Battery cell detection equipment for energy storage module production and detection method thereof

Abstract

The invention discloses battery cell detection equipment for energy storage module production and a detection method thereof, and belongs to the technical field of battery production, the battery cell detection equipment comprises a conveyor belt, a detection mechanism is mounted at the starting end of the conveyor belt, and the detection mechanism comprises a first mounting box and a second mounting box which are mounted at the front and rear parts of the starting end of the conveyor belt respectively; a lead screw is rotationally installed in the first installation box, a nut sliding block matched with the lead screw is connected to the exterior of the lead screw, a guide rod is fixedly installed in the second installation box, a guide block is slidably connected to the exterior of the guide rod, a supporting rod is jointly connected between the nut sliding block and the top of the guide block, and a transverse plate is slidably installed on the inner side of the supporting rod. A plurality of rotating discs are rotatably installed on the inner side of the transverse plate, a fixing plate is fixedly installed in the middle of the outer portion of each rotating disc, and the upper portion and the lower portion of each fixing plate are connected with testing clamp bodies with conducting strips through electric telescopic rods; the device can be applied to detection of columnar battery cells and square battery cells, and has a better detection effect.

Description

Technical Field

[0001] This invention belongs to the field of battery production technology, specifically a cell testing device and testing method for energy storage module production. Background Technology

[0002] As an energy storage device, an energy storage module is assembled from multiple battery cells during production. Before assembly, in order to avoid the battery cells having quality problems that affect the overall energy storage effect, it is necessary to use battery cell testing equipment to test each battery cell in sequence, such as testing the current, voltage, and capacitance of the battery cells, to determine whether the battery cells are normal, thereby avoiding the battery cells affecting the energy storage of the energy storage module after assembly.

[0003] When testing battery cells, there are many types of cells, the most common of which are cylindrical cells and prismatic cells. The electrode distribution of cylindrical cells and prismatic cells is different. When testing different types of cells, the testing equipment often needs to be set up with corresponding testing structures to make contact with the electrodes. Therefore, the same testing equipment is difficult to meet the testing needs of different types of cells. Summary of the Invention

[0004] This invention provides a battery cell testing device and method for energy storage module production, which can solve the technical problem that the same testing device in the prior art cannot meet the testing needs of different types of battery cells.

[0005] A cell testing device for energy storage module production includes a conveyor belt. A testing mechanism is installed at the starting end of the conveyor belt. The testing mechanism includes a first mounting box and a second mounting box, which are respectively installed at the front and rear of the starting end of the conveyor belt. A lead screw is rotatably installed inside the first mounting box, and a matching nut slider is connected to the outside of the lead screw. A guide rod is fixedly installed inside the second mounting box, and a guide block is slidably connected to the outside of the guide rod. A support rod is connected between the top of the nut slider and the top of the guide block. A horizontal plate is slidably installed inside the support rod. Several rotating disks are rotatably installed inside the horizontal plate, and a fixed plate is fixedly installed in the middle of the outside of the rotating disks. The upper and lower parts of the fixed plate are connected to test clamps with conductive plates through electric telescopic rods.

[0006] As a further technical solution of the present invention, the support rod is provided with sliding grooves on both sides, and the horizontal plate is provided with sliders that are slidably connected to the sliding grooves on both sides.

[0007] As a further technical solution of the present invention, a hydraulic cylinder is installed in the middle of the top of the support rod. The telescopic end of the hydraulic cylinder passes through the top of the support rod and is fixedly connected to the top surface of the horizontal plate. Two stabilizing rods are slidably connected through the top of the support rod. The bottom ends of the two stabilizing rods are fixedly connected to the top surface of the horizontal plate and are located on both sides of the hydraulic cylinder.

[0008] As a further technical solution of the present invention, the test clamp is L-shaped, the two test clamps are arranged symmetrically at the top and bottom, and the test clamps are equipped with wire connectors on the outside.

[0009] As a further technical solution of the present invention, a U-shaped mounting base is fixedly installed on the rear part of the horizontal plate, and a drive motor is installed on the outside of the mounting base. Each rotating disk is connected to a pulley at the end away from the fixed plate, and the pulleys are connected to each other by a linkage belt. The drive shaft of the drive motor is fixedly connected to one of the pulleys.

