Device for detecting distance between tabs of wound battery cell

Abstract

The utility model discloses a winding cell tab spacing detection device, which relates to the technical field of lithium batteries and comprises a measuring frame, a scale plate is fixedly connected to the right side of the lower surface of the inner wall of the measuring frame, a fixed pressing block is fixedly connected to the rear side of the inner wall of the measuring frame, and an electrode plate is arranged at the bottom of the fixed pressing block. The front end of the electrode plate penetrates to the position below the front end of the measuring frame and is provided with a hanging weight, and the front side of the top of the measuring frame is slidably connected with a sliding pressing block. After one end of the electrode plate is fixed through the fixing pressing block, the rotating clamping plate can be clamped at the other end of the electrode plate by pressing the rotating clamping plate, and the other end of the electrode plate can be clamped through the rubber pad under the jacking of the jacking spring after the rotating clamping plate is loosened. And the other end of the electrode plate is straightened under the tension action of the balancing weight, and the electrode plate is flattened under the pressure action of the sliding pressing block, so that the measurement error is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and in particular to a device for detecting the distance between pole tabs of a wound battery cell. Background Art

[0002] At present, in the new energy industry, lithium-ion batteries are mainly divided into stacked batteries and wound batteries according to the electrode assembly method. Each wound battery is composed of two wound cells in parallel, and each winding core is composed of a positive electrode sheet, a negative electrode sheet and two diaphragms through winding. After the positive and negative electrode sheets are wound, all the positive electrode ears overlap together, and all the negative electrode ears also overlap together. The two sets of pole ears are distributed on both sides of the same end of the winding core. After the two winding cores are connected in parallel, they are connected to the cover plate through the adapter to form the positive and negative poles of the battery. The spacing between the pole ears of the wound battery cell is one of the most important factors affecting the alignment of the pole ears of the winding core. Therefore, before winding, the spacing between the pole ears of the winding core will be measured to ensure the alignment of the pole ears after winding. The alignment of the pole ears will affect the welding quality of the adapter, and at the same time will affect the overall overcurrent of the battery and affect the battery performance.

[0003] The existing technology has the following problems:

[0004] At present, the measurement of the distance between the tabs in the industry is all done manually, and the distance between the tabs is measured with a film ruler after the pole pieces are flattened manually. This method has a large human test error, such as the pole piece is not completely straightened or flattened, which will seriously affect the accuracy of the test results. Utility Model Content

[0005] The utility model provides a device for detecting the distance between pole tabs of a wound battery cell, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A device for detecting the spacing between the tabs of a wound battery cell comprises a measuring frame, a scale plate is fixedly connected to the right side of the lower surface of the inner wall of the measuring frame, a fixed pressure block is fixedly connected to the rear side of the inner wall of the measuring frame, an electrode sheet is arranged at the bottom of the fixed pressure block, the front end of the electrode sheet passes through to the bottom of the front end of the measuring frame and is provided with a hanging weight, and a sliding pressure block is slidably connected to the top front side of the measuring frame.

[0008] The hanging weight includes a connecting plate, which is arranged at the front end of the electrode sheet, and the front and rear sides of the connecting plate are movably hinged with rotating clamps, and the bottoms of the opposite surfaces of the two rotating clamps are fixedly connected with two tensioning springs, and the end of the tensioning spring away from the rotating clamp is fixedly connected to the bottom of the connecting plate, the top of the rotating clamp is fixedly connected with a rubber pad, and the middle part of the bottom end of the connecting plate is fixedly installed with a counterweight block.

[0009] A further improvement of the technical solution of the utility model is that the fixed pressure block includes a connecting column, the connecting column is fixedly connected to the rear side of the inner wall of the measuring frame, the top of the connecting column is movably connected with a knob 1, a movable groove is opened inside the connecting column, and the bottom end of the knob 1 penetrates into the inside of the movable groove and is fixedly connected with a bevel gear 1.

