Welding jig and welding equipment

Abstract

The embodiment of the utility model provides a welding jig and welding equipment. The welding jig comprises a supporting unit, a first connecting rod, a second connecting rod, a first connecting rod and a second connecting rod, the size of the first connecting rod along the first direction is matched with the size of the battery piece along the first direction, so that the first connecting rod is erected above the battery piece; the first direction is a direction which forms an included angle of 80-100 degrees with the extending direction of the grid line of the battery piece; the limiting unit comprises a limiting piece, and the first end of the limiting piece is connected with the first connecting rod; the limiting piece is provided with a hollow part penetrating through the limiting piece in the second direction, and the included angle between the second direction and the first direction ranges from 85 degrees to 95 degrees. The hollow part extends to the second end of the limiting piece, so that an opening is formed in the second end, and the second end is opposite to the first end; the size of the opening in the first direction is matched with the width of the welding strip. According to the embodiment of the invention, the contact area between the molten solder strip and the grid line can be increased, so that the welding is firmer and the welding quality is improved.

Description

Technical Field

[0001] The present application relates to the technical fields of solar cell technology and cell welding technology, and particularly relates to a welding jig and a welding device. Background Art

[0002] When welding solar cells, the welding tape needs to be placed on the grid lines on the surface of the cell. The surface of the cell includes multiple grid lines, and multiple welding tapes need to be placed on the corresponding grid lines in sequence and kept flush with the grid lines. Without the assistance of a jig, the welding efficiency is greatly affected.

[0003] It should be noted that the above content is not necessarily prior art and does not limit the patent protection scope of the present application. Summary of the Utility Model

[0004] Embodiments of the present application provide a welding jig and a welding device to solve or alleviate one or more of the above technical problems.

[0005] In a first aspect of the embodiments of the present application, a welding jig is provided, including:

[0006] A support unit, the support unit includes a first connecting rod; the dimension of the first connecting rod along a first direction is adapted to the dimension of the cell along the first direction, so that the first connecting rod is erected above the cell; the first direction is a direction forming an angle of 80° - 100° with the extension direction of the grid lines of the cell;

[0007] A limiting unit, the limiting unit includes a limiting member, and a first end of the limiting member is connected to the first connecting rod; the limiting member has a hollow portion penetrating through the limiting member along a second direction, the second direction is a direction forming an angle of 85° - 95° with the first direction; the hollow portion extends to a second end of the limiting member to form an opening at the second end, the second end is an end opposite to the first end; the dimension of the opening along the first direction is adapted to the width of the welding tape.

[0008] In an embodiment, the limiting member includes opposite first inner sidewall and second inner sidewall; the first inner sidewall and / or the second inner sidewall include a free section, a guiding section and a clamping section sequentially distributed along the direction from the first end to the second end; the distance between the free section of the first inner sidewall and the second inner sidewall is greater than the distance between the clamping section of the first inner sidewall and the second inner sidewall; an opening is formed between the clamping section of the first inner sidewall and the second inner sidewall.

[0009] In an embodiment, the limiting member is provided with multiple hollow portions, and the multiple hollow portions are arranged corresponding to multiple grid lines on the cell.

[0010] In an embodiment, the limiting unit includes multiple limiting members, one limiting member is provided with one hollow portion, and the multiple limiting members are arranged corresponding to multiple grid lines on the cell.

[0011] In one embodiment, the limiting member includes a first limiting plate and a second limiting plate, which are oppositely arranged to form a hollow part between the first limiting plate and the second limiting plate.

[0012] In one embodiment, the first end of the limiting member is movably connected to the first connecting rod, and a plurality of position marking lines are provided on the first connecting rod to indicate the positions of a plurality of limiting members.

[0013] In one embodiment, the supporting unit further includes a first supporting rod and a second supporting rod which are oppositely arranged. Two ends of the first connecting rod are respectively fixedly connected to the first supporting rod and the second supporting rod. When the first supporting rod and the second supporting rod are arranged on the welding platform, the distance between the second end of the limiting member and the solar cell is 0-9 / 10 of the radial dimension of the welding tape.

