Battery piece testing tool, welding strip tension testing device and welding strip tension testing method

Abstract

The invention relates to the technical field of photovoltaic detection, and provides a battery piece testing tool, a welding strip tension testing device and a welding strip tension testing method. The battery piece testing tool comprises a fixing mechanism and a stripping mechanism, the fixing mechanism is used for fixing a film-coated main-grid-free battery piece, the film-coated main-grid-free battery piece comprises a substrate and an adhesive film which are arranged in a stacked mode, and a plurality of welding strips arranged at intervals are arranged between the substrate and the adhesive film; the stripping mechanism comprises a supporting part and a stripping part arranged on the supporting part, and the stripping part is used for being inserted between the substrate and the adhesive film so as to strip the adhesive film at the welding strip to be detected. According to the invention, the adhesive film at the position of the welding strip to be detected in the film-coated main-grid-free battery piece is stripped through the stripping mechanism, so that the detection of the tension of the welding strip in the film-coated main-grid-free battery piece is realized.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic detection technology, and in particular to a cell testing tool, a soldering ribbon tension testing device and a soldering ribbon tension testing method. Background Art

[0002] The tensile test of the soldering ribbon in photovoltaic cells is a key means to test the welding quality and reliability of photovoltaic cells, and plays a vital role in the photovoltaic industry.

[0003] In the traditional cell production process, the soldering ribbons are all welded to the cells by welding, and the soldering ribbons on the cells can be directly tested by a soldering ribbon tensile tester. However, for the film-coated busbarless series welding technology, a complete layer of adhesive film is covered on the cell substrate with the soldering ribbons, and after lamination and fixation, the adhesive film and the substrate are used to connect the soldering ribbons between the cells. Due to the structural differences between film-coated busbarless cells and traditional cells, it is impossible to use traditional soldering ribbon tensile test devices to accurately measure the soldering ribbon tension of film-coated busbarless cells. Summary of the invention

[0004] Based on this, the present application provides a cell testing tool, a soldering ribbon tension testing device and a soldering ribbon tension testing method that can assist in detecting the tension of soldering ribbons in film-coated busbar-less cell cells.

[0005] In a first aspect, the present application provides a battery cell testing tool, the battery cell testing tool comprising:

[0006] A fixing mechanism, the fixing mechanism is used to fix the film-covered busbar-free solar cell, the film-covered busbar-free solar cell comprises a laminated substrate and an adhesive film, a plurality of spaced-apart welding strips are arranged between the substrate and the adhesive film; and,

[0007] The peeling mechanism comprises a supporting portion and a peeling portion arranged on the supporting portion, and the peeling portion is used to be inserted between the substrate and the adhesive film to peel off the adhesive film at the welding strip to be tested.

[0008] In some embodiments, the peeling mechanism further includes an adjusting member, which is disposed on the supporting portion and connected to the peeling portion, and is used to adjust the relative distance between the peeling portion and the supporting portion to adjust the peeling distance between the adhesive film and the substrate.

[0009] In some embodiments, the adjusting member includes an elastic element, which is disposed between the supporting portion and the peeling portion, and the elastic element is used to adjust the distance between the supporting portion and the peeling portion through rebound and compression.

[0010] In some embodiments, the adjusting member further includes a rotating shaft, which is disposed on the supporting portion and abuts against the stripping portion. The rotating shaft is used to support the stripping portion and cooperate with the elastic element to make the stripping portion swing around the rotating shaft.

[0011] In some embodiments, a first engaging element is disposed on the supporting portion, and a second engaging element is disposed on the stripping portion, and the first engaging element is used to cooperate with the second engaging element to fix the swinging position of the stripping portion around the rotating shaft.

[0012] In some embodiments, a slot is formed on the support portion, and the slot is used to hold the base.

[0013] In some embodiments, the fixing mechanism includes a first clamp, and the first clamp is used to clamp and fix the adhesive film and the substrate.

[0014] In some embodiments, the fixing mechanism further includes a second clamp, and the second clamp is used to clamp and fix the adhesive film between the welding strip to be tested and an adjacent welding strip.

