Lithium battery protection device integrating heat dissipation and fire extinguishing functions

Abstract

The utility model relates to lithium battery protection device technical field, concretely is a kind of lithium battery protection device of integrated heat dissipation and fire extinguishing function, including device shell, side plate body and top plate body, the top plate body detachably setting in the top of device shell, the inside of device shell is provided with heat conducting plate and radiating fin, the inner wall of device shell both sides is all provided with the radiating fan group for radiating, the surface of side plate body and the inner wall of device shell are provided with convenient overhaul mechanism, the inside of device shell is provided with high security mechanism, the surface of device shell of radiating fan group side is provided with dustproof dust-retaining mechanism. The utility model not only can reduce the risk that dust enters the inside of device shell through radiating hole, can integrate heat dissipation and fire extinguishing function, so that lithium battery protection device is more safe and reliable, and more convenient user operation when lithium battery protection device is used, and practicality is stronger.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery protection devices, specifically a lithium battery protection device that integrates heat dissipation and fire extinguishing functions. Background Technology

[0002] Lithium-ion batteries are widely used in electric vehicles, energy storage power stations and other fields due to their advantages such as high energy density and long cycle life. However, batteries are prone to thermal runaway when overcharged, short-circuited or poorly cooled, which can lead to fires or even explosions, making safety protection issues increasingly prominent.

[0003] Currently, existing lithium battery protection devices have the following shortcomings: First, the heat dissipation and fire extinguishing functions are set up separately. The cooling fan and heat dissipation holes cannot be closed in time during a fire, and the continuous entry of external oxygen will intensify the fire. At the same time, the fire extinguishing agent is easy to leak from the heat dissipation holes, resulting in reduced fire extinguishing efficiency and a lack of effective linkage control. Second, the fire extinguishing response method is singular, relying mainly on temperature sensors for fire detection. Once the sensor or control circuit is damaged in a fire, the fire extinguishing function will not be able to start, resulting in insufficient reliability. Third, although dustproof mesh plates are installed at the heat dissipation holes to ensure heat dissipation effect, the mesh plates are easy to clog after long-term use, and are inconvenient to disassemble and clean, affecting heat dissipation and maintenance efficiency. Fourth, the side plates and top plates of the device are mostly fixed with bolts. When repairing the internal lithium battery pack, a large number of bolts need to be disassembled and installed one by one, which is cumbersome. There is a lack of sliding guides and positioning structures, and disassembly and assembly are prone to misalignment and jamming.

[0004] To address the aforementioned issues, there is an urgent need for a lithium battery protection device that integrates heat dissipation and fire extinguishing functions. Utility Model Content

[0005] The purpose of this utility model is to provide a lithium battery protection device that integrates heat dissipation and fire extinguishing functions, so as to solve the problems in the above-mentioned background technology that dust can easily enter through the heat dissipation holes during use, affecting heat dissipation efficiency and equipment life, insufficient safety and reliability, as well as the cumbersome and time-consuming maintenance and disassembly of the side plate and top plate, and the lack of sliding guide structure, which can easily cause misalignment and jamming.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery protection device integrating heat dissipation and fire extinguishing functions, comprising a device shell, a side plate body, and a top plate body. The top plate body is detachably mounted on the top of the device shell. The interior of the device shell is provided with a heat-conducting plate and heat dissipation fins. The heat-conducting plate is attached to the outer wall of the lithium battery pack. Heat dissipation fan groups are provided on the inner walls of both sides of the device shell. A controller is mounted on the surface of the device shell. The surface of the side plate body and the inner wall of the device shell are provided with a maintenance-friendly mechanism. A high-safety mechanism is provided inside the device shell. A dustproof and ash-blocking mechanism is provided on the surface of the device shell on one side of the heat dissipation fan group.

[0007] Preferably, a top plate handle is installed at the center of the top of the top plate body, the side plate body is detachably connected to the front of the device housing, a side door handle is installed at the center of the surface of the side plate body, and the device housing is provided with a accommodating cavity for accommodating the lithium battery pack.

[0008] Preferably, the heat-conducting plate is connected to the heat dissipation fins via a heat-conducting connector. The heat-conducting plate is a heat-spreading plate, and the heat-conducting plate is filled with a phase change heat-conducting medium. The heat-conducting connector is a heat-conducting copper pipe. A temperature sensor is installed inside the housing of the device, and the temperature sensor is electrically connected to the controller.

