the adjustment parts and seals in the adjustment assembly, when the battery size or the tab welding position changes, there is no need to frequently replace the tooling. Simply adjusting the adjustment parts and seals under the action of external forces can flexibly control the size of the airflow channel to adapt to the size change. This effectively reduces the tooling replacement and debugging time caused by different battery sizes and welding requirements during the production process, greatly improving production efficiency and reducing operational complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a front view of a fixture for welding lithium-ion battery tabs in one embodiment of the present invention;

[0022] Figure 2 for Figure 1 Cross-section at AA in the middle;

[0023] Figure 3 This is a structural diagram of a fixture for welding lithium-ion battery tabs in one embodiment of the present invention;

[0024] Figure 4 This is an exploded view of a fixture for welding lithium-ion battery tabs in one embodiment of the present invention.

[0025] Description of Figure Numbers:

[0026] 100, base; 101, first tapered hole; 102, threaded hole; 200, cover plate; 201, second tapered hole; 202, air inlet; 203, frustum; 301, first air flow channel; 302, second air flow channel; 303, annular injection port; 400, adjustment component; 401, sealing member; 402, threaded hole; 404, adjustment member; 403, accommodating portion.

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described 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 creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0031] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0032] Reference Figure 1 and Figure 2 , Figure 1 This is a front view of a fixture for welding lithium-ion battery tabs in one embodiment of the present invention. Figure 2 for Figure 1 Cross-section view at AA in the middle.

[0033] The embodiment of the present invention provides a fixture for welding lithium-ion battery tabs, comprising:

[0034] The base 100 is arranged in an elongated strip shape and has at least one first tapered hole 101 in its height direction for inserting the tabs to be welded and the battery;

[0035] The cover plate 200 is provided on the top surface of the base 100. The cover plate 200 is constructed with a frustum 203 that matches the first conical hole 101. The center of the frustum 203 is constructed with a second conical hole 201. A plurality of air inlet holes 202 are arranged around the second conical hole 201. The frustum 203 at least partially extends into the first conical hole 101. When the cover plate 200 and the base 100 are connected, a first airflow channel 301 communicating with the air inlet holes 202 is formed between their opposing end surfaces. A second airflow channel 302 communicating with the first airflow channel 301 is formed between the portion of the frustum 203 that extends into the second conical hole 201 and the inner wall of the second conical hole 201.

[0036] The adjustment assembly 400 includes an adjustment member and a sealing member 401. The adjustment member 404 is used to connect the base 100 and the cover 200. The sealing member 401 is arranged between the base 100 and the cover 200. The sealing member 401 is an elastic member that can be deformed under force.

[0037] In this embodiment, the fixture for lithium-ion battery tab welding includes a base 100 , a cover plate 200 and an adjustment assembly 400 .

[0038] The base 100 primarily supports various components. Its first tapered hole 101 allows the battery and the tab to be welded to enter, ensuring smooth welding. The base 100 can be designed in a variety of shapes, such as rectangular, square, or circular. To withstand the high temperatures generated during welding, the base 100 should be constructed from a material with strong heat resistance, such as metal materials such as aluminum alloy or stainless steel.

[0039] The cover plate 200 is movably mounted on the base 100 and has a second tapered hole 201 and an air inlet 202 for controlling airflow during welding. A frustum 203 is also designed on one side of the cover plate 200, which interfaces with the second tapered hole 201. The frustum 203 partially extends into the first tapered hole 101, forming an airflow channel connected to the air inlet 202. The cover plate 200 and the first and second tapered holes 101, 201 of the base 100 can be manufactured through integral molding or post-processing to ensure structural precision and strength.

[0040] The regulating component 400 may use a sealing member 401 made of elastic material, which is placed between the base 100 and the cover 200 and can adjust the size of the airflow channel under the action of external force, thereby controlling the flow of gas.

[0041] During actual use, the battery and the tabs to be welded are first placed in the first tapered hole 101 of the base 100 and the second tapered hole 201 of the cover 200, and then welding equipment such as a welding gun is inserted into the tapered holes for welding.

[0042] To accommodate the welding needs of batteries of varying sizes, the cover 200 and base 100 are locked with bolts (also known as adjustment members 404), thereby compressing the seal 401 and reducing the size of the first and second airflow channels 301 and 302. As the battery size changes, the bolts are gradually loosened, and the seal 401, thanks to its elasticity, rebounds to its original shape, supporting itself between the cover 200 and base 100, restoring a larger airflow channel. By adjusting the size of the airflow channel, the system can flexibly adapt to changes in battery size while ensuring effective gas protection during welding.

