New energy heavy truck back-mounted power battery passive fire extinguishing device

Abstract

The application discloses a new energy heavy truck back-mounted power battery passive fire extinguishing device, which comprises an abnormality detection fire extinguishing part, a fire battery disengaging part and a fire battery disengaging part, wherein the abnormality detection fire extinguishing part comprises a battery support frame, a battery heat dissipation part and a battery fire extinguishing part, the battery heat dissipation part performs wind cooling on the battery pack in the battery support frame, and the battery fire extinguishing part performs fire extinguishing operation on the battery pack; the fire battery disengaging part comprises a battery pushing disengaging part and a battery mounting sliding part, the battery pushing disengaging part provides power for the battery mounting sliding part on the battery support frame; and the battery mounting sliding part is on the battery pushing disengaging part and pushes the battery pack on fire to throw out of the battery support frame. The application has the advantages of novel design idea, high power battery mounting efficiency, sensitive power battery thermal runaway detection and rapid power battery fire extinguishing, can throw the power battery which cannot be extinguished away from the truck, and effectively prevents the burning power battery from igniting the truck.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and more specifically, to a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck. Background Technology

[0002] Under China's "dual-carbon" goals and new energy strategy, China's new energy heavy-duty trucks have entered a stage of accelerated development. Compared with traditional fuel vehicles, new energy heavy-duty trucks are characterized by large battery capacity and large volume. Coupled with complex and variable road conditions, the emergence of new products has also brought many problems, the most prominent being the thermal runaway safety issue of heavy-duty truck power batteries, which can lead to battery combustion. Because the mechanism of thermal runaway combustion of power batteries is very complex and involves many factors, once combustion occurs, it is difficult to stop the chemical reaction. Furthermore, due to the inability to quickly and appropriately extinguish the fire, in most cases the power battery is allowed to burn completely, and the burning vehicle can even endanger the lives of passengers. Currently, the power batteries of existing new energy heavy-duty trucks are mostly installed on the truck with bolts, which is inefficient. Moreover, when the battery pack catches fire, it is impossible to quickly separate the burning battery pack from the truck, causing the truck to combust and endangering the lives of passengers. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention provides a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck, specifically adopting the following technical solution:

[0004] A passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck includes:

[0005] An anomaly detection fire extinguishing device includes a battery support frame, a battery heat dissipation component, and a battery fire extinguishing component. The battery heat dissipation component provides airflow cooling for the battery pack inside the battery support frame, and the battery fire extinguishing component performs fire extinguishing operations on the battery pack on the battery support frame.

[0006] A fire-resistant battery detachment device is disposed on the battery support frame. The fire-resistant battery detachment device includes a battery pusher and a battery mounting slider. The battery pusher provides power to the battery mounting slider on the battery support frame. The battery mounting slider pushes the burning battery pack out of the battery support frame on the battery pusher.

[0007] Preferably, the battery support frame is mounted on the truck frame; the battery support frame is divided into multiple battery housing compartments by multiple front and rear side bars.

[0008] Preferably, the battery heat dissipation component includes a chamber sealing plate and a positive pressure air supply heat dissipation component, both of which are mounted on the battery support frame. The chamber sealing plate includes a fixed sealing plate and a movable sealing cover. Multiple fixed sealing plates are fixedly mounted on the top, bottom, front, rear, and inner end faces of one end of the battery housing chamber to form an installation chamber. The movable sealing cover is rectangular in shape, and its opening is detachably fitted into a locking groove on one end face of the battery housing chamber. Multiple heat dissipation windows are provided on the movable sealing cover. The multiple installation chambers are respectively distributed at both ends of the multiple battery housing chambers, with a predetermined distance reserved between the two installation chambers in each layer.

[0009] Preferably, the positive pressure air supply heat dissipation component is connected to multiple mounting chambers on the battery support frame to dissipate heat from the battery pack in the mounting chambers by airflow; the battery fire extinguishing component is connected to multiple mounting chambers on the battery support frame to cool and extinguish the battery pack in the mounting chambers in a timely manner.

[0010] Preferably, a detection module is provided between the battery packs within the battery pack, and a smoke detector, an acoustic-optical detector, and a temperature detector are provided in the mounting chamber; the detection module, smoke detector, acoustic-optical detector, and temperature detector are all electrically connected to a data processor, which is mounted on the battery support frame. The data processor is used to receive and analyze the information transmitted by the detection module, the smoke detector, the acoustic-optical detector, and the temperature detector, and the data processing module interacts with the truck's BMS information.