[0010] As a further technical solution of the present invention, an assembly platform is installed on the side of the conveyor belt near the detection mechanism, and a support frame for placing the detection instrument is installed on the top of the conveyor belt on the other side near the detection mechanism.

[0011] As a further technical solution of the present invention, the top of the assembly table is provided with an assembly mechanism, the assembly mechanism includes a stabilizing plate, and vertical plates are fixedly installed on both sides of the top of the stabilizing plate. An abutment plate is fixedly connected between the opposite surfaces of the two vertical plates. The vertical height of the abutment plate is less than the vertical height of the vertical plates. A translation groove is opened on the opposite surfaces of the two vertical plates. A connecting block is provided in each of the two translation grooves. A moving plate is connected between the two connecting blocks. Several limiting plates are equidistantly installed on the side of the moving plate facing the abutment plate. Several soft rubber pads are equidistantly installed on the side wall of the abutment plate facing the moving plate. An inner groove is opened in the vertical plate at the inner end of the translation groove. A spring is connected between the inner groove and the connecting block. The lateral length of the test clamp is greater than the initial distance between the moving plate and the abutment plate.

[0012] As a further technical solution of the present invention, the soft rubber pad and the limiting plate are on the same horizontal line, the outer end of the limiting plate is provided with a limiting arc groove, and an adhesive pad is connected to the outside of the limiting arc groove.

[0013] As a further technical solution of the present invention, the limiting arc groove is arranged in a three-quarter circle, and the lateral length of the moving plate is less than the distance between the two vertical plates.

[0014] A testing method for a battery cell testing device used in the production of energy storage modules, the testing method specifically includes the following steps: Step 1: First, place the testing instrument on top of the support frame and assemble the battery cell to be tested. After adjusting the height, the test clamp can be on the same axis as the limiting plate and the soft rubber pad. When the battery cell is cylindrical, first pull the moving plate outward to insert the battery cell into the inside of the limiting arc groove. Then release the moving plate, the spring returns to its original position, and the moving plate moves in the translation groove through the connecting block. The battery cell is attached to the surface of the soft rubber pad to fix the battery cell. Multiple limiting plates are used to fix multiple battery cells. Push the assembled assembly mechanism onto the conveyor belt for testing. Step Two: Connect the test clamps to the testing instrument using wires, leaving sufficient wire length. Adjust the height of the test clamps according to the height of the positive and negative terminals after the battery cell is assembled. First, increase the distance between the two test clamps using the electric telescopic rod. Then, drive the lead screw to rotate via an external motor, causing the nut slider to move outside and the support rod to move towards the moving plate. The guide block moves adaptively on the surface of the guide rod as the support rod moves. The two test clamps are on the same axis, located above and below the battery cell, respectively. Step 3: By retracting the electric telescopic rod, the two test clamps on the coaxial axis are brought closer together until the two conductive plates contact the positive and negative terminals of the battery cell respectively, and the battery cell is tested. According to the connected testing instrument, the current, voltage and capacitance of the battery cell are measured, and multiple battery cells can be tested. Step 4: After the test is completed, disconnect each test clamp from the electrode of the battery cell. Then, drive the test clamp from the battery cell using a lead screw and a hydraulic cylinder. Adjust the height of the horizontal plate and then transport the battery cell to the next station via a conveyor belt.

