Waste lithium battery discharge temperature safety monitoring device

Abstract

The utility model discloses a waste lithium battery discharge temperature safety monitoring device, which belongs to the technical field of waste lithium battery discharge temperature monitoring equipment, and comprises a waste lithium battery pack placed on an insulating support platform, a plurality of battery monomers are arranged and fixed in the waste lithium battery pack, and the battery monomers are arranged on the insulating support platform. The plurality of battery monomers are connected in series to the end base through electric wires, the end base is externally connected with a temperature detection signal line to monitoring equipment, and the safety monitoring device comprises four telescopic supports which are distributed in a rectangular shape; the telescopic sections of the telescopic supports located on the same front side and the same rear side are connected together through transverse support plates. The discharge temperature safety monitoring device can monitor the temperature change of each battery monomer in the lithium battery pack and the ambient temperature change around the insulation support platform, provides reliable discharge temperature monitoring data, facilitates the analysis and comparison of experimenters, and obtains the real discharge performance data of the waste lithium battery pack.

Description

Technical Field

[0001] This utility model relates to the technical field of waste lithium battery discharge temperature monitoring equipment, and more specifically, to a waste lithium battery discharge temperature safety monitoring device. Background Technology

[0002] Currently, when recycling lithium battery packs from new energy vehicles, the first step is to weigh the used lithium battery packs. After weighing, the lithium battery packs are discharged on an insulated support platform to evaluate their performance. During this process, staff connect to the interface of the lithium battery pack and obtain the temperature of the used lithium battery pack in real time through the Temp signal line of the Battery Management System (BMS) to achieve the purpose of monitoring.

[0003] The existing discharge temperature safety monitoring methods described above have the following problems in actual discharge monitoring: First, the temperature detection signal line is generally set in a groove on the busbar of the lithium battery pack, and the temperature sensor is fixed in the groove to monitor the temperature of the busbar and reflect the overall temperature of the lithium battery pack during operation. However, the lithium battery pack is composed of multiple battery cells, and the quality of each battery cell is different, which often leads to uneven temperature distribution. In addition, due to the different heat dissipation conditions caused by the installation position between battery cells, monitoring the temperature of the busbar by only the temperature detection signal line cannot reflect the actual discharge temperature of the lithium battery pack well, which poses a safety hazard. Second, the temperature change of the surrounding environment of the lithium battery pack during discharge will also affect the temperature change of the lithium battery pack. It is necessary to obtain the ambient temperature change and the monitored temperature in real time for real-time correlation comparison in order to obtain reliable discharge performance data of the waste lithium battery pack. Utility Model Content

[0004] The purpose of this invention is to provide a safety monitoring device for the discharge temperature of waste lithium batteries. This device can monitor the temperature changes of each individual cell inside the lithium battery pack and the ambient temperature changes around the insulating support platform, providing relatively reliable discharge temperature monitoring data. This facilitates analysis and comparison by experimental personnel to obtain the true discharge performance data of the waste lithium battery pack.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A safety monitoring device for the discharge temperature of waste lithium batteries includes a waste lithium battery pack placed on an insulating support platform. Several individual battery cells are arranged and fixed inside the waste lithium battery pack. Each individual battery cell is connected in series to an end base via wires. A temperature detection signal line is connected externally to the end base to a monitoring device. The safety monitoring device includes four telescopic supports arranged in a rectangle. The telescopic sections of the supports located on the same front and rear sides are connected together by transverse support plates. Two parallel tracks are provided between the support plates, each track consisting of four rectangularly arranged guide rods. A control box is fixed to the outer side of the support plate located on the end base side. The control box is connected to the monitoring device via a detection signal line and to a power socket via a power cord.

[0007] As a further optimization of this solution, a damping bearing seat is provided on the surface of the support plate on one side of the control box. A support rod is fixedly connected to the outer side of the rotating part of the damping bearing seat. An ambient temperature sensor is fixed to the top of the support rod. The ambient temperature sensor is connected to the corresponding interface of the control box through a circuit.

[0008] As a further optimization of this solution, several cross-shaped slides are embedded in the cross-shaped area between the tracks. A toggle lever is connected to the top surface of each cross-shaped slide. A threaded rod is fixed to the outer side of each cross-shaped slide, and the upper limit of the track is achieved by a nut on the threaded rod. A terminal block is fixed to the inner side of each cross-shaped slide, and the terminal block is connected to the corresponding interface of the control box via a wire. A telescopic connecting rod is connected to the bottom surface of each cross-shaped slide, and an installation strip is connected to the lower telescopic section of the telescopic connecting rod. Several installation plates are evenly spaced on the lower side of the installation strip, and the installation plates are respectively attached to different positions on the upper side of the battery cell.

