Battery cell multi-angular rotation detection jig and winding battery cell detection equipment

Abstract

The embodiment of the utility model provides a battery cell multi-angle rotation detection jig and a winding battery cell detection device, and relates to the field of lithium battery pole piece detection. The problems that the detection cost of the corners of the battery cell is high and the battery cell shifts in the clamping and rotating process can be solved. The battery cell multi-angle rotation detection jig comprises a main shaft, a clamp bottom plate, a battery cell supporting claw and a clamping claw assembly, wherein the clamp bottom plate is rotatably arranged around the main shaft; the battery cell supporting claw is used for limiting the position of a battery cell along a first direction; the clamping jaw assembly is used for clamping and fixing the battery cell along a second direction; and four exposure spaces are formed between the clamping jaw assembly and the battery cell supporting jaw along the circumferential direction of the main shaft and are used for exposing four corners of the battery cell along a third direction. The winding cell detection equipment comprises the jig. The jig is rotated to meet four-corner detection, and the detection efficiency is high; and meanwhile, the battery cell supporting claw and the clamping claw assembly are used for clamping and fixing the battery cell in two directions which are perpendicular to each other respectively, so that the battery cell is prevented from shifting in the rotating process.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery pole piece detection, and in particular to a multi-angle rotation detection fixture for a battery cell and a winding battery cell detection device. Background Art

[0002] The cell winding process is an extremely important link in the entire battery production process, and the quality of the cell winding process is closely related to the performance of the lithium battery.

[0003] In the production process of lithium batteries, the negative electrode needs to exceed the positive electrode by a certain margin in the width direction, and the separator needs to exceed the negative electrode by a certain margin; the alignment in the width direction is directly determined by the winding process accuracy. When the accuracy is high, the margin size can be smaller and the battery energy density is higher. Since it is easy to offset during the winding process, the small margin leads to a decrease in the battery safety factor. The process accuracy must be ensured, otherwise there will be huge safety hazards to the battery. The alignment of each layer of the pole piece of the winding core is generally detected by X-ray on all four corners of the winding core. When the relative width size between the positive and negative electrodes does not meet the requirements, the equipment automatically alarms and removes defective products. In order to detect the deviation, an X-ray detection mechanism is required. The X-ray detection mechanism directly uses X-ray rays to collect pictures and returns the battery winding quality recognition results through image algorithms.

[0004] General X-ray detection systems all use a one-to-one structure between X-rays and battery cell corners, that is, one X-ray imaging mechanism detects one corner, but X-ray imaging mechanisms are generally expensive, and X-rays themselves have extremely strong radiation, and the large number of them will also result in a high radiation protection cost. In addition, the existing method of fixing battery cells is usually to clamp the battery cells together by two clamps arranged in a single direction. However, in actual use, since the battery cells have a certain weight, the battery cells will be slightly displaced relative to the clamps during the rotation of the battery cells, resulting in the displacement of the corners of the battery cells that actually need to be detected, which is difficult to meet the needs of high-precision detection. Utility Model Content

[0005] The purpose of the utility model includes, for example, providing a multi-angle rotation detection fixture for battery cells, which can improve the problems of high cost of battery cell corner detection and displacement of battery cells during clamping and rotation.

[0006] The purpose of the utility model also includes providing a wound battery cell detection device, which can improve the problems of high cost of battery cell corner detection and displacement of the battery cell during clamping and rotation.

[0007] The embodiments of the present invention can be implemented as follows:

[0008] An embodiment of the utility model provides a multi-angle rotation detection fixture for battery cells, comprising a main shaft, a fixture base plate, a battery cell supporting claw and a clamping claw assembly, wherein the fixture base plate is rotatably arranged around the main shaft; the battery cell supporting claw is arranged on the fixture base plate, and the battery cell supporting claw is used to limit the position of the battery cell along a first direction; the clamping claw assembly is arranged on the fixture base plate, and the clamping claw assembly is used to clamp and fix the battery cell along a second direction; four exposed spaces are formed between the clamping claw assembly and the battery cell supporting claw along the circumferential direction of the main shaft, and the four exposed spaces are used to expose the four corners of the battery cell along a third direction; wherein the first direction and the second direction are coplanar and perpendicular, and the third direction is arranged at an angle to the plane where the first direction and the second direction are located.