[0011] Preferably, the battery pushing component includes a pushing power component, a selective pushing component, and a pushing relay component. The pushing power component provides power to the selective pushing component on the battery support frame according to the layer where the burning battery is located. The driven selective pushing component drives the pushing relay component to push the burning battery pack away from the battery support frame.

[0012] Preferably, the selection push-off component includes a front selection push-off component and a rear selection push-off component, both of which are mounted on the battery support frame. The front selection push-off component includes a selection drive shaft, a first worm gear, and a selection engagement transmission component. The selection drive shaft is rotatably fitted into a support leg of the battery support frame, and the first worm gear is located at the top of the selection drive shaft for engaging with the push-off power component. The selection engagement transmission component includes a selection engagement sliding tube, a first gear, and a magnetic coil. The selection engagement sliding tube is axially slidably mounted on the selection drive shaft. On the moving shaft, the magnetic coil is fixedly embedded in the spiral groove on the inner wall of the selection engagement sliding tube; the first gear is fixedly mounted on the selection engagement sliding tube; the rear selection push-off member has the same structure as the front selection push-off member, the rear selection push-off member is disposed in the other support leg of the battery support frame, and the connection relationship between the rear selection push-off member and the other support leg of the battery support frame is the same as the connection relationship between the front selection push-off member and the first support leg of the battery support frame. At the same time, the other support leg and the first support leg of the battery support frame are both located at one end of the battery support frame.

[0013] Preferably, the push-off relay includes a screw and a second gear. The screw is rotatably fitted into the inner wall of one end of the front rod, and the second gear is fixedly disposed on one end of the screw and can mesh with the first gear. Multiple sets of the push-off relay are sequentially disposed on multiple front rods and multiple rear rods. At the same time, the second gears of the multiple sets of push-off relays can mesh with six of the first gears sequentially. In addition, the second gears of the multiple sets of push-off relays can mesh with the first gears of multiple rear selective push-off elements sequentially.

[0014] Preferably, the battery mounting sliding component includes a pushing transmission seat, a mounting pushing component, and a mounting sliding seat. The pushing transmission seat is disposed on the push-off relay component, the mounting pushing component is disposed on the pushing transmission seat, and the mounting sliding seat is disposed on the battery support frame. The pushing transmission seat includes a nut and a transmission plate. The nut is fitted onto the screw. One end of the transmission plate passes through a sliding elongated through hole on the side wall of the front rod and is connected to the nut for follow-up movement. Another set of the pushing transmission seats is disposed on the screw of the push-off relay component inside the rear rod.

[0015] Preferably, the mounting and moving component includes a mounting and moving seat, a threaded rod, a second worm gear, a mounting drive shaft, a second worm, and a second motor. The mounting and moving seat has two ends respectively mounted on the other end of the transmission plates of the two sets of moving drive seats. One end of the threaded rod is horizontally rotatably embedded in the side wall of the mounting and moving seat, and the other end protrudes from the mounting and moving seat. The second worm gear is fitted onto the threaded rod. The mounting drive shaft is rotatably disposed within the inner cavity of the mounting and moving seat. The second worm is fitted onto the mounting drive shaft and meshes with the second worm gear. The second motor drives the mounting drive shaft to rotate on the mounting and moving seat. The mounting sliding seat is used for sliding and guiding the battery pack on the battery support frame. Multiple sets of battery mounting sliding components correspond one-to-one with multiple mounting chambers.

[0016] The present invention has at least the following beneficial effects:

[0017] 1) The passive fire extinguishing device for the rear-mounted power battery of the new energy heavy truck has a novel design concept, high power battery installation efficiency, sensitive detection of thermal runaway of power battery, and rapid fire extinguishing of power battery. It can even throw the power battery that cannot be extinguished away from the truck, effectively preventing the burning power battery from igniting the truck.

[0018] 2) The passive fire extinguishing device for the rear-mounted power battery of the new energy heavy truck of the present invention has multiple installation chambers on the battery support frame. Each installation chamber independently installs a battery pack and each installation chamber is independently connected to the battery fire extinguishing device to significantly improve its cooling and fire extinguishing efficiency. Furthermore, fireproof and heat insulation treatment is applied between adjacent installation chambers to significantly reduce the risk of thermal runaway battery packs igniting normal battery packs and significantly reduce the development of fire.