[0010] A further improvement of the technical solution of the utility model lies in that: the left and right sides of the outer surface of the bevel gear one are meshedly connected with the bevel gear two, the bevel gear two is movably connected inside the movable groove, the side of the bevel gear two away from the bevel gear one is fixedly connected with a transmission screw, the bottom end of the connecting column is provided with a sliding groove, the end of the transmission screw away from the bevel gear two penetrates into the interior of the sliding groove and the outer surface is threadedly connected with a threaded slider.

[0011] A further improvement of the technical solution of the utility model is that the two threaded sliders are respectively slidably connected to the left and right sides of the top of the sliding groove, the bottom end of the threaded slider is movably connected to a push rod, and the end of the two push rods away from the threaded slider is movably connected to a sliding pressure plate, and the sliding pressure plate is slidably connected to the bottom of the sliding groove.

[0012] A further improvement of the technical solution of the utility model is that the sliding pressure block includes a door-type sliding frame, both ends of the bottom of the door-type sliding frame are provided with a trapezoidal slide groove running through the front and back, both sides of the top of the measuring frame are fixedly connected with a trapezoidal slide rail, and the inner surface of the trapezoidal slide groove is slidably connected to the outer surface of the trapezoidal slide rail.

[0013] A further improvement of the technical solution of the utility model is that: a convex pressure plate is slidably connected to the inner side of the door-shaped sliding frame, and a second knob is movably connected to the top of the door-shaped sliding frame.

[0014] A further improvement of the technical solution of the utility model is that the bottom end of the second knob passes through the inner side of the door-shaped sliding frame and is fixedly connected with a threaded column, a threaded hole is opened in the center of the top in the vertical direction of the convex pressure plate, and the outer surface of the threaded column is threadedly connected with the inner surface of the threaded hole.

[0015] A further improvement of the technical solution of the utility model is that: the front and rear sides of the inner upper surface of the door-type sliding frame are fixedly connected with limiting sliding rods, the front and rear sides of the top in the vertical direction of the convex pressure plate are provided with limiting sliding grooves, and the outer surface of the limiting sliding rod is slidably connected with the inner surface of the limiting sliding groove.

[0016] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0017] 1. The utility model provides a device for detecting the spacing between the pole lugs of a wound battery cell. Through the cooperation among a measuring frame, a scale plate, a fixed pressure block, a connecting plate, a rotating clamp, a tightening spring, a rubber pad, and a counterweight block, after one end of an electrode sheet is fixed by a fixed pressure block, the rotating clamp can be clamped at the other end of the electrode sheet by pressing the rotating clamp. After the rotating clamp is released, the other end of the electrode sheet can be clamped by the rubber pad under the action of the tightening spring, so that the other end of the electrode sheet is straightened under the tensile force of the counterweight block, and the electrode sheet is flattened under the pressure of the sliding pressure block, thereby reducing the measurement error.

[0018] 2. The utility model provides a device for detecting the spacing between the pole ears of a wound battery cell. Through the mutual cooperation among a door-type sliding frame, a trapezoidal slide groove, a convex pressure plate, a threaded hole, a limiting slide groove, a second knob, a threaded column, and a limiting slide rod, by rotating the second knob, the threaded column and the threaded hole can cooperate with each other to drive the convex pressure plate to press on the electrode sheet. At the same time, the door-type sliding frame slides on the trapezoidal slide rail through the trapezoidal slide groove, so that the electrode sheet can be leveled, making the detection of the electrode sheet more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the fixed pressing block of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model for hanging heavy objects;

[0022] Figure 4 This is a schematic diagram of the structure of the sliding pressing block of the utility model;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the convex pressing plate of the utility model.