[0015] The beneficial effects of the present invention are as follows: The present invention, by setting up an assembly mechanism, can realize the limiting operation of cylindrical battery cells by using a limiting arc groove. The adhesive pad on the outside of the limiting arc groove has a flat end. After the moving plate is pulled open, the spring's restoring force, together with the connecting block, moves in the translation groove, which allows the limiting plate to fix the cylindrical or square battery cell with the soft rubber pad. It is applicable to the limiting and fixing operation of different battery cells and facilitates the subsequent testing process. By connecting the rotating disk to the test clamp, the test clamp can adjust the spacing via an electric telescopic rod to accommodate the positive and negative terminals of cylindrical cells. After the rotating disk rotates, the test clamp can be adjusted to a vertical position, making it suitable for testing square cells as well, thus meeting the testing needs of different cell types. Furthermore, a screw-driven support rod movement method is set up to facilitate the alignment between the test clamp and the battery cell, avoiding the inconvenience and large errors that can occur when aligning directly via conveyor belt. By adjusting the position of the test clamp to match the fixed position of the battery cell, the contact effect between the test clamp and the battery cell motor is effectively improved. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural diagram of the detection mechanism of the present invention; Figure 3 This is the present invention. Figure 2 Enlarged view of area A in the middle; Figure 4This is a rear view of the horizontal plate in this invention; Figure 5 This is a structural diagram of the assembly mechanism in this invention; Figure 6 This is a top view of the limiting plate in this invention; Figure 7 This is a cross-sectional view of the vertical plate in this invention.

[0018] In the diagram: 1. Conveyor belt; 2. Testing mechanism; 201. Mounting box one; 202. Mounting box two; 203. Lead screw; 204. Nut slider; 205. Guide rod; 206. Guide block; 207. Support rod; 208. Horizontal plate; 209. Slide groove; 210. Hydraulic cylinder; 211. Stabilizer bar; 212. Rotary disc; 213. Fixing plate; 214. Electric telescopic rod; 215. Test clamp; 216. Guide... 217. Electric sheet; 218. Mounting base; 219. Drive motor; 220. Pulley; 221. Linkage belt; 3. Support frame; 4. Assembly table; 5. Assembly mechanism; 501. Stabilizing plate; 502. Vertical plate; 503. Abutment plate; 504. Moving plate; 505. Limiting plate; 506. Translation groove; 507. Inner groove; 508. Spring; 509. Connecting block; 510. Limiting arc groove; 511. Adhesive pad. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-7 As shown, a battery cell testing device for energy storage module production includes a conveyor belt 1. A testing mechanism 2 is installed at the starting end of the conveyor belt 1. The testing mechanism 2 includes a first mounting box 201 and a second mounting box 202 respectively installed at the front and rear of the starting end of the conveyor belt 1. A lead screw 203 is rotatably installed inside the first mounting box 201, and a nut slider 204 adapted to the lead screw 203 is connected to its exterior. A guide rod 205 is fixedly installed inside the second mounting box 202, and a guide block 206 is slidably connected to the exterior of the guide rod 205. A support rod 207 is connected between the top of the nut slider 204 and the top of the guide block 206. A horizontal plate 208 is slidably installed inside the support rod 207. Several rotating disks 212 are rotatably installed inside the horizontal plate 208, and a fixed plate 213 is fixedly installed in the middle of the exterior of the rotating disks 212. The upper and lower parts of the fixed plate 213 are connected to test clamps 215 with conductive plates 216 through electric telescopic rods 214.

[0021] The support rod 207 has grooves 209 on both sides, and the horizontal plate 208 has sliders that are slidably connected to the grooves 209 on both sides. A hydraulic cylinder 210 is installed in the middle of the top of the support rod 207. The telescopic end of the hydraulic cylinder 210 passes through the top of the support rod 207 and is fixedly connected to the top surface of the horizontal plate 208. Two stabilizing rods 211 are slidably connected through the top of the support rod 207. The bottom ends of the two stabilizing rods 211 are fixedly connected to the top surface of the horizontal plate 208 and are located on both sides of the hydraulic cylinder 210.

[0022] Specifically, the horizontal plate 208 is driven to move downward by the hydraulic cylinder 210, thereby adjusting the height of the horizontal plate 208 so that the test clamp 215 can be adapted to the positive and negative positions of the battery cell. The lead screw 203 drives the support rod 207 to move and move the test clamp 215 closer to the battery cell, avoiding the error caused by driving the battery cell closer to the test clamp 215 by the conveyor belt 1, making the test more accurate.

[0023] The test clamp 215 is L-shaped, with two test clamps 215 arranged symmetrically at the top and bottom, and wire connectors are installed on the outside of the test clamp 215.

[0024] The wire connector facilitates the connection between the test clamp 215 and the test instrument, thereby facilitating the collection of test data.

