Charging and discharging testing device of lithium battery

Abstract

The utility model discloses a charging and discharging testing device for a lithium battery. The charging and discharging testing device comprises a first testing platform; a testing device is arranged on the first testing platform, a fixing device is arranged on the testing device, a second testing platform is arranged below the first testing platform, the testing device comprises an outer mounting box, the outer mounting box is mounted on the first testing platform, an inner testing box is mounted in the outer mounting box, and a vibrator is mounted below the first testing platform; according to the utility model, the internal test box is used for placing the battery pack, the battery pack is connected with charging and discharging equipment, the vibrator below the external installation box is used for generating vibration, the battery pack is subjected to charging and discharging test in a continuous vibration environment, and if overload or circuit break occurs, the circuit breaker works to cut off a circuit, so that the test safety is improved; through cooperation of the first fixing plate and the second fixing plate, battery packs of different sizes can be clamped, the situation that the battery packs are too small and collide in the test box is avoided, the application range is widened, and the battery packs of more sizes can be tested.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing equipment, and particularly relates to a charge and discharge testing device for lithium batteries. Background Art

[0002] A charge and discharge testing device for a lithium battery pack with the publication number of CN218866057U includes a vibration assembly, and the vibration assembly includes a vibration box, vibration springs and a vibrator; a vibrator and vibration springs are arranged on the inner bottom surface of the vibration box; a testing assembly, and the testing assembly is located outside the vibration box; the testing assembly includes a controller and a charge and discharge module; the charge and discharge module is electrically connected to the controller; a wire of the charge and discharge module is inserted and connected to the lithium battery pack in a pluggable manner. When the utility model is used, a vibration type charge and discharge test is carried out on the lithium battery pack, effectively improving the ex-factory quality of the lithium battery pack. The vibrator and the vibration springs drive the vibration of the lithium battery pack in the vibration box, and at the same time, the controller and the charge and discharge module carry out charge and discharge tests on the lithium battery pack to realize the vibration type charge and discharge test of the lithium battery pack.

[0003] The vibration box of the above device for testing cannot be disassembled and the internal space size cannot be adjusted, and it can only be used to test welded battery packs of a single size, with narrow applicability. Moreover, the device conducts vibration tests during the charge and discharge of the battery, and the device has no safety protection device, with relatively high danger. Therefore, a charge and discharge testing device for lithium batteries is needed to meet people's needs. Content of the Utility Model

[0004] The purpose of the utility model is to provide a charge and discharge testing device for lithium batteries to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A charge and discharge testing device for lithium batteries, including a first test platform; a testing device is arranged on the first test platform, a fixing device is arranged on the testing device, and a second test platform is arranged below the first test platform;

[0006] Preferably, the testing device includes an outer installation box, the outer installation box is installed on the first test platform, an inner test box is installed in the outer installation box, a vibrator is installed below the first test platform, a controller is installed on the first test platform, a charge and discharge device is installed on one side of the controller, and a circuit breaker is installed on one side of the charge and discharge device.

[0007] Preferably, the fixing device includes a first fixing plate, the first fixing plate is installed in the inner test box, a first moving block is installed on the first fixing plate, a first lead screw is installed on the first moving block, a second fixing plate is installed on one side of the first fixing plate, a second moving block is installed on the second fixing plate, and a second lead screw is installed on the second moving block.

[0008] Preferably, a groove is formed on one lateral side of the first test platform, and the first lead screw is installed in the groove. Another groove is formed on one vertical side of the first test platform, and a second lead screw is installed in the groove.

[0009] Preferably, a first spring is installed in the outer mounting box and is connected to the inner test box. Fixed shafts are installed on both sides of the first test platform, and a fixed seat is installed on the first test platform. The fixed shafts are installed on the fixed seat, and a telescopic rod is installed below the outer mounting box.

[0010] Preferably, holes are formed in the fixed seat, and the fixed shafts are installed in the holes.

[0011] Preferably, a second spring is installed between the first test platform and the second test platform, and a damper is installed inside the second spring. Support legs are installed below the second test platform, and brake universal wheels are installed on the support legs.

[0012] Preferably, a safety cover slot is formed on the first test platform, and a safety cover is installed in the safety cover slot.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] (1) In the present utility model, a battery pack is placed through the inner test box, and the battery pack is connected to a charge and discharge device. Vibration is generated by a vibrator below the outer mounting box, and the battery pack undergoes charge and discharge tests in a continuously vibrating environment. When overload or open circuit occurs, the circuit breaker operates to cut off the circuit, improving the test safety. By utilizing the cooperation of the first fixing plate and the second fixing plate, battery packs of different sizes can be clamped, preventing the battery pack from colliding randomly in the test box due to being too small, expanding its scope of application, and enabling tests on more battery packs of different sizes.

