A charging and discharging test device for retired power batteries

Abstract

The present invention relates to the technical field of battery detection equipment, and discloses a retired power battery charge and discharge test device, comprising an explosion-proof box and a test mechanism for performing charge and discharge tests on the power battery, wherein the top wall of the explosion-proof box is provided with an opening, and a test bench is rotatably installed in the opening; the present invention drives the test bench to rotate through a driving mechanism, so that the power battery is flipped into the explosion-proof box, and then the power battery is charged and discharged through the test mechanism. During the charge and discharge test, another retired power battery is placed on a fixing mechanism on the other side of the test bench to improve the test efficiency. After the test is completed, the test bench is rotated in the opposite direction, so that another retired power battery enters the explosion-proof box for testing. Under the explosion-proof effect of the explosion-proof box, even if the retired power battery explodes during the test, the fragments generated by the explosion will be blocked by the explosion-proof box and the test bench, and will not cause harm to the tester and the test mechanism, and the safety during the test is high.

Description

Technical Field

[0001] The present invention relates to the technical field of battery testing equipment, and in particular to a charging and discharging testing device for retired power batteries. Background Art

[0002] A power battery is a power source that provides power for tools, mostly referring to batteries that power electric vehicles, electric trains, electric bicycles, and golf carts. It includes valve-sealed lead-acid batteries, open tubular lead-acid batteries, and lithium iron phosphate batteries. The cascade utilization of retired power batteries is an effective way to maximize the exploration and application of power battery performance as much as possible, which can reduce the waste of battery value and energy resources and possible pollution. Application in different scenarios can maximize the benefits of battery application, while reducing production and utilization costs, promoting the development of upstream battery production and manufacturing and downstream battery sales and recycling industries, and contributing to the promotion of a circular economy. It meets the needs of my country's economic and social sustainable development and has high development potential and application prospects. Retired power batteries need to be tested for their charging and discharging capabilities to detect their safety performance.

[0003] Chinese invention patent CN207662939U discloses an automatic charging and discharging test mechanism for a power battery pack, which is used to perform charging and discharging tests on a power battery pack. The automatic charging and discharging test mechanism for a power battery pack includes a tray, a placement plate, at least one transfer plug arranged on the placement plate, and a test device. The transfer plug includes at least one fixed plug, and at least one flexible plug assembly. Each of the flexible plug assemblies includes a flexible wire electrically connected to the fixed plug, and a battery plug electrically connected to the flexible wire. The test device includes a test machine plug corresponding to the fixed plug and directly electrically connected to the fixed plug. Due to the setting of the transfer plug, the automatic charging and discharging test mechanism for a power battery pack only needs to connect the flexible plug assembly of the transfer plug with the power battery pack, thereby saving manpower waste.

[0004] However, the test device directly places the retired power batteries on the placement plate for charge and discharge testing. Since the usage status of the retired power batteries is unclear, some batteries may explode during the charge and discharge process. If the power batteries are not protected during the test, the explosion may cause injury to the test personnel or damage to the test device.

[0005] Therefore, it is necessary to provide a retired power battery charging and discharging test device to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a retired power battery charge and discharge test device to solve the problem that when the existing retired power battery charge and discharge test device in the above background technology is testing the battery, the battery explosion may easily cause injury to the tester and damage to the test device.

[0007] To achieve the above purpose, it is necessary to protect the power battery during the test process to prevent the fragments generated when the power battery explodes from splashing out and causing injuries to the test personnel and damage to the test equipment.

[0008] Based on the above ideas, the present invention provides the following technical solutions: a retired power battery charge and discharge test device, comprising an explosion-proof box and a test mechanism for performing charge and discharge tests on the power battery, the top wall of the explosion-proof box is provided with an opening, a test bench is rotatably installed in the opening, the test bench is rotatably connected to the explosion-proof box through a rotating shaft, the top and bottom ends of the test bench are provided with fixing mechanisms for clamping the power battery, and the explosion-proof box is provided with a driving mechanism for driving the rotating shaft to rotate.

[0009] As a further solution of the present invention, the driving mechanism includes a support frame, the support frame is fixedly mounted on the side wall of the explosion-proof box, the rotating shaft is rotatably connected to the support frame, a first gear is mounted on the rotating shaft, a motor is fixedly mounted on the top wall of the explosion-proof box, a second gear is fixedly mounted on the output end of the motor, and the first gear is meshed with the second gear.