[0043] In the technical solution of this embodiment, an adjustable airflow channel structure is formed by the design of the base 100 and the cover plate 200. In combination with the adjustment member 404 and the seal 401 in the adjustment assembly 400, when the battery size or the tab welding position changes, the size of the airflow channel can be flexibly controlled to adapt to the size change by simply adjusting the adjustment member 404 and the adjustment seal 401 under the action of external force. In this way, the tooling replacement and debugging time caused by different battery sizes and welding requirements during the production process is effectively reduced, greatly improving production efficiency and reducing operational complexity. In addition, the device can ensure that the nitrogen flow rate is always reasonably distributed during the welding process of batteries of different sizes, thereby improving welding quality, reducing defects caused by uneven welding protection, and further reducing manpower and material costs.

[0044] See Figure 2 and Figure 3 , Figure 2 for Figure 1 The cross-section at AA in the middle, Figure 3 This is a structural diagram of a fixture for welding lithium-ion battery tabs in one embodiment of the present invention.

[0045] In this embodiment, the portion of the frustum 203 extending into the first conical hole 101 is annular, and the second air flow channel 302 is an annular air flow channel;

[0046] In this embodiment, the portion of the frustum 203 extending into the first tapered hole 101 is annular, forming the second airflow channel 302. This annular structure ensures that the airflow is evenly distributed around the welding area, improving nitrogen coverage during welding and effectively preventing oxidation during welding.

[0047] In some embodiments, an annular injection port 303 communicating with the second air flow channel 302 is formed between the distal end of the frustum 203, i.e., the end away from the cover plate 200, and the inner wall of the first tapered hole 101. Through the annular injection port 303, nitrogen can be ejected from the channel in a uniform and stable manner, forming a complete nitrogen protective layer around the welding area.

[0048] While traditional linear or localized airflow may not fully cover the weld area, annular airflow channels and nozzles ensure 360-degree coverage of the weld area, ensuring consistent weld quality. Furthermore, the annular airflow evenly distributes nitrogen around the weld point, reducing weld defects and uneven welds, further improving weld precision and consistency.

[0049] In some embodiments, the seal 401 is an elastic member. This elastic member is typically made of a material with good resilience and high temperature resistance, such as silicone rubber or fluororubber, and can be compressed or expanded under external force. When the cover 200 is bolted to the base 100, the seal 401 is compressed, thereby adjusting the size of the first airflow channel 301 and the second airflow channel 302. When the bolts are gradually loosened, the seal 401 can return to its original shape due to its own elasticity, supporting itself between the cover 200 and the base 100, and readjusting the width of the airflow channel.

[0050] The use of elastic components allows for flexible adaptation to varying battery sizes and welding requirements, reducing reliance on fixed structures. This not only improves the versatility and adaptability of the device, but also ensures continuity and stability in airflow path changes. Furthermore, the elastic components maintain their functionality through repeated use, extending the life of the fixture and reducing maintenance costs.

[0051] Continue reading Figure 3 In this embodiment, a plurality of screw holes 402 are provided around the second tapered hole 201, the adjusting member 404 is a bolt, and the cover plate 200 and the base 100 are connected by bolts.

[0052] In this embodiment, when the airflow channel needs to be narrowed to enhance airflow concentration during welding, the user first tightens adjustment member 404 (bolt). Tightening the bolt compresses the gap between cover plate 200 and base 100, reducing the area of ​​the airflow channel. This allows the user to quickly and efficiently adjust the size of the airflow channel, ensuring more precise gas coverage of the welding area.

[0053] When the airflow channel needs to be increased, that is, when the welding conditions change and the airflow channel needs to be increased to increase the airflow, the user first loosens the adjustment member 404 (bolt). When the bolt is loosened, the elastic force of the seal causes the cover plate 200 and the base 100 to be pushed open, forming a larger airflow channel. In this way, the user can adjust the height of the air cover plate and the base according to the size changes of the battery and the tabs to be welded to achieve the desired airflow channel size. Finally, re-tighten the bolt to ensure a stable connection between the cover plate and the base in the new position.

[0054] Continue reading Figure 2 In this embodiment, a receiving portion 403 is configured on a side of the cover plate 200 facing the base 100 , and the receiving portion 403 is used to receive the sealing member 401 .

[0055] In this embodiment, a receiving portion 403 is designed on the side of the cover 200 facing the base 100. The receiving portion 403 is specifically designed to accommodate the sealing member 401. The size and shape of the receiving portion 403 match the sealing member 401, ensuring that the sealing member 401 can be firmly embedded therein and will not shift or loosen between the cover 200 and the base 100.

[0056] Receptacle 403 can be integrally formed directly with cover plate 200. This manufacturing method ensures structural integrity and strength, reducing the complexity and potential errors of subsequent processing. Alternatively, receptacle 403 can be formed after cover plate 200 is formed through post-processing methods such as machining or CNC milling. This method allows for precise adjustment of the size and shape of receptacle 403 to meet specific needs, ensuring a perfect fit with seal 401. Both methods ensure the structural stability of receptacle 403, thereby effectively improving the sealing performance of the device.

