A new energy automobile battery protection device

Abstract

The application discloses a new energy automobile battery protection device, which comprises a shell, a ventilation box is fixedly connected to the inner wall of the shell, buffer plates are slidably connected to the left and right sides of the shell, a battery pack is mounted on the shell, an air cooling mechanism is arranged on the inner wall of the shell, a fire extinguishing mechanism is arranged on the inner wall of the shell, and a valve actuating mechanism is arranged on the inner wall of the shell. In the process of use, the cooling air blown out by the air supply box can take away the heat of the surface of the battery pack, the outer wall of the liquid cooling plate and the gap between the battery modules, so that the battery pack is better cooled, the fire extinguishing tank can quickly release the fire extinguishing material to instantaneously extinguish the open fire on the surface of the battery pack and the surrounding, the baffle moves downward to block the ventilation tank, the air communication between the battery pack and the outside is directly cut off, and the fire condition is rapidly brought into a stable and controllable state.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicles, specifically relating to a battery protection device for new energy vehicles. Background Technology

[0002] As the core power source of a vehicle, the safety performance, reliability and adaptability to all working conditions of the power battery have become the core pain point of the industry and the top priority of consumers. However, traditional battery pack protection solutions have problems such as single function, poor coordination and easy failure under extreme working conditions.

[0003] CN112563619B discloses a battery protection device for new energy vehicles, including a main housing with a battery protection chamber inside. The upper side of the battery protection chamber is connected to an upward-opening ventilation chamber, and the lower side is connected to a sliding rod chamber. A fan seat is rotatably connected to the inner wall of the ventilation chamber. When the vehicle is in motion, the vehicle's power drives the fan to rotate, thus cooling the battery. When the vehicle is stopped and charging, if the battery heats up, the cooling motor automatically starts, driving the fan to rotate, thereby cooling the battery and reducing the charging current to prevent the battery from overheating and exploding. Furthermore, based on battery temperature feedback, the higher the temperature, the faster the fan speed and the lower the charging current, ensuring the charging safety of the new energy vehicle. Additionally, multiple buffer springs inside the battery protection chamber prevent severe battery deformation that could lead to combustion and explosion when the vehicle is suddenly impacted.

[0004] During use, when liquid cooling is used to lower the temperature, the ambient temperature around the battery pack is still too high. When the two sides of the battery pack collide and catch fire, the electrolyte in the battery pack flows freely, and air enters through the vents, making the battery pack burn more violently. Summary of the Invention

[0005] The purpose of this invention is to provide a battery protection device for new energy vehicles to solve the problem of excessively high ambient temperature around the battery pack.

[0006] To achieve the above objectives, the present invention provides a new energy vehicle battery protection device, including a housing, a ventilation box fixedly connected to the inner wall of the housing, buffer plates slidably connected to the left and right sides of the housing, a battery pack installed in the housing, a wind-cooling mechanism, a fire extinguishing mechanism, and a valve actuation mechanism on the inner wall of the housing. When the ventilation box rotates, the air generated by the ventilation box is transmitted to the air supply box and blown out. The air blown out by the air supply box can cool the surface of the battery pack. The rapid start-up of the ventilation box directly adds a new heat dissipation channel to the battery pack. The cooling air blown out by the air supply box carries away heat from the surface of the battery pack, the outer wall of the liquid cooling plate, and the gaps between the battery modules, instantly increasing the total heat dissipation power of the entire battery system, better cooling the battery pack, and preventing the battery pack's lifespan from decreasing due to excessively high external temperatures.

[0007] The air-cooling mechanism includes a reciprocating lead screw, a fixed rod, an air-generating box, an air-supplying box, a rack, a liquid-cooling plate, a threaded rod, and a gear. A motor is installed on the inner wall of the housing. The reciprocating lead screw is rotatably connected to the inner wall of the housing and fixedly connected to the output end of the motor. The fixed rod is fixedly connected to the inner wall of the housing. The air-generating box is movably connected to the circumferential surface of the reciprocating lead screw. The air-supplying box is fixedly connected to the front of the air-generating box. The rack is fixedly connected to the top of the air-generating box. The liquid-cooling plate is fixedly connected to the top of the battery pack. The threaded rod is rotatably connected to the inner wall of the battery pack. The gear is fixedly connected to the circumferential surface of the threaded rod.