[0009] In addition, the battery cell multi-angle rotation detection fixture provided by the embodiment of the utility model may also have the following additional technical features:

[0010] Optionally, the clamp assembly includes a first clamp and a second clamp; the first clamp and the second clamp are slidably arranged on the clamp bottom plate along the second direction, and the distance between the first clamp and the second clamp along the second direction is adjustable to clamp or release the battery cell.

[0011] Optionally, the battery cell multi-angle rotation detection fixture also includes a connecting rod mechanism, which connects the first jaw and the second jaw, and is used to synchronously drive the second jaw to slide away from the first jaw when the first jaw slides away from the second jaw, and the connecting rod mechanism is used to synchronously drive the second jaw to slide close to the first jaw when the first jaw slides close to the second jaw.

[0012] Optionally, the connecting rod mechanism includes a rotating arm, a first swing arm and a second swing arm; the middle part of the rotating arm is rotatably connected to the clamp base plate, the first swing arm and the second swing arm are respectively hinged at both ends of the rotating arm, the end of the first swing arm away from the rotating arm is hinged to the first clamping jaw, and the end of the second swing arm away from the rotating arm is hinged to the second clamping jaw; the first swing arm is used to swing during the sliding of the first clamping jaw, and synchronously drives the second swing arm to swing, so as to drive the second clamping jaw to slide synchronously.

[0013] Optionally, the rotation centerline of the rotating arm coincides with the rotation centerline of the main shaft.

[0014] Optionally, the battery cell multi-angle rotation detection fixture also includes a pushing bearing and a POM shaft; the pushing bearing is fixed to the first clamp; the POM shaft and the main shaft are arranged side by side and spaced apart, and the POM shaft is used to abut against the pushing bearing when the fixture base plate is rotated to a first preset position, so as to push the pushing bearing and the first clamp to slide away from the second clamp.

[0015] Optionally, the multi-angle rotation detection jig for battery cells further includes a driving wheel, an idler wheel and a driven wheel; the driving wheel is connected to the driven wheel by a belt transmission, the driven wheel is connected to the fixture base plate, and the rotation centerline of the driven wheel coincides with the rotation centerline of the main shaft, so that when the driven wheel rotates, the fixture base plate is driven to rotate synchronously around the main shaft, and the idler wheel is used to tension the belt.

[0016] Optionally, the battery cell multi-angle rotation detection fixture also includes a reset mechanism, which is connected to the first jaw and the second jaw, and is used to make the first jaw have a movement tendency to slide close to the second jaw, and to make the second jaw have a movement tendency to slide close to the first jaw.

[0017] The embodiment of the utility model also provides a wound battery cell detection device. The wound battery cell detection device comprises at least one X-ray detection mechanism and at least one battery cell multi-angle rotation detection fixture; the battery cell multi-angle rotation detection fixture is used to rotate the four corners of the battery cell located in the exposed space to the detection position in sequence, and the X-ray detection mechanism is used to detect the battery cell corners located in the detection position.

[0018] Optionally, the wound battery cell detection device further comprises a sensor sheet; the sensor sheet is fixed to one end of the fixture bottom plate, and the sensor sheet is used to output a position signal during the rotation of the fixture bottom plate.

[0019] The beneficial effects of the battery cell multi-angle rotation detection fixture and the winding battery cell detection device of the embodiment of the utility model include, for example:

[0020] A multi-angle rotation detection fixture for battery cells comprises a main shaft, a fixture base plate, a battery cell supporting claw and a clamping claw assembly, wherein the fixture base plate is rotatably arranged around the main shaft; the battery cell supporting claw is arranged on the fixture base plate, and the battery cell supporting claw is used to limit the position of the battery cell along a first direction; the clamping claw assembly is arranged on the fixture base plate, and the clamping claw assembly is used to clamp and fix the battery cell along a second direction; four exposed spaces are formed between the clamping claw assembly and the battery cell supporting claw along the circumferential direction of the main shaft, and the four exposed spaces are used to expose the four corners of the battery cell along a third direction; wherein the first direction and the second direction are coplanar and perpendicular, and the third direction is arranged at an angle to the plane where the first direction and the second direction are located. One battery cell multi-angle rotation detection fixture corresponds to one X-ray imaging mechanism. The battery cell multi-angle rotation detection fixture rotates to meet the four-corner detection, with high detection efficiency. The radiation generated by X-rays is greatly reduced, which is 75% lower than that of one battery cell, which can reduce costs and ensure safety. At the same time, the battery cell supporting claws and clamping claw assemblies clamp and fix the battery cell in two directions perpendicular to each other to prevent displacement of the battery cell during rotation.