[0015] In a second aspect, the present application provides a welding ribbon tension test device, the welding ribbon tension test device comprising the battery cell test tooling as described in the first aspect, and further comprising:

[0016] A test bench, the test bench is used to place the battery cell test tool; and

[0017] A testing mechanism, the testing mechanism comprising a tensile gauge arranged on the testing table, the tensile gauge being connected to the welding strip to be tested in the battery cell testing tooling, and being used for testing the tensile force of the welding strip to be tested.

[0018] In some embodiments, the testing mechanism further includes a connector disposed between the tensile gauge and the welding strip to be tested, wherein the connector is used to connect the tensile gauge and the welding strip to be tested.

[0019] In some embodiments, the testing mechanism further includes a guide rail disposed on the testing table, and the dynamometer is slidably disposed on the guide rail.

[0020] In a third aspect, the present application provides a welding strip tension test method, the welding strip tension test method comprising:

[0021] Provided is a film-covered busbar-free solar cell, the busbar-free solar cell comprising a laminated substrate and an adhesive film, wherein a plurality of spaced-apart welding strips are arranged between the substrate and the adhesive film;

[0022] And, after peeling off the adhesive film and the substrate located at the solder strip to be tested in the film-covered busbar-free solar cell, a tensile test is performed on the solder strip to be tested.

[0023] Compared with the traditional technology, this application has at least the following beneficial effects:

[0024] The present application uses a fixing mechanism to fix the film-coated busbar-free cell, and then uses a peeling mechanism to peel off the adhesive film at the soldering strip to be tested from the substrate. The present application's cell test fixture can peel off the adhesive film at the soldering strip to be tested of the film-coated busbar-free cell, eliminating the adhesion of the adhesive film to the soldering strip, preventing the adhesive film from affecting the tensile force result of the soldering strip during the test, and realizing the soldering strip tensile test of the film-coated busbar-free cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a welding ribbon tension detection device including a battery cell testing tool provided in one embodiment of the present application;

[0026] Figure 2 A schematic diagram of a cross section of a battery cell in a peeled state of a battery cell testing tool provided in one embodiment of the present application;

[0027] Figure 3 A schematic diagram of the AA section of a battery cell testing tool provided in one embodiment of the present application before peeling;

[0028] Figure 4 A schematic diagram of the state of the AA section of a battery cell testing tool after peeling provided in one embodiment of the present application.

[0029] Among them, 100-coated main-gridless battery cell; 110-substrate; 120-adhesive film; 130-solder strip; 131-first solder strip to be tested; 132-second solder strip to be tested; 200-fixing mechanism; 210-second clamp; 300-peeling mechanism; 310-peeling part; 320-support part; 330-elastic element; 340-rotating shaft; 350-second locking element; 400-testing mechanism; 410-tensile gauge; 420-connector; 430-guide rail. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings, embodiments and examples. These embodiments and examples are only used to illustrate the present application and are not used to limit the scope of the present application. The purpose of providing these embodiments and examples is to make the understanding of the disclosure of the present application more thorough and comprehensive. It should also be understood that the present application can be implemented in many different forms, and is not limited to the embodiments and examples described herein. Those skilled in the art can make various changes or modifications without violating the connotation of the present application, and the equivalent form obtained also falls within the protection scope of the present application. In addition, in the description below, a large number of specific details are given in order to provide a more comprehensive understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.

[0031] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In this application, "optionally", "optional", and "optional" mean optional or dispensable, that is, any one of the two parallel schemes of "yes" or "no". If multiple "options" appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent.

[0034] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0035] The terms "first", "second", etc. in this application are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0036] All documents mentioned in this application are cited as references in this application, just as each document is cited as reference separately. Unless they conflict with the application purpose and / or technical solution of this application, the cited documents involved in this application are cited with all contents and all purposes. When the cited documents are involved in this application, the definitions of relevant technical features, terms, nouns, phrases, etc. in the cited documents are also cited. When the cited documents are involved in this application, the examples and preferred methods of the cited relevant technical features can also be incorporated into this application as references, but are limited to the implementation of this application. It should be understood that when the cited content conflicts with the description in this application, the present application shall prevail or be modified adaptively according to the description of this application.

[0037] In traditional technology, the welding ribbon is directly welded on the battery cell, and the welding tension of the welding ribbon can be tested by connecting the welding ribbon to the tension test device. However, for the film-coated busbar-free battery cell, the existence of the adhesive film will affect the accuracy of the welding ribbon tension test; and if the adhesive film is removed, the welding ribbon may fall off, making it impossible to test the welding ribbon tension.

