Battery device with disengagement protection function for new energy automobile

Abstract

The invention discloses a new energy automobile battery device with a disengagement protection function, the new energy automobile battery device comprises a battery monitoring unit, a mounting part, a battery module and a protection box, a sliding support mechanism, a folding opening and closing mechanism, a self-rescue assembly and a transmission trigger mechanism are arranged in the protection box, and the folding opening and closing mechanism is connected with a first trigger part through a first transmission mechanism; the self-rescue assembly is connected with the second triggering piece through the second transmission mechanism, when the sliding supporting mechanism slides to the preset position, force is applied to the transmission triggering mechanism, and the transmission triggering mechanism disconnects the first triggering piece and the first transmission mechanism and disconnects the second triggering piece and the second transmission mechanism at the same time. According to the new energy automobile battery device with the protection separation function, opening of the folding opening and closing mechanism and the self-rescue assembly does not need to be triggered by an electric signal, power does not need to be provided by electric power either, and through the structural design of mechanical transmission and the like, the requirements of building a sealed environment in the protection box and releasing inert gas for self rescue of the battery module are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and in particular to a battery device for new energy vehicles with a disconnection protection function. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional vehicle fuels as a power source (or use conventional vehicle fuels and adopt new vehicle power devices), integrate advanced technologies in vehicle power control and drive, and form vehicles with advanced technical principles, new technologies, and new structures. At present, most new energy vehicles use high-voltage batteries as power sources. When a new energy vehicle that uses a battery as a power source detects that the battery is abnormally out of control, the battery will be separated from the vehicle and fall into a protective device. After receiving the signal, the sealed self-rescue device set inside the protective device starts the relevant power components so that the battery can complete the self-rescue operation in the sealed environment inside the protective device. However, since the sealed self-rescue device in the battery protection device of a general new energy vehicle needs to be triggered by an electrical signal and electricity as a trigger condition and power source, if an abnormal battery or other factors have an adverse effect on the electrical signal or electricity, it is easy for the sealed self-rescue device to receive and transmit the signal in time or the electricity cannot be transmitted and used, which will further cause the protection device to fail to reach the sealing condition in time, and the sealed self-rescue device inside it cannot be opened in time for self-rescue operation, so the stability of the abnormal battery out-of-control self-rescue operation completed by the electrical signal and power setting is slightly lacking. Summary of the invention

[0003] Purpose of the invention: To provide a battery device for new energy vehicles with a breakaway protection function, so as to solve the problem that the sealed self-rescue device arranged inside the protection device for the battery module in the prior art is slightly lacking in stability in completing the out-of-control self-rescue operation of the abnormal battery through electrical signals and power settings.

[0004] Technical solution:

[0005] A battery device for a new energy vehicle with a detachment protection function comprises a battery monitoring unit, a mounting piece, a battery module and a protection box, wherein the battery module is detachably mounted on the bottom of the vehicle through the mounting piece, a protection box is arranged on the lower outer side of the battery module, and the protection box is arranged in a mounting slot opened in the bottom of the vehicle, the mounting piece 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 piece disconnects the battery module from the bottom of the vehicle upon obtaining the thermal runaway signal, the protection box is connected to the bottom of the vehicle through a telescopic connection mechanism arranged on the vehicle, the top surface of the protection box is provided with an opening for the battery module to enter, and a sliding support mechanism, a folding An opening and closing mechanism, a self-rescue assembly and a transmission trigger mechanism, wherein the sliding support mechanism is located below the battery module and is used to support the battery module that is disconnected from the bottom of the car, the folding opening and closing mechanism is located above the sliding support mechanism and is connected to the first trigger member through a first transmission mechanism, the self-rescue assembly is located below the folding opening and closing mechanism and is connected to the second trigger member through a second transmission mechanism, the first trigger member and the second trigger member are both arranged in the protection box and are arranged corresponding to the transmission trigger mechanism, the transmission trigger mechanism is arranged below the sliding support mechanism, and when the sliding support mechanism slides vertically downward to a preset position, a force is applied to the transmission trigger mechanism, so that the transmission trigger mechanism simultaneously disconnects the first trigger member from the first transmission mechanism and the second trigger member from the second transmission mechanism;

[0006] The first transmission mechanism includes a first connecting rope, one end of which is connected to the folding and opening mechanism, and the other end is connected to the first trigger member. The second transmission mechanism includes a second connecting rope, one end of which is connected to the self-rescue component, and the other end is connected to the second trigger member. When the battery monitoring unit outputs a thermal runaway signal, the mounting member disconnects the battery module from the bottom of the car, and the battery module falls onto the sliding support mechanism. When the sliding support mechanism drives the battery module to slide and fall to a preset position in the protection box, the sliding support mechanism applies force to the transmission trigger mechanism, and the transmission trigger mechanism cuts off the connection between the first connecting rope and the first trigger member. The folding and opening mechanism moves and unfolds along the horizontal direction of the battery module to completely cover the top of the battery module. The transmission trigger mechanism simultaneously cuts off the connection between the second connecting rope and the second trigger member. The gas tank in the self-rescue component releases inert gas, so that the battery module is wrapped by the inert gas in the sealed environment formed by the folding and opening mechanism and the protection box to complete the out-of-control self-rescue operation.