[0015] (2) Protection is provided through the safety cover above the first test platform to prevent accidental explosion of the battery during testing, which can play a certain protective role. By arranging a second spring and a damper below the first test platform, a buffering effect can be achieved on the first test platform, preventing excessive impact force generated during vibration from damaging the main body of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a three-dimensional structural schematic diagram of a charge and discharge test device for a lithium battery proposed by the present utility model;

[0017] Figure 2 FIG. is a structural schematic diagram of the first test platform, the second test platform and other structures of a charge and discharge test device for a lithium battery proposed by the present utility model;

[0018] Figure 3Schematic diagram of the structure of the outer installation box, inner test box and other structures of a charge and discharge test device for a lithium battery proposed by the present utility model;

[0019] Figure 4 Schematic diagram of the structure of the outer installation box, vibrator and other structures of a charge and discharge test device for a lithium battery proposed by the present utility model;

[0020] Figure 5 Schematic diagram of the structure of the first fixing plate, second fixing plate and other structures of a charge and discharge test device for a lithium battery proposed by the present utility model.

[0021] In the figure: 1. First test platform; 2. Test device; 3. Fixing device; 4. Second test platform; 5. Second spring; 6. Support leg; 7. Brake universal wheel; 8. Damper; 9. Safety cover slot; 10. Safety cover; 20. Outer installation box; 21. Inner test box; 22. First spring; 23. Vibrator; 24. Controller; 25. Charge and discharge equipment; 26. Circuit breaker; 27. Fixed shaft; 28. Fixed seat; 29. Telescopic rod; 30. First fixing plate; 31. Second fixing plate; 32. First moving block; 33. Second moving block; 34. First lead screw; 35. Second lead screw. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1: Please refer to Figures 1-5 , the present utility model provides a technical solution: A charge and discharge test device for a lithium battery, including a first test platform 1; in order to expand the scope of application and test safety, a test device 2 is provided on the first test platform 1, a fixing device 3 is provided on the test device 2, and a second test platform 4 is provided below the first test platform 1. The test is carried out through the test device 2, and the battery pack is fixed through the fixing device 3;

[0024] To achieve the function of expanding the scope of application, the test device 2 includes an outer installation box 20, which is installed on the first test platform 1. An inner test box 21 is installed inside the outer installation box 20. A vibrator 23 is installed below the first test platform 1. A controller 24 is installed on the first test platform 1. A charge and discharge device 25 is installed on one side of the controller 24. A circuit breaker 26 is installed on one side of the charge and discharge device 25. The fixing device 3 includes a first fixing plate 30, which is installed inside the inner test box 21. A first moving block 32 is installed on the first fixing plate 30. A first lead screw 34 is installed on the first moving block 32. A second fixing plate 31 is installed on one side of the first fixing plate 30. A second moving block 33 is installed on the second fixing plate 31. A second lead screw 35 is installed on the second moving block 33. A groove is opened on the lateral side of the first test platform 1, and the first lead screw 34 is installed in the groove. Another groove is opened on the vertical side of the first test platform 1, and the second lead screw 35 is installed in the groove. A first spring 22 is installed inside the outer installation box 20, and the first spring 22 is connected to the inner test box 21. Fixed shafts 27 are installed on both sides of the first test platform 1. A fixed seat 28 is installed on the first test platform 1, and the fixed shafts 27 are installed on the fixed seat 28. A telescopic rod 29 is installed below the outer installation box 20. A hole is opened on the fixed seat 28, and the fixed shafts 27 are installed in the holes. Place the battery pack inside the inner test box 21. Rotate the first lead screw 34. When the first lead screw 34 rotates, it drives the first moving block 32 to move. When the first moving block 32 moves, it drives the first fixing plate 30 to move, so that the two first fixing plates 30 approach each other until the surface of the first fixing plate 30 clamps the surface of the battery pack. Then rotate the second lead screw 35. When the second lead screw 35 rotates, it drives the second moving block 33 to move. When the second moving block 33 moves, it drives the second fixing plate 31 to move until the surface of the second fixing plate 31 clamps the surface of the battery pack. After fixing the battery pack, connect the battery pack to the charge and discharge device 25. Start the controller 24. The controller 24 generates vibrations, causing the battery pack above to shake continuously. The charge and discharge device 25 charges and discharges the battery pack frequently. The controller 24 continuously detects the voltage, current, etc. of the battery pack to determine the welding condition inside the battery pack. If the battery pack is overloaded or a circuit break occurs, the circuit breaker 26 is activated to cut off the current and protect the battery pack.

