A new energy vehicle automatic fire extinguishing processing system and method coupled with a BMS

Abstract

The application relates to the field of new energy automobile safety technology and discloses a new energy automobile automatic fire extinguishing treatment system and method coupled with a BMS, wherein a temperature sensor for detecting temperature changes in a battery compartment to output a temperature detection signal is arranged in the battery compartment; a BMS battery management system for receiving the temperature detection signal is coupled to the temperature sensor; and a liquid nitrogen fire extinguishing module and a solenoid valve are both coupled to and controlled by the BMS battery management system.The new energy automobile automatic fire extinguishing treatment system and method coupled with the BMS have the following advantages: the BMS battery management system can detect temperature changes in each battery compartment through multiple temperature sensors; when the temperature in a certain battery compartment is too high, the BMS battery management system can control the corresponding solenoid valve to conduct the corresponding connecting pipe and start the liquid nitrogen fire extinguishing module to release liquid nitrogen extinguishing agent; the liquid nitrogen extinguishing agent is rapidly sprayed on the surface of a battery pack through a spraying pipe to cool the battery pack and the battery compartment, thereby reducing the risk of spontaneous combustion of the battery module.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy vehicle safety technology, and particularly relates to a new energy vehicle automatic fire extinguishing processing system and method coupled with a BMS. BACKGROUND

[0002] With the development of battery, motor and electric control technology, new energy vehicles have been accepted by more and more people. Among them, the safety of the battery as an important component of the new energy vehicle is also paid more and more attention. The utility model patent with the announcement number CN215377505U discloses a similar new energy battery.

[0003] During driving, the battery needs to provide stable and persistent power source for the vehicle. When the battery outputs power for a long time, the strong chemical reaction inside the battery will cause the battery body to heat, thereby causing the temperature of the battery to rise. When the temperature of the battery rises to a certain extent, a fire is easily caused, and there is a great safety hazard. However, the driver usually cannot grasp the temperature change of the battery in time, and when the battery catches fire, it is too late, so there is room for improvement. SUMMARY

[0004] The first object of the present application is to provide a new energy vehicle automatic fire extinguishing processing system coupled with a BMS, which can trigger a liquid nitrogen fire extinguishing module when the temperature in the battery compartment is too high to cool the battery compartment, thereby ensuring the safety of the battery module.

[0005] The above technical object of the present application is achieved by the following technical scheme:

[0006] A new energy vehicle automatic fire extinguishing processing system coupled with a BMS, comprising a liquid nitrogen fire extinguishing module and a battery module, the liquid nitrogen fire extinguishing module and the battery module are connected through a manifold, the battery module comprises a shell and a pressure relief pipe arranged on one side of the shell, a plurality of battery compartments are arranged on the shell, a battery pack is arranged in each battery compartment, an upper opening of the battery compartment is covered with a cover plate, a spray pipe is arranged above the battery pack on the cover plate, a plurality of spray holes are arranged on the wall of the spray pipe, the two ends of the spray pipe are connected to the opposite side walls in the battery compartment, one end of the spray pipe is provided with a connecting pipe extending to the outside of the shell, the connecting pipes corresponding to each battery compartment are connected in series through the manifold, an electromagnetic valve for opening and closing the connecting pipe is arranged on the connecting pipe, a temperature sensor for detecting the temperature change in the battery compartment to output a temperature detection signal is arranged in the battery compartment, a BMS battery management system for receiving the temperature detection signal is coupled to the temperature sensor, and the liquid nitrogen fire extinguishing module and the electromagnetic valve are coupled to and controlled by the BMS battery management system.

[0007] By the above scheme, the BMS battery management system can detect the temperature changes in each battery compartment through multiple temperature sensors. When the temperature in a certain battery compartment is too high, the BMS battery management system can control the corresponding electromagnetic valve to conduct the corresponding adapter pipe, and start the liquid nitrogen fire extinguishing module to release liquid nitrogen extinguishing agent into the corresponding battery compartment through the manifold. The liquid nitrogen extinguishing agent is quickly sprayed on the surface of the battery pack through the spray pipe to cool the battery pack and the battery compartment, thereby reducing the risk of spontaneous combustion of the battery module. The spray pipe is arranged on the cover surface of the sealing plate, which not only effectively reduces the risk of extrusion of the spray pipe, but also makes the upper surface of the battery module more flat, thereby making the design of the battery chassis more reasonable.

[0008] Preferably, the side wall of the battery pack and the side wall of the battery compartment are spaced apart.

