Tension detection device and detection method

Abstract

The invention relates to the technical field of battery piece detection, in particular to a pulling force detection device and method, the pulling force detection device comprises a mounting main frame, a positioning assembly and a pulling force measuring piece, and the positioning assembly is movably arranged on the mounting main frame; the positioning assembly is used for positioning the film-coated battery piece, and the film-coated battery piece comprises a coating film and a battery piece which are arranged in a laminated manner; and the tension measuring piece is used for measuring tension data when the covering film is separated from the battery piece. The film-coated battery piece can be limited in the horizontal direction through the positioning assembly, accurate positioning of the film-coated battery piece is achieved, the accuracy of a detection result is improved, manual operation is not needed, the tension detection efficiency of the film-coated battery piece is improved, meanwhile, the tension test accuracy of the film-coated battery piece is greatly improved, and the detection efficiency of the film-coated battery piece is improved. And the test cost is also reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell detection, and in particular to a tension detection device and a detection method. Background Art

[0002] Film-coated cells are a type of cell that uses a new type of 0BB assembly process. The film covering the cell can protect the cell and enhance its durability. At the same time, the film-coated cell is thinner and lighter, and can be used in a more diverse environment. The production cost of film-coated cells is low and they have good weather resistance, and can adapt to high temperature, high humidity or strong light conditions. The performance of film-coated cells is related to the adhesion between the cell body and the film. The greater the adhesion, the tighter the adhesion, the better the performance. Therefore, it is necessary to use detection equipment to detect the adhesion between the film and the cell body. However, in the related art, the detection equipment is manually detected, which will cause the problem of inaccurate positioning of the film-coated cell, thereby affecting the accuracy of the detection results.

[0003] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Summary of the invention

[0004] The embodiment of the present application provides a tension detection device to solve or alleviate the problem that the above-mentioned detection equipment performs detection manually, which may cause inaccurate positioning of the film-coated battery cell.

[0005] As a first aspect of an embodiment of the present application, an embodiment of the present application provides a tension detection device, including: A main mounting frame, a positioning assembly and a tension measuring device are installed, wherein the positioning assembly is movably arranged on the main mounting frame; the positioning assembly is used to position the film-coated battery cell, and the film-coated battery cell includes a film and a battery cell arranged in a stacked manner; the tension measuring device is used to measure the tension data when the film and the battery cell are separated.

[0006] Optionally, the positioning assembly includes a first positioning portion and a second positioning portion both slidably disposed on the mounting main frame, the first positioning portion being used to limit the position of the film-covered battery sheet in a first direction, and the second positioning portion being used to limit the position of the film-covered battery sheet in a second direction.

[0007] Optionally, the main mounting frame includes a connecting body and a first mounting plate and a second mounting plate arranged opposite to each other; one end of the connecting body is connected to the first mounting plate, and the other end is connected to the second mounting plate; the first positioning portion and the second positioning portion are both slidably arranged on the connecting body.

[0008] Optionally, the first positioning portion includes a first driving member and a second driving member which are relatively and slidably arranged on the connecting body, and the film-covered battery sheet is placed between the first driving member and the second driving member; the first driving member is telescopically connected to a first top plate, and a first limiting block is vertically arranged on the first top plate; the second driving member is telescopically connected to a second top plate, and a second limiting block is vertically arranged on the second top plate; The first top plate and the second top plate are used to abut against the side surfaces of the battery cell, and the first limiting block and the second limiting block are used to support the battery cell.

[0009] Optionally, the second positioning portion includes a third driving member and a fourth driving member which are relatively and slidably arranged on the connecting body, and the film-covered battery sheet is placed between the third driving member and the fourth driving member; the third driving member is telescopically connected to a third top plate, and a third limit block is vertically arranged on the third top plate; the fourth driving member is telescopically connected to a fourth top plate, and a fourth limit block is vertically arranged on the fourth top plate; The third top plate and the fourth top plate are used to abut against the side surfaces of the battery cell, and the third limiting block and the fourth limiting block are used to support the battery cell.