[0025] The working principle is as follows: Place the battery pack inside the inner test box 21. Rotate the first lead screw 34. When the first lead screw 34 rotates, it drives the first moving block 32 to move. When the first moving block 32 moves, it drives the first fixed plate 30 to move, causing the two first fixed plates 30 to approach each other until the surface of the first fixed plate 30 clamps the surface of the battery pack. Subsequently, rotate the second lead screw 35. When the second lead screw 35 rotates, it drives the second moving block 33 to move. When the second moving block 33 moves, it drives the second fixed plate 31 to move until the surface of the second fixed plate 31 clamps the surface of the battery pack. After fixing the battery pack, connect the battery pack to the charge and discharge device 25, snap the safety cover 10 into the safety cover slot 9, and start the controller 24. The controller 24 generates vibrations, causing the upper battery pack to shake continuously. The charge and discharge device 25 charges and discharges the battery pack frequently, and the controller 24 continuously detects the voltage, current, etc. of the battery pack to determine the welding condition inside the battery pack. If the battery pack is overloaded or an open circuit occurs, the circuit breaker 26 is activated to cut off the current and protect the battery pack. If a micro-explosion or smoking and fire accidentally occur, the safety cover 10 can play a certain protective role, preventing the micro-explosion fragments from splashing or preventing the toxic gases generated by the battery combustion, playing a certain safety protection role. The second spring 5 and the damper 8 below the first test platform 1 can play a certain buffering role, which can play a certain buffering role to avoid excessive impact force when the vibrator 23 vibrates. At the same time, the brake universal wheel 7 is used to facilitate movement, and the brake universal wheel 7 comes with a brake pad and can be limited when not in use.

[0026] Embodiment 2: As Figures 1-2 , in order to improve the safety of the device, a second spring 5 is installed between the first test platform 1 and the second test platform 4. A damper 8 is installed inside the second spring 5. Support legs 6 are installed below the second test platform 4. Brake universal wheels 7 are installed on the support legs 6. A safety cover slot 9 is opened on the first test platform 1. A safety cover 10 is installed in the safety cover slot 9. Snap the safety cover 10 into the safety cover slot 9. If a micro-explosion or smoking and fire accidentally occur, the safety cover 10 can play a certain protective role, preventing the micro-explosion fragments from splashing or preventing the toxic gases generated by the battery combustion, playing a certain safety protection role. The second spring 5 and the damper 8 below the first test platform 1 can play a certain buffering role, which can play a certain buffering role to avoid excessive impact force when the vibrator 23 vibrates. At the same time, the brake universal wheel 7 is used to facilitate movement, and the brake universal wheel 7 comes with a brake pad and can be limited when not in use. The other features are the same as those in Embodiment 1.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A charge and discharge test device for a lithium battery, comprising a first test platform (1); characterized in that: A testing device (2) is provided on the first testing platform (1), a fixing device (3) is provided on the testing device (2), and a second testing platform (4) is provided below the first testing platform (1). The testing device (2) includes an outer installation box (20), the outer installation box (20) is installed on the first testing platform (1), an inner testing box (21) is installed inside the outer installation box (20), a vibrator (23) is installed below the first testing platform (1), a controller (24) is installed on the first testing platform (1), a charge and discharge device (25) is installed on one side of the controller (24), and a circuit breaker (26) is installed on one side of the charge and discharge device (25).

2. The charge and discharge test device for a lithium battery according to claim 1, wherein: The fixing device (3) includes a first fixing plate (30), the first fixing plate (30) is installed inside the inner testing box (21), a first moving block (32) is installed on the first fixing plate (30), a first lead screw (34) is installed on the first moving block (32), a second fixing plate (31) is installed on one side of the first fixing plate (30), a second moving block (33) is installed on the second fixing plate (31), and a second lead screw (35) is installed on the second moving block (33).

3. The charge and discharge test device for a lithium battery according to claim 2, characterized in that: A groove is formed on the lateral side of the first testing platform (1), the first lead screw (34) is installed in the groove, another groove is formed on the vertical side of the first testing platform (1), and the second lead screw (35) is installed in the groove.

4. The charge and discharge test device for a lithium battery according to claim 1, characterized in that: A first spring (22) is installed inside the outer installation box (20), the first spring (22) is connected to the inner testing box (21), fixing shafts (27) are installed on both sides of the first testing platform (1), a fixing seat (28) is installed on the first testing platform (1), the fixing shafts (27) are installed on the fixing seat (28), and a telescopic rod (29) is installed below the outer installation box (20).

5. The charge and discharge test device for a lithium battery according to claim 4, characterized in that: A hole is formed on the fixing seat (28), and the fixing shaft (27) is installed in the hole.

6. The charge and discharge test device for a lithium battery according to claim 1, wherein: A second spring (5) is installed between the first testing platform (1) and the second testing platform (4), a damper (8) is installed inside the second spring (5), support legs (6) are installed below the second testing platform (4), and brake universal wheels (7) are installed on the support legs (6).

7. The charge and discharge test device for a lithium battery according to claim 1, characterized in that: A safety cover slot (9) is formed on the first testing platform (1), and a safety cover (10) is installed in the safety cover slot (9).

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