[0024] In the figure: 1. Measuring frame; 11. Scale plate; 12. Trapezoidal slide rail; 2. Fixed pressure block; 21. Connecting column; 22. Knob 1; 23. Bevel gear 1; 24. Bevel gear 2; 25. Transmission screw; 26. Threaded slider; 27. Push rod; 28. Sliding pressure plate; 3. Electrode sheet; 4. Hanging weight; 41. Connecting plate; 42. Rotating clamp; 43. Tightening spring; 44. Rubber pad; 45. Counterweight; 5. Sliding pressure block; 51. Door-type sliding frame; 52. Trapezoidal slide groove; 53. Convex pressure plate; 531. Threaded hole; 532. Limiting slide groove; 54. Knob 2; 55. Threaded column; 56. Limiting slide rod. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods:

[0026] like Figure 1-2 As shown, the utility model provides a device for detecting the spacing between the pole ears of a wound battery cell, comprising a measuring frame 1, a scale plate 11 is fixedly connected to the right side of the lower surface of the inner wall of the measuring frame 1, a fixed pressing block 2 is fixedly connected to the rear side of the inner wall of the measuring frame 1, an electrode sheet 3 is arranged at the bottom of the fixed pressing block 2, the front end of the electrode sheet 3 penetrates to the lower part of the front end of the measuring frame 1 and is provided with a hanging weight 4, a sliding pressing block 5 is slidably connected to the top front side of the measuring frame 1, the fixed pressing block 2 comprises a connecting column 21, the connecting column 21 is fixedly connected to the rear side of the inner wall of the measuring frame 1, a knob 22 is movably connected to the top of the connecting column 21, a movable groove is provided inside the connecting column 21, the bottom end of the knob 22 penetrates to the inside of the movable groove and is fixedly connected It is connected to a bevel gear 1 23, and the left and right sides of the outer surface of the bevel gear 1 23 are meshed with bevel gear 24, and the bevel gear 24 is movably connected inside the movable groove. The side of the bevel gear 24 away from the bevel gear 1 23 is fixedly connected with a transmission screw 25, and the bottom end of the connecting column 21 is provided with a sliding groove, and the end of the transmission screw 25 away from the bevel gear 24 penetrates into the inside of the sliding groove and is threadedly connected with a threaded slider 26 on the outer surface, and the two threaded sliders 26 are respectively slidably connected to the left and right sides of the top of the sliding groove, and the bottom end of the threaded slider 26 is movably connected with a push rod 27, and the ends of the two push rods 27 away from the threaded slider 26 are movably connected with a sliding pressure plate 28, and the sliding pressure plate 28 is slidably connected to the bottom of the sliding groove;

[0027] When the electrode sheet 3 is tested for the distance between the tabs, the electrode sheet 3 is placed on the measuring frame 1, and one end of the measuring frame 1 is placed at the bottom of the fixed pressure block 2. By rotating the knob 22, the bevel gear 23 can be driven to rotate, so that the transmission screw 25 can be driven to rotate through the bevel gear 24, and the threaded slider 26 can be driven to slide inside the sliding groove. Under the push of the push rod 27, the sliding pressure plate 28 can press and fix one end of the electrode sheet 3. Then, the other end of the electrode sheet will be straightened under the pulling force of the hanging weight 4, and the electrode sheet 3 will be flattened under the pressure of the sliding pressure block 5. By observing the scale plate 11, the distance between the tabs of the electrode sheet 3 can be obtained, thereby reducing the measurement error.

[0028] like Figure 3As shown, the utility model provides a winding battery cell tab spacing detection device, the hanging weight 4 includes a connecting plate 41, the connecting plate 41 is arranged at the front end of the electrode sheet 3, the front and rear sides of the connecting plate 41 are both movably hinged with a rotating clamping plate 42, the bottoms of the opposite surfaces of the two rotating clamping plates 42 are fixedly connected with two tensioning springs 43, the end of the tensioning spring 43 away from the rotating clamping plate 42 is fixedly connected to the bottom of the connecting plate 41, the top of the rotating clamping plate 42 is fixedly connected with a rubber pad 44, and a counterweight block 45 is fixedly installed in the middle of the bottom end of the connecting plate 41, and the counterweight block 45 is installed at the bottom of the connecting plate 41 by bolts;

[0029] When the electrode sheet 3 is tightened, the rotating clamp 42 can be clamped on the electrode sheet 3 by pressing the rotating clamp 42, and the rotating clamp 42 can be released. Under the push of the clamping spring 43, the electrode sheet 3 can be clamped and fixed by the rubber pad 44, and the electrode sheet 3 can be tightened under the gravity of the counterweight 45.

