New energy automobile battery block with active misfire suppression function

Abstract

The invention discloses a new energy automobile battery block with an active misfire suppression function, and relates to the technical field of new energy automobile battery blocks, the new energy automobile battery block comprises a battery box, a first sealing plate, a battery pack, a vertical damping device and a cooling device, the battery pack can release a potassium-based fire extinguishing agent with an open fire suppression capability before explosion and fire break out, a uniformly distributed fire suppression environment is formed around the battery, detonation caused by thermal runaway of the battery is effectively prevented, safety threats to a heavy truck body, a driver and passengers are reduced, and the vertical vibration reduction device can absorb and disperse vibration energy from the road surface, so that the safety of the heavy truck is improved. The internal resistance rise, the uneven current distribution and the serious local heating caused by continuous vibration of active substances in the battery cell are avoided, the possibility of thermal runaway is reduced, the cooling device can accelerate the flowing of the cooling liquid according to the vibration amplitude when the battery block vibrates, the cooperative control effect of vibration and cooling is formed, and the service life of the battery block is prolonged. And the battery module is ensured to always run in a safe temperature range.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle battery blocks, and in particular to a new energy vehicle battery block with active fire suppression. Background Art

[0002] Traditional gasoline-powered vehicles are gradually transforming towards electrification. New energy vehicles are subject to high load, long driving range, high frequency of use and other working conditions during transportation. As one of the core components of new energy vehicles, new energy vehicle battery blocks have higher requirements on battery performance, structure and thermal management. Existing battery blocks will cause the active materials inside the battery cells to shift, loosen or peel off when vibrating. Such physical changes will seriously affect the structural stability inside the battery cells, resulting in increased internal resistance, uneven current distribution and severe local heating. Existing battery blocks mostly use passive protection solutions in the event of thermal runaway, which have problems such as delayed response, low fire extinguishing efficiency and high risk of re-ignition. Summary of the Invention

[0003] The object of the present invention is to provide a new energy vehicle battery block with active fire suppression to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution: the new energy vehicle battery block includes a battery box, a first sealing plate is installed on one side of the battery box, a vertical vibration damping device is installed inside the battery box, a battery pack is installed on one side of the vertical vibration damping device, a cooling device is installed on one side of the battery pack, and the battery pack and the cooling device are installed inside the battery box.

[0005] The battery pack includes a shell, which is mounted on a vertical vibration damping device, a second sealing plate is mounted on one side of the shell, a battery cell is mounted inside the shell, a first pressure relief valve is mounted on the battery cell, a fire suppression device is mounted above the battery cell, an energy consumption device is mounted on one side of the battery cell, and a second pressure relief valve is mounted on one side of the shell.

[0006] The fire suppression device includes a temperature control switch, which is installed above the battery cell. The temperature control switch is located on one side of the first pressure relief valve. A first wire and a second wire are installed on one side of the temperature control switch. A starting power supply is installed on one side of the first wire. An ignition bridge wire is installed on one side of the second wire. A third wire is installed between the starting power supply and the ignition bridge wire. A fire extinguishing device is installed below the ignition bridge wire. The starting power supply and the fire extinguishing device are installed on the inner wall of the shell. When the lithium battery cell continues to heat abnormally and reaches the critical temperature of irreversible thermal runaway, the temperature control switch starts to work, and the temperature control switch changes from a normally open state to a normally closed state. The circuit is connected, the ignition bridge wire is heated and activated, and the potassium-based fire extinguishing agent in the fire extinguishing device is ignited. The potassium-based fire extinguishing agent decomposes due to heat and releases potassium oxide mist into the shell through the nozzle. Micron-sized potassium oxide mist particles fill the entire shell, forming a suppressive environment. When the thermal runaway explosion generates flames, it encounters the potassium oxide mist particles, and the free radicals in the flame and the free radicals in the potassium oxide mist particles undergo a chain chemical reaction. , quickly interrupting the chain reaction of flames, the open flame failed to form an effective continuous combustion process and the process ended. At the same time, the surface energy of potassium oxide aerosol particles is extremely high and can absorb a large amount of heat. At the end of the first wave of explosion, due to the lack of high temperature generated by the continuous combustion of the open flame, the temperature inside the shell dropped rapidly, and the heat spread capacity was insufficient to heat other normal battery cells to cause thermal runaway. When the open flame disappeared, most of the potassium oxide aerosol was discharged from the second pressure relief valve along with the gas generated by the battery cell, and a small amount of potassium oxide aerosol remained in the shell, providing a continuous suppression effect, which can cope with the next wave of thermal runaway explosion and fire.