[0021] The wound battery cell inspection equipment, including the above-mentioned battery cell multi-angle rotation inspection fixture, can improve the problems of high cost of battery cell corner inspection and displacement during battery cell clamping and rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the overall structure of the battery cell multi-angle rotation detection fixture provided in this embodiment;

[0024] Figure 2 An exploded schematic diagram of the first part of the battery cell multi-angle rotation detection fixture provided in this embodiment;

[0025] Figure 3 An exploded schematic diagram of the first clamping jaw of the battery cell multi-angle rotation detection fixture provided in this embodiment;

[0026] Figure 4 An exploded schematic diagram of the second clamping jaw of the battery cell multi-angle rotation detection fixture provided in this embodiment;

[0027] Figure 5 An exploded schematic diagram of the connecting rod mechanism of the battery cell multi-angle rotation detection fixture provided in this embodiment;

[0028] Figure 6A schematic diagram of the overall structure of the wound battery cell detection device provided in this embodiment;

[0029] Figure 7 A front view of the wound battery cell detection device provided in this embodiment;

[0030] Figure 8 A top view of the wound battery cell detection device provided in this embodiment;

[0031] Fig. 9 A front view of a wound cell detection device provided in this embodiment with a cell removed;

[0032] Fig.10 A top view of a removed battery cell of the wound battery cell detection device provided in this embodiment.

[0033] Icons: 10-cell multi-angle rotation detection fixture; 101-synchronous wheel; 102-clamp pad; 104-clamp bottom plate; 200-cell claw; 108-first positioning block; 109-second positioning block; 110-cell support plate; 300-exposed space; 20-first clamping jaw; 203-mounting block; 207-linear guide; 204-rubber-coated clamping block; 30-second clamping jaw; 400-connecting rod mechanism; 410-rotating arm; 40 4-first swing arm; 420-second swing arm; 201-pushing bearing; 103-POM shaft; 500-driving wheel; 510-idling wheel; 520-driven wheel; 105-induction plate; 106-support column; 107-stopper; 205-first spring; 206-first stopper; 401-deep groove ball bearing one; 402-retaining ring; 405-deep groove ball bearing two; 406-end cover; 407-step bolt shaft; 600-battery cell. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0038] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0040] Combine the following Figures 1 to 10 The battery cell multi-angle rotation detection fixture 10 provided in this embodiment is described in detail.

[0041] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the utility model provides a multi-angle rotation detection fixture 10 for a battery cell, comprising a main shaft, a fixture base plate 104, a battery cell supporting claw 200 and a clamping claw assembly, wherein the fixture base plate 104 is arranged to rotate around the main shaft; the battery cell supporting claw 200 is arranged on the fixture base plate 104, and the battery cell supporting claw 200 is used to limit the position of the battery cell 600 along a first direction; the clamping claw assembly is arranged on the fixture base plate 104, and the clamping claw assembly is used to clamp and fix the battery cell 600 along a second direction; four exposure spaces 300 are formed between the clamping claw assembly and the battery cell supporting claw 200 along the circumferential direction of the main shaft, and the four exposure spaces 300 are used to expose the four corners of the battery cell 600 along a third direction; wherein the first direction and the second direction are coplanar and perpendicular, and the third direction is arranged at an angle to the plane where the first direction and the second direction are located.

[0042] It can be understood that the first direction of this embodiment is the width direction of the clamp bottom plate 104, the second direction is the length direction of the clamp bottom plate 104, and the third direction is the vertical direction.