[0008] In one or more embodiments of the present invention, the air-cooling mechanism further includes a brush plate, a collection box, a protrusion, a movable valve plate, an elastic telescopic rod, and a second fixed rod. The brush plate is threadedly connected to the threaded rod on the circumferential surface. The collection box is fixedly connected to the bottom of the brush plate. The protrusion is fixedly connected to the right side of the battery pack. The movable valve plate is slidably connected to the inner wall of the collection box. The elastic telescopic rod is fixedly connected to the bottom of the brush plate. The second fixed rod is fixedly connected to the inner wall of the battery pack, allowing the movable valve plate to move upward, thereby allowing the condensate in the collection box to be poured out and flow out through small holes in the inner wall of the housing. This quickly peels off the condensate on the surface of the liquid cooling plate and pours it out from the outside of the battery pack through the collection box. This allows the water vapor to completely leave the high-voltage area of ​​the battery pack, preventing the condensate from contacting the high-voltage components of the battery pack, eliminating fatal safety hazards such as electrical short circuits and leakage, preventing the continuous corrosion of metal components and seals by the condensate, and extending the structural service life of the battery pack.

[0009] In one or more embodiments of the present invention, the air box is slidably connected to the circumferential surface of the first fixed rod, the threaded rod is rotatably connected to the inner wall of the housing, the second fixed rod is fixedly connected to the inner wall of the housing, the first gear is located on the movement trajectory of the first rack, the movable valve plate is fixedly connected to the telescopic end of the elastic telescopic rod, the brush plate is slidably connected to the circumferential surface of the second fixed rod, the protrusion is located on the movement trajectory of the movable valve plate, the brush plate is in contact with the liquid cooling plate, and the inner wall of the housing is provided with tiny water flow holes.

[0010] In one or more embodiments of the present invention, the fire extinguishing mechanism includes a connecting rod, a pin, and a fire extinguishing box. The connecting rod is slidably connected to the inner wall of the housing, the pin is fixedly connected to the inner wall of the connecting rod, and the fire extinguishing box is fixedly connected to the inner wall of the housing. The fire extinguishing box is equipped with a contact switch. When the connecting rod moves, it drives the pin to move. When the pin moves, it contacts the control switch on the fire extinguishing box, causing the fire extinguishing box to release fire extinguishing material onto the spray plate, thereby extinguishing the fire on the battery pack. The fire extinguishing box can quickly release fire extinguishing material to instantly extinguish open flames on the surface and around the battery pack, while suppressing the diffusion of toxic gases. It can also immediately contain leaked electrolyte to prevent it from flowing and spreading to form a flowing fire, and provide an escape route for occupants.

[0011] In one or more embodiments of the present invention, the fire extinguishing mechanism further includes a tooth, a gear, and a spray plate. The tooth is fixedly connected to the bottom of the connecting rod, the gear is rotatably connected to the bottom of the fire extinguishing box, and the spray plate is fixedly connected to the rotating rod of the gear.

[0012] In one or more embodiments of the present invention, the connecting rod is fixedly connected to the left side of the buffer plate, the second gear is located on the movement trajectory of the first gear, and the fire extinguishing box is connected to the spray plate, so that during the movement of the first gear, the first gear drives the second gear to rotate, and the rotation of the second gear drives the spray plate to rotate, so that the spray plate can deflect at a certain angle and release fire extinguishing material to the battery pack on the other side. This allows all the limited fire extinguishing material to be accurately delivered to the fire side, avoids the waste of fire extinguishing material resources, and improves the fire extinguishing efficiency of the fire extinguishing material on the battery pack.

[0013] In one or more embodiments of the present invention, the valve actuator includes an L-shaped plate, a limiting plate, a movable plate, a fixed box, a connecting plate, a fixed rod, a slider, a locking block, and a partition. The L-shaped plate is fixedly connected to the bottom of the connecting rod, the fixed box is fixedly connected to the inner wall of the housing, the limiting plate is fixedly connected to the front of the fixed box, the movable plate is slidably connected to the inner wall of the limiting plate, the connecting plate is rotatably connected to the top of the movable plate, the fixed rod is fixedly connected to the front of the fixed box, the slider is fixedly connected to the circumferential surface of the fixed rod, the locking block is fixedly connected to the rear of the slider, the partition is slidably connected to the inner wall of the fixed box, and the inner wall of the ventilation box has a hole for the partition to move.

