Flexible and compatible on-line automatic test equipment for multiple battery cells

Abstract

The utility model relates to a flexible compatible multi-cell online automatic test device, which relates to the technical field of test devices and comprises a test platform, and a cell conveying plate chain, a cell OCV test channel, a cell thickness test channel and a cell offline cache channel are sequentially arranged on the test platform. And the three groups of battery cell grabbing and transplanting mechanisms are distributed above a path between the battery cell conveying plate chain and the battery cell OCV test channel, a path between the battery cell OCV test channel and the battery cell thickness test channel, and a path between the battery cell thickness test channel and the battery cell off-line cache channel. According to the utility model, the test probe of the OCV test unit can be automatically adjusted according to different positions of battery cell poles, different thicknesses of battery cells and different heights of the battery cells. The device is reasonable in layout, compact in structure, practical, convenient, economical and practical, reduces the manual participation degree, improves the automation degree of OCV test equipment, improves the personnel efficiency, and is suitable for compatibility tests of battery cells of various specifications.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a fully automated testing equipment that is flexible and compatible with multiple battery cells. Background Technology

[0002] With the advancement of technology, new energy vehicles have become a new direction for the global automotive industry. They represent not only the future of the automotive industry but also a strategic choice shared by various countries and major automakers. Against this backdrop, lithium batteries, as the core power source for new energy vehicles, require particularly stringent quality control, serving as a key factor in ensuring the gradual replacement of traditional gasoline-powered vehicles. During lithium battery production, rigorous monitoring of various performance indicators relies on feedback from precision testing equipment. OCV (Open Circuit Capacitor) testing equipment is such a sophisticated testing tool, collecting and providing feedback on comprehensive data from the battery cells. On the battery module production line, it measures the open-circuit voltage and internal resistance of the cells, using this data to analyze battery performance and determine whether it meets established performance standards.

[0003] On battery module production lines, it's necessary to accommodate products of various specifications. The cell loading station, as the starting point of the production process, needs to handle various types of cells from the workshop, differing in size and terminal spacing. Traditional OCV testing equipment typically can only test a single type of cell. When faced with different types of cells, manual adjustment of the test probe assembly is often required to accommodate different battery specifications. However, this manual adjustment method is inefficient and lacks precision, failing to meet the demands of modern production efficiency and accuracy. Utility Model Content

[0004] The purpose of this invention is to provide an OCV testing device that is applicable to compatibility testing of different battery cells.

[0005] To achieve the above objectives, the present invention provides a flexible and compatible automated testing device for multiple battery cells, including a testing platform. The testing platform is sequentially equipped with a battery cell conveyor chain, a battery cell OCV testing channel, a battery cell thickness testing channel, and a battery cell unloading buffer channel. The testing platform also includes a column gantry frame with three sets of movable battery cell gripping and transplanting mechanisms. These three sets of mechanisms are distributed above the paths between the battery cell conveyor chain and the battery cell OCV testing channel, between the battery cell OCV testing channel and the battery cell thickness testing channel, and between the battery cell thickness testing channel and the battery cell unloading buffer channel.

[0006] Preferably, the first cell gripping and transfer mechanism moves the lithium battery to the cell OCV test channel for OCV testing, the second cell gripping and transfer mechanism moves the tested lithium battery to the cell thickness test channel for thickness testing, and the third cell gripping and transfer mechanism moves the tested lithium battery to the cell offline buffer channel to complete the unloading of the lithium battery.

[0007] Preferably, the battery cell gripping and transplanting mechanism includes a moving mechanism connected to the column gantry, a lifting mechanism located at the bottom of the moving mechanism, an automatic pitch-changing mechanism located at the bottom of the lifting mechanism, and a battery cell gripping claw located at the bottom of the automatic pitch-changing mechanism.

[0008] Preferably, a lifting tank chain is connected between the automatic pitch-changing mechanism and the battery cell gripper.

[0009] Preferably, the battery cell gripper is provided with a protective sleeve for gripping the battery cell.

[0010] Preferably, the cell OCV test channel is provided with an OCV test mechanism, an OCV test rotation mechanism, an OCV lifting mechanism, an OCV shifting mechanism, and a cell placement limiting block.

