Lithium battery repairing device based on current pulse

Abstract

The utility model provides a lithium battery repairing device based on current pulse, which comprises a frame body comprising a first bearing plate and a second bearing plate, and the second bearing plate is provided with a bearing seat; the battery repairing instrument is arranged on the first bearing plate; the protection unit comprises a thermal detection unit and a telescopic part, two conductive terminals are arranged at the lower end part of the telescopic part at intervals, the two conductive terminals are respectively connected with two binding posts of the battery repair instrument, and the thermal detection unit is used for detecting the surface temperature of a to-be-repaired battery; the telescopic piece is configured to contract when the temperature detected by the thermal detection unit exceeds a preset value, so that the conductive terminal moves in the direction far away from the second bearing plate; the surface temperature of the battery can be detected through the thermal detection unit, when the temperature of the battery exceeds a preset value, the telescopic piece is controlled to contract, connection between the battery repairing instrument and the battery can be disconnected in time, battery thermal runaway caused by continuous repairing is avoided, and therefore safety is improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of battery repair, and in particular to a lithium battery repair device based on current pulses. Background Art

[0002] When pulse repairing a lithium battery, an electric pulse is applied to the lithium battery. Pulses of a certain frequency, width, amplitude and time interval are applied to the lithium battery to improve the efficiency of the chemical reaction inside the battery, thereby increasing the battery's ability to store electrical energy again and achieving a repair effect. This method can be applied to lithium batteries that have lost their activity due to excessive discharge, charging, or long-term non-use. It is a commonly used battery repair method.

[0003] At present, when using this method to repair lithium batteries, two terminals are led out by a repair instrument, and then connected to the two electrodes of the lithium battery respectively, and then a pulse current is applied to the lithium battery. Since the battery will generate a lot of heat during the repair process, there is a risk of overheating during the repair process, which may cause combustion in severe cases. However, the current battery repair device lacks corresponding safety devices, which poses a great safety hazard. Utility Model Content

[0004] In view of the above problems, the present application provides a lithium battery repair device based on current pulses to solve the technical problems existing in the prior art.

[0005] The utility model provides a lithium battery repair device based on current pulse, comprising:

[0006] The frame includes a first supporting plate and a second supporting plate spaced apart from top to bottom in the vertical direction, wherein a supporting seat for placing the battery to be repaired is arranged on the second supporting plate;

[0007] A battery repair device, arranged on the first carrying plate;

[0008] The protection unit includes a thermal detection unit arranged on the second supporting plate and a telescopic member vertically arranged on the lower surface of the first supporting plate, two conductive terminals are arranged at intervals at the lower end of the telescopic member, and the two conductive terminals are respectively connected to two terminals of the battery repair instrument. The thermal detection unit is used to detect the surface temperature of the battery to be repaired, and the telescopic member is configured to contract when the temperature detected by the thermal detection unit exceeds a predetermined value, so that the conductive terminal moves in a direction away from the second supporting plate.

[0009] Specifically, through the above-mentioned setting method, when repairing the battery, the battery is placed on the supporting seat, the thermal detection unit contacts the battery, and the telescopic part is extended to drive the two conductive terminals to move downward so as to contact the two electrodes of the repaired battery respectively, thereby completing the connection between the conductive terminals and the battery, and then the battery repair instrument applies a pulse current to the battery to repair the battery. During the repair process, the surface temperature of the battery is detected by the thermal detection unit. When the battery temperature exceeds a predetermined value, the telescopic part is controlled to contract and move the conductive terminals upward to disconnect the battery, so that the connection can be disconnected in time to avoid thermal runaway of the battery caused by continued repair, thereby improving safety.

[0010] Furthermore, a rotating sleeve is rotatably provided at the lower end of the telescopic member, and the two conductive terminals are provided on the rotating sleeve.

[0011] Specifically, by providing a rotating sleeve, the position of the conductive terminal can be adjusted by rotating the rotating sleeve to correspond to the electrode of the battery to be repaired. The position of the conductive terminal can also be adjusted according to different models of batteries to improve adaptability.