[0057] This structural design effectively optimizes the installation position of seal 401. First, by securing seal 401 within housing 403 of cover plate 200, the sealing performance of the entire device is improved, preventing leakage of shielding gas in the airflow path, thereby ensuring that nitrogen fully covers the welding area during welding. Second, housing 403 also increases the stability of seal 401, preventing unnecessary displacement or dislodging during use, further improving the reliability and service life of the device. Therefore, this improved design not only enhances the effectiveness of welding protection, but also strengthens the safety and efficiency of the entire device.

[0058] Continue reading Figure 3 In this embodiment, a plurality of first tapered holes 101 are sequentially and spaced apart from each other on the cover plate 200 , and each first tapered hole 101 is connected to a frustum 203 ;

[0059] The plurality of second tapered holes 201 are sequentially and spaced apart from each other on the base 100 , and the plurality of second tapered holes 201 correspond one-to-one to the plurality of first tapered holes 101 .

[0060] In this embodiment, a plurality of first tapered holes 101 are sequentially and spaced apart on the cover plate 200, with each first tapered hole 101 abutting a frustum 203. These frustums 203 extend from the cover plate 200 to corresponding areas of the base 100. Simultaneously, a plurality of second tapered holes 201 are also sequentially and spaced apart on the base 100, corresponding one-to-one with the plurality of first tapered holes 101 to form a plurality of welding locations.

[0061] This design allows for simultaneous welding of multiple tabs, significantly improving welding efficiency. During welding, multiple airflow channels operate simultaneously, each independently protecting its own welding area. This not only enhances operational flexibility, eliminating the need for frequent adjustments and repositioning, but also allows for flexible configuration of the number and location of tapered holes based on the specific welding task.

[0062] Furthermore, the spacing of the multiple first and second tapered holes 101 and 201 enhances the device's versatility. Regardless of the number, size, or position of the battery tabs being welded, the device can adapt to varying welding requirements by simply adjusting the position and number of the first and second tapered holes 201. This structure not only reduces the frequency of tooling changes, but also reduces operational complexity and costs, while ensuring uniform nitrogen protection at each weld point, improving welding quality and efficiency.

[0063] Continue reading Figure 3 In this embodiment, at least one screw hole 402 is configured between adjacent first tapered holes 101 .

[0064] In this embodiment, each screw hole 402 corresponds to a plurality of first and second tapered holes, specifically providing entry locations for connecting bolts. This design allows each welding position to have an independent screw hole, ensuring that the airflow channel at each welding position can be maintained within a preset range, thereby obtaining sufficient shielding gas coverage.

[0065] In some embodiments, an accommodating portion 403 is configured around each first tapered hole 101 .

[0066] In this embodiment, a receiving portion 403 is separately provided around each first tapered hole 101, specifically for accommodating a seal 401. Each receiving portion 403 independently matches a corresponding first tapered hole 101, thereby ensuring that the seal 401 is precisely installed around each tapered hole and providing reliable sealing and airflow control during the welding process.

[0067] The advantage of this design is that each seal 401 can function independently, secured and supported by its respective housing 403, preventing displacement or loosening during welding. The housing 403 ensures closer contact between the seal 401, the cover 200, and the base 100, effectively improving the sealing of the airflow channel and reducing the risk of gas leakage.

[0068] In addition, the design of the individually provided receiving portion 403 allows the seal 401 to more flexibly adapt to changes in different sizes and welding positions. The independence of each receiving portion 403 ensures stability and versatility under different welding requirements, thereby further improving the accuracy and operating efficiency of the device.

[0069] See Figure 4 In this embodiment, the accommodation portion 403 is arranged around the plurality of first tapered holes 101 .

[0070] In this embodiment, the accommodating portion 403 is integrally arranged to surround and enclose multiple first tapered holes 101. Compared to the previous design where each first tapered hole 101 had a separate accommodating portion 403, the accommodating portion 403 in this embodiment is a large, integrated structure, forming a continuous space to accommodate multiple sealing members 401. This design simplifies the structure and ensures that the airflow paths of multiple first tapered holes 101 remain stable within a unified space.

[0071] This integrally enclosing housing 403 enhances structural integrity, ensuring uniform support and sealing of the multiple first tapered holes 101 during welding. The continuous structure of the housing 403 reduces the risk of localized displacement or leaky seals, further enhancing gas flow stability. Furthermore, by enclosing multiple first tapered holes 101 within the same housing 403, gas distribution during welding can be more effectively managed, ensuring that each weld point receives adequate shielding gas coverage.