[0019] 3) The passive fire extinguishing device for the rear-mounted power battery of the new energy heavy truck of the present invention is equipped with a fire battery detachment component. The fire battery detachment component can quickly and automatically push the power battery off the truck after the fire extinguishing fails, so as to prevent the burning power battery from burning the truck and endangering the lives of the passengers.

[0020] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0021] Figure 1 This is a front view of the passive fire extinguishing device for the rear-mounted power battery of the new energy heavy truck of the present invention installed on the truck.

[0022] Figure 2 This is a three-dimensional structural diagram of the passive fire extinguishing device for the rear-mounted power battery of the new energy heavy truck of the present invention installed on the truck.

[0023] Figure 3 This is a front view of the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck according to the present invention.

[0024] Figure 4 This is a top view of the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck according to the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the left end of the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck according to the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the right end of the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the rear end of the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck according to the present invention.

[0028] Figure 8 This invention relates to a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck. Figure 1 Schematic diagram of the three-dimensional structure in the AA direction section;

[0029] Figure 9 This invention relates to a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck. Figure 8 A magnified view of part C;

[0030] Figure 10 This invention relates to a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck. Figure 9 A magnified view of part D;

[0031] Figure 11 This invention relates to a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck. Figure 2 Schematic diagram of the three-dimensional structure in the BB direction;

[0032] Figure 12 This invention relates to a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck. Figure 11 A magnified view of part E in the image;

[0033] Figure 13 This invention relates to a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck. Figure 11 A magnified view of part of F;

[0034] Figure 14 This invention relates to a passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck. Figure 2 Schematic diagram of the three-dimensional structure of the cross section in the GG direction;

[0035] Figure 15 This is a three-dimensional structural diagram of the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck according to the present invention, showing the installation of the pushing component.

[0036] Figure 16 This is a longitudinal cross-sectional three-dimensional structural diagram of the pusher component installed in the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck according to the present invention.

[0037] Figure 17 This is a schematic diagram showing the connection relationship between the movable sealing cover and the mounting chamber in the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck according to the present invention.

[0038] Figure 18 This is a longitudinal cross-sectional view of the connection relationship between the movable sealing cover and the mounting chamber in the passive fire extinguishing device for the rear-mounted power battery of a new energy heavy truck according to the present invention.

[0039] The components are as follows: 1-Battery support frame, 2-Truck, 3-Frame, 4-Front side rod, 5-Rear side rod, 6-Mounting chamber, 7-Battery pack, 8-Fixed sealing plate, 9-Movable sealing cover, 10-Fan, 11-Air supply relay pipe, 12-Positive pressure air supply branch pipe, 20-Carbon dioxide cylinder, 21-High pressure hose, 22-Gas supply relay pipe, 23-First motor, 24-Transmission rod, 25-First worm gear, 26-Selection drive shaft, 27-First worm wheel, 28-Support leg, 29-Selection meshing sliding tube, 30-First gear, 31-Screw, 32-Second gear, 33-Nut, 34-Transmission plate, 35-Mounting push seat, 36-Threaded rod, 37-Second worm wheel, 38-Mounting drive shaft, 39-Second worm gear, 40-Third gear, 41-Fourth gear, 42-Second motor, 43-Fire battery detachment component, 44-Mounting sliding seat. Detailed Implementation

[0040] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and by way of embodiments. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0041] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0042] according to Figures 1-18As shown, a passive fire extinguishing device for a rear-mounted power battery of a new energy heavy-duty truck includes an anomaly detection fire extinguishing component and a fire battery detachment component 43, the fire battery detachment component 43 being disposed on the anomaly detection fire extinguishing component. The anomaly detection fire extinguishing component includes a battery support frame 1, a battery heat sink component, and a battery fire extinguishing component, both of which are disposed on the battery support frame 1. The battery support frame 1 has a frame structure and is fixedly disposed on the chassis 3 of the truck 2 for mounting the power battery. The battery support frame 1 is provided with front side rods 4 and rear side rods 5, the six front side rods 4 and the six rear side rods 5 dividing the interior of the battery support frame 1 into six battery housing chambers. The battery housing chambers are used to install the battery pack 7.