[0009] Preferably, the cooling fan assembly is connected to the interior of the device housing through heat dissipation holes. A shock-absorbing pad is installed at the bottom of the device housing. The shock-absorbing pad is a silicone pad. Four sets of connecting blocks are symmetrically installed on the two sides of the top plate body. Four sets of fastening screw holes are symmetrically opened on the two sides of the device housing. The surface of the connecting block is provided with a mounting stud. One end of the mounting stud passes through the connecting block and is threadedly fastened to the fastening screw hole.

[0010] Preferably, the dustproof and ash-blocking mechanism includes four protective frames disposed on the surface of the device housing on one side of the cooling fan assembly, four mounting blocks symmetrically mounted on the two sides of the protective frames, and mounting screws disposed on the surface of the mounting blocks for connecting the protective frames and the device housing.

[0011] Preferably, the dustproof and dust-blocking mechanism further includes a detachable dustproof mesh plate disposed on the surface of the protective frame, L-shaped blocks symmetrically installed on both sides of the protective frame, screw hole bodies symmetrically opened on both sides of the protective frame, and fastening studs disposed on the surface of the L-shaped blocks for connecting the L-shaped blocks and the protective frame, one end of the fastening studs penetrating the L-shaped blocks and being threadedly fastened to the screw hole bodies.

[0012] Preferably, the high-safety mechanism includes an extinguishing agent storage tank disposed outside the device housing, a spray pipe disposed inside the device housing, adjacent spray pipes being connected by flanges, bolts and connecting pipes, a plurality of spray heads uniformly installed along the length of the spray pipe, the spray heads being connected to the interior of the spray pipe, and a delivery pipeline disposed on the surface of the extinguishing agent storage tank, one end of the delivery pipeline being connected to the extinguishing agent storage tank, and the other end extending into the device housing and communicating with the spray pipe.

[0013] Preferably, the high-safety mechanism further includes mounting sleeves installed at both ends of the spray pipe, the mounting sleeves being connected to the inner wall of the device housing by bolts, and control valves and pressure sensors installed on the delivery pipeline.

[0014] Preferably, the convenient maintenance mechanism includes guide sliders symmetrically installed on both sides of the side plate body, guide grooves symmetrically formed on the inner walls of both sides of the device housing for sliding cooperation with the guide sliders, positioning blocks installed on the surface of the guide sliders, and positioning slots formed on the inner walls of the guide grooves for engaging with the positioning blocks.

[0015] Preferably, the convenient maintenance mechanism further includes four fixing blocks symmetrically installed on the outer surfaces of both sides of the side plate body, and nails disposed on the surface of the fixing blocks for connecting the fixing blocks and the device housing, one end of the nails penetrating the fixing blocks and being threadedly fastened to the screw holes on the surface of the device housing.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the lithium battery protection device that integrates heat dissipation and fire extinguishing functions can not only reduce the risk of dust entering the device shell through heat dissipation holes, but also integrate heat dissipation and fire extinguishing functions, making the lithium battery protection device safer and more reliable, and making the lithium battery protection device more convenient for users to operate and more practical. 1. By setting up a dustproof and dust-proof mechanism, the lithium battery protection device achieves the function of preventing dust and dust, which reduces the risk of dust entering the device casing through the heat dissipation holes when using the lithium battery protection device. 2. By incorporating a highly secure mechanism, the lithium battery protection device achieves a high level of safety. This allows the device to integrate heat dissipation and fire extinguishing functions, making it safer and more reliable. 3. By incorporating a convenient maintenance mechanism, the lithium battery protection device is made easy to maintain, making it more user-friendly and practical. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the dustproof and ash-blocking mechanism of this utility model; Figure 3 This is a three-dimensional structural diagram of the high-safety mechanism of this utility model; Figure 4 This is a three-dimensional enlarged structural diagram of the device housing, side plate body, and shock-absorbing pad of this utility model; Figure 5 For the present utility model Figure 1 Enlarged structural diagram at point A; Figure 6 For the present utility model Figure 4 Enlarged structural diagram at point B; Figure 7 For the present utility model Figure 4 A magnified structural diagram at point C.