[0007] 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;

[0008] 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.

[0009] In a further embodiment, the sliding support mechanism comprises a support seat and a support spring, the support seat is connected to the inner lower portion of the protection box via the support spring, and the support seat is slidably connected to the side wall of the protection box via a support sliding member;

[0010] The supporting sliding member includes a supporting sliding block installed on the supporting seat, and the supporting sliding block slides up and down in a supporting sliding groove opened on the inner wall of the protection box. The sliding direction and sliding range of the supporting sliding block are consistent with the extension direction and extension range of the supporting spring.

[0011] In a further embodiment, the folding and opening mechanism includes two sealing members symmetrically arranged on both sides of the battery module, the sealing member includes an adsorption seat, a retractable member and a retractable spring, one end of the retractable member is fixed to the side wall of the protective box, and the other end is fixedly connected to the adsorption seat, the retractable spring is connected between the adsorption seat and the side wall of the protective box, and the adsorption seat is connected to one end of the first connecting rope.

[0012] In a further embodiment, the two sides of the storage and deployment member that are not connected to the protection box and the adsorption seat are located in a side sealing mechanism, and the side sealing mechanism includes a side seat, and the side seat is fixed to the side wall of the protection box, and a "["-shaped sliding groove is opened in the side seat, and a sliding guide is provided in the sliding groove, and the storage and deployment member is connected to the sliding guide;

[0013] The sliding guide member comprises a guide rod fixed in the sliding groove, the guide rod passes through a guide hole and is connected to the retracting and extending member, a plurality of guide holes are provided on the retracting and extending member at equal intervals along the retracting and extending direction of the retracting and extending member, and the guide rod passes through adjacent guide holes in an alternating manner and is slidably connected to the retracting and extending member;

[0014] The adsorption seat is slidably connected to the side seat via a guide slide, and the guide slide comprises a guide slider installed on the adsorption seat, and the guide slider slides horizontally in a guide slide groove provided on the side seat.

[0015] In a further embodiment, an elastic clamping assembly is further provided in the sliding groove, and the elastic clamping assembly is located on the upper side of the stowage and expansion piece. The elastic clamping assembly includes a clamping strip and an elastic connecting piece, and the elastic connecting piece connects the clamping strip and the sliding groove, and a side of the clamping strip that is not connected to the elastic connecting piece corresponds to the stowage and expansion piece.

[0016] In a further embodiment, the self-rescue assembly further comprises an exhaust pipe, the exhaust pipe being connected to the gas storage tank for releasing the inert gas in the gas storage tank, and a rotating handle being provided on the exhaust pipe for opening and closing the exhaust pipe;

[0017] A rotation spring is connected between the rotating handle and the gas storage tank.

[0018] In a further embodiment, the first transmission mechanism further comprises a plurality of first guide rollers, the first connection rope is wound around the first guide rollers, and the first guide rollers are rotatably disposed in the protection box;

[0019] The second transmission mechanism also includes a plurality of second guide rollers, the second connecting rope is wound around the second guide rollers, the second guide rollers are rotatably arranged on the mounting plate, and the mounting plate is fixed on the body of the gas storage tank.

[0020] In a further embodiment, the transmission trigger mechanism comprises a trigger plate, a blade and a linkage trigger member, the trigger plate is rotatably arranged below the bottom of the protection box through a connecting shaft, the blade is arranged on a surface of the trigger plate facing the linkage trigger member, and the linkage trigger member comprises a transverse axis and the first trigger member and the second trigger member arranged on the transverse axis;

[0021] The horizontal axis is fixedly arranged at the bottom of the protection box, the first trigger member includes a first trigger roller, the second trigger member includes a second trigger roller, the first trigger roller and the second trigger roller are sleeved and fixed on the horizontal axis, the other end of the first connecting rope is wound and fixed on the first trigger roller, and the other end of the second connecting rope is wound and fixed on the second trigger roller;

[0022] A "U"-shaped trigger groove is provided on the first trigger roller and the second trigger roller, and the trigger groove corresponds to the blade for the blade to be inserted into; so that the rotating handle can be opened while the retractable and unfolding piece is unfolded, and the setting of the trigger groove enables the blade to better complete the cutting operation of the connecting rope.