[0072] This design also offers excellent ease of operation. During maintenance or adjustments, users do not need to adjust the seal of each tapered hole individually; they only need to operate on the overall receiving portion 403. This not only simplifies the operation steps but also improves the versatility and adaptability of the device, making it particularly suitable for applications requiring the simultaneous welding of multiple tabs, thereby further improving production efficiency.

[0073] Continue reading Figure 4 In this embodiment, a plurality of air inlet holes 202 are arranged around each first tapered hole 101 .

[0074] In this embodiment, each air inlet hole 202 is connected to a corresponding air flow channel, forming an independent air flow channel system between each first tapered hole 101 and the second tapered hole 201. Through these air inlet holes 202, shielding gas can be effectively and evenly introduced into the respective air flow channels, ensuring that each welding area is adequately covered by gas.

[0075] The multiple air inlet holes 202 provide dedicated gas supply to each independent airflow channel, preventing gas interference between different airflow channels and improving airflow stability during welding. Each air inlet hole 202 can adjust the gas flow rate according to actual needs, ensuring that gas is accurately distributed to each weld point, avoiding weld defects caused by uneven gas coverage across the weld area.

[0076] Furthermore, by providing corresponding air inlet holes 202 for each independent airflow channel, the operational flexibility and controllability of the entire system are significantly enhanced. Users can adjust the gas flow rate in each airflow channel based on different battery sizes and welding requirements, ensuring optimal protection during welding. This design not only improves welding quality but also reduces energy waste caused by uneven gas distribution, further optimizing equipment efficiency and production costs.

[0077] The present invention further proposes a device for welding lithium-ion battery tabs, which includes the jig for welding lithium-ion battery tabs in the aforementioned embodiment. The specific structure of the jig refers to the aforementioned embodiment. Since the device for welding lithium-ion battery tabs adopts all the technical solutions of all the aforementioned embodiments, it has at least all the technical effects brought about by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0078] This fixture allows the equipment to flexibly adjust the size of the airflow channel during tab welding to accommodate varying welding requirements. By tightening or loosening the bolts, users can quickly adjust the airflow concentration to optimize shielding gas coverage. This flexibility not only improves weld quality but also ensures optimal performance across a wide range of battery sizes and welding conditions.

[0079] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A fixture for welding lithium-ion battery tabs, characterized in that: include: The base is arranged in an elongated strip shape and has at least one first tapered hole configured in its height direction for inserting the tabs to be welded and the battery; a cover plate, disposed on the top surface of the base, the cover plate being constructed with a frustum matched with the first conical hole, the center of the frustum being constructed with a second conical hole, a plurality of air inlet holes being arranged around the periphery of the second conical hole, the frustum at least partially extending into the first conical hole, and when the cover plate and the base are connected, a first air flow channel communicating with the air inlet holes is formed between their opposing end surfaces, and a second air flow channel communicating with the first air flow channel is formed between the portion of the frustum extending into the second conical hole and the inner wall of the second conical hole; The adjusting component includes an adjusting member and a sealing member. The adjusting member is used to connect the base and the cover. The sealing member is arranged between the base and the cover. The sealing member is an elastic member that can be deformed under force.

2. The fixture for lithium-ion battery tab welding according to claim 1, characterized in that: The portion of the frustum extending into the first conical hole is annular, and the second air flow channel is an annular air flow channel.

3. The fixture for lithium-ion battery tab welding according to claim 1, characterized in that: A plurality of screw holes are provided around the second tapered hole, the adjusting member is a bolt, and the cover plate and the base are connected via the bolts.

4. The fixture for lithium-ion battery tab welding according to claim 3, characterized in that: A receiving portion is formed on a surface of the cover plate facing the base, and the receiving portion is used to receive the sealing component.

5. The fixture for lithium-ion battery tab welding according to claim 4, characterized in that: A plurality of the first tapered holes are sequentially and spaced apart from each other on the cover plate, and each of the first tapered holes is connected to the frustum; The plurality of second tapered holes are sequentially and spaced apart from each other on the base, and the plurality of second tapered holes correspond one-to-one to the plurality of first tapered holes.

6. The fixture for lithium-ion battery tab welding according to claim 5, characterized in that: At least one screw hole is configured between adjacent first tapered holes.

7. The fixture for lithium-ion battery tab welding according to claim 5, characterized in that: The receiving portion is configured around each of the first tapered holes.

8. The fixture for lithium-ion battery tab welding according to claim 5, characterized in that: The accommodating portion is disposed around the plurality of first tapered holes.

9. The fixture for lithium-ion battery tab welding according to claim 8, characterized in that: A plurality of air inlet holes are arranged around each of the first conical holes.

10. A device for welding lithium-ion battery tabs, characterized in that: The device comprises the tool according to any one of claims 1 to 9.

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