[0025] A U-shaped mounting base 217 is fixedly installed at the rear of the horizontal plate 208. A drive motor 218 is installed on the outside of the mounting base 217. Each rotating disk 212 is connected to a pulley 219 at the end away from the fixed plate 213. The pulleys 219 are connected to each other by a linkage belt 220. The drive shaft of the drive motor 218 is fixedly connected to one of the pulleys 219.

[0026] Specifically, the drive motor 218 drives one of the pulleys 219 to rotate, which in turn drives the rotating disk 212 to rotate. Under the drive of the linkage belt 220, multiple rotating disks 212 rotate synchronously, thereby adjusting the test clamp 215 from a vertical position to a horizontal position, so that the square battery cell can be tested.

[0027] An assembly platform 4 is installed on one side of the conveyor belt 1 near the testing mechanism 2, and a support frame 3 for placing testing instruments is installed on the top of the conveyor belt 1 on the other side near the testing mechanism 2. An assembly mechanism 5 is provided on the top of the assembly platform 4. The assembly mechanism 5 includes a stabilizing plate 501, and vertical plates 502 are fixedly installed on both sides of the top of the stabilizing plate 501. An abutment plate 503 is fixedly connected between the opposing surfaces of the two vertical plates 502. The vertical height of the abutment plate 503 is less than the vertical height of the vertical plates 502. A translation groove 506 is provided on the opposing surfaces of the two vertical plates 502. A connecting block 509 is provided in each of the two translation grooves 506. A moving plate 504 is connected between the two connecting blocks 509, and the moving plate 504 faces the abutment plate 503. Several limiting plates 505 are equidistantly installed on the side, and several soft rubber pads are equidistantly installed on the side wall of the abutment plate 503 facing the moving plate 504. An inner groove 507 is opened in the vertical plate 502 at the inner end of the translation groove 506. A spring 508 is connected between the inner groove 507 and the connecting block 509. The lateral length of the test clamp 215 is greater than the initial distance between the moving plate 504 and the abutment plate 503. The soft rubber pads and the limiting plates 505 are on the same horizontal line. A limiting arc groove 510 is opened at the outer end of the limiting plate 505, and an adhesive pad 511 is connected to the outside of the limiting arc groove 510. The limiting arc groove 510 is set in a three-quarter circle. The lateral length of the moving plate 504 is less than the distance between the two vertical plates 502.

[0028] Specifically, by setting a spring 508 to connect the connecting block 509, the distance between the moving plate 504 and the abutment plate 503 increases when the moving plate 504 is pulled open. At this time, the spring 508 is stretched. After the battery cell is inserted into the limiting arc groove 510, the restoring force of the spring 508 can be used to fix the battery cell between the moving plate 504 and the abutment plate 503, which facilitates the testing operation of the battery cell.

[0029] A testing method for a battery cell testing device used in the production of energy storage modules, the testing method specifically includes the following steps: Step 1: First, place the testing instrument on top of the support frame 3 and assemble the battery cell to be tested. After adjusting the height, the test clamp 215 can be on the same axis as the limiting plate 505 and the soft rubber pad. When the battery cell is cylindrical, first pull the moving plate 504 outward to insert the battery cell into the limiting arc groove 510. Then, release the moving plate 504, the spring 508 returns to its original position, and the moving plate 504 moves in the translation groove 506 through the connecting block 509. The battery cell is attached to the surface of the soft rubber pad and fixed. Multiple limiting plates 505 are used to fix multiple battery cells. Push the assembled assembly mechanism 5 onto the conveyor belt 1 for testing. The conveyor belt 1 remains stationary at this time. Step Two: Connect the test clamp 215 to the testing instrument via a wire, leaving sufficient length for the wire. Adjust the height of the test clamp 215 according to the height of the positive and negative terminals after the battery cell is assembled. First, increase the distance between the two test clamps 215 using the electric telescopic rod 214. Then, drive the lead screw 203 to rotate via an external motor, causing the nut slider 204 to move outside of it, which in turn moves the support rod 207 towards the moving plate 504. The guide block 206 moves adaptively on the surface of the guide rod 205 as the support rod 207 moves. The two test clamps 215 are on the same axis, located above and below the battery cell, respectively. Step 3: The electric telescopic rod 214 is retracted, which drives the two test clamps 215 on the coaxial axis to come closer together until the two conductive plates 216 contact the positive and negative terminals of the battery cell respectively, and the battery cell is tested. According to the connected testing instrument, the current, voltage and capacitance of the battery cell are measured, and multiple battery cells can be tested. Step 4: After the test is completed, each test clamp 215 is disconnected from the electrode of the battery cell. Then, driven by the lead screw 203 and the hydraulic cylinder 210, the test clamp 215 is disconnected from the battery cell. The height of the horizontal plate 208 is adjusted, and then the battery cell is conveyed to the next station by the conveyor belt 1.