[0043] The battery heat dissipation component includes a chamber sealing plate and a positive pressure air supply heat dissipation component, both of which are mounted on the battery support frame 1. The chamber sealing plate includes a fixed sealing plate 8 and a movable sealing cover 9. Five fixed sealing plates 8 are provided, each fixedly and sealed to the top, bottom, front, rear, and inner end faces of one end of the battery housing chamber on each layer. The movable sealing cover 9 is rectangular in shape, and its opening is detachably fitted into a retaining groove on one end face of the battery housing chamber. Furthermore, the movable sealing cover 9 is provided with multiple heat dissipation windows, which prevent rainwater from entering the battery housing chamber and also meet the positive pressure air supply and exhaust requirements of the battery housing chamber. The mounting chamber 6 formed by the chamber sealing plate is used to install the battery pack 7. It should be noted that during routine ventilation and cooling of the battery housing chamber, the movable sealing cover 9 will not be pushed out of its retaining groove. When it is necessary to push and throw out the battery pack 7 in the battery housing, the battery pack 7 will push the movable sealing cover 9 out of the fastening groove and disengage it.

[0044] The chamber sealing plates are provided in twelve sets, which are respectively distributed at both ends of the six battery housing chambers, so that each battery housing chamber in each layer has a mounting chamber 6 at both ends. A predetermined distance is reserved between the mounting chambers 6 in each layer. Furthermore, fireproof and heat-insulating cotton is provided between the chamber sealing plates of adjacent layers to prevent heat conduction between adjacent mounting chambers 6, thereby preventing the heat from being conducted to the battery packs 7 in other mounting chambers 6 if a fire occurs in one mounting chamber 6.

[0045] The positive pressure air supply heat dissipation component includes a fan 10, a positive pressure air supply duct, an air supply relay pipe 11, and positive pressure air supply branch pipes 12. The fan 10 is fixedly mounted on the battery support frame 1. One end of the positive pressure air supply duct is connected to the air outlet of the fan 10. The air supply relay pipe 11 is fixedly mounted on the battery support frame 1 and is located between the two mounting chambers 6, while the other end of the air supply relay pipe 11 is connected to the positive pressure air supply duct. One end of the positive pressure air supply branch pipe 12 is connected to the air supply relay pipe 11, and the other end of the positive pressure air supply branch pipe 12 is connected to the mounting chamber 6. A damper is provided on the positive pressure air supply branch pipe 12 to control its opening and closing. There are twelve positive pressure air supply branch pipes 12, each corresponding to one of the twelve mounting chambers 6. When the battery pack 7 is in normal use, air is supplied to the mounting chamber 6 through the positive pressure air supply heat dissipation component to dissipate heat from the battery pack 7.

[0046] A detection module is installed between the battery packs within the battery pack 7, capable of detecting temperature changes between the battery packs in real time. A smoke detector, an audible and visual detector, and a temperature detector are installed within the installation chamber 6 to monitor the environment within the chamber in real time. The detection module, smoke detector, audible and visual detector, and temperature detector are all electrically connected to a data processor mounted on the battery support frame 1. The data processor receives and analyzes information transmitted by the detection module, smoke detector, audible and visual detector, and temperature detector. Furthermore, the data processing module interacts with the BMS (Battery Management System) of the truck 2, and fire information can also be reported to the fire alarm platform.

[0047] Specifically, the detection module is located inside the battery pack 7, fixed at the upper part of the battery pack. Each battery pack 7 has one corresponding detection module, which mainly detects the current signal formed by the chemical reaction of smoke, toxic and harmful gases, and flammable gases generated by the lithium battery due to internal short circuits, overcharging and over-discharging, collisions, thermal runaway, etc. It can realize the perception, intelligent detection, and early warning of early battery fires.

[0048] Furthermore, a power transmission cable harness is installed through the inner end face. The power transmission cable harness is locked axially on the inner end face, preventing it from sliding axially. The power transmission cable harness is pluggable and detachably connected to the battery pack 7. When the battery pack 7 needs to be pushed away, the moving battery pack 7 automatically pulls out the power transmission cable harness. The power transmission cable harness is used for external power transmission.