[0018] In the diagram: 1. Device housing; 01. Controller; 101. Lithium battery pack; 10. Receptacle; 11. Side panel body; 12. Side door handle; 13. Cooling fan assembly; 14. Top panel body; 15. Top panel handle; 16. Fastening screw holes; 17. Heat-conducting plate; 18. Heat dissipation fins; 19. Temperature sensor; 110. Shock-absorbing pad; 111. Connecting block; 112. Mounting studs; 2. Dustproof and dust-blocking mechanism; 21. Protective frame; 22. Dustproof mesh plate; 23. L 24. Molding block; 25. Fastening stud; 26. Mounting block; 27. Mounting screw; 3. Screw hole body; 3. High safety mechanism; 31. Extinguishing agent storage tank; 32. Delivery pipeline; 33. Control valve; 34. Pressure sensor; 35. Sprinkler pipe; 36. Sprinkler head; 37. Mounting sleeve; 38. Connecting pipe; 4. Convenient maintenance mechanism; 41. Fixing block; 42. Nail body; 43. Guide slider; 44. Positioning block; 45. Guide groove; 46. Positioning groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0020] The structure of the lithium battery protection device integrating heat dissipation and fire extinguishing functions provided by this utility model is as follows: Figure 1 and Figure 5 As shown, the device includes a housing 1, a side panel body 11, and a top panel body 14. The top panel body 14 is detachably mounted on the top of the housing 1. A top panel handle 15 is installed at the center of the top of the top of the top panel body 14. The side panel body 11 is detachably connected to the front of the housing 1. A side door handle 12 is installed at the center of the surface of the side panel body 11. A controller 01 is installed on the surface of the housing 1. The controller 01 can be of the LA series. The housing 1 has a cavity 10 for accommodating a lithium battery pack 101.

[0021] The device housing 1 is equipped with a heat-conducting plate 17 and heat dissipation fins 18 inside. The heat-conducting plate 17 is attached to the outer wall of the lithium battery pack 101. The heat-conducting plate 17 is connected to the heat dissipation fins 18 through a heat-conducting connector. The heat-conducting plate 17 is a heat-spreading plate. The heat-conducting plate 17 is filled with a phase change heat-conducting medium. The heat-conducting connector is a heat-conducting copper pipe. The heat-conducting copper pipe penetrates the side wall of the device housing 1. A sealing element is provided between the heat-conducting copper pipe and the side wall of the device housing 1 to avoid a decrease in sealing performance or heat leakage due to wall penetration. A heat-conducting silicone pad is attached to the side of the heat-conducting plate 17 near the lithium battery pack 101. The heat-conducting silicone pad is tightly attached to the outer wall of the lithium battery pack 101. A temperature sensor 19 is installed inside the device housing 1. The temperature sensor 19 is electrically connected to the controller 01.

[0022] Cooling fan assemblies 13 for heat dissipation are provided on the inner walls of both sides of the device housing 1. The cooling fan assemblies 13 are positioned directly opposite the heat dissipation holes on the surface of the device housing 1, and the air outlet direction of the cooling fan assemblies 13 is towards the heat dissipation holes. The input terminal of the cooling fan assemblies 13 is electrically connected to the output terminal of the controller 01. The cooling fan assemblies 13 are connected to the interior of the device housing 1 through the heat dissipation holes. A shock-absorbing pad 110 is installed at the bottom of the device housing 1. The shock-absorbing pad 110 is a silicone pad. Four sets of connecting blocks 111 are symmetrically installed on the surfaces of both sides of the top plate body 14. Four sets of fastening screw holes 16 are symmetrically opened on the surfaces of both sides of the device housing 1. A mounting stud 112 is provided on the surface of the connecting block 111. One end of the mounting stud 112 passes through the connecting block 111 and is threaded into the fastening screw hole 16.

[0023] Furthermore, such as Figure 6 and Figure 7 As shown, the surface of the side plate body 11 and the inner wall of the device housing 1 are provided with a convenient maintenance mechanism 4. The convenient maintenance mechanism 4 includes guide sliders 43 symmetrically installed on both sides of the side plate body 11, guide grooves 45 symmetrically opened on both sides of the inner wall of the device housing 1 for sliding cooperation with the guide sliders 43, positioning blocks 44 installed on the surface of the guide sliders 43, and positioning grooves 46 opened on the inner wall of the guide grooves 45 for engaging with the positioning blocks 44. The maintenance-friendly mechanism 4 also includes four fixing blocks 41 symmetrically installed on the outer surfaces of both sides of the side plate body 11, and nail bodies 42 provided on the surface of the fixing blocks 41 for connecting the fixing blocks 41 and the device housing 1. One end of the nail body 42 passes through the fixing block 41 and is threadedly fastened to the screw hole on the surface of the device housing 1.