[0009] As a further optimization of this solution, the mounting strip has top plates on both sides of its upper surface. The outer side of the top plate is connected to the upper end of the inner side of the rotating plate via a reset spring. The front and rear sides of the middle position of the inner side of the rotating plate are connected to the rotating shafts on both sides of the mounting strip. The lower end of the inner side of the rotating plate is inserted into the grooves of the outer shells on both sides of the battery cell.

[0010] As a further optimization of this solution, the lower surface of the mounting plate is machined with several grooves, and a thermistor is embedded in each groove. The thermistor is connected to the terminal block through a wire.

[0011] As a further optimization of this solution, the height of the telescopic supports is limited by the locking bolts of the non-telescopic sections, and the waste lithium battery pack is equipped with lifting threaded cylinders around its perimeter.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows:

[0013] This invention utilizes multiple cross-shaped sliding structures designed on each track, each corresponding to a specific number of individual battery cells within the waste lithium battery pack. By covering different positions on the side of each battery cell with a thermistor and combining this with a control box, the temperature changes of each individual battery cell within the lithium battery pack are monitored, providing a better reflection of the actual discharge temperature of the lithium battery pack. Simultaneously, by designing a support rod to connect to an external ambient temperature sensor, the distance between the sensor and the waste lithium battery pack is extended, allowing for more accurate acquisition of ambient temperature change data around the insulating support platform. This provides more reliable discharge temperature monitoring data, facilitating analysis and comparison by researchers to obtain the true discharge performance data of the waste lithium battery pack. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the installation structure of the safety monitoring device of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure of the ambient temperature sensor of this utility model;

[0016] Figure 3 This is a schematic diagram of the cross-shaped slide connection structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the rotating plate connection structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure below the mounting plate of this utility model;

[0019] In the diagram: 1. Insulating support platform; 2. Waste lithium battery pack; 3. End base; 4. Temperature detection signal line; 5. Telescopic support; 6. Support plate; 7. Battery cell; 8. Control box; 9. Detection signal line; 10. Power line; 11. Wiring; 12. Damping bearing seat; 13. Support rod; 14. Ambient temperature sensor; 15. Guide rod; 16. Cross-shaped slide; 17. Actuating rod; 18. Nut; 19. Terminal block; 20. Telescopic connecting rod; 21. Mounting strip; 22. Mounting plate; 23. Top plate; 24. Return spring; 25. Rotating shaft; 26. Rotating clamp; 27. Threaded rod; 28. Thermistor. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0021] To address the issue that existing temperature detection signal lines 4 typically involve setting grooves on the busbar of a lithium battery pack and fixing temperature sensors within these grooves to monitor the busbar temperature and reflect the overall temperature of the lithium battery pack during operation, it's crucial to understand that lithium battery packs consist of multiple individual battery cells 7. The varying properties of each cell result in uneven temperature distribution. Furthermore, differences in heat dissipation due to the different installation positions of the individual cells mean that monitoring the busbar temperature solely through the temperature detection signal line 4 cannot accurately reflect the actual discharge temperature of the lithium battery pack, posing a safety hazard. Additionally, temperature changes in the surrounding environment during discharge can also affect the battery pack's temperature. Therefore, real-time comparison of ambient temperature changes with the monitored temperature is necessary to obtain reliable discharge performance data for used lithium battery packs.

[0022] like Figure 1 As shown, this application includes a waste lithium battery pack 2 placed on an insulating support platform 1. Several battery cells 7 are arranged and fixed inside the waste lithium battery pack 2. The several battery cells 7 are connected in series to the end base 3 through wires. The end base 3 is connected to a temperature detection signal line 4 to a monitoring device. The safety monitoring device includes four telescopic supports 5 arranged in a rectangular shape. The telescopic sections of the telescopic supports 5 located on the same front and rear sides are connected together by a horizontal support plate 6. Two parallel tracks are provided between the support plates 6. Each track consists of four guide rods 15 arranged in a rectangular shape. A control box 8 is fixed on the outer side of the support plate 6 located on the side of the end base 3. The control box 8 is connected to the monitoring device through a detection signal line 9 and is connected to a power socket through a power line 10.

[0023] like Figure 2 As shown, a damping bearing seat 12 is provided on the surface of the bracket plate 6 on one side of the control box 8. A bracket rod 13 is fixedly connected to the outer side of the rotating part of the damping bearing seat 12. An ambient temperature sensor 14 is fixed to the top of the bracket rod 13. The ambient temperature sensor 14 is connected to the corresponding interface of the control box 8 through the line 11.