[0012] Furthermore, along the radial direction of the rotating sleeve, two second telescopic members are provided on the outer circumferential surface of the rotating sleeve, and the two conductive terminals are respectively provided on the two second telescopic members.

[0013] Specifically, by setting up a second telescopic member, the distance and position of the two conductive terminals can be adjusted within a larger range through the extension and retraction of the second telescopic member in coordination with the rotation of the rotating sleeve, thereby being able to adapt to more types of batteries and further improving adaptability.

[0014] Further, the thermal detection unit includes at least one detection component, which includes a rigid rod arranged on one side of the bearing seat, a heat conductor arranged on the upper end of the rigid rod, a temperature sensor arranged on the heat conductor, and a driving rod drivenly connected to the lower end of the rigid rod, and the middle area of ​​the rigid rod is rotatably connected to the second bearing plate through a horizontally arranged first pin shaft, and the driving rod can drive the rigid rod to rotate around the first pin shaft.

[0015] Specifically, through the above-mentioned arrangement, when the battery to be repaired is placed on the supporting seat for repair, the driving rod can drive the rigid rod to swing, so that the upper end is deflected in the direction close to the supporting seat, so that the heat conductor contacts the battery to be repaired for detection. After the battery is repaired, the battery is removed, and the driving rod can drive the rigid rod to swing in the opposite direction, so that the heat conductor moves in the direction away from the supporting seat, which can prevent the heat conductor from blocking the supporting seat, thereby facilitating the placement of the battery on the supporting seat again.

[0016] Furthermore, the detection component comprises two detection components symmetrically arranged on both sides of the bearing seat, and the first pin axis is perpendicular to the symmetry axes of the two detection components.

[0017] Specifically, by symmetrically setting up two detection components, when repairing the battery, the battery can be clamped by swinging two rigid rods. On the one hand, it can provide a certain limiting effect on the battery and reduce the risk of the battery falling due to external force collision. In addition, by clamping the battery to be repaired by two heat conductive parts, the temperature of the battery can be better detected. When the temperature sensor on one heat conductive part fails, the battery temperature can still be detected, thereby improving reliability.

[0018] Furthermore, the heat conducting member is a columnar structure disposed at the end of the rigid rod, and the axis of the heat conducting member of the columnar structure is disposed parallel to the first pin shaft.

[0019] Specifically, by setting the heat conductor to be columnar, the contact area with the battery to be repaired can be increased, and when the swing amplitude of the rigid rod is inconsistent when dealing with batteries of different models, the heat conductor can contact the battery casing with a circular surface, which can ensure the consistency of detection and thus improve the detection accuracy.

[0020] Furthermore, a guide rod is provided on the second bearing plate for vertical guidance, the bearing seat is provided at the upper end of the guide rod, a limit plate is provided at the lower end of the guide rod, a support spring is provided between the bearing seat and the second bearing plate, one end of the driving rod is hingedly connected to the limit plate through a second pin shaft, and the other end is hingedly connected to the lower end of the rigid rod through a third pin shaft, and the second pin shaft and the third pin shaft are both provided parallel to the first pin shaft.

[0021] Specifically, by setting a guide rod and a support spring, the support spring can provide a supporting force to the bearing seat, so that the limit plate abuts against the lower surface of the second bearing plate, and drives the driving rod to drive the rigid rod to rotate, so that the upper end of the rigid rod is deflected in the direction away from the bearing seat. When the battery to be repaired is placed on the bearing seat, the support spring is squeezed downward under the action of the gravity of the battery, thereby pushing the limit plate downward and driving the rigid rod to swing, so that the heat conductor contacts the battery casing. Through this setting method, the battery's own gravity is cleverly used to drive the rigid rod to swing.

