Welding auxiliary tool

Abstract

The utility model provides a welding auxiliary tool, and relates to the field of welding protection. The welding auxiliary tool comprises a base, a first roll core and a second roll core, the base is configured to place a to-be-welded battery cell top cover, the battery cell top cover is arranged between the first roll core and the second roll core, and tabs of the first roll core and the second roll core are electrically matched with an adapter plate of the battery cell top cover; the protective layer is configured to cover the upper surfaces of the first roll core and the second roll core, and the protective layer is arranged on the upper surfaces of the first roll core and the second roll core and makes contact with the base; and the at least one gas supply device is configured to provide protective gas for the welding point, and the gas supply device is connected with the protective layer. The welding auxiliary tool is provided with the gas supply device for directly providing the shielding gas for the welding spots, so that the welding parts can be effectively protected in the welding process, the consistency of the welding effect is kept, and the situation of welding burst points is avoided; and a protective layer is arranged on the upper surface of the roll core, welding slag is prevented from splashing to the roll core diaphragm, and the welding yield is increased.

Description

Technical Field

[0001] The present application relates to the field of welding auxiliary technology, and in particular to a welding auxiliary tooling. Background Art

[0002] In the assembly process of aluminum batteries, welding processes are mostly involved. For example, the positive and negative pole tabs of the battery roll core and the adapter plate of the battery cell top cover are welded together to allow the internal current of the battery cell to flow smoothly to the external pole. The welding process can use welding auxiliary tooling to fix and protect the components to be welded.

[0003] In the prior art, welding auxiliary tooling generally only serves to fix the components to be welded, and cannot effectively reduce the impact on the battery components during the welding process. For example, the welding slag splashes during the welding process and causes the battery cell diaphragm to be damaged, seriously affecting the appearance and quality of the battery cell. Therefore, there is an urgent need for a welding auxiliary tooling to optimize the welding auxiliary process and reduce the impact on the battery components during the welding process. Utility Model Content

[0004] In view of this, the present application provides a welding auxiliary tool to optimize the welding auxiliary process and reduce the impact on the battery components during the welding process.

[0005] In a first aspect, the present application provides a welding auxiliary tooling, comprising: a base, configured to place a battery cell top cover, a first winding core and a second winding core to be welded, the battery cell top cover is arranged between the first winding core and the second winding core, and the pole ears of the first winding core and the second winding core are electrically matched with the adapter sheet of the battery cell top cover; a protective layer, configured to cover the upper surface of the first winding core and the second winding core, the protective layer is arranged on the upper surface of the first winding core and the second winding core, and contacts with the base; at least one gas supply device, configured to provide protective gas to the welding point, and the gas supply device is connected to the protective layer.

[0006] Optionally, the welding auxiliary tooling further includes: a fixing device configured to fix the battery cell top cover, the first winding core and the second winding core, the fixing device is disposed on the upper surface of the battery cell top cover, and both ends of the fixing device are connected to the base.

[0007] Optionally, the fixing device is a tab pressing plate, which has four vents, and the vents match the gas supply device so that the protective gas provided by the gas supply device reaches the welding point through the vents.

[0008] Optionally, the number of the air supply devices is 4, and each air supply device matches each air vent of the tab pressure plate respectively.

[0009] Optionally, the protective layer includes a first cover plate and a second cover plate, the first cover plate is arranged on the upper surface of the first winding core, and the second cover plate is arranged on the upper surface of the second winding core.

[0010] Optionally, the first cover plate contacts the base through a first fixed portion arranged on the lower surface of the first cover plate, and the first fixed portion is arranged alternately with the pole ears of the first winding core; the second cover plate contacts the base through a second fixed portion arranged on the lower surface of the second cover plate, and the second fixed portion is arranged alternately with the pole ears of the second winding core.

[0011] Optionally, the number of the air supply devices is 4, 2 air supply devices are arranged on the upper surface of the first cover plate, and 2 air supply devices are arranged on the upper surface of the second cover plate.

[0012] Optionally, the tabs of the first winding core and the second winding core are arranged above the adapter plate of the battery cell top cover.

[0013] Optionally, a middle portion of the base has a groove, and the battery cell top cover is arranged inside the groove.

[0014] Optionally, the base is a square structure, and the four vertices of the base are provided with connection parts for fixing the welding auxiliary tooling during welding.