[0007] The energy dissipation device includes a first reed, which is mounted on one side of a battery cell. A second reed is mounted on one side of the first reed, which is mounted on one side of the battery cell. The first and second reeds are mounted between two battery cells, the first and second reeds are staggered, and a heat insulating plate is mounted between the first and second reeds. A first friction block is mounted on one end of the first reed, which slides on one side of the battery cell. A second friction block is mounted on one end of the second reed, which slides on one side of the battery cell. A heat conductive block is mounted on one end of the battery cell, and a cooling plate is mounted on one end of the heat conductive block. The cooling plate is mounted on the inner wall of the housing. When the battery cell generates micro-vibration, the first and second reeds bend at a high frequency. The staggered placement of the first and second reeds ensures that the two reeds do not contact or interfere with each other. The first reed drives the first friction block to rub against the outside of the battery cell, and the second reed drives the second friction block to rub against the outside of the battery cell. The friction between the first and second friction blocks generates heat, converting the vibration into frictional heat energy, which is transferred to the cooling plate through the heat conductive block.

[0008] The vertical vibration damping device includes a fixed plate mounted on the inner wall of the battery box. A guide post is slidably mounted on the fixed plate. A pressure plate is mounted on one side of the guide post and mounted below the outer shell. A first spring is sleeved on the outer side of the guide post. One side of the first spring is mounted on the pressure plate, and the other side of the first spring is mounted on the fixed plate. A limit plate is mounted on one side of the guide post and mounted on the bottom of the fixed plate. A drive device and a lateral vibration damping device are mounted above the fixed plate. One side of the drive device is mounted on the cooling device, and one side of the lateral vibration damping device is mounted on the cooling device. When vertical vibration occurs, the battery pack drives the pressure plate downward, which drives the guide post to slide downward within the fixed plate. The first spring stretches and drives the pressure plate upward, which in turn drives the battery pack upward. This movement is repeated, and the elastic deformation of the first spring absorbs the vertical vibration.

[0009] The driving device includes a piston body, which is mounted on a fixed plate, and a piston is slidably mounted inside the piston body, a piston rod is mounted on one side of the piston, and one side of the piston rod is mounted on a pressure plate, an oil inlet pipe is mounted on one side of the piston body, a first one-way valve is mounted inside the oil inlet pipe, an oil supply tank is mounted on one side of the oil inlet pipe, an oil outlet pipe is mounted on the other side of the piston body, a second one-way valve is mounted inside the oil outlet pipe, a support block is mounted on one side of the second one-way valve, a first rotating shaft is rotatably mounted inside the support block, a propeller fan and a first bevel gear are mounted on the first rotating shaft, a second rotating shaft is rotatably mounted on the inner wall of the oil outlet pipe, a second bevel gear is mounted on one side of the second rotating shaft, the first bevel gear and the second bevel gear are meshed, and the other side of the second rotating shaft is mounted on the cooling device, an oil collecting tank is mounted on one side of the oil outlet pipe, and the oil supply tank and the oil collecting tank are connected by a pipeline. When the pressure plate moves downward, the pressure plate drives the piston rod to move downward, and the piston rod drives the piston to move downward, and the piston compresses the hydraulic oil in the piston body. At this time, the first one-way valve is closed, and the hydraulic oil drives the second one-way valve to open. The hydraulic oil in the piston body is compressed into the oil outlet pipe and transported to the oil collecting tank through the oil outlet pipe. The hydraulic oil in the oil collecting tank enters the oil supply tank from the pipeline, and the hydraulic oil in the oil outlet pipe drives the propeller fan to rotate, and the propeller fan drives the first shaft to rotate, the first shaft drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the second shaft to rotate, and the second shaft drives the first turbine to rotate. When the pressure plate moves upward, the pressure plate drives the piston rod to move upward, and the piston rod drives the piston to move upward. Negative pressure is formed in the piston body, which opens the first one-way valve, and the hydraulic oil in the oil supply tank is transported from the oil inlet pipe to the piston body. At this time, the second one-way valve is closed.

[0010] The lateral vibration damping device includes a mounting block mounted below a pressure plate. A third rotating shaft is rotatably mounted on the mounting block. A pendulum is mounted on one side of the third rotating shaft, and a first gear is mounted on the other side of the third rotating shaft. A support plate is mounted on a fixed plate. A fourth rotating shaft is rotatably mounted on the support plate. A rotating plate is mounted on one side of the fourth rotating shaft, and the other side of the fourth rotating shaft is mounted on the cooling device. A second gear is rotatably mounted on one side of the support plate. The first gear and the second gear are meshed. A ratchet is mounted on the inner wall of the second gear, a pawl is mounted on the outer side of the rotating plate, and a second spring is mounted between the pawl and the rotating plate. The ratchet and pawl mesh. When lateral vibration occurs, the pendulum swings, driving the third rotating shaft to rotate. The third rotating shaft drives the first gear, which in turn drives the second gear, which in turn drives the ratchet. When the first gear rotates forward, the ratchet drives the pawl to move, which in turn drives the rotating plate, which in turn drives the fourth rotating shaft, which in turn drives the second turbine. When the first gear rotates reversely, the ratchet slides on the pawl, and the rotating plate stops rotating.