[0011] Preferably, the OCV testing mechanism is provided with a probe base, a probe, and a limiting block; the OCV testing rotation mechanism is provided with a rotary motor to control the rotation of the OCV testing mechanism; the OCV lifting mechanism is provided with a lifting motor, which controls the OCV testing mechanism to lift and lower, so that the probe located on the OCV testing mechanism contacts the battery cell terminal; the OCV shifting mechanism is provided with an OCV shifting motor, and when the OCV shifting motor is activated, the battery cell is placed on the limiting block and fixed.

[0012] Preferably, the OCV test rotation mechanism includes a connecting main lead screw, a probe pitch-changing connecting rod, and an OCV rotation mechanism motor; the OCV lifting mechanism includes a height control connecting rod and an OCV lifting mechanism motor; and the OCV shifting mechanism includes a connecting main lead screw and an OCV shifting motor.

[0013] Preferably, the cell thickness testing channel is provided with two parallel guide rails, a cell clamping block perpendicular to the guide rails and movable along the guide rails, and a telescopic cylinder provided on the cell clamping block. When the telescopic cylinder is activated, the cell clamping block located on the guide rails moves in the same direction.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0015] (1) This utility model has a reasonable layout, compact structure, and is practical and convenient.

[0016] (2) This utility model reduces the degree of human intervention, improves the automation level of lithium battery OCV detection, increases detection efficiency, and has extremely high practicality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the mechanism of this utility model;

[0018] Figure 2 This utility model relates to a battery cell gripping and transplanting mechanism.

[0019] Figure 3 This invention relates to a battery cell OCV testing mechanism.

[0020] Attached reference numerals: 1. Test platform; 2. Cell unloading buffer channel; 3. Third cell gripping and transplanting mechanism; 4. Second cell gripping and transplanting mechanism; 5. First cell gripping and transplanting mechanism; 6. Column gantry; 7. Cell OCV test channel; 8. Cell thickness test channel; 9. Right cell gripping claw; 10. Automatic pitch motor; 11. Electric gripper fixing beam; 12. Transplanting mechanism moving fixing plate; 13. Transplanting guide rail plate; 14. Transplanting mechanism triangular fixing bracket; 15. Transplanting mechanism lifting motor; 16. Transplanting mechanism lifting tank chain; 17. Left cell gripping claw; 18. Cell gripping protective sleeve; 19. Transplanting mechanism lifting fixing plate; 20. Left OCV lifting mechanism height control link 21. Connecting rod; 22. OCV testing unit; 23. OCV testing mechanism rotary motor; 24. Cell testing placement platform; 25. Cell QR code reader; 26. OCV testing mechanism shifting motor; 27. Probe width adjustment motor; 28. OCV testing mechanism shifting control board; 29. ​​Test probe width adjustment screw; 30. OCV testing mechanism shifting control screw; 31. Left cell height detection mechanism; 32. Right cell height detection mechanism; 33. OCV testing mechanism lifting motor; 34. OCV testing mechanism connecting main screw; 35. Right OCV lifting mechanism height control connecting rod; 36. Left OCV testing mechanism shifting guide rail; 37. Right OCV testing mechanism shifting guide rail. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This invention provides a flexible and compatible automated testing device for various battery cells, specifically designed for different specifications and suitable for different types of cells. The device includes a testing platform 1, on which multiple parallel column gantry frames 6 are mounted. Multiple parallel guide rails are mounted on these guide rails. These mechanisms are equipped with automatically adjustable-pitch electric grippers and lifting motors for precise control of cell gripping and placement.

[0023] The test platform 1 is equipped with a cell OCV test channel 7, which includes an OCV test mechanism, an OCV test rotation mechanism, an OCV lifting mechanism, an OCV shifting mechanism, and a cell placement limiting block. The OCV test mechanism has multiple OCV test detection units 21, each with a probe base. Test probes are fixed to the probe base. The OCV test rotation mechanism is equipped with an OCV test mechanism rotation motor 22, which controls the rotation of the OCV test mechanism. The OCV lifting mechanism is equipped with an OCV test mechanism lifting motor 32, which controls the lifting and lowering of the OCV test mechanism to ensure that the test probes can contact the cell terminals. The OCV shifting mechanism is equipped with an OCV test mechanism shifting motor 25, which, when activated, fixes the cell onto the cell placement limiting block on the cell test placement platform 23.

[0024] In addition, the test platform 1 is equipped with multiple cell thickness test channels 8. Each channel is equipped with two parallel guide rails, a cell clamp that can move along the guide rails, and a telescopic cylinder, so that when the telescopic cylinder on the cell clamp is activated, the cell clamp on the guide rail can move along the guide rail direction.