[0015] The welding auxiliary tooling provided in this application has at least the following beneficial effects:

[0016] (1) Since a gas supply device is provided to directly provide protective gas to the welding point, the welding part can be effectively protected during the welding process, the consistency of the welding effect is maintained, and the occurrence of welding explosion points is avoided;

[0017] (2) Since a protective layer is provided on the upper surface of the winding core, welding slag is effectively prevented from splashing onto the winding core diaphragm, thereby improving the welding yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief introduction to the drawings used in describing the embodiments of the present application:

[0019] Figure 1 It is a structural schematic diagram of a welding auxiliary tooling provided in an embodiment of the present application;

[0020] Figure 2 It is a structural schematic diagram of another welding auxiliary tooling provided in an embodiment of the present application;

[0021] Figure 3 This is a structural schematic diagram of another welding auxiliary tooling provided in an embodiment of the present application.

[0022] In the figure: 110 - base, 120 - first cover plate, 130 - second cover plate, 140 - air supply device, 150 - pole ear pressure plate, 210 - battery cell top cover, 220 - first winding core, 230 - second winding core. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. The accompanying drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other accompanying drawings and other implementation methods can be obtained based on these drawings without creative work. Adjustments and improvements made without departing from the concept of the present application are all within the scope of protection of the present application.

[0024] In order to simplify the drawings, only the parts related to the corresponding embodiments are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, only part of the components with the same structure or function in some figures are schematically drawn, and there may be more or fewer components with the same structure or function in reality.

[0025] In this application, unless otherwise clearly specified and limited, ordinal numbers, such as "first", "second", etc., are only used to distinguish and describe associated objects, and cannot be understood as indicating or implying the relative importance or order between associated objects; in addition, they do not represent the number of associated objects. "Multiple" includes two or more, and other quantifiers are similar. " / " is used to describe the relationship between associated objects, which indicates the "or" relationship between associated objects. "And / or" is used to describe the relationship between associated objects, which includes any combination relationship between associated objects, such as "a and / or b" includes: "alone a", "alone b", or "a and b". "One or more" or "at least one" in multiple objects refers to any object or any combination of multiple objects, such as "one or more of a1, a2, a3" or "at least one of a1, a2, a3" includes: "alone a1", "alone a2", "alone a3", "a1 and a2", "a1 and a3", "a2 and a3", or "a1, a2 and a3".

[0026] In the assembly process of aluminum batteries, welding processes are mostly involved. Since the internal components of aluminum batteries rely on reliable electrical connections, the welding process can provide low-resistance and high-strength connections, so that current can be effectively conducted. This is crucial to the performance and efficiency of the battery. For example, welding the positive and negative pole ears of the battery roll core with the adapter of the battery cell top cover can ensure that the current flows smoothly to the external pole. The welding process can also provide a high-strength mechanical connection to ensure that the components will not easily loosen or break during long-term use. This is conducive to improving the overall structural strength and stability of the battery, especially when the battery may experience external stresses such as vibration and impact. In addition, the welding process can meet the requirements of lightweight, automated production, and reduce the maintenance cost of the battery, thereby improving the overall performance and production efficiency of the battery.

[0027] During the welding process, welding auxiliary tooling can be used to fix the components to be welded; welding auxiliary tooling can also play the function of protecting the components. The basic function of welding auxiliary tooling is to fix the components to be welded. By fixing the components in the specified position, they will not move or shift during the welding process, thereby improving the accuracy and consistency of the welding points. In addition, in some welding auxiliary tooling, an artificial shielding gas device is also provided to protect the welding position from oxidation. However, the shielding gas passage in the prior art is a gas pipeline. This setting method has the problem of uneven gas dispersion, which may lead to welding explosion points, affect the appearance of the battery after welding, and may damage the performance of the battery itself. In addition, the welding auxiliary tooling in the prior art does not set a protective layer on the top of the core, resulting in the damage of the battery cell diaphragm due to the splashing of welding slag during the welding process, affecting the appearance and quality of the battery, and may even cause a short circuit after the battery cell is transferred.

[0028] Based on this, the concept of the present application is to provide a welding auxiliary tooling, which can simultaneously fix and protect the components to be welded, and by setting a protective layer on the surface of the winding core and enabling the gas supply device to accurately provide protective gas to the welding points, the welding auxiliary process can be optimized and the impact on the battery components during the welding process can be reduced.

