Self-rescue device for new energy automobile battery thermal runaway

Abstract

The invention discloses a self-rescue device for new energy automobile battery thermal runaway, which comprises a battery monitoring unit, a mounting part and a battery module, a protection box is arranged on the outer side of the lower part of the battery module, the protection box is slidably arranged in a mounting groove formed in the bottom of an automobile, and a sealing mechanism, a support sensing plate and a power mechanism are arranged in the protection box; a self-rescue assembly is arranged in the sealing mechanism and comprises an air storage tank and an exhaust part. According to the self-rescue device for thermal runaway of the battery of the new energy automobile, after an abnormal battery module falls into the protection box, the sealing mechanism is unfolded to completely cover and wrap the battery module, the self-rescue assembly runs immediately, the gas storage tank sprays nitrogen to the battery module through the gas discharging opening in the telescopic gas discharging pipe, the battery module is protected in time, and the service life of the battery module is prolonged. According to the battery module provided by the invention, the situation that fire rapidly spreads is avoided under the condition that the battery module is isolated from the outside, so that normal and intact batteries are prevented from being influenced by abnormal batteries, the batteries which are not abnormal yet are effectively protected, and the practicability is better.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and in particular to a self-rescue device for thermal runaway of a battery of a new energy vehicle. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional automotive fuels as their power source (or use conventional automotive fuels and adopt new on-board power devices), and integrate advanced technologies in vehicle power control and drive to form vehicles with advanced technical principles, new technologies, and new structures. Currently, most new energy vehicles use high-voltage batteries as their power source. New energy vehicles that use batteries as their power source cannot separate the batteries from the vehicle body in time when the batteries are abnormal. This is not only inconvenient for the separated batteries to be placed in a sealed environment for cooling and extinguishing the fire to complete self-rescue operations, but it can also easily cause batteries in the battery module that have not yet been damaged to be affected and damaged by abnormal batteries due to failure to take timely self-rescue measures. Summary of the invention

[0003] Purpose of the invention: To provide a self-rescue device for thermal runaway of new energy vehicle batteries, so as to solve the problem that most new energy vehicles in the prior art that use batteries as power sources cannot promptly detach the batteries from the vehicle body when the batteries are abnormal, which is not only inconvenient for the detached batteries to be placed in a sealed environment for cooling and extinguishing the fire to complete the self-rescue operation, but also easily leads to the problem that the batteries in the battery module that have not been damaged are affected and damaged by the abnormal batteries due to the failure to take self-rescue measures in time.

[0004] Technical solution:

[0005] A self-rescue device for thermal runaway of a battery of a new energy vehicle, comprising a battery monitoring unit, a mounting member and a battery module, wherein the battery module is detachably mounted on the bottom of the vehicle through the mounting member, the mounting member is electrically connected to the battery monitoring unit, the battery monitoring unit is used to monitor the status data of the battery module, and output a thermal runaway signal when the status data indicates that the battery module has a thermal runaway risk, the mounting member disconnects the battery module from the bottom of the vehicle upon obtaining the thermal runaway signal, a protection box is provided on the lower outer side of the battery module, the protection box is slidably arranged in a mounting slot provided in the bottom of the vehicle, and the protection box is connected to the bottom of the vehicle through a telescopic connection mechanism provided on the vehicle;

[0006] The top surface of the protection box is provided with an opening for the battery module to enter, and the bottom surface is provided with a plurality of vents. A sealing mechanism, a support induction plate and a power mechanism are provided in the protection box. The support induction plate is located in the sealing mechanism and is used to support the battery module after being disconnected from the bottom of the car. The power mechanism is used to drive the sealing mechanism to move in the horizontal direction of the battery module to perform a retracting and unfolding operation. The sealing mechanism in a fully unfolded state is used to seal and wrap the battery module;

[0007] A self-rescue assembly is provided in the sealing mechanism, and the self-rescue assembly includes a gas storage tank and an exhaust member, the exhaust member is connected to the gas storage tank for releasing the inert gas in the gas storage tank, and the exhaust member and the power mechanism are electrically connected to the battery monitoring unit respectively;

[0008] When the battery monitoring unit outputs a thermal runaway signal, the mounting component disconnects the battery module from the bottom of the vehicle, and the battery module falls onto the supporting sensing plate in the protective box. The power mechanism drives the sealing mechanism to fully unfold and wrap the battery module, and then the exhaust component inputs the inert gas in the gas tank into the sealing mechanism, so that the battery module is wrapped by the inert gas in a sealed environment and completes the out-of-control self-rescue operation.

[0009] In a further embodiment, the mounting member includes a fracture execution unit and a control unit, the control unit is electrically connected to the battery monitoring unit, and after receiving the thermal runaway signal, the control unit controls the fracture execution unit to disconnect the mounting member, so that the battery module falls off from the bottom of the vehicle;

[0010] The mounting part is an explosive bolt, the fracture execution part is an explosive inside the explosive bolt, the detonation point of the explosive is connected to the control part, and after receiving the thermal runaway signal, the control part provides an electrical signal to the detonation point to detonate the explosive.

