Battery cell OCV testing device

Abstract

The utility model relates to the technical field of battery cell testing devices, in particular to a battery cell OCV testing device which comprises a machine frame, a transferring mechanism used for conveying battery cells is arranged on the machine frame and comprises a support, a transverse moving module is arranged between the bottom of the support and the machine frame, one side of the machine frame is connected with a tool mechanism, and the tool mechanism is connected with the machine frame. A lifting transmission structure is further arranged between the tool mechanism and the support, a tool clamp capable of rotating around the horizontal axis is arranged on the tool mechanism, a clamping opening, used for clamping a battery cell, of the tool clamp is arranged back to the support, and a detection mechanism is arranged on the machine frame and located on the outer side of the clamping opening of the tool clamp. The detection mechanism is provided with a detection electrode capable of moving close to or away from one side of the clamping opening of the tool clamp. According to the utility model, problems that some existing OCV detection structures are tedious and the detection efficiency is not high can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core testing devices, in particular to a battery core OCV testing device. Background Art

[0002] The booming development of new energy vehicles is driving higher demands for range, safety, and charging speed. Before battery cells are manufactured into modules, they must undergo OCV testing to ensure they meet production requirements. Traditional testing equipment requires manual intervention, resulting in low efficiency, high costs, and potential safety risks, hindering business development.

[0003] There are also some that perform corresponding tests through detection equipment. For example, Chinese patent CN209524899U discloses a lithium battery cell thickness OCV testing equipment, which includes a cell cache warehouse arranged on a workbench, a material picking mechanism arranged on one side of the cell cache warehouse, a thickness testing mechanism arranged on one side of the material picking mechanism, a test material transfer mechanism arranged on one side of the thickness testing mechanism, an OCV testing table arranged on one side of the test material transfer mechanism, a cell conveying mechanism arranged on one side of the OCV testing table, a cell cache station arranged on one side of the cell conveying mechanism, an NG output platform arranged on the other side of the cell conveying mechanism, and an NG pushing mechanism arranged in the NG output platform.

[0004] The OCV test structure in the above technical solution has an independent test bench equipped with a rotating structure. The detection electrode is fixed on one side of the test bench. During operation, the test bench is required to rotate the electrode side of the battery cell to the detection electrode side, and then the detection electrode is extended for detection. This detection method has cumbersome steps and large time constraints for the connection between the front and back, resulting in the detection efficiency being dragged down by the workpiece movement method. Utility Model Content

[0005] The utility model provides a battery cell OCV testing device, which is beneficial to solving the problems of complicated OCV detection structures and low detection efficiency in some existing OCV detection devices.

[0006] The utility model is achieved in this way:

[0007] A battery cell OCV testing device comprises a frame, the frame is provided with a transfer mechanism for conveying battery cells, the transfer mechanism comprises a bracket, a transverse movement module is provided between the bottom of the bracket and the frame, a tooling mechanism is connected to one side of the frame, a lifting transmission structure is further provided between the tooling mechanism and the bracket, the tooling mechanism is provided with a tooling fixture capable of rotating around a horizontal axis, the tooling fixture is used to clamp the battery cell, the clamping opening of the tooling fixture is arranged facing away from the bracket, the frame is provided with a detection mechanism on the outside of the clamping opening of the tooling fixture, the detection mechanism is provided with a detection electrode that can move closer to or away from the clamping opening of the tooling fixture.

[0008] On the basis of the above technical solution, the moving direction of the transverse movement module is perpendicular to the moving direction of the detection electrode.

[0009] On the basis of the above technical solution, a vertically arranged screw rod is pivoted on the bracket of the transfer mechanism, a slider is threadedly connected to the screw rod, the tooling mechanism is fixedly connected to one side of the slider, the screw rod is transmission-connected to a reduction motor, and the reduction motor is fixed on the bracket.

[0010] Based on the above technical solution, the tooling mechanism includes a tooling plate connected and fixed to the slider. The tooling plate is a vertical plate structure, and a number of tooling components are provided on the side away from the transfer mechanism. The tooling components include a rotating cylinder and a tooling fixture. The rotating cylinder can drive the tooling fixture to rotate back and forth around the horizontal axis.

[0011] On the basis of the above technical solution, the fixture has two pneumatic clamps that can open and close to clamp the battery core.