[0010] Optionally, the connecting body includes a first connecting slide rail and a second connecting slide rail that are arranged oppositely and in parallel; one end of the first connecting slide rail is connected to the first mounting plate, and the other end is connected to the second mounting plate; one end of the second connecting slide rail is connected to the first mounting plate, and the other end is connected to the second mounting plate; The first driving member is slidably disposed on the first connecting slide rail, and the second driving member is slidably disposed on the second connecting slide rail; The first connecting slide rail and the second connecting slide rail are both provided with slide grooves on the opposite sides thereof; the third driving member is slidably arranged between the first connecting slide rail and the second connecting slide rail through the first connecting block and the slide groove; the fourth driving member is slidably arranged between the first connecting slide rail and the second connecting slide rail through the second connecting block and the slide groove.

[0011] Optionally, the tension detection device includes a tension component, which is arranged on the main mounting frame; the tension component includes a first tension part and a second tension part, the first tension part is used to apply a tension to the coating away from the battery cell, and the second tension part is used to apply a tension to the battery cell away from the coating; the tension measuring piece is used to measure the tension applied by the first tension part or the second tension part.

[0012] Optionally, the first tension part includes a first sliding plate, a first mounting block, a first air pump and a first vacuum suction cup; the first sliding plate is movably arranged in the mounting main frame; the first mounting block is arranged on the first sliding plate, the first air pump is arranged on the first mounting block, the first vacuum suction cup can be used to adsorb on the coating, and the first air pump is connected to the first vacuum suction cup through a first air pump column; the tension measuring piece is arranged between the first sliding plate and the first mounting block.

[0013] Optionally, the first mounting block includes a fixing plate and a fixing frame, an installation cavity is formed between the fixing frame and the fixing plate, the first vacuum pump is arranged in the installation cavity, and one end of the first vacuum column away from the first vacuum pump passes through the fixing frame and is connected to the first vacuum suction cup.

[0014] Optionally, the second pulling part includes a second sliding plate, a second air pump and a second vacuum suction cup; the second sliding plate is movably arranged in the main mounting frame; the second air pump is arranged on the second sliding plate, the second vacuum suction cup can be used to adsorb on the battery cell, and the second air pump is connected to the second vacuum suction cup through a second air pumping column.

[0015] Optionally, one side of the main mounting frame is provided with a first mounting rail and a second mounting rail which are opposite and parallel to each other, and the other side is provided with a third mounting rail and a fourth mounting rail which are opposite and parallel to each other; A first protective door is slidably provided between the first mounting slide rail and the second mounting slide rail; and a second protective door is slidably provided between the third mounting slide rail and the fourth mounting slide rail. As a second aspect of the embodiment of the present application, the embodiment of the present application provides a tension detection method, comprising the following steps: By driving the positioning assembly to move on the mounting main frame, the film-covered battery sheet is moved to a predetermined position; Adsorbing the film in the film-covered battery sheet by the first pulling part; Adsorbing the battery cell in the film-coated battery cell by the second pulling part; Applying a pulling force in a direction away from the battery cell to the covering film through a first pulling part, and applying a pulling force in a direction away from the covering film to the battery cell through a second pulling part, so as to peel off the battery cell and the covering film; The tension data of the first tension part during the process of peeling the covering film from the battery cell is recorded by a tension measuring device.

[0016] The above technical solution adopted in the embodiment of the present application may have the following advantages: During the tensile test of the film-coated battery cell, the film-coated battery cell is limited in the horizontal direction by the positioning assembly, thereby realizing the precise positioning of the film-coated battery cell and improving the accuracy of the test result; the tensile test device of the embodiment of the present application automatically performs the test according to the setting without manual operation, which improves the tensile test efficiency of the film-coated battery cell and greatly improves the accuracy of the tensile test of the film-coated battery cell, and also reduces the test cost. . BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts 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.

[0018] Figure 1 It is a structural schematic diagram of the tension detection device provided in an embodiment of the present application.

[0019] Figure 2 It is a schematic diagram of the partial structure of the tension detection device provided in an embodiment of the present application.

[0020] Figure 3 yes Figure 2 Enlarged view of part A.

[0021] Figure 4 It is a cross-sectional view of the front view of the tension detection device provided in an embodiment of the present application.

[0022] Figure 5 yes Figure 4 Magnified view of part B.

[0023] Figure 6 yes Figure 4 Magnified view of part C.

[0024] Figure 7 yes Figure 4 Enlarged view of part D.