[0009] By the above scheme, the liquid nitrogen extinguishing agent sprayed from the spray pipe can wrap the side wall of the battery pack through the above-mentioned spacing, thereby improving the cooling effect of the battery module.

[0010] Preferably, the cross section of the spray pipe is isosceles trapezoidal and the longer base is arranged upward.

[0011] By the above scheme, the spray pipe can spray liquid nitrogen extinguishing agent towards the upper surface of the battery pack and drive the liquid nitrogen extinguishing agent to quickly spread to both sides, further improving the cooling effect of the battery module.

[0012] Preferably, the battery pack includes two horizontally arranged sub-battery packs, the spray pipe is located between the two sub-battery packs, the lower pipe wall of the spray pipe extends downward to a partition plate inserted between the two sub-battery packs, the lower edge of the partition plate extends below the two sub-battery packs, the lower edge of the partition plate extends to the lower sub-partition plates located below the two sub-battery packs on both sides, the upper and lower surfaces of the lower sub-partition plates are spaced apart from the bottom of the sub-battery pack and the bottom of the battery compartment, respectively, the two side surfaces of the partition plate are spaced apart from the two sub-battery packs on both sides, respectively, a through slot is formed in the partition plate along the surface direction of the partition plate, the upper end of the through slot is communicated with the inner cavity of the spray pipe, the lower end of the through slot is communicated with the space between the lower sub-partition plate and the bottom of the battery compartment, and the inner side wall of the through slot and the surface of the lower sub-partition plate are both distributed with liquid discharge holes.

[0013] By the above scheme, the liquid nitrogen extinguishing agent released by the liquid nitrogen fire extinguishing module enters the spray pipe through the manifold and the adapter pipe, which can cover the upper surface of the battery pack through the spray holes on the spray pipe, and enter the gap between the two battery packs and the bottom through the through slot in the partition plate, so that the liquid nitrogen extinguishing agent can surround the battery pack, further improving the cooling effect of the battery module.

[0014] Preferably, a buffer plate is arranged at the joint of the through slot and the spray pipe, a plurality of flow guide holes are distributed on the buffer plate along the length direction of the spray pipe, and a plug is sealingly arranged in the flow guide hole.

[0015] With the above scheme, under the blocking of the buffer plate and the plug, the liquid nitrogen extinguishing agent entering the spray pipe will first cover the upper surfaces of the two battery packs through the spray holes to quickly cut off the temperature conduction between the battery chassis and the automobile parts above, thereby improving the safety of the automobile parts above the chassis and the passengers. After the liquid nitrogen extinguishing agent fills the entire upper surface of the battery pack, the pressure value in the spray pipe will continue to rise due to the continuous operation of the liquid nitrogen extinguishing module. When the pressure rises to a certain extent, the liquid nitrogen extinguishing agent can push off the plug in the flow guide hole, so that the liquid nitrogen extinguishing agent can enter the through groove of the partition through the flow guide hole, thereby cooling the gap between the two battery packs and the bottom, and cutting off the heat source. The above working process can give priority to protecting the safety of passengers' lives and property, leaving more time for passengers to handle accidents and escape, and at the same time, can minimize the risk of thermal runaway of the battery module.

[0016] Preferably, the upper end face of the plug is provided with a groove.

[0017] With the above scheme, the groove can increase the impact force of the liquid nitrogen extinguishing agent on the plug, so that the plug is more easily pushed off, thereby improving the conduction efficiency of the flow guide hole and the cooling speed of the battery pack.

[0018] Preferably, a slider connected to the plug and capable of sliding in the vertical direction is arranged below the flow guide hole, and a locking member is arranged in the through groove to suspend the slider in the middle of the through groove.

[0019] With the above scheme, the plug pushed off by the liquid nitrogen extinguishing agent moves downward with the slider and suspends in the middle of the through groove, which can form a support in the middle of the through groove, avoiding the through groove being blocked due to the compression of the partition by the bulging battery pack, thereby ensuring that the liquid nitrogen extinguishing agent can smoothly pass through the through groove and enter the bottom of the two battery packs.

[0020] Preferably, the two opposite side walls of the through groove are provided with vertical guide rails corresponding to the position of the slider, and the two sides of the slider are provided with sliding grooves respectively slidingly connected to the two guide rails.

[0021] With the above scheme, the sliding and connecting cooperation between the sliding groove and the guide rail can ensure the stable sliding of the slider and the plug in the through groove, avoiding position deviation during sliding.