[0012] On the basis of the above technical solution, a constraint frame is provided between the rotating cylinder and the tooling fixture, the constraint frame is fixed on the tooling plate, the output end of the rotating cylinder is connected to the constraint frame through a bearing, the tooling fixture is connected to the output end of the rotating cylinder, and the rotating cylinder and the tooling fixture are respectively arranged on both sides of the constraint frame, and an angle detection structure is provided between the tooling fixture and the constraint frame.

[0013] Based on the above technical solution, the angle detection structure includes a signal part provided on the fixture, and a rotation detection part provided on the constraint frame. The signal part can rotate with the fixture. The rotation detection part is two U-shaped sensors fixed on the side wall of the constraint frame at a threshold angle, and its detection area is located on the rotation path of the signal part.

[0014] Based on the above technical solution, the detection mechanism includes a pillar connected to the frame, a detection cylinder is provided on the pillar, the telescopic rod of the detection cylinder is arranged horizontally, the end of the telescopic rod is connected to a movable plate, and the movable plate is provided with a detection electrode.

[0015] On the basis of the above technical solution, the detection mechanism is further provided with a station sensor for detecting whether the battery cell reaches the detection station.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] The utility model sets up a transfer mechanism and a tooling mechanism that can work together. The transfer mechanism is provided with a transverse movement structure and a lifting structure, and the tooling mechanism is provided with a rotating structure, so that after clamping the battery cell, the transverse movement, lifting and rotating actions can be performed synchronously, thereby reducing the rhythm of the material transportation steps and shortening the material transportation time. In conjunction with the transverse movement of the detection electrode in the detection mechanism, multiple processes such as feeding, OCV testing, and discharging can be carried out in succession after one material is grabbed. This not only simplifies the equipment structure, but also greatly improves the work efficiency, which is conducive to solving the problem that some existing OCV detection structures are cumbersome and the detection efficiency is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 Schematic diagram of the structure of a battery cell OCV testing device in one embodiment;

[0020] Figure 2 for Figure 1 Side view of

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the intermediate transfer mechanism and tooling mechanism;

[0022] Figure 4 This is a schematic diagram of the assembly structure of a detection mechanism in one embodiment;

[0023] Figure 5 This is a structural diagram of a tooling mechanism in one embodiment;

[0024] Figure 6 This is a schematic structural diagram of a single tooling assembly in one embodiment;

[0025] Figure 7 for Figure 4 Schematic diagram of the structure of the detection agency.

[0026] Markings in the figure: 1. Frame; 11. Workbench; 2. Transfer mechanism; 21. Reducer motor; 22. Screw; 23. Slider; 24. Transverse movement module; 3. Tooling mechanism; 31. Tooling plate; 32. Rotating cylinder; 33. Tooling fixture; 331. Pneumatic gripper; 34. Constraint frame; 35. Rotating detection part; 36. Signal part; 4. Detection mechanism; 41. Pillar; 42. Detection cylinder; 43. Movable plate; 44. Detection electrode; 45. Work position sensor; a. Battery cell. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0028] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically specified.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] See also Figures 1 to 7 This embodiment discloses a battery cell OCV testing device that can efficiently help battery cell a perform OCV testing and battery cell series and parallel connection.

[0032] The testing device specifically includes a box-type frame 1, which is assembled from metal profiles and panels and mainly serves as a load-bearing support. A horizontal workbench 11 is provided on the top of the frame.

[0033] A transfer mechanism 2 , a tooling mechanism 3 and a detection mechanism 4 are provided on the workbench 11 .

[0034] Furthermore, the transfer mechanism 2 is used to transport the battery cell a to complete the material transfer before and after the OCV test. Specifically, the transfer mechanism 2 includes a bracket composed of six vertically arranged triangular plates spaced apart and fixed at the top and bottom by horizontal plates. The triangular plates are narrow at the top and wide at the bottom, and have several hollow through-holes, ensuring structural strength while maintaining relative lightness.

[0035] A transverse module 24 is provided between the bottom of the bracket and the frame 1. The transverse module 24 includes a horizontal slide. A linear module is provided between the bottom of the slide and the workbench 11. The bracket is fixed on the slide and can move back and forth laterally with the slide.