[0014] In one embodiment, the number of the first connecting rods is at least two, and at least two first connecting rods are sequentially distributed along the second direction. The dimension of the first connecting rod and the limiting member along the second direction is 1-2 mm.

[0015] In one embodiment, the number of the first connecting rods is two, and the two first connecting rods are respectively arranged near the head end and the tail end of the grid line.

[0016] In one embodiment, the supporting unit further includes a second connecting rod, and two ends of the second connecting rod are respectively fixedly connected to the first supporting rod and the second supporting rod. The second connecting rod is arranged higher than the first connecting rod.

[0017] In a second aspect of the embodiments of the present application, a welding device is provided, including a welding head, a welding platform and a welding jig according to any one of the above embodiments. When the solar cell is placed on the welding platform, the welding jig is arranged on the welding platform so that the opening of the limiting member of the welding jig is aligned with the grid line of the solar cell.

[0018] By adopting the above technical solutions in the embodiments of the present application, when welding, the welding jig can be arranged above the solar cell, and the welding tape passes through the hollow part and falls into the opening, so that the welding tape is kept at the opening and above the grid line. When the opening is aligned with the grid line, it can be ensured that the welding tape falling at the opening is flush with the grid line. When the welding tape is flush with the grid line, welding is performed on the solar cell. The welding tape is directly above the grid line, and the contact area after melting with the grid line is maximized, making the welding more firm and improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals in multiple drawings denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0020] Figure 1 The schematic structural diagram of the welding jig provided by the embodiment of the present application is shown.

[0021] Figure 2 The schematic structural diagram of the cooperation between the welding jig and the welding tape during the welding process provided by the embodiment of the present application is shown. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] It should be noted that the terms "first", "second", etc. in the specification, claims and the above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented, for example, in an order different from those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0024] In this application, when it comes to numerical intervals (i.e., numerical ranges), unless otherwise specified, the distribution of the selectable numerical values within the numerical interval is regarded as continuous, and includes the two numerical endpoints (i.e., the minimum value and the maximum value) of the numerical interval, as well as each numerical value between these two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to the integers within the numerical interval, it includes the two endpoint integers of the numerical range, as well as each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all sub-ranges subsumed therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. The "numerical interval" is allowed to broadly include quantitative intervals such as percentage intervals, ratio intervals, ratio value intervals, etc.

[0025] Next, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. It should be noted that these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein.

[0026] An embodiment of the present application provides a welding jig. Figure 1 The structural schematic diagram of the welding jig provided by the embodiment of the present application is shown. Figure 2 The structural schematic diagram of the cooperation between the welding jig and the welding tape during the welding process provided by the embodiment of the present application is shown. As Figure 1 and Figure 2 shown, the welding jig 100 provided by the embodiment of the present application is used to play an auxiliary role in the welding of the battery cell 300, so as to keep the welding tape 200 above the grid line 310 of the battery cell 300, making the welding more firm.

[0027] It can be understood that in the absence of the assistance of the jig, when the welding tape 200 falls on the grid line 310, it may be that the welding tape is bent and difficult to be flush with the grid line 310, resulting in partial virtual welding; or it may be that the welding tape 200 falls on the side of the grid line 310, resulting in that after the welding tape 200 melts, it can only contact one side of the grid line 310, resulting in insecure contact and easy de-welding.

[0028] In view of this, an embodiment of the present application provides a welding jig 100 for assisting welding when welding the battery cell 300.

[0029] Welding the battery cell 300 can be to string-weld two battery cells 300 through the welding tape 200 to obtain a battery string. Then, the welding tape 200 needs to be aligned one-to-one with the grid lines 310 of the two battery cells 300.

[0030] The welding jig 100 provided by the embodiment of the present application includes a support unit and a limiting unit. The support unit includes a first connecting rod 111; the dimension of the first connecting rod 111 along the first direction is adapted to the dimension of the battery cell 300 along the first direction, so that the first connecting rod 111 is erected above the battery cell 300; the first direction is a direction forming an angle of 80°-100° with the extension direction of the grid line 310 of the battery cell 300.