[0022] Preferably, the locking member is a protrusion arranged in the middle of the guide rail to support the lower surface of the slider.

[0023] With the above scheme, the protrusion structure is simple, which can ensure that the slider and the plug are stably suspended in the middle of the through groove.

[0024] The second object of the present application is to provide a new energy vehicle automatic fire extinguishing processing method coupled with a BMS, which can accurately determine whether the temperature of the battery compartment reaches a high-risk critical point and timely trigger the liquid nitrogen fire extinguishing module when the temperature is too high to quickly reduce the temperature of the battery compartment, thereby reducing the risk of spontaneous combustion of the battery module due to high temperature.

[0025] The above technical objects of the present application are achieved by the following technical solutions:

[0026] A new energy vehicle automatic fire extinguishing processing method coupled with a BMS adopts the above system, and a temperature threshold is preset in the BMS battery management system. When the temperature sensor detects that the temperature value in the corresponding battery compartment is greater than the temperature threshold, the BMS battery management system first controls the electromagnetic valve corresponding to the battery compartment to conduct the connecting pipe, and then controls the liquid nitrogen fire extinguishing module to release the liquid nitrogen extinguishing agent to the manifold.

[0027] By comparing the temperature value measured by the temperature sensor with the temperature threshold, the BMS battery management system can accurately determine whether the temperature in the battery compartment reaches a high-risk critical point, and timely start the liquid nitrogen fire extinguishing module when the temperature is too high to release the liquid nitrogen extinguishing agent to the spray pipe through the manifold and the connecting pipe, thereby quickly reducing the temperature of the battery compartment and the battery pack, and further reducing the risk of spontaneous combustion of the battery module.

[0028] The present application has the following technical effects:

[0029] 1. The BMS battery management system can detect the temperature change in each battery compartment through multiple temperature sensors. When the temperature in a certain battery compartment is too high, the BMS battery management system can control the corresponding electromagnetic valve to conduct the corresponding connecting pipe and start the liquid nitrogen fire extinguishing module to release the liquid nitrogen extinguishing agent to the spray pipe in the corresponding battery compartment through the manifold. The liquid nitrogen extinguishing agent is quickly sprayed on the surface of the battery pack through the spray pipe to cool the battery pack and the battery compartment, thereby reducing the risk of spontaneous combustion of the battery module. The spray pipe is arranged on the closed surface of the sealing plate, which not only effectively reduces the risk of extrusion of the spray pipe, but also makes the upper surface of the battery module more flat, thereby making the design of the battery chassis more reasonable.

[0030] 2. By comparing the temperature value measured by the temperature sensor with the temperature threshold, the BMS battery management system can accurately determine whether the temperature in the battery compartment reaches a high-risk critical point, and timely start the liquid nitrogen fire extinguishing module when the temperature is too high to release the liquid nitrogen extinguishing agent to the spray pipe through the manifold and the connecting pipe, thereby quickly reducing the temperature of the battery compartment and the battery pack, and further reducing the risk of spontaneous combustion of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The system structure diagram of the present embodiment is shown in the figure;

[0032] Figure 2 Structure diagram of the embodiment Figure 1 ;

[0033] Figure 3 Structure diagram of the embodiment Figure 2 ;

[0034] Figure 4 Enlarged diagram of A part shown in Figure 3 ;

[0035] Figure 5 Enlarged diagram of B part shown in Figure 2 ;

[0036] Figure 6 System architecture diagram of the embodiment

[0037] Figure 7 Structure diagram of the embodiment Figure 3 ;

[0038] Figure 8 Enlarged diagram of C part shown in Figure 7 ;

[0039] Figure 9 Structure diagram of the embodiment Figure 4 ;

[0040] Figure 10 Structure diagram of the embodiment Figure 5 ;

[0041] Figure 11 Enlarged diagram of D part shown in Figure 8 .