[0025] Figure 8 It is a sectional view of a side view of the tension detection device provided in an embodiment of the present application.

[0026] Fig. 9 yes Figure 8 Enlarged view of part E.

[0027] Fig.10 yes Figure 8 Enlarged view of part F.

[0028] Description of reference numerals: 11. First mounting plate; 111. First sliding groove; 12. Second mounting plate; 121. Second sliding groove; 13. Connecting plate; 14. Connecting body; 141. First connecting rail; 1411. Slide groove; 142. Second connecting rail; 143. First slider; 144. Second slider; 145. First connecting block; 146. Second connecting block; 15. First mounting rail; 16. Second mounting rail; 17. Third mounting rail; 18. Fourth mounting rail; 19. First protective door; 20. Second protective door; 2. First driving member; 21. First top plate; 22. First stop block; 23. First guide column; 3. Second driving member; 31. Second top plate; 3 2. Second limit block; 33. Second guide column; 4. Third driving member; 41. Third top plate; 42. Third limit block; 43. Third guide column; 5. Fourth driving member; 51. Fourth top plate; 52. Fourth limit block; 53. Fourth guide column; 6. Tension measuring member; 7. First tension part; 71. First sliding plate; 721. Fixed plate; 722. Fixed frame; 723. Mounting cavity; 73. First vacuum pump; 74. First vacuum suction cup; 75. Second mounting block; 76. First vacuum column; 8. Second tension part; 81. Second sliding plate; 82. Second vacuum pump; 83. Second vacuum suction cup; 84. Second vacuum column; A1. First direction; A2. Second direction. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Hereinafter, 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 to the embodiments described herein.

[0032] like Figures 1 to 10 As shown, in the first aspect, the embodiment of the present application provides a tension detection device, which may include: a mounting main frame, a positioning component and a tension measuring piece 6, the positioning component is movably arranged on the mounting main frame; the positioning component is used to position the film-coated battery cell, and the film-coated battery cell includes a film and a battery cell arranged in a stacked manner; the tension measuring piece 6 is used to measure the tension data when the film and the battery cell are separated. In the embodiment of the present application, the tension measuring piece 6 may be a tension sensor. In this embodiment, during the tension detection of the film-coated battery cell, the horizontal direction of the film-coated battery cell is limited by the positioning component, thereby achieving precise positioning of the film-coated battery cell and improving the accuracy of the detection result; the tension detection device of the embodiment of the present application automatically detects according to the setting, without manual operation, which improves the efficiency of the tension detection of the film-coated battery cell, and also greatly improves the accuracy of the tension test of the film-coated battery cell, and also reduces the test cost.

[0033] In an optional embodiment, the positioning assembly includes a first positioning portion and a second positioning portion both slidably disposed on the mounting main frame, the first positioning portion being used to define the position of the film-coated battery cell in a first direction A1, and the second positioning portion being used to define the position of the film-coated battery cell in a second direction A2. The first direction A1 and the second direction A2 are perpendicular. The mounting main frame includes a connecting body 14 and a first mounting plate 11 and a second mounting plate 12 disposed opposite to each other; in an embodiment of the present application, the first mounting plate 11 and the second mounting plate 12 may be disposed parallel to each other. The first mounting plate 11 and the second mounting plate 12 may be rectangular plate-like structures, and the two ends of the first mounting plate 11 and the second mounting plate 12 are respectively connected by a connecting plate 13, so that the first mounting plate 11, the second mounting plate 12 and the two connecting plates 13 enclose a mounting main frame of a rectangular structure.

[0034] One end of the connecting body 14 is vertically connected to the first mounting plate 11 , and the other end is vertically connected to the second mounting plate 12 ; the first positioning portion and the second positioning portion are both slidably arranged on the connecting body 14 , and the sliding direction is perpendicular to the first mounting plate 11 and the second mounting plate 12 . In this embodiment, the first positioning portion is used to limit the position of the film-coated battery cell in the first direction A1, and the second positioning portion is used to limit the position of the film-coated battery cell in the second direction A2. The first positioning portion and the second positioning portion work together to achieve horizontal limitation of the film-coated battery cell, thereby improving the accuracy of positioning the film-coated battery cell, and further improving the accuracy of tension detection of the film-coated battery cell.