[0031] The limiting unit includes a limiting member 120, and the first end of the limiting member 120 is connected to the first connecting rod 111; the limiting member 120 has a hollow portion 1201 penetrating through the limiting member 120 along the second direction, and the second direction is a direction forming an angle of 85°-95° with the first direction; the hollow portion 1201 extends to the second end of the limiting member 120 to form an opening 1202 at the second end, and the second end is the end opposite to the first end; the dimension of the opening 1202 along the first direction is adapted to the width of the welding tape 200.

[0032] In the embodiment of the present application, the limiting member 120 is hung on the first connecting rod 111, and the first connecting rod 111 is a connecting rod supported above the battery cell 300, so that the limiting member 120 is arranged above the battery cell 300. The welding tape 200 falling at the opening 1202 at the second end of the limiting member 120 is located above the battery cell 300, so that the welding tape 200 can contact the upper part of the grid line 310 instead of the side of the grid line 310.

[0033] The first direction is a direction forming an angle of 80°-100° with the extension direction of the grid line 310 of the battery cell 300, that is, the first direction is perpendicular or approximately perpendicular to the extension direction of the grid line 310.

[0034] In one example, the first direction is disposed perpendicular to the extension direction of the grid line 310, so that the radial direction of the opening 1202 of the limiting member 120 is flush with the grid line 310, thereby ensuring that the welding tape 200 is flush with the grid line 310.

[0035] In one example, the first direction is a direction forming an angle of 80° or 100° with the extension direction of the grid line 310 of the battery cell 300; that is, in the case where the first connecting rod 111 is inclined at a certain angle with respect to the direction perpendicular to the grid line 310, in this case, it is only necessary to ensure that the radial direction of the opening 1202 of the limiting member 120 is flush with the grid line 310, and it can also ensure that the welding tape 200 is flush with the grid line 310.

[0036] The dimension of the first connecting rod 111 along the first direction is adapted to the dimension of the battery cell 300 along the first direction, so that the first connecting rod 111 can straddle all the grid lines 310 of the battery cell 300, ensuring that the welding tapes 200 of multiple grid lines 310 of the battery cell 300 can be placed simultaneously.

[0037] The first end of the limiting member 120 can be fixedly connected to the first connecting rod 111 or can be movably connected.

[0038] In one example, when welding a large number of battery wafers 300 of the same type, that is, when the number of multiple grid lines 310 of the battery wafer 300 is the same and the spacing between adjacent grid lines 310 is also the same, it can be set that the first end of the limiting member 120 is fixedly connected to the first connecting rod 111. The spacing between multiple limiting members 120 is adapted to the spacing between multiple grid lines 310 on the battery wafer 300.

[0039] A hollow portion 1201 is provided in the limiting member 120, so that the welding tape 200 can pass through the hollow portion 1201 and fall to the opening 1202 to contact the grid line 310 on the battery wafer 300.

[0040] The second direction can be a direction parallel to the extension direction of the grid line 310 to ensure that when the welding tape 200 falls into the opening 1202, it is flush with the grid line 310.

[0041] The second direction can be the length direction of the grid line 310, and the first direction can be the width direction of the grid line 310 or the width direction of the welding tape 200. The dimension of the opening 1202 along the first direction is adapted to the width of the welding tape 200, so that the welding tape 200 can conveniently fall into the opening 1202, and the opening 1202 can play a role in limiting the welding tape 200.

[0042] In the embodiment of the present application, when welding the battery wafer 300, the welding jig 100 can be erected above the battery wafer 300, and the welding tape 200 passes through the hollow portion 1201 and falls into the opening 1202, so that the welding tape 200 is held at the opening 1202 and is located above the grid line 310; when the opening 1202 is aligned with the grid line 310, it can be ensured that the welding tape 200 falling at the opening 1202 is flush with the grid line 310. When the welding tape 200 is flush with the grid line 310, the battery wafer 300 is welded. The welding tape 200 is located directly above the grid line 310, and the contact area with the grid line 310 reaches the maximum after melting, making the welding more firm and improving the welding quality.