[0042] The names of the parts referred to by the respective numbers in the above drawings are as follows: 1, liquid nitrogen fire extinguishing module; 2, battery module; 3, header pipe; 4, shell; 5, pressure relief pipe; 6, battery compartment; 7, battery pack; 8, sealing plate; 9, spray pipe; 10, spray hole; 11, adapter pipe; 12, electromagnetic valve; 13, temperature sensor; 14, BMS battery management system; 15, sub-battery pack; 16, partition plate; 17, lower partition plate; 18, through groove; 19, liquid discharge hole; 20, buffer plate; 21, flow guide hole; 22, plug; 23, recess; 24, sliding block; 25, locking member; 26, guide rail; 27, sliding groove; 29, cushion block. DETAILED DESCRIPTION

[0043] The application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0044] Embodiment One

[0045] As Figures 1 to 6As shown, the embodiment discloses a new energy vehicle automatic fire extinguishing processing system coupled with BMS, which comprises a liquid nitrogen fire extinguishing module 1 and a battery module 2. The liquid nitrogen fire extinguishing module 1 and the battery module 2 are connected through a manifold 3. Specifically, the battery module 2 comprises a shell 4 and a pressure relief pipe 5 arranged on one side of the shell 4. The shell 4 is provided with a plurality of battery compartments 6, and the battery compartments 6 are provided with battery packs 7. The upper opening of the battery compartment 6 is covered with a sealing plate 8, and the covering surface of the sealing plate 8 is provided with a spray pipe 9 above the battery pack 7. The pipe wall of the spray pipe 9 is provided with a plurality of spray holes 10, and the two ends of the spray pipe 9 are connected to the opposite side walls in the battery compartment 6. In order to realize the connection between the liquid nitrogen fire extinguishing module 1 and the spray pipe 9, one end of the spray pipe 9 is provided with a connecting pipe 11 extending to the outside of the shell 4, and each connecting pipe 11 corresponding to the battery compartment 6 is connected in series through the manifold 3. The connecting pipe 11 is provided with a solenoid valve 12 for opening and closing the connecting pipe 11. The battery compartment 6 is provided with a temperature sensor 13 for detecting the temperature change in the battery compartment 6 to output a temperature detection signal. The temperature sensor 13 is coupled with a BMS battery management system 14 for receiving the temperature detection signal. The liquid nitrogen fire extinguishing module 1 and the solenoid valve 12 are coupled with and controlled by the BMS battery management system 14.

[0046] As shown in Figure 3 In order to enable the liquid nitrogen extinguishing agent released by the liquid nitrogen fire extinguishing module 1 to wrap around the outside of the battery pack 7, a gap is maintained between the side wall of the battery pack 7 and the side wall of the battery compartment 6, thereby improving the cooling effect of the battery module 2.

[0047] As shown in Figure 4 In order to improve the efficiency of the spray pipe 9 spraying liquid nitrogen extinguishing agent to improve the cooling effect of the battery module 2, the cross section of the spray pipe 9 is isosceles trapezoidal and the longer base is arranged upward.

[0048] As shown in Figure 7 , Figure 8 and Figure 9As shown, in order to improve the cooling efficiency of the battery module 2, the battery pack 7 comprises two horizontally arranged sub-battery packs 15, and the spray pipe 9 is located between the two sub-battery packs 15, and the lower pipe wall of the spray pipe 9 extends downwardly and is inserted into the partition plate 16 between the two sub-battery packs 15, and the lower edge of the partition plate 16 extends below the two sub-battery packs 15. The lower edge of the partition plate 16 extends to the lower partition plates 17 located below the two sub-battery packs 15, respectively, and the upper and lower plate surfaces of the lower partition plates 17 are spaced apart from the bottom of the sub-battery pack 15 and the bottom of the battery compartment 6, respectively, and the two side plate surfaces of the partition plate 16 are spaced apart from the two sub-battery packs 15, respectively. Specifically, a plurality of pads 29 are arranged between the partition plate 16 and the side wall of the battery pack 7 and between the lower partition plate 17 and the bottom of the battery pack 7, which can not only ensure the stability of the gap between the partition plate 16, the lower partition plate 17 and the battery pack 7, but also improve the rigidity of the partition plate 16 and the lower partition plate 17. The partition plate 16 is internally provided with a through slot 18 extending along the plate surface direction thereof, the upper end of the through slot 18 is communicated with the inner cavity of the spray pipe 9, the lower end of the through slot 18 is communicated with the space between the lower partition plate 17 and the bottom of the battery compartment 6, and the inner side wall of the through slot 18 and the plate surface of the lower partition plate 17 are both provided with drainage holes 19, so that the liquid nitrogen extinguishing agent entering the through slot 18 and below the lower partition plate 17 can fully contact the sub-battery pack 15 through the drainage holes 19, thereby improving the cooling effect of the battery module 2.

