Lithium battery with protection device

Abstract

The invention discloses a lithium battery with a protection device, and relates to the technical field of lithium batteries, the lithium battery with the protection device comprises a shell, the shell is internally provided with a lithium battery, the left and right sides of the shell are provided with spring plates, the bottom of the lithium battery is provided with a damping mechanism, and the shell is internally provided with a heat dissipation mechanism. And a fireproof mechanism is arranged at the top of the lithium battery. According to the invention, when the lithium battery falls or collides accidentally, a damping spring and a buffer plate buffer impact force, the lithium battery moves upwards to drive a power rod to move upwards, the power rod moves upwards to collide with a rotating rod, the rotating rod rotates downwards, and the rotating rod rotates downwards to drive a contact rod to move downwards; and the contact rod moves downwards to be in contact with the clamping inclined surface to push the clamping inclined surface to move towards the power plug to clamp the power line, so that the power plug is prevented from loosening in the collision process, and the reduction of the power output efficiency of the lithium battery is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and specifically relates to a lithium battery with a protection device. Background Art

[0002] A lithium battery is a type of battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution. Most current lithium batteries are directly protected by a casing. Once impacted, it is possible to cause vibration at the connection of the lithium battery, resulting in the power plug becoming loose.

[0003] The patent with the patent announcement number CN112510298B relates to a lithium battery with a protection device, including a cutting workbench, including a battery placement casing. The upper surface of the battery placement casing is fixedly installed with a casing top cover. The upper surface of the casing top cover is fixedly installed with a circuit control board. A positive electrode guide post is arranged at a position on the front side of the circuit control board, and a negative electrode guide post is arranged at a position on the other front side of the circuit control board. The described lithium battery with a protection device in this patent constitutes a device structure for protecting the lithium battery unit. When the lithium battery is impacted, through the elastic buffering of the support spring and the buffer rubber block, it can buffer and protect the lithium battery unit, preventing the lithium battery from being damaged. When the lithium battery generates heat during operation, air is blown out through the fan fixing box, and then through the fan mounting plate and the wind direction diversion block, the air is guided to the heat dissipation fins, thereby dissipating the heat generated by the lithium battery and enabling the battery to operate stably.

[0004] In the above patent, when the lithium battery is impacted, through the elastic buffering of the support spring and the buffer rubber block, it can buffer and protect the lithium battery unit, preventing the lithium battery from being damaged. When the lithium battery generates heat during operation, air is blown out through the fan fixing box, and then through the fan mounting plate and the wind direction diversion block, the air is guided to the heat dissipation fins, thereby dissipating the heat generated by the lithium battery and enabling the battery to operate stably. However, when a collision occurs, the power plug of the plug-in lithium battery may become loose, resulting in poor contact between the electrical appliance and the lithium battery, reducing the power output efficiency of the lithium battery, and thus also affecting the use safety of the lithium battery. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a lithium battery with a protection device, which solves the problems raised in the above background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A lithium battery with a protection device, including a casing, a lithium battery is arranged inside the casing, spring plates are arranged on both left and right sides of the casing, a shock absorption mechanism is arranged at the bottom of the lithium battery, a heat dissipation mechanism is arranged inside the casing, and a fire prevention mechanism is arranged at the top of the lithium battery; Among them, the shock absorption mechanism includes a shock absorption spring, a buffer plate, a power rod, a rotating rod, a fixed shaft, a fixed rod, a contact rod, a clamping inclined plane, a U-shaped rod and a power supply interface. The buffer plate is slidably installed at the inner bottom end of the housing. One end of the shock absorption spring is fixedly installed at the inner bottom end of the housing, and the other end of the shock absorption spring is fixedly installed at the bottom end of the buffer plate. The lithium battery is fixedly installed at the top of the buffer plate. The power rod is fixedly installed at the top of the lithium battery. The fixed rod is fixedly installed on the inner wall of the housing. The fixed shaft is fixedly installed on the left side surface of the fixed rod. The rotating rod is rotatably installed on the circumferential surface of the fixed shaft. The contact rod is fixedly installed on the right side surface of the rotating rod. The power supply interface is fixedly installed on the top of the lithium battery. The U-shaped rod is fixedly installed on the left and right side surfaces of the power supply interface. The clamping inclined plane is slidably installed on the top of the U-shaped rod. When the power rod moves upward and collides with the rotating rod, the rotating rod rotates downward. The downward rotation of the rotating rod drives the contact rod to move downward. The downward movement of the contact rod contacts the clamping inclined plane and pushes the clamping inclined plane to move towards the direction close to the power plug.