[0043] In one implementation, such as Figure 1 and Figure 2As shown, the limiting member 120 includes opposite first inner sidewall and second inner sidewall; the first inner sidewall and / or the second inner sidewall includes a free section 1211, a guiding section 1212, and a clamping section 1213 that are sequentially distributed along the direction from the first end to the second end; the distance between the free section 1211 of the first inner sidewall and the second inner sidewall is greater than the distance between the clamping section 1213 of the first inner sidewall and the second inner sidewall; an opening 1202 is formed between the clamping section 1213 of the first inner sidewall and the second inner sidewall.

[0044] The distance between the free section 1211 of the first inner sidewall and the second inner sidewall is greater than the distance between the clamping section 1213 of the first inner sidewall and the second inner sidewall, so that the guiding section 1212 of the first inner sidewall forms an inclined plane or an arc surface that is inclined and bent toward the clamping section 1213, so as to realize the guiding effect on the welding tape 200 and ensure that the welding tape 200 falls at the opening 1202.

[0045] The distance between the free section 1211 of the first inner sidewall and the second inner sidewall is large, so that the welding tape 200 can be conveniently inserted into the hollow part 1201, improving the welding efficiency.

[0046] In one example, both the first inner sidewall and the second inner sidewall are provided with a free section 1211, a guiding section 1212, and a clamping section 1213, which is convenient for the processing of the limiting member 120 and plays a double guiding role for the welding tape 200. In addition, the distance between the free section 1211 of the first inner sidewall and the second inner sidewall can be larger, making it more convenient for the welding tape 200 to be inserted into the hollow part 1201.

[0047] The height of the clamping section 1213 can be 0-1 / 2 of the radial dimension of the welding tape 200.

[0048] In one implementation, the limiting member 120 is provided with a plurality of hollow parts 1201, and the plurality of hollow parts 1201 are arranged corresponding to a plurality of grid lines 310 on the battery cell 300.

[0049] Since there are a plurality of grid lines 310 on the battery cell 300, by providing a plurality of hollow parts 1201 in one limiting member 120 and corresponding one hollow part 1201 to one grid line 310, it is possible to simultaneously place a plurality of welding tapes 200 corresponding to a plurality of grid lines 310 on the battery cell 300 and keep the welding tapes 200 above the grid lines 310, waiting for the welding head to melt the welding tapes 200.

[0050] In one implementation, the limiting unit includes a plurality of limiting members 120. One limiting member 120 is provided with one hollow part 1201, and the plurality of limiting members 120 are arranged corresponding to a plurality of grid lines 310 on the battery cell 300.

[0051] Similarly, since there are multiple grid lines 310 on the battery cell 300, by providing a plurality of limiting members 120 on a first connecting rod 111; one limiting member 120 has a hollow portion 1201, and multiple different solder tapes 200 respectively fall above different grid lines 310 from the hollow portions 1201 of different limiting members 120. The distance between the openings 1202 of adjacent limiting members 120 is adapted to the distance between the grid lines 310.

[0052] In one embodiment, as Figure 1 and Figure 2 shown, the limiting member 120 includes a first limiting plate 121 and a second limiting plate 122, and the first limiting plate 121 and the second limiting plate 122 are arranged opposite to each other to form a hollow portion 1201 between the first limiting plate 121 and the second limiting plate 122.

[0053] In the embodiment of the present application, the limiting member 120 is formed by the first limiting plate 121 and the second limiting plate 122, and a hollow portion 1201 is formed between the two limiting plates, which can facilitate the processing of the limiting member 120. In addition, the distance between the first limiting plate 121 and the second limiting plate 122 can be adjusted to make the welding jig 100 applicable to solder tapes 200 of different thicknesses, and the application scenarios of the welding jig 100 are improved.

[0054] In one embodiment, the first end of the limiting member 120 is movably connected to the first connecting rod 111, and a plurality of position marking lines are provided on the first connecting rod 111 to indicate the positions of the plurality of limiting members 120.

[0055] The first end of the limiting member 120 is movably connected to the first connecting rod 111, so that the position of the limiting member 120 can be adjusted according to the distance between the grid lines 310 of the battery cell 300, ensuring that the solder tape 200 can fall above the grid lines 310.