[0029] Please refer to Figure 1 , which shows a schematic diagram of the structure of a welding auxiliary tooling provided in an embodiment of the present application. Figure 1 As shown, the welding auxiliary tooling includes: a base 100, which is configured to place the battery cell top cover 210 to be welded, the first winding core 220 and the second winding core 230, the battery cell top cover 210 is arranged between the first winding core 220 and the second winding core 230, and the tabs of the first winding core 220 and the second winding core 230 and the adapter of the battery cell top cover 210 are electrically matched; a protective layer ( Figure 1 The protective layer is arranged on the upper surface of the first winding core 220 and the second winding core 230, and is in contact with the base 110; at least one gas supply device 140 is arranged to provide a protective gas to the welding point, and the gas supply device is connected to the protective layer. Exemplarily, the protective layer may include Figure 1 The first cover plate 120 and the second cover plate 130 in the embodiment. In some embodiments, the protective layer can also be a whole, that is, the first cover plate 120 and the second cover plate 130 can be connected together.

[0030] When assembling the welding auxiliary tooling, determine the position of the base 110, place the battery cell top cover 210, the first winding core 220 and the second winding core 230 to be welded on the base 110, and the battery cell top cover 210 is located between the first winding core 220 and the second winding core 230. Place the tabs of the first winding core 220 and the second winding core 230 and the adapter of the battery cell top cover 210 together and make them in an electrically matched state, that is, the positive and negative poles are connected to each other. The connection between the tabs of the first winding core 220 and the second winding core 230 and the adapter of the battery cell top cover 210 is the welding point. In some embodiments, the first winding core 220 has a positive pole tab and a negative pole tab, and the second winding core 230 also has a positive pole tab and a negative pole tab. At this time, the connection position of the four tabs and the adapter of the battery cell top cover 210 is the four welding points.

[0031] The protective layer is disposed on the upper surface of the first winding core 220 and the second winding core 230, so that the protective layer can cover the upper surface of the first winding core 220 and the second winding core 230, so that the welding slag splashed during the welding process will not damage the diaphragm on the surface of the first winding core 220 and the second winding core 230. In some embodiments, the protective layer is in contact with the base 110, so that the protective layer can cover the exposed side surfaces of the first winding core 220 and the second winding core 230, further reducing the damage of the first winding core 220 and the second winding core 230 caused by the welding slag splashing during the welding process.

[0032] At least one gas supply device 140 is provided, and the gas supply device 140 is connected to the protective layer to provide protective gas to the welding points during welding, so that the welding points can be evenly protected by the inert gas, and the occurrence of welding explosion points can be effectively reduced. Exemplary inert gases can be, for example, helium, neon, argon, krypton, xenon and radon. In some embodiments, a gas supply device 140 can be provided, and during welding, the air port of the gas supply device 140 can be aimed at the welding point currently in use; in this way, the precise supply of protective gas can be achieved, so that the welding point will not cause oxidation discoloration due to contact with the air after welding, and the consistency of the welding effect can be maintained. In other embodiments, it can be as follows Figure 1 As shown, four gas supply devices 140 are arranged respectively on the first cover plate 120 and the second cover plate 130, and the gas outlet of each gas supply device 140 is respectively aimed at a welding point, that is, the connection parts of the positive and negative pole ears of the first winding core 220, the positive and negative pole ears of the second winding core 230 and the adapter plate of the battery cell top cover 210; in this way, the protective gas can be provided for a long time during welding, and there is no need to change the position of the gas supply device 140 during welding, thereby reducing the trouble of manual operation.

[0033] After welding is completed, the gas supply device 140 and the protective layer are taken out in turn to obtain the welded product. At this time, the first winding core 220 and the second winding core 230 are respectively welded on both sides of the battery cell top cover 210, and the two winding cores are electrically matched with the adapter sheet of the battery cell top cover 210.

[0034] In this embodiment, since a gas supply device is provided to directly provide protective gas to the welding point, the welding part can be effectively protected during the welding process, the consistency of the welding effect can be maintained, and the occurrence of welding explosion points can be avoided; since a protective layer is provided on the upper surface of the core, the welding slag is effectively prevented from splashing onto the core diaphragm, thereby improving the welding yield.

[0035] In some embodiments, please continue to refer to Figure 1 , the tabs of the first winding core 220 and the second winding core 230 are arranged above the adapter plate of the battery cell top cover 210. Since the battery cell will generate heat during the charging and discharging process, arranging the tabs above the adapter plate of the battery cell top cover 210 can improve the heat dissipation effect. The top cover is generally made of metal material with good thermal conductivity, which helps to conduct heat away faster, reduce the temperature inside the battery cell, and prevent overheating. Moreover, in the design of the battery, the connection method between the battery cell top cover 210 and the tabs can also effectively avoid the risk of short circuit caused by the tabs contacting other components, thereby improving the safety of the battery.