[0024] During implementation, by setting up convenient maintenance mechanisms, the lithium battery protection device is more convenient for users to operate and is more practical.

[0025] Furthermore, such as Figure 3As shown, a high-safety mechanism 3 is provided inside the outer casing 1 of the device. The high-safety mechanism 3 includes an extinguishing agent storage tank 31 located outside the outer casing 1 and fixedly installed on the outer wall of the outer casing 1 by a clamp; a spray pipe 35 located inside the outer casing 1 and fixedly installed on the inner top wall of the outer casing 1; adjacent spray pipes 35 are connected by flanges, bolts and connecting pipes 38; multiple spray heads 36 are evenly installed along the length of the spray pipe 35 and are connected to the inside of the spray pipe 35; and a delivery pipeline 32 located on the surface of the extinguishing agent storage tank 31. One end of the delivery pipeline 32 is connected to the extinguishing agent storage tank 31 and the other end extends into the outer casing 1 and is connected to the spray pipe 35. The high-safety mechanism 3 also includes mounting sleeves 37 installed at both ends of the spray pipe 35. The mounting sleeves 37 are connected to the inner wall of the device housing 1 by bolts. A control valve 33 and a pressure sensor 34 are installed on the delivery pipeline 32. The output ends of the control valve 33 and the pressure sensor 34 are electrically connected to the input end of the controller 01. The flange and bolts are existing technology and will not be described in detail here.

[0026] During implementation, by setting up a high-safety mechanism, heat dissipation and fire extinguishing functions can be integrated, making the lithium battery protection device safer and more reliable.

[0027] Furthermore, such as Figure 2 As shown, a dustproof and dust-blocking mechanism 2 is provided on the surface of the device housing 1 on one side of the cooling fan assembly 13. The dustproof and dust-blocking mechanism 2 includes four protective frames 21 provided on the surface of the device housing 1 on one side of the cooling fan assembly 13, four mounting blocks 25 symmetrically installed on the two sides of the protective frames 21, and mounting screws 26 provided on the surface of the mounting blocks 25 for connecting the protective frames 21 and the device housing 1. The dustproof and dust-blocking mechanism 2 also includes a detachable dustproof mesh plate 22 disposed on the surface of the protective frame 21, L-shaped blocks 23 symmetrically installed on both sides of the protective frame 21, screw hole bodies 27 symmetrically opened on both sides of the protective frame 21, and fastening studs 24 disposed on the surface of the L-shaped blocks 23 for connecting the L-shaped blocks 23 and the protective frame 21. One end of the fastening stud 24 passes through the L-shaped blocks 23 and is threadedly fastened to the screw hole body 27.

[0028] During implementation, by setting up a dustproof and dust-blocking mechanism, the risk of dust entering the device housing 1 through the heat dissipation holes can be reduced.

[0029] In this embodiment, the input terminal of the controller 01 is electrically connected to the temperature sensor 19 and the pressure sensor 34, and the output terminal of the controller 01 is electrically connected to the cooling fan assembly 13 and the control valve 33.

[0030] Working principle: During use, the outer casing 1 of the device is installed in the designated position with bolts. During the normal charging and discharging process of the lithium battery pack 101, the lithium battery pack 101 itself generates Joule heat and reaction heat. The heat is first transferred to the heat-conducting plate 17 that is in close contact with it through heat conduction. The heat-conducting plate 17 is a heat-spreading plate structure. The phase change heat-conducting medium inside it quickly and evenly distributes the heat through gas-liquid phase change, eliminating local hot spots. Then, the heat is quickly conducted to the heat dissipation fins 18 on the outside of the outer casing 1 through the heat-conducting connector. The temperature inside the outer casing 1 is monitored in real time under the action of the temperature sensor 19. If the surface temperature of the lithium battery pack 101 is too high, the controller 01 controls the cooling fan group 13 to turn on. The cooling fan group 13 dissipates the heat inside the outer casing 1 to the external environment through the heat dissipation holes.