[0035] In an optional embodiment, the first positioning portion includes a first driving member 2 and a second driving member 3 that are relatively and slidably arranged on the connecting body 14, and the first driving member 2 and the second driving member 3 are used to place the film-coated battery cell; the first driving member 2 is telescopically connected to the first top plate 21, and the first limit block 22 is vertically arranged on the first top plate 21; the second driving member 3 is telescopically connected to the second top plate 31, and the second limit block 32 is vertically arranged on the second top plate 31; wherein the first top plate 21 and the second top plate 31 are used to abut against the side of the battery cell, and the first limit block 22 and the second limit block 32 are used to support the lower surface of the battery cell. In the embodiment of the present application, the first driving member 2 and the second driving member 3 can be cylinders. The first driving member 2 is connected to the first guide column 23 through a piston rod, and the first guide column 23 is fixedly connected to the first top plate 21. The second driving member 3 is connected to the second guide column 33 through a piston rod, and the second guide column 33 is fixedly connected to the second top plate 31.

[0036] In this embodiment, the first driving member 2 and the second driving member 3 slide to the set position on the connecting body 14, and then place the film-coated battery cell on the first limit block 22 and the second limit block 32. Then the first driving member 2 and the second driving member 3 drive the first top plate 21 and the second top plate 31 to move toward each other through the piston rod, and stably fix the film-coated battery cell between the first top plate 21 and the second top plate 31, thereby achieving the limitation of the film-coated battery cell in the x-axis direction, so that the film-coated battery cell can perform the subsequent tension detection step.

[0037] In an optional embodiment, the second positioning portion includes a third driving member 4 and a fourth driving member 5 which are relatively and slidably arranged on the connecting body 14, and the third driving member 4 and the fourth driving member 5 are used to place the film-coated battery cell; the third driving member 4 is telescopically connected to the third top plate 41, and the third limit block 42 is vertically arranged on the third top plate 41; the fourth driving member 5 is telescopically connected to the fourth top plate 51, and the fourth limit block 52 is vertically arranged on the fourth top plate 51; wherein the third top plate 41 and the fourth top plate 51 are used to abut against the side of the battery cell, and the third limit block 42 and the fourth limit block 52 are used to support the lower surface of the battery cell. In the embodiment of the present application, the third driving member 4 and the fourth driving member 5 can be cylinders. The third driving member 4 is connected to the third guide column 43 through a piston rod, and the third guide column 43 is fixedly connected to the third top plate 41. The fourth driving member 5 is connected to the fourth guide column 53 through a piston rod, and the fourth guide column 53 is fixedly connected to the fourth top plate 51.

[0038] In this embodiment, the third driving member 4 and the fourth driving member 5 place the film-coated battery cell on the third limit block 42 and the fourth limit block 52 after sliding to the set position on the connecting body 14, and then the third driving member 4 and the fourth driving member 5 drive the third top plate 41 and the fourth top plate 51 to move toward each other through the piston rod, so as to stably fix the film-coated battery cell between the third top plate 41 and the fourth top plate 51, thereby realizing the limitation of the film-coated battery cell in the y-axis direction, so that the film-coated battery cell can perform the subsequent tension detection step.

[0039] In an optional embodiment, the connecting body 14 includes a first connecting rail 141 and a second connecting rail 142 which are arranged opposite to and in parallel; one end of the first connecting rail 141 is vertically connected to the first mounting plate 11, and the other end is vertically connected to the second mounting plate 12; one end of the second connecting rail 142 is vertically connected to the first mounting plate 11, and the other end is vertically connected to the second mounting plate 12; the first driving member 2 is slidably set on the first connecting rail 141 through the first slider 143, and the second driving member 3 is slidably set on the second connecting rail 142 through the second slider 144; the first connecting rail 141 and the second connecting rail 142 are both provided with a slide groove 1411 on the opposite sides; the third driving member 4 is slidably set between the first connecting rail 141 and the second connecting rail 142 through the first connecting block 145 and the slide groove 1411; the fourth driving member 5 is slidably set between the first connecting rail 141 and the second connecting rail 142 through the second connecting block 146 and the slide groove 1411. In the embodiment of the present application, the first connecting rail 141 and the second connecting rail 142 are both driven by motors, and the sliding speed and position of the first slider 143, the second slider 144, the first connecting block 145 and the second connecting block 146 on the first connecting rail 141 and the second connecting rail 142 can be controlled by PLC. Through the control of PLC, the sliding accuracy of the first driving member 2, the second driving member 3, the third driving member 4 and the fourth driving member 5 on the first connecting rail 141 and the second connecting rail 142 can be improved, thereby improving the efficiency and accuracy of positioning the coated battery cells.

