MCU-based lithium battery constant voltage and constant current automatic switching test device

Abstract

The utility model discloses a lithium battery constant voltage constant current automatic switching testing device based on MCU relates to lithium battery testing device technical field, including the casing, is installed with test mechanism on the casing, is rotatably connected with the rotating roller in the casing, is installed with servo motor on the casing side, and servo motor drive shaft is connected with the rotating roller axle, and the rotating roller side is connected with a plurality of mounting plates, and is connected with a plurality of fixed clamping plates on the mounting plate, and the movable plate is slidably arranged on the mounting plate, and the movable clamping plate is elastically arranged on the movable plate side, the utility model's advantage lies in: through manual lithium battery is placed between first rubber pad and second rubber pad, subsequent clamping (servo pushrod drive slider drives movable clamping plate), station switching (servo motor drives rotating roller to rotate mounting plate), electrode butt joint (electric pushrod promotes inner contact plate), unloading (servo pushrod reverse pull slider release battery) are all automatically completed, and simultaneously can realize continuous test.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery testing devices, specifically a lithium battery constant voltage and constant current automatic switching testing device based on MCU. Background Technology

[0002] With the explosive growth of new energy vehicles, energy storage power stations and other fields, the performance and safety requirements of lithium batteries as the core energy storage carrier continue to rise.

[0003] In existing technologies, constant voltage and constant current tests are required for lithium batteries;

[0004] However, most traditional devices rely on manual operation to complete the "clamping and unloading" process of lithium batteries, which is inconvenient for personnel to use. To address this, we propose an MCU-based lithium battery constant voltage and constant current automatic switching test device. Utility Model Content

[0005] The purpose of this invention is to provide an MCU-based automatic switching test device for lithium batteries with constant voltage and constant current.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery constant voltage and constant current automatic switching test device based on an MCU, comprising a housing, a test mechanism mounted on the housing, a rotating roller rotatably connected inside the housing, a servo motor mounted on the side of the housing, the transmission shaft of the servo motor connected to the rotating roller shaft, several mounting plates connected to the side of the rotating roller, several fixed clamping plates connected to the mounting plates, a fixed plate connected to the mounting plates, a movable contact plate elastically provided on the side of the fixed plate, the length direction of the movable contact plate being perpendicular to the length direction of the fixed clamping plate, an electric push rod mounted inside the housing, the telescopic end of the electric push rod connected to the inner contact plate, several electrodes connected to the inner contact plate, and each electrode corresponding to the position between the fixed clamping plate and the movable clamping plate, each electrode being connected to the test mechanism via a cable;

[0007] A movable plate is slidably disposed on the mounting plate, and a movable clamping plate is elastically disposed on the side of the movable plate.

[0008] As a further embodiment of this utility model: a first rubber pad is fixedly connected to the side of the fixed clamping plate, and a groove is provided on the side of the first rubber pad facing the movable clamping plate.

[0009] As a further embodiment of this utility model: a second rubber pad is fixedly connected to the side of the movable clamping plate, and a groove is formed on the side of the second rubber pad facing the fixed clamping plate.

[0010] As a further embodiment of this utility model: a first elastic spring is fixedly connected to the side of the fixed plate, the other end of the first elastic spring is fixedly connected to the movable contact plate, a connecting rod is slidably arranged on the fixed plate, the other end of the connecting rod is fixedly connected to the movable contact plate, and the connecting rod has a "T" shaped structure;

[0011] The movable contact plate is connected to several electrodes, and each electrode corresponds to the position between the fixed clamp and the movable clamp. Several metal plates are provided on the side of the movable contact plate, and each electrode is connected to each metal plate through a circuit.

[0012] As a further embodiment of this utility model: a fixed contact plate is fixedly connected inside the housing;

[0013] The fixed contact plate is made of metal and is grounded via a ground wire. When the fixed contact plate is flush with the mounting plate, it contacts the metal plate on the side of the movable contact plate.

[0014] As a further embodiment of this utility model: a sliding groove is provided on the mounting plate, a slider is slidably disposed in the sliding groove, a protrusion is provided at the upper end of the slider, a servo push rod is fixedly connected to the mounting plate, and the servo push rod is fixedly connected to the protrusion provided at the upper end of the slider.

[0015] As a further embodiment of this utility model: a second elastic spring is fixedly connected to the side of the movable plate, the other end of the second elastic spring is fixedly connected to the movable clamping plate, and a protrusion is connected to the side of the movable clamping plate, which is connected to the upper surface of the slider.

