A cylindrical battery cell OCV testing device and cylindrical battery cell OCV testing equipment

Abstract

This utility model discloses an OVC testing device and equipment for cylindrical battery cells. The testing device includes a testing unit and a transmission unit. The transmission unit transports a circular carrier containing cylindrical battery cells to the testing station, where the testing unit performs OVC testing on the circular battery cells. The transmission unit includes a conveyor line and a spacing mechanism. The spacing mechanism includes a drive shaft, a first baffle, and a first drive unit. A material passage for the circular carrier is formed between the drive shaft and the first baffle. The first drive unit drives the drive shaft to rotate around its central axis. A spirally arranged groove is provided on the outer peripheral wall of the drive shaft, and the groove abuts against the outer peripheral wall of the cylindrical carrier. Because the spacing of the spirally arranged grooves on the drive shaft is consistent, the spacing between the circular carriers transported to the testing station by the drive shaft can be ensured to be precise. The testing equipment disclosed in this application not only realizes the automatic arrangement of multiple cylindrical battery cells to be tested but also realizes the automatic and precise transmission of cylindrical battery cells.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a cylindrical cell OCV testing device and testing equipment. Background Technology

[0002] Open-circuit voltage (OCV) is a key parameter for testing the static voltage of a battery under no-load conditions. It is primarily used to evaluate the battery's state of charge (SOC), state of health (SOH), and performance consistency. In actual production, cylindrical cells A are transferred between various stages of the assembly line using circular carriers B (such as...). Figure 1 As shown in the diagram, the circular carrier B has a receiving cavity, and the cylindrical battery cell A stands upright inside the receiving cavity. In the OCV testing process, multiple cylindrical batteries are typically tested simultaneously, making it crucial to arrange them neatly. The circular carriers flow into the OCV testing process from the previous process, and the distance between the carriers is not fixed, requiring the cylindrical batteries to be organized. Furthermore, the cylindrical battery production line operates at a relatively fast cycle time, and the conveyor speed is also relatively high. If the conveyor suddenly stops, the cylindrical batteries will tip over due to inertia, causing the production line to stop and affecting production efficiency. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a testing device that can automatically adjust the spacing of cylindrical battery cells for sorting without stopping the conveyor line.

[0004] To solve the above technical problems, this utility model provides a cylindrical battery cell OVC testing device, including a testing unit and a transmission unit. The transmission unit transports a circular carrier carrying a cylindrical battery cell to the testing station, and the testing unit performs OVC testing on the circular battery cell. The transmission unit includes a conveyor line and a spacing mechanism. The conveyor line includes a first conveyor section and a second conveyor section. A support plate is provided between the first and second conveyor sections corresponding to the test station. A circular carrier is first transferred from the first conveyor section to the support plate and then transferred to the second conveyor section. The spacing mechanism includes a drive shaft, a first baffle, and a first drive unit. The drive shaft and the first baffle are located above the conveyor line, forming a material passage for the circular carrier. The first drive unit drives the drive shaft to rotate around its central axis. A spiral groove is provided on the outer peripheral wall of the drive shaft, and the groove abuts against the outer peripheral wall of the cylindrical carrier. The testing unit includes an OCV testing instrument and a testing docking part. The testing docking part is located above the support plate. The circular carrier is transferred onto the support plate, and the testing docking part moves downward to achieve a testing connection with the cylindrical battery cell.

[0005] In one embodiment of the present invention, the first drive unit includes a motor and a belt drive assembly, wherein the driven pulley of the belt drive assembly is connected to one end of the drive shaft, and the driving pulley is connected to the output shaft of the motor.

[0006] In one embodiment of this utility model, the conveyor line is a flexible conveyor chain plate line, which includes a first conveyor section, a second conveyor section and a curved section. The curved section is connected between the first conveyor section and the second conveyor section. The material feeding channel forms a conveying blank area corresponding to the curved section, and the bearing plate is disposed in the conveying blank area.

[0007] In one embodiment of this utility model, the test docking part includes a second driving part, a carrier plate and a test element. The test element is electrically connected to the OCV test instrument and is mounted on the carrier plate. The second driving part drives the carrier plate to move up and down.

[0008] In one embodiment of this utility model, the second driving part is a first cylinder, and the telescopic rod of the first cylinder is fixedly connected to the carrier plate.

[0009] In one embodiment of the present invention, a material blocking mechanism is provided at the entrance of the material conveying channel corresponding to the first conveying section; the material blocking mechanism includes a second cylinder and a second baffle, the second cylinder driving the second baffle to move towards or away from the entrance.