[0040] In an optional embodiment, the tension detection device includes a tension assembly, which is arranged on the main mounting frame; the tension assembly includes a first tension part 7 and a second tension part 8, which are slidably arranged between the first mounting plate 11 and the second mounting plate 12 along a direction parallel to the first mounting plate 11 and the second mounting plate 12. The first tension part 7 is used to apply a tension to the film away from the battery cell, and the second tension part 8 is used to apply a tension to the battery cell away from the film; the tension measuring member 6 is used to be electrically connected to the display device, and the tension measuring member 6 is used to measure the tension applied by the first tension part 7 or the second tension part 8. The first tensioning part 7 includes a first sliding plate 71, a first mounting block, a first air pump 73 and a first vacuum suction cup 74; one end of the first sliding plate 71 is slidably disposed on the first mounting plate 11, and the other end is slidably disposed on the second mounting plate 12; the first mounting block is disposed on the first sliding plate 71, the first air pump 73 is disposed on the first mounting block, the first vacuum suction cup 74 can be used to be adsorbed on the coating, and the first air pump 73 is connected to the first vacuum suction cup 74 through the first air pumping column 76; the tension measuring piece 6 is disposed between the first sliding plate 71 and the first mounting block. In the embodiment of the present application, the side of the first sliding plate 71 facing the first mounting block is also fixedly connected to the second mounting block 75, so that the tension measuring piece 6 is located between the first mounting block and the second mounting block 75. Along the direction parallel to the first mounting plate 11, a first sliding groove 111 is provided on the side of the first mounting plate 11 facing the second mounting plate 12; along the direction parallel to the second mounting plate 12, a second sliding groove 121 is provided on the side of the second mounting plate 12 facing the first mounting plate 11; one end of the first sliding plate 71 is slidably disposed in the first sliding groove 111, and the other end is slidably disposed in the second sliding groove 121. In addition, the first sliding plate 71 is driven by a motor in the first sliding groove 111 and the second sliding groove 121, and the sliding speed and position of the first sliding plate 71 in the first sliding groove 111 and the second sliding groove 121 are controlled by PLC.

[0041] In this embodiment, a motor drives the first sliding plate 71 to move downward between the first mounting plate 11 and the second mounting plate 12 until the first vacuum suction cup 74 is attached to the upper surface of the coating, and then the first vacuum pump 73 draws a vacuum inside the first vacuum suction cup 74 through the first vacuum column 76, so that the first vacuum suction cup 74 is tightly adsorbed on the coating, so that the first vacuum suction cup 74 can subsequently apply a pulling force to the coating away from the battery cell for a tensile test.

[0042] In an optional embodiment, the first mounting block includes a fixing plate 721 and a fixing frame 722, a mounting cavity 723 is formed between the fixing frame 722 and the fixing plate 721, the first air pump 73 is arranged in the mounting cavity 723, and the end of the first air pumping column 76 away from the first air pump 73 passes through the fixing frame 722 and communicates with the first vacuum suction cup 74. In the embodiment of the present application, the tension measuring member 6 is arranged between the fixing plate 721 and the second mounting plate 12. The first air pump 73 is arranged in the mounting cavity 723, which improves the stability of the installation of the first air pump 73.

[0043] In an optional embodiment, the second pulling part 8 includes a second sliding plate 81, a second air pump 82 and a second vacuum suction cup 83; one end of the second sliding plate 81 is slidably disposed on the first mounting plate 11, and the other end is slidably disposed on the second mounting plate 12; the second air pump 82 is disposed on the second sliding plate 81, and the second vacuum suction cup 83 can be used to adsorb on the side of the battery cell away from the coating, and the second air pump 82 is connected to the second vacuum suction cup 83 through the second air pumping column 84. In the embodiment of the present application, one end of the second sliding plate 81 is slidably disposed in the first sliding groove 111, and the other end is slidably disposed in the second sliding groove 121. In addition, the second sliding plate 81 is driven by a motor in the first sliding groove 111 and the second sliding groove 121, and the sliding speed and position of the second sliding plate 81 in the first sliding groove 111 and the second sliding groove 121 are controlled by PLC.

