Self-rescue device for thermal runaway of new energy automobile

Abstract

The invention discloses a new energy automobile thermal runaway self-rescue device which comprises a battery monitoring unit, an installation part and a battery module, the battery module is detachably installed at the bottom of an automobile through the installation part, a protection box is arranged below the battery module, and a sealing mechanism, a supporting induction plate and a power mechanism are arranged in the protection box. When the battery monitoring unit outputs a thermal runaway signal, the battery module and the bottom of the automobile are disconnected through the installation piece, the battery module falls onto the supporting induction plate, the power mechanism drives the sealing mechanism to be completely unfolded to wrap the battery module, and the battery module is sealed through the sealing mechanism. The air exhaust mechanism exhausts air in the sealing mechanism through an air pipe; according to the new energy automobile thermal runaway self-rescue device, after an abnormal battery module falls into the protection box, the sealing mechanism is unfolded to completely cover and wrap the battery module, the abnormal battery module and an automobile body are isolated, and the air exhaust mechanism can be matched with the sealing mechanism to enable the internal environment of the sealing mechanism to be in a vacuum state.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy vehicles, and in particular to a thermal runaway self-rescue device for new energy vehicles. 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 thermal runaway self-rescue device for new energy vehicles, 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 causes the batteries in the battery module that have not been damaged to be affected and damaged by the abnormal batteries due to failure to take self-rescue measures in time.

[0004] Technical solution:

[0005] A thermal runaway self-rescue device for a new energy vehicle comprises 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 on the bottom of the vehicle, and the protection box is connected to the bottom of the vehicle through a telescopic connection mechanism arranged 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 sensing plate and a power mechanism are provided in the protection box. The support sensing 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. An air pipe is provided on the sealing mechanism, and the air pipe is detachably connected to an exhaust mechanism provided on the car.

[0007] When the battery monitoring unit outputs a thermal runaway signal, the mounting piece 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 the exhaust mechanism extracts the air inside the sealing mechanism through the air pipe, so that the battery module in the sealing mechanism is in a vacuum environment to complete the out-of-control self-rescue operation.

[0008] 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;

[0009] 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.

[0010] 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;

[0011] The connecting plate is detachably connected to the protection box via a connecting piece;

[0012] 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.

[0013] 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;

[0014] 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;

[0015] 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.

[0016] 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;

[0017] 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.

[0018] 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;

[0019] 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.

[0020] 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.

[0021] 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;

[0022] 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;

[0023] 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.

[0024] In a further embodiment, one end of the air pipe is located in one of the folded sealing bags, and the other end sequentially penetrates the fixing seat and the side wall of the protection box and extends into the side groove and is connected to the air extraction mechanism, the side groove is opened at the bottom of the car, the side groove corresponding to one side of the protection box is connected to the installation groove, and the bottom of the side groove faces the ground and is an open structure;

[0025] A non-return member is arranged in the air pipe.

[0026] In a further embodiment, the air extraction mechanism comprises an air extraction pump disposed at the bottom of the vehicle, the air extraction end of the air extraction pump is connected to one end of a telescopic connecting pipe, and the other end of the telescopic connecting pipe is inserted into the air pipe and detachably connected to the air pipe;

[0027] The telescopic connecting pipe comprises a telescopic vertical portion and a telescopic horizontal portion, the top of the telescopic vertical portion is connected to the air extraction end of the air extraction pump, the bottom is vertically connected to one end of the telescopic horizontal portion, and the other end of the telescopic horizontal portion is inserted into the air pipe;

[0028] The telescopic transverse part is connected to the outer sleeve through a driven connecting rod, one end of the driven connecting rod is fixed to the telescopic transverse part, and the other end is slidably connected to the outer sleeve through a connecting rod sliding member;

[0029] The connecting rod sliding member comprises a connecting rod sliding block installed on the driven connecting rod, the connecting rod sliding block slides up and down in the connecting rod sliding groove, and the connecting rod sliding groove is arranged on the outer sleeve.

[0030] Beneficial effects of the present invention:

[0031] (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;

[0032] (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 exhaust mechanism can cooperate with the sealing mechanism to make the internal environment of the sealing mechanism in a vacuum state, timely protecting the battery module, so that the battery module will not have a fire that spreads rapidly without oxygen supply, 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;

[0033] (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

[0034] 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.

[0035] Figure 2 It is a front cross-sectional structural schematic diagram of the battery module of the present invention in an abnormal state.

[0036] Figure 3 The present invention Figure 2 Enlarged structural diagram at A in the middle.

[0037] Figure 4 The present invention Figure 2 Enlarged structural diagram at B in the middle.