[0022] Furthermore, a T-shaped groove is provided on the lower surface of the limit plate, the guiding direction of the T-shaped groove is perpendicular to the first pin shaft, two sliding members are provided in the T-shaped groove for spaced-apart guiding, the sliding member is hingedly connected to the driving rod through a second pin shaft, and a second compression spring is provided between the two sliding members.

[0023] Specifically, by setting a T-shaped slide groove, setting a sliding part in the T-shaped slide groove, and setting a second compression spring between the two sliding parts, the elastic force of the second compression spring can provide supporting force to the two sliding parts, thereby driving the upper end of the rigid rod to deflect toward the direction close to the supporting seat. By setting the second compression spring, when repairing a battery with a larger size, the supporting plate continues to move downward when the heat conductive part contacts the battery to be repaired. At this time, the sliding part can be squeezed by the second compression spring to slide in the T-shaped slide groove to achieve the purpose of avoidance, thereby being able to cope with batteries of various sizes and improving adaptability.

[0024] Furthermore, both ends of the T-shaped slide groove can be detachably fixedly connected with limiting members.

[0025] Beneficial Effects

[0026] The utility model provides a lithium battery repair device based on current pulse, comprising: a frame, comprising a first carrier plate and a second carrier plate arranged at intervals from top to bottom in a vertical direction, wherein a carrier seat for placing a battery to be repaired is arranged on the second carrier plate; a battery repair instrument, arranged on the first carrier plate; a protection unit, comprising a heat detection unit arranged on the second carrier plate and a telescopic member arranged vertically on the lower surface of the first carrier plate, two conductive terminals are arranged at intervals on the lower end of the telescopic member, and the two conductive terminals are respectively connected to two terminals of the battery repair instrument, the heat detection unit is used to detect the surface temperature of the battery to be repaired, and the telescopic member is configured to contract when the temperature detected by the heat detection unit exceeds a predetermined value, so that the conductive terminal moves in a direction away from the second carrier plate; the heat detection unit contacts the battery, and the surface temperature of the battery is detected by the heat detection unit during the repair process. When the battery temperature exceeds the predetermined value, the telescopic member is controlled to contract, and the conductive terminal is moved upward to disconnect from the battery, so that the connection can be disconnected in time to avoid thermal runaway of the battery caused by continued repair, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0028] Figure 1 A side structural schematic diagram of a lithium battery repair device based on current pulse provided by the utility model.

[0029] Figure 2 for Figure 1 The schematic diagram of the cross-sectional structure of a lithium battery repair device based on current pulse provided by the utility model at AA is shown.

[0030] Figure 3The utility model is a schematic diagram of the cross-sectional structure of a limit plate in a lithium battery repair device based on current pulse.

[0031] Figure 4 This is a schematic diagram of the partially enlarged structure of a limit plate in a lithium battery repair device based on current pulse provided by the utility model.

[0032] Figure 5 The utility model provides a schematic diagram of the connection structure of the air storage chamber, the extrusion chamber and the telescopic member in a lithium battery repair device based on current pulse.

[0033] Figure 6 for Figure 5 The figure shows a schematic diagram of the local enlarged structure of point B in a lithium battery repair device based on current pulse provided by the utility model. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] Embodiment 1

[0037] The utility model provides a lithium battery repair device based on current pulse, as a specific implementation method, refer to Figure 1-Figure 4 , the device comprises:

[0038] The frame 1 includes a first carrier plate 10 and a second carrier plate 11 which are arranged in a vertical direction from top to bottom, and a carrier seat 12 for placing the battery to be repaired is arranged on the second carrier plate 11;

[0039] A battery repair device 2 is arranged on the first supporting plate 10;

[0040] The protection unit 3 includes a thermal detection unit 31 arranged on the second supporting plate 11 and a telescopic member 32 vertically arranged on the lower surface of the first supporting plate 10, two conductive terminals 33 are arranged at intervals at the lower end of the telescopic member, and the two conductive terminals 33 are respectively connected to the two terminals of the battery repair device 2. The thermal detection unit 31 is used to detect the surface temperature of the battery to be repaired, and the telescopic member 32 is configured to contract when the temperature detected by the thermal detection unit 31 exceeds a predetermined value, so that the conductive terminal 33 moves in a direction away from the second supporting plate.