[0007] According to the above technical solution, a torsion spring is arranged inside the rotating rod to reset the rotating rod. The contact rod contacts the clamping inclined plane and provides a thrust for the clamping inclined plane.

[0008] According to the above technical solution, there are two groups of the clamping inclined planes to make the fixation of the power cord by the clamping inclined planes more stable. There are two groups of contact rods on the rotating rod and they have a height difference to ensure that the two groups of contact rods contact the clamping inclined planes simultaneously. An air inlet and an air outlet are opened on the housing to keep the internal air pressure stable.

[0009] According to the above technical solution, the heat dissipation mechanism includes a heat sensor, an intake fan, a vibrating rod, a column, a rotating shaft, an arc-shaped convex block, a compression spring, an elastic telescopic rod, a U-shaped door closing rod, a dust-proof door, a filter screen and a vibrating block. The heat sensor is fixedly installed on the inner wall of the housing. The intake fan is fixedly installed on the inner wall of the housing where the air inlet is opened. The vibrating rod is fixedly installed on the buffer plate. The column is fixedly installed on the bottom cross-section of the air inlet. The rotating shaft is fixedly installed on the column. The arc-shaped convex block is rotatably installed on the circumferential surface of the rotating shaft. One end of the compression spring is fixedly installed on the side of the air inlet. The U-shaped door closing rod is fixedly installed at the other end of the compression spring. One end of the elastic telescopic rod is fixedly installed on the side of the air inlet. The other end of the elastic telescopic rod is fixedly installed on the U-shaped door closing rod. The dust-proof door is rotatably installed on the side of the air inlet. The filter screen is fixedly installed inside the air inlet. The vibrating block is fixedly installed on the filter screen. When the contact between the arc-shaped convex block and the U-shaped door closing rod is disengaged, the compression spring pushes the U-shaped door closing rod to pop out. The short rod in the U-shaped door closing rod contacts the dust-proof door and pushes the dust-proof door to close.

[0010] According to the above technical solution, a heat dissipation port is opened at the right end of the air inlet to ensure stable internal air pressure. The thermal sensor is electrically connected to the intake fan and the heat dissipation fan, and the thermal sensor controls the switch of the heat dissipation fan. A torsion spring is arranged inside the arc-shaped bump, and the torsion spring resets the arc-shaped bump.

[0011] According to the above technical solution, one end of the U-shaped door closing rod close to the dust-proof door is a short rod, and the end far from the dust-proof door is a long rod to ensure that the U-shaped door closing rod can play a role in closing the door. The arc-shaped bump is in horizontal contact with the long rod of the U-shaped door closing rod, and the arc-shaped bump provides resistance to the U-shaped door closing rod. The bottom end of the long rod of the U-shaped door closing rod is set as an inclined plane. When the arc-shaped bump resets, it simultaneously pushes the U-shaped door closing rod to reset. A plurality of vibration blocks are arranged, and the length of the vibration blocks gradually increases downward, so that the arc-shaped bump can intermittently knock on the filter screen during the moving process.

