Pressure resistance detection mechanism and method for cylindrical battery

Abstract

The invention discloses a voltage withstanding detection mechanism and method for a cylindrical battery, and the mechanism comprises a jig which is provided with a concave part, and the concave part extends in the front-back direction and is configured to be capable of accommodating the cylindrical battery and exposing the negative electrode of the cylindrical battery; the test assembly comprises a first conductive part and a second conductive part, the first conductive part is arranged in the concave part and used for abutting against the cylindrical surface of the cylindrical battery, and the second conductive part is used for abutting against the negative electrode of the cylindrical battery; and the rotary butt-clamping assembly is configured to be used for clamping the cylindrical battery until the cylindrical battery is separated from the jig, and then the cylindrical battery is driven to rotate around the axis of the cylindrical battery. Whether the insulating layer of the cylindrical battery is bad can be automatically detected, the detection efficiency is high, the cylindrical surface of the cylindrical battery can be comprehensively detected, and missing detection is prevented.

Description

Technical Field

[0001] This application relates to the field of cylindrical battery testing technology, and in particular to a voltage withstand testing mechanism and method for cylindrical batteries. Background Technology

[0002] During the production of cylindrical batteries, insulating materials (such as UV-coated insulating adhesive) need to be coated onto the surface of the battery. After production, the insulating layer needs to be inspected for defects, such as gaps or damage that could reduce its insulation performance. There are two existing inspection methods: one is manual visual inspection, which is inefficient and prone to false positives and false negatives; the other is inspection using equipment, where two conductive structures contact the negative electrode and the cylindrical surface of the battery respectively, and a voltage is applied for withstand voltage testing. However, this method also cannot guarantee that the entire cylindrical surface of the battery is inspected, and it is prone to false negatives as well. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a withstand voltage testing mechanism for cylindrical batteries, which can efficiently and comprehensively detect whether there are defects in the insulation layer of cylindrical batteries.

[0004] This application also proposes a method for testing the withstand voltage of a cylindrical battery, which is applied to the withstand voltage testing mechanism of the aforementioned cylindrical battery.

[0005] The withstand voltage testing mechanism for a cylindrical battery according to an embodiment of the first aspect of this application includes: A fixture having a recess extending in a front-rear direction and configured to accommodate a cylindrical battery and expose the negative terminal of the cylindrical battery. The test component includes a first conductive part and a second conductive part. The first conductive part is disposed in the recess and is used to abut against the cylindrical surface of the cylindrical battery. The second conductive part is used to abut against the negative electrode of the cylindrical battery. A rotating clamping assembly is configured to clamp the cylindrical battery until it is detached from the fixture, and then drive the cylindrical battery to rotate about its own axis.

[0006] The withstand voltage detection mechanism for cylindrical batteries according to the embodiments of this application has at least the following beneficial effects: The withstand voltage testing mechanism for cylindrical batteries in this embodiment can automatically detect whether there are defects in the insulation layer of cylindrical batteries. It has high testing efficiency and can comprehensively test the cylindrical surface of the cylindrical battery to prevent missed detections.

[0007] According to some embodiments of this application, two fixtures are arranged opposite each other, the two fixtures are provided with the recess on the opposite side, and both fixtures are provided with the first conductive part; The two fixtures are capable of opening and closing vertically to clamp or release the cylindrical battery.

[0008] According to some embodiments of this application, the rotary clamp assembly includes: The first clamping part has first clamping heads rotatably disposed on the front and rear sides of the fixture respectively; A first driving unit is used to drive the first clamping unit to move up and down. The second driving unit is used to drive the first clamping heads on both sides to move towards each other so as to abut against both ends of the cylindrical battery. Specifically, when the first clamping head abuts against both ends of the cylindrical battery, the first driving part can drive the first clamping part to move upward so that the cylindrical battery is detached from the fixture.

[0009] According to some embodiments of this application, the rotary clamp assembly further includes: A third drive unit is tractively connected to at least one side of the first clamping head, and is used to drive the first clamping head to rotate.

[0010] According to some embodiments of this application, the test component further includes: The fourth driving unit is used to drive the second conductive part to move upward to align with the cylindrical battery on the fixture, or to move downward to avoid the rotating clamp assembly; The fifth driving unit is used to drive the second conductive part to move back and forth, so that the second conductive part abuts against the negative terminal of the cylindrical battery or moves away from the cylindrical battery.

[0011] According to some embodiments of this application, the withstand voltage testing mechanism for the cylindrical battery further includes: Temporary storage rack, the temporary storage rack being used to store the cylindrical battery; A transport assembly for transferring the cylindrical battery from the temporary storage rack to the fixture.