[0049] As shown in Figure 4 , in order to ensure the safety of passengers' personal property as much as possible, a buffer plate 20 is arranged at the joint of the through slot 18 and the spray pipe 9, the buffer plate 20 is distributed with a plurality of flow guide holes 21 along the length direction of the spray pipe 9, and a plug 22 is sealingly arranged in the flow guide hole 21. The upper end surface of the plug 22 is provided with a groove 23.

[0050] As shown in Figure 8 , Figure 10 and Figure 11 , in order to keep the through slot 18 unobstructed, a sliding block 24 connected to the plug 22 and capable of sliding in the vertical direction is arranged below the flow guide hole 21, and a locking member 25 is arranged in the through slot 18 to suspend the sliding block 24 in the middle of the through slot 18. Specifically, the two opposite side walls of the through slot 18 are provided with vertical guide rails 26 corresponding to the position of the sliding block 24, and the two sides of the sliding block 24 are provided with sliding grooves 27 respectively slidingly connected to the two guide rails 26, and the sliding grooves 27 and the guide rails 26 are slidingly connected and matched, which can improve the stability and smoothness of the longitudinal sliding of the sliding block 24. The locking member 25 is a protrusion arranged in the middle of the guide rail 26 to support the lower surface of the sliding block 24.

[0051] Example Two

[0052] On the basis of example one, the new energy vehicle automatic fire extinguishing processing method with the coupling BMS of the above system disclosed in this example, the BMS battery management system 14 is preset with a temperature threshold value, when the temperature sensor 13 detects that the temperature value in the corresponding battery compartment 6 is greater than the temperature threshold value, the BMS battery management system 14 first controls the electromagnetic valve 12 corresponding to the battery compartment 6 to conduct the adapter pipe 11, and then controls the liquid nitrogen fire extinguishing module 1 to release the liquid nitrogen extinguishing agent to the collecting pipe 3, so as to cool the high temperature battery compartment 6 and avoid the self-ignition phenomenon of the battery module 2.

[0053] Now the working principle is described in combination with example one and example two:

[0054] When the battery module 2 is normally operated, if the battery pack 7 in a certain battery compartment 6 appears overheating phenomenon, which causes the temperature in the battery compartment 6 to exceed the temperature threshold value and be captured by the temperature sensor 13. At this time, the BMS battery management system 14 first controls the electromagnetic valve 12 corresponding to the battery compartment 6 to conduct the corresponding adapter pipe 11, and then controls the liquid nitrogen fire extinguishing module 1 to release the liquid nitrogen extinguishing agent. The liquid nitrogen extinguishing agent enters the spray pipe 9 in the corresponding battery compartment 6 through the collecting pipe 3 and the adapter pipe 11 in turn. Under the blockage of the buffer plate 20 and the plug 22, the liquid nitrogen extinguishing agent in the spray pipe 9 first sprays to the two side sub-battery packs 15 through the spray holes 10, so as to cool the upper surfaces of the two sub-battery packs 15, thereby preferentially protecting the automobile parts above the battery chassis, maximizing the protection of the passengers' personal and property safety, and providing passengers with longer escape and accident handling time.

[0055] When the liquid nitrogen extinguishing agent fills the entire upper surface of the battery pack 7, the pressure value in the spray pipe 9 will continue to rise due to the continuous work of the liquid nitrogen fire extinguishing module 1. When the pressure rises to a certain degree, the liquid nitrogen extinguishing agent can flush the plug 22 in the flow guide hole 21 through the groove 23, so that the liquid nitrogen extinguishing agent can enter the through slot 18 of the partition plate 16 through the flow guide hole 21, thereby cooling the gap and bottom between the two battery packs 7, and cutting off the heat source. At the same time, under the continuous impact of the liquid nitrogen extinguishing agent, the plug 22 leaving the flow guide hole 21 can drive the sliding block 24 to descend along the guide rail 26 until it hovers in the middle of the through slot 18 through the locking piece 25, preventing the through slot 18 from deforming due to the extrusion of the partition plate 16 by the heated sub-battery pack 15, thereby avoiding the blockage of the through slot 18. When the liquid nitrogen fire extinguishing module 1 releases the liquid nitrogen extinguishing agent, the excess pressure can be discharged through the pressure relief pipe 5 to avoid damage to the battery compartment 6 due to excessive instantaneous pressure.