[0043] The battery cell supporting claw 200 and the clamping claw assembly are jointly arranged on the fixture base plate 104, and the battery cell 600 is clamped and fixed along the first direction and the second direction perpendicular to each other, respectively, to prevent the battery cell 600 from shifting during the rotation of the fixture base plate 104; during the rotation of the fixture base plate 104, the battery cell 600, the battery cell supporting claw 200 and the clamping claw assembly rotate synchronously with the fixture base plate 104; the corners of the battery cell 600 between the battery cell supporting claw 200 and the clamping claw assembly are exposed along the third direction, and the four corners of the battery cell 600 are rotated in turn to correspond to the X-ray detection mechanism, and the X-ray detection mechanism detects the corners of the battery cell 600 exposed in the exposure space 300, and the fixture base plate 104 is rotated to complete the detection of the four corners in turn. Only one X-ray detection mechanism is required for the whole process, and the battery cell multi-angle rotation detection fixture 10 can complete the detection of the battery cell 600 by rotating, which simplifies the structure and can reduce the setting of the X-ray detection mechanism, thereby reducing the detection cost.

[0044] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In this embodiment, the battery cell supporting claw 200 is located between the first clamping claw 20 and the second clamping claw 30; the battery cell supporting claw 200 includes a battery cell support plate 110, a first positioning block 108 and a second positioning block 109; the battery cell support plate 110 is fixed on the fixture bottom plate 104, and the first positioning block 108 and the second positioning block 109 are fixed at opposite sides of the battery cell support plate 110 at intervals along the second direction.

[0045] In other embodiments, the first positioning block 108 and the second positioning block 109 may also be designed to be adjustable along the first direction, so as to clamp and fix the battery cell 600 along the first direction, thereby meeting the clamping and fixing requirements for battery cells 600 of different models.

[0046] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In this embodiment, the clamp assembly includes a first clamp 20 and a second clamp 30; the first clamp 20 and the second clamp 30 are slidably arranged on the clamp bottom plate 104 along the second direction, and the distance between the first clamp 20 and the second clamp 30 along the second direction is adjustable to clamp or release the battery cell 600.

[0047] In the initial state, the first clamp 20 and the second clamp 30 move away from each other to increase the distance between them, and the battery cell 600 is placed on the battery cell supporting claw 200. The battery cell supporting claw 200 limits the movement of the battery cell 600 in the first direction. Then the first clamp 20 and the second clamp 30 move toward each other to clamp and fix the battery cell 600 in the second direction, thereby completing the fixation of the battery cell 600 in the planes where the first direction and the second direction are located.

[0048] Specifically, an exposed space 300 is formed between the first clamping jaw 20 and the first positioning block 108, and an exposed space 300 is formed between the first clamping jaw 20 and the second positioning block 109; an exposed space 300 is formed between the second clamping jaw 30 and the first positioning block 108, and an exposed space 300 is formed between the second clamping jaw 30 and the second positioning block 109; a total of four exposed spaces 300 are formed.

[0049] The first clamping jaw 20 includes a mounting block 203, a linear guide rail 207, and a rubber-coated clamping block 204; the linear guide rail 207 is arranged along the second direction, the mounting block 203 is slidably arranged on the linear guide rail 207, and the rubber-coated clamping block 204 is fixed to one end of the mounting block 203 close to the second clamping jaw 30. The second clamping jaw 30 has the same structure as the first clamping jaw 20, and will not be described in detail.

[0050] Reference Figure 1 and Figure 5 In this embodiment, the battery cell multi-angle rotation detection fixture 10 also includes a connecting rod mechanism 400, which connects the first clamping jaw 20 and the second clamping jaw 30. The connecting rod mechanism 400 is used to synchronously drive the second clamping jaw 30 to slide away from the first clamping jaw 20 when the first clamping jaw 20 slides away from the second clamping jaw 30, and the connecting rod mechanism 400 is used to synchronously drive the second clamping jaw 30 to slide close to the first clamping jaw 20 when the first clamping jaw 20 slides close to the second clamping jaw 30.

[0051] The first clamping jaw 20 approaches the second clamping jaw 30, and the second clamping jaw 30 also approaches the first clamping jaw 20 synchronously under the drive of the connecting rod mechanism 400; the first clamping jaw 20 moves away from the second clamping jaw 30, and the second clamping jaw 30 also moves away from the first clamping jaw 20 synchronously under the drive of the connecting rod mechanism 400. The first clamping jaw 20 and the second clamping jaw 30 move synchronously in opposite directions under the action of the connecting rod mechanism 400. The synchronous sliding of the second clamping jaw 30 can be achieved by driving the first clamping jaw 20 to slide; or the synchronous sliding of the first clamping jaw 20 can be achieved by driving the second clamping jaw 30 to slide.