[0024] like Figure 3 As shown, several cross-shaped slides 16 are embedded in the cross-shaped area between the tracks. A lever 17 is connected to the top surface of the cross-shaped slide 16. A threaded rod 27 is fixed to the outer side of the cross-shaped slide 16 and is positioned on the track by a nut 18 on the threaded rod 27. A terminal 19 is fixed to the inner side of the cross-shaped slide 16. The terminal 19 is connected to the corresponding interface of the control box 8 through a line 11. A telescopic connecting rod 20 is connected to the bottom surface of the cross-shaped slide 16. An installation strip 21 is connected to the lower telescopic section of the telescopic connecting rod 20. Several installation plates 22 are provided at equal intervals on the lower side of the installation strip 21 and are respectively attached to different positions on the upper side of the battery cell 7.

[0025] like Figure 4 As shown, the mounting strip 21 has a top plate 23 on both sides of its upper surface. The outer side of the top plate 23 is connected to the upper end of the inner side of the rotating plate 26 through a return spring 24. The front and rear sides of the middle position of the inner side of the rotating plate 26 are connected to the rotating shafts 25 on both sides of the mounting strip 21. The lower end of the inner side of the rotating plate 26 is inserted into the grooves of the outer shell on both sides of the battery cell 7.

[0026] like Figure 5 As shown, the lower surface of the mounting plate 22 is machined with several grooves, and a thermistor 28 is embedded in each groove. The thermistor 28 is connected to the terminal block 19 through wires.

[0027] Specifically, the safety monitoring device of this application is deployed around the existing insulating support platform 1 and connected to the detection signal line 9, power line 10 and related lines 11 of the control box 8. Multiple cross-shaped slides 16 are designed on each track, corresponding one-to-one with several battery cells 7 inside the waste lithium battery pack 2. Several mounting plates 22 are installed and fixed on the upper side of each battery cell 7 by the rotating plates 26 on both sides of the mounting strip 21, so that the thermistor 28 is in direct contact with each battery cell 7. When the waste lithium battery pack 2 is discharging, the temperature changes of different battery cells 7 are reflected in real time by the multiple thermistors 28 at different positions on the upper side of several battery cells 7 and the data is transmitted to the control box 8. At the same time, the control box 8 continuously obtains the external temperature data monitored by the ambient temperature sensor 14, which is convenient for monitoring personnel to make real-time comparisons.

[0028] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0029] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A safety monitoring device for the discharge temperature of waste lithium batteries, comprising a waste lithium battery pack placed on an insulating support platform, wherein a plurality of individual battery cells are arranged and fixed inside the waste lithium battery pack, and the plurality of individual battery cells are connected in series to an end base via wires, and a temperature detection signal line is connected externally to the end base to the monitoring device, characterized in that: The safety monitoring device includes four telescopic supports arranged in a rectangle. The telescopic sections of the supports located on the same front and rear sides are connected together by transverse support plates. Two parallel tracks are provided between the support plates, and each track consists of four guide rods arranged in a rectangle. A control box is fixed to the outer side of the support plate located on the end base side. The control box is connected to the monitoring equipment through a detection signal line and to a power socket through a power cord.

2. The waste lithium battery discharge temperature safety monitoring device according to claim 1, characterized in that: A damping bearing seat is provided on the surface of the support plate on one side of the control box. A support rod is fixedly connected to the outer side of the rotating part of the damping bearing seat. An ambient temperature sensor is fixed to the top of the support rod. The ambient temperature sensor is connected to the corresponding interface of the control box through a wire.

3. The waste lithium battery discharge temperature safety monitoring device according to claim 2, characterized in that: Several cross-shaped slides are embedded in the cross-shaped area between the tracks. A toggle lever is connected to the top surface of each cross-shaped slide. A threaded rod is fixed to the outer side of each cross-shaped slide and is positioned on the track by a nut on the threaded rod. A terminal block is fixed to the inner side of each cross-shaped slide. The terminal block is connected to the corresponding interface of the control box via a wire. A telescopic connecting rod is connected to the bottom surface of each cross-shaped slide. An installation strip is connected to the lower telescopic section of the telescopic connecting rod. Several installation plates are evenly spaced on the lower side of the installation strip, and the installation plates are respectively attached to different positions on the upper side of the battery cell.

4. The waste lithium battery discharge temperature safety monitoring device according to claim 3, characterized in that: The mounting strip has top plates on both sides of its upper surface. The outer side of the top plate is connected to the upper end of the inner side of the rotating plate via a return spring. The front and rear sides of the inner side of the rotating plate are connected to the rotating shafts on both sides of the mounting strip at the middle position. The lower end of the inner side of the rotating plate is inserted into the grooves on both sides of the outer shell of the battery cell.

5. The waste lithium battery discharge temperature safety monitoring device according to claim 4, characterized in that: The mounting plate has several grooves on its lower surface, and a thermistor is embedded in each groove. The thermistor is connected to the terminal block via a wire.

6. The waste lithium battery discharge temperature safety monitoring device according to claim 5, characterized in that: The telescopic supports are all limited in height by locking bolts on the non-telescopic sections, and the waste lithium battery packs are equipped with lifting threaded cylinders around their perimeter.

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