[0030] like Figure 4-5 As shown, the utility model provides a winding battery cell tab spacing detection device, the sliding pressure block 5 includes a door-shaped sliding frame 51, the bottom ends of the door-shaped sliding frame 51 are provided with a trapezoidal slide groove 52 that penetrates front and back, the top two sides of the measuring frame 1 are fixedly connected with a trapezoidal slide rail 12, the inner surface of the trapezoidal slide groove 52 is slidably connected with the outer surface of the trapezoidal slide rail 12, the inner side of the door-shaped sliding frame 51 is slidably connected with a convex pressure plate 53, the top of the door-shaped sliding frame 51 is movably connected with a knob 54, and the knob 55 is movably connected with the knob 56. The bottom end of the convex pressing plate 53 penetrates through the inner side of the door-shaped sliding frame 51 and is fixedly connected with a threaded column 55. A threaded hole 531 is provided at the center of the top in the vertical direction of the convex pressing plate 53. The outer surface of the threaded column 55 is threadedly connected with the inner surface of the threaded hole 531. The front and rear sides of the inner upper surface of the door-shaped sliding frame 51 are fixedly connected with a limiting sliding rod 56. The front and rear sides of the top in the vertical direction of the convex pressing plate 53 are provided with a limiting sliding groove 532. The outer surface of the limiting sliding rod 56 is slidably connected with the inner surface of the limiting sliding groove 532.

[0031] When leveling the electrode sheet 3, by rotating the knob 2 54, the threaded column 55 can cooperate with the threaded hole 531 to drive the convex pressure plate 53 to slide along the limiting slide rod 56, so that the convex pressure plate 53 can be pressed on the electrode sheet 3. At the same time, the door-type sliding frame 51 can slide on the trapezoidal slide rail 12 through the trapezoidal slide groove 52, so that the electrode sheet 3 can be leveled by the convex pressure plate 53, making the detection of the electrode sheet 3 more convenient.

[0032] The working principle of the winding battery cell tab spacing detection device is described in detail below.

[0033] like Figure 1-5As shown, when the electrode sheet 3 is tested for the distance between the tabs, the electrode sheet 3 is placed on the measuring frame 1, and one end of the measuring frame 1 is placed at the bottom of the fixed pressure block 2, and the bevel gear 23 can be driven to rotate by the knob 1 22, so that the transmission screw 25 can be driven to rotate by the bevel gear 24, and the threaded slider 26 can be driven to slide, so that the sliding pressure plate 28 can be pushed by the push rod 27 to press and fix one end of the electrode sheet 3, and then the other end of the electrode sheet 3 is clamped on the rotating clamping plate 42, and under the gravity of the counterweight 45, the electrode sheet 3 can be straightened, and by rotating the knob 2 54, the threaded column 55 can drive the convex pressure plate 53 to press on the electrode sheet 3, and at the same time, the electrode sheet 3 can be leveled by sliding the door-type sliding frame 51, and the spacing between the tabs of the electrode sheet 3 can be obtained by observing the scale plate 11.