[0012] According to some embodiments of this application, the temporary storage rack is provided with a storage slot extending in a front-to-back direction, the storage slot being configured to accommodate the cylindrical battery, and the handling assembly includes: A conveying unit configured to move between the temporary storage rack and the fixture; The second clamping part is connected to the conveying part, and second clamping heads are respectively provided on the front and rear sides of the temporary storage rack; The sixth driving unit is used to drive the second clamping unit to move up and down; The seventh driving unit is used to drive the second clamping heads on the front and rear sides of the temporary storage rack to move towards each other so as to abut against the two ends of the cylindrical battery.

[0013] According to some embodiments of this application, the withstand voltage testing mechanism for the cylindrical battery further includes: The frame has a ninth drive unit on each of the front and rear sides of the temporary storage rack. Each of the ninth drive units on both sides is connected to a fourth base and can drive the fourth base to move between the temporary storage rack and the fixture. The conveying assembly and the rotating clamping assembly are both disposed on the fourth base on both sides.

[0014] According to some embodiments of this application, the first conductive portion includes: A copper inlay block is fixed in the recess and has an arc-shaped groove adapted to the cylindrical battery. A conductive sponge is disposed on the inner wall of the arc-shaped groove for adhering to the cylindrical surface of the cylindrical battery.

[0015] The voltage withstand testing method for a cylindrical battery according to the second aspect of this application, applied to the voltage withstand testing mechanism for the cylindrical battery described in the first aspect, includes the following steps: The cylindrical battery is loaded into the fixture, such that the first conductive part abuts against the cylindrical surface of the cylindrical battery and the second conductive part abuts against the negative electrode of the cylindrical battery; A set voltage is applied to the first conductive part and the second conductive part to perform a withstand voltage test; After rotating the cylindrical battery by a set angle, the withstand voltage test is performed again. Repeat the previous step several times.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the withstand voltage testing mechanism for a cylindrical battery according to an embodiment of this application; Figure 2 This is a schematic diagram of the state of the test component in an embodiment of this application when the two fixtures are open; Figure 3 This is a schematic diagram showing the state of the two fixtures in an embodiment of this application when they are open; Figure 4 This is a schematic cross-sectional view of the two fixtures in an embodiment of this application when they are open; Figure 5 This is a schematic diagram of the structure of the rotary clamping assembly and the lower fixture according to an embodiment of this application; Figure 6 This is a schematic diagram of the transport assembly and temporary storage rack according to an embodiment of this application; Figure 7 This is a schematic diagram of the connection structure between the rotary clamp assembly and the conveying assembly according to an embodiment of this application; Figure 8 This is a schematic diagram of the mounting structure of the second conductive part according to an embodiment of this application.

[0018] Icon labels: Cylindrical battery 10; Fixture 100, pressure sensor 110; Test component 200, first conductive part 210, arc groove 211, copper inlay block 212, conductive sponge 213, second conductive part 220, fourth driving part 230, fifth driving part 240, withstand voltage tester 250, mounting part 260, lifting frame 270; Rotary clamping assembly 300, first clamping part 310, first clamping head 311, first driving part 320, second driving part 330, third driving part 340, first base 350, and first moving frame 360; Temporary storage rack 400, storage slot 401; The conveying assembly 500, the conveying unit 510, the second base 511, the second moving frame 512, the second clamping unit 520, the second clamping head 521, the sixth drive unit 530, and the seventh drive unit 540 are included. Fourth base 600; Frame 700, eighth drive unit 710, third base 720, ninth drive unit 730. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are applied to the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 should not be construed as a limitation of this application.

[0021] In the description of this application, "multiple" refers to two or more. The use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or the order in which the technical features are indicated.

[0022] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0023] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a pressure testing mechanism for a cylindrical battery according to an embodiment of this application includes: a fixture 100, a testing component 200, and a rotating clamping component 300.

[0024] The fixture 100 is provided with a recess that extends in the front-rear direction and is configured to accommodate the cylindrical battery 10 and expose the negative terminal of the cylindrical battery 10.

[0025] The test assembly 200 includes a first conductive portion 210 and a second conductive portion 220. The first conductive portion 210 is disposed in the recess and is used to abut against the cylindrical surface of the cylindrical battery 10. The second conductive portion 220 is used to abut against the negative electrode of the cylindrical battery 10. It should be noted that the cylindrical surface of the cylindrical battery 10 is the outer circumferential surface of the insulating layer.