[0049] The battery-powered fire extinguishing device includes a carbon dioxide cylinder 20, a high-pressure hose 21, a gas relay pipe 22, and a gas branch pipe. The carbon dioxide cylinder 20 is fixedly mounted on the battery support frame 1. Multiple carbon dioxide cylinders 20 are provided to meet the cooling and fire extinguishing requirements of the battery pack 7. One end of the high-pressure hose 21 is connected to a high-pressure battery valve on the carbon dioxide cylinder 20, and the high-pressure solenoid valve controls the opening and closing of the carbon dioxide cylinder 20. Multiple high-pressure hoses 21 correspond one-to-one with multiple carbon dioxide cylinders 20. The gas relay pipe 22 is fixedly mounted on the battery support frame 1, and the other end of the gas relay pipe 22 is connected to the other end of the multiple high-pressure hoses 21. One end of the gas branch pipe is connected to the gas relay pipe, and the other end is connected to the installation chamber 6. When the battery pack 7 experiences abnormal temperature and ignites, the high-pressure battery valve automatically opens for cooling and fire extinguishing. Furthermore, a nozzle is installed at the other end of the gas branch pipe within the installation chamber 6.

[0050] The fire battery detachment component 43 includes a battery pushing component and a battery mounting sliding component, both of which are mounted on the battery support frame 1. The battery pushing component includes a pushing power component, a selective pushing component, and a pushing relay component. The pushing power component includes a first motor 23, a transmission rod 24, and a first worm gear 25. The first motor 23 is fixedly mounted on the battery support frame 1 and is a dual-axis motor. One end of the transmission rod 24 is horizontally fixedly mounted on one shaft of the first motor 23, and the two transmission rods 24 correspond one-to-one with the two shafts of the first motor 23. The first worm gear 25 is fixedly mounted on the other end of the transmission rod 24, and the two first worm gears 25 correspond one-to-one with the two transmission rods 24.

[0051] The selection push-off component includes a front selection push-off component and a rear selection push-off component, both of which are mounted on the battery support frame 1. The front selection push-off component includes a selection drive shaft 26, a first worm gear 27, and a selection engagement transmission component. The selection drive shaft 26 is fitted into a support leg 28 of the battery support frame 1 via first bearings fitted at both ends, allowing the selection drive shaft 26 to rotate circumferentially and lock axially within the support leg 28. The first worm gear 27 is fixedly mounted on the top of the selection drive shaft 26 and meshes with a first worm 25. The selection engagement transmission component includes a selection engagement sliding tube 29, a first gear 30, and a magnetic coil. The selection engagement sliding tube 29 is slidably mounted on the selection drive shaft 26, and the slider on the inner wall of the selection engagement sliding tube 29 engages with a groove on the selection drive shaft 26. This allows the selection engagement sliding tube 29 to slide axially and lock circumferentially on the selection drive shaft 26. The magnetic coil is fixedly embedded in a spiral groove on the inner wall of the selection engagement sliding tube 29. When a direct current is applied to the magnetic coil to generate a magnetic field, it will push the selection engagement sliding tube 29 to slide axially back and forth on the selection transmission shaft 26, thereby driving the first gear 30 to engage with the push-off relay. The first gear 30 is a bevel gear, and the first gear 30 is fixedly mounted on the selection engagement sliding tube 29 and moves accordingly.

[0052] Furthermore, six sets of the selection engagement transmission components are provided, and the six sets of selection engagement transmission components are evenly distributed on the selection transmission shaft 26. The six sets of selection engagement transmission components correspond one-to-one with the six sets of push-off relay components for selection engagement transmission.

[0053] The rear-side selective push-off component has the same structure as the front-side selective push-off component. The rear-side selective push-off component is disposed inside the other support leg 28 of the battery support frame 1, and the connection relationship between the rear-side selective push-off component and the other support leg 28 of the battery support frame 1 is the same as the connection relationship between the front-side selective push-off component and the first support leg 28 of the battery support frame 1. At the same time, both the other support leg 28 and the first support leg 28 of the battery support frame 1 are located at one end of the battery support frame 1, so as to cooperate with each other to push one of the battery packs 7 at the same time, pushing it away from the battery support frame 1, so as to prevent the burning battery pack 7 from igniting other battery packs 7 and the truck 2.