[0010] As a further solution of the present invention, reinforcement mechanisms are provided on two opposite sides of the explosion-proof box, and the reinforcement mechanisms include an electric push rod, a slide plate and a sealing plate. The electric push rod is fixedly mounted on the side wall of the explosion-proof box, and the slide plate is slidably mounted at the opening of the explosion-proof box. The output end of the electric push rod is fixedly connected to the slide plate, and a sealing plate is fixedly mounted on one end of the slide plate away from the electric push rod, and a reinforcement plate is fixedly mounted on a side of the sealing plate away from the electric push rod. Grooves are provided on two opposite side walls of the test bench, and the reinforcement plates are adapted to the grooves.

[0011] As a further solution of the present invention, the fixing mechanism includes a vertical plate and a fixing cover, the vertical plate is fixedly installed on one side of the top of the test bench, the fixing cover is arranged in an L shape, and the side wall of the fixing cover is rotatably connected to the other side of the top of the test bench, the fixing cover and the vertical plate are connected by a snap-fit, and a mounting plate is slidably installed on the top of the test bench, the mounting plate and the vertical plate are arranged parallel to each other, and two conductive mechanisms are detachably installed on the mounting plate, and the two conductive mechanisms are respectively electrically connected to the positive and negative poles of the test mechanism through connecting mechanisms.

[0012] As a further solution of the present invention, the conductive mechanism includes a base plate, a conductive sheet is fixedly mounted on the base plate, a plurality of mounting holes are formed on the mounting plate, the base plate is detachably connected to the mounting plate via fixing bolts, and the fixing bolts are threadedly connected to the mounting holes.

[0013] As a further solution of the present invention, a guide rail is fixedly installed on the test bench, a slide seat is slidably installed on the guide rail, the slide seat is fixedly connected to the mounting plate, and a locking bolt for locking the slide seat is provided on the slide seat.

[0014] As a further solution of the present invention, the connecting mechanism includes a mounting shell, the mounting shell is fixedly connected to the support frame, one end of the rotating shaft extends into the mounting shell, and the rotating shaft is rotatably connected to the mounting shell, a first conductive cylinder and a first conductive column are fixedly installed on the side of the inner cavity of the mounting shell away from the rotating shaft, the first conductive column is located inside the first conductive cylinder, the first conductive cylinder and the first conductive column are electrically connected to the positive and negative poles of the testing mechanism respectively through two second wires, a second conductive cylinder and a second conductive column are fixedly installed on one end of the rotating shaft extending into the mounting shell, the second conductive column is located inside the first conductive cylinder, the first conductive cylinder is electrically connected to the second conductive cylinder, and the first conductive cylinder and the second conductive cylinder column are rotatably matched, the first conductive column and the second conductive column are electrically connected, and the first conductive column and the second conductive column are rotatably matched, the second conductive cylinder and the second conductive column are electrically connected, and the first conductive column and the second conductive column are electrically connected to the two conductive sheets respectively through two first wires, and the first conductive cylinder, the first conductive column, the second conductive cylinder and the second conductive column are coaxially arranged.

[0015] As a further solution of the present invention, a threading channel is provided inside the test bench, the rotating shaft is hollow, the first wire passes through the inner cavity of the rotating shaft, the threading channel and the mounting hole in sequence, and is electrically connected to the conductive sheet.

[0016] As a further solution of the present invention, a rubber pad is fixedly mounted on the side wall of the fixing cover opposite to the mounting plate, and the power battery can be better fixed under the squeezing effect of the rubber pad.

[0017] As a further solution of the present invention, an annular groove is provided on the first conductive tube, the second conductive tube is inserted into the annular groove, the second conductive tube is in contact with the inner wall of the annular groove, and a circular groove is provided on the first conductive column, the second conductive column is inserted into the circular groove, and the second conductive column is in contact with the inner wall of the circular groove, so that the connection between the first conductive tube and the second conductive tube and the first conductive column and the second conductive column is tighter, and the stability of the electrical connection is maintained.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: during testing, the present invention clamps the retired power battery in a fixing mechanism, and then drives the test bench to rotate through a driving mechanism, so that the power battery is flipped into an explosion-proof box, and then the power battery is subjected to a charge and discharge test through the test mechanism. During the charge and discharge test, another retired power battery is placed on the fixing mechanism on the other side of the test bench to improve the test efficiency. After the test is completed, the test bench is rotated in the opposite direction to allow another retired power battery to enter the explosion-proof box for testing. Under the explosion-proof effect of the explosion-proof box, even if the retired power battery explodes during the test, the fragments produced by the explosion will be blocked by the explosion-proof box and the test bench, and will not cause harm to the tester and the test organization, and the safety during the test is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention when the fixed cover is opened;

[0021] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the explosion-proof box and the test bench of the present invention;

[0023] Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the test bench and the fixing mechanism of the present invention;

[0025] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure at B;

[0026] Figure 8 It is a schematic cross-sectional structure diagram of the test bench and the fixing mechanism of the present invention;

[0027] Fig. 9 It is a schematic diagram of the explosion structure of the connecting mechanism of the present invention;

[0028] Fig.10 It is a schematic cross-sectional structure diagram of the connecting mechanism of the present invention.