[0030] It should be further explained that the present invention can also be applied to the testing of square battery cells. When testing a square battery cell, after the moving plate 504 is pulled open, the horizontal end of the adhesive pad 511 bonded to the limiting arc groove 510 abuts against the outside of the square battery cell. As the moving plate 504 is reset, the adhesive pad 511, together with the soft rubber pad, clamps the square battery cell. The drive motor 218 drives one of the pulleys 219 to rotate, thereby driving the rotating disk 212 to rotate. Under the drive of the linkage belt 220, multiple rotating disks 212 rotate synchronously, thereby adjusting the test clamp 215 from a vertical to a horizontal state. Then, the distance between the two test clamps 215 is adjusted by the electric telescopic rod 214, so that the conductive sheet 216 contacts the two electrodes located on the upper part of the square battery cell, thereby allowing the square battery cell to be tested.

[0031] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A cell testing device for energy storage module production, comprising a conveyor belt (1), characterized in that, A detection mechanism (2) is installed at the starting end of the conveyor belt (1). The detection mechanism (2) includes a first installation box (201) and a second installation box (202) installed at the front and rear ends of the starting end of the conveyor belt (1), respectively. A lead screw (203) is rotatably installed inside the first installation box (201), and a nut slider (204) that matches the lead screw (203) is connected to the outside of the lead screw (203). A guide rod (205) is fixedly installed inside the second installation box (202), and a guide block (204) is slidably connected to the outside of the guide rod (205). 6) A support rod (207) is connected between the top of the nut slider (204) and the guide block (206), and a horizontal plate (208) is slidably installed on the inner side of the support rod (207). Several rotating disks (212) are rotatably installed on the inner side of the horizontal plate (208), and a fixed plate (213) is fixedly installed in the middle of the outer side of the rotating disk (212). The upper and lower parts of the fixed plate (213) are connected to a test clamp (215) with a conductive sheet (216) through an electric telescopic rod (214).

2. The cell testing equipment for energy storage module production according to claim 1, characterized in that, The support rod (207) has grooves (209) on both sides, and the horizontal plate (208) has sliders that are slidably connected to the grooves (209) on both sides.

3. The cell testing equipment for energy storage module production according to claim 2, characterized in that, A hydraulic cylinder (210) is installed at the top center of the support rod (207). The telescopic end of the hydraulic cylinder (210) passes through the top of the support rod (207) and is fixedly connected to the top surface of the horizontal plate (208). Two stabilizing rods (211) are slidably connected through the top of the support rod (207). The bottom ends of the two stabilizing rods (211) are fixedly connected to the top surface of the horizontal plate (208) and are located on both sides of the hydraulic cylinder (210).

4. The cell testing equipment for energy storage module production according to claim 3, characterized in that, The test clamp (215) is L-shaped, with two test clamps (215) arranged symmetrically above and below each other, and wire connectors are installed on the outside of the test clamp (215).

5. The cell testing equipment for energy storage module production according to claim 4, characterized in that, A U-shaped mounting base (217) is fixedly installed on the rear of the horizontal plate (208). A drive motor (218) is installed on the outside of the mounting base (217). Each rotating disk (212) is connected to a pulley (219) at the end away from the fixed plate (213). The pulleys (219) are connected to each other by a linkage belt (220). The drive shaft of the drive motor (218) is fixedly connected to one of the pulleys (219).