[0012] According to the above technical solution, the fire prevention mechanism includes a return spring, a bullet block, a connecting rod, a fuse, a stand, a fire extinguishing tank, a valve, a starting rod, a push plate, a limiting rod and a U-shaped baffle. The return spring is fixedly installed on the top of the lithium battery. One end of the connecting rod is slidably installed on the top of the lithium battery, and the other end of the connecting rod is fixedly installed on the left and right sides of the bullet block. The stand is fixedly installed at the front end of the connecting rod. The fuse is fixedly installed on both sides of the stand. The fire extinguishing tank is fixedly installed on the top of the housing. The valve is fixedly installed at the bottom end of the fire extinguishing tank. The starting rod is fixedly installed at the control end of the valve. The push plate is slidably installed on the top of the side of the housing. The upper end of the limiting rod is slidably installed on the top of the housing. The limiting groove is opened at the top of the U-shaped baffle. The lower end of the limiting rod is slidably installed in the limiting groove. The U-shaped baffle is slidably installed on the left side of the housing. When the bullet block moves upward, it pushes the starting rod to rotate, the valve opens, and the fire extinguishing gas sprays out. At the same time, when the bullet block moves upward, it contacts the push plate, and the push plate moves to the left. The push plate moving to the left pushes the limiting rod to release the limit, and the U-shaped baffle falls and closes the heat dissipation port and the air inlet at the same time.

[0013] According to the above technical solution, a protective shell is arranged outside the fuse to protect the fuse. The push plate is on the movement track of the bullet block, and the bullet block provides a thrust to the push plate.

[0014] The present invention provides a lithium battery with a protection device, having the following beneficial effects: (1)When the lithium battery accidentally drops or collides, the shock-absorbing spring and the buffer plate buffer the impact force. At the same time, the upward movement of the lithium battery drives the power rod to move upward. The upward movement of the power rod collides with the rotating rod, causing the rotating rod to rotate downward. The downward rotation of the rotating rod drives the contact rod to move downward. The downward movement of the contact rod contacts the clamping inclined surface and pushes the clamping inclined surface to move towards the power plug, clamping the power cord to prevent the power plug from loosening during the collision, resulting in a decrease in the power output efficiency of the lithium battery.

[0015] (2)When the internal temperature of the lithium battery rises to the preset temperature threshold of the thermal sensor during continuous operation, the cooling fan is turned on to dissipate heat from the lithium battery. At the same time, if a collision occurs when the intake fan is working, the vibration rod moves upward and contacts the arc-shaped convex block. The end of the arc-shaped convex block contacts the vibration block on the filter screen to remove the impurities attached to the filter screen. At the same time, the contact between the arc-shaped convex block and the U-shaped closing rod is disengaged, and the compression spring pushes the U-shaped closing rod to pop out. The short rod in the U-shaped closing rod contacts the dust-proof door and pushes the dust-proof door to close, preventing the impurities on the filter screen from entering the inside of the lithium battery and the housing, and preventing the impurities from contacting the internal structure and causing a decrease in the discharge efficiency of the lithium battery.

[0016] (3)When a fire breaks out inside the housing due to an accident such as a short circuit in the lithium battery, the fuse melts, and the reset spring pops out and pushes the elastic block upward. The upward movement of the elastic block drives the starting rod to rotate, and the valve opens, spraying out the fire extinguishing gas. At the same time, the upward movement of the elastic block contacts the push plate, and the push plate moves to the left. The leftward movement of the push plate pushes the limiting rod to release the limit, and the U-shaped baffle falls and closes the heat dissipation port and the intake port at the same time, cutting off the outside oxygen and making the fire extinguishing efficiency of the fire extinguishing gas higher. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure section and part of the shock-absorbing mechanism of the present invention; Figure 3 It is a schematic diagram of the structure of the shock-absorbing mechanism of the present invention; Figure 4 It is of the present invention Figure 3 The enlarged schematic diagram of the structure of part A in Figure 5 It is a schematic diagram of the overall structure section and part of the heat dissipation mechanism of the present invention; Figure 6 It is a schematic diagram of the structure of the heat dissipation mechanism of the present invention; Figure 7 It is a schematic diagram of the specific structure in the heat dissipation mechanism of the present invention; Figure 8 It is a schematic diagram of the fire prevention mechanism of the present invention; Figure 9For the present invention Figure 8 Schematic enlarged view of the structure of part B in the present invention.