[0056] In one example, as Figure 1 and Figure 2 shown, the first ends of the first limiting plate 121 and the second limiting plate 122 of the limiting member 120 are both movably connected to the first connecting rod 111, so that the distance between the first limiting plate 121 and the second limiting plate 122 of the limiting member 120 can also be adjusted, so that the welding jig 100 can be used for welding solder tapes 200 of different thicknesses.

[0057] The plurality of position marking lines on the first connecting rod 111 can be scale lines engraved according to a preset standard; they can also be indication lines of the preset positions of the limiting members 120 engraved according to the distance between the grid lines 310 of the standard battery cell 300. A plurality of marking lines corresponding to multiple different standard battery cells 300 can be engraved on one first connecting rod 111, and marking values and type marks of the standard battery cells 300 can be provided at the marking lines.

[0058] In one embodiment, the support unit further includes a first support rod 113 and a second support rod 112 which are oppositely arranged. Two ends of the first connecting rod 111 are fixedly connected to the first support rod 113 and the second support rod 112 respectively. When the first support rod 113 and the second support rod 112 are arranged on the welding platform, the distance between the second end of the limiting member 120 and the battery cell 300 is 0-9 / 10 of the radial dimension of the welding tape 200.

[0059] The first support rod 113 and the second support rod 112 are used to support the first connecting rod 111, ensuring the stability of the welding jig 100 during the welding process, so as to ensure that the welding tape 200 is stably held above the grid line 310.

[0060] The distance between the second end of the limiting member 120 and the battery cell 300 is 0-9 / 10 of the radial dimension of the welding tape 200. The distance between the second end of the limiting member 120 and the battery cell 300 is close to 1 but not equal to 1. When this distance is equal to 1 or greater than 1, the welding tape 200 is likely to leave the opening 1202, making it difficult for the opening 1202 to limit the welding tape 200.

[0061] Preferably, the distance between the second end of the limiting member 120 and the battery cell 300 is 1 / 2-9 / 10 of the radial dimension of the welding tape 200, so that at least the lower half of the welding tape 200 is separated from the limiting member 120, facilitating the contact between the molten tin of the welding tape 200 and the grid line 310. In addition, it is also convenient for the welding tape 200 to act on the welding tape 200.

[0062] In one embodiment, the number of the first connecting rods 111 is at least 2, and at least 2 first connecting rods 111 are sequentially distributed along the second direction. The dimension of the first connecting rod 111 and the limiting member 120 along the second direction is 1-2 mm.

[0063] In the embodiment of the present application, the welding head can act on the welding tape 200 from above the limiting member 120. The dimension of the first connecting rod 111 and the limiting member 120 along the second direction is 1-2 mm, so that the limiting member 120, the first connecting rod 111, etc. will not affect the action of the welding head on the welding tape 200. The welding head can act on the welding tape 200 from the empty window between adjacent first connecting rods 111.

[0064] In one embodiment, the number of the first connecting rods 111 is 2, and the two first connecting rods 111 are respectively arranged close to the head end and the tail end of the grid line 310.

[0065] By arranging the first connecting rod 111 close to the head end or the tail end of the grid line 310, it is further ensured that the welding head will not be affected when acting on the welding tape 200, which provides convenience for welding and improves the welding efficiency.

[0066] In one embodiment, the support unit further includes a second link 114, and both ends of the second link 114 are fixedly connected to the first support rod 113 and the second support rod 112 respectively; the second link 114 is disposed higher than the first link 111.

[0067] The second link 114 is used to facilitate clamping of the support unit or the welding jig 100, so that when the battery cell 300 is placed on the welding platform, the welding jig 100 can be disposed above the battery cell 300 by clamping the second link 114, which is convenient for operation and improves the welding efficiency.

[0068] The embodiment of the present application further provides a welding device, including a welding head, a welding platform and the welding jig according to any one of the above embodiments; when the battery cell is placed on the welding platform, the welding jig is erected on the welding platform so that the opening of the limiting member of the welding jig is aligned with the grid lines of the battery cell.

[0069] The welding head can be a laser welding head or a heat source heating welding head. The welding head can be assisted by a manipulator to align the welding tape for heating so that the welding tape melts and solidifies.