[0029] In the figure: 1, explosion-proof box; 2, test bench; 201, groove; 202, threading channel; 3, rotating shaft; 4, driving mechanism; 41, first gear; 42, motor; 43, second gear; 5, vertical plate; 6, fixing cover; 7, buckle; 8, rubber pad; 9, mounting plate; 901, mounting hole; 10, bottom plate; 11, conductive sheet; 12, fixing bolt; 13, guide rail; 14, slide seat; 15, locking bolt; 16, first wire; 17, electric push rod; 18, slide plate; 19, sealing plate; 20, reinforcement plate; 21, support frame; 22, second wire; 23, mounting shell; 24, first conductive cylinder; 2401, annular groove; 25, first conductive column; 2501, circular groove; 26, second conductive cylinder; 27, second conductive column. DETAILED DESCRIPTION

[0030] See also Figures 1 to 5 In an embodiment of the present invention, a retired power battery charge and discharge test device includes an explosion-proof box 1 and a test mechanism for performing charge and discharge tests on the power battery. It can be understood that the test mechanism also includes some other functional modules, such as a switch module, a power module, etc., which are technologies well known to those skilled in the art and will not be described in detail one by one herein. The top wall of the explosion-proof box 1 is provided with an opening, and a test bench 2 is rotatably installed in the opening. The test bench 2 is rotatably connected to the explosion-proof box 1 through a rotating shaft 3. The top and bottom ends of the test bench 2 are both provided with a fixing mechanism for clamping the power battery. The test mechanism is electrically connected to the power battery clamped in the fixing mechanism. The explosion-proof box 1 is provided with a driving shaft. 3 rotating driving mechanism 4; during the test, the retired power battery is clamped in the fixing mechanism, and then the driving mechanism 4 drives the test bench 2 to rotate, so that the power battery is turned over to the explosion-proof box 1, and then the power battery is charged and discharged through the testing mechanism. During the charge and discharge test, another retired power battery is placed on the fixing mechanism on the other side of the testing bench 2 to improve the test efficiency. After the test is completed, the test bench 2 is rotated in the opposite direction to make another retired power battery enter the explosion-proof box 1 for testing. Under the explosion-proof effect of the explosion-proof box 1, even if the retired power battery explodes during the test, the fragments generated by the explosion will be blocked by the explosion-proof box 1 and the testing bench 2, and will not cause harm to the testers and the testing organization, and the safety during the test is relatively high.

[0031] In this embodiment, preferably, the driving mechanism 4 includes a support frame 21, the support frame 21 is fixedly mounted on the side wall of the explosion-proof box 1, the rotating shaft 3 is rotatably connected to the support frame 21, the rotating shaft 3 is provided with a first gear 41, and a motor 42 is fixedly mounted on the top wall of the explosion-proof box 1, the motor 42 is a forward and reverse motor 42, and a second gear 43 is fixedly mounted on the output end of the motor 42, and the first gear 41 is meshed with the second gear 43; during testing, the second gear 43 is driven to rotate by the output end of the motor 42, thereby driving the rotating shaft 3 to rotate through the first gear 41, and the rotating shaft 3 drives the test bench 2 to rotate 180°, so that the power battery is flipped into the explosion-proof box 1.