[0023] In a further embodiment, a plurality of exhaust holes are provided on the bottom surface of the protection box, and a check piece is provided in the exhaust holes, so that the air in the protection box can be discharged when the inert gas is discharged.

[0024] The beneficial effects of the present invention are as follows: by arranging a protection box between the chassis and the battery module, the protection box is protected under the battery module, which can effectively avoid the influence of ground conditions on the battery module during driving. After the abnormal battery module falls into the protection box, the sliding support mechanism applies force to the transmission trigger mechanism as the battery module goes deeper into the protection box, so that the transmission trigger mechanism disconnects the restriction of the first transmission mechanism on the folding and opening mechanism, so that the adsorption seat drives the storage and expansion part to quickly expand and completely close the top of the battery module. The battery module can be in a sealed environment in the protection box under the action of the storage and expansion part, and the transmission trigger mechanism disconnects the restriction of the first transmission mechanism on the folding and opening mechanism, and also disconnects the restriction of the second transmission mechanism on the self-rescue component. The handle included in the self-rescue component is turned to open the exhaust pipe, so that the inert gas in the gas tank can be released in the protection box and sprayed toward the battery module, thereby timely protecting the battery module, so that the battery module will not spread rapidly due to fire when isolated from the outside, thereby preventing normal and intact batteries from being affected by abnormal batteries, effectively protecting batteries that have not yet shown abnormalities, and having better practicality. The unfolding of the folding and closing mechanism and the opening of the self-rescue component do not require the same electrical signal to trigger, nor do they require electricity to provide power. Through structural designs such as mechanical transmission, it meets the needs of building a sealed environment in the protection box and releasing inert gas to self-rescue the battery module, and can effectively avoid the adverse effects of electrical signal and power instability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front cross-sectional structural schematic diagram of the battery module of the present invention connected to a car.

[0026] Figure 2 It is a side sectional structural schematic diagram of the protection box of the present invention.

[0027] Figure 3 The present invention Figure 1 Enlarged structural diagram at A in the middle.

[0028] Figure 4 The present invention Figure 2 Enlarged structural diagram at B in the middle.

[0029] Figure 5 It is a side partial structural schematic diagram of the linkage trigger member and the connecting rope of the present invention.

[0030] Figure 6 It is a cross-sectional structural schematic diagram of the storage and expansion member of the present invention being fully expanded in the side seat.

[0031] Figure 7 It is a schematic diagram of a partial structure viewed from above of the present invention.

[0032] Figure 8It is a schematic diagram of a partial structure viewed from above of the present invention.

[0033] Fig. 9 It is a schematic diagram of the position structure of the protection box and the vehicle body of the present invention.

[0034] The accompanying drawings are marked as follows: battery module 1, chassis 11, mounting groove 111, telescopic connection mechanism 12, mounting member 13, explosive bolt 131, protection box 2, exhaust hole 21, anti-return member 211, sliding support mechanism 3, support seat 31, support sliding member 311, support spring 32, folding and opening mechanism 4, adsorption seat 41, guide sliding member 411, retracting and unfolding member 42, sliding guide member 43, guide rod 431, guide hole 432, retracting and unfolding spring 44, self-rescue component 5, gas storage tank 51, exhaust pipe 52, rotating handle 53 , rotating spring 531, first transmission mechanism 6, first connecting rope 61, first guide roller 62, second transmission mechanism 7, second connecting rope 71, second guide roller 72, mounting plate 721, transmission trigger mechanism 8, trigger plate 81, blade 82, connecting shaft 83, linkage trigger member 84, horizontal shaft 841, first trigger roller 842, second trigger roller 843, trigger groove 844, side sealing mechanism 9, side seat 91, sliding groove 911, elastic clamping assembly 92, clamping rubber strip 921, elastic connecting member 922. DETAILED DESCRIPTION

[0035] 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.