[0036] Further, combined Figure 3 As shown, the transfer mechanism 2 has a vertically mounted screw rod 22 pivotally mounted on a support frame. A slider 23 is threadedly connected to the screw rod 22. The screw rod 22 is in transmission connection with a reduction motor 21, which is fixed to the support frame. During operation, the reduction motor 21 drives the screw rod 22 to rotate, thereby controlling the up and down movement of the slider 23.

[0037] The lateral movement direction of the bracket is defined as the left-right direction, and the horizontal direction perpendicular to this direction is the front-back direction.

[0038] The front side of the frame 1 is connected to a tooling mechanism 3, which is used to clamp the battery cell a and cooperate with the transfer mechanism 2 to perform the transfer operation of the battery cell a.

[0039] Specifically, the fixture mechanism 3 is provided with a fixture fixture 33 that can rotate around a horizontal axis (horizontally facing forward and backward), and the fixture fixture 33 is used to clamp the battery cell a with its clamping opening facing away from the bracket, that is, the clamping opening faces the front.

[0040] Among them, combined Figure 5 The tooling mechanism 3 includes a tooling plate 31 connected and fixed to the slider 23. The tooling plate 31 is a vertical plate structure. Five tooling components evenly distributed laterally are provided on the side away from the transfer mechanism 2. The tooling components include a rotating cylinder 32 and a tooling fixture 33. The rotating cylinder 32 can drive the tooling fixture 33 to rotate back and forth around the horizontal axis.

[0041] The fixture 33 features two pneumatic jaws 331 that can open and close to grip the battery cell a. These jaws are sheathed in polyurethane to minimize damage to the cell a during gripping. A rotary cylinder 32 and pneumatic jaws 331 are connected to an external air compressor, allowing them to rotate and swing after securing the cell a, adjusting the fixture angle to meet testing requirements.

[0042] Further, combined Figure 6 As shown, a restraint frame 34 is provided between the rotating cylinder 32 and the fixture 33, and the restraint frame 34 is fixed on the fixture plate 31. The output end of the rotating cylinder 32 is connected to the restraint frame 34 through a bearing, and the fixture 33 is connected to the output end of the rotating cylinder 32, and the rotating cylinder 32 and the fixture 33 are respectively arranged on both sides of the restraint frame 34, and an angle detection structure is provided between the fixture 33 and the restraint frame 34.

[0043] The angle detection structure includes a signal element 36 mounted on the fixture 33 and a rotation detection element 35 mounted on the restraint frame 34. The signal element 36 rotates with the fixture 33. The rotation detection element 35 consists of two U-shaped sensors fixed to the side walls of the restraint frame 34 at a threshold angle, with their detection areas located along the rotation path of the signal element 36. This allows for precise control of the rotation angle of cell a.

[0044] like Figure 1 and Figure 2 As shown, the frame 1 is provided with a detection mechanism 4 on the front side of the clamping port of the fixture 33, and the detection mechanism 4 is provided with a detection electrode 44 that can move closer to or away from the clamping port of the fixture 33. The moving direction of the transverse module 24 is perpendicular to the moving direction of the detection electrode 44.

[0045] Specific, combined Figure 4 and Figure 7 As shown, the detection mechanism 4 includes a support 41 connected to the frame 1. The support 41 is a vertical metal rod. A detection cylinder 42 is provided on the support 41. The detection cylinder 42 is connected to an external air compressor. The telescopic rod of the detection cylinder 42 is horizontally arranged and faces forward and backward. The end of the telescopic rod (located at the rear side) is connected to a movable plate 43. The movable plate 43 is provided with a detection electrode 44 corresponding to the electrode position on the battery cell a. It should be noted that a strip hole is provided on the movable plate 43. The detection electrode 44 can be adjusted and locked in the strip hole as needed, making its assembly position more flexible to meet the operational requirements of various battery cell a products with different electrode positions.

[0046] Furthermore, in order to make the detection more efficient and accurate, the detection mechanism 4 is further provided with a station sensor 45 for detecting whether the battery cell a reaches the detection station, which is specifically an infrared sensor.