[0054] The push-off relay includes a screw 31 and a second gear 32. The length of the screw 31 is no more than half the length of the front rod 4. The screw 31 is rotatably fitted into the inner wall of one end of the front rod 4 via second bearings fitted at both ends, allowing the screw 31 to rotate circumferentially and lock axially within the front rod 4. The second gear 32 is a bevel gear, fixedly mounted on one end of the screw 31, and capable of meshing with the first gear 30. Twelve sets of push-off relays are provided, each set corresponding to one of the six front rods 4 and six rear rods 5. Simultaneously, the second gears 32 of six sets of push-off relays can mesh with the six first gears 30, and the second gears 32 of the other six sets can mesh with the first gears 30 of the six rear push-off selectors.

[0055] The battery mounting sliding component includes a pushing transmission seat, a mounting pushing component, and a mounting sliding seat 44. The pushing transmission seat is mounted on the push-off relay component, the mounting pushing component is mounted on the pushing transmission seat, and the mounting sliding seat 44 is mounted on the battery support frame 1. The pushing transmission seat includes a nut 33 and a transmission plate 34. The nut 33 is fitted onto the screw 31. One end of the transmission plate 34 passes through a sliding elongated through hole on the side wall of the front rod 4 and is fixedly connected to the nut 33, moving with it. The sliding elongated through hole is located within the mounting chamber 6. When the screw 31 rotates, it drives the nut 33 to slide axially back and forth. Two sets of pushing transmission seats are provided. Another set of pushing transmission seats is mounted on the screw 31 of the push-off relay component within the rear rod 5. The two sets of pushing transmission seats are used to simultaneously push the mounting pushing component to move the battery pack 7 mounted on it.

[0056] The mounting and moving component includes a mounting and moving seat 35, a threaded rod 36, a second worm gear 37, a mounting drive shaft 38, a second worm 39, a third gear 40, a fourth gear 41, and a second motor 42. The mounting and moving seat 35 is rectangular tubular, and its two ends are horizontally fixed to the other end of the transmission plates 34 of the two sets of moving drive seats, so that it can be moved simultaneously by the two sets of moving drive seats. One end of the threaded rod 36 is horizontally rotatably embedded in the side wall of the mounting and moving seat 35, and the other end of the threaded rod 36 protrudes from the mounting and moving seat 35, and the axis of the threaded rod 36 is parallel to the axis of the front rod 4. This allows the threaded rod 36 to rotate circumferentially and lock axially in the mounting and moving seat 35. Three threaded rods 36 are provided, and the three threaded rods 36 are evenly distributed on the mounting and moving seat 35. The three threaded rods 36 correspond one-to-one with the three threaded holes on the battery pack 7. Furthermore, a mounting plate is fixedly provided on one end face of the battery pack 7, and the mounting plate is provided with three threaded holes to facilitate the installation of the battery pack 7.

[0057] The second worm gear 37 is fixedly mounted on the threaded rod 36, and the three second worm gears 37 correspond one-to-one with the three threaded rods 36. The mounting drive shaft 38 is rotatably disposed within the inner cavity of the mounting push seat 35, allowing the mounting drive shaft 38 to rotate circumferentially within the mounting push seat 35. The second worm 39 is fixedly mounted on the mounting drive shaft 38, and the second worm 39 meshes with the second worm gear 37, with the three second worm gears 39 corresponding one-to-one with the three second worm gears 37. The third gear 40 is a bevel gear, fixedly mounted on one end of the mounting drive shaft 38. The second motor 42 is fixedly mounted on the mounting push seat 35, and the shaft of the second motor 42 passes through the mounting push seat 35. The fourth gear 41 is a bevel gear, fixedly mounted on the shaft of the second motor 42, and meshes with the third gear 40. When the second motor 42 rotates, it drives the mounting drive shaft 38 to rotate. The mounting drive shaft 38 drives the second worm gear 37 to rotate via the screw 31. The second worm gear 37 drives the threaded rod 36 to rotate circumferentially on the mounting push seat 35. When it is necessary to install the battery pack 7 on the mounting push seat 35, the second motor 42 drives the threaded rod 36 to rotate in the forward direction. The other end of the threaded rod 36 will be screwed into the threaded hole, thereby automatically and firmly securing the battery pack 7 to the mounting push seat 35. Before pushing the burning battery pack 7 away from the battery support frame 1, the threaded rod 36 is rotated in the reverse direction to disengage the battery pack 7 from the mounting push seat 35.