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] Reference Figure 1-9, is a battery device for new energy vehicles with a detachment protection function disclosed in the present invention, comprising a battery monitoring unit, a mounting member 13, a battery module 1 and a protection box 2, wherein the battery module 1 is detachably mounted on the bottom of the vehicle through the mounting member 13, a protection box 2 is provided on the lower outer side of the battery module 1, the protection box 2 is arranged in a mounting groove 111 opened at the bottom of the vehicle, the protection box 2 is slidably connected to the mounting groove 111, the mounting member 13 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 13 obtains the thermal runaway signal to disconnect the battery module 1 from the bottom of the vehicle, the protection box 2 is connected to the bottom of the vehicle through a telescopic connection mechanism 12 arranged on the vehicle, the top surface of the protection box 2 is provided with an opening for the battery module 1 to enter, and the protection A sliding support mechanism 3, a folding and opening and closing mechanism 4, a self-rescue component 5 and a transmission trigger mechanism 8 are provided in the box 2. The sliding support mechanism 3 is located below the battery module 1 and is used to support the battery module 1 that is disconnected from the bottom of the car. The folding and opening and closing mechanism 4 is located above the sliding support mechanism 3 and is connected to the first trigger member through a first transmission mechanism 6. The self-rescue component 5 is located below the folding and opening and closing mechanism 4 and is connected to the second trigger member through a second transmission mechanism 7. The first trigger member and the second trigger member are both arranged in the protection box 2 and are arranged corresponding to the transmission trigger mechanism 8. The transmission trigger mechanism 8 is arranged below the sliding support mechanism 3. When the sliding support mechanism 3 slides vertically downward to a preset position, a force is applied to the transmission trigger mechanism 8, so that the transmission trigger mechanism 8 simultaneously disconnects the connection between the first trigger member and the first transmission mechanism 6 and the connection between the second trigger member and the second transmission mechanism 7;The first transmission mechanism 6 includes a first connecting rope 61, one end of which is connected to the folding and opening mechanism 4, and the other end is connected to the first trigger member. The second transmission mechanism 7 includes a second connecting rope 71, one end of which is connected to the self-rescue component 5, and the other end is connected to the second trigger member. When the battery monitoring unit outputs a thermal runaway signal, the mounting member 13 disconnects the battery module 1 from the bottom of the car, and the battery module 1 falls onto the sliding support mechanism 3. When the sliding support mechanism 3 drives the battery module 1 to slide and fall to a preset position in the protection box 2, the sliding support mechanism 3 applies force to the transmission trigger mechanism 8, and the transmission trigger mechanism 8 cuts off the connection between the first connecting rope 61 and the first trigger member, and the folding and opening mechanism 4 moves in the horizontal direction of the battery module 1 and unfolds to completely cover the battery module 1. The transmission trigger mechanism 8 simultaneously cuts off the connection between the second connecting rope 71 and the second trigger member, and the gas tank 51 in the self-rescue component 5 releases the inert gas, so that the battery module 1 is wrapped by the inert gas in the sealed environment composed of the folding and opening mechanism 4 and the protective box 2, thereby completing the out-of-control self-rescue operation, and the status of the battery module 1 is monitored by the battery monitoring unit. If the new energy vehicle spontaneously combusts and catches 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 member 13 to disconnect the mounting member 13. After disconnection, the battery module 1 detaches from the bottom of the vehicle and falls downward into the protective box 2. Among them, the battery monitoring unit can be either 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 is already equipped with a variety of sensors to detect the status of the battery module 1, such as the battery cell temperature, 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 power 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, and 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 via a backup switch; the trigger end of the backup switch is connected to the vehicle controller;After the on-board controller obtains the thermal runaway signal, the backup switch is triggered to turn on. The battery backup module can be a 48v battery pack. By setting up the battery backup module, after the battery module 1 is separated from the vehicle body, it can continue to provide power to the vehicle accessories and related power components to ensure their 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 connected to the on-board controller for communication; after the on-board controller obtains the thermal runaway signal, it 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 can be 10-20cm, etc. The elastic component can be an air spring or an active stabilizer bar equipped with the vehicle. After the air spring or the active stabilizer bar lifts the vehicle body, it can increase the distance between the protection box 2 and the bottom of the car, and increase the space between the bottom of the car and the ground. 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 hindering the car. ;

[0038] The mounting member 13 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 13, so that the battery module 1 falls off from the bottom of the vehicle; the mounting member 13 is an explosive bolt 131, and the fracture execution unit is an explosive inside the explosive bolt 131, 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 convenient opening is provided on the side wall of the protection box 2. The connecting groove connects the battery module 1 and the car on the mounting member 13. The connecting groove is located on the side of the opening of the protection box 2 and is U-shaped. The connecting groove connects the opening, and the connecting groove also connects the protection box 2 and the mounting groove 111. The two sides of the battery module 1 correspond to the connecting groove. The mounting member 13 is located in the connecting groove and connects the battery module 1 and the bottom of the car. The setting of the connecting groove will not affect the connection between the battery module 1 located at the upper opening position inside the protection box 2 and the bottom of the car, and when the mounting member 13 explodes and disconnects, the setting of the connecting groove can prevent the mounting member 13 from affecting the falling of the protection box 2 and the battery module 1.

[0039] The sliding support mechanism 3 includes a support seat 31 and a support spring 32. The support seat 31 is connected to the inner lower part of the protection box 2 through the support spring 32, and the support seat 31 is slidably connected to the side wall of the protection box 2 through a support sliding member 311; the support sliding member 311 includes a support sliding block installed on the support seat 31, and the support sliding block slides up and down in a support sliding groove opened on the inner wall of the protection box 2. The sliding direction and sliding range of the support sliding block are consistent with the extension and contraction direction and extension and contraction range of the support spring 32. The battery module 1 is disconnected and falls downward onto the support seat 31. The support seat 31 is forced to slide downward along the height direction of the protection box 2 and compress the support spring 32, so that the support seat 31 can apply force to the transmission trigger mechanism 8 at a preset position.