[0018] In the figure: 1, outer shell; 2, lithium battery; 3, spring plate; 401, shock-absorbing spring; 402, buffer plate; 403, power rod; 404, rotating rod; 405, fixed shaft; 406, fixed rod; 407, contact rod; 408, clamping inclined plane; 409, U-shaped rod; 410, power supply interface; 501, thermal sensor; 502, intake fan; 503, vibration rod; 504, column; 505, rotating shaft; 506, arc-shaped convex block; 507, compression spring; 508, elastic telescopic rod; 509, U-shaped door-closing rod; 510, dust-proof door; 511, filter screen; 512, vibration block; 601, reset spring; 602, elastic block; 603, connecting rod; 604, fuse; 605, stand; 606, fire extinguishing tank; 607, valve; 608, starting rod; 609, push plate; 610, limiting rod; 611, U-shaped baffle. Specific implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-9 , a lithium battery with a protection device, including an outer shell 1, a lithium battery 2 is arranged inside the outer shell 1, spring plates 3 are arranged on both left and right sides of the outer shell 1, a shock-absorbing mechanism is arranged at the bottom of the lithium battery 2, a heat dissipation mechanism is arranged inside the outer shell 1, and a fire prevention mechanism is arranged on the top of the lithium battery 2; Among them, the shock-absorbing mechanism includes a shock-absorbing spring 401, a buffer plate 402, a power rod 403, a rotating rod 404, a fixed shaft 405, a fixed rod 406, a contact rod 407, a clamping inclined plane 408, a U-shaped rod 409 and a power supply interface 410. The buffer plate 402 is slidably installed at the inner bottom end of the housing 1. One end of the shock-absorbing spring 401 is fixedly installed at the inner bottom end of the housing 1, and the other end of the shock-absorbing spring 401 is fixedly installed at the bottom of the buffer plate 402. The lithium battery 2 is fixedly installed at the top of the buffer plate 402. The power rod 403 is fixedly installed at the top of the lithium battery 2. The fixed rod 406 is fixedly installed on the inner wall of the housing 1. The fixed shaft 405 is fixedly installed on the left side surface of the fixed rod 406. The rotating rod 404 is rotatably installed on the circumferential surface of the fixed shaft 405. The contact rod 407 is fixedly installed on the right side surface of the rotating rod 404. The power supply interface 410 is fixedly installed on the top of the lithium battery 2. The U-shaped rod 409 is fixedly installed on the left and right side surfaces of the power supply interface 410. The clamping inclined plane 408 is slidably installed on the top of the U-shaped rod 409 to clamp the power cord and prevent the power plug from loosening during the collision, resulting in a reduction in the power output efficiency of the lithium battery 2.

[0021] A torsion spring is arranged inside the rotating rod 404 to reset the rotating rod 404. The contact rod 407 contacts the clamping inclined plane 408, and the contact rod 407 provides a thrust force for the clamping inclined plane 408.

[0022] There are two groups of clamping inclined planes 408 to make the fixation of the power cord by the clamping inclined planes 408 more stable. There are two groups of contact rods 407 on the rotating rod 404 with a height difference to ensure that the two groups of contact rods 407 are in contact with the clamping inclined planes 408 at the same time. An air inlet and an air outlet are provided on the housing 1 to keep the internal air pressure stable.