[0058] The mounting slide 44 is in the shape of a right-angled plate. Two mounting slides 44 are provided: one is horizontally fixed to the front rod 4, and the other is horizontally fixed to the rear rod 5. The mounting slides 44 are used to mount the battery pack 7. Six sets of battery mounting slides are provided, each corresponding to one of the six mounting chambers 6.

[0059] The process of installing the battery pack on the battery mounting slider is as follows:

[0060] The battery pack 7 is slidably embedded in the two mounting sliding seats 44. Due to the axial guiding effect of the mounting sliding seats 44, the three threaded holes correspond one-to-one with the three threaded rods 36. At the same time, the three threaded rods 36 are driven to rotate forward, rotating the threaded rods 36 into the threaded holes, so as to install the battery pack 7 on the mounting push seat 35. With the constraint of the two mounting sliding seats 44, the battery pack 7 is firmly secured in the mounting chamber 6.

[0061] Two sets of the fire battery detachment components 43 are provided, and the two sets of fire battery detachment components 43 are respectively installed on both ends of the battery support frame 1. The twelve sets of battery mounting sliding parts of the two sets of fire battery detachment components 43 are used to install and push away the battery pack 7 inside them.

[0062] The operation of the passive fire extinguishing device for the rear-mounted power battery of the new energy heavy truck is as follows:

[0063] 1) The staff pushes one end of the battery pack 7 into the mounting sliding seat 44;

[0064] 2) The mounting and pushing mechanism is automatically activated, and one end of the battery pack 7 is automatically mounted on the mounting and pushing seat 35;

[0065] 3) Place the movable sealing cover 9 into the fastening groove;

[0066] 4) Activate the positive pressure air supply heat dissipation component to dissipate heat from the battery pack 7.

[0067] The fire extinguishing process of the passive fire extinguishing device for the rear-mounted power battery of the new energy heavy truck is as follows:

[0068] 1) The battery fire extinguishing device will activate the battery pack 7 in a timely manner to cool down and extinguish the fire if the battery pack 7 is in thermal runaway, based on the detection status of the battery pack 7.

[0069] 2) When the carbon dioxide fire extinguishing of the battery pack 7 fails, the mounting pusher is activated in reverse to disengage the battery pack 7 from the mounting pusher seat 35;

[0070] 3) Current is passed through the magnetic coil to make the first gear 30 and the second gear 32 of the ignition layer of the battery pack 7 mesh and drive;

[0071] 4) Activate the push-off power component to drive the mounting push seat 35 to slide outward. The outward sliding mounting push seat 35 drives the burning battery pack 7 to slide outward. The outward sliding burning battery pack 7 is separated from the power transmission cable harness, and then the movable sealing cover 9 is pushed out.

[0072] 5) Accelerate the rotation of the push-away power component, so that the mounting push seat 35 quickly throws the burning battery pack 7 out of the battery support frame 1, so that the burning battery pack 7 is away from the truck 2.

[0073] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck, characterized in that, include: An anomaly detection fire extinguishing device includes a battery support frame, a battery heat dissipation component, and a battery fire extinguishing component. The battery heat dissipation component provides airflow cooling for the battery pack inside the battery support frame, and the battery fire extinguishing component performs fire extinguishing operations on the battery pack on the battery support frame. A fire-resistant battery detachment device is disposed on the battery support frame. The fire-resistant battery detachment device includes a battery pusher and a battery mounting slider. The battery pusher provides power to the battery mounting slider on the battery support frame. The battery mounting slider pushes the burning battery pack out of the battery support frame on the battery pusher.

2. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 1, characterized in that, The battery support frame is mounted on the truck's chassis; the battery support frame is divided into multiple battery housing compartments by multiple front and rear side bars.

3. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 1 or 2, characterized in that, The battery heat dissipation component includes a chamber sealing plate and a positive pressure air supply heat dissipation component, both of which are mounted on the battery support frame. The chamber sealing plate includes a fixed sealing plate and a movable sealing cover. Multiple fixed sealing plates are fixedly mounted on the top, bottom, front, rear, and inner end faces of one end of the battery housing chamber to form an installation chamber. The movable sealing cover is rectangular in shape, and its opening is detachably fitted into a locking groove on one end face of the battery housing chamber. Multiple heat dissipation windows are provided on the movable sealing cover. Multiple installation chambers are respectively distributed at both ends of the multi-layer battery housing chambers, with a predetermined spacing reserved between two installation chambers in each layer.

4. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 3, characterized in that, The positive pressure air supply heat dissipation component is connected to multiple mounting chambers on the battery support frame to dissipate heat from the battery pack inside the mounting chambers by airflow; the battery fire extinguishing component is connected to multiple mounting chambers on the battery support frame to cool and extinguish the battery pack inside the mounting chambers in a timely manner.

5. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 3, characterized in that, A detection module is installed between the battery packs within the battery pack. A smoke detector, an audible and visual detector, and a temperature detector are installed in the mounting chamber. The detection module, smoke detector, audible and visual detector, and temperature detector are all electrically connected to a data processor. The data processor is installed on the battery support frame. The data processor is used to receive and analyze the information transmitted by the detection module, the smoke detector, the audible and visual detector, and the temperature detector. The data processing module also interacts with the truck's BMS information.

6. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 3, characterized in that, The battery pushing component includes a pushing power component, a selective pushing component, and a pushing relay component. The pushing power component provides power to the selective pushing component on the battery support frame according to the layer where the burning battery is located. The driven selective pushing component drives the pushing relay component to push the burning battery pack away from the battery support frame.

7. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 6, characterized in that, The selection push-off component includes a front selection push-off component and a rear selection push-off component, both of which are mounted on the battery support frame. The front selection push-off component includes a selection drive shaft, a first worm gear, and a selection engagement transmission component. The selection drive shaft is rotatably fitted into a support leg of the battery support frame, and the first worm gear is located at the top of the selection drive shaft for engaging with the push-off power component. The selection engagement transmission component includes a selection engagement sliding tube, a first gear, and a magnetic coil. The selection engagement sliding tube is axially slidably mounted on the selection drive shaft, and the magnetic coil is fixedly embedded in a spiral groove on the inner wall of the selection engagement sliding tube. The first gear is fixedly mounted on the selection and engagement sliding tube; the rear selection push-off member has the same structure as the front selection push-off member, the rear selection push-off member is disposed in the other support leg of the battery support frame, and the connection relationship between the rear selection push-off member and the other support leg of the battery support frame is the same as the connection relationship between the front selection push-off member and the first support leg of the battery support frame. At the same time, the other support leg of the battery support frame and the first support leg of the battery support frame are both located at one end of the battery support frame.

8. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 7, characterized in that, The push-off relay includes a screw and a second gear. The screw is rotatably fitted into the inner wall of one end of the front rod, and the second gear is fixedly disposed on one end of the screw and can mesh with the first gear. Multiple sets of push-off relays are sequentially and correspondingly installed on multiple front rods and multiple rear rods. At the same time, the second gears of the multiple sets of push-off relays can mesh with the six first gears in turn. In addition, the second gears of the multiple sets of push-off relays can mesh with the first gears of multiple rear select push-off components in turn.

9. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 8, characterized in that, The battery mounting sliding component includes a push-drive seat, a mounting push-drive component, and a mounting sliding seat. The push-drive seat is disposed on the push-off relay component, the mounting push-drive component is disposed on the push-drive seat, and the mounting sliding seat is disposed on the battery support frame. The push-drive seat includes a nut and a transmission plate. The nut is fitted onto the screw rod, and one end of the transmission plate passes through a sliding elongated through hole on the side wall of the front rod and is connected to the nut for follow-up. Another set of the push-drive seats is disposed on the screw rod of the push-off relay component inside the rear rod.

10. The passive fire extinguishing device for the rear-mounted power battery of a new energy heavy-duty truck according to claim 9, characterized in that, The mounting and pushing component includes a mounting and pushing seat, a threaded rod, a second worm gear, a mounting drive shaft, a second worm, and a second motor. The mounting and pushing seat is respectively mounted on the other end of the transmission plates of the two sets of pushing drive seats. One end of the threaded rod is horizontally rotatably embedded in the side wall of the mounting and pushing seat, and the other end of the threaded rod protrudes from the mounting and pushing seat. The second worm gear is mounted on the threaded rod. The mounting drive shaft is rotatably disposed in the inner cavity of the mounting and pushing seat. The second worm is mounted on the mounting drive shaft and meshes with the second worm gear. The second motor drives the mounting drive shaft to rotate on the mounting and pushing seat. The mounting slide seat is used to slide and guide the battery pack on the battery support frame; multiple sets of battery mounting slides correspond one-to-one with multiple mounting chambers.

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