[0025] To improve efficiency and compatibility, the column gantry 6 on the test platform 1 is preferably equipped with three sets of cell gripping and transplanting mechanisms, and each cell gripping and transplanting mechanism is preferably equipped with four sets of automatically variable-pitch electric grippers. The OCV test mechanism includes cell placement limiting blocks and multiple detection units, which are sequentially distributed on the OCV test rotating mechanism and connected to a voltage detector. Each detection unit includes at least one probe base and two probes, which are connected to the voltage detector.

[0026] The OCV test rotation mechanism includes a connecting main lead screw, a probe pitch-changing connecting rod, and an OCV rotation mechanism motor. The OCV lifting mechanism includes a height control connecting rod and an OCV lifting mechanism motor. The OCV shifting mechanism includes a connecting main lead screw and an OCV shifting motor.

[0027] In the operation process, the first cell gripping and transfer mechanism 5 moves the lithium battery to the cell OCV testing channel 7 for OCV testing. The second cell gripping and transfer mechanism 4 moves the lithium battery that has completed the OCV test to the cell thickness testing channel 8 for thickness testing. The third cell gripping and transfer mechanism 3 then moves the lithium battery that has completed the test to the cell unloading buffer channel 2, completing the unloading process. The entire equipment is designed to reduce manual intervention, increase automation, and improve testing efficiency, and is suitable for compatible testing of various cell specifications.

[0028] Specifically, the equipment is based on a test platform 1, which is equipped with a column gantry 6. Three sets of battery cell gripping and transplanting mechanisms are installed on the column gantry 6. These battery cell gripping and transplanting mechanisms include battery cell clamping assemblies, which include a left battery cell gripping claw 17, a right battery cell gripping claw 9, an automatic pitch-changing motor 10, an electric claw fixing beam 11, a transplanting mechanism moving fixing plate 12, a transplanting mechanism lifting motor 15, and a battery cell gripping protective sleeve 18.

[0029] The first cell gripping and transfer mechanism 5 is located above the path between the cell conveyor chain and the cell OCV testing channel 7, and is responsible for transferring the cell from the conveyor chain to the testing channel. The second cell gripping and transfer mechanism 4 is located above the path between the cell OCV testing channel 7 and the cell thickness testing channel 8, and is used to transfer the cell from the OCV testing channel to the thickness testing channel. The third cell gripping and transfer mechanism 3 is located above the path between the cell thickness testing channel 8 and the cell offline buffer channel 2, and is responsible for transferring the tested cell to the buffer channel.

[0030] In the configuration of cell OCV test channel 7, the equipment includes four test units, each equipped with an OCV test detection unit 21. These OCV test detection units 21 consist of a probe base and two probes. The probe base is mounted on the connecting main lead screw 33 of the OCV test mechanism, and the probes are fixed on the base and connected to the voltage test instrument. The probe base and probes can be disassembled and installed.

[0031] To accommodate the testing needs of battery cells of different specifications, the equipment in the battery cell OCV testing channel 7 also includes an OCV testing mechanism lifting motor 32, a probe width adjustment motor 26, an OCV testing mechanism rotation motor 22, and an OCV testing mechanism shifting motor 25. The inclusion of these motors allows the equipment to be flexibly adjusted to adapt to the testing conditions of different battery cells, ensuring the efficiency and accuracy of the testing process.

[0032] refer to Figures 1 to 3 This utility model discloses a fully automatic testing device that is flexible and compatible with multiple battery cells, used for automatic voltage testing of battery cell products of various specifications.

[0033] Column gantry 6: Column gantry 6 is connected to transplant guide plate 13, and connects to the first cell grabbing and transplanting mechanism 5, the second cell grabbing and transplanting mechanism 4, and the third cell grabbing and transplanting mechanism 3, and synchronously grabs and moves the cell to the cell OCV test channel 7, the cell thickness test channel 8, and the cell offline buffer channel 2.

[0034] Transplanting mechanism lifting motor 15: Transplanting mechanism lifting motor 15 is connected to transplanting mechanism moving fixed plate 12. When transplanting mechanism lifting motor 15 rotates forward, it can lower transplanting mechanism lifting fixed plate 19. When transplanting mechanism lifting motor 15 rotates in reverse, it can raise transplanting mechanism lifting fixed plate 19.