[0011] In a further embodiment, the telescopic connection mechanism includes a plurality of connection components, which are symmetrically arranged about the center line of the protection box, and the connection components include a connection plate, a connection rod and a power cylinder, the connection plate is connected to one end of the connection rod facing the ground, the other end of the connection rod is slidably connected to the bottom of the car through a sleeve sliding member, and the power cylinder is arranged at the bottom of the car and connected to the connection rod to drive the connection rod to move horizontally;

[0012] The connecting plate is detachably connected to the protection box via a connecting piece;

[0013] The connecting member comprises an inserting block fixed on the protection box, the inserting block is horizontally inserted into a slot, and the slot is provided in the connecting plate.

[0014] In a further embodiment, the connecting rod comprises an outer sleeve, an inner slide rod and a connecting spring, the connecting spring is arranged in the outer sleeve, the top end of the inner slide rod extends into the outer sleeve and is connected to one end of the connecting spring, the other end of the connecting spring is fixedly connected to the inside of the outer sleeve, the bottom end of the inner slide rod is located outside the outer sleeve and is fixedly connected to the connecting plate, and the inner slide rod is slidably connected to the outer sleeve;

[0015] The outer sleeve is slidably connected to the automobile chassis through the sleeve sliding member, and the power cylinder is connected to the outer sleeve;

[0016] The sleeve sliding member comprises a sleeve sliding block installed on the outer sleeve, the sleeve sliding block cooperates to slide horizontally in a sleeve sliding groove, and the sleeve sliding groove is arranged at the bottom of the automobile.

[0017] In a further embodiment, the connection assembly further comprises a telescopic support rod, one end of the telescopic support rod is hinged on the outer sleeve, and the other end is hinged on the moving block, and the moving block is slidably connected to the connecting plate through a support rod sliding member;

[0018] The support rod sliding member comprises a support rod sliding block installed on the moving block, the support rod sliding block is adapted to slide horizontally in a support rod sliding groove, and the support rod sliding groove is provided on the connecting plate.

[0019] In a further embodiment, the sealing mechanism includes two sealing components symmetrically arranged about the center line of the protection box, the two sealing components are distributed along the horizontal direction of the battery module and symmetrically located on both sides of the battery module, the sealing component includes a moving frame, a folding sealing bag and a fixing seat, the fixing seat is fixed on the inner side wall of the protection box, the fixing seat is connected to the moving frame through the folding sealing bag, the moving frame is connected to the power mechanism, and the power mechanism drives the moving frame to move horizontally outside the battery module to drive the folding sealing bag to perform a folding and unfolding operation;

[0020] One end of the supporting induction plate is fixed on the fixing seat, and the other end passes through the folding sealing bag in the folded state and extends out of the moving frame.

[0021] In a further embodiment, the two movable frames are arranged opposite to each other and connected by a sealing joint, wherein the sealing joint includes a sealing protrusion and a sealing groove for inserting the sealing protrusion, the sealing protrusion is fixed on one of the movable frames, and the sealing groove is opened on the other movable frame.

[0022] In a further embodiment, the power mechanism comprises a power spring and a power member, the power spring is located parallel to the outside of the folding sealing bag, and the two ends of the power spring are fixedly connected to the moving frame and the fixing seat respectively;

[0023] The power member includes an electromagnet and a magnetic block matched with the electromagnet, the electromagnet is arranged in the protection box, and the magnet is arranged on the moving frame;

[0024] Therefore, a guide sliding member is further provided between the moving frame and the protection box. The guide sliding member comprises a guide sliding block installed on the moving frame. The guide sliding block slides horizontally in a guide sliding groove. The guide sliding groove is provided on the inner wall of the protection box.

[0025] In a further embodiment, the gas storage tank is fixed on the supporting induction plate, the exhaust member includes a solenoid valve and a gas exhaust pipe, the solenoid valve is installed on the gas storage tank to control the exhaust of the inert gas in the gas storage tank, one end of the gas exhaust pipe is connected to the gas storage tank through the solenoid valve, and the other end is closed and connected to the movable frame through a fixing rod;

[0026] The gas exhaust pipe comprises a telescopic exhaust pipe, and a plurality of exhaust ports are provided on a side of the telescopic exhaust pipe facing the battery module;

[0027] The telescopic venting pipe is arranged in the sealing assembly along the horizontal direction of the battery module.

[0028] In a further embodiment, a plurality of exhaust holes are opened at the bottom of the movable frame, a check piece is provided in the exhaust holes, and the exhaust holes are communicated with the sealing mechanism.