[0014] In one or more embodiments of the present invention, the valve actuator further includes an L-shaped plate II, a toothed gear II, a gear III, a rotating shaft, a gear IV, a rack II, and a push block. The L-shaped plate II is fixedly connected to the inner wall of the housing. The toothed gear II is slidably connected to the top of the L-shaped plate II. The rotating shaft is rotatably connected to the inner wall of the fixed box. The gear III is fixedly connected to the circumferential surface of the rotating shaft. The gear IV is fixedly connected to the circumferential surface of the rotating shaft. The rack II is slidably connected to the front of the fixed box. The push block is slidably connected to the circumferential surface of the fixed rod III, causing the slider to move on the circumferential surface of the fixed rod III. The movement of the slider causes the locking block to move, thereby disengaging the locking block from the partition, causing the partition to move downward. The downward movement of the partition then seals the ventilation box. Sealing the ventilation box can directly cut off the air connection between the battery pack and the outside, allowing the fire to quickly enter a state of oxygen deficiency, preventing the open flame from continuing due to lack of oxygen. This fundamentally blocks the chain spread of thermal runaway, allowing the fire to quickly enter a stable and controllable state. Sealing the air inlet can cut off the diffusion channel of toxic gases and also prevent pollutants from spreading to the surrounding environment.

[0015] In one or more embodiments of the present invention, the movable plate contacts the L-shaped plate, the connecting plate is rotatably connected to the slider, the locking block is inserted into the inner wall of the partition, the gear three is located on the movement trajectory of the tooth two, the gear four meshes with the rack two, and the push block is located on the movement trajectory of the rack two, causing the rack two to move towards one end of the push block. The rack two moves to contact the push block and drives the push block to move. The push block moves and pushes the slider to move. The slider moves and drives the locking block to move. Thus, the partition can be used to seal the ventilation box in another way, thereby preventing the partition from failing to close the ventilation box when the shell is severely impacted, and greatly improving the partition's resistance to failure under extreme working conditions.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This device features a new energy vehicle battery protection system. Through the coordinated operation of a reciprocating screw, a fixed rod, an air supply box, a rack, a liquid cooling plate, a threaded rod, a gear, a brush plate, and a collection box, the air blown from the air supply box cools the surface of the battery pack. The rapid activation of the air supply box directly adds a new heat dissipation channel to the battery pack. The cooling air blown from the air supply box removes heat from the surface of the battery pack, the outer wall of the liquid cooling plate, and the gaps between the battery modules, instantly increasing the total heat dissipation power of the entire battery system. This better cools the battery pack and prevents its lifespan from decreasing due to excessively high external temperatures. Simultaneously, it quickly removes condensate from the surface of the liquid cooling plate and pours it out from the outside of the battery pack through the collection box, ensuring that water vapor completely leaves the high-voltage area of ​​the battery pack. This prevents condensate from contacting the high-voltage components of the battery pack, eliminating fatal safety hazards such as electrical short circuits and leakage, and preventing continuous corrosion of metal components and seals by condensate, thus extending the structural lifespan of the battery pack.

[0018] 2. This device features a new energy vehicle battery protection system. Through the coordinated operation of the connecting rod, ejector pin, fire extinguishing box, gear one, gear two, and spray plate, the fire extinguishing box can quickly release extinguishing material to instantly extinguish open flames on and around the battery pack, while simultaneously suppressing the spread of toxic gases. It can also immediately contain leaked electrolyte to prevent it from flowing and spreading into a flowing fire, providing an escape route for passengers. At the same time, the spray plate can deflect at a certain angle to release extinguishing material to the battery pack on the other side, ensuring that all limited extinguishing material is accurately delivered to the side of the fire, avoiding waste of extinguishing material resources, and improving the extinguishing efficiency of the extinguishing material on the battery pack.

[0019] 3. This device features a new energy vehicle battery protection system. Through the coordinated operation of L-shaped plate one, limiting plate, moving plate, fixed box, connecting plate, fixed rod three, slider, locking block, partition, and L-shaped plate two, the partition moves downward to seal the ventilation box. Sealing the ventilation box directly cuts off the air connection between the battery pack and the outside, allowing the fire to quickly enter an oxygen-deficient state, preventing the open flame from continuing due to lack of oxygen. This fundamentally blocks the chain spread of thermal runaway, allowing the fire to quickly enter a stable and controllable state. Sealing the air inlet cuts off the diffusion channel of toxic gases and prevents pollutants from spreading to the surrounding environment. At the same time, the partition can also seal the ventilation box in another way, preventing the partition from failing to close the ventilation box when the casing is severely impacted, thus greatly improving the partition's resistance to failure under extreme conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present invention;

[0021] Figure 2 This is a half-sectional view of the overall structure in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of an air-cooling mechanism in one embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of a threaded rod structure in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the collection box structure in one embodiment of the present invention;

[0025] Figure 6 As shown in one embodiment of the present invention Figure 5 Enlarged view of the structure at point A in the middle;

[0026] Figure 7 This is a schematic diagram of a fire extinguishing mechanism in one embodiment of the present invention;

[0027] Figure 8 As shown in one embodiment of the present invention Figure 7 Enlarged view of the structure at point B;

[0028] Figure 9 This is a schematic diagram of a valve actuator in one embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of a partition structure in one embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of the pusher block structure in one embodiment of the present invention;

[0031] Figure 12 As shown in one embodiment of the present invention Figure 11 Enlarged view of the structure at point C.