[0040] The folding and opening mechanism 4 includes two sealing members symmetrically arranged on both sides of the battery module 1, and the sealing member includes an adsorption seat 41, a retracting and unfolding member 42 and a retracting and unfolding spring 44. One end of the retracting and unfolding member 42 is fixed to the side wall of the protection box 2, and the other end is fixedly connected to the adsorption seat 41. The retracting and unfolding spring 44 is connected between the adsorption seat 41 and the side wall of the protection box 2. The adsorption seat 41 is connected to one end of the first connecting rope 61, and the side of the retracting and unfolding member 42 that is not connected to the protection box 2 and the adsorption seat 41 can be folded. When the first connecting rope 61 is not disconnected from the first trigger member, the distance between the two adsorption seats 41 is the farthest, and the battery module 1 under normal operating conditions is located between the two The two adsorption seats 41 are located between the two adsorption seats 41 on both sides of the battery module 1 and do not generate pressure on the battery module 1 to avoid affecting the falling speed of the battery module 1. At this time, the retraction and expansion springs 44 are compressed, and when the first connecting rope 61 is cut off, the adsorption seat 41 is not restricted by the tension of the first connecting rope 61. The retraction and expansion springs 44 on both sides are reset and extended to push the two adsorption seats 41 to move toward each other, and the two adsorption seats 41 are respectively provided with opposite magnetic blocks. Therefore, the two unrestricted adsorption seats 41 can be quickly converged, adsorbed and closed together under the push of the retraction and expansion springs 44 and in cooperation with the magnetic blocks, driving the two retraction and expansion parts 42 to fully unfold. At this time, the sealing part can play a role of shielding and covering above the battery module 1.

[0041] The two sides of the storage and deployment piece 42 that are not connected to the protection box 2 and the adsorption seat 41 are located in the side sealing mechanism 9, and the side sealing mechanism 9 includes a side seat 91, and the side seat 91 is fixed on the side wall of the protection box 2 and is located below the connecting groove. This arrangement ensures that the sealing of the storage and deployment piece 42 will not be affected by the arrangement of the connecting groove when it is unfolded and closed. A sliding through groove 911 in the shape of "[" is provided in the side seat 91, and a sliding guide 43 is provided in the sliding through groove 911. The storage and deployment piece 42 is connected to the sliding guide 43; the sliding guide 43 includes a guide rod 431 fixed in the sliding through groove 911, and the guide rod 431 passes through a guide hole 432 to be connected to the storage and deployment piece 42. A plurality of guide holes 432 are provided on the storage and deployment piece 42 at equal intervals along the storage and deployment direction of the storage and deployment piece 42, and the guide rods 431 pass through adjacent ones in an interlaced manner. The guide hole 432 is slidably connected to the retractable member 42, and the retractable member 42 is located below the connecting groove. The retractable member 42 includes a cloth piece made of a foldable and unfoldable high-temperature resistant material. When the adsorption seat 41 moves under the action of the retractable spring 44, the retractable member 42 is also driven to slide on the guide rod 431 through the guide hole 432, so that the retractable member 42 can complete the shielding and retracting operation; the adsorption seat 41 is slidably connected to the side seat 91 through the guide slide 411, and the guide slide 411 includes a guide slider installed on the adsorption seat 41, and the guide slider slides horizontally in the guide slide groove opened on the side seat 91. The sliding range and sliding direction of the guide slider are consistent with the extension and retraction range and extension direction of the retractable spring 44. The setting of the guide slide 411 not only strengthens the tightness of the connection between the adsorption seat 41 and the side seat 91, but also makes the movement of the adsorption seat 41 smoother and more accurate.

[0042] An elastic clamping assembly 92 is also provided in the sliding groove 911. The elastic clamping assembly 92 is located on the upper side of the storage and expansion member 42. The elastic clamping assembly 92 includes a clamping rubber strip 921 and an elastic connecting member 922. The elastic connecting member 922 connects the clamping rubber strip 921 and the top position of the sliding groove 911. The side of the clamping rubber strip 921 that is not connected to the elastic connecting member 922 corresponds to the storage and expansion member 42. The elastic clamping assembly 92 is arranged in the gap between the storage and expansion member 42 and the sliding groove 911. The connecting piece 922 is preferably connected to a spring or a rubber connecting strip. The elastic connecting piece 922 expands and contracts along the thickness direction of the storage and deployment piece 42. When the storage and deployment piece 42 completes the storage and deployment operation and is in a static state, the elastic connecting piece 922 expands and contracts to drive the clamping rubber strip 921 to approach the storage and deployment piece 42. The clamping rubber strip 921 located on the upper side of the storage and deployment piece 42 presses the storage and deployment piece 42 downward to fit tightly to the bottom wall of the sliding groove 911 under the action of the elastic connecting piece 922, so that the gas will not flow out through the gap between the storage and deployment piece 42 and the sliding groove 911, thereby improving the sealing effect. Figure 2 and Figure 4 The position of the clamping rubber strip 921 is shown to avoid the guide rod 431 .