[0026] The rotating clamp assembly 300 is configured to clamp the cylindrical battery 10 until it is detached from the fixture 100, and then drive the cylindrical battery 10 to rotate around its own axis. It should be noted that after the rotating clamp assembly 300 drives the cylindrical battery 10 to rotate around its own axis, it can put the cylindrical battery 10 back into the fixture 100.

[0027] In this embodiment, the withstand voltage testing mechanism for a cylindrical battery allows the cylindrical battery 10 to be placed in a fixture 100. The first conductive part 210 abuts against the cylindrical surface of the cylindrical battery 10, and the second conductive part 220 abuts against the negative terminal of the cylindrical battery 10. A set voltage is then applied to the first conductive part 210 and the second conductive part 220 to perform a first withstand voltage test, detecting any defects such as white leakage in the insulation layer of the cylindrical battery 10 in contact with the first conductive part 210. After the first withstand voltage test, the rotating clamping assembly 300 clamps the cylindrical battery 10 until it is detached from the fixture 100. The cylindrical battery 10 is then rotated around its own axis by a set angle and returned to the fixture 100 for a second withstand voltage test. This process is repeated N times as needed to comprehensively test the cylindrical surface of the cylindrical battery 10, preventing missed detections. Furthermore, by adopting the above structure, the insulation layer of the cylindrical battery 10 can be automatically detected for defects, resulting in high testing efficiency.

[0028] It should be noted that the above-mentioned set voltage may vary depending on the performance requirements; for example, the set voltage may be 400V. Furthermore, the length of the recess is not less than the length of the cylindrical surface of the cylindrical battery 10; and the number of times the withstand voltage test is repeated is sufficient to ensure that every position on the cylindrical surface of the cylindrical battery 10 can be fully detected.

[0029] Reference Figure 1 As shown, in some embodiments of this application, the test assembly 200 further includes a withstand voltage tester 250, which is electrically connected to the first conductive part 210 and the second conductive part 220. When the first conductive part 210 abuts against the cylindrical surface of the cylindrical battery 10 and the second conductive part 220 abuts against the negative terminal of the cylindrical battery 10, a set voltage can be applied through the withstand voltage tester 250. If there is a white leakage in the insulation layer of the cylindrical battery 10, the voltage at the white leakage point will be conducted, and the withstand voltage tester 250 will alarm, indicating that the insulation performance of the cylindrical battery 10 is unqualified.

[0030] Reference Figure 1 As shown, in some embodiments of this application, the pressure resistance testing mechanism for cylindrical batteries further includes a frame 700, on which the fixture 100, the testing component 200, and the rotating clamping component 300 are all mounted, and the frame 700 provides a mounting and support carrier.

[0031] Reference Figures 1 to 3 As shown, in some embodiments of this application, two jigs 100 are arranged vertically opposite each other, and the two jigs 100 are provided with recesses on their opposite sides. A first conductive part 210 is fixedly provided in the recesses of the two jigs 100. The two jigs 100 can open and close vertically to clamp or release the cylindrical battery 10.

[0032] By setting two fixtures 100, on the one hand, a certain clamping force can be applied to the cylindrical battery 10 to prevent the cylindrical battery 10 from shifting during testing, thereby improving the reliability of the testing; on the other hand, the contact area with the cylindrical surface of the cylindrical battery 10 can be increased during a single test, thereby improving the testing efficiency.

[0033] Based on the above embodiments, when performing a withstand voltage test on the cylindrical battery 10, the cylindrical battery 10 can be placed on the lower first conductive part 210 with the negative terminal of the cylindrical battery 10 facing the second conductive part 220. Then, the two jigs 100 are closed to clamp the cylindrical battery 10. Then, the second conductive part 220 is brought into contact with the negative terminal of the cylindrical battery 10. Then, a set voltage is applied using the withstand voltage tester 250 to perform a withstand voltage test. After one test, the two jigs 100 can be released from the cylindrical battery 10. Then, the cylindrical battery 10 is rotated at a certain angle using the rotating clamp assembly 300, and the next withstand voltage test is performed.

[0034] Reference Figure 2 and Figure 3 As shown, in some embodiments of this application, to improve detection efficiency, multiple recesses can be arranged side-by-side on the fixture 100 to simultaneously detect multiple cylindrical batteries 10. Similarly, multiple first conductive portions 210 and second conductive portions 220 are also provided to accommodate the multiple cylindrical batteries 10. For example, in some embodiments, a fixture 100 has four recesses, each recess corresponding to a first conductive portion 210, and every two vertically opposite first conductive portions 210 correspond to a second conductive portion 220. The withstand voltage tester 250 has four channels to detect the four cylindrical batteries 10 respectively.