[0032] Explanation of key figure labels:

[0033] 1. Housing; 2. Ventilation box; 3. Buffer plate; 4. Battery pack; 5. Air-cooling mechanism; 6. Fire extinguishing mechanism; 7. Valve actuator; 501. Reciprocating screw; 502. Fixed rod one; 503. Air supply box; 504. Air supply box; 505. Rack one; 506. Liquid cooling plate; 507. Threaded rod; 508. Gear one; 509. Brush plate; 510. Collection box; 511. Protrusion; 512. Moving valve plate; 513. Elastic telescopic rod; 514. Fixed rod two; 601. Connection 602. Rod; 603. Pin; 604. Fire extinguisher box; 605. Gear 1; 606. Gear 2; 607. Spray plate; 708. L-shaped plate 1; 709. Limiting plate; 7000. Moving plate; 701. Fixed box; 702. Connecting plate; 703. Fixed rod 3; 704. Sliding block; 705. Locking block; 706. Partition plate; 717. L-shaped plate 2; 718. Gear 2; 719. Gear 3; 710. Rotating shaft; 711. Gear 4; 712. Rack 2; 713. Push block. Detailed Implementation

[0034] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0035] like Figures 1-12 As shown, one embodiment of the present invention is: a new energy vehicle battery protection device, including a housing 1, a ventilation box 2 fixedly connected to the inner wall of the housing 1, buffer plates 3 slidably connected to the left and right sides of the housing 1, a battery pack 4 installed on the housing 1, a wind-cooling mechanism 5 and a fire extinguishing mechanism 6 provided on the inner wall of the housing 1, and a valve actuator 7 provided on the inner wall of the housing 1, so that the air blown out by the ventilation box 504 can cool the surface of the battery pack 4. The rapid start of the ventilation box 503 can directly add a new heat dissipation channel for the battery pack 4. The cooling air blown out by the ventilation box 504 carries away the heat from the surface of the battery pack 4, the outer wall of the liquid cooling plate 506, and the gaps between the battery modules, instantly increasing the total heat dissipation power of the entire battery system, better cooling the battery pack 4, and preventing the battery pack 4 from experiencing a decrease in lifespan due to excessively high external temperatures.

[0036] The air-cooling mechanism 5 includes a reciprocating screw 501, a fixed rod 502, an air-generating box 503, an air-supplying box 504, a rack 505, a liquid cooling plate 506, a threaded rod 507, and a gear 508. A motor is installed on the inner wall of the housing 1. The reciprocating screw 501 is rotatably connected to the inner wall of the housing 1 and fixedly connected to the output end of the motor. The fixed rod 502 is fixedly connected to the inner wall of the housing 1. The air-generating box 503 is movably connected to the circumferential surface of the reciprocating screw 501. The air-supplying box 504 is fixedly connected to the front of the air-generating box 503. The rack 505 is fixedly connected to the top of the air-generating box 503. The liquid cooling plate 506 is fixedly connected to the top of the battery pack 4. The threaded rod 507 is rotatably connected to the inner wall of the battery pack 4. The gear 508 is fixedly connected to the circumferential surface of the threaded rod 507.

[0037] The air-cooling mechanism 5 also includes a brush plate 509, a collection box 510, a protrusion 511, a movable valve plate 512, an elastic telescopic rod 513, and a fixed rod 514. The brush plate 509 is threadedly connected to the threaded rod 507 on the circumferential surface. The collection box 510 is fixedly connected to the bottom of the brush plate 509. The protrusion 511 is fixedly connected to the right side of the battery pack 4. The movable valve plate 512 is slidably connected to the inner wall of the collection box 510. The elastic telescopic rod 513 is fixedly connected to the bottom of the brush plate 509. The fixed rod 514 is fixedly connected to the inner wall of the battery pack 4. At the same time, the condensate on the surface of the liquid cooling plate 506 is quickly stripped off and poured out from the outside of the battery pack 4 through the collection box 510. This allows the water vapor to completely leave the high-voltage area of ​​the battery pack 4, preventing the condensate from contacting the high-voltage components of the battery pack 4, eliminating fatal safety hazards such as electrical short circuits and leakage, preventing the continuous corrosion of metal parts and seals by the condensate, and extending the structural service life of the battery pack 4.