[0052] Reference Figure 1 and Figure 5 In this embodiment, the connecting rod mechanism 400 includes a rotating arm 410, a first swing arm 404 and a second swing arm 420; the middle part of the rotating arm 410 is rotatably connected to the clamp base plate 104, the first swing arm 404 and the second swing arm 420 are respectively hinged at both ends of the rotating arm 410, the end of the first swing arm 404 away from the rotating arm 410 is hinged to the first clamp 20, and the end of the second swing arm 420 away from the rotating arm 410 is hinged to the second clamp 30; the first swing arm 404 is used to swing during the sliding process of the first clamp 20, and synchronously drive the second swing arm 420 to swing, so as to drive the second clamp 30 to slide synchronously.

[0053] The "middle part of the rotating arm 410" refers to the part between the two ends of the rotating arm 410. The first clamping jaw 20 drives the first swing arm 404 to swing during its movement, the swing of the first swing arm 404 drives the rotating arm 410 to swing, the swing of the rotating arm 410 drives the second swing arm 420 to swing, the first swing arm 404 and the second swing arm 420 are respectively symmetrically hinged at the two ends of the rotating arm 410, and the swinging directions of the first swing arm 404 and the second swing arm 420 are symmetrically structured, driving the second clamping jaw 30 to move synchronously in the opposite direction to the first clamping jaw 20. Alternatively, the movement of the second clamping jaw 30 can also drive the first clamping jaw 20 to slide in the opposite direction through the second swing arm 420, the rotating arm 410 and the first swing arm 404.

[0054] Reference Figure 6 and Figure 7 In this embodiment, the rotation centerline of the rotating arm 410 coincides with the rotation centerline of the main shaft. The middle part of the clamp base plate 104 is arranged to rotate around the main shaft, the first clamping jaw 20 and the second clamping jaw 30 are arranged at both ends of the clamp base plate 104, the connecting rod mechanism 400 is connected between the first clamping jaw 20 and the second clamping jaw 30, and the center of the rotating arm 410 is coaxial with the main shaft.

[0055] Reference Figure 6 and Figure 7 In this embodiment, the battery cell multi-angle rotation detection fixture 10 further includes a push bearing 201 and a POM shaft 103; the push bearing 201 is fixed to the first clamping jaw 20; the POM shaft 103 is arranged side by side and spaced apart from the main shaft, and the POM shaft 103 is used to abut against the push bearing 201 when the fixture bottom plate 104 rotates to the first preset position, so as to push the push bearing 201 and the first clamping jaw 20 to slide away from the second clamping jaw 30. When the fixture bottom plate 104 rotates away from the first preset position, the POM shaft 103 is disengaged from the push bearing 201.

[0056] The push bearing 201 is slidably disposed on the fixture bottom plate 104, and the push bearing 201 is fixed to the first clamping jaw 20. During the rotation of the fixture bottom plate 104, the push bearing 201 is driven to rotate synchronously. When the push bearing 201 rotates to abut against the POM shaft 103, under the abutment of the POM shaft 103, the push bearing 201 moves away from the second clamping jaw 30, thereby driving the first clamping jaw 20 to move away from the second clamping jaw 30, increasing the distance between the first clamping jaw 20 and the second clamping jaw 30, and the battery cell 600 can be placed between the first clamping jaw 20 and the second clamping jaw 30. Specifically, the fixture bottom plate 104 is provided with an avoidance hole along the second direction for the push bearing 201 to pass through the fixture bottom plate 104, and the push bearing 201 slides along the avoidance hole after being abutted.

[0057] Reference Figure 6 and Figure 7In this embodiment, the multi-angle rotation detection fixture battery cell multi-angle rotation detection fixture 10 also includes a driving wheel 500, an idler wheel 510 and a driven wheel 520; the driving wheel 500 is connected to the driven wheel 520 by belt transmission, the driven wheel 520 is connected to the fixture base plate 104, and the rotation center line of the driven wheel 520 coincides with the rotation center line of the main shaft, so that when the driven wheel 520 rotates, the fixture base plate 104 is driven to rotate synchronously around the main shaft; the idler wheel 510 is used to tension the belt.