6. The cell testing equipment for energy storage module production according to claim 1, characterized in that, An assembly table (4) is installed on one side of the conveyor belt (1) near the testing mechanism (2), and a support frame (3) for placing testing instruments is installed on the other side of the top of the conveyor belt (1) near the testing mechanism (2).

7. The cell testing equipment for energy storage module production according to claim 4, characterized in that, The top of the assembly table (4) is provided with an assembly mechanism (5). The assembly mechanism (5) includes a stabilizing plate (501), and vertical plates (502) are fixedly installed on both sides of the top of the stabilizing plate (501). An abutment plate (503) is fixedly connected between the opposite surfaces of the two vertical plates (502). The vertical height of the abutment plate (503) is less than the vertical height of the vertical plates (502). A translation groove (506) is opened on the opposite surfaces of the two vertical plates (502). A connecting block (509) is provided in each of the two translation grooves (506). The two connecting blocks (509) are connected together. A movable plate (504) is connected. Several limiting plates (505) are installed at equal intervals on the side of the movable plate (504) facing the abutment plate (503). Several soft rubber pads are installed at equal intervals on the side wall of the abutment plate (503) facing the movable plate (504). An inner groove (507) is opened in the vertical plate (502) at the inner end of the translation groove (506). A spring (508) is connected between the inner groove (507) and the connecting block (509). The lateral length of the test clamp (215) is greater than the initial distance between the movable plate (504) and the abutment plate (503).

8. The cell testing equipment for energy storage module production according to claim 7, characterized in that, The soft rubber pad and the limiting plate (505) are on the same horizontal line. The outer end of the limiting plate (505) is provided with a limiting arc groove (510), and an adhesive pad (511) is connected to the outside of the limiting arc groove (510).

9. The cell testing equipment for energy storage module production according to claim 8, characterized in that, The limiting arc groove (510) is arranged in a three-quarter circle, and the lateral length of the moving plate (504) is less than the distance between the two vertical plates (502).

10. A testing method for a cell testing device for energy storage module production according to any one of claims 1-9, characterized in that, The detection method specifically includes the following steps: Step 1: First, place the testing instrument on the top of the support frame (3) and assemble the battery cell to be tested. After adjusting the height, the test clamp (215) can be on the same axis as the limiting plate (505) and the soft rubber pad. When the battery cell is cylindrical, first pull the moving plate (504) outward and insert the battery cell into the limiting arc groove (510). Then release the moving plate (504), the spring (508) resets, and drives the moving plate (504) to move in the translation groove (506) through the connecting block (509). The battery cell is attached to the surface of the soft rubber pad and the battery cell is fixed. Multiple limiting plates (505) are used to achieve the fixing operation of multiple battery cells. Push the assembled assembly mechanism (5) to the conveyor belt (1) for testing. Step 2: Connect the test clamp (215) to the testing instrument via a wire, leaving a length for the wire. Adjust the height of the test clamp (215) according to the height of the positive and negative poles after the battery cell is assembled. First, increase the distance between the two test clamps (215) using the electric telescopic rod (214). Then, drive the lead screw (203) to rotate via an external motor, causing the nut slider (204) to move outside of it, which in turn causes the support rod (207) to move towards the moving plate (504). The guide block (206) moves adaptively on the surface of the guide rod (205) as the support rod (207) moves. The two test clamps (215) are on the same axis, located above and below the battery cell, respectively. Step 3: By retracting the electric telescopic rod (214), the two test clamps (215) on the coaxial axis are brought closer together until the two conductive plates (216) contact the positive and negative terminals of the battery cell respectively, and the battery cell is tested. According to the connected testing instrument, the current, voltage and capacitance of the battery cell are measured to realize the testing of multiple battery cells. Step 4: After the test is completed, each test clamp (215) is disconnected from the electrode of the battery cell. Then, the test clamp (215) is disconnected from the battery cell by the lead screw (203) and the hydraulic cylinder (210). The height of the horizontal plate (208) is adjusted, and then the battery cell is conveyed to the next station by the conveyor belt (1).

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