[0011] The cooling device includes an inlet pipe, which is mounted on the battery box. A first turbine chamber is mounted on one side of the inlet pipe. A first turbine is rotatably mounted inside the first turbine chamber, which is mounted on a second rotating shaft. A confluence pipe is mounted on one side of the first turbine chamber. A diversion pipe is mounted on one side of the confluence pipe. The diversion pipe is mounted on one side of the cooling plate. A return pipe is mounted on one side of the diversion pipe. A second turbine chamber is mounted on one side of the return pipe. A second turbine chamber rotatably mounts inside the second turbine chamber, which is mounted on a fourth rotating shaft. An outlet pipe is mounted on one side of the second turbine chamber. An external cooling water pump delivers coolant into the inlet pipe. When the coolant enters the first turbine chamber, the first turbine accelerates the coolant flow rate. The first turbine then delivers the coolant through the confluence pipe and into the diversion pipe. The coolant in the diversion pipe removes heat from the cooling plate. After absorbing heat, the coolant enters the return pipe, passes through the second turbine, and is delivered to the outlet pipe. Finally, the coolant is delivered to the outside.

[0012] A rubber block is installed on one side of the limiting plate.

[0013] The interior of the fire extinguishing device is filled with potassium-based fire extinguishing agent.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts active fire suppression technology. Through active monitoring and rapid response mechanisms, when it detects that the temperature inside the battery has reached the critical threshold where thermal runaway is about to occur and is irreversible, it releases a potassium-based fire extinguishing agent with the ability to suppress open flames before an explosion or fire occurs. In a very short time, a uniformly distributed fire suppression environment is formed around the battery module, suppressing the fire chain reaction caused by thermal runaway at the source, effectively preventing explosion accidents caused by battery thermal runaway, and reducing the safety threat to the heavy truck body and drivers and passengers. 2. This invention uses a vibration reduction technology that works in synergy, both vertically and horizontally. When new energy vehicles frequently encounter severe bumps on complex roads, it effectively absorbs and disperses vibration energy from the road surface. This provides a buffering effect in both the vertical and lateral directions, preventing the displacement, loosening, or peeling of active materials within the battery cells due to continuous vibration. This can lead to increased internal resistance, uneven current distribution, and severe localized heating. This reduces the possibility of thermal runaway and improves the operational and thermal stability of new energy vehicle battery packs. 3. The present invention adopts intelligent cooling technology. When the battery block vibrates, the flow of coolant will be accelerated according to the amplitude of the vibration, and the area where the temperature rises due to the vibration will be cooled down. The vibration is converted into a power source for heat dissipation, forming a coordinated control effect of vibration and cooling at the same time, ensuring that the battery module always operates within a safe temperature range, avoiding problems such as thermal runaway and performance degradation caused by abnormal temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an exploded view of the new energy vehicle battery pack of the present invention; Figure 2 This is a schematic diagram of the internal structure of the new energy vehicle battery pack of the present invention; Figure 3 An exploded view of the battery pack of the present invention; Figure 4 is a perspective view of a fire suppression device according to the present invention; Figure 5 is a perspective view of the energy dissipation device of the present invention; Figure 6 is a perspective view of the vertical vibration reduction device of the present invention; Figure 7 An exploded view of the driving device of the present invention; Figure 8 is a perspective view of the lateral vibration damping device of the present invention; Figure 9 for Figure 8 A partial enlarged view of area A in the middle; Figure 10 It is a three-dimensional diagram of the cooling device of the present invention.

[0016] In the figure: 1. Battery box; 2. First sealing plate; 3. Battery pack; 31. Housing; 32. Second sealing plate; 33. Battery cell; 34. First pressure relief valve; 35. Fire suppression device; 351. Temperature control switch; 352. First wire; 353. Second wire; 354. Starting power supply; 355. Ignition bridge wire; 356. Fire extinguishing device; 36. Energy dissipation device; 361. First reed; 362. First friction block; 363. Second reed; 364. Second friction block; 365. Heat conduction block; 4. Vertical vibration damping device; 41. Fixing plate; 42. Pressure plate; 43. Guide column; 45. Driving device; 451. Piston body; 452. Piston; 453. Piston rod; 454. Oil supply tank; 455. Oil outlet pipe; 456. Oil collecting tank; 457. Propeller fan; 458. First bevel gear; 459. Second bevel gear; 46. Lateral vibration damping device; 461. Mounting block; 462. Pendulum; 463. First gear; 464. Support plate; 465. Second gear; 466. Rotating plate; 5. Cooling device; 51. Water inlet pipe; 52. First turbine chamber; 53. Converging pipe; 54. Diverter pipe; 55. Return pipe; 56. Second turbine chamber; 57. Water outlet pipe. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0018] Example: Figures 1-10 As shown, the present invention provides a technical solution, including a battery box 1, a first sealing plate 2 is installed on one side of the battery box 1, a vertical vibration reduction device 4 is installed inside the battery box 1, a battery pack 3 is installed on one side of the vertical vibration reduction device 4, a cooling device 5 is installed on one side of the battery pack 3, and the battery pack 3 and the cooling device 5 are installed inside the battery box 1.