[0038] The air box 503 is slidably connected to the circumferential surface of the fixed rod 502, the threaded rod 507 is rotatably connected to the inner wall of the housing 1, the fixed rod 514 is fixedly connected to the inner wall of the housing 1, the gear 508 is located on the movement trajectory of the rack 505, the movable valve plate 512 is fixedly connected to the telescopic end of the elastic telescopic rod 513, the brush plate 509 is slidably connected to the circumferential surface of the fixed rod 514, the protrusion 511 is located on the movement trajectory of the movable valve plate 512, the brush plate 509 is in contact with the liquid cooling plate 506, and the inner wall of the housing 1 is provided with small water flow holes.

[0039] The fire extinguishing mechanism 6 includes a connecting rod 601, a pin 602, and a fire extinguishing box 603. The connecting rod 601 is slidably connected to the inner wall of the housing 1, the pin 602 is fixedly connected to the inner wall of the connecting rod 601, and the fire extinguishing box 603 is fixedly connected to the inner wall of the housing 1. The fire extinguishing box 603 is equipped with a contact switch.

[0040] The fire extinguishing mechanism 6 also includes a tooth 604, a gear 605, and a spray plate 606. The tooth 604 is fixedly connected to the bottom of the connecting rod 601. The gear 605 is rotatably connected to the bottom of the fire extinguishing box 603. The spray plate 606 is fixedly connected to the rotating rod of the gear 605, so that the fire extinguishing box 603 can quickly release fire extinguishing material to instantly extinguish open flames on the surface and around the battery pack 4, while suppressing the diffusion of toxic gases. It can also immediately contain leaked electrolyte to prevent it from flowing and spreading to form a flowing fire, and provide an escape route for passengers.

[0041] The connecting rod 601 is fixedly connected to the left side of the buffer plate 3. The gear 605 is located on the movement trajectory of the tooth 604. The fire extinguishing box 603 is connected to the spray plate 606. At the same time, the spray plate 606 can deflect at a certain angle and release fire extinguishing material to the battery pack 4 on the other side. This can ensure that all the limited fire extinguishing material is accurately delivered to the fire side, avoid waste of fire extinguishing material resources, and improve the fire extinguishing efficiency of the fire extinguishing material on the battery pack 4.

[0042] Working principle: When the device is started, if the ambient temperature of the inner wall of the housing 1 is still too high after the liquid cooling plate 506 is activated, the motor is started. The motor output drives the reciprocating screw 501 to rotate. The rotation of the reciprocating screw 501 drives the air supply box 503 to rotate. Due to the fixing and limiting effect of the fixed rod 502, the air supply box 503 reciprocates on the circumferential surface of the reciprocating screw 501. The movement of the air supply box 503 drives the air delivery box 504 to move. At this time, the fan in the air supply box 503 rotates. The air generated by 503 is delivered to the air supply box 504 and blown out. The air blown out by the air supply box 504 can cool the surface of the battery pack 4. The rapid start of the air supply box 503 can directly add a new heat dissipation channel for the battery pack 4. The cooling air blown out by the air supply box 504 carries away the heat from the surface of the battery pack 4, the outer wall of the liquid cooling plate 506, and the gaps between the battery modules, instantly increasing the total heat dissipation power of the entire battery system, better cooling the battery pack 4, and preventing the battery pack 4 from having a reduced lifespan due to excessively high external temperatures.

[0043] During the movement of the air supply box 503, the movement of the air supply box 503 drives the rack 505 to move. Since the gear 508 is located on the movement trajectory of the rack 505 and can mesh with it, the rack 505 drives the gear 508 to rotate during the movement of the rack 505. The rotation of the gear 508 drives the threaded rod 507 to rotate, and the rotation of the threaded rod 507 drives the brush plate 509 to rotate. Due to the limiting and fixing effect of the fixing rod 514, the brush plate 509 moves on the circumferential surface of the threaded rod 507. The movement of the brush plate 509 drives the collection box 510 to move, thereby scraping the condensate generated at the bottom of the liquid cooling plate 506 into the collection box 510. During the movement of the collection box 510, the movement of the collection box 510 drives the movement valve plate 512 to move. When the movement valve plate 512 contacts the protrusion 511, the convex surface of the protrusion 511 causes the movement valve plate 512 to move upward, thereby allowing the condensate in the collection box 510 to be poured out and flow out through the small hole in the inner wall of the housing 1. This quickly peels off the condensate on the surface of the liquid cooling plate 506 and pours it out from the outside of the battery pack 4 through the collection box 510. This allows the water vapor to completely leave the high-voltage area of ​​the battery pack 4, preventing the condensate from contacting the high-voltage components of the battery pack 4, eliminating fatal safety hazards such as electrical short circuits and leakage, preventing the continuous corrosion of metal parts and seals by the condensate, and extending the structural service life of the battery pack 4.