[0038] Based on this, the first aspect of the present application provides a battery cell testing tool, such as Figure 1 and Figure 2 As shown, the battery cell testing tool includes a fixing mechanism 200 and a peeling mechanism 300 .

[0039] The fixing mechanism 200 is used to fix the film-covered busbar-free solar cell 100, which includes a laminated substrate 110 and an adhesive film 120, and a plurality of spaced solder strips 130 are disposed between the substrate 110 and the adhesive film 120. The stripping mechanism 300 includes a support portion 320 and a stripping portion 310 disposed on the support portion 320, and the stripping portion 310 is used to be inserted between the substrate 110 and the adhesive film 120 to strip the adhesive film 120 at the solder strip to be tested.

[0040] The present application uses a fixing mechanism 200 to fix the film-covered busbar-free cell 100, and then uses a peeling mechanism 300 to peel the adhesive film 120 at the soldering strip to be tested from the substrate 110. The cell test fixture of the present application can peel the adhesive film 120 at the soldering strip to be tested of the film-covered busbar-free cell 100, eliminate the adhesion of the adhesive film 120 to the soldering strip 130, prevent the adhesion of the adhesive film 120 during the test from affecting the tensile force result of the soldering strip 130, and realize the soldering strip tensile test of the film-covered busbar-free cell 100.

[0041] It is understandable that the length of the peeling portion 310 in the present application can be selected according to the length of the soldering ribbon 130 to ensure that there is no adhesion between the soldering ribbon 130 and the adhesive film 120 after peeling. Optionally, the length of the peeling portion 310 is greater than or equal to the length of the soldering ribbon 130.

[0042] It is understandable that the insertion position of the stripping portion 310 can be set on both sides of the solder strip to be tested, or can be set above the solder strip to be tested. It should be noted that the stripping portion 310 should be prevented from affecting the solder strip to be tested during the stripping process. In addition, in the present application, when the adhesive film at the position of the solder strip to be tested is stripped, the adhesive film at the other solder strip positions will not be stripped.

[0043] In some embodiments, the stripping mechanism 300 further includes an adjusting member (not shown in the figure), which is arranged on the support portion 320 and connected to the stripping portion 310, and the adjusting member is used to adjust the relative distance between the stripping portion 310 and the support portion 320, so as to adjust the stripping distance between the adhesive film 120 and the substrate 110. It is understood that the adjusting member in the present application can achieve the adjustment of the relative distance between the stripping portion 310 and the support portion 320. For example, it can be a lifter arranged between the stripping portion 310 and the support portion 320, and the lifter is used to adjust the relative distance between the stripping portion 310 and the support portion 320. When stripping, the stripping portion 310 is aligned between the adhesive film 120 and the substrate 110 for easy stripping. When the stripping portion 310 is inserted between the adhesive film 120 and the substrate 110, the relative distance between the stripping portion 310 and the support portion 320 can be adjusted, and the adhesive film 120 is stripped and stretched to cancel the adhesion between the adhesive film 120 and the welding strip to be tested.

[0044] Optionally, after being peeled by the peeling mechanism 300, the distance between the adhesive film 120 and the substrate 110 is greater than the thickness of the soldering strip 130, which not only ensures that the adhesive film 120 at the soldering strip to be tested is peeled off, but also avoids the problem of adhesion between the adhesive film 120 and the soldering strip 130. It is understandable that if the distance between the adhesive film 120 and the substrate 110 is too large, the adhesive film 120 of the adjacent soldering strip 130 may be peeled off, which may affect the accuracy of the tensile test of the adjacent soldering strips.

[0045] In some embodiments, Figure 3 and Figure 4 As shown, the adjusting member includes an elastic element 330, which is disposed between the supporting portion 320 and the peeling portion 310, and is used to adjust the distance between the supporting portion 320 and the peeling portion 310 by rebounding and compressing. Optionally, the elastic element 330 may be a spring, etc., and the distance between the adhesive film 120 and the substrate 110 may be adjusted by the rebound and compression of the spring. For example, when the peeling portion 310 is inserted between the substrate 110 and the adhesive film 120, the peeling portion 310 may be pressed to compress the elastic element 330 to reduce the relative distance between the peeling portion 310 and the supporting portion 320, and then the peeling portion 310 may be released during the peeling process, and the rebound of the elastic element 330 increases the relative distance between the peeling portion 310 and the supporting portion 320, thereby improving the peeling of the adhesive film 120 and the substrate 110.