[0035] It should be noted that to achieve the vertical opening and closing of the two jigs 100, the lower jig 100 can be fixed to the frame 700, while the upper jig 100 is raised and lowered on the frame 700; of course, it can also be arranged in reverse. It should be noted that the lower jig 100 described in this article refers to the lower jig 100 of the two jigs 100, while the upper jig 100 refers to the upper jig 100 of the two jigs 100.

[0036] Reference Figure 3 and Figure 4 As shown, in some embodiments of this application, the first conductive part 210 includes a copper-inlaid block 212 and a conductive sponge 213. The copper-inlaid block 212 is fixed in the recess of the fixture 100 and has an arc-shaped groove 211 adapted to the cylindrical battery. The conductive sponge 213 is disposed on the inner wall of the arc-shaped groove 211 for fitting against the cylindrical surface of the cylindrical battery 10. By providing the conductive sponge 213, the cylindrical battery 10 is prevented from being damaged. In addition, the copper-inlaid block 212 is connected to a conductive block, which is used to connect wires.

[0037] Reference Figure 2 and Figure 8 As shown, in some embodiments of this application, the second conductive part 220 includes a probe.

[0038] Reference Figure 2 As shown, in some embodiments of this application, a pressure sensor 110 is provided on the lower fixture 100. The pressure sensor 110 is used to detect the clamping force when the two fixtures 100 are closed, so as to prevent the cylindrical battery 10 from being damaged due to excessive clamping force.

[0039] Reference Figure 2 As shown, in some embodiments of this application, one of the two fixtures 100 is provided with a first positioning part extending vertically, and the other is provided with a second positioning part. The first positioning part and the second positioning part are a concave-convex mating structure, which is used to prevent the two fixtures 100 from generating horizontal relative displacement after the two fixtures 100 are closed, so as to ensure the reliability of the detection.

[0040] Reference Figure 1 and Figure 5 As shown, in some embodiments of this application, the rotating clamp assembly 300 includes a first clamping part 310, a first driving part 320, and a second driving part 330. The first clamping part 310 has first clamping heads 311 rotatably disposed on the front and rear sides of the lower fixture 100, and the rotation axis of the first clamping heads 311 extends in the front-rear direction. The first driving part 320 is used to drive the first clamping part 310 to move up and down. The second driving part 330 is used to drive the first clamping heads 311 on the front and rear sides to move towards each other to abut against the two ends of the cylindrical battery 10. When the first clamping heads 311 on the front and rear sides abut against the two ends of the cylindrical battery 10, the first driving part 320 can drive the first clamping part 310 to move upward so that the cylindrical battery 10 is disengaged from the lower fixture 100. Afterward, rotating the first clamping heads 311 can drive the cylindrical battery 10 to rotate around its own axis.

[0041] When rotating the cylindrical battery 10 using the rotating clamp assembly 300 of this embodiment, the first clamping head 311 is first aligned coaxially with the cylindrical battery 10, and then the first clamping heads 311 on the front and rear sides are moved towards each other to clamp the two ends of the cylindrical battery 10. Then the first clamping part 310 is moved upward to drive the cylindrical battery 10 to disengage from the lower fixture 100. Then the first clamping head 311 is rotated to drive the cylindrical battery 10 to rotate at a set angle. Finally, the cylindrical battery 10 is placed back into the lower fixture 100.

[0042] In this embodiment, two first clamping parts 310 are provided, located on the front and rear sides of the lower fixture 100 respectively, and a first clamping head 311 is rotatably provided on each of the two first clamping parts 310; two first driving parts 320 and two second driving parts 330 are each provided accordingly. The first clamping head 311 can be cylindrical, and two first clamping heads 311 are provided for each cylindrical battery 10.

[0043] Reference Figure 5 As shown, in some embodiments of this application, the rotary clamping assembly 300 further includes a third drive unit 340, which is tractively connected to at least one of the first clamping heads 311 and is used to drive the first clamping heads 311 to rotate, resulting in a high degree of automation. It should be noted that the at least one first clamping head 311 described in this embodiment refers to at least one of the two first clamping heads 311 (front-to-back) corresponding to one cylindrical battery 10. Obviously, to reduce the use of power components and thus reduce costs, the third drive unit 340 is tractively connected to one of the two front-to-back first clamping heads 311.