[0016] Compared with the prior art, the beneficial effects of this utility model by adopting the above technical solution are as follows:

[0017] 1. This utility model allows for the manual placement of lithium batteries between the first and second rubber pads. Subsequent clamping (servo push rod drives the slider to move the clamping plate), station switching (servo motor drives the rotating roller to rotate the mounting plate), electrode docking (electric push rod pushes the inner contact plate), and unloading (servo push rod pulls the slider in the opposite direction to release the battery) are all completed automatically, and continuous testing can be achieved at the same time.

[0018] 2. This utility model uses a first rubber pad and a second rubber pad to contact the battery. The first rubber pad is made of flexible material, which can avoid direct rigid contact between the fixing plate (metal material) and the cylindrical lithium battery shell, and prevent the clamp from scratching the battery shell during the test. The second rubber pad is made of flexible material, which can avoid direct rigid contact between the fixing plate (metal material) and the cylindrical lithium battery shell, and prevent the clamp from scratching the battery shell during the test.

[0019] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the device in the embodiment of this utility model;

[0021] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0022] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0023] Figure 4 This is a schematic cross-sectional view of a partial structure of the device in an embodiment of this utility model;

[0024] Figure 5 for Figure 4 Enlarged structural diagram at point C.

[0025] In the diagram: 1. Housing; 2. Testing mechanism; 3. Rotary roller; 4. Servo motor; 5. Mounting plate; 6. Fixed contact plate; 7. Electric push rod; 8. Inner contact plate; 9. Fixed plate; 10. First elastic spring; 11. Connecting rod; 12. Moving contact plate; 13. Slide groove; 14. Slider; 15. Fixed clamping plate; 16. First rubber pad; 17. Moving clamping plate; 18. Second rubber pad; 19. Moving plate; 20. Second elastic spring; 21. Servo push rod. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0027] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Please see the appendix Figure 1 -Appendix Figure 5This utility model relates to an MCU-based lithium battery constant voltage and constant current automatic switching test device, comprising a housing 1, a test mechanism 2 mounted on the housing 1, a rotating roller 3 rotatably connected inside the housing 1, a servo motor 4 mounted on the side of the housing 1, the transmission shaft of the servo motor 4 being connected to the shaft of the rotating roller 3, several mounting plates 5 connected to the side of the rotating roller 3, several fixed clamping plates 15 connected to the mounting plates 5, a fixed plate 9 connected to the mounting plates 5, a movable contact plate 12 elastically arranged on the side of the fixed plate 9, the length direction of the movable contact plate 12 being perpendicular to the length direction of the fixed clamping plate 15, an electric push rod 7 mounted inside the housing 1, the telescopic end of the electric push rod 7 being connected to an inner contact plate 8, several electrodes connected to the inner contact plate 8, and each electrode corresponding to the position between the fixed clamping plate 15 and the movable clamping plate 17, each electrode being connected to the test mechanism 2 via a cable, a movable plate 19 slidably arranged on the mounting plate 5, and a movable clamping plate 17 elastically arranged on the side of the movable plate 19;

[0029] In practical use, the servo motor 4 drives the roller 3 to rotate, which in turn rotates the mounting plate 5, on which the lithium battery is installed, to the test position. At this time, the mounting plate 5 is flush with the fixed contact plate 6 inside the housing 1. The electrodes on the moving contact plate 12 contact the lithium battery motor, and the metal plate on the side of the moving contact plate 12 contacts the metal fixed contact plate 6. The telescopic end of the electric push rod 7 pushes the inner contact plate 8 to move, so that the electrodes on the inner contact plate 8 contact the electrodes of the lithium battery. The electrodes are connected to the lithium battery and the test mechanism 2 through cables. The test mechanism 2 starts the constant voltage and constant current test. In the test process, the testing mechanism 2 first charges or discharges the lithium battery in constant current mode according to the preset program. When the lithium battery voltage reaches the preset threshold, it automatically switches to constant voltage mode to continuously complete the test process. At the same time, the test data is collected in real time. After the test is completed, the servo push rod 21 moves in the opposite direction, pulling the slider 14 back along the slide groove 13. The moving clamp 17 and the fixed clamp 15 move away from each other, the clamping force is released, and the lithium battery automatically falls after losing its limit, completing the unloading. Then the rotating roller 3 can drive the next set of mounting plates 5 into the test station to realize continuous testing.

[0030] Furthermore, a first rubber pad 16 is fixedly connected to the side of the fixed clamping plate 15, and the first rubber pad 16 has a groove on the side facing the movable clamping plate 17.