[0046] In some embodiments, Figure 3 and Figure 4 As shown, the adjusting member further includes a rotating shaft 340, which is disposed on the supporting portion 320 and abuts against the stripping portion 310. The rotating shaft 340 is used to support the stripping portion 310 and cooperate with the elastic element 330 to make the stripping portion 310 swing around the rotating shaft 340. The present application adds the rotating shaft 340, and by pressing the stripping portion 310, the stripping portion 310 can swing around the rotating shaft 340 under the action of the elastic element 330, so as to adjust the relative distance between the stripping portion 310 and the supporting portion 320. For example, the distance between the insertion side of the stripping portion 310 and the supporting portion 320 can be reduced by swinging, so as to facilitate the insertion of the stripping portion 310; after the stripping portion 310 is inserted, the distance between the insertion side of the stripping portion 310 and the supporting portion 320 can be increased by swinging, so as to further open the adhesive film 120 and the substrate 110. Furthermore, the stripping portion 310 is supported by the rotating shaft 340 so that the stripping portion 310 and the supporting portion 320 are level, thereby ensuring the uniformity of stripping along the length direction of the solder strip to be tested and improving the adjustment stability of the elastic element 330 .

[0047] Optionally, the elastic element 330 can be arranged on the side of the rotating shaft 340 close to the insertion side of the stripping part 310, or can be arranged on the side of the rotating shaft 340 far from the insertion side of the stripping part 310. For example, when the elastic element 330 is arranged on the side of the rotating shaft 340 close to the insertion side of the stripping part 310, the elastic element 330 compresses and reduces the distance between the stripping part 310 located on the insertion side and the support part 320, so as to facilitate the insertion of the stripping part 310 between the adhesive film 120 and the substrate 110; after the stripping part 310 is inserted, the elastic element 330 stretches and increases the distance between the stripping part 310 located on the insertion side and the support part 320, so as to spread the adhesive film 120 and the substrate 110 apart, wherein the stripping part 310 far from the insertion side can be adjusted by pressing or lifting, and the relative distance between the stripping part 310 and the support part 320 can be adjusted by the swinging of the stripping part 310 around the rotating shaft 340, thereby realizing the adjustment of the stripping distance between the substrate 110 and the adhesive film 120.

[0048] In some embodiments, a first engaging element is provided on the support portion 320, and a second engaging element 350 is provided on the stripping portion 310. The first engaging element is used to cooperate with the second engaging element 350 to fix the swing position of the stripping portion 310 around the rotating shaft 340. The present application utilizes the cooperation of the first engaging element and the second engaging element 350 to lock the stripping portion 310, so that the relative distance between the stripping portion 310 and the support portion 320 remains unchanged, thereby ensuring the stripping stability.

[0049] Optionally, the first engaging element may be a buckle provided on the support portion 320, and the second engaging element may be a slot provided on the stripping portion 310. Alternatively, the first engaging element may be a slot provided on the support portion 320, and the second engaging element 350 may be a buckle provided on the stripping portion 310. Further, a plurality of first engaging elements may be provided on the support portion 320, so that the second engaging element 350 may be engaged with different first engaging elements to achieve different stripping adjustment effects.

[0050] In some embodiments, Figure 3 As shown, a slot is provided on the support portion 320, and the slot is used to clamp the substrate 110. Optionally, the depth of the slot is less than or equal to the length of the welding strip 130. The present application uses the slot to clamp the substrate 110, thereby further improving the stability of the substrate 110 during the peeling and testing process.

[0051] It is understandable that the fixing mechanism 200 can fix the battery cell, for example, by using a clamp or a limiter.

[0052] In some embodiments, the fixing mechanism 200 includes a first clamp, and the first clamp is used to clamp and fix the adhesive film 120 and the substrate 110. The present application uses the first clamp to clamp and fix the battery cell, thereby fixing the adhesive film 120 and the substrate 110 in the battery cell, and preventing the adhesive film 120 and the substrate 110 from moving during the peeling and tensile test process, which affects the peeling stability and tensile test stability.