[0031] It should be noted that when the temperature sensor 19 detects a fire risk, the controller 01 first shuts down the cooling fan group 13, and then opens the control valve 33 to release the fire extinguishing agent.

[0032] When air enters the device housing 1 through the cooling fan assembly 13 and the heat dissipation holes, the air first passes through the dust baffle 22. Under the action of the dust baffle 22 on the surface of the protective frame 21, dust and impurities in the air can be blocked, so that the dust content in the air entering the device housing 1 through the heat dissipation holes is lower. When cleaning the dust filter 22, the user loosens the fastening studs 24 on the surface of the L-shaped block 23, disengaging the fastening studs 24 from the screw hole body 27. Then, the user pulls the dust filter 22 away from the protective frame 21 to remove it from the surface of the protective frame 21. The dust filter 22 can then be disassembled and cleaned to achieve the dustproof and dustproof function of the lithium battery protection device, thereby reducing the risk of dust entering the device housing 1 through the heat dissipation holes during the use of the lithium battery protection device.

[0033] When the lithium battery pack 101 experiences an abnormal temperature rise inside the device casing 1 due to an internal short circuit or thermal runaway, the temperature sensor 19 collects the temperature signal in real time. When the detected value exceeds the preset safety threshold of the controller 01, the controller 01 immediately determines that there is a fire risk and opens the control valve 33 on the delivery pipeline 32. At this time, the fire extinguishing agent storage tank 31 contains perfluorohexanone fire extinguishing agent, and the tank is pre-filled with nitrogen as the driving gas. The perfluorohexanone fire extinguishing agent is rapidly released through the delivery pipeline 32 and enters the spray pipes 3, which are arrayed on the top wall of the device casing 1. In step 5, the spray is then directed downwards through the spray nozzle 36 to completely flood the surfaces and tabs of the lithium battery pack 101. The perfluorohexanone extinguishing agent absorbs a large amount of heat and interrupts the combustion chain reaction, quickly extinguishing the open flame and inhibiting the violent chemical reaction inside the battery, thereby achieving efficient fire extinguishing and rapid cooling. The pressure is monitored in real time by the pressure sensor 34 to achieve the high safety function of the lithium battery protection device. This allows the lithium battery protection device to integrate heat dissipation and fire extinguishing functions during use, making the lithium battery protection device safer and more reliable.

[0034] If the user needs to disassemble and maintain the lithium battery pack 101 inside the device housing 1, the user loosens the nail 42 on the surface of the fixing block 41, then holds the side door handle 12 and pulls the side plate body 11 away from the device housing 1. The side plate body 11 drives the guide slider 43 to slide in the guide groove 45. The positioning block 44 on the surface of the guide slider 43 moves away from the inside of the positioning groove 46. At this time, the side plate body 11 drives the fixing block 41 away from the surface of the device housing 1, and the side plate body 11 can be removed from the surface of the device housing 1. After disassembling and maintaining the lithium battery pack 101 in the accommodating cavity 10, the side plate body 11 can be reinstalled and reset. This realizes the function of convenient maintenance of the lithium battery protection device, making the lithium battery protection device more convenient for users to operate and more practical.

[0035] Meanwhile, the user can choose to loosen the mounting studs 112 on the surface of the connecting block 111, and hold the top plate handle 15 on the surface of the top plate body 14 to pull the top plate body 14 upwards to remove it, and then inspect and maintain the various components inside the device housing 1, and finally complete the use of the lithium battery protection device.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lithium battery protection device integrating heat dissipation and fire extinguishing functions, comprising a device housing (1), a side plate body (11), and a top plate body (14), characterized in that: The top plate body (14) is detachably mounted on the top of the device housing (1). The device housing (1) is provided with a heat-conducting plate (17) and heat dissipation fins (18). The heat-conducting plate (17) is attached to the outer wall of the lithium battery pack (101). The inner walls on both sides of the device housing (1) are provided with heat dissipation fan groups (13). The surface of the device housing (1) is equipped with a controller (01). The surface of the side plate body (11) and the inner wall of the device housing (1) are provided with a convenient maintenance mechanism (4). The inside of the device housing (1) is provided with a high safety mechanism (3). The surface of the device housing (1) on one side of the heat dissipation fan group (13) is provided with a dustproof and dust-proof mechanism (2).