[0058] The POM shaft 103 is fixed on the idler wheel 510. When the clamp base plate 104 rotates, the push bearing 201 is driven to rotate. When the push bearing 201 rotates to the periphery of the POM shaft 103 and contacts the POM shaft 103, the push bearing 201 is pushed outward, driving the first clamping jaw 20 to move outward.

[0059] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In this embodiment, the battery cell multi-angle rotation detection fixture 10 also includes a reset mechanism, which is connected to the first clamping jaw 20 and the second clamping jaw 30, and is used to make the first clamping jaw 20 have a movement tendency to slide close to the second clamping jaw 30, and to make the second clamping jaw 30 have a movement tendency to slide close to the first clamping jaw 20.

[0060] The reset mechanism includes a first spring 205 and a second spring. The first spring 205 is fixed to one end of the first clamp 20 away from the second clamp 30, and the first spring 205 is used to drive the first clamp 20 to move closer to the second clamp 30. The second spring is fixed to one end of the second clamp 30 away from the first clamp 20, and the second spring is used to drive the second clamp 30 to move closer to the first clamp 20.

[0061] The first clamping jaw 20 slides away from the second clamping jaw 30 when the pushing bearing 201 and the POM shaft 103 are in contact with each other, and the connecting rod mechanism 400 drives the second clamping jaw 30 to move away from the first clamping jaw 20. After the pushing bearing 201 and the POM shaft 103 are separated, the first clamping jaw 20 and the second clamping jaw 30 move towards each other under the action of the first spring 205 and the second spring.

[0062] The reset mechanism includes a first stopper 206 and a second stopper 107 ; the first stopper 206 and the second stopper 107 are fixed at both ends of the clamp bottom plate 104 , and the first spring 205 is fixed between the first stopper 206 and the mounting block 203 . Similarly, the second spring is fixed between the second stopper 107 and the second clamping jaw 30 .

[0063] It can be understood that by providing a corresponding spring for each clamping jaw of the present embodiment, the corresponding clamping jaw can be reset, thereby avoiding the problem of incomplete reset due to spring fatigue caused by the traditional single spring acting on two clamping jaws at the same time.

[0064] Reference Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The embodiment of the utility model also provides a wound battery cell detection device. The wound battery cell detection device includes at least one X-ray detection mechanism and at least one battery cell multi-angle rotation detection fixture 10; the battery cell multi-angle rotation detection fixture 10 is used to rotate the four corners of the battery cell 600 located in the exposure space 300 to the detection position in sequence, and the X-ray detection mechanism is used to detect the corners of the battery cell 600 located at the detection position.

[0065] One X-ray detection mechanism corresponds to a battery cell multi-angle rotation detection fixture 10. During the rotation of the battery cell multi-angle rotation detection fixture 10, the battery cell 600 is driven to rotate, so that the corners of the battery cell 600 are rotated to the detection position of the X-ray detection mechanism in turn to complete the detection.

[0066] Multiple X-ray inspection mechanisms and multiple battery cell multi-angle rotation inspection fixtures 10 are matched to complete the inspection of multiple battery cells 600 at one time.

[0067] Reference Figure 2 In this embodiment, the wound battery cell detection device further includes a sensor sheet 105 ; the sensor sheet 105 is fixed to one end of the fixture bottom plate 104 , and the sensor sheet 105 is used to output a position signal during the rotation of the fixture bottom plate 104 .

[0068] The sensor sheet 105 acts on the sensor to control the start and end of the rotation. When the battery core 600 is rotated 90 degrees, a corresponding sensor will stop the rotation of the mechanism and start the detection, because it is not the structure of this invention.

[0069] Reference Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 According to a battery cell multi-angle rotation detection fixture 10 provided in this embodiment, the working principle of the battery cell multi-angle rotation detection fixture 10 is:

[0070] The synchronous wheel 101 is meshed with the external synchronous belt, and the clamp pad 102 is connected to the synchronous wheel 101 by screws, the POM shaft 103 is fixed, the clamp base plate 104 is fixedly connected to the clamp pad 102, the induction plate 105, the pallet support column 106 and the stopper 107 are fixed to the clamp base plate 104, and fixed on the pallet support column 106 are the first positioning block 108, the second positioning block 109, and the battery cell pallet 110. These three are used to fix the first direction of the battery cell 600.