[0053] In some embodiments, Figure 2 As shown, the fixing mechanism 200 also includes a second clamp 210, and the second clamp 210 is used to clamp and fix the adhesive film 120 between the welding strip to be tested and the adjacent welding strip 130. Optionally, the position of the second clamp 210 and the position of the stripping portion 310 are staggered, that is, the stripping portion 310 is stripped on one side of the welding strip to be tested, and the second clamp 210 is fixed on the other side of the welding strip to be tested. The present application is provided to clamp and fix the adhesive film 120 next to the welding strip to be tested, so as to avoid the stripping portion 310 causing the adhesive film 120 on the adjacent welding strip 130 to be stripped during the stripping process, thereby affecting the accuracy of the adjacent welding strip 130 during the tensile test.

[0054] Exemplarily, a method for peeling off the adhesive film 120 at the welding strip to be tested of the film-covered busbar-free solar cell 100 using the above-mentioned solar cell testing tool is provided, comprising:

[0055] The film-covered busbar-less solar cell 100 is fixed by a fixing mechanism 200 .

[0056] The peeling portion 310 is inserted between the adhesive film 120 at the solder strip to be tested and the substrate 110 , and the adhesive film 120 at the solder strip to be tested is separated from the solder strip to be tested.

[0057] The second aspect of the present application provides a welding strip tension testing device, such as Figure 1 As shown, the welding ribbon tension test device includes the battery cell test tooling as in the first aspect, and also includes:

[0058] Test bench: The test bench is used to place battery cell testing equipment.

[0059] The testing mechanism 400 includes a tensile gauge 410 disposed on a testing table. The tensile gauge 410 is connected to a solder strip to be tested in a battery cell testing tooling and is used to test the tensile force of the solder strip to be tested.

[0060] The present application fixes the coated busbar-free TV film by using a cell test fixture, and uses a peeling mechanism 300 to peel off the adhesive film 120 at the position of the welding strip to be tested, so as to prevent the adhesive film 120 from sticking and affecting the accuracy of the tensile test.

[0061] In some embodiments, the fixing mechanism 200 and the stripping mechanism 300 in the cell test fixture are detachably arranged on the test bench. The present application can replace the fixing mechanism 200 and the stripping mechanism 300 according to different film-coated busbar-free cells 100, thereby improving the applicability of the welding ribbon tension test device.

[0062] It is understandable that during the peeling process, the peeling mechanism 300 may be driven to insert the peeling portion 310 into the fixed battery cell for peeling; or the battery cell may be driven to move, and the peeling portion 310 may be fixed so that the peeling portion 310 is inserted for peeling. That is, the battery cell and the peeling mechanism 300 may be able to move relative to each other.

[0063] In some embodiments, a first slide rail is provided on the test bench along the length direction of the welding strip 130, and the fixing mechanism 200 or the peeling mechanism 300 is provided in the slide rail, so that during the peeling process, the fixing mechanism 200 or the peeling mechanism 300 can move along the slide rail to ensure that the peeling part 310 is inserted into the correct position and improve the peeling stability.

[0064] In some embodiments, a second slide rail is provided on the test bench along a length direction perpendicular to the solder strip 130, and the fixing mechanism 200 or the peeling mechanism 300 can be disposed in the slide rail, so that after the test of the solder strip to be tested is completed, the peeling portion 310 is taken out of the battery cell, and then the battery cell is moved along the second slide rail through the fixing mechanism 200, or the peeling mechanism 300 is directly moved along the second slide rail to peel off the next solder strip 130 in the battery cell and test the tensile force.

[0065] In some embodiments, the welding ribbon tensile testing device includes two stripping mechanisms 300, which are respectively arranged at opposite ends of the film-covered busbar-free solar cell 100. During the test, the welding ribbons 130 located at both ends of the film-covered busbar-free solar cell 100 can be tested sequentially to the welding ribbons 130 located in the middle part, thereby improving the test efficiency. Furthermore, the tensile test can be performed on multiple welding ribbons 130 in the film-covered busbar-free solar cell 100 at the same time.