[0029] Beneficial effects of the present invention:

[0030] (1) By setting a protection box between the chassis and the battery module, the protection box is protected under the battery module, which can effectively prevent the impact of ground conditions on the battery module during driving, and the protection box is supported on the chassis by a connector with an elastic structure. When the battery module is in normal use, the battery module box and the protection box are away from the ground and will not affect the normal driving of the car. When the battery module is disconnected from the chassis and enters the protection box, the protection box slides downward, further driving the battery module away from the chassis, effectively reducing the adverse effects of abnormal battery modules on the car;

[0031] (2) After the abnormal battery module falls into the protection box, the sealing mechanism unfolds to completely cover and wrap the battery module, isolating the abnormal battery module from the vehicle body, and the self-rescue component is immediately operated, and the gas storage tank sprays nitrogen to the battery module through the venting port on the telescopic venting pipe, protecting the battery module in time, so that the battery module will not spread rapidly when it is isolated from the outside, thereby preventing the normal and intact battery from being affected by the abnormal battery, effectively protecting the battery that has not yet shown any abnormality, and having better practicality;

[0032] (3) The telescopic connection mechanism removably connects the protection box to the chassis. After the abnormal battery module is isolated in the protection box, the protection box and the battery module can be completely detached from the vehicle through the telescopic connection mechanism after the vehicle drives to a suitable location. No manual detachment is required, which effectively improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the partial structure of the front section of the battery module of the present invention under normal operating conditions.

[0034] Figure 2 It is a front cross-sectional structural schematic diagram of the battery module of the present invention in an abnormal state.

[0035] Figure 3 The present invention Figure 2 Enlarged structural diagram at A in the middle.

[0036] Figure 4 It is a schematic diagram of the side sectional structure of the sealing component of the present invention.

[0037] Figure 5 It is a schematic diagram of the local structure of the sealing assembly docking of the present invention.

[0038] Figure 6 It is a schematic diagram of a local structure of the present invention in a top view and a cross-section.

[0039] Figure 7 The present invention Figure 5 Enlarged structural diagram at B in the middle.

[0040] Figure 8 It is a schematic diagram of a partial structure viewed from above of the present invention.

[0041] Fig. 9 It is a schematic diagram of the position structure of the protection box and the vehicle body of the present invention.

[0042] The accompanying drawings are marked as: battery module 1, chassis 11, mounting groove 111, mounting part 12, explosive bolt 121, protection box 2, support induction plate 21, vent hole 22, connecting groove 23, connecting part 24, telescopic connecting mechanism 3, connecting plate 31, telescopic support rod 32, support rod sliding part 321, sealing mechanism 4, moving frame 41, sealing docking part 411, guide sliding part 412, folding sealing bag 42, fixing seat 43, power mechanism 5, power spring 51, power part 52, self-rescue component 6, gas storage tank 61, solenoid valve 62, telescopic venting pipe 63, venting port 631, exhaust hole 7, check member 71, connecting rod 8, outer sleeve 81, sleeve sliding part 811, inner sliding rod 82, connecting spring 83, power cylinder 9. DETAILED DESCRIPTION