[0019] The battery pack 3 includes a shell 31, which is mounted on the vertical vibration damping device 4. A second sealing plate 32 is mounted on one side of the shell 31. A battery cell 33 is mounted inside the shell 31. A first pressure relief valve 34 is mounted on the battery cell 33. A fire suppression device 35 is mounted above the battery cell 33. An energy dissipation device 36 is mounted on one side of the battery cell 33. A second pressure relief valve is mounted on one side of the shell 31.

[0020] The fire suppression device 35 includes a temperature control switch 351, which is installed above the battery unit 33. The temperature control switch 351 is located on one side of the first pressure relief valve 34. A first wire 352 and a second wire 353 are installed on one side of the temperature control switch 351. A starting power supply 354 is installed on one side of the first wire 352. An ignition bridge wire 355 is installed on one side of the second wire 353. A third wire is installed between the starting power supply 354 and the ignition bridge wire 355. A fire extinguishing device 356 is installed below the ignition bridge wire 355. The starting power supply 354 and the fire extinguishing device 356 are installed on the inner wall of the outer shell 31. The interior of the fire extinguishing device 356 is filled with a potassium-based fire extinguishing agent.

[0021] When the battery cell 33 continues to heat up abnormally and reaches the critical temperature of irreversible thermal runaway, the temperature control switch 351 starts to work, and the temperature control switch 351 changes from the normally open state to the normally closed state, the circuit is connected, the ignition bridge wire 355 is heated and activated, and the potassium-based fire extinguishing agent in the fire extinguishing device 356 is ignited. The potassium-based fire extinguishing agent decomposes due to heat and releases potassium oxide mist into the shell 31 through the nozzle. The micron-sized potassium oxide mist particles fill the entire shell 31, forming an inhibitory environment. When the thermal runaway explosion generates flames, they encounter the potassium oxide mist particles, and the free radicals in the flame and the free radicals in the potassium oxide mist particles undergo a chain reaction. The chemical reaction quickly interrupts the chain reaction of the flame, and the open flame fails to form an effective continuous combustion process and has come to an end. At the same time, the surface energy of the potassium oxide mist particles is extremely high and can absorb a large amount of heat. At the end of the first wave of explosion, due to the lack of high temperature generated by the continuous combustion of the open flame, the temperature inside the shell 31 drops rapidly, and the heat spread capacity is insufficient to heat other normal battery cells 33 to cause thermal runaway. When the open flame disappears, the potassium oxide mist is discharged out of the second pressure relief valve along with most of the gas generated by the battery cell 33, and a small amount of potassium oxide mist remains in the shell 31, providing a continuous suppression effect, which can cope with the next wave of thermal runaway explosion and fire.

[0022] The energy dissipation device 36 includes a first reed 361, which is installed on one side of the battery cell 33. A second reed 363 is installed on one side of the first reed 361, which is installed on one side of the battery cell 33. The first reed 361 and the second reed 363 are installed between two battery cells 33. The first reed 361 and the second reed 363 are installed alternately. A heat insulating plate is installed between the first reed 361 and the second reed 363. A first friction block 362 is installed at one end of the first reed 361, which slides on one side of the battery cell 33. A second friction block 364 is installed at one end of the second reed 363, which slides on one side of the battery cell 33. A heat conductive block 365 is installed at one end of the battery cell 33. A cooling plate is installed at one end of the heat conductive block 365, which is installed on the inner wall of the outer shell 31. When the battery cell 33 generates micro-vibration, the first reed 361 and the second reed 363 bend at a high frequency. The staggered placement of the first reed 361 and the second reed 363 can ensure that the two reeds will not contact and interfere with each other. The first reed 361 drives the first friction block 362 to rub on the outside of the battery cell 33, and the second reed 363 drives the second friction block 364 to rub on the outside of the battery cell 33. The first friction block 362 and the second friction block 364 generate heat through friction, converting the vibration into frictional heat energy, and the heat is transferred to the cooling plate through the heat conductive block 365.