[0023] The heat dissipation mechanism includes a thermal sensor 501, an intake fan 502, a vibration rod 503, a column 504, a rotating shaft 505, an arc-shaped convex block 506, a compression spring 507, an elastic telescopic rod 508, a U-shaped door closing rod 509, a dust-proof door 510, a filter screen 511 and a vibration block 512. The thermal sensor 501 is fixedly installed on the inner wall of the housing 1. The intake fan 502 is fixedly installed on the inner wall of the housing 1 provided with an air inlet. The vibration rod 503 is fixedly installed on the buffer plate 402. The column 504 is fixedly installed on the bottom cross-section of the air inlet. The rotating shaft 505 is fixedly installed on the column 504. The arc-shaped convex block 506 is rotatably installed on the circumferential surface of the rotating shaft 505. One end of the compression spring 507 is fixedly installed on the side of the air inlet. The U-shaped door closing rod 509 is fixedly installed on the other end of the compression spring 507. One end of the elastic telescopic rod 508 is fixedly installed on the side of the air inlet. The other end of the elastic telescopic rod 508 is fixedly installed on the U-shaped door closing rod 509. The dust-proof door 510 is rotatably installed on the side of the air inlet. The filter screen 511 is fixedly installed inside the air inlet. The vibration block 512 is fixedly installed on the filter screen 511. The short rod in the U-shaped door closing rod 509 contacts the dust-proof door 510 and pushes the dust-proof door 510 to close, preventing impurities on the filter screen 511 from entering the interior of the lithium battery 2 and the housing 1, and preventing the impurities from contacting the internal structure and causing a decrease in the discharge efficiency of the lithium battery 2.

[0024] A heat dissipation port is provided at the right end of the air inlet to ensure stable internal air pressure. The thermal sensor 501 is electrically connected to the intake fan 502 (the heat dissipation fan). The thermal sensor 501 controls the switch of the heat dissipation fan. A torsion spring is provided inside the arc-shaped convex block 506, and the torsion spring resets the arc-shaped convex block 506.

[0025] One end of the U-shaped door closing rod 509 close to the dust-proof door 510 is a short rod, and the end far from the dust-proof door 510 is a long rod, ensuring that the U-shaped door closing rod 509 can play a role in closing the door. The arc-shaped convex block 506 is in horizontal contact with the long rod of the U-shaped door closing rod 509, and the arc-shaped convex block 506 provides resistance to the U-shaped door closing rod 509. The bottom end of the long rod of the U-shaped door closing rod 509 is provided with an inclined surface. When the arc-shaped convex block 506 resets, it simultaneously pushes the U-shaped door closing rod 509 to reset. Multiple groups of vibration blocks 512 are provided, and the length of the vibration blocks 512 gradually increases downward, enabling the arc-shaped convex block 506 to intermittently strike the filter screen 511 during the movement process.

[0026] The fire prevention mechanism includes a reset spring 601, a bullet block 602, a connecting rod 603, a fuse 604, a stand 605, a fire extinguishing tank 606, a valve 607, a starting rod 608, a push plate 609, a limiting rod 610 and a U-shaped baffle 611. The reset spring 601 is fixedly installed at the top of the lithium battery 2. One end of the connecting rod 603 is slidably installed at the top of the lithium battery 2, and the other end of the connecting rod 603 is fixedly installed on the left and right sides of the bullet block 602. The stand 605 is fixedly installed at the front end of the connecting rod 603. The fuse 604 is fixedly installed on the left and right sides of the stand 605. The fire extinguishing tank 606 is fixedly installed on the top of the housing 1. The valve 607 is fixedly installed at the bottom end of the fire extinguishing tank 606. The starting rod 608 is fixedly installed at the control end of the valve 607. The push plate 609 is slidably installed at the top of the side surface of the housing 1. The upper end of the limiting rod 610 is slidably installed at the top of the housing 1. The limiting groove is opened at the top of the U-shaped baffle 611. The lower end of the limiting rod 610 is slidably installed in the limiting groove. The U-shaped baffle 611 is slidably installed on the left side surface of the housing 1. When the U-shaped baffle 611 falls, it closes the heat dissipation port and the air inlet at the same time, cutting off the external oxygen and making the fire extinguishing efficiency of the fire extinguishing gas higher.

[0027] A protective shell is provided outside the fuse 604 to protect the fuse 604. The push plate 609 is on the movement track of the bullet block 602, and the bullet block 602 provides a thrust force for the push plate 609.