[0010] In one embodiment of this utility model, a diversion mechanism is provided at the outlet of the material feeding channel corresponding to the second conveying section; the diversion mechanism includes a third cylinder and a push plate; an NG flow line is provided on the side of the second conveying section, and the third cylinder drives the push plate to move towards or away from the NG flow line.

[0011] In one embodiment of this utility model, a limiting plate is provided on the NG flow line, and a hinge seat and a fourth cylinder are provided on the base of the NG flow line relative to the second conveying section. The limiting plate is connected to the hinge seat, and the fourth cylinder drives the limiting plate to rotate in a direction closer to or farther away from the second conveying section.

[0012] To solve the above-mentioned technical problems, this utility model also provides a cylindrical cell OCV testing device, including a frame housing and two sets of testing devices. The frame housing is provided with a platform and a crossbeam. The transmission unit is disposed on the platform, the crossbeam is disposed above the platform, and the testing docking part is installed on the crossbeam.

[0013] In one embodiment of this utility model, a barcode scanner for scanning the QR code on the circular carrier is provided on the frame housing corresponding to the test station.

[0014] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects: When the circular carrier on the conveyor line enters the material feeding channel, a portion of the circular carrier is located in the groove of the drive shaft. One side of its outer peripheral wall abuts against the inner wall of the groove, and the other side abuts against the first baffle. As the drive shaft rotates, the circular carrier is pushed by the drive shaft to gradually move to the testing station. Since the spacing of the spiral grooves on the drive shaft is consistent, the spacing between the circular carriers transported to the testing station by the drive shaft can be ensured to be precise. This not only realizes the automatic arrangement of multiple cylindrical cells to be tested, but also realizes the automatic and precise transfer of cylindrical cells.

[0015] In addition, the conveyor line does not pass through the testing station, so the conveyor line does not need to be stopped during the OCV test, and the cylindrical cells on the conveyor line will not tip over. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. Figure 1 This is a schematic diagram of a circular carrier and a cylindrical battery cell; Figure 2 A schematic diagram of the OCV testing equipment; Figure 3 A partial schematic diagram of the OCV testing equipment (with the casing removed); Figure 4 and Figure 5 This is a schematic diagram of the transmission unit; Figure 6 This is a schematic diagram of the test docking section; Figure 7 A schematic diagram of the transmission unit (from another angle); Figure 8 This is a schematic diagram of the diversion mechanism.

[0017] Explanation of reference numerals in the accompanying drawings: 100, Frame housing; 101, Feed inlet; 102, Discharge outlet; 200, Testing unit; 300, Transmission unit; 103, Platform; 104, Crossbeam; 301, First conveying section; 302, Second conveying section; 303, Bearing plate; 304, Drive shaft; 305, First baffle; 307, Material feeding channel; 3041, Groove; 105, Support base; 308, Motor; 309, Belt drive assembly; 201, OCV testing instrument; 202, Testing docking part; 2021, Second drive part; 2022, Carrier plate; 2023, Testing element; 310, Bending section; 311, Diverting mechanism; 3111, Third cylinder; 3112, Push plate; 3113, Limiting plate; 3114, Hinge seat; 3115, Fourth cylinder. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0019] Figure 2 The image shows an OCV testing device for cylindrical battery cells, which includes a frame housing 100. The frame housing has an inlet 101 and an outlet 102. A circular carrier containing cylindrical battery cells enters the device through the inlet and exits through the outlet. The testing device is equipped with testing devices. Generally, to improve testing and production efficiency, multiple sets of testing devices are provided. This embodiment has two sets (e.g., ...). Figure 3 (As shown). The testing device includes a testing unit 200 and a transmission unit 300. The transmission unit transports a circular carrier carrying cylindrical battery cells to the testing station, where the testing unit performs OVC testing on the circular battery cells. A platform 103 and a crossbeam 104 are provided inside the frame housing. The transmission unit is positioned on the platform, and the crossbeam is positioned above the platform. The testing docking part of the testing unit is mounted on the crossbeam.

[0020] like Figure 4As shown, the transmission unit 300 includes a conveyor line and a spacing mechanism. The conveyor line connects the inlet and outlet, and includes a first conveyor section 301 and a second conveyor section 302. A support plate 303 is provided at the corresponding test station between the first and second conveyor sections. The first conveyor section corresponds to the inlet, and the second conveyor section corresponds to the outlet. The circular carrier is first transferred from the first conveyor section to the support plate, and then transferred to the second conveyor section. The spacing mechanism includes a drive shaft 304, a first baffle 305, and a first drive unit. The drive shaft and the first baffle are located above the conveyor line, forming a material passage 307 between the drive shaft and the first baffle to allow the circular carrier to pass through. A spiral groove 3041 is provided on the outer peripheral wall of the drive shaft. When the circular carrier enters the material passage, the groove abuts against the outer peripheral wall of the cylindrical carrier under the limiting action of the first baffle. The first drive unit drives the drive shaft to rotate around its central axis. The rotation of the drive shaft generates axial thrust, causing the circular carrier to move forward in the material passage.