[0038] Figure 5 It is a schematic diagram of a local structure of the present invention in a top view and a cross-section.

[0039] Figure 6 The present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0040] Figure 7 It is a schematic diagram of a partial structure viewed from above of the present invention.

[0041] Figure 8 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 follows: battery module 1, chassis 11, mounting groove 111, side groove 112, mounting part 12, explosive bolt 121, protection box 2, support induction plate 21, vent 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, air pipe 6, check part 61, exhaust mechanism 7, exhaust pump 71, connecting rod 8, outer sleeve 81, sleeve sliding part 811, inner sliding rod 82, connecting spring 83, power electric cylinder 9, telescopic connecting pipe 10, driven connecting rod 101, connecting rod sliding part 102. 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 1-8, is a new energy vehicle thermal runaway self-rescue device 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 protection box 2 is longitudinally slidably arranged on the bottom of the vehicle In the installation slot 111 opened at the bottom, 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 new energy vehicle thermal runaway self-rescue device 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 can 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 space between the bottom of the car and the ground is increased, which is beneficial to the driving of the car. 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 sensing plate 21 and a power mechanism 5 are provided in the protection box 2. The support sensing 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 car. 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 operations. The sealing mechanism 4 in the fully expanded state The sealing mechanism 4 is used to seal and wrap the battery module 1. An air pipe 6 is provided on the sealing mechanism 4, and the air pipe 6 is detachably connected to a vacuum mechanism 7 provided on the automobile. 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 automobile, and the battery module 1 falls onto the supporting sensing plate 21 in the protective box 2. The power mechanism 5 drives the sealing mechanism 4 to fully unfold and wrap the battery module 1. The vacuum mechanism 7 extracts the air inside the sealing mechanism 4 through the air pipe 6, so that the battery module 1 in the sealing mechanism 4 is in a vacuum environment to complete 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] One end of the air pipe 6 is located in one of the folding sealing bags 42, and the other end passes through the fixing seat 43 and the side wall of the protection box 2 in sequence, extends into the side groove 112 and is connected to the exhaust mechanism 7. The side groove 112 is opened at the bottom of the car, and the side groove 112 is connected to the installation groove 111 corresponding to one side of the protection box 2. The bottom of the side groove 112 is an open structure facing the ground, such as Figure 7As shown, the side groove 112 is connected to the installation groove 111, so that the air pipe 6 can cooperate with the exhaust mechanism 7, and the open structure at the bottom makes it possible for the air pipe 6 to directly move down from the bottom and disengage from the side groove 112 when the protection box 2 falls. Therefore, when the protection box 2 is separated from the automobile chassis 11, the air pipe 6 can also be separated from the side groove 112, and there will be no connection obstruction between the air pipe 6 and the bottom of the automobile; a non-return member 61 is provided in the air pipe 6, and the non-return member 61 is preferably a non-return valve, so that the exhaust mechanism 7 can complete the extraction of air in the sealing component. After the exhaust mechanism 7 is separated from the air pipe 6, the external air cannot easily enter the sealing component through the air pipe 6. The non-return member 61 can also be a non-return plate hinged on the inside of the air pipe 6 for unidirectional rotation. When the telescopic connecting tube 10 is inserted into the air pipe 6, the non-return plate is driven to rotate and open the air pipe 6, thereby completing the vacuum operation. When the telescopic connecting tube 10 is separated, the non-return plate can rebound and reset to close the air pipe 6.