[0043] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0045] Reference Figure 1-9, is a self-rescue device for thermal runaway of a new energy vehicle battery disclosed in the present invention, comprising a battery monitoring unit, a mounting member 12 and a battery module 1, wherein the battery module 1 is detachably mounted on the bottom of the vehicle through the mounting member 12, the mounting member 12 is electrically connected to the battery monitoring unit, the battery monitoring unit is used to monitor the status data of the battery module 1, and output a thermal runaway signal when the status data indicates that the battery module 1 has a thermal runaway risk, the mounting member 12 disconnects the battery module 1 from the bottom of the vehicle upon obtaining the thermal runaway signal, a protection box 2 is provided on the lower outer side of the battery module 1, and the longitudinal sliding of the protection box 2 is arranged on the In the installation slot 111 opened at the bottom of the car, the protection box 2 is connected to the bottom of the car through the telescopic connection mechanism 3 provided on the car, and the state of the battery module 1 is monitored by the battery monitoring unit. If the new energy vehicle has a spontaneous combustion fire, the battery monitoring unit can automatically detect the risk of thermal runaway and output a thermal runaway signal. The thermal runaway signal can cause the fracture execution part in the mounting part 12 to disconnect the mounting part 12. After disconnection, the battery module 1 is separated from the bottom of the car and falls downward into the protection box 2. Among them, the battery monitoring unit can be a newly added module or directly implemented by a battery management system BMS. In this embodiment, BMS is preferably used as the battery monitoring unit. In current new energy vehicles, the battery module 1 has been configured with a variety of sensors to detect the state of the battery module 1, such as the temperature of the battery cell, the internal pressure of the battery module 1, the power supply current or voltage, etc. The BMS can predict whether the battery module 1 has a risk of thermal runaway through the data detected by the existing sensors. Specifically, in some embodiments, the battery monitoring unit monitors the temperature value, gas concentration value, pressure value and / or supply current value of the power battery pack as status data; when the status data is not within the preset standard range, the battery monitoring unit outputs a thermal runaway signal. The standard range corresponding to each parameter can be pre-stored in the battery monitoring unit. The above-mentioned self-rescue device for thermal runaway of new energy vehicle batteries also includes a battery backup module, which is arranged in the trunk. The output end of the battery backup module is connected to the power supply end of the vehicle accessories and related power components through a backup switch; the trigger end of the backup switch is connected to the on-board controller; the on-board controller triggers the backup switch to turn on after obtaining the thermal runaway signal. The battery backup module can be a 48v battery pack. By setting up the battery backup module, it can continue to provide power to the vehicle accessories and related power components after the battery module 1 is separated from the vehicle body, ensuring its normal operation. In some vehicles, an elastic component (not shown in the figure) is also configured, and the elastic component is arranged between the vehicle suspension and the vehicle body. In some embodiments of the present application, the controlled end of the elastic component can be communicatively connected to the vehicle-mounted controller; after obtaining the thermal runaway signal, the vehicle-mounted controller sends an action signal to the controlled end of the elastic component, so that the elastic component lifts the vehicle body to a preset height, which may be 10-20 cm, etc.The elastic component may be an air spring or an active stabilizer bar equipped for the vehicle. After the air spring or the active stabilizer bar lifts the vehicle body, the distance between the protection box 2 and the bottom of the vehicle can be increased, and the space between the bottom of the vehicle and the ground is increased. When the protection box 2 and the battery module 1 are separated from the vehicle body, the elastic component can lift the vehicle body, which is convenient for adapting to different driving terrains and avoiding the protection box 2 from obstructing the vehicle. The top surface of the protection box 2 is provided with an opening for the battery module 1 to enter, and the bottom surface is provided with a plurality of vents 22. A sealing mechanism 4, a support induction plate 21 and a power mechanism 5 are provided in the protection box 2. The support induction plate 21 is located in the sealing mechanism 4 and is used to support the battery module 1 after being disconnected from the bottom of the vehicle. The power mechanism 5 is used to drive the sealing mechanism 4 to move in the horizontal direction of the battery module 1 for retraction and expansion. The sealing mechanism 4 in the fully expanded state is used to seal and wrap the battery module 1. A self-rescue component 6 is provided in the sealing mechanism 4, and the self-rescue component 6 includes a gas tank 61 and an exhaust component, and the exhaust component is connected to the gas tank 61 for releasing the inert gas in the gas tank 61, and the exhaust component and the power mechanism 5 are electrically connected to the battery monitoring unit respectively; when the battery monitoring unit outputs a thermal runaway signal, the mounting member 12 disconnects the connection between the battery module 1 and the bottom of the car, and the battery module 1 falls onto the support sensing plate 21 in the protection box 2, and the support sensing plate 21 is provided with a sensing device, and the sensing device includes a gravity sensor, which transmits a signal to the power mechanism, and the power mechanism 5 drives the sealing mechanism 4 to fully unfold and wrap the battery module 1, and then the exhaust component inputs the inert gas in the gas tank 61 into the sealing mechanism 4, so that the battery module 1 is wrapped by the inert gas in a sealed environment and completes the out-of-control self-rescue operation.

[0046] The mounting member 12 includes a fracture execution unit and a control unit, the control unit is electrically connected to the battery monitoring unit, and after receiving the thermal runaway signal, the control unit controls the fracture execution unit to disconnect the mounting member 12, so that the battery module 1 falls off from the bottom of the car; the mounting member 12 is an explosive bolt 121, and the fracture execution unit is an explosive inside the explosive bolt 121, and the detonation point of the explosive is connected to the control unit. After receiving the thermal runaway signal, the control unit provides an electrical signal to the detonation point to detonate the explosive, and a mounting member 12 is provided on the side wall of the protective box 2 to facilitate the connection of the battery module 1 box car, the connecting groove 23 is located at the opening position of the protection box 2 and is U-shaped, the connecting groove 23 is connected to the opening, and the connecting groove 23 also makes the protection box 2 and the mounting groove 111 connected. The two sides of the battery module 1 correspond to the connecting groove 23, and the mounting member 12 is located in the connecting groove 23 and connects the battery module 1 and the chassis 11 at the bottom of the car. The setting of the connecting groove 23 will not affect the connection between the battery module 1 located at the upper opening position inside the protection box 2 and the chassis 11 at the bottom of the car, and when the mounting member 12 explodes and disconnects, the setting of the connecting groove 23 can prevent the mounting member 12 from affecting the falling of the protection box 2 and the battery module 1.