[0032] In this embodiment, preferably, two opposite sides of the explosion-proof box 1 are provided with reinforcement mechanisms, and the reinforcement mechanisms include an electric push rod 17, a slide plate 18 and a sealing plate 19. The electric push rod 17 is fixedly installed on the side wall of the explosion-proof box 1, and the slide plate 18 is slidably installed at the opening of the explosion-proof box 1. The output end of the electric push rod 17 is fixedly connected to the slide plate 18, and the end of the slide plate 18 away from the electric push rod 17 is fixedly installed with a sealing plate 19, and the side of the sealing plate 19 away from the electric push rod 17 is fixedly installed with a reinforcement plate 20. Grooves 201 are provided on both opposite side walls of the test bench 2, and the reinforcement plate 20 is adapted to the grooves 201 so that the reinforcement plate 20 can be inserted into the grooves 201; after the power battery is flipped into the explosion-proof box 1, the electric push rod 17 drives the slide plate 18 to move toward the test bench 2, thereby driving the sealing plate 19 to move toward the test bench 2, so that the reinforcement plate 20 is inserted into the groove 201. Under the limiting and sealing action of the reinforcement plate 20, even if an explosion occurs in the explosion-proof box 1, the impact force of the explosion will hardly push the test bench 2 to rotate, thereby playing a reinforcement role.

[0033] See also Figures 2 to 7In the embodiment of the present invention, the fixing mechanism includes a vertical plate 5 and a fixing cover 6. The vertical plate 5 is fixedly installed on one side of the top end of the test bench 2, or one side of the bottom end. The fixing cover 6 is set to be L-shaped, and the side wall of the fixing cover 6 is rotatably connected to the other side of the top end of the test bench 2, or the other side of the bottom end. The fixing cover 6 is connected to the vertical plate 5 by a snap 7. A receiving cavity for receiving a power battery is formed between the vertical plate 5, the fixing cover 6 and the test bench 2. A mounting plate 9 is slidably installed on the top end of the test bench 2. The mounting plate 9 and the vertical plate 5 are arranged parallel to each other. Two conductive mechanisms are detachably installed on the mounting plate 9. The two conductive mechanisms Through the connecting mechanism, they are electrically connected to the positive and negative electrodes of the test mechanism respectively, and the two conductive mechanisms are electrically connected to the positive and negative electrodes of the power battery respectively; according to the size of the battery, the mounting plate 9 is slid so that the mounting plate 9 and the rubber pad 8 can clamp the power battery, and then the position of the conductive sheet 11 is adjusted by removing the bottom plate 10 and changing the mounting position, so that the two conductive sheets 11 are respectively arranged opposite to the positive and negative electrodes of the power battery, so that after the power battery is clamped, the positive and negative electrodes of the power battery are just in contact with the two conductive sheets 11 respectively, and then the power battery is placed on the test bench 2, and then the fixing cover 6 is covered, and the fixing cover 6 is fixedly connected to the vertical plate 5 by the buckle 7.

[0034] In this embodiment, preferably, the conductive mechanism includes a base plate 10, on which a conductive sheet 11 is fixedly mounted, the conductive sheet 11 is electrically connected to the positive / negative poles of the power battery, a plurality of mounting holes 901 are provided on the mounting plate 9, the base plate 10 is detachably connected to the mounting plate 9 via fixing bolts 12, and the fixing bolts 12 are threadedly connected to the mounting holes 901; so that the position of the conductive sheet 11 can be adjusted, so that the two conductive sheets 11 are respectively arranged opposite to the positive and negative poles of the power battery.

[0035] In this embodiment, preferably, a guide rail 13 is fixedly installed on the test bench 2, a slide seat 14 is slidably installed on the guide rail 13, the slide seat 14 is fixedly connected to the mounting plate 9, and a locking bolt 15 for locking the slide seat 14 is provided on the slide seat 14. The bottom end of the locking bolt 15 passes through the slide seat 14 and is pressed on the top wall of the guide rail 13. The locking bolt 15 is threadedly connected to the slide seat 14. The slide seat 14 can be locked by tightening the locking bolt 15 to prevent it from sliding.

[0036] In this embodiment, preferably, a rubber pad 8 is fixedly mounted on the side wall of the fixing cover 6 opposite to the mounting plate 9 , and the power battery can be better fixed under the squeezing effect of the rubber pad 8 .