[0031] Specifically, the first rubber pad 16 is made of flexible material, which can prevent the fixing clamp 15 (metal material) from directly and rigidly contacting the cylindrical lithium battery casing, and prevent the clamp from scratching the battery casing during the test.

[0032] Furthermore, a second rubber pad 18 is fixedly connected to the side of the movable clamping plate 17, and the second rubber pad 18 has a groove on the side facing the fixed clamping plate 15.

[0033] Specifically, the second rubber pad 18 is made of flexible material, which can prevent the fixing clamp 15 (metal material) from directly and rigidly contacting the cylindrical lithium battery casing, and prevent the clamp from scratching the battery casing during the test.

[0034] Furthermore, a first elastic spring 10 is fixedly connected to the side of the fixed plate 9, and the other end of the first elastic spring 10 is fixedly connected to the movable contact plate 12. A connecting rod 11 is slidably arranged on the fixed plate 9, and the other end of the connecting rod 11 is fixedly connected to the movable contact plate 12. The connecting rod 11 has a "T" shaped structure.

[0035] The movable contact plate 12 is connected to several electrodes, and each electrode corresponds to the position between the fixed clamping plate 15 and the movable clamping plate 17. Several metal plates are provided on the side of the movable contact plate 12, and each electrode is connected to each metal plate through a circuit.

[0036] Specifically, the first elastic spring 10 provides elastic preload to ensure that several electrodes on the movable contact plate 12 are in contact with the battery electrodes.

[0037] Furthermore, a fixed contact plate 6 is fixedly connected inside the housing 1;

[0038] Among them, the fixed contact plate 6 is made of metal. The fixed contact plate 6 is grounded through a ground wire. When the fixed contact plate 6 is flush with the mounting plate 5, the fixed contact plate 6 contacts the metal plate on the side of the movable contact plate 12.

[0039] Specifically, the fixed contact plate 6 contacts and connects with the metal plate on the side of the movable contact plate 12 to conduct testing.

[0040] Furthermore, a groove 13 is provided on the mounting plate 5, and a slider 14 is slidably arranged in the groove 13. A protrusion is provided on the upper end of the slider 14. A servo push rod 21 is fixedly connected to the mounting plate 5, and the servo push rod 21 is fixedly connected to the protrusion provided on the upper end of the slider 14.

[0041] Specifically, the groove 13 provides linear guidance for the slider 14.

[0042] Furthermore, a second elastic spring 20 is fixedly connected to the side of the movable plate 19, and the other end of the second elastic spring 20 is fixedly connected to the movable clamping plate 17. A protrusion is connected to the side of the movable clamping plate 17, and the protrusion is connected to the upper surface of the slider 14.

[0043] Specifically, the second spring 20 provides elastic buffer for the moving clamp 17. When the clamping force exceeds the preset value (such as when the battery diameter is too large), the second spring 20 can be compressed and deformed to avoid damage to the clamp or battery caused by rigid transmission.

[0044] Working principle:

[0045] First, the operator places the cylindrical lithium battery between the first rubber pad 16 of the fixed clamping plate 15 and the second rubber pad 18 of the movable clamping plate 17. The servo push rod 21 is activated, pushing the slider 14 in the slide groove 13 to slide. The slider 14 drives the protrusion on the side of the movable clamping plate 17 through the upper protrusion, so that the movable clamping plate 17 moves closer to the fixed clamping plate 15. The second elastic spring 20 provides elastic clamping force, which, together with the buffering effect of the first rubber pad 16 and the second rubber pad 18, firmly clamps the lithium battery. The servo motor 4 drives the rotating roller 3 to rotate, which drives the mounting plate 5 with the lithium battery installed to rotate to the test station. At this time, the mounting plate 5 is flush with the fixed contact plate 6 inside the housing 1. The electrodes on the movable contact plate 12 are in contact with the lithium battery motor. The metal plate on the side of the movable contact plate 12 is in contact with the metal fixed contact plate 6. The telescopic end of the electric push rod 7 pushes the inner contact plate 8 to move, so that the electrodes on the inner contact plate 8 are in contact with the electrodes of the lithium battery. The electrodes are connected to the lithium battery and the testing mechanism 2 through cables. The testing mechanism 2 starts the constant voltage and constant current test process. After the test is completed, the servo push rod 21 moves in the opposite direction, pulling the slider 14 back along the slide groove 13. The movable clamping plate 17 and the fixed clamping plate 15 move away from each other. Once the clamping force is released, the lithium battery automatically falls off after losing its limit, completing the unloading process. Subsequently, the rotating roller 3 can drive the next set of mounting plates 5 into the testing station to achieve continuous testing. Only manual placement of the lithium battery between the first rubber pad 16 and the second rubber pad 18 is required. Subsequent clamping (servo push rod 21 drives slider 14 to move clamping plate 17), station switching (servo motor 4 drives rotating roller 3 to rotate mounting plate 5), electrode docking (electric push rod 7 pushes inner contact plate 8), and unloading (servo push rod 21 pulls slider 14 in the opposite direction to release the battery) are all completed automatically. Thus, the entire workflow ends.