[0044] Reference Figure 1 and Figure 5 As shown, in some embodiments of this application, the rotary clamping assembly 300 further includes two first bases 350 and two first movable frames 360. The two first bases 350 are respectively connected to the frame 700 and are located on the front and rear sides of the lower fixture 100, respectively, corresponding to the first clamping portions 310 on the front and rear sides. The two first movable frames 360 are slidably mounted on the two first bases 350, and two second driving units 330 are respectively disposed on the two first bases 350 and are drive-connected to the corresponding first movable frames 360 to drive the first movable frames 360 to move back and forth. The two first clamping portions 310 are slidably mounted on the corresponding first movable frames 360, and two first driving units 320 are respectively disposed on the two first movable frames 360 and are drive-connected to the corresponding first clamping portions 310 to drive the first clamping portions 310 to move up and down. Obviously, the second driving units 330 drive the first movable frames 360 to move back and forth, thereby driving the first clamping portions 310 to move back and forth.

[0045] It should be noted that both the first drive unit 320 and the second drive unit 330 can be motor screw mechanisms. In addition, the first clamping head 311 can be rotatably mounted on the first clamping unit 310 via a bearing assembly.

[0046] It should be noted that when multiple first conductive parts 210 are arranged side by side on the fixture 100 to detect multiple cylindrical batteries 10, multiple first clamping heads 311 are also provided. For example, as Figure 6As shown, a fixture 100 is provided with four first conductive parts 210, and each first clamping part 310 is provided with four first clamping heads 311. Furthermore, to achieve rotation of the four first clamping heads 311 on one of the first clamping parts 310, the third drive part 340 can adopt a combination structure of a motor, a synchronous belt, and synchronous pulleys. One third drive part 340 can be provided for each of the four first clamping heads 311, or one third drive part 340 can be provided for every two first clamping heads 311. When two are grouped together, the synchronous belt must simultaneously engage with the synchronous pulleys on the motor side and the synchronous pulleys on the two first clamping heads 311 sides. Of course, the third drive part 340 can also adopt other drive structures that meet the requirements.

[0047] The above only describes the adjustment of the first clamping part 310 in the front-back direction and the vertical direction. In order to make the first clamping head 311 coaxially aligned with the cylindrical battery 10, alignment in the left-right direction is also required. There are two ways to do this: one is to fix the position of the first clamping part 310 in the left-right direction, and the positions of the first clamping head 311 and the first conductive part 210 in the left-right direction are always consistent; the other is that the first clamping part 310 also has a degree of freedom in the left-right direction, and a corresponding power element is provided. For the latter, the first base 350 can be slidably connected to the frame 700 in the left and right directions, and a power element is provided on the frame 700 to drive the first base 350 to move left and right.

[0048] Reference Figure 1 , Figure 2 and Figure 8 As shown, in some embodiments of this application, the lower fixture 100 is fixed to the frame 700, and the upper fixture 100 is vertically mounted on the frame 700. An eighth drive unit 710 is provided on the frame 700 to drive the upper fixture 100 to move up and down. The eighth drive unit 710 may be a motor-screw mechanism. Additionally, the test assembly 200 also includes a mounting part 260, a fourth drive unit 230, and a fifth drive unit 240.

[0049] The mounting part 260 is movably connected to the frame 700 and located at the rear of the fixture 100 on the lower side. The mounting part 260 is used to mount the second conductive part 220 and provides a mounting carrier. The fourth drive part 230 is driven to the mounting part 260 and is used to drive the mounting part 260 to move up and down, thereby driving the second conductive part 220 to move up and down. The fourth drive part 230 can drive the second conductive part 220 to move upward to align with the cylindrical battery 10 on the lower fixture 100, or to move downward to avoid the rotating clamping assembly 300. The fifth drive part 240 is driven to the mounting part 260 and is used to drive the mounting part 260 to move back and forth, thereby driving the second conductive part 220 to move back and forth, so that the second conductive part 220 abuts against the negative terminal of the cylindrical battery 10 or moves away from the cylindrical battery.

[0050] In this embodiment, when the test assembly 200 is used, after the two fixtures 100 are closed and clamp the cylindrical battery 10, the fourth drive unit 230 drives the mounting part 260 to move upward so that the second conductive part 220 is aligned with the cylindrical battery 10 on the lower fixture 100. Then, the fifth drive unit 240 drives the mounting part 260 to move back and forth so that the second conductive part 220 abuts against the negative terminal of the cylindrical battery 10. Then, the withstand voltage tester 250 is used to perform withstand voltage testing. After the test is completed, the fifth drive unit 240 drives the mounting part 260 to move back and forth so that the second conductive part 220 is away from the cylindrical battery 10. Then, the fourth drive unit 230 drives the mounting part 260 to move downward so that the second conductive part 220 avoids the rotating clamping assembly 300, so as to avoid interference with the operation of the rotating clamping assembly 300.