[0036] Based on this, in some implementations, please continue to refer to Figure 1 , the middle part of the base 110 has a groove, and the battery cell top cover 210 is arranged inside the groove. The size of the groove can just match the size of the battery cell top cover 210 or be slightly larger than the size of the battery cell top cover 210. The groove arranged in the middle part of the base 110 is used to place the battery cell top cover 210, so that the first winding core 220 and the second winding core 230 can be naturally placed on both sides of the battery cell top cover 210, satisfying the relative position relationship between the battery cell top cover 210, the first winding core 220 and the second winding core 230. Moreover, by arranging the battery cell top cover 210 in the groove, the purpose of fixing the assembly to be welded can be further achieved; in this way, during the welding process, the battery cell top cover 210 is not easily displaced. At the same time, the battery cell top cover 210 is set in the groove. From a physical structure point of view, the relative height of the adapter plate of the battery cell top cover 210 can be reduced, making it easier for the pole ears of the first winding core 220 and the second winding core 230 to be set above the adapter plate of the battery cell top cover 210, thereby making the overall structure of the welding auxiliary tooling more interconnected.

[0037] In some embodiments, please continue to refer to Figure 1The base 110 is a square structure, and the four vertices of the base 110 are provided with connection parts for fixing the welding auxiliary tooling during welding. During the welding process, the welding tooling as a whole may also be displaced due to interference from external factors, which may affect the welding process. The four vertices of the base 110 are provided with connection parts, such as internal threads. During the welding process, the base 110 can be fixed on the workbench using screws with matching external threads, so as to further increase the stability of welding.

[0038] In some embodiments, please continue to refer to Figure 1 The welding auxiliary tooling also includes: a fixing device, which is configured to fix the cell top cover 210, the first winding core 220 and the second winding core 230, and the fixing device is arranged on the upper surface of the cell top cover 210, and the two ends of the fixing device are connected to the base 110. Exemplarily, the fixing device is a tab pressing plate 150, and the tab pressing plate 150 has four vents, and the vents match the gas supply device 140, so that the protective gas provided by the gas supply device 140 reaches the welding point through the vents.

[0039] The setting of the fixing device can further fix the battery cell top cover 210, the first winding core 220 and the second winding core 230 together during the welding process, reducing the possibility of displacement of the components to be welded. The two ends of the fixing device are connected to the base 110 so that it will not be displaced significantly during the welding process. The selection of the fixing device can be as follows: Figure 1 As shown, a tab pressing plate 150 with four vents is shown. The four vents of the tab pressing plate 150 are respectively located on the four welding points disclosed in the above embodiment, and the gas outlet of the gas supply device 140 can match the vents of the tab pressing plate 150, further enabling the shielding gas to be accurately injected into the welding position during the welding process, reducing the impact of the welding process on the battery itself.

[0040] When assembling the welding auxiliary tooling, after the battery cell top cover 210, the first winding core 220 and the second winding core 230 are placed, the tab pressure plate 150 can be placed on top of the battery cell top cover 210, so that it fixes the battery cell top cover 210, the first winding core 220 and the second winding core 230, and at the same time, the connection parts at both ends of the tab pressure plate 150 are connected to the base 110. Exemplarily, the two ends of the tab pressure plate 150 can be connected to the base 110 in a nested manner, or a certain length of external thread can be set at the corresponding part of the base 110, and after the tab pressure plate 150 is placed, two additional nuts with internal threads are used to fix it. The specific connection method is not limited in this embodiment. Similarly, when disassembling the welding auxiliary tooling, the tab pressure plate 150 is additionally removed before taking out the finished product after welding.

[0041] In some embodiments, please continue to refer to Figure 1, the protective layer includes a first cover plate 120 and a second cover plate 130, the first cover plate 120 is disposed on the upper surface of the first winding core 220, and the second cover plate 130 is disposed on the upper surface of the second winding core 230. The protective layer is divided into the first cover plate 120 and the second cover plate 130, which are respectively used to protect the surfaces of the first winding core 220 and the second winding core 230. Exemplarily, if the sizes of the first winding core 220 and the second winding core 230 are equal, the sizes of the first cover plate 120 and the second cover plate 130 may also be equal.