[0066] In some embodiments, the testing mechanism 400 further includes a connector 420 disposed between the tensile gauge 410 and the welding strip to be tested, and the connector 420 is used to connect the tensile gauge 410 and the welding strip to be tested. Optionally, the connector 420 includes a fixing clamp, and the welding strip to be tested is clamped and fixed by the fixing clamp, and then the tensile gauge 410 is connected to the fixing clamp to test the tension of the welding strip 130, so as to avoid the problem of mismatch between the connection end of the tensile gauge 410 and the welding strip 130.

[0067] In some embodiments, the testing mechanism 400 further includes a guide rail 430 disposed on the test bench, and the dynamometer 410 is slidably disposed on the guide rail 430. The present application sets the dynamometer 410 on the guide rail 430 to ensure the stability of the movement of the dynamometer 410 during the test process, and to prevent changes in the tension force from affecting the accuracy of the tension test. In addition, a scale mark can be set on the guide rail 430 to facilitate observation of the reset position and the end position of the dynamometer 410.

[0068] A third aspect of the present application provides a welding strip tension test method, the welding strip tension test method comprising:

[0069] A film-covered busbar-less solar cell 100 is provided. The busbar-less solar cell comprises a substrate 110 and an adhesive film 120 which are stacked, and a plurality of welding strips 130 which are arranged at intervals are arranged between the substrate 110 and the adhesive film 120 .

[0070] After peeling off the adhesive film 120 and the substrate 110 located at the solder strip to be tested in the film-covered busbar-less solar cell 100, a tensile test is performed on the solder strip to be tested.

[0071] Exemplarily, a method for performing a tensile test on a soldering ribbon 130 in a film-covered busbar-free solar cell 100 using the soldering ribbon tensile test device is provided, comprising the following steps:

[0072] S1. Fix the battery cell.

[0073] The battery cell is placed on the test bench, wherein the battery cell includes a first welding strip to be tested 131 and a second welding strip to be tested 132 arranged in sequence from the edge to the middle, and is fixed by a first clamp and a second clamp 210, wherein the first clamp can be clamped at any position on the battery cell to ensure the stability of the substrate 110 and the adhesive film 120 of the battery cell during the peeling and tensile test; the second clamp 210 is clamped between the welding strip to be tested and the adjacent welding strip 130 to avoid the adhesive film 120 of the adjacent welding strip 130 being peeled off when the adhesive film 120 is peeled off from the welding strip to be tested. For example, when performing a tensile test on the first welding strip to be tested 131 near the edge of the battery cell, the first clamp can be clamped in the middle area of ​​the battery cell, and the second clamp 210 can be clamped in the area between the first welding strip to be tested 131 and the second welding strip to be tested 132.

[0074] S2, peeling off the adhesive film 120.

[0075] The insertion side of the stripping part 310 is adjusted by the elastic element 330 and the rotating shaft 340 so that the insertion side of the stripping part 310 can be easily inserted between the adhesive film 120 and the substrate 110. After the stripping part 310 is inserted, it is adjusted again and the stripping part 310 is completely inserted between the adhesive film 120 and the substrate 110. The adhesive film 120 at the position of the welding strip to be measured is placed in the glass. The first locking element on the supporting part 320 and the second locking element 350 on the stripping part 310 can be used to lock the relative distance between the stripping part 310 and the supporting part 320 to maintain the stripping stability.

[0076] S3. Tensile test.

[0077] The tensile gauge 410 is connected to the welding strip to be tested in step S2 by using the connecting piece 420. The tensile gauge 410 and the welding strip 130 are in the same straight line and the tensile test is performed along the guide rail 430. The test is repeated more than three times to obtain the average tensile force of the welding strip to be tested.

[0078] It is understandable that after testing one solder strip to be tested, the connection between the tensile gauge 410 and the solder strip to be tested is disconnected, and the stripping portion 310 is removed from the battery cell, and the tensile test is continued on the next solder strip to be tested.

[0079] In summary, the present application uses a fixing mechanism 200 to fix the film-coated busbar-free solar cell 100, and then uses a peeling mechanism 300 to peel off the adhesive film 120 at the soldering strip to be tested from the substrate 110. The solar cell testing tool of the present application can peel off the adhesive film 120 at the soldering strip to be tested of the film-coated busbar-free solar cell 100, eliminate the adhesion of the adhesive film 120 to the soldering strip 130, prevent the adhesion of the adhesive film 120 during the test from affecting the tensile force result of the soldering strip 130, and realize the soldering strip tensile test of the film-coated busbar-free solar cell 100.