[0028] During operation: When the lithium battery 2 accidentally drops or collides, the shock-absorbing spring 401 and the buffer plate 402 buffer the impact force. At the same time, the lithium battery 2 moves upward, driving the power rod 403 to move upward. The power rod 403 moves upward and collides with the rotating rod 404. The rotating rod 404 rotates downward. The rotating rod 404 rotates downward and drives the contact rod 407 to move downward. The contact rod 407 moves downward and contacts the clamping inclined surface 408, pushing the clamping inclined surface 408 to move towards the power plug, clamping the power cord to prevent the power plug from loosening during the collision, resulting in a decrease in the power output efficiency of the lithium battery 2. When the internal temperature of the lithium battery 2 continues to rise during operation and reaches the preset temperature threshold of the thermal sensor 501, the cooling fan is turned on to dissipate heat from the lithium battery 2. At the same time, if a collision occurs when the intake fan 502 is working, the vibration rod 503 moves upward and contacts the arc-shaped convex block 506. The tail end of the arc-shaped convex block 506 contacts the vibration block 512 on the filter screen 511 to remove the impurities attached to the filter screen 511. At the same time, the contact between the arc-shaped convex block 506 and the U-shaped closing rod 509 is disengaged, and the compression spring 507 pushes the U-shaped closing rod 509 to pop out. The short rod in the U-shaped closing rod 509 contacts the dust-proof door 510, pushing the dust-proof door 510 to close, preventing the impurities on the filter screen 511 from entering the interior of the lithium battery 2 and the housing 1, and preventing the impurities from contacting the internal structure and causing a decrease in the discharge efficiency of the lithium battery 2. When an accident such as a short circuit occurs in the lithium battery 2 and causes a fire inside the housing, the fuse 604 melts, and the reset spring 601 pops out to push the slider 602 to move upward. The upward movement of the slider 602 drives the starting rod 608 to rotate, the valve 607 opens, and the extinguishing gas is ejected. At the same time, the upward movement of the slider 602 contacts the push plate 609, and the push plate 609 moves to the left. The leftward movement of the push plate 609 pushes the limit rod 610 to release the limit, and the U-shaped baffle 611 falls while closing the heat dissipation port and the air inlet, cutting off the outside oxygen and making the extinguishing efficiency of the extinguishing gas higher.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery with a protective device, comprising a housing (1), characterized in that: A lithium battery (2) is arranged inside the housing (1), spring plates (3) are arranged on the left and right sides of the housing (1), a shock absorbing mechanism is arranged at the bottom of the lithium battery (2), a heat dissipation mechanism is arranged inside the housing (1), and a fire prevention mechanism is arranged on the top of the lithium battery (2); The shock absorbing mechanism comprises a shock absorbing spring (401), a buffer plate (402), a power rod (403), a rotating rod (404), a fixed shaft (405), a fixed rod (406), a contact rod (407), a clamping slope (408), a U-shaped rod (409) and a power interface (410); the buffer plate (402) is slidably mounted on the inner bottom end of the housing (1); one end of the shock absorbing spring (401) is fixedly mounted on the inner bottom end of the housing (1); the other end of the shock absorbing spring (401) is fixedly mounted on the bottom of the buffer plate (402); the lithium battery (2) is fixedly mounted on the top of the buffer plate (402); The power rod (403) is fixedly mounted on the top of the lithium battery (2), the fixed rod (406) is fixedly mounted on the inner wall of the housing (1), the fixed shaft (405) is fixedly mounted on the left side of the fixed rod (406), the rotating rod (404) is rotatably mounted on the circumferential surface of the fixed shaft (405), the contact rod (407) is fixedly mounted on the right side of the rotating rod (404), the power interface (410) is fixedly mounted on the top of the lithium battery (2), the U-shaped rod (409) is fixedly mounted on the left and right sides of the power interface (410), and the clamping inclined surface (408) is slidably mounted on the top of the U-shaped rod (409).

2. A lithium battery with a protective device according to claim 1, characterized in that: A torsion spring is arranged inside the rotating rod (404), and the contact rod (407) is in contact with the clamping inclined surface (408).

3. A lithium battery with a protective device according to claim 2, characterized in that: The clamping inclined surfaces (408) are provided in two groups, and the contact rods (407) are provided in two groups on the rotating rod (404) with a height difference. An air inlet and an air outlet are provided on the housing (1).