[0037] See also Figure 1 and Figures 8 to 10In the embodiment of the present invention, the connecting mechanism includes a mounting shell 23, the mounting shell 23 is fixedly connected to the support frame 21, one end of the rotating shaft 3 extends into the mounting shell 23, and the rotating shaft 3 is rotatably connected to the mounting shell 23, a first conductive cylinder 24 and a first conductive column 25 are fixedly installed on the side of the inner cavity of the mounting shell 23 away from the rotating shaft 3, the first conductive column 25 is located inside the first conductive cylinder 24, the first conductive cylinder 24 and the first conductive column 25 are respectively electrically connected to the positive and negative poles of the test mechanism through two second wires 22, a second conductive cylinder 26 and a second conductive column 27 are fixedly installed on one end of the rotating shaft 3 extending into the mounting shell 23, the second conductive column 27 is located inside the first conductive cylinder 24, the first conductive cylinder 24 is electrically connected to the second conductive cylinder 26, and the first conductive cylinder 24 and the second conductive cylinder 26 are rotatably matched, the first conductive column 25 and the second conductive column 27 is electrically connected, and the first conductive column 25 and the second conductive column 27 are rotatably matched, the second conductive column 26 and the second conductive column 27 are electrically connected to the two conductive sheets 11 respectively through the two first wires 16, and the first conductive column 24, the first conductive column 25, the second conductive column 26 and the second conductive column 27 are coaxially arranged; under the action of the connecting mechanism, the electrical connection between the test mechanism and the conductive sheet 11 will not be affected when the rotating shaft 3 rotates, and when the rotating shaft 3 rotates, the second conductive column 26 and the second conductive column 27 are driven to rotate, because the first conductive column 24 and the second conductive column 26 are rotatably connected, the first conductive column 25 and the second conductive column 27 are rotatably connected, and the first conductive column 24 and the second conductive column 26 are electrically connected, and the first conductive column 25 and the second conductive column 27 are electrically connected, so that even if the rotating shaft 3 rotates relative to the mounting shell 23, the electrical connection between the test mechanism and the conductive sheet 11 will not be affected.

[0038] In this embodiment, preferably, a threading channel 202 is opened inside the test bench 2, and the rotating shaft 3 is hollow. The first wire 16 passes through the inner cavity of the rotating shaft 3, the threading channel 202 and the mounting hole 901 in sequence, and is electrically connected to the conductive sheet 11, thereby realizing the electrical connection between the first wire 16 and the conductive sheet 11.

[0039] In this embodiment, preferably, an annular groove 2401 is provided on the first conductive tube 24, the second conductive tube 26 is inserted into the annular groove 2401, and the second conductive tube 26 contacts the inner wall of the annular groove 2401; a circular groove 2501 is provided on the first conductive column 25, the second conductive column 27 is inserted into the circular groove 2501, and the second conductive column 27 contacts the inner wall of the circular groove 2501, so that the connection between the first conductive tube 24 and the second conductive tube 26 and the first conductive column 25 and the second conductive column 27 is tighter, and the stability of the electrical connection is maintained.

[0040] The working principle of the present invention is: first, according to the size of the battery, the mounting plate 9 is slid so that the mounting plate 9 and the rubber pad 8 can clamp the power battery, and then the position of the conductive sheet 11 is adjusted by removing the bottom plate 10 and changing the mounting position, so that the two conductive sheets 11 are respectively arranged opposite to the positive and negative electrodes of the power battery, so that after the power battery is clamped, the positive and negative electrodes of the power battery are just in contact with the two conductive sheets 11 respectively, and then the power battery is placed on the test bench 2, and then the fixing cover 6 is covered, and the fixing cover 6 is fixedly connected to the vertical plate 5 by the buckle 7, and then the motor 42 is turned on, and the output end of the motor 42 drives the second gear 43 to rotate, thereby driving the rotating shaft 3 to rotate through the first gear 41, and the rotating shaft 3 drives the test bench 2 to rotate 180°, so that the power battery is flipped into the explosion-proof box 1, and then the electric push rod 17 drives the slide plate 18 to move toward the test bench 2, thereby driving the sealing plate 19 to move toward the test bench 2, so that the reinforcement plate 20 is inserted into the groove 201 Under the limiting and sealing effect of the reinforcement plate 20, even if an explosion occurs in the explosion-proof box 1, the impact force of the explosion is difficult to push the test bench 2 to rotate, thereby playing a reinforcement role. Then the power battery can be tested by the test mechanism. When one of the power batteries is tested, the other power battery can be placed on the fixing mechanism on the other side of the test bench 2 to improve the test efficiency; under the action of the connecting mechanism, the rotation of the rotating shaft 3 will not affect the electrical connection between the test mechanism and the conductive sheet 11. When the rotating shaft 3 rotates, it drives the second conductive cylinder 26 and the second conductive column 27 to rotate. Since the first conductive cylinder 24 is rotatably connected to the second conductive cylinder 26, the first conductive column 25 is rotatably connected to the second conductive column 27, and the first conductive cylinder 24 is electrically connected to the second conductive cylinder 26, and the first conductive column 25 is electrically connected to the second conductive column 27, even if the rotating shaft 3 rotates relative to the mounting shell 23, it will not affect the electrical connection between the test mechanism and the conductive sheet 11.