[0080] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery cell testing tool, characterized in that: The battery cell testing tool comprises: A fixing mechanism (200), the fixing mechanism (200) being used to fix a film-covered busbar-free solar cell (100), the film-covered busbar-free solar cell (100) comprising a substrate (110) and an adhesive film (120) which are stacked, a plurality of welding strips (130) arranged at intervals being arranged between the substrate (110) and the adhesive film (120); and, A stripping mechanism (300) comprising a support portion (320) and a stripping portion (310) disposed on the support portion (320), the stripping portion (310) being used to be inserted between the substrate (110) and the adhesive film (120) to strip the adhesive film (120) at the solder strip to be tested.

2. The battery cell testing tool as claimed in claim 1, characterized in that: The peeling mechanism (300) further comprises an adjusting member, which is arranged on the supporting portion (320) and connected to the peeling portion (310), and is used to adjust the relative distance between the peeling portion (310) and the supporting portion (320) so as to adjust the peeling distance between the adhesive film (120) and the substrate (110).

3. The battery cell testing tool as claimed in claim 2, characterized in that: The adjusting member comprises an elastic element (330), wherein the elastic element (330) is arranged between the supporting portion (320) and the peeling portion (310), and the elastic element (330) is used to adjust the distance between the supporting portion (320) and the peeling portion (310) through rebound and compression.

4. The battery cell testing tool as claimed in claim 3, characterized in that: The adjusting member further comprises a rotating shaft (340), wherein the rotating shaft (340) is arranged on the supporting portion (320) and abuts against the peeling portion (310), and the rotating shaft (340) is used to support the peeling portion (310) and cooperate with the elastic element (330) to enable the peeling portion (310) to swing around the rotating shaft (340).

5. The battery cell testing tool as claimed in claim 4, characterized in that: The support portion (320) is provided with a first engaging element, and the stripping portion (310) is provided with a second engaging element (350), wherein the first engaging element is used to cooperate with the second engaging element (350) to fix the swinging position of the stripping portion (310) around the rotating shaft (340).

6. The battery cell testing tool as claimed in any one of claims 1 to 5, characterized in that: The support portion (320) is provided with a slot, and the slot is used to clamp the base (110).

7. The battery cell testing tool as claimed in any one of claims 1 to 5, characterized in that: The fixing mechanism (200) comprises a first clamp, the first clamp being used to clamp and fix the adhesive film (120) and the substrate (110); and / or, The fixing mechanism (200) further comprises a second clamp (210), wherein the second clamp (210) is used to clamp and fix the adhesive film (120) between the welding strip to be tested and an adjacent welding strip (130).

8. A welding strip tensile test device, characterized in that: The welding ribbon tension testing device comprises the battery cell testing tool as claimed in any one of claims 1 to 7, and further comprises: A test bench, the test bench is used to place the battery cell test tool; and A testing mechanism (400), the testing mechanism (400) comprising a tensile gauge (410) arranged on the testing table, the tensile gauge (410) being connected to the welding strip to be tested in the battery cell testing tooling, and being used to test the tensile force of the welding strip to be tested.

9. The welding strip tensile testing device according to claim 8, characterized in that: The testing mechanism (400) further comprises a connecting member (420) arranged between the tensile gauge (410) and the welding strip to be tested, the connecting member (420) being used to connect the tensile gauge (410) and the welding strip to be tested; and / or, The testing mechanism (400) further comprises a guide rail (430) arranged on the testing table, and the dynamometer (410) is slidably arranged on the guide rail (430).

10. A welding strip tensile test method, characterized in that: The welding strip tensile test method comprises: A film-coated busbar-free solar cell (100) is provided, the busbar-free solar cell comprising a substrate (110) and an adhesive film (120) which are stacked, and a plurality of welding strips (130) arranged at intervals are arranged between the substrate (110) and the adhesive film (120); And, after peeling off the adhesive film (120) and the substrate (110) located at the solder strip to be tested in the film-covered busbar-free solar cell (100), a tensile test is performed on the solder strip to be tested.

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