[0047] The telescopic connection mechanism 3 includes a plurality of connection components, and the plurality of connection components are symmetrically arranged about the center line of the protection box 2. The connection components include a connection plate 31, a connection rod 8 and a power cylinder 9. The connection plate 31 is connected to one end of the connection rod 8 facing the ground, and the other end of the connection rod 8 is slidably connected to the bottom of the car through a sleeve sliding member 811. The power cylinder 9 is arranged at the bottom of the car and connected to the connection rod 8 to drive the connection rod 8 to move horizontally. The connection plate 31 is detachably connected to the protection box 2 through the connection member 24. When the power cylinders 9 located on both sides of the protection box 2 are in the original state, the connection rod 8 is close to the protection box 2. At this time, the connecting plate 31 is connected to the protection box 2 through the connecting piece 24 and supports the protection box 2 in the installation groove 111, so that the protection box 2 can be covered and protected under the battery module 1; the connecting piece 24 includes an insert block fixed on the protection box 2, and the insert block is horizontally inserted into the slot, and the slot is opened in the connecting plate 31. When the power cylinder 9 drives the connecting rod 8 away from the protection box 2, the connecting plate 31 moves away from the protection box 2 so that the insert block is separated from the slot. After the bottom of the protection box 2 has no supporting force, it can naturally fall out of the installation groove 111. On the contrary, the connecting plate 31 is close so that the insert block is inserted into the slot, and the protection box 2 can be supported by the connecting component in the installation groove 111.

[0048] The connecting rod 8 includes an outer sleeve 81, an inner slide rod 82 and a connecting spring 83, wherein the connecting spring 83 is arranged in the outer sleeve 81, the top end of the inner slide rod 82 extends into the outer sleeve 81 and is connected to one end of the connecting spring 83, the other end of the connecting spring 83 is fixedly connected to the inside of the outer sleeve 81, the bottom end of the inner slide rod 82 is located outside the outer sleeve 81 and is fixedly connected to the connecting plate 31, the inner slide rod 82 is slidably connected to the outer sleeve 81, as the battery module 1 disconnects from the chassis 11 at the bottom of the car and falls onto the supporting induction plate 21, the supporting induction plate 21 is stressed and the protection box 2 is also stressed, at this time, the protection box 2 moves down under the action of pressure and is connected through the connecting plate 3 1 pulls the inner slide bar 82 downward, the connecting spring 83 in the original state is stretched, and the connecting assembly still supports the protection box 2. The inner slide bar 82 slides longitudinally, and the connecting spring 83 cooperates to perform longitudinal expansion and contraction; the outer sleeve 81 is slidably connected with the automobile chassis 11 through the sleeve sliding member 811, and the power electric cylinder 9 is connected to the outer sleeve 81; the sleeve sliding member 811 includes a sleeve slider installed on the outer sleeve 81, and the sleeve slider cooperates to slide horizontally in the sleeve sliding groove, and the sleeve sliding groove is opened at the bottom of the automobile. The power electric cylinder 9 expands and contracts to drive the outer sleeve 81 to move horizontally, and the cooperation of the sleeve slider and the sleeve sliding groove makes the movement of the connecting rod 8 more accurate and stable.

[0049] The connecting assembly also includes a telescopic support rod 32, one end of the telescopic support rod 32 is hinged on the outer sleeve 81, and the other end is hinged on the moving block, and the moving block is slidably connected to the connecting plate 31 through a support rod sliding member 321; the support rod sliding member 321 includes a support rod sliding member installed on the moving block, and the support rod sliding member cooperates to slide horizontally in the support rod sliding groove, and the support rod sliding groove is opened on the connecting plate 31. As the inner sliding rod 82 is extended and retracted, the distance between the connecting plate 31 and the outer sleeve 81 changes, and the telescopic support rod 32 can cooperate with the movement of the connecting plate 31 to extend and retract and rotate. At the same time, the moving block can also slide on the connecting plate 31 as the angle between the telescopic support rod 32 and the outer sleeve 81 changes. The co-ordination setting of the telescopic support rod 32 makes the co-ordination stability of the connecting plate 31 and the connecting rod 8 better.