[0035] Automatic variable pitch motor 10: Automatic variable pitch motor 10 is connected to the right battery cell gripper 9 and the left battery cell gripper 17. When the automatic variable pitch motor 10 rotates forward, the right battery cell gripper 9 and the left battery cell gripper 17 can move synchronously in opposite directions. When the automatic variable pitch motor 10 rotates in reverse, the right battery cell gripper 9 and the left battery cell gripper 17 can move synchronously in opposite directions.

[0036] Cell OCV testing channel 7: Equipped with multiple OCV testing units 21, connected to test probe width adjusting screws 28. Each OCV testing unit 21 has two sets of test probes. The test probe width adjusting screws 28 are connected to a probe width adjusting motor 26. Forward rotation of the motor increases the distance between the test probes in the OCV testing unit 21, while reverse rotation decreases the distance. The test probes are connected to the cell terminals via wires and then to the testing instrument. Multiple cell QR code readers 24 are provided. The measurement data from the OCV testing units 21 is bound to the cell codes read by the QR code readers 24 for precise traceability. OCV testing mechanism shift control board 27, connected to an OCV testing mechanism shift control screw 29, controls the movement of the cell OCV testing channel 7 via an OCV testing mechanism shift motor 25. Forward rotation of the motor moves the cell OCV testing channel 7 inward, while reverse rotation moves it outward. The OCV testing mechanism is connected to the main lead screw 33, which is connected to the OCV testing mechanism rotary motor 22 via a synchronous belt. Reversing the motor causes the OCV testing unit 21 to flip outward, while rotating the motor forward causes the OCV testing unit 21 to flip inward, allowing the test probe to contact the battery cell under test. It is also connected to the left OCV lifting mechanism height control connecting rod 20 and the right OCV lifting mechanism height control connecting rod 34. The OCV testing unit 21 is raised and lowered synchronously via the OCV testing mechanism lifting motor 32. Rotating the motor forward causes the OCV testing unit 21 to rise as a whole, while rotating the motor backward causes the OCV testing unit 21 to fall as a whole.

[0037] Left OCV test mechanism shift guide rail 35, right OCV test mechanism shift guide rail 36: When the OCV test mechanism shift motor 25 is activated, the overall OCV test structure is displaced on the left OCV test mechanism shift guide rail 35 and the right OCV test mechanism shift guide rail 36, so that the test probe of the OCV test detection unit 21 is in the same position as the electrode post of the cell under test.

[0038] The usage process of this utility model is as follows:

[0039] 1. Horizontal relocation of trusses.

[0040] 2. The first cell gripping and transplanting mechanism 5, the second cell gripping and transplanting mechanism 4, and the third cell gripping and transplanting mechanism 3 descend synchronously. The first cell gripping and transplanting mechanism 5 grips the cell from the cell conveyor chain and places it in the cell OCV test channel 7.

[0041] 3. The first battery cell gripping and transplanting mechanism 5, the second battery cell gripping and transplanting mechanism 4, and the third battery cell gripping and transplanting mechanism 3 rise synchronously.

[0042] 4. The OCV testing mechanism rotates the rotary motor 22, the OCV testing detection unit 21 flips inward, the test probe contacts the cell under test, and the OCV test data is collected.

[0043] 5. Horizontal relocation of trusses.

[0044] 6. The first cell gripping and transplanting mechanism 5, the second cell gripping and transplanting mechanism 4, and the third cell gripping and transplanting mechanism 3 descend synchronously. The first cell gripping and transplanting mechanism 5 grips the cell from the cell conveying plate chain and places it in the cell OCV test channel 7. The second cell gripping and transplanting mechanism 4 grips the cell from the cell OCV test channel 7 and places it in the cell thickness test channel 8.

[0045] 7. The first battery cell gripping and transplanting mechanism 5, the second battery cell gripping and transplanting mechanism 4, and the third battery cell gripping and transplanting mechanism 3 rise synchronously.

[0046] 8. The OCV testing mechanism rotates the rotary motor 22, the OCV testing detection unit 21 flips inward, the test probe contacts the cell under test, and the OCV test data is collected; the cell thickness test channel 8 measures the cell thickness.

[0047] 9. Horizontal relocation of trusses.