[0044] When the left and right sides of the car are impacted and come into contact with the housing 1, the battery pack 4 on the inner wall of the housing 1 may be damaged and catch fire due to the impact. At this time, the buffer plate 3 will move closer to the housing 1 due to the impact. The movement of the buffer plate 3 will drive the connecting rod 601 to move. The movement of the connecting rod 601 will drive the ejector pin 602 to move. The ejector pin 602 will contact the control switch on the fire extinguishing box 603, so that the fire extinguishing box 603 will release fire extinguishing material to the spray plate 606, thereby extinguishing the fire on the battery pack 4. The fire extinguishing box 603 can quickly release fire extinguishing material to instantly extinguish the open flames on the surface and around the battery pack 4, while inhibiting the spread of toxic gases. It can also wrap the leaked electrolyte in time to prevent it from flowing and spreading to form a flowing fire, and provide an escape route for the driver and passengers.

[0045] As the connecting rod 601 moves and contacts the fire extinguishing box 603, the movement of the connecting rod 601 drives the first gear 604 to move. Since the second gear 605 is located on the movement trajectory of the first gear 604 and can mesh with it, the first gear 604 drives the second gear 605 to rotate during the movement of the first gear 604. The rotation of the second gear 605 drives the spray plate 606 to rotate, so that the spray plate 606 can deflect at a certain angle and release fire extinguishing material to the battery pack 4 on the other side. This allows all the limited fire extinguishing material to be accurately delivered to the fire side, avoids waste of fire extinguishing material resources, and improves the fire extinguishing efficiency of the fire extinguishing material on the battery pack 4.

[0046] like Figures 1-12 As shown, in another embodiment of the present invention based on the above embodiments: the valve actuator 7 includes an L-shaped plate 701, a limiting plate 702, a moving plate 703, a fixed box 704, a connecting plate 705, a fixed rod 706, a slider 707, a locking block 708, and a partition 709. The L-shaped plate 701 is fixedly connected to the bottom of the connecting rod 601. The fixed box 704 is fixedly connected to the inner wall of the housing 1. The limiting plate 702 is fixedly connected to the front of the fixed box 704. The moving plate 703 is slidably connected to the inner wall of the limiting plate 702. The connecting plate 705 is rotatably connected to the top of the moving plate 703. The fixed rod 706 is fixedly connected to the front of the fixed box 704. The slider 707 is fixedly connected to the circumferential surface of the fixed rod 706. The locking block 708 is fixedly connected to the rear of the slider 707. The partition 709 is slidably connected to the inner wall of the fixed box 704. The inner wall of the ventilation box 2 has a hole for the partition 709 to move.

[0047] The valve actuator 7 also includes an L-shaped plate 710, a gear 711, a gear 712, a rotating shaft 713, a gear 714, a rack 715, and a push block 716. The L-shaped plate 710 is fixedly connected to the inner wall of the housing 1. The gear 711 is slidably connected to the top of the L-shaped plate 710. The rotating shaft 713 is rotatably connected to the inner wall of the fixed box 704. The gear 712 is fixedly connected to the circumferential surface of the rotating shaft 713. The gear 714 is fixedly connected to the circumferential surface of the rotating shaft 713. The rack 715... 15 is slidably connected to the front of the fixed box 704, and the push block 716 is slidably connected to the circumferential surface of the fixed rod 706, so that the partition 709 moves down and seals the ventilation box 2. Sealing the ventilation box 2 can directly cut off the air connection between the battery pack 4 and the outside, so that the fire scene can quickly enter a state of oxygen deficiency and the open flame cannot continue due to lack of oxygen. This fundamentally blocks the chain spread of thermal runaway and allows the fire to quickly enter a stable and controllable state. Sealing the air inlet can cut off the diffusion channel of toxic gases and also prevent pollutants from spreading to the surrounding environment.