[0023] The vertical vibration damping device 4 includes a fixing plate 41, which is installed on the inner wall of the battery box 1. A guide column 43 is slidably installed on the fixing plate 41, and a pressure plate 42 is installed on one side of the guide column 43. The pressure plate 42 is installed below the outer shell 31. A first spring is sleeved on the outer side of the guide column 43, one side of the first spring is installed on the pressure plate 42, and the other side of the first spring is installed on the fixing plate 41. A limiting plate is installed on one side of the guide column 43, and the limiting plate is installed at the bottom of the fixing plate 41. A rubber block is installed on one side of the limiting plate. A driving device 45 and a lateral vibration damping device 46 are installed above the fixing plate 41. One side of the driving device 45 is installed on the cooling device 5, and one side of the lateral vibration damping device 46 is installed on the cooling device 5. When vertical vibration occurs, the battery pack 3 drives the pressure plate 42 to move downward, and the pressure plate 42 drives the guide column 43 to slide downward in the fixed plate 41. The first spring stretches and drives the pressure plate 42 to move upward, and the pressure plate 42 drives the battery pack 3 to move upward. The above movement is repeated, and the vertical vibration is absorbed by the elastic deformation of the first spring.

[0024] The driving device 45 includes a piston body 451, which is mounted on the fixed plate 41. A piston 452 is slidably mounted inside the piston body 451. A piston rod 453 is mounted on one side of the piston 452. One side of the piston rod 453 is mounted on the pressure plate 42. An oil inlet pipe is mounted on one side of the piston body 451. A first one-way valve is mounted inside the oil inlet pipe. A replenishing oil tank 454 is mounted on one side of the oil inlet pipe. An oil outlet pipe 455 is mounted on the other side of the piston body 451. A second one-way valve is mounted inside the oil outlet pipe 455. A support block is installed on one side of the second one-way valve, and a first rotating shaft is rotatably installed inside the support block. A propeller fan 457 and a first bevel gear 458 are installed on the first rotating shaft. A second rotating shaft is rotatably installed on the inner wall of the oil outlet pipe 455, and a second bevel gear 459 is installed on one side of the second rotating shaft. The first bevel gear 458 and the second bevel gear 459 are engaged. The other side of the second rotating shaft is installed on the cooling device 5, and an oil collecting tank 456 is installed on one side of the oil outlet pipe 455. The oil supply tank 454 and the oil collecting tank 456 are connected by a pipeline.

[0025] When the pressure plate 42 moves downward, the pressure plate 42 drives the piston rod 453 to move downward, and the piston rod 453 drives the piston 452 to move downward. The piston 452 compresses the hydraulic oil in the piston body 451. At this time, the first one-way valve is closed, and the hydraulic oil drives the second one-way valve to open. The hydraulic oil in the piston body 451 is compressed into the oil outlet pipe 455 and is transported to the oil collecting tank 456 through the oil outlet pipe 455. The hydraulic oil in the oil collecting tank 456 enters the oil replenishing tank 454 from the pipeline. The hydraulic oil in the oil outlet pipe 455 drives the propeller 457 to rotate, and the propeller 45 7 drives the first rotating shaft to rotate, the first rotating shaft drives the first bevel gear 458 to rotate, the first bevel gear 458 drives the second bevel gear 459 to rotate, the second bevel gear 459 drives the second rotating shaft to rotate, and the second rotating shaft drives the first turbine to rotate. When the pressure plate 42 moves upward, the pressure plate 42 drives the piston rod 453 to move upward, and the piston rod 453 drives the piston 452 to move upward. Negative pressure is formed in the piston body 451, causing the first one-way valve to open, and the hydraulic oil in the oil replenishing tank 454 is transported from the oil inlet pipe to the piston body 451. At this time, the second one-way valve is closed.

[0026] The lateral vibration damping device 46 includes a mounting block 461, which is installed below the pressure plate 42. A third rotating shaft is rotatably installed on the mounting block 461, a pendulum 462 is installed on one side of the third rotating shaft, and a first gear 463 is installed on the other side of the third rotating shaft. A support plate 464 is installed on the fixed plate 41, a fourth rotating shaft is rotatably installed on the support plate 464, a rotating plate 466 is installed on one side of the fourth rotating shaft, and the other side of the fourth rotating shaft is installed on the cooling device 5. A second gear 465 is rotatably installed on one side of the support plate 464, the first gear 463 and the second gear 465 are meshed, a ratchet is installed on the inner wall of the second gear 465, a pawl is installed on the outer side of the rotating plate 466, a second spring is installed between the pawl and the rotating plate 466, and the ratchet and pawl are meshed. When lateral vibration occurs, the pendulum 462 swings, and the pendulum 462 drives the third rotating shaft to rotate, the third rotating shaft drives the first gear 463 to rotate, the first gear 463 drives the second gear 465 to rotate, and the second gear 465 drives the ratchet to rotate. When the first gear 463 rotates forward, the ratchet drives the pawl to move, the pawl drives the rotating plate 466 to rotate, the rotating plate 466 drives the fourth rotating shaft to rotate, and the fourth rotating shaft drives the second turbine to rotate. When the first gear 463 rotates reversely, the ratchet slides on the pawl and the rotating plate 466 stops rotating.