Claims

1. A new energy vehicle automatic fire extinguishing processing system coupled with a BMS, comprising a liquid nitrogen fire extinguishing module (1) and a battery module (2), wherein the liquid nitrogen fire extinguishing module (1) and the battery module (2) are connected through a current collecting pipe (3), characterized in that: The battery module (2) comprises a shell (4) and a pressure relief pipe (5) arranged on one side of the shell (4), a plurality of battery compartments (6) are arranged on the shell (4), a battery pack (7) is arranged in each battery compartment (6), an upper opening of the battery compartment (6) is covered by a sealing plate (8), a spraying pipe (9) is arranged above the battery pack (7) on a covering surface of the sealing plate (8), a plurality of spraying holes (10) are distributed on a pipe wall of the spraying pipe (9), two ends of the spraying pipe (9) are connected to opposite side walls in the battery compartment (6) respectively, one end of the spraying pipe (9) is provided with an adapter pipe (11) extending to an outside of the shell (4), the adapter pipes (11) corresponding to each battery compartment (6) are connected in series through a manifold (3), an electromagnetic valve (12) for opening and closing the adapter pipe (11) is arranged on the adapter pipe (11), a temperature sensor (13) for detecting temperature change in the battery compartment (6) to output a temperature detection signal is arranged in the battery compartment (6), a BMS battery management system (14) for receiving the temperature detection signal is coupled to the temperature sensor (13), and a liquid nitrogen fire extinguishing module (1) is coupled to the electromagnetic valve (12) and controlled by the BMS battery management system (14). The spraying pipe (9) has an isosceles trapezoidal cross section and a longer base is arranged upward; the battery pack (7) comprises two horizontally arranged sub-battery packs (15), the spraying pipe (9) is located between the two sub-battery packs (15), a partition plate (16) extends downward from a lower pipe wall of the spraying pipe (9) and is inserted between the two sub-battery packs (15), a lower edge of the partition plate (16) extends below the two sub-battery packs (15), lower partition plates (17) are arranged on both sides of the lower edge of the partition plate (16) and are located below the two sub-battery packs (15) respectively, upper and lower plate surfaces of the lower partition plates (17) are spaced apart from the bottom of the sub-battery pack (15) and the bottom of the battery compartment (6) respectively, both side plate surfaces of the partition plate (16) are spaced apart from the two sub-battery packs (15) respectively, a through groove (18) is formed in the partition plate (16) along the plate surface direction, an upper end of the through groove (18) is communicated with an inner cavity of the spraying pipe (9), a lower end of the through groove (18) is communicated with a space between the lower partition plate (17) and the bottom of the battery compartment (6), and the inner side wall of the through groove (18) and the plate surface of the lower partition plate (17) are both provided with drainage holes (19); a buffer plate (20) is arranged at a joint of the through groove (18) and the spraying pipe (9), a plurality of flow guide holes (21) are distributed on the buffer plate (20) along the length direction of the spraying pipe (9), and a plug (22) is sealingly arranged in each flow guide hole (21); a recess (23) is formed in an upper end surface of the plug (22).

2. The new energy vehicle automatic fire extinguishing processing system coupled with the BMS according to claim 1, characterized in that: The side wall of the battery pack (7) is spaced apart from the side wall of the battery compartment (6).

3. The new energy vehicle automatic fire extinguishing processing system coupled with the BMS according to claim 1, characterized in that: A sliding block (24) is arranged below the flow guide hole (21) and is connected to the plug (22) and can slide in a vertical direction, and a locking member (25) is arranged in the through groove (18) to make the sliding block (24) hover in the middle of the through groove (18).

4. The new energy vehicle automatic fire extinguishing processing system coupled with the BMS according to claim 3, characterized in that: Two opposite side walls of the through slot (18) are provided with vertical guide rails (26) corresponding to the position of the sliding block (24), and the sliding block (24) is provided with a sliding groove (27) on both sides for slidingly clamping the two guide rails (26).

5. The new energy vehicle automatic fire extinguishing processing system coupled with the BMS according to claim 4, characterized in that: The locking member (25) is a protrusion arranged in the middle of the guide rail (26) to support the lower surface of the sliding block (24).

6. A new energy vehicle automatic fire extinguishing processing method coupled with a BMS, adopting the system according to any one of claims 1 to 5, characterized in that: The BMS battery management system (14) is pre-set with a temperature threshold value. When the temperature sensor (13) detects that the temperature value in the corresponding battery compartment (6) is greater than the temperature threshold value, the BMS battery management system (14) first controls the electromagnetic valve (12) corresponding to the battery compartment (6) to conduct the connecting pipe (11), and then controls the liquid nitrogen fire extinguishing module (1) to release the liquid nitrogen extinguishing agent to the collecting pipe (3).

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