[0048] The movable plate 703 contacts the L-shaped plate 701, the connecting plate 705 is rotatably connected to the slider 707, the locking block 708 is inserted into the inner wall of the partition 709, the gear 3 712 is located on the movement trajectory of the tooth 2 711, the gear 4 714 meshes with the rack 2 715, and the push block 716 is located on the movement trajectory of the rack 2 715. At the same time, the partition 709 can be used to seal the ventilation box 2 in another way, thereby preventing the partition 709 from failing to close the ventilation box 2 when the shell 1 is subjected to a severe collision, which greatly improves the failure resistance of the partition 709 under extreme working conditions.

[0049] Working principle: When the battery pack 4 in the housing 1 catches fire, it is necessary to isolate the housing 1 from oxygen. During the movement of the connecting rod 601, the movement of the connecting rod 601 drives the L-shaped plate 701 to move. The L-shaped plate 701 moves and presses against the moving plate 703. Due to the inclined surface of the moving plate 703, the moving plate 703 moves upward. The upward movement of the moving plate 703 drives the connecting plate 705 to move upward. The upward movement of the connecting plate 705 drives the slider 707 to move upward. Due to the limiting and fixing effect of the fixing rod 706, the slider 707 moves at the fixing rod. On the circumferential surface of the three 706, the slider 707 moves, causing the locking block 708 to move, and then the locking block 708 disengages from the partition 709, causing the partition 709 to move down. The partition 709 moves down and then seals the ventilation box 2. Sealing the ventilation box 2 can directly cut off the air connection between the battery pack 4 and the outside, allowing the fire to quickly enter a state of oxygen deficiency, so that the open flame cannot continue due to lack of oxygen. This fundamentally blocks the chain spread of thermal runaway, allowing the fire to quickly enter a stable and controllable state. Sealing the air inlet can cut off the diffusion channel of toxic gases and also prevent pollutants from spreading to the surrounding environment.

[0050] When a severe collision occurs on both sides of the car, the housing 1 undergoes severe deformation, preventing the L-shaped plate 701 from moving. At this time, the deformation of the housing 1 causes the L-shaped plate 710 to move towards the end closer to the ventilation box 2. The movement of the L-shaped plate 710 causes the gear 711 to move. Since the gear 712 is located on the trajectory of the gear 711 and can mesh with it, during the movement of the gear 711, the gear 711 drives the gear 712 to rotate. The rotation of the gear 712 drives the rotating shaft 713 to rotate, and the rotation of the rotating shaft 713 drives the gear... As gear 714 rotates, it meshes with rack 715, causing rack 715 to move toward push block 716. Rack 715 then contacts push block 716 and moves push block 716. Push block 716 moves and pushes slider 707, which in turn moves locking block 708. This allows partition 709 to seal ventilation box 2 in another way, preventing partition 709 from failing to close ventilation box 2 when housing 1 is subjected to severe impact. This significantly improves the failure resistance of partition 709 under extreme conditions.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery protection device for new energy vehicles, comprising a housing (1), characterized in that: A ventilation box (2) is fixedly connected to the inner wall of the housing (1), a buffer plate (3) is slidably connected to the left and right sides of the housing (1), a battery pack (4) is installed in the housing (1), a wind-cooling mechanism (5) is provided on the inner wall of the housing (1), a fire extinguishing mechanism (6) is provided on the inner wall of the housing (1), and a valve actuator (7) is provided on the inner wall of the housing (1). The air-cooling mechanism (5) includes a reciprocating lead screw (501), a fixed rod (502), an air supply box (503), an air delivery box (504), a rack (505), a liquid cooling plate (506), a threaded rod (507), and a gear (508). A motor is installed on the inner wall of the housing (1). The reciprocating lead screw (501) is rotatably connected to the inner wall of the housing (1). The reciprocating lead screw (501) is fixedly connected to the output end of the motor. The fixed rod (502) is fixedly connected to the housing. (1) The inner wall of the air supply box (503) is movably connected to the circumferential surface of the reciprocating screw (501), the air supply box (504) is fixedly connected to the front of the air supply box (503), the rack (505) is fixedly connected to the top of the air supply box (503), the liquid cooling plate (506) is fixedly connected to the top of the battery pack (4), the threaded rod (507) is rotatably connected to the inner wall of the battery pack (4), and the gear (508) is fixedly connected to the circumferential surface of the threaded rod (507).

