Lithium battery with high-temperature protection structure and working method thereof

Abstract

The invention belongs to the technical field of batteries, and discloses a lithium battery with a high-temperature protection structure and a working method thereof.The lithium battery comprises a lithium battery body, a protection box is arranged outside the lithium battery body, a protection cover is installed at the top end of the protection box, and a heat dissipation assembly is arranged in the protection box; a motor can be started to drive a first rotating shaft to rotate, and the first rotating shaft rotates to drive a cooling fan to rotate, so that external air circulates through a hollow cavity in the protection box and enters the protection box through a first cooling hole and a second cooling hole, the lithium battery body is cooled, and the situation that in the actual use process, the lithium battery body is damaged due to the cooling effect is avoided. The problems that the protection box needs to be placed on a platform, heat dissipation holes in the bottom of the protection box can be blocked by the platform, the heat dissipation effect is affected, and finally the protection effect on the lithium battery body is affected are solved, the high-temperature protection effect of the lithium battery body is guaranteed, and the safety of the lithium battery body is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a lithium battery with a high temperature protection structure and a working method thereof. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. The working principle is based on the movement of lithium ions. During the charging and discharging process, lithium ions move between the positive and negative electrodes to achieve the storage and release of electrical energy.

[0003] Lithium batteries produce electrothermal effects during the charging and discharging process. If the temperature is too high, it will not only affect its performance, but may also cause safety accidents due to thermal runaway. Therefore, high temperature protection for lithium batteries helps ensure its stable operation and extend its service life.

[0004] After searching, such as the Chinese authorized patent: CN216903059U, a lithium battery high-temperature protection structure, including an explosion-proof box, an inner liner, a lithium battery, an explosion-proof cover, a fan, an air inlet pipe, a wire tube, a heat-conducting column, a dry powder filling layer, a heat-conducting plate, a seal, a dry powder box and a heat dissipation hole; the structure is ingenious, and the dry powder filling cavity between the inner liner and the explosion-proof box is filled with a dry powder filling layer. When the lithium battery explodes and spontaneously combusts, the explosion-proof box can effectively avoid splashing. After the inner liner is damaged, the dry powder in the dry powder filling cavity will contact the lithium battery, which is conducive to the extinguishing of open flames, greatly reducing the occurrence of losses to people's lives and property caused by spontaneous combustion of lithium batteries. The device structure is ingenious, which improves the safety of lithium batteries during use and is easy to promote.

[0005] In the current protection structure, although the high-temperature protection needs of lithium batteries have been taken into consideration, in actual use, the protection box needs to be placed on a platform, and the heat dissipation holes at the bottom of the protection box will be blocked by the platform, resulting in the heat dissipation effect being affected, which ultimately affects the protection effect of the lithium battery. Summary of the invention

[0006] The object of the present invention is to provide a lithium battery with a high temperature protection structure and a working method thereof, so as to solve the problems raised in the above background technology.

[0007] In order to achieve the above object, the present invention provides the following technical solution: a lithium battery with a high temperature protection structure, comprising a lithium battery body, a protection box is arranged outside the lithium battery body, a protection cover is installed on the top of the protection box, and a heat dissipation component is arranged inside the protection box;

[0008] Among them, the heat dissipation component includes a heat dissipation fan arranged inside the protective box, a first rotating shaft is fixedly installed inside the heat dissipation fan, a motor is installed at one end of the first rotating shaft, a first heat dissipation hole and a second heat dissipation hole are opened on the inner wall of the protective box, and a control component is arranged inside the protective box.

[0009] As a further technical solution of the present invention, a cooling plate is installed inside the protective box.

[0010] As a further technical solution of the present invention, the control component includes a first bevel gear arranged inside the protective box, the first bevel gear is fixedly installed at one end of the first rotating shaft, one side of the first bevel gear is meshingly connected with the second bevel gear, one side of the second bevel gear is fixedly connected with the second rotating shaft, the end of the second rotating shaft away from the second bevel gear is fixedly installed with a rotating plate, the inner wall of the rotating plate is fixedly installed with a connecting shaft, one end of the connecting shaft is provided with a movable plate, the end of the movable plate away from the connecting shaft is hinged with a connecting rod, the connecting rod is slidably installed inside the limit block, the limit block is fixedly installed inside the protective box, the end of the connecting rod away from the movable plate is fixedly connected with the connecting plate, the top of the connecting plate is fixedly installed with a baffle, and the baffle is arranged on one side of the first heat dissipation hole.