[0041] Specifically, through the above-mentioned setting method, when repairing the battery, the battery is placed on the supporting seat 12, and the thermal detection unit 31 contacts the battery. The telescopic part 32 is extended to drive the two conductive terminals 33 to move downward so as to contact the two electrodes of the repaired battery respectively, thereby completing the connection between the conductive terminals 33 and the battery, and then the battery repair device 2 is used to apply a pulse current to the battery to repair the battery. During the repair process, the surface temperature of the battery is detected by the thermal detection unit 31. When the battery temperature exceeds a predetermined value, the telescopic part 32 is controlled to contract and move the conductive terminals upward to disconnect the battery, so that the connection can be disconnected in time to avoid continued repair and thermal runaway of the battery, thereby improving safety. It should be noted that the battery repair device 2 used in this application adopts any one of the existing technologies that can meet the requirements of pulse repair of lithium batteries.

[0042] Further, as a preferred embodiment, refer to Figure 1 , Figure 2 A rotating sleeve 320 is rotatably disposed at the lower end of the telescopic member 32 , and the two conductive terminals 33 are disposed on the rotating sleeve 320 .

[0043] Specifically, it can be understood that the setting positions of the positive and negative terminals of batteries of different types may be different. In order to be able to repair batteries of different types, the present application provides a rotating sleeve, which can adjust the position of the conductive terminal 33 by rotating the rotating sleeve so that it corresponds to the electrode of the battery to be repaired. It can also adjust the position of the conductive terminal according to different types of batteries to improve adaptability.

[0044] Furthermore, as a specific implementation, along the radial direction of the rotating sleeve 320 , two second telescopic members 321 are further provided on the outer circumferential surface of the rotating sleeve 320 , and the two conductive terminals 33 are respectively provided on the two second telescopic members 321 .

[0045] Specifically, by setting up a second telescopic member 321, the distance and position of the two conductive terminals can be adjusted within a larger range by extending and retracting the second telescopic member 321 in coordination with the rotation of the rotating sleeve 320, so that more types of batteries can be adapted, further improving adaptability. It should be noted that in the present application, the second telescopic member 321 adopts a telescopic rod that can be manually extended and retracted, and the length of the second telescopic member 321 can be adjusted according to the distance between the battery terminals when in use.

[0046] Furthermore, in some embodiments, two rotating sleeves 320 are axially rotatably provided at the end of the telescopic member 32, and the two rotating sleeves can rotate independently without affecting each other, and the two second telescopic members are respectively provided on the two rotating sleeves, so as to better adjust the positions of the two conductive terminals 33.

[0047] Further, as a specific implementation method, refer to Figure 1-Figure 4 The thermal detection unit 31 includes at least one detection component, which includes a rigid rod 310 arranged on one side of the bearing seat 12, a heat conductor 311 arranged on the upper end of the rigid rod 310, a temperature sensor 312 arranged on the heat conductor 311, and a driving rod 313 drivenly connected to the lower end of the rigid rod 310. The middle area of ​​the rigid rod 310 is rotatably connected to the second bearing plate 11 through a horizontally arranged first pin shaft 314, and the driving rod can drive the rigid rod to rotate around the first pin shaft.

[0048] Specifically, through the above-mentioned setting method, when the battery is repaired, the heat conductor 311 contacts the battery shell to conduct the heat of the battery shell. The temperature sensor is arranged on the heat conductor 311. The heat conductor 311 is made of a material with good thermal conductivity, such as copper. When the temperature detected by the temperature sensor exceeds the threshold, the telescopic member 32 contracts to disconnect. In some embodiments, the telescopic member 32 can use an electric telescopic rod. When the battery to be repaired is placed on the support seat 12 for repair, the rigid rod 311 can be driven to swing by the driving rod 313, so that the upper end is deflected in the direction close to the support seat 12, so that the heat conductor 311 contacts the battery to be repaired for detection. After the battery is repaired, the battery is removed, and the driving rod can drive the rigid rod to swing in the opposite direction, so that the heat conductor 311 moves away from the support seat 12, so as to avoid the heat conductor 311 blocking the support seat 12, thereby facilitating the placement of the battery on the support seat again.