[0048] 10. The first cell gripping and transplanting mechanism 5, the second cell gripping and transplanting mechanism 4, and the third cell gripping and transplanting mechanism 3 descend synchronously. The first cell gripping and transplanting mechanism 5 grips the cell from the cell conveyor chain and places it in the cell OCV test channel 7; the second cell gripping and transplanting mechanism 4 grips the cell from the cell OCV test channel 7 and places it in the cell thickness test channel 8; the third cell gripping and transplanting mechanism 3 grips the cell from the cell thickness test channel 8 and places it in the cell offline buffer channel 2.

[0049] 11. Based on the differences in the width, thickness, and height of the battery cells, the OCV testing mechanism shifting motor 25, probe width adjustment motor 26, OCV testing mechanism lifting motor 32, and automatic pitch motor 10 automatically adjust the relevant parameters to flexibly accommodate multiple products.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flexible and compatible multi-cell on-line automatic test equipment, characterized in that, The test platform (1) is provided with an electric core conveying plate chain, an electric core OCV test channel (7), an electric core thickness test channel (8), and an electric core offline buffer channel (2) in sequence, and a column gantry (6) is further arranged on the test platform (1), three groups of movable electric core grabbing transplanting mechanisms are arranged on the column gantry (6), and the three groups of electric core grabbing transplanting mechanisms are arranged above the paths between the electric core conveying plate chain and the electric core OCV test channel (7), between the electric core OCV test channel (7) and the electric core thickness test channel (8), and between the electric core thickness test channel (8) and the electric core offline buffer channel (2). 2.The flexible and compatible multi-cell online automatic test equipment according to claim 1, wherein, The first electric core grabbing transplanting mechanism (5) moves the lithium battery to the electric core OCV test channel (7) for OCV test, the second electric core grabbing transplanting mechanism (4) moves the lithium battery after detection to the electric core thickness test channel (8) for thickness test, and the third electric core grabbing transplanting mechanism (3) moves the lithium battery after detection to the electric core offline buffer channel (2), so as to complete the discharge of the lithium battery. 3.The flexible and compatible multi-cell online automatic test device according to claim 1, wherein, The electric core grabbing transplanting mechanism comprises a moving mechanism connected with the column gantry (6), a lifting mechanism arranged at the bottom of the moving mechanism, an automatic variable distance mechanism arranged at the bottom of the lifting mechanism, and an electric core grabbing clamp jaw arranged at the bottom of the automatic variable distance mechanism.

4. The flexible and compatible multi-cell online automatic test equipment according to claim 3, characterized in that, A lifting tank chain is connected between the automatic variable distance mechanism and the electric core grabbing clamp jaw.

5. The flexible and compatible multi-cell online automatic test equipment according to claim 4, characterized in that, The electric core grabbing clamp jaw is provided with an electric core grabbing protective rubber sleeve (18).

6. The flexible and compatible multi-cell online automatic test equipment according to claim 1, characterized in that, The electric core OCV test channel (7) is provided with an OCV test mechanism, an OCV test rotating mechanism, an OCV lifting mechanism, an OCV shifting mechanism, and an electric core placing limiting block.

7. The flexible and compatible multi-cell online automatic test equipment according to claim 6, characterized in that, The OCV test mechanism is provided with a probe base, a probe, and a limiting block; the OCV test rotating mechanism is provided with a rotating motor to control the rotation of the OCV test mechanism; the OCV lifting mechanism is provided with a lifting motor, and when the OCV test mechanism is lifted, the probe on the OCV test mechanism contacts the electric core pole; the OCV shifting mechanism is provided with an OCV shifting motor, and when the OCV shifting motor acts, the electric core is fixed on the limiting block.

8. The flexible and compatible multi-cell online automatic test equipment according to claim 6, characterized in that, The OCV test rotating mechanism comprises a connecting main lead screw, a probe variable distance connecting rod, and an OCV rotating mechanism motor; the OCV lifting mechanism comprises a height control connecting rod and an OCV lifting mechanism motor; and the OCV shifting mechanism comprises a connecting main lead screw and an OCV shifting motor.

9. The flexible and compatible multi-cell online automatic test equipment according to claim 1, characterized in that, The electric core thickness test channel (8) is provided with two parallel guide rails, an electric core clamp block perpendicular to the guide rails and movable along the guide rails, and a telescopic cylinder arranged on the electric core clamp block, and when the telescopic cylinder acts, the electric core clamp block on the guide rail moves in the same direction.

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