[0021] Two support seats 105 are provided on the platform, and the two ends of the drive shaft 304 are respectively connected to the bearings in the support seats. The first drive unit includes a motor 308 and a belt drive assembly 309. The driven pulley of the belt drive assembly is connected to one end of the drive shaft, and the driving pulley is connected to the output shaft of the motor.

[0022] In this embodiment, the testing device completes the testing of four cylindrical cells at once, such as... Figure 5 As shown, four circular carriers B are located in four adjacent grooves 3041 on the drive shaft. When the circular carriers reach the test station, the drive shaft stops rotating, and the four circular carriers are conveyed into position. The test unit then tests the four cylindrical cells. After the test is completed, the first drive unit drives the drive shaft to rotate, and the circular carriers move forward to the second conveying section 302, whereby the unloading operation can be completed.

[0023] The groove width on the drive shaft is adapted to the circular carrier, and the spacing between adjacent grooves is set according to the distance of the test head. Since the spacing of the spiral grooves on the drive shaft is consistent, the spacing between the circular carriers transported by the drive shaft to the test station can be ensured to be precise. This not only realizes the automatic arrangement of multiple cylindrical cells to be tested, but also the automatic and precise transfer of cylindrical cells.

[0024] like Figure 3 As shown, the test unit 200 includes an OCV testing instrument 201 and a test docking part 202. The test docking part is located above the support plate. A circular carrier is transferred onto the support plate, and the test docking part moves downward to achieve a test connection with the cylindrical battery cell. See also Figure 6The test docking unit includes a second drive unit 2021, a carrier plate 2022, and a test element 2023. The test element is electrically connected to the OCV testing instrument and is mounted on the carrier plate. The second drive unit drives the carrier plate to rise and fall. Preferably, the second drive unit is a first cylinder, and the extension rod of the first cylinder is fixedly connected to the carrier plate. In other embodiments, the second drive unit can also be a motor, as long as it can achieve the raising and lowering of the carrier plate.

[0025] The rack housing is equipped with a barcode scanner at the corresponding test station for scanning QR codes on the circular carrier. Before OCV testing, the barcode scanner scans the QR code on the circular carrier to read the current cell information, so that the test results can be matched with the cell in the system. The circular carrier has eight QR codes that are already bound to the QR codes on the cells. The barcode scanner in the fixed position only needs to scan one of the QR codes.

[0026] Cylindrical cells need to remain stationary during testing. In this embodiment, a support plate is used at the corresponding testing station, and the conveyor line does not pass through the testing station. Therefore, the conveyor line does not need to stop during testing. In this embodiment, a flexible conveyor chain line (such as...) is used. Figure 7 As shown, it includes a first conveying section 301, a second conveying section 302, and a curved section 310. The curved section connects the first and second conveying sections, and a conveying blank area is formed at the location of the curved section in the material feeding channel. The support plate is set in the conveying blank area, thus allowing the conveyor line to avoid the test station. The conveyor line does not pass through the test station, so the conveyor line does not need to be stopped during OCV testing, and the cylindrical cells on the conveyor line will not tip over. In some embodiments, the first conveyor section and the second conveyor section can be configured as two independently driven lines, which allows the use of ordinary belt conveyors and reduces costs.

[0027] A blocking mechanism (not shown in the figure) is installed at the entrance of the material conveying channel in the first conveying section. The blocking mechanism includes a second cylinder and a second baffle. A photoelectric sensor is installed at the entrance. When the photoelectric signal of the photoelectric sensor is cut off four times by the cylindrical battery cell, the second cylinder drives the second baffle to move and close the entrance, preventing the subsequent carrier from entering the material conveying channel. Alternatively, the time between the next cylindrical battery cell calculation can be set according to the test duration. This allows for the current test to proceed smoothly while another set of cylindrical batteries is in the material conveying channel.

[0028] See Figure 8A diversion mechanism 311 is installed at the outlet of the material feeding channel corresponding to the second conveying section. The function of this diversion mechanism is to convey the tested OK cells to the next process and reject the tested NG cells into the NG flow line next to the second conveying section. The diversion mechanism includes a third cylinder 3111 and a push plate 3112. When a battery cell determined to be NG is detected by the photoelectric sensor, the third cylinder drives the push plate to extend and push the battery cell into the NG flow line.