[0049] Further, as a specific implementation, the detection component includes two detection components symmetrically arranged on both sides of the bearing seat 12, and the first pin axis is perpendicular to the symmetry axes of the two detection components.

[0050] Specifically, by symmetrically setting up two detection components, when repairing the battery, the battery can be clamped by swinging two rigid rods. On the one hand, it can provide a certain limiting effect on the battery and reduce the risk of the battery falling due to external force collision. In addition, by clamping the battery to be repaired by two heat conductive parts 311, the temperature of the battery can be better detected. When the temperature sensor on one heat conductive part 311 fails, the battery temperature can still be detected, thereby improving reliability.

[0051] Further, as a specific implementation, the heat conducting member 311 is a columnar structure disposed at the end of the rigid rod, and the axis of the heat conducting member 311 of the columnar structure is disposed parallel to the first pin shaft.

[0052] Specifically, by setting the heat conductor 311 to be columnar, the contact area with the battery to be repaired can be increased, and when the swing amplitude of the rigid rod is inconsistent when dealing with batteries of different models, the heat conductor 311 can contact the battery casing with a circular surface, thereby ensuring the consistency of detection and improving the detection accuracy.

[0053] Further, as a specific embodiment, a guide rod 120 is vertically guided on the second bearing plate 11, the bearing seat 12 is arranged at the upper end of the guide rod 120, and a limiting plate 121 is arranged at the lower end of the guide rod 120, and a support spring 123 is arranged between the bearing seat and the second bearing plate 11, one end of the driving rod 313 is hingedly connected to the limiting plate 121 through a second pin shaft, and the other end is hingedly connected to the lower end of the rigid rod through a third pin shaft, and the second pin shaft and the third pin shaft are both arranged parallel to the first pin shaft.

[0054] Specifically, by setting the guide rod 120 and the support spring 123, the support spring 123 can provide a supporting force to the bearing seat, so that the limit plate is against the lower surface of the second bearing plate, and the driving rod is driven to drive the rigid rod to rotate, so that the upper end of the rigid rod is deflected away from the bearing seat. When the battery to be repaired is placed on the bearing seat, the support spring is squeezed downward under the action of the gravity of the battery, thereby pushing the limit plate downward and driving the rigid rod to swing, so that the heat conductor 311 contacts the battery casing. Through this setting method, the battery's own gravity is cleverly used to drive the rigid rod to swing.

[0055] Further, as a specific implementation method, refer to Figure 3 , Figure 4 A T-shaped slide groove 1210 is provided on the lower surface of the limit plate 121, and the guiding direction of the T-shaped slide groove 1210 is perpendicular to the first pin shaft. Two sliding members 1211 are provided in the T-shaped slide groove 1210 for spaced-apart guiding. The sliding member is hingedly connected to the driving rod through a second pin shaft, and a second compression spring 1212 is provided between the two sliding members 1211.

[0056] Specifically, by setting a T-shaped slide groove 1210, setting a sliding member 1211 in the T-shaped slide groove 1210, and setting a second compression spring 1212 between the two sliding members, the elastic force of the second compression spring 1212 can provide support force to the two sliding members, thereby driving the upper end of the rigid rod to deflect toward the direction close to the supporting seat. By setting the second compression spring, when repairing a battery with a larger size, the supporting plate continues to move downward when the heat conductive member contacts the battery to be repaired. At this time, the sliding member can slide in the T-shaped slide groove 1210 by squeezing the second compression spring to achieve the purpose of avoidance, thereby being able to cope with batteries of various sizes and improving adaptability.