[0011] As a further technical solution of the present invention, second bevel gears are meshedly connected on both sides of the first bevel gear, and the two second bevel gears are symmetrically distributed.

[0012] As a further technical solution of the present invention, a sliding groove is provided inside the movable plate, and the sliding groove is slidably connected to the connecting shaft.

[0013] As a further technical solution of the present invention, a protrusion is arranged inside the baffle, a limit plate is fixedly mounted on one end of the protrusion, and a spring is arranged on one side of the limit plate.

[0014] As a further technical solution of the present invention, two protrusions are symmetrically arranged and the two protrusions are symmetrically distributed.

[0015] As a further technical solution of the present invention, a wire passage groove is provided inside the protective cover.

[0016] As a further technical solution of the present invention, an isolation rod is fixedly installed on the top of the protective cover, and two isolation rods are symmetrically arranged.

[0017] A method for operating a lithium battery with a high temperature protection structure comprises the following steps:

[0018] S1: When using this device, first put the lithium battery body into the protective box, then pass the connecting wire of the lithium battery body through the wire slot, and then cover the protective cover on the protective box and connect it with bolts;

[0019] S2: During the operation of the lithium battery body, the motor can be started to drive the first rotating shaft to rotate, and the rotation of the first rotating shaft drives the cooling fan to rotate, and the external air flows through the hollow chamber inside the protection box and enters the protection box from the first heat dissipation hole and the second heat dissipation hole, and can be used in conjunction with the cooling sheet to cool the lithium battery body to achieve high temperature protection;

[0020] S3: When the first rotating shaft rotates, it drives the first bevel gear to rotate, the rotation of the first bevel gear drives the rotation of the second bevel gear, the rotation of the second bevel gear drives the rotation of the second rotating shaft, the rotation of the second rotating shaft drives the rotation of the rotating plate, the rotation of the rotating plate drives the connecting shaft to rotate, so that the connecting shaft slides a certain distance inside the slide groove and then drives the moving plate to move, the movement of the moving plate drives the connecting rod to slide inside the limit block, and drives the baffle to move through the connecting plate, so that the baffle moves to intermittently block the first heat dissipation hole, so that the gas in the hollow chamber in the protective box can flow smoothly to the second heat dissipation hole, and can enter the lithium battery body from the first heat dissipation hole and the second heat dissipation hole to dissipate heat in all directions.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention provides a heat dissipation component. When the lithium battery body needs to be cooled, the motor can be started to drive the first rotating shaft to rotate. The rotation of the first rotating shaft drives the cooling fan to rotate, so that the external gas flows through the hollow chamber inside the protective box and enters the protective box through the first heat dissipation hole and the second heat dissipation hole, thereby dissipating the heat of the lithium battery body. This avoids the problem that during actual use, the protective box needs to be placed on a platform, and the heat dissipation holes at the bottom of the protective box will be blocked by the platform, resulting in the heat dissipation effect being affected, which ultimately affects the protection effect of the lithium battery body. This ensures the high-temperature protection effect of the lithium battery body and improves the safety of the lithium battery body.

[0023] 2. The present invention controls the setting of the component, so that during heat dissipation, the rotation of the first rotating shaft drives the rotation of the first bevel gear, the rotation of the first bevel gear drives the rotation of the second bevel gear, the rotation of the second bevel gear drives the rotation of the second rotating shaft, the rotation of the second rotating shaft drives the rotation of the rotating plate, the rotation of the rotating plate drives the rotation of the connecting shaft, the rotation of the connecting shaft drives the movement of the movable plate, the movement of the movable plate drives the connecting rod to slide inside the limit block, and drives the baffle to move through the connecting plate, so that the baffle moves intermittently to block the first heat dissipation hole, so that the gas in the hollow chamber in the protective box can flow smoothly to the second heat dissipation hole, dissipate the heat of the tail of the lithium battery body, and dissipate the heat of the lithium battery body in multiple directions, thereby further improving the heat dissipation effect.