[0043] The self-rescue component 5 also includes an exhaust pipe 52, which is connected to the gas tank 51 and is used to release the inert gas in the gas tank 51. A rotating handle 53 is provided on the exhaust pipe 52, and the rotating handle 53 is used to open and close the exhaust pipe 52; a rotating spring 531 is connected between the rotating handle 53 and the gas tank 51. When the battery module 1 operates normally, the second connecting rope 71 pulls and restricts the rotating handle 53, so that the rotating handle 53 is in a closed position. At this time, the rotating spring 531 is in a compressed state. When the second connecting rope 71 is cut off, the rotating handle 53 is not restricted by the tension, and the rotating spring 531 resets and stretches to push the rotating handle 53, so that the rotating handle 53 rotates to the open position, and the inert gas in the gas tank 51 can be released in the protective box 2 through the opened exhaust pipe 52.

[0044] The first transmission mechanism 6 also includes a plurality of first guide rollers 62, the first connecting rope 61 is wound around the first guide rollers 62, and the first guide rollers 62 are rotatably arranged in the protection box 2; the second transmission mechanism 7 also includes a plurality of second guide rollers 72, the second connecting rope 71 is wound around the second guide rollers 72, and the second guide rollers 72 are rotatably arranged on the mounting plate 721, and the mounting plate 721 is fixed on the body of the gas storage tank 51. The setting of the guide rollers can play a role in tensioning and guiding the connecting rope when the connecting rope has not yet broken, so that the connecting rope can better connect to the trigger member.

[0045] The transmission trigger mechanism 8 includes a trigger plate 81, a blade 82 and a linkage trigger member 84. The trigger plate 81 is rotatably arranged at the bottom of the protection box 2 through a connecting shaft 83. The blade 82 is arranged on the side of the trigger plate 81 facing the linkage trigger member 84. The linkage trigger member 84 includes a transverse axis 841 and the first trigger member and the second trigger member arranged on the transverse axis 841. A rotation spring can be further sleeved on the connecting shaft 83, so that the trigger plate 81 will not rotate when it is not subjected to pressure from the support seat 31, and thus will not accidentally trigger the transmission mechanism; the transverse axis 841 is fixedly arranged at the bottom of the protection box 2, the first trigger member includes a first trigger roller 842, the second trigger member includes a second trigger roller 843, and the first trigger roller 842 and the second trigger roller 843 are sleeved It is arranged to be fixed on the transverse axis 841, the other end of the first connecting rope 61 is wound and fixed on the first trigger roller 842, and the other end of the second connecting rope 71 is wound and fixed on the second trigger roller 843; a "U"-shaped trigger groove 844 is opened on the first trigger roller 842 and the second trigger roller 843, and the trigger groove 844 corresponds to the blade 82 for the blade 82 to be inserted, and the connecting rope is wound around the trigger roller and is located on the outside of the trigger groove 844. When the trigger plate 81 is rotated to a preset angle in the direction of the transverse axis 841 by the pressure of the support seat 31, the blade 82 and the trigger groove 844 cooperate to limit and cut off the connecting rope at the corresponding position, so that the connecting rope is disconnected from the trigger roller, and the adsorption seat 41 and the rotating handle 53 can be reset by the spring without the restriction of the connecting rope.

[0046] A plurality of exhaust holes 21 are provided on the bottom surface of the protection box 2, and a check member 211 is provided in the exhaust hole 21. When the folding and opening mechanism 4 is unfolded to cover the upper opening position of the protection box 2, the exhaust pipe 52 releases the inert gas and the air originally existing in the protection box 2 can be discharged to the outside through the exhaust hole 21. Therefore, the check member 211 is preferably a check valve, so that after the air in the protection box 2 closed by the folding and opening mechanism 4 is discharged through the exhaust hole 21, the external gas can no longer enter the protection box 2 through the exhaust hole 21.