[0027] The cooling device 5 includes a water inlet pipe 51, which is installed on the battery box 1. A first turbine chamber 52 is installed on one side of the water inlet pipe 51. A first turbine chamber 52 is rotatably installed inside the first turbine chamber 52, and the first turbine is installed on the second rotating shaft. A confluence pipe 53 is installed on one side of the first turbine chamber 52, and a diversion pipe 54 is installed on one side of the confluence pipe 53. The diversion pipe 54 is installed on one side of the cooling plate, and a return pipe 55 is installed on one side of the diversion pipe 54. A second turbine chamber 56 is installed on one side of the return pipe 55. A second turbine is rotatably installed inside the second turbine chamber 56, and the second turbine is installed on the fourth rotating shaft. A water outlet pipe 57 is installed on one side of the second turbine chamber 56. The external cooling water pump delivers the coolant to the water inlet pipe 51. When the coolant enters the first turbine chamber 52, the first turbine accelerates the flow rate of the coolant. The first turbine delivers the coolant through the confluence pipe 53 to the diversion pipe 54. The coolant in the diversion pipe 54 takes away the heat of the cooling plate. The coolant after absorbing heat enters the return pipe 55, passes through the second turbine, and delivers the coolant to the water outlet pipe 57. Finally, the coolant is delivered to the outside.

[0028] Working principle of the present invention: When the battery cell 33 continues to heat up abnormally and reaches the critical temperature of thermal runaway that is irreversible, the temperature control switch 351 starts to work, and the temperature control switch 351 changes from the normally open state to the normally closed state, the circuit is connected, the ignition bridge wire 355 is heated and activated, and the potassium-based fire extinguishing agent in the fire extinguishing device 356 is ignited. The potassium-based fire extinguishing agent decomposes due to heat and releases potassium oxide mist into the shell 31 through the nozzle. The micron-sized potassium oxide mist particles fill the entire shell 31, forming an inhibitory environment. When the thermal runaway explosion generates flames, they encounter the potassium oxide mist particles. The free radicals in the flame and the free radicals in the potassium oxide mist particles undergo a chain chemical reaction, which quickly interrupts the chain reaction of the flame, clearly The fire failed to form an effective sustained combustion process and has ended. At the same time, the surface energy of the potassium oxide mist particles is extremely high and can absorb a large amount of heat. At the end of the first wave of explosion, due to the high temperature generated by the continuous combustion of the open flame, the temperature inside the shell 31 drops rapidly, and the heat spread capacity is insufficient to heat other normal battery cells 33 to cause thermal runaway. When the open flame disappears, the potassium oxide mist is discharged out of the second pressure relief valve along with most of the gas generated by the battery cell 33, and a small amount of potassium oxide mist remains in the shell 31, providing a continuous suppression effect, which can cope with the next wave of thermal runaway explosion and fire, effectively prevent the explosion accident caused by battery thermal runaway, and reduce the safety threat to the heavy truck body and driver and passengers.

[0029] When the battery cell 33 generates micro-vibration, the first reed 361 and the second reed 363 bend at a high frequency. The staggered placement of the first reed 361 and the second reed 363 can ensure that the two reeds will not contact and interfere with each other. The first reed 361 drives the first friction block 362 to rub on the outside of the battery cell 33, and the second reed 363 drives the second friction block 364 to rub on the outside of the battery cell 33. The first friction block 362 and the second friction block 364 generate heat through friction, converting the vibration into frictional heat energy, and the heat is transferred to the cooling plate through the heat conductive block 365.