[0024] 3. The present invention drives the protrusion to move by moving the baffle. When the protrusion moves to one side of the first heat dissipation hole, the elastic potential energy of the spring can make the protrusion embed into the first heat dissipation hole to clean the dust and impurities inside, thereby preventing dust from clogging the first heat dissipation hole after a period of use and affecting the cooling effect, thereby ensuring the stability of the device during heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the lithium battery body of the present invention;

[0028] Figure 4 It is a schematic cross-sectional view of the structure of the protection box of the present invention;

[0029] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement in the middle;

[0030] Figure 6 For the present invention Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0031] Figure 7 For the present invention Figure 4 Enlarged schematic diagram of the structure at point C in the middle.

[0032] In the figure: 1. lithium battery body; 2. protection box; 3. protection cover; 4. cooling fan; 5. first rotating shaft; 6. motor; 7. first heat dissipation hole; 8. second heat dissipation hole; 9. cooling plate; 10. first bevel gear; 11. second bevel gear; 12. second rotating shaft; 13. rotating plate; 14. connecting shaft; 15. slide groove; 16. moving plate; 17. connecting rod; 18. connecting plate; 19. limit block; 20. baffle; 21. bump; 22. limit plate; 23. spring; 24. wire groove; 25. isolation rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1

[0035] like Figures 1 to 7 As shown, in an embodiment of the present invention, a lithium battery with a high temperature protection structure includes a lithium battery body 1, a protection box 2 is arranged outside the lithium battery body 1, a protection cover 3 is installed on the top of the protection box 2, and a heat dissipation component is arranged inside the protection box 2;

[0036] Among them, the heat dissipation component includes a cooling fan 4 arranged inside the protective box 2, a first rotating shaft 5 is fixedly installed inside the cooling fan 4, a motor 6 is installed at one end of the first rotating shaft 5, a first heat dissipation hole 7 and a second heat dissipation hole 8 are opened on the inner wall of the protective box 2, and a control component is arranged inside the protective box 2.

[0037] The protective box 2 has a hollow chamber inside for gas circulation;

[0038] Preferably, the motor 6 can be electrically connected to the lithium battery body 1, and a control switch can be installed;

[0039] By setting the heat dissipation component, when the lithium battery body 1 needs to be cooled, the motor 6 can be started to drive the first rotating shaft 5 to rotate. The rotation of the first rotating shaft 5 drives the cooling fan 4 to rotate, so that the external air flows through the hollow chamber inside the protective box 2 and enters the protective box 2 through the first heat dissipation hole 7 and the second heat dissipation hole 8, thereby dissipating the heat of the lithium battery body 1. This avoids the need to place the protective box 2 on a platform during actual use, and the heat dissipation holes at the bottom of the protective box 2 will be blocked by the platform, resulting in the heat dissipation effect being affected, and ultimately affecting the protection effect of the lithium battery body 1. The high-temperature protection effect of the lithium battery body 1 is ensured, and the safety of the lithium battery body 1 is improved.

[0040] like Figure 4 As shown, a cooling sheet 9 is installed inside the protective box 2.

[0041] During heat dissipation, the cooling sheet 9 can be used to cool the gas flowing inside the hollow chamber, thereby reducing the temperature of the gas flowing inside and improving the heat dissipation effect of the device.

[0042] like Figures 1 to 7 As shown, the control component includes a first bevel gear 10 arranged inside the protective box 2, the first bevel gear 10 is fixedly mounted on one end of the first rotating shaft 5, one side of the first bevel gear 10 is meshedly connected with the second bevel gear 11, one side of the second bevel gear 11 is fixedly connected with the second rotating shaft 12, the end of the second rotating shaft 12 away from the second bevel gear 11 is fixedly mounted with a rotating plate 13, the inner wall of the rotating plate 13 is fixedly mounted with a connecting shaft 14, one end of the connecting shaft 14 is provided with a movable plate 16, the end of the movable plate 16 away from the connecting shaft 14 is hinged with a connecting rod 17, the connecting rod 17 is slidably mounted inside the limit block 19, the limit block 19 is fixedly mounted inside the protective box 2, the end of the connecting rod 17 away from the movable plate 16 is fixedly connected with a connecting plate 18, the top of the connecting plate 18 is fixedly mounted with a baffle 20, and the baffle 20 is arranged on one side of the first heat dissipation hole 7.