[0071] The first clamping jaw 20 and the second clamping jaw 30 are fixed on the clamp base plate 104, the push bearing 201 and the push shaft 202 are matched and installed together on the mounting block 203, and the rubber-coated clamping block 204 for fixing the battery cell 600 in the length direction is installed above the mounting block 203. The linear guide rail 207 is fixed on the clamp base plate 104 of the rotating mechanism 10, and the mounting block 203 is slidably set on the linear guide rail 207. The first stop block 206 is fixed on the clamp base plate 104, and the first spring 205 is installed in a hole concentric with the first stop block 206 and the mounting block 203, and the first spring 205 is in a compressed state.

[0072] The deep groove ball bearing 401 and the retaining ring 402 are matched with the shaft hole to be connected with the connecting rod mechanism 400, the rotating arm 410 is matched with the shaft hole of the deep groove ball bearing 401, the deep groove ball bearing 405 is installed on the first swing arm 404 together with the end cover 406 and the step bolt shaft 407, and the first swing arm 404 is connected to the rotating arm 410 on one side and the first clamping jaw 20 on the other side; the connection of the second swing arm 420 is a centrally symmetrical structure with the first swing arm 404.

[0073] When the clamp bottom plate 104 rotates, the push bearing 201 on the first clamping jaw 20 rotates around the fixed POM shaft 103. In the initial position, the POM shaft 103 abuts against the push bearing 201, and the POM shaft 103 applies a contact force away from the center to the first clamping jaw 20, thereby compressing the first spring 205. At this time, the distance between the two rubber-wrapped clamping blocks 204 is greater than the length of the battery cell 600, that is, in a loose state.

[0074] When the pushing bearing 201 on the first clamp 20 leaves the fixed POM shaft 103, the contact force suddenly changes to 0, the POM shaft 103 and the pushing bearing 201 are released from contact, and the mounting block 203 of the first clamp 20 is subjected to the elastic force of the first spring 205, so that the distance between the two rubber-wrapped clamping blocks 204 becomes smaller and clamps the battery cell 600, thereby driving the battery cell 600 to rotate together.

[0075] When the first clamp 20 moves, the first swing arm 404 also swings, and drives the rotating arm 410 to rotate, and then drives the second swing arm 420 to swing, thereby driving the second clamp 30 to move. The connecting rod mechanism 400 makes the first clamp 20 and the second clamp 30 move synchronously, thereby ensuring that the position of the battery cell 600 will not be offset when clamped, and the positioning is accurate, ensuring the quality of imaging under X-ray. When gradually turning 360°, that is, returning to the original position, the push bearing 201 is subjected to the contact force of the POM shaft 103, and gradually loosens the battery cell 600, so that it can be easily unloaded.

[0076] In addition, the sensor sheet 105 acts on the sensor to control the start and end of rotation. Every time the battery cell 600 is rotated 90 degrees to detect the corner, a corresponding sensor will stop the mechanism from rotating and start detection. Since this is not the structure of this invention, it will not be described in detail here.

[0077] The battery cell multi-angle rotation detection fixture 10 provided in this embodiment has at least the following advantages:

[0078] One battery cell multi-angle rotation detection fixture 10 corresponds to one X-ray imaging mechanism. The battery cell multi-angle rotation detection fixture 10 rotates to detect to meet four-corner detection, with high detection efficiency. The radiation generated by X-rays is greatly reduced, which is 75% lower than that of a battery cell 600, thereby reducing costs and ensuring safety.

[0079] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A multi-angle rotation detection fixture for battery cells, characterized in that: include: Spindle; A fixture bottom plate (104), wherein the fixture bottom plate (104) is rotatably arranged around the main axis; A battery cell supporting claw (200), the battery cell supporting claw (200) being arranged on the fixture bottom plate (104), the battery cell supporting claw (200) being used to limit the position of the battery cell (600) along a first direction; A clamping jaw assembly, the clamping jaw assembly being arranged on the clamp bottom plate (104), the clamping jaw assembly being used to clamp and fix the battery core (600) along a second direction; Four exposure spaces (300) are formed between the clamping jaw assembly and the battery cell supporting jaw (200) along the circumferential direction of the main axis, and the four exposure spaces (300) are used to expose four corners of the battery cell (600) along a third direction; The first direction and the second direction are coplanar and perpendicular, and the third direction is arranged at an angle to the plane where the first direction and the second direction are located.