[0054] The exhaust mechanism 7 includes an exhaust pump 71 arranged at the bottom of the car, the exhaust end of the exhaust pump 71 is connected to one end of the telescopic connecting pipe 10, the other end of the telescopic connecting pipe 10 is inserted into the air pipe 6 and is detachably connected to the air pipe 6; the telescopic connecting pipe 10 includes a telescopic vertical part and a telescopic horizontal part, the top of the telescopic vertical part is connected to the exhaust end of the exhaust pump 71, and the bottom is vertically connected to one end of the telescopic horizontal part, the other end of the telescopic horizontal part is inserted into the air pipe 6, the telescopic vertical part and the telescopic horizontal part are both accordion-type telescopic structures, when the protective box 2 is lowered When the air pipe 6 falls, the air pipe 6 falls with it, and the falling telescopic horizontal part pulls the telescopic vertical part to extend downward to cooperate, so as to maintain the communication between the telescopic connecting pipe 10 and the air pipe 6; the telescopic horizontal part is connected to the outer sleeve 81 through a driven connecting rod 101, one end of the driven connecting rod 101 is fixed to the telescopic horizontal part, and the other end is slidably connected to the outer sleeve 81 through a connecting rod sliding member 102; the connecting rod sliding member 102 includes a connecting rod slider installed on the driven connecting rod 101, and the connecting rod slider slides up and down in the connecting rod sliding groove, and the connecting rod sliding groove is provided on the outer sleeve 81, such as Figure 4 and 7As shown, since the telescopic connecting tube 10 is located between the two outer sleeves 81 on the same side, the driven connecting rod 101 can be designed as an inverted T shape, which can simultaneously connect the telescopic connecting tube 10 and the two outer sleeves 81. This will not only not affect the movement and sliding of the driven connecting rod 101, but also enable the driven connecting rod 101 to be more stably driven by the outer sleeve 81. When the telescopic horizontal portion pulls the telescopic vertical portion downward along with the falling protection box 2 and the air pipe 6, since the position of the outer sleeve 81 remains unchanged, the telescopic horizontal portion cooperates with the driven connecting rod 101 to slide downward through the connecting rod sliding member 102 When the power cylinder 9 drives the outer sleeve 81 to move, the driven connecting rod 101 also cooperates to drive the telescopic transverse part to extend and retract. The outer sleeve 81 moves away from the protection box 2 so that the connecting plate 31 is separated from the protection box 2. At the same time, the driven connecting rod 101 drives the telescopic transverse part to contract, so that the telescopic transverse part is pulled out of the air pipe 6. Therefore, when the protection box 2 is separated from the automobile chassis 11, the air pipe 6 and the telescopic connecting pipe 10 are no longer connected, and the protection box 2 can be completely separated without hindrance. The surface of the protection box 2 is provided with an elastic protective layer to prevent the protection box 2 from being damaged by the impact force when it falls on the ground.

[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 vehicle 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 vacuum pump 71 runs, and the inside of the folding sealing bag 42 is vacuumed through the telescopic connecting tube 10 and the air pipe 6, so that the battery module 1 can quickly extinguish the fire and save itself, and then it can be driven to a safe position, and the power cylinder 9 is opened to separate the protection box 2 from the connecting plate 31, and the air pipe 6 is separated from the telescopic connecting tube 10, so that 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 thermal runaway self-rescue device for 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 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 sensing plate and a power mechanism are provided in the protection box. The support sensing 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. An air pipe is provided on the sealing mechanism, and the air pipe is detachably connected to an exhaust mechanism provided on the car. When the battery monitoring unit outputs a thermal runaway signal, the mounting piece 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 the exhaust mechanism extracts the air inside the sealing mechanism through the air pipe, so that the battery module in the sealing mechanism is in a vacuum environment to complete the out-of-control self-rescue operation.

2. A thermal runaway self-rescue device for new energy vehicles 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 thermal runaway self-rescue device for new energy vehicles 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 thermal runaway self-rescue device for new energy vehicles 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 thermal runaway self-rescue device for new energy vehicles 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 thermal runaway self-rescue device for new energy vehicles 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 thermal runaway self-rescue device for new energy vehicles 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 thermal runaway self-rescue device for new energy vehicles 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 thermal runaway self-rescue device for new energy vehicles according to claim 8, characterized in that: One end of the air pipe is located in one of the folding sealing bags, and the other end passes through the fixing seat and the side wall of the protection box in sequence, extends into the side groove and is connected to the air extraction mechanism, the side groove is opened at the bottom of the car, the side groove corresponds to a side of the protection box and is connected to the installation groove, and the bottom of the side groove faces the ground and is an open structure; A non-return member is arranged in the air pipe.

10. A thermal runaway self-rescue device for new energy vehicles according to claim 5, characterized in that: The air extraction mechanism comprises an air extraction pump disposed at the bottom of the vehicle, the air extraction end of the air extraction pump is connected to one end of a telescopic connecting pipe, and the other end of the telescopic connecting pipe is inserted into the air pipe and detachably connected to the air pipe; The telescopic connecting pipe comprises a telescopic vertical portion and a telescopic horizontal portion, the top of the telescopic vertical portion is connected to the air extraction end of the air extraction pump, the bottom is vertically connected to one end of the telescopic horizontal portion, and the other end of the telescopic horizontal portion is inserted into the air pipe; The telescopic transverse part is connected to the outer sleeve through a driven connecting rod, one end of the driven connecting rod is fixed to the telescopic transverse part, and the other end is slidably connected to the outer sleeve through a connecting rod sliding member; The connecting rod sliding member comprises a connecting rod sliding block installed on the driven connecting rod, the connecting rod sliding block slides up and down in the connecting rod sliding groove, and the connecting rod sliding groove is arranged on the outer sleeve.

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