[0070] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0071] For the sake of convenience of description, the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned "below other devices or structures" or "below other devices or structures" afterwards. Thus, the exemplary term "above..." can include both "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the relative spatial description used herein.

[0072] Unless otherwise clearly defined or limited, the terms "install", "connect", "couple", "fix", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of this application. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0074] Unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of this application. Also, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0075] It should also be noted that the "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures, or characteristics described in connection with that embodiment being included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure, or characteristic in connection with any embodiment, it is intended that the implementation of such feature, structure, or characteristic in connection with other embodiments also falls within the scope of this application.

[0076] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0077] It should also be noted that the above are only the preferred embodiments of the present application, and do not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. A welding jig, characterized in that: include: A support unit, the support unit comprising a first connecting rod; the size of the first connecting rod along the first direction is adapted to the size of the battery cell along the first direction, so that the first connecting rod is mounted above the battery cell; the first direction is a direction that forms an angle of 80°-100° with the extension direction of the grid line of the battery cell; A limiting unit, wherein the limiting unit comprises a limiting member, wherein the first end of the limiting member is connected to the first connecting rod; the limiting member has a hollow portion penetrating the limiting member along a second direction, wherein the second direction is a direction forming an angle of 85°-95° ​​with the first direction; the hollow portion extends to the second end of the limiting member to form an opening at the second end, wherein the second end is an end opposite to the first end; and the size of the opening along the first direction is adapted to the width of the welding strip.

2. The welding jig according to claim 1, characterized in that: The limiting member includes a first inner side wall and a second inner side wall that are opposite to each other; the first inner side wall and / or the second inner side wall include a free section, a guide section and a locking section that are sequentially distributed along the direction from the first end to the second end; the distance between the free section of the first inner side wall and the second inner side wall is greater than the distance between the locking section of the first inner side wall and the second inner side wall; the opening is formed between the locking section of the first inner side wall and the second inner side wall.

3. The welding jig according to claim 2, characterized in that: The position-limiting member is provided with a plurality of hollow parts, and the plurality of hollow parts are arranged corresponding to the plurality of grid lines on the battery sheet.

4. The welding jig according to claim 2, characterized in that: The limiting unit includes a plurality of limiting members, one of the limiting members is provided with one of the hollow parts, and the plurality of limiting members are arranged corresponding to the plurality of grid lines on the battery cell.

5. The welding jig according to claim 4, characterized in that: The limiting member includes a first limiting plate and a second limiting plate, and the first limiting plate and the second limiting plate are arranged opposite to each other to form the hollow portion between the first limiting plate and the second limiting plate.

6. The welding jig according to claim 4 or 5, characterized in that: The first end of the limiting member is movably connected to the first connecting rod, and a plurality of position marking lines are provided on the first connecting rod to indicate the positions of the plurality of limiting members.

7. The welding jig according to claim 1, characterized in that: The support unit also includes a first support rod and a second support rod arranged opposite to each other, and the two ends of the first connecting rod are fixedly connected to the first support rod and the second support rod respectively; when the first support rod and the second support rod are mounted on the welding platform, the distance between the second end of the limiter and the battery cell is 0-9 / 10 of the radial dimension of the welding strip.

8. The welding jig according to claim 7, characterized in that: The number of the first connecting rods is at least 2, and the at least 2 first connecting rods are distributed in sequence along the second direction; the dimensions of the first connecting rod and the limiting member along the second direction are 1-2 mm.

9. The welding jig according to claim 7, characterized in that: The number of the first connecting rods is two, and the two first connecting rods are respectively arranged close to the head end of the grid line and the tail end of the grid line.

10. The welding jig according to claim 7, characterized in that: The support unit further includes a second connecting rod, two ends of which are fixedly connected to the first supporting rod and the second supporting rod respectively; and the second connecting rod is arranged higher than the first connecting rod.

11. A welding device, characterized in that: It comprises a welding head, a welding platform and a welding jig as described in any one of claims 1 to 10; when a battery cell is placed on the welding platform, the welding jig is mounted on the welding platform so that the opening of the limiting part of the welding jig is aligned with the grid line of the battery cell.

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