[0043] Through the setting of the control component, during heat dissipation, the rotation of the first rotating shaft 5 drives the rotation of the first bevel gear 10, the rotation of the first bevel gear 10 drives the rotation of the second bevel gear 11, the rotation of the second bevel gear 11 drives the rotation of the second rotating shaft 12, the rotation of the second rotating shaft 12 drives the rotation of the rotating plate 13, the rotation of the rotating plate 13 drives the rotation of the connecting shaft 14, the rotation of the connecting shaft 14 drives the moving plate 16 to move, the movement of the moving plate 16 drives the connecting rod 17 to slide inside the limit block 19, and drives the baffle 20 to move through the connecting plate 18, so that the baffle 20 intermittently moves to block the first heat dissipation hole 7, so that the gas in the hollow chamber in the protective box 2 can flow smoothly to the second heat dissipation hole 8, dissipate the heat to the tail of the lithium battery body 1, and dissipate the heat in multiple directions for the lithium battery body 1, thereby further improving the heat dissipation effect.

[0044] like Figure 4 and Figure 5 As shown, both sides of the first bevel gear 10 are meshedly connected with the second bevel gears 11 , and the two second bevel gears 11 are symmetrically distributed.

[0045] When the first bevel gear 10 rotates, the two second bevel gears 11 rotate in opposite directions, so that the two sets of baffles 20 on both sides of the protective box 2 move intermittently, ensuring that the internal cooling gas can continuously enter the protective box 2 from the first heat dissipation holes 7 and the second heat dissipation holes 8 to cool the lithium battery body 1, thereby increasing the cooling area of ​​the cooling gas.

[0046] like Figure 4 and Figure 7 As shown, a sliding groove 15 is provided inside the movable plate 16 , and the sliding groove 15 is slidably connected to the connecting shaft 14 .

[0047] When the rotating plate 13 rotates, the connecting shaft 14 slides a certain distance inside the slide groove 15 and then drives the slide groove 15 to move, so that the baffle 20 stays for a period of time after moving to the side wall of the connecting rod 17, which facilitates the smooth circulation of the internal gas and allows it to have enough time to flow to the second heat dissipation hole 8, thereby improving the stability and reliability of heat dissipation.

[0048] like Figure 7 As shown, a protrusion 21 is provided inside the baffle 20 , a limiting plate 22 is fixedly mounted on one end of the protrusion 21 , and a spring 23 is provided on one side of the limiting plate 22 .

[0049] When the baffle 20 moves, it drives the protrusion 21 to move. When the protrusion 21 moves to the side of the first heat dissipation hole 7, the elastic potential energy of the spring 23 can make the protrusion 21 embedded in the first heat dissipation hole 7, so as to clean the dust and impurities inside, thereby preventing dust from clogging the first heat dissipation hole 7 after a period of use, thereby affecting the cooling effect, so as to ensure the stability of the device during heat dissipation.

[0050] like Figure 7 As shown, two protrusions 21 are symmetrically arranged, and the two protrusions 21 are symmetrically distributed.

[0051] The inner walls of the first heat dissipation hole 7 facing inward and outward are cleaned, and the elastic potential energy of the spring 23 can produce a knocking effect to help dust or impurities fall from the inside.

[0052] like Figures 1 to 3 As shown, a wire passing groove 24 is provided inside the protective cover 3 .

[0053] When the lithium battery body 1 is installed, the connecting wires of the lithium battery body 1 can be passed through the wire groove 24 to facilitate wiring.

[0054] like Figures 1 to 3 As shown, an isolation rod 25 is fixedly mounted on the top of the protective cover 3, and two isolation rods 25 are symmetrically arranged.

[0055] When placing the protection box 2, the protection box 2 can be stacked for use, thereby improving the practicability of the protection device, and each isolation rod 25 is configured as a handle to facilitate taking and placing the protection cover 3, thereby improving convenience during operation.