2. The battery cell multi-angle rotation detection fixture according to claim 1, characterized in that: The clamping jaw assembly comprises a first clamping jaw (20) and a second clamping jaw (30); the first clamping jaw (20) and the second clamping jaw (30) are slidably arranged on the clamp base plate (104) along the second direction, and the distance between the first clamping jaw (20) and the second clamping jaw (30) along the second direction is adjustable so as to clamp or release the battery cell (600).

3. The battery cell multi-angle rotation detection fixture according to claim 2, characterized in that: The battery cell multi-angle rotation detection fixture also includes a connecting rod mechanism (400), wherein the connecting rod mechanism (400) connects the first clamping jaw (20) and the second clamping jaw (30), and the connecting rod mechanism (400) is used to synchronously drive the second clamping jaw (30) to slide away from the first clamping jaw (20) when the first clamping jaw (20) slides away from the second clamping jaw (30), and the connecting rod mechanism (400) is used to synchronously drive the second clamping jaw (30) to slide close to the first clamping jaw (20) when the first clamping jaw (20) slides close to the second clamping jaw (30).

4. The battery cell multi-angle rotation detection fixture according to claim 3 is characterized in that: The connecting rod mechanism (400) includes a rotating arm (410), a first swing arm (404) and a second swing arm (420); the middle part of the rotating arm (410) is rotatably connected to the clamp base plate (104); the first swing arm (404) and the second swing arm (420) are respectively hinged at two ends of the rotating arm (410); the end of the first swing arm (404) away from the rotating arm (410) is hinged to the first clamp (20); the end of the second swing arm (420) away from the rotating arm (410) is hinged to the second clamp (30); the first swing arm (404) is used to swing during the sliding of the first clamp (20), and synchronously drive the second swing arm (420) to swing, so as to drive the second clamp (30) to slide synchronously.

5. The battery cell multi-angle rotation detection fixture according to claim 4, characterized in that: The rotation center line of the rotating arm (410) coincides with the rotation center line of the main shaft.

6. The battery cell multi-angle rotation detection fixture according to any one of claims 2 to 5, characterized in that: The battery cell multi-angle rotation detection fixture also includes a push bearing (201) and a POM shaft (103); the push bearing (201) is fixed to the first clamping jaw (20); the POM shaft (103) and the main shaft are arranged side by side and spaced apart, and the POM shaft (103) is used to abut against the push bearing (201) when the fixture base plate (104) is rotated to a first preset position, so as to push the push bearing (201) and the first clamping jaw (20) to slide away from the second clamping jaw (30).

7. The battery cell multi-angle rotation detection fixture according to claim 6, characterized in that: The battery cell multi-angle rotation detection fixture also includes a driving wheel (500), an idler wheel (510) and a driven wheel (520); the driving wheel (500) and the driven wheel (520) are connected to each other by a belt transmission, the driven wheel (520) is connected to the fixture base plate (104), and the rotation center line of the driven wheel (520) coincides with the rotation center line of the main shaft, so that when the driven wheel (520) rotates, the fixture base plate (104) is driven to rotate synchronously around the main shaft; the idler wheel (510) is used to tension the belt.

8. The battery cell multi-angle rotation detection fixture according to any one of claims 2 to 5, characterized in that: The battery cell multi-angle rotation detection fixture also includes a reset mechanism, which is connected to the first clamping jaw (20) and the second clamping jaw (30), and is used to make the first clamping jaw (20) have a movement tendency to slide close to the second clamping jaw (30), and to make the second clamping jaw (30) have a movement tendency to slide close to the first clamping jaw (20).

9. A wound battery cell detection device, characterized in that: The wound battery cell detection equipment comprises at least one X-ray detection mechanism and at least one battery cell multi-angle rotation detection fixture according to any one of claims 1 to 8; the battery cell multi-angle rotation detection fixture is used to rotate four corners of the battery cell (600) located in the exposure space (300) to the detection position in sequence, and the X-ray detection mechanism is used to detect the corners of the battery cell (600) located at the detection position.

10. The wound battery core detection device according to claim 9, characterized in that: The wound battery core detection device further comprises a sensing sheet (105); the sensing sheet (105) is fixed to one end of the fixture bottom plate (104), and the sensing sheet (105) is used to output a position signal during the rotation of the fixture bottom plate (104).

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