[0050] The sealing mechanism 4 includes two sealing components symmetrically arranged about the center line of the protection box 2, and the two sealing components are distributed and arranged along the horizontal direction of the battery module 1 and are symmetrically located on both sides of the battery module 1. The sealing component includes a moving frame 41, a folding sealing bag 42 and a fixing seat 43. The fixing seat 43 is fixed on the inner side wall of the protection box 2. The fixing seat 43 is arranged on the side wall of the protection box 2 where the connecting groove 23 is not provided. The fixing seat 43 is connected to the moving frame 41 through the folding sealing bag 42. The moving frame 4 1 is connected to the power mechanism 5, and the power mechanism 5 drives the moving frame 41 to move horizontally outside the battery module 1 to drive the folding sealing bag 42 to perform the folding and unfolding operation. The positions where the folding sealing bag 42 is connected to the fixing seat 43 and the moving frame 41 are all sealed. When the battery module 1 is operating normally, the folding sealing bag 42 is in a completely folded state, and the horizontal distance between the two moving frames 41 is greater than the length of the battery module 1, so that the battery module 1 will not hit the sealing mechanism 4 when it is disconnected and falls, and the folding sealing bag 42 is unfolded under the drive of the power mechanism 5. 2 can cooperate with the fixing seat 43 and the moving frame 41 to wrap and cover the outside of the battery module 1, so that the two sets of sealing components can completely wrap and cover the battery module 1 after they are fully unfolded, and the two sets of sealing components are located on both sides of the battery module 1, and can move from both sides to the center at the same time when the power mechanism 5 is running, so as to quickly complete the covering operation of the battery module 1; one end of the supporting induction plate 21 is fixed on the fixing seat 43, and the other end passes through the folded sealing bag 42 and extends out of the moving frame 41, and the folded sealing bag 42 in the folded state is in the folded state. The sealing bag 42 allows the partially extended support sensing plate 21 to correspond to the bottom of the battery module 1, so the falling battery module 1 can also fall on the support sensing plate 21 without colliding with the sealing mechanism 4. The support sensing plate 21 includes a support plate and a sensing member arranged on the support plate. The sensing member and the power mechanism are both electrically connected to the vehicle-mounted controller. The sensing member includes a gravity sensor. When the battery module 1 falls onto the support plate, the gravity sensor transmits a sensing signal to the vehicle-mounted controller, and then the vehicle-mounted controller outputs a control signal to the power mechanism 5, so that the electromagnet is powered off to drive the sealing assembly to unfold.

[0051] The two movable frames 41 are arranged opposite to each other, and the two movable frames 41 are connected by a sealing docking piece 411. The sealing docking piece 411 includes a sealing protrusion and a sealing groove for inserting the sealing protrusion. The sealing protrusion is fixed on one of the movable frames 41, and the sealing groove is opened on the other movable frame 41. When the two movable frames 41 are relatively close to be fully fitted, the sealing protrusion is inserted into the sealing groove, and the two movable frames 41 can be tightly fitted, so that the battery module 1 is in a completely sealed environment, which is conducive to the subsequent vacuum operation. A sealing glue layer is also provided between the sealing protrusion and the sealing groove.

[0052] The power mechanism 5 includes a power spring 51 and a power piece 52. The power spring 51 is located parallel to the outside of the folding sealing bag 42. The two ends of the power spring 51 are fixedly connected to the moving frame 41 and the fixed seat 43 respectively; the power piece 52 includes an electromagnet and a magnetic block matched with the electromagnet. The electromagnet is arranged in the protection box 2, and the magnet is arranged on the moving frame 41. The electromagnet is located close to the fixed seat 43. When the electromagnet is energized, it attracts the magnetic block. At this time, the power spring 51 is compressed, and the folding sealing bag 42 is in a completely folded state. The distance between the moving frame 41 and the fixed seat 43 is the smallest. When the battery module 1 falls onto the supporting induction plate 21, the electromagnet is powered off, and the moving frame 41 moves rapidly to the center position of the protection box 2 under the rebound force of the power spring 51 until the two moving frames 41 are tightly fitted, and the two sealing components completely wrap the battery module 1. The magnetic blocks on the two moving frames 41 are opposite magnetic blocks, which are located on both sides of the inside of the protection box 2 The current directions of the electromagnetic coils are opposite. When the two moving frames 41 are close to each other under the action of the popped-up power spring 51, the magnetic blocks of opposite polarities also attract each other, making the connection between the two fitted moving frames 41 tighter and firmer, and the electromagnets with opposite current directions can also cooperate to adsorb the magnetic blocks at corresponding positions; so a guide sliding member 412 is also provided between the moving frame 41 and the protective box 2, and the guide sliding member 412 includes a guide sliding member installed on the moving frame 41, and the guide sliding member cooperates to slide horizontally in the guide sliding groove, and the guide sliding groove is provided on the inner wall of the protective box 2, and the sliding direction and sliding range of the guide sliding member are consistent with the telescopic direction and telescopic range of the power spring 51. This arrangement enables the moving frame 41 to move under the drive of the power spring 51, and the moving frame 41 can also slide in cooperation with the protective box 2 through the guide sliding member 412, thereby improving the movement stability of the moving frame 41, and thereby enabling the folding sealing bag 42 to accurately wrap the battery module 1.