[0030] When vertical vibration occurs, the battery pack 3 drives the pressure plate 42 to move downward, and the pressure plate 42 drives the guide column 43 to slide downward in the fixed plate 41. The first spring stretches and drives the pressure plate 42 to move upward, and the pressure plate 42 drives the battery pack 3 to move upward. The above movement is repeated, and the vertical vibration is absorbed by the elastic deformation of the first spring. When the pressure plate 42 moves downward, the pressure plate 42 drives the piston rod 453 to move downward, and the piston rod 453 drives the piston 452 to move downward. The piston 452 compresses the hydraulic oil in the piston body 451. At this time, the first one-way valve is closed, and the hydraulic oil drives the second one-way valve to open. The hydraulic oil in the piston body 451 is compressed into the oil outlet pipe 455 and is transported to the oil collecting tank 456 through the oil outlet pipe 455. The hydraulic oil in the oil collecting tank 456 enters the oil filling tank 454 from the pipeline, and the hydraulic oil in the oil outlet pipe 455 drives the propeller fan 457 to rotate, the propeller fan 457 drives the first rotating shaft to rotate, the first rotating shaft drives the first bevel gear 458 to rotate, the first bevel gear 458 drives the second bevel gear 459 to rotate, the second bevel gear 459 drives the second rotating shaft to rotate, and the second rotating shaft drives the first turbine to rotate. When the pressure plate 42 moves upward, the pressure plate 42 drives the piston rod 453 to move upward, and the piston rod 453 drives the piston 452 to move upward. Negative pressure is formed in the piston body 451, causing the first one-way valve to open, and the hydraulic oil in the oil filling tank 454 is transported from the oil inlet pipe to the piston body 451. At this time, the second one-way valve is closed.

[0031] When lateral vibration occurs, the pendulum 462 swings, and the pendulum 462 drives the third rotating shaft to rotate, the third rotating shaft drives the first gear 463 to rotate, the first gear 463 drives the second gear 465 to rotate, and the second gear 465 drives the ratchet to rotate. When the first gear 463 rotates forward, the ratchet drives the pawl to move, the pawl drives the rotating plate 466 to rotate, the rotating plate 466 drives the fourth rotating shaft to rotate, and the fourth rotating shaft drives the second turbine to rotate. When the first gear 463 rotates reversely, the ratchet slides on the pawl, and the rotating plate 466 stops rotating, which can ensure that the fourth rotating shaft rotates in one direction.

[0032] The external cooling water pump delivers the coolant to the water inlet pipe 51. When the coolant enters the first turbine chamber 52, when vibration occurs, the first turbine accelerates the flow rate of the coolant. The first turbine delivers the coolant through the confluence pipe 53 to the diversion pipe 54. The coolant in the diversion pipe 54 takes away the heat of the cooling plate. The coolant after absorbing heat enters the return pipe 55, and is delivered to the water outlet pipe 57 through the second turbine. Finally, the coolant is delivered to the outside, converting the vibration into a power source for heat dissipation, forming a coordinated control effect of vibration and cooling.

[0033] 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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A new energy vehicle battery pack with active fire suppression, characterized by: The new energy vehicle battery pack comprises a battery box (1), a first sealing plate (2) is installed on one side of the battery box (1), a vertical vibration damping device (4) is installed inside the battery box (1), a battery pack (3) is installed on one side of the vertical vibration damping device (4), a cooling device (5) is installed on one side of the battery pack (3), and the battery pack (3) and the cooling device (5) are installed inside the battery box (1).

2. The new energy vehicle battery pack with active fire suppression according to claim 1, characterized in that: The battery pack (3) includes a shell (31), the shell (31) is mounted on the vertical vibration damping device (4), a second sealing plate (32) is mounted on one side of the shell (31), a battery unit (33) is mounted inside the shell (31), a first pressure relief valve (34) is mounted on the battery unit (33), a fire suppression device (35) is mounted above the battery unit (33), an energy consumption device (36) is mounted on one side of the battery unit (33), and a second pressure relief valve is mounted on one side of the shell (31).

3. The new energy vehicle battery pack with active fire suppression according to claim 2, characterized in that: The fire suppression device (35) includes a temperature control switch (351), which is installed above the battery unit (33). The temperature control switch (351) is located on one side of the first pressure relief valve (34). A first wire (352) and a second wire (353) are installed on one side of the temperature control switch (351). A starting power supply (354) is installed on one side of the first wire (352). An ignition bridge wire (355) is installed on one side of the second wire (353). A third wire is installed between the starting power supply (354) and the ignition bridge wire (355). A fire extinguishing device (356) is installed below the ignition bridge wire (355). The starting power supply (354) and the fire extinguishing device (356) are installed on the inner wall of the housing (31).

4. The new energy vehicle battery pack with active fire suppression according to claim 3, characterized in that: The energy dissipation device (36) includes a first reed (361), the first reed (361) is installed on one side of the battery unit (33), a second reed (363) is installed on one side of the first reed (361), the second reed (363) is installed on one side of the battery unit (33), the first reed (361) and the second reed (363) are installed between two battery units (33), the first reed (361) and the second reed (363) are installed in an alternating manner, and the first reed (361) and the second reed (363) are installed in an alternating manner. ), a first friction block (362) is installed at one end of the first reed (361), and the first friction block (362) slides on one side of the battery unit (33); a second friction block (364) is installed at one end of the second reed (363), and the second friction block (364) slides on one side of the battery unit (33); a heat conducting block (365) is installed at one end of the battery unit (33), and a cooling plate is installed at one end of the heat conducting block (365), and the cooling plate is installed on the inner wall of the housing (31).