[0047] The telescopic connection mechanism 12 includes a plurality of connection components, which are symmetrically arranged about the center line of the protection box 2. 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 chassis 11 at 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 connection plate is detachably connected to the protection box 2 through the connection member. When the power cylinders located on both sides of the protection box 2 are in the original state, the connection rod is close to the protection box 2. At this time, the connection plate is connected to the protection box 2 through the connection member 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 includes an insert block fixed on the protection box 2, and the insert block is horizontally inserted into the slot. The slot is provided in the connecting plate. When the power electric cylinder drives the connecting rod away from the protection box 2, the connecting plate 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 mounting groove 111. On the contrary, the connecting plate is close so that the insert block is inserted into the slot, and the protection box 2 can be supported in the mounting groove 111 by the connecting assembly; the connecting rod includes an outer sleeve, an inner sliding rod and a connecting spring. The connecting spring is arranged in the outer sleeve, and the top end of the inner sliding 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, and the bottom end of the inner sliding rod is located outside the outer sleeve and is fixedly connected to the connecting plate. It is slidably connected to the outer sleeve. As the battery module 1 disconnects from the bottom of the car and falls onto the support seat 31, the support seat 31 slides down to a certain degree and is subjected to force, which also causes the protection box 2 to be subjected to force. At this time, the protection box 2 moves down under the action of pressure, and pulls the inner slide rod to slide downward through the connecting plate. The connecting spring in the original state is elongated, and the connecting assembly still supports the protection box 2. The inner slide rod slides longitudinally, and the connecting spring cooperates to perform longitudinal expansion and contraction; the outer sleeve is slidably connected to the automobile chassis 11 through a sleeve sliding member, and the power electric cylinder is connected to the outer sleeve; the sleeve sliding member includes a sleeve sliding member installed on the outer sleeve, the sleeve sliding member cooperates to slide horizontally in the sleeve sliding groove, the sleeve sliding groove is opened at the bottom of the car, the power electric cylinder expands and contracts to drive the outer sleeve to move horizontally, and the sleeve sliding member The cooperation between the block and the sleeve slide groove makes the movement of the connecting rod more accurate and stable. The connecting assembly also includes 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. The moving block is slidably connected to the connecting plate through a support rod sliding member; the support rod sliding member includes a support rod slider installed on the moving block, the support rod slider cooperates to slide horizontally in the support rod slide groove, and the support rod slide groove is opened on the connecting plate. As the inner slide rod is extended or retracted, the distance between the connecting plate and the outer sleeve changes, and the telescopic support rod can be extended and rotated in cooperation with the movement of the connecting plate. At the same time, the moving block can also slide on the connecting plate as the angle between the telescopic support rod and the outer sleeve changes. The coordinated setting of the telescopic support rod makes the coordination stability of the connecting plate and the connecting rod better.

[0048] The implementation principle of the present invention is as follows: when the mounting member 13 obtains the thermal runaway signal output by the battery monitoring unit, the mounting member 13 disconnects the battery module 1 from the vehicle, and the battery module 1 falls on the support seat 31. The support seat 31 is forced to slide downward and penetrate into the inner bottom of the protection box 2. When the support seat 31 slides downward to a preset position, the battery module 1 is located below the side seat 91 at this time. The support seat 31 also applies pressure to the trigger plate 81, so that the trigger plate 81 rotates in the direction of the trigger roller until the blade 82 and the trigger groove 844 cooperate with each other on both sides of the connecting rope to connect the connecting rope. After the first connecting rope 61 is disconnected, the retracting and unfolding spring 44 quickly pops open and resets, so that the two adsorption seats 41 move toward each other until they are adsorbed and fitted, and the retracting and unfolding member 42 can be fully unfolded to cover the top of the battery module 1. After the second connecting rope 71 is disconnected, the rotating spring 531 pops open and resets, pushing the rotating handle 53 to rotate and open the exhaust pipe 52, so that the inert gas is released to complete the self-rescue operation of the battery module 1. After that, the vehicle can be driven to a safe position, and the power cylinder can be opened to separate the protection box 2 from the connecting plate. The protection box 2 can then be separated from the vehicle while carrying the battery module 1.

[0049] 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.