[0053] The gas tank 61 is fixed on the support induction plate 21, and the gas tank 61 is arranged on the support plate. The exhaust component includes a solenoid valve 62 and a gas exhaust pipe. The solenoid valve 62 is installed on the gas tank 61 to control the exhaust of the inert gas in the gas tank 61. One end of the gas exhaust pipe is connected to the gas tank 61 through the solenoid valve 62, and the other end is closed and connected to the moving frame 41 through a fixed rod; the gas exhaust pipe includes a telescopic exhaust pipe 63, and a plurality of exhaust ports 631 are opened on the side of the telescopic exhaust pipe 63 facing the battery module 1; the telescopic exhaust pipe 63 is The sealing component is arranged in the horizontal direction of the battery module 1. When the battery module 1 is disconnected from the chassis 11 at the bottom of the car and falls on the supporting induction plate 21, the moving frame 41 moves to drive the folding sealing bag 42 to unfold, and the moving frame 41 also pulls the telescopic venting tube 63 to unfold and extend horizontally until the battery module 1 is completely covered by the sealing component, and the telescopic venting tube 63 is also fully stretched and unfolded in parallel above the battery module 1. Then the solenoid valve 62 is opened, and the inert gas enters the telescopic venting tube 63 and is sprayed toward the battery module 1 through the venting port 631, which directly and quickly affects the battery module 1.

[0054] A plurality of exhaust holes 7 are provided at the bottom of the movable frame 41, and a check valve 71 is provided in the exhaust hole 7. The exhaust hole 7 is connected with the sealing mechanism 4. When the sealing mechanism 4 is unfolded to wrap the battery module 1, the vent 631 releases the inert gas and the air originally existing in the sealing mechanism 4 can be discharged to the outside through the exhaust hole 7. Therefore, the check valve 71 is preferably a check valve, so that after the air in the fully unfolded sealing component is discharged through the exhaust hole 7, the external gas can no longer enter the sealing component through the exhaust hole 7 to affect the battery module 1.

[0055] The implementation principle of the present invention is: when the mounting part 12 obtains the thermal runaway signal output by the battery monitoring unit, the mounting part 12 disconnects the battery module 1 and the automobile chassis 11, the battery module 1 falls on the supporting induction plate 21, the electromagnet is powered off, the power spring 51 stretches and pops open the folding sealing bag 42, the two folding sealing bags 42 cooperate to completely cover and wrap the battery module 1, the solenoid valve 62 is opened, and nitrogen is input from the gas tank 61 into the telescopic venting pipe 63 and sprayed to the battery module 1 through a plurality of venting ports 631, so that the battery module 1 can quickly extinguish the fire and save itself, and then it can be driven to a safe position, the power cylinder 9 is opened, so that the protection box 2 is separated from the connecting plate 31, and the air pipe is separated from the telescopic exhaust pipe, and the protection box 2 can be separated from the car while carrying the battery module 1.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0057] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A self-rescue device for thermal runaway of a new energy vehicle battery, comprising a battery monitoring unit, a mounting member and a battery module, wherein the battery module is detachably mounted on the bottom of the vehicle through the mounting member, the mounting member is electrically connected to the battery monitoring unit, the battery monitoring unit is used to monitor the status data of the battery module, and output a thermal runaway signal when the status data indicates that the battery module has a thermal runaway risk, the mounting member disconnects the battery module from the bottom of the vehicle when it obtains the thermal runaway signal, and is characterized in that: A protection box is provided on the lower outer side of the battery module, and the protection box is slidably arranged in a mounting slot provided on the bottom of the vehicle, and the protection box is connected to the bottom of the vehicle through a telescopic connection mechanism provided on the vehicle; The top surface of the protection box is provided with an opening for the battery module to enter, and the bottom surface is provided with a plurality of vents. A sealing mechanism, a support induction plate and a power mechanism are provided in the protection box. The support induction plate is located in the sealing mechanism and is used to support the battery module after being disconnected from the bottom of the car. The power mechanism is used to drive the sealing mechanism to move in the horizontal direction of the battery module to perform a retracting and unfolding operation. The sealing mechanism in a fully unfolded state is used to seal and wrap the battery module; A self-rescue assembly is provided in the sealing mechanism, and the self-rescue assembly includes a gas storage tank and an exhaust member, the exhaust member is connected to the gas storage tank for releasing the inert gas in the gas storage tank, and the exhaust member and the power mechanism are electrically connected to the battery monitoring unit respectively; When the battery monitoring unit outputs a thermal runaway signal, the mounting component disconnects the battery module from the bottom of the vehicle, and the battery module falls onto the supporting sensing plate in the protective box. The power mechanism drives the sealing mechanism to fully unfold and wrap the battery module, and then the exhaust component inputs the inert gas in the gas tank into the sealing mechanism, so that the battery module is wrapped by the inert gas in a sealed environment and completes the out-of-control self-rescue operation.

2. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 1, characterized in that: The mounting member includes a fracture execution unit and a control unit, wherein the control unit is electrically connected to the battery monitoring unit, and after receiving the thermal runaway signal, the control unit controls the fracture execution unit to disconnect the mounting member, so that the battery module falls off from the bottom of the vehicle; The mounting part is an explosive bolt, the fracture execution part is an explosive inside the explosive bolt, the detonation point of the explosive is connected to the control part, and after receiving the thermal runaway signal, the control part provides an electrical signal to the detonation point to detonate the explosive.

3. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 1, characterized in that: The telescopic connection mechanism includes a plurality of connection components, which are symmetrically arranged about the center line of the protection box. The connection components include a connection plate, a connection rod and a power cylinder. The connection plate is connected to one end of the connection rod facing the ground, and the other end of the connection rod is slidably connected to the bottom of the car through a sleeve sliding member. The power cylinder is arranged at the bottom of the car and connected to the connection rod to drive the connection rod to move horizontally. The connecting plate is detachably connected to the protection box via a connecting piece; The connecting member comprises an inserting block fixed on the protection box, the inserting block is horizontally inserted into a slot, and the slot is provided in the connecting plate.

4. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 3, characterized in that: The connecting rod comprises an outer sleeve, an inner slide rod and a connecting spring, wherein the connecting spring is arranged in the outer sleeve, the top end of the inner slide rod extends into the outer sleeve and is connected to one end of the connecting spring, the other end of the connecting spring is fixedly connected to the inside of the outer sleeve, the bottom end of the inner slide rod is located outside the outer sleeve and is fixedly connected to the connecting plate, and the inner slide rod is slidably connected to the outer sleeve; The outer sleeve is slidably connected to the automobile chassis through the sleeve sliding member, and the power cylinder is connected to the outer sleeve; The sleeve sliding member comprises a sleeve sliding block installed on the outer sleeve, the sleeve sliding block cooperates to slide horizontally in a sleeve sliding groove, and the sleeve sliding groove is arranged at the bottom of the automobile.

5. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 4, characterized in that: The connecting assembly further comprises a telescopic support rod, one end of which is hinged on the outer sleeve, and the other end of which is hinged on the moving block, and the moving block is slidably connected to the connecting plate via a support rod sliding member; The support rod sliding member comprises a support rod sliding block installed on the moving block, the support rod sliding block is adapted to slide horizontally in a support rod sliding groove, and the support rod sliding groove is provided on the connecting plate.

6. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 1, characterized in that: The sealing mechanism includes two sealing components symmetrically arranged about the center line of the protection box, the two sealing components are distributed along the horizontal direction of the battery module and symmetrically located on both sides of the battery module, the sealing component includes a moving frame, a folding sealing bag and a fixing seat, the fixing seat is fixed on the inner side wall of the protection box, the fixing seat is connected to the moving frame through the folding sealing bag, the moving frame is connected to the power mechanism, and the power mechanism drives the moving frame to move horizontally outside the battery module to drive the folding sealing bag to perform the folding and unfolding operation; One end of the supporting induction plate is fixed on the fixing seat, and the other end passes through the folding sealing bag in the folded state and extends out of the moving frame.

7. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 6, characterized in that: The two moving frames are arranged opposite to each other and connected by a sealing joint. The sealing joint includes a sealing protrusion and a sealing groove for inserting the sealing protrusion. The sealing protrusion is fixed on one of the moving frames, and the sealing groove is opened on the other moving frame.

8. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 7, characterized in that: The power mechanism comprises a power spring and a power member, wherein the power spring is parallelly located outside the folding sealing bag, and two ends of the power spring are fixedly connected to the moving frame and the fixing seat respectively; The power member includes an electromagnet and a magnetic block matched with the electromagnet, the electromagnet is arranged in the protection box, and the magnet is arranged on the moving frame; Therefore, a guide sliding member is further provided between the moving frame and the protection box. The guide sliding member comprises a guide sliding block installed on the moving frame. The guide sliding block slides horizontally in a guide sliding groove. The guide sliding groove is provided on the inner wall of the protection box.

9. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 8, characterized in that: The gas storage tank is fixed on the supporting induction plate, and the exhaust component includes a solenoid valve and a gas exhaust pipe. The solenoid valve is installed on the gas storage tank to control the exhaust of the inert gas in the gas storage tank. One end of the gas exhaust pipe is connected to the gas storage tank through the solenoid valve, and the other end is closed and connected to the moving frame through a fixing rod. The gas exhaust pipe comprises a telescopic exhaust pipe, and a plurality of exhaust ports are provided on a side of the telescopic exhaust pipe facing the battery module; The telescopic venting pipe is arranged in the sealing assembly along the horizontal direction of the battery module.

10. A self-rescue device for thermal runaway of new energy vehicle batteries according to claim 9, characterized in that: A plurality of exhaust holes are provided at the bottom of the movable frame, a non-return member is provided in the exhaust holes, and the exhaust holes are communicated with the sealing mechanism.

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