5. The new energy vehicle battery pack with active fire suppression according to claim 4, characterized in that: The vertical vibration damping device (4) includes a fixing plate (41), the fixing plate (41) is mounted on the inner wall of the battery box (1), a guide column (43) is slidably mounted on the fixing plate (41), a pressure plate (42) is mounted on one side of the guide column (43), the pressure plate (42) is mounted below the housing (31), a first spring is sleeved on the outer side of the guide column (43), one side of the first spring is mounted on the pressure plate (42), and the other side of the first spring is mounted on the fixing plate (41), a limit plate is mounted on one side of the guide column (43), and the limit plate is mounted on the bottom of the fixing plate (41), a driving device (45) and a lateral vibration damping device (46) are mounted above the fixing plate (41), one side of the driving device (45) is mounted on the cooling device (5), and one side of the lateral vibration damping device (46) is mounted on the cooling device (5).

6. The new energy vehicle battery pack with active fire suppression according to claim 5, characterized in that: The driving device (45) includes a piston body (451), the piston body (451) is mounted on a fixed plate (41), a piston (452) is slidably mounted inside the piston body (451), a piston rod (453) is mounted on one side of the piston (452), and one side of the piston rod (453) is mounted on the pressure plate (42), an oil inlet pipe is mounted on one side of the piston body (451), a first one-way valve is mounted inside the oil inlet pipe, a supplementary oil tank (454) is mounted on one side of the oil inlet pipe, and an oil outlet pipe (455) is mounted on the other side of the piston body (451), and a first one-way valve is mounted inside the oil outlet pipe (455). Two one-way valves, a support block is installed on one side of the second one-way valve, a first rotating shaft is rotatably installed inside the support block, a propeller (457) and a first bevel gear (458) are installed on the first rotating shaft, a second rotating shaft is rotatably installed on the inner wall of the oil outlet pipe (455), a second bevel gear (459) is installed on one side of the second rotating shaft, the first bevel gear (458) and the second bevel gear (459) are meshed, the other side of the second rotating shaft is installed on the cooling device (5), an oil collecting tank (456) is installed on one side of the oil outlet pipe (455), and the oil supply tank (454) and the oil collecting tank (456) are connected by a pipeline.

7. The new energy vehicle battery pack with active fire suppression according to claim 6, characterized in that: The lateral vibration damping device (46) includes a mounting block (461), which is mounted below the pressure plate (42); a third rotating shaft is rotatably mounted on the mounting block (461); a pendulum (462) is mounted on one side of the third rotating shaft; a first gear (463) is mounted on the other side of the third rotating shaft; a support plate (464) is mounted on the fixed plate (41); a fourth rotating shaft is rotatably mounted on the support plate (464); a rotating plate (466) is mounted on one side of the fourth rotating shaft; the other side of the fourth rotating shaft is mounted on the cooling device (5); a second gear (465) is rotatably mounted on one side of the support plate (464); the first gear (463) and the second gear (465) are meshed; a ratchet is mounted on the inner wall of the second gear (465); a pawl is mounted on the outer side of the rotating plate (466); a second spring is mounted between the pawl and the rotating plate (466); the ratchet and the pawl are meshed.

8. The new energy vehicle battery pack with active fire suppression according to claim 7, characterized in that: The cooling device (5) includes a water inlet pipe (51), the water inlet pipe (51) is installed on the battery box (1), a first turbine chamber (52) is installed on one side of the water inlet pipe (51), a first turbine is rotatably installed inside the first turbine chamber (52), the first turbine is installed on the second rotating shaft, a confluence pipe (53) is installed on one side of the first turbine chamber (52), a diversion pipe (54) is installed on one side of the confluence pipe (53), the diversion pipe (54) is installed on one side of the cooling plate, a return pipe (55) is installed on one side of the diversion pipe (54), a second turbine chamber (56) is installed on one side of the return pipe (55), a second turbine is rotatably installed inside the second turbine chamber (56), the second turbine is installed on the fourth rotating shaft, and a water outlet pipe (57) is installed on one side of the second turbine chamber (56).

9. The new energy vehicle battery pack with active fire suppression according to claim 8, characterized in that: A rubber block is installed on one side of the limiting plate.

10. The new energy vehicle battery pack with active fire suppression according to claim 9, characterized in that: The interior of the fire extinguishing device (356) is filled with potassium-based fire extinguishing agent.

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