Claims

1. A retired power battery charge and discharge test device, comprising an explosion-proof box and a test mechanism for performing charge and discharge tests on the power battery, characterized in that: The top wall of the explosion-proof box is provided with an opening, a test bench is rotatably installed in the opening, the test bench is rotatably connected to the explosion-proof box via a rotating shaft, a fixing mechanism for clamping the power battery is provided at the top and bottom ends of the test bench, and a driving mechanism for driving the rotating shaft to rotate is provided on the explosion-proof box; Reinforcement mechanisms are provided on both opposite sides of the explosion-proof box, and the reinforcement mechanisms include an electric push rod, a slide plate and a sealing plate. The electric push rod is fixedly mounted on the side wall of the explosion-proof box, and the slide plate is slidably mounted at the opening of the explosion-proof box. The output end of the electric push rod is fixedly connected to the slide plate, and a sealing plate is fixedly mounted on one end of the slide plate away from the electric push rod, and a reinforcement plate is fixedly mounted on one side of the sealing plate away from the electric push rod. Grooves are provided on both opposite side walls of the test bench, and the reinforcement plates are adapted to the grooves. A mounting plate is slidably mounted on the top of the test bench, and two conductive mechanisms are detachably mounted on the mounting plate, and the two conductive mechanisms are electrically connected to the positive electrode and the negative electrode of the test mechanism respectively through the connecting mechanism; The conductive mechanism comprises a bottom plate, on which a conductive sheet is fixedly mounted; The connecting mechanism includes a mounting shell, and the driving mechanism includes a supporting frame. The mounting shell is fixedly connected to the supporting frame, one end of the rotating shaft extends into the mounting shell, and the rotating shaft is rotatably connected to the mounting shell. A first conductive cylinder and a first conductive column are fixedly installed on a side of the inner cavity of the mounting shell away from the rotating shaft. The first conductive column is located inside the first conductive cylinder, and the first conductive cylinder and the first conductive column are electrically connected to the positive and negative poles of the testing mechanism respectively through two second wires. A second conductive cylinder and a second conductive column are fixedly installed on one end of the rotating shaft extending into the mounting shell, and the second conductive column is located inside the first conductive cylinder. The first conductive cylinder is electrically connected to the second conductive cylinder, and the first conductive cylinder and the second conductive cylinder column are rotatably matched. The first conductive column and the second conductive column are electrically connected, and the first conductive column and the second conductive column are rotatably matched. The second conductive cylinder and the second conductive column are electrically connected, and the first conductive column and the second conductive column are electrically matched. The second conductive cylinder and the second conductive column are electrically connected to the two conductive sheets respectively through two first wires, and the first conductive cylinder, the first conductive column, the second conductive cylinder and the second conductive column are coaxially arranged.

2. A retired power battery charge and discharge test device according to claim 1, characterized in that: The support frame is fixedly mounted on the side wall of the explosion-proof box, the rotating shaft is rotatably connected to the support frame, a first gear is mounted on the rotating shaft, a motor is fixedly mounted on the top wall of the explosion-proof box, a second gear is fixedly mounted on the output end of the motor, and the first gear is meshed with the second gear.

3. A retired power battery charge and discharge test device according to claim 1, characterized in that: The fixing mechanism includes a vertical plate and a fixing cover. The vertical plate is fixedly installed on one side of the top of the test bench. The fixing cover is arranged in an L shape, and the side wall of the fixing cover is rotatably connected to the other side of the top of the test bench. The fixing cover is connected to the vertical plate by a snap-fit ​​engagement, and the mounting plate and the vertical plate are arranged parallel to each other.

4. A retired power battery charge and discharge test device according to claim 3, characterized in that: The mounting plate is provided with a plurality of mounting holes, the bottom plate is detachably connected to the mounting plate via fixing bolts, and the fixing bolts are threadedly connected to the mounting holes.

5. A retired power battery charge and discharge test device according to claim 3, characterized in that: A guide rail is fixedly mounted on the test bench, a slide seat is slidably mounted on the guide rail, the slide seat is fixedly connected to the mounting plate, and a locking bolt for locking the slide seat is arranged on the slide seat.

6. A retired power battery charge and discharge test device according to claim 4, characterized in that: A threading channel is provided inside the test bench, the rotating shaft is hollow, and the first wire passes through the inner cavity of the rotating shaft, the threading channel and the mounting hole in sequence, and is electrically connected to the conductive sheet.

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