[0044] In this embodiment, the second sliding plate 81 is driven by a motor to slide in the direction close to the battery cell until the second vacuum suction cup 83 abuts against the battery cell, and then the second vacuum pump 82 vacuums the second vacuum suction cup 83 so that the second vacuum suction cup 83 and the battery cell are tightly adsorbed together; the first vacuum suction cup 74 applies a continuous upward adsorption force to the coating, and the second vacuum suction cup 83 applies a continuous downward adsorption force to the battery cell, and then the first sliding plate 71 slides in the direction away from the battery cell until the coating and the battery cell are completely separated. During this process, the tension measuring member 6 can continuously transmit the tension to the display device to obtain accurate test results. Therefore, when it is necessary to perform tension test on the coated battery cell, the positioning component is first used to position the coated battery cell, and then the first tension part 7 applies a tension away from the battery cell to the coating, and the second tension part 8 applies a tension away from the coating to the battery cell, which is used to simulate the real force environment of the coated battery cell, further improving the accuracy of the test results and ensuring the comprehensiveness of the test results.

[0045] In an optional embodiment, a relative and parallel first mounting rail 15 and a second mounting rail 16 are provided on one side of the main mounting frame, and a relative and parallel third mounting rail 17 and a fourth mounting rail 18 are provided on the other side; that is, a relative and parallel first mounting rail 15 and a second mounting rail 16 are provided on one side of the first mounting plate 11 and the second mounting plate 12, and a relative and parallel third mounting rail 17 and a fourth mounting rail 18 are provided on the other side; one end of the first mounting rail 15 is connected to the first mounting plate 11, and the other end is connected to the second mounting plate 12; one end of the second mounting rail 16 is connected to the first mounting plate 11, and the other end is connected to the second mounting plate 12, and a first protective door 19 is slidably provided between the first mounting rail 15 and the second mounting rail 16.

[0046] One end of the third mounting rail 17 is connected to the first mounting plate 11, and the other end is connected to the second mounting plate 12; one end of the fourth mounting rail 18 is connected to the first mounting plate 11, and the other end is connected to the second mounting plate 12; a second protective door 20 is slidably arranged between the third mounting rail 17 and the fourth mounting rail 18; wherein, the first mounting rail 15 and the second mounting rail 16 are located on the same side of the first mounting plate 11 and the second mounting plate 12, the third mounting rail 17 and the fourth mounting rail 18 are located on the same side of the first mounting plate 11 and the second mounting plate 12, and a second protective door 20 is slidably arranged between the third mounting rail 17 and the fourth mounting rail 18. In the embodiment of the present application, the first mounting rail 15, the second mounting rail 16, the third mounting rail 17 and the fourth mounting rail 18 are all motor-driven. The sliding speed and position of the first protective door 19 between the first mounting rail 15 and the second mounting rail 16 can be controlled by PLC, and the sliding speed and position of the second protective door 20 between the third mounting rail 17 and the fourth mounting rail 18 can also be controlled.

[0047] In this embodiment, it should be noted that if an accident occurs during the test, such as the film-coated battery cell accidentally detaching and popping out during separation, it may cause harm to the operator. In the embodiment of the present application, during the tensile test of the film-coated battery cell, the operator closes the film-coated battery cell between the first mounting plate 11 and the second mounting plate 12 through the first protective door 19 and the second protective door 20 until the film and the battery cell are completely separated, and then opens the first protective door 19 and the second protective door 20 after recording the test data, and takes out the film and the battery cell for processing, and resets the first sliding plate 71, the second sliding plate 81, the first driving member 2, the second driving member 3, the third driving member 4 and the fourth driving member 5. Therefore, the provision of the first protective door 19 and the second protective door 20 ensures the safety of the operator and greatly reduces the occurrence of accidental injuries.