[0056] A method for operating a lithium battery with a high temperature protection structure comprises the following steps:

[0057] S1: When using the device, first put the lithium battery body 1 into the protective box 2, then pass the connecting wire of the lithium battery body 1 through the wire groove 24, and then cover the protective cover 3 on the protective box 2 and connect it with bolts;

[0058] S2: During the operation of the lithium battery body 1, the motor 6 can be started to drive the first rotating shaft 5 to rotate, and the rotation of the first rotating shaft 5 drives the cooling fan 4 to rotate, and the external air flows through the hollow chamber inside the protection box 2 and enters the protection box 2 from the first heat dissipation hole 7 and the second heat dissipation hole 8, and can be used in conjunction with the cooling sheet 9 to cool the lithium battery body 1 to achieve high temperature protection;

[0059] S3: When the first rotating shaft 5 rotates, it drives the first bevel gear 10 to rotate. The rotation of the first bevel gear 10 drives the rotation of the second bevel gear 11. The rotation of the second bevel gear 11 drives the rotation of the second rotating shaft 12. The rotation of the second rotating shaft 12 drives the rotation of the rotating plate 13. The rotation of the rotating plate 13 drives the connecting shaft 14 to rotate, so that the connecting shaft 14 slides a certain distance inside the slide groove 15 and then drives the movable plate 16 to move. The movement of the movable plate 16 drives the connecting rod 17 to slide inside the limit block 19, and drives the baffle 20 to move through the connecting plate 18, so that the baffle 20 moves to intermittently block the first heat dissipation hole 7, so that the gas in the hollow chamber in the protective box 2 can flow smoothly to the second heat dissipation hole 8, and can enter the lithium battery body 1 from the first heat dissipation hole 7 and the second heat dissipation hole 8 to dissipate heat in all directions.

[0060] Working principle and usage process:

[0061] When using the device, first put the lithium battery body 1 into the protective box 2, then pass the connecting wire of the lithium battery body 1 through the wire groove 24, and then cover the protective cover 3 on the protective box 2 and connect it with bolts;

[0062] During the operation of the lithium battery body 1, the motor 6 can be started to drive the first rotating shaft 5 to rotate, and the rotation of the first rotating shaft 5 drives the cooling fan 4 to rotate, and the external air flows through the hollow chamber inside the protection box 2 and enters the protection box 2 from the first heat dissipation hole 7 and the second heat dissipation hole 8, and can be used in conjunction with the cooling sheet 9 to cool the lithium battery body 1 to achieve high temperature protection;

[0063] At the same time, the rotation of the first rotating shaft 5 drives the rotation of the first bevel gear 10, the rotation of the first bevel gear 10 drives the rotation of the second bevel gear 11, the rotation of the second bevel gear 11 drives the rotation of the second rotating shaft 12, the rotation of the second rotating shaft 12 drives the rotation of the rotating plate 13, the rotation of the rotating plate 13 drives the connecting shaft 14 to rotate, so that the connecting shaft 14 slides a distance inside the slide groove 15 and then drives the moving plate 16 to move, the movement of the moving plate 16 drives the connecting rod 17 to slide inside the limit block 19, and drives the baffle 20 to move through the connecting plate 18, so that the baffle 20 moves to intermittently block the first heat dissipation hole 7, so that the gas in the hollow chamber in the protective box 2 can flow smoothly to the second heat dissipation hole 8, and can enter the lithium battery body 1 from the first heat dissipation hole 7 and the second heat dissipation hole 8 to dissipate heat in all directions.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery with a high temperature protection structure, comprising a lithium battery body (1), characterized in that: A protective box (2) is arranged outside the lithium battery body (1), a protective cover (3) is installed on the top of the protective box (2), and a heat dissipation component is arranged inside the protective box (2); The heat dissipation component comprises a heat dissipation fan (4) arranged inside the protective box (2), a first rotating shaft (5) is fixedly installed inside the heat dissipation fan (4), a motor (6) is installed at one end of the first rotating shaft (5), a first heat dissipation hole (7) and a second heat dissipation hole (8) are opened on the inner wall of the protective box (2), and a control component is arranged inside the protective box (2).

2. A lithium battery with a high temperature protection structure according to claim 1, characterized in that: A cooling sheet (9) is installed inside the protection box (2).