[0051] Reference Figure 8 As shown, in some embodiments of this application, both the fourth drive unit 230 and the fifth drive unit 240 can be cylinders; the frame 700 is provided with a third base 720, the fixture 100 on the lower side is fixed on the third base 720, the fourth drive unit 230 is fixed on the third base 720, the test assembly 200 also includes a lifting frame 270, the lifting frame 270 is connected to the output end of the fourth drive unit 230 and can be raised and lowered under its drive, the fifth drive unit 240 is fixed on the lifting frame 270, and the mounting part 260 is connected to the output end of the fifth drive unit 240 and can move back and forth under its drive.

[0052] Reference Figure 1 and Figure 6 As shown, in some embodiments of this application, the withstand voltage testing mechanism for cylindrical batteries further includes a temporary storage rack 400 and a conveying assembly 500. The temporary storage rack 400 is disposed on the frame 700 and is used to store cylindrical batteries 10. The conveying assembly 500 is used to transfer the cylindrical batteries 10 stored in the temporary storage rack 400 to the lower fixture 100, specifically to the first conductive part 210 of the lower fixture 100. This allows for automatic feeding and improves work efficiency. In addition, by setting up the temporary storage rack 400, a new batch of cylindrical batteries 10 can be placed on the temporary storage rack 400 in advance when testing the previous batch of cylindrical batteries 10, reducing the subsequent feeding time and improving work efficiency.

[0053] Reference Figure 1 and Figure 6As shown, in some embodiments of this application, the temporary storage rack 400 is provided with a storage slot 401 extending in the front-to-back direction. The storage slot 401 is configured to accommodate the cylindrical battery 10. The conveying assembly 500 includes a conveying section 510, a second clamping section 520, a sixth driving section 530, and a seventh driving section 540. The conveying section 510 is configured to move left and right between the temporary storage rack 400 and the fixture 100. The second clamping section 520 is connected to the conveying section 510 and has second clamping heads 521 respectively provided on the front and rear sides of the temporary storage rack 400. The sixth driving section 530 is used to drive the second clamping section 520 to move up and down. The seventh driving section 540 is used to drive the second clamping heads 521 on the front and rear sides of the temporary storage rack 400 to move towards each other to abut against both ends of the cylindrical battery 10.

[0054] Specifically, there are two of each of the following units: the conveying unit 510, the second clamping unit 520, the sixth driving unit 530, and the seventh driving unit 540, which are located on the front and rear sides of the temporary storage rack 400, respectively. Each of the two second clamping units 520 is provided with a second clamping head 521.

[0055] When the transport assembly 500 of this embodiment loads materials, it first drives the two second clamping parts 520 to move up and down through the two sixth drive units 530 until the second clamping head 521 is aligned with the cylindrical battery 10 on the temporary storage rack 400. Then, it uses the two seventh drive units 540 to drive the two second clamping parts 520 to move back and forth in opposite directions to clamp the two ends of the cylindrical battery 10. Then, it drives the two second clamping parts 520 to move up and down through the two sixth drive units 530 until the cylindrical battery 10 is removed from the storage slot 401. Then, it moves the two conveying parts 510 to the front and rear sides of the lower fixture 100. The second clamping parts 520 are driven to move through the sixth drive units 530 and the seventh drive units 540 to place the cylindrical battery 10 on the first conductive part 210. After placement, the transport assembly 500 is reset.

[0056] It should be noted that when the handling assembly 500 is in its initial position, the two conveying units 510 are located on the front and rear sides of the temporary storage rack 400.

[0057] Reference Figure 1 , Figure 6 and Figure 7As shown, in some embodiments of this application, the conveying unit 510 includes a second base 511 and a second movable frame 512. The second base 511 is slidably connected to the frame 700 from left to right. A ninth drive unit 730 is provided on the frame 700 to drive the second base 511 to move left and right. The second movable frame 512 is slidably mounted on the second base 511 from front to back. A seventh drive unit 540 is provided on the second base 511 and is driveably connected to the second movable frame 512 to drive the second movable frame 512 to move back and forth. A second clamping part 520 is slidably mounted on the second movable frame 512 from top to bottom. A sixth drive unit 530 is provided on the second movable frame 512 and is driveably connected to the second clamping part 520 to drive the second clamping part 520 to move up and down. Obviously, the seventh drive unit 540 drives the second movable frame 512 to move back and forth, thereby driving the second clamping part 520 to move back and forth.

[0058] Specifically, the rack 700 has a ninth drive unit 730 on the front and rear sides of the temporary storage rack 400, respectively, to correspond to the two conveying units 510.