[0048] In a second aspect, an embodiment of the present application further provides a tension detection method using the tension detection device of any of the above embodiments, comprising the following steps: Step 1: Place the film-covered battery cell on the first limit block 22, the second limit block 32, the third limit block 42 and the fourth limit block 52; Step 2: Then drive the first driving member 2, the second driving member 3, the third driving member 4 and the fourth driving member 5 to slide between the first connecting slide rail 141 and the second connecting slide rail 142 to move the film-covered battery sheet to a predetermined position; Step 3: Then start the first driving member 2, the second driving member 3, the third driving member 4 and the fourth driving member 5, respectively driving the first top plate 21, the second top plate 31, the third top plate 41 and the fourth top plate 51 to move towards the film-coated battery cell until they are tightly against the four sides of the battery cell, thereby limiting and fixing the film-coated battery cell; Step 4: The first sliding plate 71 drives the first vacuum pump 73 to move toward the direction close to the film until the first vacuum suction cup 74 abuts against the upper surface of the film, and then the first vacuum pump 73 draws vacuum, so that the first vacuum suction cup 74 is tightly adsorbed on the upper surface of the film; the second sliding plate 81 drives the second vacuum pump 82 to move toward the direction close to the battery cell, until the second vacuum suction cup 83 abuts against the lower surface of the battery cell, and then the second vacuum pump 82 draws vacuum, so that the second vacuum suction cup 83 is tightly adsorbed on the lower surface of the battery cell; Step 5: Close the first protection door 19 and the second protection door 20, and then slide the first sliding plate 71 in a direction away from the battery cell until the coating is completely peeled off from the battery cell. During the movement of the first sliding plate 71, the tension measuring member 6 continuously transmits the tension to the display device and records the tension data; Step 5: Open the first protective door 19 and the second protective door 20 again, take out the separated coating and battery cells for processing, and then reset the first sliding plate 71, the second sliding plate 81, the first driving member 2, the second driving member 3, the third driving member 4 and the fourth driving member 5.

[0049] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] For the convenience of description, the orientation or position relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" is usually based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Therefore, the exemplary term "above..." can include both "above..." and "below..." orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here are interpreted accordingly.

[0051] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; 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 specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0054] It should also be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment 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 a specific feature, structure or characteristic is described in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0055] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] It should also be noted that the above are only preferred embodiments of the present application, and the patent protection scope of the present application is not limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A tension detection device, characterized in that: include: A mounting main frame, a positioning component and a tension measuring piece (6), wherein the positioning component is movably arranged on the mounting main frame; the positioning component is used to position the film-coated battery cell, wherein the film-coated battery cell comprises a film and a battery cell that are stacked; and the tension measuring piece (6) is used to measure the tension data when the film and the battery cell are separated.

2. The tension detection device according to claim 1, characterized in that: The positioning assembly includes a first positioning portion and a second positioning portion both slidably disposed on the mounting main frame, the first positioning portion being used to limit the position of the film-covered battery sheet in a first direction (A1), and the second positioning portion being used to limit the position of the film-covered battery sheet in a second direction (A2).

3. The tension detection device according to claim 2, characterized in that: The mounting main frame comprises a connecting body (14) and a first mounting plate (11) and a second mounting plate (12) which are arranged opposite to each other; one end of the connecting body (14) is connected to the first mounting plate (11), and the other end is connected to the second mounting plate (12); the first positioning portion and the second positioning portion are both slidably arranged on the connecting body (14).

4. The tension detection device according to claim 3, characterized in that: The first positioning portion comprises a first driving member (2) and a second driving member (3) which are arranged on the connecting body (14) in a relative and slidable manner, and the film-covered battery sheet is placed between the first driving member (2) and the second driving member (3); the first driving member (2) is telescopically connected to a first top plate (21), and a first limiting block (22) is vertically arranged on the first top plate (21); the second driving member (3) is telescopically connected to a second top plate (31), and a second limiting block (32) is vertically arranged on the second top plate (31); The first top plate (21) and the second top plate (31) are used to abut against the side surfaces of the battery cell, and the first limiting block (22) and the second limiting block (32) are used to support the battery cell.