[0034] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A device for detecting the distance between tabs of a wound battery cell, comprising a measuring frame (1), wherein a scale plate (11) is fixedly connected to the right side of the lower surface of the inner wall of the measuring frame (1), and characterized in that: A fixed pressure block (2) is fixedly connected to the rear side of the inner wall of the measuring frame (1); an electrode sheet (3) is arranged at the bottom of the fixed pressure block (2); the front end of the electrode sheet (3) penetrates to the lower part of the front end of the measuring frame (1) and is provided with a hanging weight (4); a sliding pressure block (5) is slidably connected to the front side of the top of the measuring frame (1); The hanging weight (4) includes a connecting plate (41), which is arranged at the front end of the electrode sheet (3), and the front and rear sides of the connecting plate (41) are both movably hinged with rotating clamps (42), and the bottoms of the opposite surfaces of the two rotating clamps (42) are fixedly connected with two tensioning springs (43), and one end of the tensioning spring (43) away from the rotating clamp (42) is fixedly connected to the bottom of the connecting plate (41), and the top of the rotating clamp (42) is fixedly connected with a rubber pad (44), and a counterweight block (45) is fixedly installed in the middle of the bottom end of the connecting plate (41).

2. A device for detecting the distance between tabs of a wound battery cell according to claim 1, characterized in that: The fixed pressure block (2) comprises a connecting column (21), wherein the connecting column (21) is fixedly connected to the rear side of the inner wall of the measuring frame (1), the top of the connecting column (21) is movably connected to a knob (22), a movable groove is provided inside the connecting column (21), and the bottom end of the knob (22) passes through the inside of the movable groove and is fixedly connected to a bevel gear (23).

3. A winding battery cell tab spacing detection device according to claim 2, characterized in that: The left and right sides of the outer surface of the bevel gear one (23) are meshedly connected with the bevel gear two (24), the bevel gear two (24) is movably connected inside the movable groove, the side of the bevel gear two (24) away from the bevel gear one (23) is fixedly connected with a transmission screw (25), the bottom end of the connecting column (21) is provided with a sliding groove, the end of the transmission screw (25) away from the bevel gear two (24) passes through the inside of the sliding groove and the outer surface is threadedly connected with a threaded slider (26).

4. A device for detecting the distance between tabs of a wound battery cell according to claim 3, characterized in that: The two threaded sliders (26) are respectively slidably connected to the left and right sides of the top of the sliding groove, and the bottom end of the threaded slider (26) is movably connected to a push rod (27). The ends of the two push rods (27) away from the threaded slider (26) are movably connected to a sliding pressure plate (28), and the sliding pressure plate (28) is slidably connected to the bottom of the sliding groove.

5. The device for detecting the distance between tabs of a wound battery cell according to claim 1, characterized in that: The sliding pressure block (5) comprises a door-shaped sliding frame (51), both ends of the bottom of the door-shaped sliding frame (51) are provided with a trapezoidal sliding groove (52) penetrating front and rear, both sides of the top of the measuring frame (1) are fixedly connected with a trapezoidal sliding rail (12), and the inner surface of the trapezoidal sliding groove (52) is slidably connected to the outer surface of the trapezoidal sliding rail (12).

6. A device for detecting the distance between tabs of a wound battery cell according to claim 5, characterized in that: A convex pressing plate (53) is slidably connected to the inner side of the door-shaped sliding frame (51), and a second knob (54) is movably connected to the top of the door-shaped sliding frame (51).

7. A device for detecting the distance between tabs of a wound battery cell according to claim 6, characterized in that: The bottom end of the second knob (54) passes through the inner side of the door-shaped sliding frame (51) and is fixedly connected with a threaded column (55); a threaded hole (531) is provided at the center of the top in the vertical direction of the convex pressure plate (53); the outer surface of the threaded column (55) is threadedly connected with the inner surface of the threaded hole (531).

8. The device for detecting the distance between tabs of a wound battery cell according to claim 6, characterized in that: The front and rear sides of the inner upper surface of the door-shaped sliding frame (51) are fixedly connected to the limiting sliding rod (56), and the front and rear sides of the top of the convex pressure plate (53) in the vertical direction are provided with limiting sliding grooves (532), and the outer surface of the limiting sliding rod (56) is slidably connected to the inner surface of the limiting sliding groove (532).

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