4. A lithium battery with a protective device according to claim 3, characterized in that: The heat dissipation mechanism comprises a thermal sensor (501), an air intake fan (502), a vibration rod (503), a column (504), a rotating shaft (505), an arc-shaped protrusion (506), a compression spring (507), an elastic telescopic rod (508), a U-shaped door closing rod (509), a dustproof door (510), a filter (511) and a vibration block (512); the thermal sensor (501) is fixedly mounted on the inner wall of the housing (1); the air intake fan (502) is fixedly mounted on the inner wall of the housing (1) having an air intake port; the vibration rod (503) is fixedly mounted on the buffer plate (402); the column (504) is fixedly mounted on the bottom end section of the air intake port; the rotating shaft (505) is fixedly mounted on the bottom end section of the air intake port; The air inlet (505) is fixedly mounted on the column (504), the arc-shaped protrusion (506) is rotatably mounted on the circumferential surface of the rotating shaft (505), one end of the compression spring (507) is fixedly mounted on the side of the air inlet, the U-shaped door closing rod (509) is fixedly mounted on the other end of the compression spring (507), one end of the elastic telescopic rod (508) is fixedly mounted on the side of the air inlet, the other end of the elastic telescopic rod (508) is fixedly mounted on the U-shaped door closing rod (509), the dustproof door (510) is rotatably mounted on the side of the air inlet, the filter screen (511) is fixedly mounted inside the air inlet, and the vibration block (512) is fixedly mounted on the filter screen (511).

5. A lithium battery with a protective device according to claim 4, characterized in that: A heat dissipation port is provided at the right end of the air inlet, the thermal sensor (501) is electrically connected to the air inlet fan (502) and the heat dissipation fan, and a torsion spring is provided inside the arc-shaped protrusion (506).

6. A lithium battery with a protective device according to claim 5, characterized in that: The end of the U-shaped door closing rod (509) close to the dustproof door (510) is a short rod, and the end away from the dustproof door (510) is a long rod, the arc-shaped protrusion (506) is in horizontal contact with the long rod of the U-shaped door closing rod (509), the bottom end of the long rod of the U-shaped door closing rod (509) is arranged as an inclined surface, and the vibration blocks (512) are arranged in multiple groups, and the lengths of the vibration blocks (512) increase successively downwards.

7. A lithium battery with a protective device according to claim 6, characterized in that: The fire prevention mechanism comprises a reset spring (601), a spring block (602), a connecting rod (603), a fuse (604), a stand (605), a fire extinguisher (606), a valve (607), a starter rod (608), a push plate (609), a limit rod (610) and a U-shaped baffle (611), wherein the reset spring (601) is fixedly mounted on the top of the lithium battery (2), one end of the connecting rod (603) is slidably mounted on the top of the lithium battery (2), the other end of the connecting rod (603) is fixedly mounted on the left and right sides of the spring block (602), the stand (605) is fixedly mounted on the front end of the connecting rod (603), and the ... connecting rod (603), a fuse (604), a stand (605), a fire extinguisher (606), a valve (607), a starter rod (608), a push plate (609), a limit rod (610) and a U-shaped baffle (611). The fuse (604) is fixedly mounted on the left and right sides of the stand (605), the fire extinguisher (606) is fixedly mounted on the top of the housing (1), the valve (607) is fixedly mounted on the bottom of the fire extinguisher (606), the starter rod (608) is fixedly mounted on the control end of the valve (607), the push plate (609) is slidably mounted on the top of the side of the housing (1), the upper end of the limit rod (610) is slidably mounted on the top of the housing (1), the limit groove is opened on the top of the U-shaped baffle (611), the lower end of the limit rod (610) is slidably mounted in the limit groove, and the U-shaped baffle (611) is slidably mounted on the left side of the housing (1).

8. A lithium battery with a protective device according to claim 7, characterized in that: The fuse (604) is provided with a protective shell outside, and the push plate (609) is located on the movement track of the spring block (602).

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