2. The lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 1, characterized in that: A top plate handle (15) is installed at the center of the top of the top plate body (14). The side plate body (11) is detachably connected to the front side of the device housing (1). A side door handle (12) is installed at the center of the surface of the side plate body (11). A accommodating cavity (10) for accommodating the lithium battery pack (101) is provided inside the device housing (1).

3. A lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 2, characterized in that: The heat-conducting plate (17) is connected to the heat dissipation fins (18) through a heat-conducting connector. The heat-conducting plate (17) is a heat-spreading plate. The heat-conducting plate (17) is filled with a phase change heat-conducting medium. The heat-conducting connector is a heat-conducting copper pipe. A temperature sensor (19) is installed inside the outer shell (1) of the device. The temperature sensor (19) is electrically connected to the controller (01).

4. A lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 1, characterized in that: The cooling fan assembly (13) is connected to the interior of the device housing (1) through the heat dissipation holes. The bottom of the device housing (1) is equipped with a shock-absorbing pad (110), which is a silicone pad. Four sets of connecting blocks (111) are symmetrically installed on the two sides of the top plate body (14). Four sets of fastening screw holes (16) are symmetrically opened on the two sides of the device housing (1). The surface of the connecting block (111) is provided with a mounting stud (112). One end of the mounting stud (112) passes through the connecting block (111) and is threaded to the fastening screw hole (16).

5. A lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 1, characterized in that: The dustproof and dust-blocking mechanism (2) includes four protective frames (21) on the surface of the device housing (1) on one side of the cooling fan group (13), four mounting blocks (25) symmetrically mounted on the two sides of the protective frames (21), and mounting screws (26) on the surface of the mounting blocks (25) for connecting the protective frames (21) and the device housing (1).

6. A lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 5, characterized in that: The dustproof and dust-blocking mechanism (2) also includes a detachable dustproof mesh plate (22) set on the surface of the protective frame (21), L-shaped blocks (23) symmetrically installed on both sides of the protective frame (21), screw hole bodies (27) symmetrically opened on both sides of the protective frame (21), and fastening studs (24) set on the surface of the L-shaped blocks (23) for connecting the L-shaped blocks (23) and the protective frame (21). One end of the fastening studs (24) passes through the L-shaped blocks (23) and is threadedly fastened to the screw hole bodies (27).

7. A lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 1, characterized in that: The high-safety mechanism (3) includes an extinguishing agent storage tank (31) located outside the device housing (1), a spray pipe (35) located inside the device housing (1), adjacent spray pipes (35) being connected by flanges, bolts and connecting pipes (38), a plurality of spray heads (36) evenly installed along the length of the spray pipe (35), the spray heads (36) being connected to the interior of the spray pipe (35), and a delivery pipeline (32) located on the surface of the extinguishing agent storage tank (31), one end of the delivery pipeline (32) being connected to the extinguishing agent storage tank (31), and the other end extending into the device housing (1) and communicating with the spray pipe (35).

8. A lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 7, characterized in that: The high-safety mechanism (3) also includes mounting sleeves (37) installed at both ends of the spray pipe (35), the mounting sleeves (37) being connected to the inner wall of the device housing (1) by bolts, and control valves (33) and pressure sensors (34) installed on the delivery pipeline (32).

9. A lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 1, characterized in that: The convenient maintenance mechanism (4) includes guide sliders (43) symmetrically installed on both sides of the side plate body (11), guide grooves (45) symmetrically opened on both sides of the inner wall of the device housing (1) for sliding cooperation with the guide sliders (43), positioning blocks (44) installed on the surface of the guide sliders (43), and positioning slots (46) opened on the inner wall of the guide grooves (45) for engaging with the positioning blocks (44).

10. A lithium battery protection device integrating heat dissipation and fire extinguishing functions according to claim 9, characterized in that: The convenient maintenance mechanism (4) also includes four fixing blocks (41) symmetrically installed on the outer surfaces of both sides of the side plate body (11), and a nail body (42) set on the surface of the fixing block (41) for connecting the fixing block (41) and the device housing (1). One end of the nail body (42) passes through the fixing block (41) and is threadedly fastened to the screw hole on the surface of the device housing (1).

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