[0047] During the specific implementation process, in cooperation with the external battery cell conveying mechanism, the pneumatic clamp on the tooling fixture 33 clamps and fixes the battery cell a, and the transfer mechanism 2 and the tooling mechanism 3 work together to synchronously perform lifting, left and right lateral movement, and rotation movements, so that the battery cell a can quickly and accurately reach the test station. After the station sensor 45 detects the signal, the telescopic cylinder drives the detection electrode 44 to move backward and contact the electrode on the battery cell a to perform an OCV test. After the test is completed, the transfer mechanism 2 and the tooling mechanism 3 work together again to transfer the battery cell a, and the detection electrode 44 is reset and ready for the next cycle of detection operations.

[0048] It should be noted that the detection structure is equipped with an NG alarm system, which is a prior art. The specific structure and the working principle based on which the structure operates will not be described in detail here.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery cell OCV testing device, characterized in that: The invention comprises a frame (1), wherein the frame (1) is provided with a transfer mechanism (2) for conveying an electric core (a), the transfer mechanism (2) comprises a bracket, a transverse movement module (24) is provided between the bottom of the bracket and the frame (1), a tooling mechanism (3) is connected to one side of the frame (1), a lifting transmission structure is further provided between the tooling mechanism (3) and the bracket, the tooling mechanism (3) is provided with a tooling fixture (33) capable of rotating around a horizontal axis, the tooling fixture (33) is used for clamping the electric core (a) and its clamping opening is arranged facing away from the bracket, the frame (1) is provided with a detection mechanism (4) on the outside of the clamping opening of the tooling fixture (33), and the detection mechanism (4) is provided with a detection electrode (44) capable of moving closer to or away from one side of the clamping opening of the tooling fixture (33).

2. A battery cell OCV testing device according to claim 1, characterized in that: The moving direction of the transverse movement module (24) is perpendicular to the moving direction of the detection electrode (44).

3. The battery cell OCV testing device according to claim 1, characterized in that: A vertically arranged screw rod (22) is pivotally mounted on the bracket of the transfer mechanism (2), a slider (23) is threadedly connected to the screw rod (22), the tooling mechanism (3) is fixedly connected to one side of the slider (23), the screw rod (22) is transmission-connected to a reduction motor (21), and the reduction motor (21) is fixedly mounted on the bracket.

4. A battery cell OCV testing device according to claim 3, characterized in that: The tooling mechanism (3) includes a tooling plate (31) connected and fixed to the slider (23). The tooling plate (31) is a vertical plate structure. A plurality of tooling components are provided on a side of the tooling plate away from the transfer mechanism (2). The tooling components include a rotary cylinder (32) and a tooling fixture (33). The rotary cylinder (32) can drive the tooling fixture (33) to reciprocate around a horizontal axis.

5. A battery cell OCV testing device according to claim 4, characterized in that: The fixture (33) has two pneumatic clamping jaws (331) capable of opening and closing to clamp the battery core (a).

6. The battery cell OCV testing device according to claim 4, characterized in that: A restraining frame (34) is provided between the rotating cylinder (32) and the fixture (33), the restraining frame (34) is fixed on the fixture plate (31), the output end of the rotating cylinder (32) is connected to the restraining frame (34) through a bearing, the fixture (33) is connected to the output end of the rotating cylinder (32), and the rotating cylinder (32) and the fixture (33) are respectively provided on both sides of the restraining frame (34), and an angle detection structure is provided between the fixture (33) and the restraining frame (34).

7. The battery cell OCV testing device according to claim 6, characterized in that: The angle detection structure comprises a signal member (36) provided on a fixture (33) and a rotation detection member (35) provided on a restraining frame (34); the signal member (36) is capable of rotating along with the fixture (33); the rotation detection member (35) is two U-shaped sensors fixed on the side wall of the restraining frame (34) at a threshold angle, and its detection area is located on the rotation path of the signal member (36).

8. The battery cell OCV testing device according to claim 1, characterized in that: The detection mechanism (4) comprises a support (41) connected to the frame (1), a detection cylinder (42) is provided on the support (41), a telescopic rod of the detection cylinder (42) is arranged horizontally, a movable plate (43) is connected to the end of the telescopic rod, and a detection electrode (44) is provided on the movable plate (43).

9. The battery cell OCV testing device according to claim 8, characterized in that: The detection mechanism (4) is further provided with a station sensor (45) for detecting whether the battery cell (a) has reached the detection station.

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