[0059] It is conceivable that the number of cylindrical batteries 10 that can be stored on the temporary storage rack 400 can be consistent with the number of cylindrical batteries 10 that can be detected on the fixture 100. In addition, cylindrical second clamping heads 521 can be provided on the second clamping part 520, and the number of second clamping heads 521 is the same as the number of first clamping heads 311.

[0060] Reference Figure 1 and Figure 7 As shown, in some embodiments of this application, the ninth drive units 730 on both the front and rear sides of the temporary storage rack 400 are connected to the fourth base 600. The ninth drive units can drive the fourth base 600 to move left and right between the temporary storage rack 400 and the fixture 100. The transport assembly 500 is disposed on the fourth base 600 on both the front and rear sides, and the rotating clamping assembly 300 is disposed on the fourth base 600 on both the front and rear sides. Specifically, the first base 350 and the second base 511 located on the front side are fixed on the fourth base 600 on the front side, and the first base 350 and the second base 511 located on the rear side are fixed on the fourth base 600 on the rear side.

[0061] By adopting the above configuration, the left and right synchronous movement of the conveying assembly 500 and the rotating clamping assembly 300 can be achieved simply by having the ninth drive unit 730 on both sides drive the corresponding fourth base 600 to move synchronously left and right. The advantage of this is that when inspecting the Nth (N is greater than 1) batch of cylindrical batteries 10, while the conveying assembly 500 loads the cylindrical batteries 10 on the temporary storage rack 400 onto the fixture 100 below, the rotating clamping assembly 300 can unload the previous batch of cylindrical batteries 10 from the fixture 100. It is only necessary to set up a device for receiving the cylindrical batteries 10 after inspection on the side of the fixture 100 away from the temporary storage rack 400.

[0062] It is conceivable that the ninth drive unit 730 could be a mobile module.

[0063] This application also proposes a voltage withstand testing method for cylindrical batteries, applied to the voltage withstand testing mechanism of the cylindrical batteries described in the above embodiments, comprising the following steps: The cylindrical battery 10 is loaded into the fixture 100, so that the first conductive part 210 abuts against the cylindrical surface of the cylindrical battery 10 and the second conductive part 220 abuts against the negative electrode of the cylindrical battery 10. A set voltage is applied to the first conductive part 210 and the second conductive part 220 to perform a withstand voltage test. After rotating the cylindrical battery 10 to a set angle, perform the withstand voltage test again. Repeat the previous step several times.

[0064] By using the above method, the cylindrical surface of the cylindrical battery 10 can be comprehensively inspected, preventing missed detections.

[0065] The following describes the steps of a specific embodiment of a cylindrical battery withstand voltage testing method based on the withstand voltage testing mechanism of the cylindrical battery described in the first aspect embodiment above, which includes: S1. Load the cylindrical battery 10 onto the first conductive part 210 of the lower fixture 100, and make the negative terminal of the cylindrical battery 10 face the second conductive part 220. S2. Bring the two fixtures 100 together so that the first conductive part 210 is pressed against the cylindrical surface of the cylindrical battery 10. S3. The second conductive part 220 is brought into contact with the negative terminal of the cylindrical battery 10, and the first withstand voltage test is performed using the withstand voltage tester 250. S4. Open the two fixtures 100 vertically, adjust the second conductive part 220 to avoid the moving path of the rotating clamping assembly 300, and then use the rotating clamping assembly 300 to clamp the two ends of the cylindrical battery 10 in sequence, move the cylindrical battery 10 upward by a set distance, move the cylindrical battery 10 around its own axis by a set angle, and put the cylindrical battery 10 back onto the first conductive part 210 of the fixture 100 on the lower side. S5. Bring the two fixtures 100 together, then bring the second conductive part 220 against the negative terminal of the cylindrical battery 10, and then use the withstand voltage tester 250 to perform a second withstand voltage test.

[0066] In step S1, the cylindrical batteries 10 stored on the temporary storage rack 400 can be loaded onto the first conductive part 210 of the fixture 100 below using the conveying component 500; when loading the Nth (N is greater than 1) batch of cylindrical batteries 10, while loading the cylindrical batteries 10 on the temporary storage rack 400 onto the fixture 100 below using the conveying component 500, the previous batch of cylindrical batteries 10 is unloaded using the rotating clamping component 300.

[0067] In step S3, the first withstand voltage test using the withstand voltage tester 250 specifically involves applying a set pressure (e.g., 400V) to the withstand voltage tester 250 and detecting for a set time (e.g., 2 seconds). If a white leakage defect is detected, the voltage at the leakage point will conduct, and the withstand voltage tester 250 will issue an alarm. Furthermore, the second withstand voltage test using the withstand voltage tester 250 in step S5 follows the same method as the first withstand voltage test.