[0042] In some embodiments, please continue to refer to Figure 1 The first cover plate 120 contacts the base 110 via a first fixing portion disposed on the lower surface of the first cover plate 120 , and the first fixing portion is staggered with the pole ears of the first winding core 220 ; the second cover plate 130 contacts the base 110 via a second fixing portion disposed on the lower surface of the second cover plate 130 , and the second fixing portion is staggered with the pole ears of the second winding core 230 .

[0043] By setting the first fixing part and the second fixing part, the side of the first winding core 220 and the second winding core 230 close to the welding part can be further protected to reduce the influence of welding slag generated by welding on them. In addition, the staggered arrangement of the fixing parts and the tabs can facilitate the assembly of the welding auxiliary tooling.

[0044] In some embodiments, please continue to refer to Figure 1 The number of the air supply devices 140 is 4, two of which are disposed on the upper surface of the first cover plate 120, and two of which are disposed on the upper surface of the second cover plate 130. At this time, the air outlets of the four air supply devices 140 are respectively aligned with the four welding points.

[0045] Please refer to Figure 2 and Figure 3 , which show a schematic structural diagram of a welding auxiliary tooling provided in an embodiment of the present application. Figure 2 and Figure 3 As shown, after the welding auxiliary tooling is assembled, the base 110, the first cover plate 120, the second cover plate 130, the gas supply device 140 and the tab pressing plate 150 can be seen from the external perspective (general assembly drawing and top view); and the parts to be welded, that is, the battery cell top cover 210, the first winding core 220 and the second winding core 230 are all covered by the protective layer composed of the first cover plate 120 and the second cover plate 130, so they are not visible from the external perspective. In this way, the welding slag generated during the welding process is not easy to damage the winding core film.

[0046] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. In addition, the above embodiments can be freely combined as needed.

Claims

1. A welding auxiliary tool, characterized in that: include: A base, configured to place a cell top cover, a first winding core, and a second winding core to be welded, wherein the cell top cover is disposed between the first winding core and the second winding core, and the tabs of the first winding core and the second winding core are electrically matched with the adapter of the cell top cover; A protective layer, configured to cover the upper surfaces of the first winding core and the second winding core, the protective layer being disposed on the upper surfaces of the first winding core and the second winding core and in contact with the base; At least one gas supply device is configured to provide shielding gas to the welding point, and the gas supply device is connected to the shielding layer.

2. The welding auxiliary tooling according to claim 1, characterized in that: Also includes: A fixing device is configured to fix the battery cell top cover, the first winding core and the second winding core. The fixing device is arranged on the upper surface of the battery cell top cover, and two ends of the fixing device are connected to the base.

3. The welding auxiliary tooling according to claim 2, characterized in that: The fixing device is a tab pressing plate, which has four vents, and the vents match the gas supply device so that the protective gas provided by the gas supply device reaches the welding point through the vents.

4. The welding auxiliary tooling according to claim 3, characterized in that: The number of the air supply devices is 4, and each of the air supply devices matches each of the air holes of the tab pressure plate.

5. The welding auxiliary tooling according to claim 1, characterized in that: The protective layer includes a first cover plate and a second cover plate, wherein the first cover plate is disposed on an upper surface of the first winding core, and the second cover plate is disposed on an upper surface of the second winding core.

6. The welding auxiliary tooling according to claim 5, characterized in that: The first cover plate is in contact with the base through a first fixing portion provided on the lower surface of the first cover plate, and the first fixing portion is arranged alternately with the tabs of the first winding core; The second cover plate contacts the base via a second fixing portion disposed on a lower surface of the second cover plate, and the second fixing portion is arranged alternately with the tabs of the second winding core.

7. The welding auxiliary tooling according to claim 5 or 6, characterized in that: The number of the air supply devices is four, two of the air supply devices are disposed on the upper surface of the first cover plate, and two of the air supply devices are disposed on the upper surface of the second cover plate.

8. The welding auxiliary tooling according to claim 1, characterized in that: The tabs of the first winding core and the second winding core are arranged above the adapter sheet of the battery cell top cover.

9. The welding auxiliary tooling according to claim 8, characterized in that: The middle part of the base is provided with a groove, and the battery cell top cover is arranged inside the groove.

10. The welding auxiliary tooling according to claim 1, characterized in that: The base is a square structure, and the four vertices of the base are provided with connection parts for fixing the welding auxiliary tooling during welding.

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