[0057] Further, as a specific implementation, both ends of the T-shaped slide groove 1210 can be detachably fixedly connected with a limiter 1213. Specifically, by setting the limiter 1213 to limit the two sliding members 1211, when the two sliding members are in contact with the two limiters respectively, the second compression spring can be in a compressed state, which is a thrust force for the two sliding members to push the driving rod to move.

[0058] Embodiment 2

[0059] The utility model provides a lithium battery repair device based on current pulse, as a specific implementation method, refer to Figure 5 , Figure 6 , which is different from the first embodiment in that the telescopic member 32 includes a first sleeve body 32a and a second sleeve body 32b connected by a sliding sleeve, a connecting flange is provided at the end of the first sleeve body, a tension spring 32c is provided between the connecting flange and the second sleeve body, and the tension spring 32c can provide the second sleeve body with a force to contract to the inside of the first sleeve body, a first communicating air port is provided on the side wall of the first sleeve body, and also includes an extrusion chamber and an energy storage chamber, the extrusion chamber includes a first cylinder body 113 provided on the second bearing plate 11, a second cylinder body 114 slidingly extending into the first cylinder body 113, the second cylinder body is connected to the lower surface of the bearing seat 12, a support spring 123 is provided inside the first cylinder body and the second cylinder body, and a second vent 115 and a third vent 116 are provided on the bottom side wall of the first cylinder body, The energy storage chamber 35 includes a first chamber 350 and a second chamber 351. A piston is arranged in the second chamber. A retaining compression spring 353 is arranged between the end of the second chamber away from the first chamber and the piston. A fourth air vent 354 and a fifth air vent 355 are arranged on the side wall of the first chamber. A discharge valve 37 is also arranged on the side wall of the first chamber. The fifth air vent 355 is connected to the first air vent, and an electromagnetic valve 36 is arranged between the fifth air vent 355 and the first air vent. The second air vent 115 is connected to the fourth air vent 354. A one-way valve 117 that allows airflow to flow into the first cylinder in one direction is arranged on the third air vent 116. With this arrangement, when no battery is placed on the bearing seat 12, the support spring 123 is in an extended state. At this time, the states of the piston 352 and the telescopic member 32 are as follows: Figure 5 As shown, when the battery is placed on the support seat 12, the support spring 123 is squeezed under the action of gravity to move the support seat 12 downward. At this time, the gas inside the first tube and the second tube can be squeezed to flow to the first cavity. At this time, the solenoid valve 36 is in a closed state, and the airflow accumulates in the first cavity, so that the air pressure in the first cavity increases to push the piston to move and compress the holding spring 353. After the lower surface of the support seat 12 contacts the second support plate, it no longer moves downward, and then the position of the conductive terminal 33 is adjusted to correspond to the battery terminal, and then the solenoid valve 36 is opened. Under the elastic force of the holding spring 353, the piston can be pushed to move, thereby squeezing the gas into the first cylinder 113, so that the second cylinder is extended, thereby pushing the conductive terminal 33 to connect with the battery. Through this setting, the thrust of the conductive terminal 33 driven by air pressure is small, and the battery will not be damaged.

[0060] During the battery repair process, if the temperature detected by the temperature sensor exceeds the threshold, the relief valve 37 is controlled to open to release the air pressure. After the air pressure is reduced, the telescopic part retracts under the elastic force of the tension spring 32c, and the connection with the battery is disconnected. After the relief valve is opened for a predetermined period of time, the solenoid valve 36 switches to a closed state. At this time, the operator removes the battery, and the support seat is pushed up under the elastic force of the support spring 123, so as to facilitate the next detection. At this time, the one-way valve 17 is opened, and the air flow can enter the first cylinder.

[0061] During the battery repair process, if the temperature is normal, the discharge valve remains closed. After the battery repair is completed, the battery is taken out, and the support seat is pushed upward under the elastic force of the support spring 123, and the telescopic part is retracted under the elastic force of the tension spring 32c, and then the solenoid valve is switched to the closed state, and then the next repair is carried out.