[0068] In step S4, the angle can be set to 90 degrees.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine different embodiments or examples described in this specification.

[0070] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A withstand voltage testing mechanism for a cylindrical battery, characterized in that, include: A fixture having a recess extending in a front-rear direction and configured to accommodate a cylindrical battery and expose the negative terminal of the cylindrical battery. The test component includes a first conductive part and a second conductive part. The first conductive part is disposed in the recess and is used to abut against the cylindrical surface of the cylindrical battery. The second conductive part is used to abut against the negative electrode of the cylindrical battery. A rotating clamping assembly is configured to clamp the cylindrical battery until it is detached from the fixture, and then drive the cylindrical battery to rotate about its own axis.

2. The withstand voltage testing mechanism for a cylindrical battery according to claim 1, characterized in that, Two fixtures are arranged opposite each other, and the two fixtures are provided with the recess on the opposite side, and both fixtures are provided with the first conductive part; The two fixtures are capable of opening and closing vertically to clamp or release the cylindrical battery.

3. The withstand voltage testing mechanism for a cylindrical battery according to claim 1, characterized in that, The rotary clamp assembly includes: The first clamping part has first clamping heads rotatably disposed on the front and rear sides of the fixture respectively; A first driving unit is used to drive the first clamping unit to move up and down. The second driving unit is used to drive the first clamping heads on both sides to move towards each other so as to abut against both ends of the cylindrical battery. Specifically, when the first clamping head abuts against both ends of the cylindrical battery, the first driving part can drive the first clamping part to move upward so that the cylindrical battery is detached from the fixture.

4. The withstand voltage testing mechanism for a cylindrical battery according to claim 3, characterized in that, The rotary clamp assembly further includes: A third drive unit is tractively connected to at least one side of the first clamping head, and is used to drive the first clamping head to rotate.

5. The withstand voltage testing mechanism for a cylindrical battery according to claim 1, characterized in that, The testing components also include: The fourth driving unit is used to drive the second conductive part to move upward to align with the cylindrical battery on the fixture, or to move downward to avoid the rotating clamp assembly; The fifth driving unit is used to drive the second conductive part to move back and forth, so that the second conductive part abuts against the negative terminal of the cylindrical battery or moves away from the cylindrical battery.

6. The withstand voltage testing mechanism for a cylindrical battery according to claim 1, characterized in that, The withstand voltage testing mechanism for the cylindrical battery also includes: Temporary storage rack, the temporary storage rack being used to store the cylindrical battery; A transport assembly for transferring the cylindrical battery from the temporary storage rack to the fixture.

7. The withstand voltage testing mechanism for a cylindrical battery according to claim 6, characterized in that, The temporary storage rack is provided with a storage slot extending in the front-to-back direction, the storage slot being configured to accommodate the cylindrical battery, and the handling assembly includes: A conveying unit configured to move between the temporary storage rack and the fixture; The second clamping part is connected to the conveying part, and second clamping heads are respectively provided on the front and rear sides of the temporary storage rack; The sixth driving unit is used to drive the second clamping unit to move up and down; The seventh driving unit is used to drive the second clamping heads on the front and rear sides of the temporary storage rack to move towards each other so as to abut against the two ends of the cylindrical battery.

8. The withstand voltage testing mechanism for a cylindrical battery according to claim 7, characterized in that, The withstand voltage testing mechanism for the cylindrical battery also includes: The frame has a ninth drive unit on each of the front and rear sides of the temporary storage rack. Each of the ninth drive units on both sides is connected to a fourth base and can drive the fourth base to move between the temporary storage rack and the fixture. The conveying assembly and the rotating clamping assembly are both disposed on the fourth base on both sides.

9. The withstand voltage testing mechanism for a cylindrical battery according to claim 1, characterized in that, The first conductive part includes: A copper inlay block is fixed in the recess and has an arc-shaped groove adapted to the cylindrical battery. A conductive sponge is disposed on the inner wall of the arc-shaped groove for adhering to the cylindrical surface of the cylindrical battery.

10. A method for testing the withstand voltage of a cylindrical battery, applied to the withstand voltage testing mechanism of the cylindrical battery according to any one of claims 1 to 9, characterized in that, Includes the following steps: The cylindrical battery is loaded into the fixture, such that the first conductive part abuts against the cylindrical surface of the cylindrical battery and the second conductive part abuts against the negative electrode of the cylindrical battery; A set voltage is applied to the first conductive part and the second conductive part to perform a withstand voltage test; After rotating the cylindrical battery by a set angle, the withstand voltage test is performed again. Repeat the previous step several times.

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