5. The tension detection device according to claim 4, characterized in that: The second positioning portion comprises a third driving member (4) and a fourth driving member (5) which are arranged on the connecting body (14) in a relative and slidable manner, and the film-covered battery sheet is placed between the third driving member (4) and the fourth driving member (5); the third driving member (4) is telescopically connected to a third top plate (41), and a third limiting block (42) is vertically arranged on the third top plate (41); the fourth driving member (5) is telescopically connected to a fourth top plate (51), and a fourth limiting block (52) is vertically arranged on the fourth top plate (51); The third top plate (41) and the fourth top plate (51) are used to abut against the side surfaces of the battery cell, and the third limiting block (42) and the fourth limiting block (52) are used to support the battery cell.

6. The tension detection device according to claim 5, characterized in that: The connecting body (14) comprises a first connecting slide rail (141) and a second connecting slide rail (142) which are arranged oppositely and in parallel; one end of the first connecting slide rail (141) is connected to the first mounting plate (11), and the other end is connected to the second mounting plate (12); one end of the second connecting slide rail (142) is connected to the first mounting plate (11), and the other end is connected to the second mounting plate (12); The first driving member (2) is slidably disposed on the first connecting slide rail (141), and the second driving member (3) is slidably disposed on the second connecting slide rail (142); The first connecting slide rail (141) and the second connecting slide rail (142) are provided with a slide groove (1411) on the opposite sides thereof; the third driving member (4) is slidably arranged between the first connecting slide rail (141) and the second connecting slide rail (142) through the first connecting block (145) and the slide groove (1411); the fourth driving member (5) is slidably arranged between the first connecting slide rail (141) and the second connecting slide rail (142) through the second connecting block (146) and the slide groove (1411).

7. The tension detection device according to claim 1, characterized in that: The tension detection device comprises a tension component, which is arranged on the main mounting frame; the tension component comprises a first tension part (7) and a second tension part (8), the first tension part (7) is used to apply a tension to the coating away from the battery cell, and the second tension part (8) is used to apply a tension to the battery cell away from the coating; the tension measuring piece (6) is used to measure the tension applied by the first tension part (7) or the second tension part (8).

8. The tension detection device according to claim 7, characterized in that: The first pulling part (7) comprises a first sliding plate (71), a first mounting block, a first air extractor (73) and a first vacuum suction cup (74); the first sliding plate (71) is movably arranged in the mounting main frame; The first mounting block is arranged on the first sliding plate (71), the first vacuum pump (73) is arranged on the first mounting block, the first vacuum suction cup (74) can be used to adsorb on the coating, and the first vacuum pump (73) is connected to the first vacuum suction cup (74) through a first vacuum column (76); the tension measuring piece (6) is arranged between the first sliding plate (71) and the first mounting block.

9. The tension detection device according to claim 7, characterized in that: The second pulling part (8) comprises a second sliding plate (81), a second vacuum pump (82) and a second vacuum suction cup (83); the second sliding plate (81) is movably arranged in the main mounting frame; the second vacuum pump (82) is arranged on the second sliding plate (81), the second vacuum suction cup (83) can be used to be adsorbed on the battery cell, and the second vacuum pump (82) is connected to the second vacuum suction cup (83) through a second vacuum column (84).

10. The tension detection device according to claim 1, characterized in that: One side of the main mounting frame is provided with a first mounting rail (15) and a second mounting rail (16) which are opposite and parallel to each other, and the other side is provided with a third mounting rail (17) and a fourth mounting rail (18) which are opposite and parallel to each other; A first protective door (19) is slidably arranged between the first mounting slide rail (15) and the second mounting slide rail (16); and a second protective door (20) is slidably arranged between the third mounting slide rail (17) and the fourth mounting slide rail (18).

11. A tension detection method using the tension detection device according to any one of claims 7 to 10, characterized in that: The steps include: By driving the positioning assembly to move on the mounting main frame, the film-coated battery sheet is moved to a predetermined position; Adsorbing the film in the film-covered battery sheet through the first pulling part (7); Adsorbing the battery cells in the film-coated battery cells by means of the second pulling portion (8); A first pulling force portion (7) is used to apply a pulling force to the covering film in a direction away from the battery cell, and a second pulling force portion (8) is used to apply a pulling force to the battery cell in a direction away from the covering film, so as to peel the battery cell and the covering film; The tension data of the first tension part (7) during the process of peeling the coating from the battery cell is recorded by a tension measuring device (6).

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