[0046] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0049] For those skilled in the art, various changes, modifications, substitutions, and alterations to these embodiments without departing from the principles and spirit of this utility model will still fall within the protection scope of this utility model.

Claims

1. A lithium battery constant voltage and constant current automatic switching test device based on MCU, comprising a housing (1), wherein a test mechanism (2) is mounted on the housing (1), characterized in that: A rotating roller (3) is rotatably connected inside the housing (1). A servo motor (4) is installed on the side of the housing (1). The transmission shaft of the servo motor (4) is connected to the shaft of the rotating roller (3). Several mounting plates (5) are connected to the side of the rotating roller (3). Several fixed clamping plates (15) are connected to the mounting plates (5). A fixed plate (9) is connected to the mounting plates (5). A movable contact plate (12) is elastically provided on the side of the fixed plate (9). The length direction of the movable contact plate (12) is perpendicular to the length direction of the fixed clamping plate (15). An electric push rod (7) is installed inside the housing (1). The telescopic end of the electric push rod (7) is connected to the inner contact plate (8). Several electrodes are connected to the inner contact plate (8). Each electrode corresponds to the position between the fixed clamping plate (15) and the movable clamping plate (17). Each electrode is connected to the testing mechanism (2) through a cable. A movable plate (19) is slidably disposed on the mounting plate (5), and a movable clamping plate (17) is elastically disposed on the side of the movable plate (19).

2. The MCU-based lithium battery constant voltage and constant current automatic switching test device according to claim 1, characterized in that: The fixed clamp (15) is fixedly connected to a first rubber pad (16) on its side, and the first rubber pad (16) has a groove on the side facing the movable clamp (17).

3. The MCU-based lithium battery constant voltage and constant current automatic switching test device according to claim 1, characterized in that: The movable clamp (17) is fixedly connected to a second rubber pad (18) on its side, and the second rubber pad (18) has a groove on the side facing the fixed clamp (15).

4. The MCU-based lithium battery constant voltage and constant current automatic switching test device according to claim 1, characterized in that: A first elastic spring (10) is fixedly connected to the side of the fixed plate (9), and the other end of the first elastic spring (10) is fixedly connected to the movable contact plate (12). A connecting rod (11) is slidably arranged on the fixed plate (9), and the other end of the connecting rod (11) is fixedly connected to the movable contact plate (12). The connecting rod (11) has a "T" shaped structure. The movable contact plate (12) is connected to several electrodes, and each electrode corresponds to the position between the fixed clamp (15) and the movable clamp (17). Several metal plates are provided on the side of the movable contact plate (12), and each electrode is connected to each metal plate through a circuit.

5. The MCU-based lithium battery constant voltage and constant current automatic switching test device according to claim 4, characterized in that: A fixed contact plate (6) is fixedly connected inside the housing (1); The fixed contact plate (6) is made of metal and is grounded through a ground wire. When the fixed contact plate (6) is flush with the mounting plate (5), the fixed contact plate (6) contacts the metal plate on the side of the movable contact plate (12).

6. The MCU-based lithium battery constant voltage and constant current automatic switching test device according to claim 1, characterized in that: The mounting plate (5) is provided with a sliding groove (13), and a slider (14) is slidably arranged in the sliding groove (13). A protrusion is provided at the upper end of the slider (14). A servo push rod (21) is fixedly connected to the mounting plate (5), and the servo push rod (21) is fixedly connected to the protrusion provided at the upper end of the slider (14).

7. The MCU-based lithium battery constant voltage and constant current automatic switching test device according to claim 6, characterized in that: A second elastic spring (20) is fixedly connected to the side of the movable plate (19), and the other end of the second elastic spring (20) is fixedly connected to the movable clamping plate (17). A protrusion is connected to the side of the movable clamping plate (17), and the protrusion is connected to the upper surface of the slider (14).

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