3. The lithium battery with a high temperature protection structure according to claim 1, characterized in that: The control assembly comprises a first bevel gear (10) arranged inside the protective box (2), the first bevel gear (10) being fixedly mounted on one end of a first rotating shaft (5), one side of the first bevel gear (10) being meshedly connected with a second bevel gear (11), one side of the second bevel gear (11) being fixedly connected with a second rotating shaft (12), a rotating plate (13) being fixedly mounted on one end of the second rotating shaft (12) away from the second bevel gear (11), and a connecting shaft (14) being fixedly mounted on the inner wall of the rotating plate (13), A movable plate (16) is provided at one end of the connecting shaft (14); a connecting rod (17) is hingedly connected to the end of the movable plate (16) away from the connecting shaft (14); the connecting rod (17) is slidably mounted inside a limit block (19); the limit block (19) is fixedly mounted inside the protective box (2); a connecting plate (18) is fixedly connected to the end of the connecting rod (17) away from the movable plate (16); a baffle (20) is fixedly mounted on the top of the connecting plate (18); and the baffle (20) is arranged on one side of the first heat dissipation hole (7).

4. The lithium battery with a high temperature protection structure according to claim 3, characterized in that: The first bevel gear (10) is meshedly connected to the second bevel gear (11) on both sides, and the two second bevel gears (11) are symmetrically distributed.

5. The lithium battery with a high temperature protection structure according to claim 3, characterized in that: A sliding groove (15) is provided inside the movable plate (16), and the sliding groove (15) is slidably connected to the connecting shaft (14).

6. The lithium battery with a high temperature protection structure according to claim 3, characterized in that: A protrusion (21) is arranged inside the baffle (20), a limiting plate (22) is fixedly mounted on one end of the protrusion (21), and a spring (23) is arranged on one side of the limiting plate (22).

7. A lithium battery with a high temperature protection structure according to claim 6, characterized in that: Two of the convex blocks (21) are symmetrically arranged, and the two convex blocks (21) are symmetrically distributed.

8. The lithium battery with a high temperature protection structure according to claim 1, characterized in that: A wire passing groove (24) is provided inside the protective cover (3).

9. The lithium battery with a high temperature protection structure according to claim 1, characterized in that: An isolation rod (25) is fixedly mounted on the top of the protective cover (3), and two isolation rods (25) are symmetrically arranged.

10. A method for operating a lithium battery with a high temperature protection structure, the method being applicable to the lithium battery with a high temperature protection structure as claimed in claims 1 to 9, characterized in that: The following steps are involved: S1: When using the device, firstly, place the lithium battery body (1) into the protective box (2), then pass the connecting wire of the lithium battery body (1) through the wire slot (24), and then cover the protective cover (3) on the protective box (2) and connect them by bolts; S2: During the operation of the lithium battery body (1), the motor (6) can be started to drive the first rotating shaft (5) to rotate, and the rotation of the first rotating shaft (5) drives the cooling fan (4) to rotate, and the external air flows through the hollow chamber inside the protection box (2) and enters the protection box (2) from the first heat dissipation hole (7) and the second heat dissipation hole (8), and can be used in conjunction with the cooling sheet (9) to cool the lithium battery body (1) to achieve high temperature protection; S3: When the first rotating shaft (5) rotates, it drives the first bevel gear (10) to rotate, the rotation of the first bevel gear (10) drives the second bevel gear (11) to rotate, the rotation of the second bevel gear (11) drives the second rotating shaft (12) to rotate, the rotation of the second rotating shaft (12) drives the rotation of the rotating plate (13), the rotation of the rotating plate (13) drives the connecting shaft (14) to rotate, so that the connecting shaft (14) slides a certain distance inside the sliding groove (15) and then drives the moving shaft (14) to rotate. The movable plate (16) moves, and the movement of the movable plate (16) drives the connecting rod (17) to slide inside the limit block (19), and drives the baffle (20) to move through the connecting plate (18), so that the baffle (20) moves to intermittently block the first heat dissipation hole (7), so that the gas in the hollow chamber in the protective box (2) can flow smoothly to the second heat dissipation hole (8), and can enter the lithium battery body (1) from the first heat dissipation hole (7) and the second heat dissipation hole (8), so as to dissipate heat in all directions.

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