2. The new energy vehicle battery protection device according to claim 1, characterized in that: The air-cooling mechanism (5) also includes a brush plate (509), a collection box (510), a protrusion (511), a movable valve plate (512), an elastic telescopic rod (513), and a second fixed rod (514). The brush plate (509) is threadedly connected to the threaded rod (507) on the circumferential surface. The collection box (510) is fixedly connected to the bottom of the brush plate (509). The protrusion (511) is fixedly connected to the right side of the battery pack (4). The movable valve plate (512) is slidably connected to the inner wall of the collection box (510). The elastic telescopic rod (513) is fixedly connected to the bottom of the brush plate (509). The second fixed rod (514) is fixedly connected to the inner wall of the battery pack (4).

3. The new energy vehicle battery protection device according to claim 2, characterized in that: The air box (503) is slidably connected to the circumferential surface of the first fixed rod (502), the threaded rod (507) is rotatably connected to the inner wall of the housing (1), the second fixed rod (514) is fixedly connected to the inner wall of the housing (1), the first gear (508) is located on the movement trajectory of the first rack (505), the movable valve plate (512) is fixedly connected to the telescopic end of the elastic telescopic rod (513), the brush plate (509) is slidably connected to the circumferential surface of the second fixed rod (514), the protrusion (511) is located on the movement trajectory of the movable valve plate (512), the brush plate (509) is in contact with the liquid cooling plate (506), and the inner wall of the housing (1) is provided with small water flow holes.

4. A new energy vehicle battery protection device according to claim 3, characterized in that: The fire extinguishing mechanism (6) includes a connecting rod (601), a pin (602), and a fire extinguishing box (603). The connecting rod (601) is slidably connected to the inner wall of the housing (1). The pin (602) is fixedly connected to the inner wall of the connecting rod (601). The fire extinguishing box (603) is fixedly connected to the inner wall of the housing (1). The fire extinguishing box (603) is equipped with a contact switch.

5. A new energy vehicle battery protection device according to claim 4, characterized in that: The fire extinguishing mechanism (6) also includes a toothed gear (604), a gear (605), and a spray plate (606). The toothed gear (604) is fixedly connected to the bottom of the connecting rod (601), the gear (605) is rotatably connected to the bottom of the fire extinguishing box (603), and the spray plate (606) is fixedly connected to the rotating rod of the gear (605).

6. A new energy vehicle battery protection device according to claim 5, characterized in that: The connecting rod (601) is fixedly connected to the left side of the buffer plate (3), the gear two (605) is located on the movement trajectory of the tooth one (604), and the fire extinguishing box (603) is connected to the spray plate (606).

7. A new energy vehicle battery protection device according to claim 6, characterized in that: The valve actuator (7) includes an L-shaped plate (701), a limiting plate (702), a moving plate (703), a fixed box (704), a connecting plate (705), a fixed rod (706), a slider (707), a locking block (708), and a partition (709). The L-shaped plate (701) is fixedly connected to the bottom of the connecting rod (601). The fixed box (704) is fixedly connected to the inner wall of the housing (1). The limiting plate (702) is fixedly connected to the front of the fixed box (704). The moving plate... (703) is slidably connected to the inner wall of the limiting plate (702), the connecting plate (705) is rotatably connected to the top of the moving plate (703), the fixing rod three (706) is fixedly connected to the front of the fixed box (704), the slider (707) is fixedly connected to the circumferential surface of the fixing rod three (706), the locking block (708) is fixedly connected to the rear of the slider (707), the partition (709) is slidably connected to the inner wall of the fixed box (704), and the ventilation box (2) has a hole in the inner wall for the partition (709) to move.

8. A new energy vehicle battery protection device according to claim 7, characterized in that: The valve actuator (7) further includes an L-shaped plate (710), a toothed gear (711), a gear (712), a rotating shaft (713), a gear (714), a rack (715), and a pusher (716). The L-shaped plate (710) is fixedly connected to the inner wall of the housing (1). The toothed gear (711) is slidably connected to the top of the L-shaped plate (710). The rotating shaft (713) is rotatably connected to the inner wall of the fixed box (704). The gear (712) is fixedly connected to the circumferential surface of the rotating shaft (713). The gear (714) is fixedly connected to the circumferential surface of the rotating shaft (713). The rack (715) is slidably connected to the front of the fixed box (704). The pusher (716) is slidably connected to the circumferential surface of the fixed rod (706).

9. A new energy vehicle battery protection device according to claim 8, characterized in that: The movable plate (703) contacts the L-shaped plate (701), the connecting plate (705) is rotatably connected to the slider (707), the locking block (708) is inserted into the inner wall of the partition (709), the gear three (712) is located on the movement trajectory of the tooth two (711), the gear four (714) meshes with the rack two (715), and the push block (716) is located on the movement trajectory of the rack two (715).

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