[0029] This embodiment uses a side-push method to remove NG (Not Good) cells. There is no obstruction between the NG flow line and the second conveyor section, and the height of the NG flow line is lower than that of the second conveyor line. To prevent the tested and OK cells from tipping over and falling into the NG flow line, this embodiment sets a limit plate 3113 on the NG flow line. A hinge seat 3114 and a fourth cylinder 3115 are set on the base of the NG flow line relative to the second conveyor section. The limit plate is connected to the hinge seat, and the fourth cylinder drives the limit plate to rotate towards the second conveyor section. The limit plate is tilted on the NG flow line, which can prevent the tested and OK cells from accidentally entering the NG flow line.

[0030] In some embodiments, a fourth cylinder is not required. A torsion spring is provided in the hinge seat. The limiting plate remains tilted on the NG flow line in the normal state. When it is necessary to remove the NG cell, the third push plate pushes the cell to rotate the limiting plate to be parallel to the base of the NG flow line.

[0031] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A cylindrical battery cell OVC testing device, comprising a testing unit and a transmission unit, wherein the transmission unit transports a circular carrier carrying a cylindrical battery cell to a testing station, and the testing unit performs OVC testing on the cylindrical battery cell; characterized in that, The transmission unit includes a conveyor line and a spacing mechanism. The conveyor line includes a first conveyor section and a second conveyor section. A support plate is provided between the first and second conveyor sections corresponding to the test station. A circular carrier is first transferred from the first conveyor section to the support plate and then transferred to the second conveyor section. The spacing mechanism includes a drive shaft, a first baffle, and a first drive unit. The drive shaft and the first baffle are located above the conveyor line, forming a material passage for the circular carrier. The first drive unit drives the drive shaft to rotate around its central axis. A spiral groove is provided on the outer peripheral wall of the drive shaft, and the groove abuts against the outer peripheral wall of the cylindrical carrier. The testing unit includes an OCV testing instrument and a testing docking part. The testing docking part is located above the support plate. The circular carrier is transferred onto the support plate, and the testing docking part moves downward to achieve a testing connection with the cylindrical battery cell.

2. The cylindrical cell OCV test device of claim 1, wherein, The first drive unit includes a motor and a belt drive assembly. The driven pulley of the belt drive assembly is connected to one end of the drive shaft, and the driving pulley is connected to the output shaft of the motor.

3. The cylindrical cell OCV test device of claim 1, wherein, The conveyor line is a flexible conveyor chain line, which includes a first conveyor section, a second conveyor section and a curved section. The curved section is connected between the first conveyor section and the second conveyor section. The material feeding channel forms a conveying blank area corresponding to the curved section, and the bearing plate is disposed in the conveying blank area.

4. The cylindrical cell OCV test device of claim 1, wherein, The test docking part includes a second drive unit, a carrier plate, and a test element. The test element is electrically connected to the OCV test instrument and is mounted on the carrier plate. The second drive unit drives the carrier plate to move up and down.

5. The cylindrical cell OCV test device of claim 4, wherein, The second drive unit is a first cylinder, and the extension rod of the first cylinder is fixedly connected to the carrier plate.

6. The cylindrical cell OCV test device of claim 1, wherein, The first conveying section is provided with a material blocking mechanism at the entrance of the material conveying channel; the material blocking mechanism includes a second cylinder and a second baffle, and the second cylinder drives the second baffle to move towards or away from the entrance.

7. The cylindrical cell OCV test device of claim 1, wherein, The second conveying section is provided with a diversion mechanism at the outlet of the material feeding channel; the diversion mechanism includes a third cylinder and a push plate; an NG flow line is provided on the side of the second conveying section, and the third cylinder drives the push plate to move towards or away from the NG flow line.

8. The cylindrical cell OCV test device of claim 7, wherein, A limiting plate is provided on the NG flow line. A hinge seat and a fourth cylinder are provided on the base of the NG flow line relative to the second conveying section. The limiting plate is connected to the hinge seat. The fourth cylinder drives the limiting plate to rotate in a direction closer to or farther away from the second conveying section.

9. A cylindrical cell OCV test apparatus, characterized by, The cylindrical battery cell OCV testing device comprises a rack shell, a loading table and a crossbeam, and a testing docking part.

10. The cylindrical cell OCV test apparatus of claim 9, wherein, A code scanning gun is arranged on the rack shell corresponding to the testing station for scanning the two-dimensional code on the circular carrier.

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