[0062] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A lithium battery repair device based on current pulse, characterized in that: include: A frame (1) comprises a first carrier plate (10) and a second carrier plate (11) which are arranged in a vertical direction from top to bottom with a spacing therebetween, wherein the second carrier plate (11) is provided with a carrier seat (12) for placing a battery to be repaired; A battery repair device (2) is arranged on the first supporting plate (10); The protection unit (3) comprises a heat detection unit (31) arranged on the second supporting plate (11) and a telescopic member (32) vertically arranged on the lower surface of the first supporting plate (10), two conductive terminals (33) are arranged at intervals at the lower end of the telescopic member, and the two conductive terminals (33) are respectively connected to two terminals of the battery repair device (2), the heat detection unit (31) is used to detect the surface temperature of the battery to be repaired, and the telescopic member (32) is configured to shrink when the temperature detected by the heat detection unit (31) exceeds a predetermined value, so that the conductive terminal (33) moves in a direction away from the second supporting plate.

2. A lithium battery repair device based on current pulse according to claim 1, characterized in that: A rotating sleeve (320) is rotatably disposed at the lower end of the telescopic member (32), and the two conductive terminals (33) are disposed on the rotating sleeve (320).

3. A lithium battery repair device based on current pulse according to claim 2, characterized in that: Two second telescopic members (321) are further provided on the outer peripheral surface of the rotating sleeve (320) along the radial direction of the rotating sleeve (320), and the two conductive terminals (33) are respectively provided on the two second telescopic members (321).

4. A lithium battery repair device based on current pulse according to claim 2, characterized in that: The thermal detection unit (31) includes at least one detection component, which includes a rigid rod (310) arranged on one side of the bearing seat (12), a heat conductive member (311) arranged on the upper end of the rigid rod (310), a temperature sensor (312) arranged on the heat conductive member (311), and a driving rod (313) drivingly connected to the lower end of the rigid rod (310), wherein the middle area of ​​the rigid rod (310) is rotatably connected to the second bearing plate (11) via a horizontally arranged first pin shaft (314), and the driving rod can drive the rigid rod to rotate around the first pin shaft.

5. A lithium battery repair device based on current pulse according to claim 4, characterized in that: The detection component comprises two detection components symmetrically arranged on both sides of the bearing seat (12), and the first pin axis is perpendicular to the symmetry axes of the two detection components.

6. A lithium battery repair device based on current pulse according to claim 5, characterized in that: The heat conducting member (311) is a columnar structure arranged at the end of the rigid rod, and the axis of the heat conducting member (311) of the columnar structure is arranged parallel to the first pin shaft.

7. A lithium battery repair device based on current pulse according to claim 6, characterized in that: A guide rod (120) is vertically guided on the second bearing plate (11), the bearing seat (12) is arranged at the upper end of the guide rod (120), and a limit plate (121) is arranged at the lower end of the guide rod (120), one end of the driving rod (313) is hingedly connected to the limit plate (121) through a second pin shaft, and the other end is hingedly connected to the lower end of the rigid rod through a third pin shaft, and the second pin shaft and the third pin shaft are both arranged parallel to the first pin shaft.

8. A lithium battery repair device based on current pulse according to claim 7, characterized in that: A T-shaped slide groove (1210) is arranged on the lower surface of the limiting plate (121), the guiding direction of the T-shaped slide groove (1210) is perpendicular to the first pin shaft, two sliding members (1211) are arranged in the T-shaped slide groove (1210) for guiding at intervals, the sliding members are hingedly connected to the driving rod via a second pin shaft, and a second compression spring (1212) is arranged between the two sliding members (1211).

9. A lithium battery repair device based on current pulse according to claim 8, characterized in that: Both ends of the T-shaped slide groove (1210) can be detachably connected to the limiting members (1213).

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