[0050] 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 battery device for a new energy vehicle with a breakaway protection function, comprising a battery monitoring unit, a mounting member, a battery module and a protection box, wherein the battery module is detachably mounted on the bottom of the vehicle through the mounting member, a protection box is arranged on the lower outer side of the battery module, and the protection box is arranged in a mounting slot provided on the bottom of the vehicle, 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, and the protection box is connected to the bottom of the vehicle through a telescopic connection mechanism provided on the vehicle, characterized in that: The top surface of the protection box is provided with an opening for the battery module to enter, and the protection box is provided with a sliding support mechanism, a folding opening and closing mechanism, a self-rescue assembly and a transmission trigger mechanism, the sliding support mechanism is located below the battery module and is used to support the battery module disconnected from the bottom of the car, the folding opening and closing mechanism is located above the sliding support mechanism and is connected to the first trigger member through a first transmission mechanism, the self-rescue assembly is located below the folding opening and closing mechanism and is connected to the second trigger member through a second transmission mechanism, the first trigger member and the second trigger member are both arranged in the protection box and are arranged corresponding to the transmission trigger mechanism, the transmission trigger mechanism is arranged below the sliding support mechanism, and when the sliding support mechanism slides vertically downward to a preset position, a force is applied to the transmission trigger mechanism, so that the transmission trigger mechanism simultaneously disconnects the connection between the first trigger member and the first transmission mechanism and the connection between the second trigger member and the second transmission mechanism; The first transmission mechanism includes a first connecting rope, one end of which is connected to the folding and opening mechanism, and the other end is connected to the first trigger member. The second transmission mechanism includes a second connecting rope, one end of which is connected to the self-rescue component, and the other end is connected to the second trigger member. When the battery monitoring unit outputs a thermal runaway signal, the mounting member disconnects the battery module from the bottom of the car, and the battery module falls onto the sliding support mechanism. When the sliding support mechanism drives the battery module to slide and fall to a preset position in the protection box, the sliding support mechanism applies force to the transmission trigger mechanism, and the transmission trigger mechanism cuts off the connection between the first connecting rope and the first trigger member. The folding and opening mechanism moves and unfolds along the horizontal direction of the battery module to completely cover the top of the battery module. The transmission trigger mechanism simultaneously cuts off the connection between the second connecting rope and the second trigger member. The gas tank in the self-rescue component releases inert gas, so that the battery module is wrapped by the inert gas in the sealed environment formed by the folding and opening mechanism and the protection box to complete the out-of-control self-rescue operation.

2. A battery device for new energy vehicles with a disconnection protection function 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 battery device for new energy vehicles with a disconnection protection function according to claim 1, characterized in that: The sliding support mechanism comprises a support seat and a support spring, wherein the support seat is connected to the inner lower part of the protection box via the support spring, and the support seat is slidably connected to the side wall of the protection box via a support sliding member; The supporting sliding member includes a supporting sliding block installed on the supporting seat, and the supporting sliding block slides up and down in a supporting sliding groove opened on the inner wall of the protection box. The sliding direction and sliding range of the supporting sliding block are consistent with the extension direction and extension range of the supporting spring.

4. A battery device for new energy vehicles with a disconnection protection function according to claim 1, characterized in that: The folding and opening mechanism includes two sealing members symmetrically arranged on both sides of the battery module, and the sealing member includes an adsorption seat, a retracting and extending member and a retracting and extending spring. One end of the retracting and extending member is fixed to the side wall of the protection box, and the other end is fixedly connected to the adsorption seat. The retracting and extending spring is connected between the adsorption seat and the side wall of the protection box, and the adsorption seat is connected to one end of the first connecting rope.

5. A battery device for new energy vehicles with a disconnection protection function according to claim 4, characterized in that: The two sides of the storage and unfolding member that are not connected to the protection box and the adsorption seat are located in the side sealing mechanism, and the side sealing mechanism includes a side seat, and the side seat is fixed on the side wall of the protection box, and a "["-shaped sliding groove is opened in the side seat, and a sliding guide is provided in the sliding groove, and the storage and unfolding member is connected to the sliding guide; The sliding guide member comprises a guide rod fixed in the sliding groove, the guide rod passes through a guide hole and is connected to the retracting and extending member, a plurality of guide holes are provided on the retracting and extending member at equal intervals along the retracting and extending direction of the retracting and extending member, and the guide rod passes through adjacent guide holes in an alternating manner and is slidably connected to the retracting and extending member; The adsorption seat is slidably connected to the side seat via a guide slide, and the guide slide comprises a guide slider installed on the adsorption seat, and the guide slider slides horizontally in a guide slide groove provided on the side seat.

6. A battery device for new energy vehicles with a disconnection protection function according to claim 5, characterized in that: An elastic clamping assembly is also provided in the sliding groove, and the elastic clamping assembly is located on the upper side of the stowage and expansion piece. The elastic clamping assembly includes a clamping strip and an elastic connecting piece, and the elastic connecting piece connects the clamping strip and the sliding groove, and the side of the clamping strip that is not connected to the elastic connecting piece corresponds to the stowage and expansion piece.

7. A battery device for new energy vehicles with a disconnection protection function according to claim 1, characterized in that: The self-rescue assembly further comprises an exhaust pipe, the exhaust pipe is connected to the gas storage tank for releasing the inert gas in the gas storage tank, and a rotating handle is provided on the exhaust pipe, the rotating handle is used to open and close the exhaust pipe; A rotation spring is connected between the rotating handle and the gas storage tank.

8. The battery device for new energy vehicles with a disconnection protection function according to claim 1, characterized in that: The first transmission mechanism further comprises a plurality of first guide rollers, the first connecting rope is wound around the first guide rollers, and the first guide rollers are rotatably arranged in the protection box; The second transmission mechanism also includes a plurality of second guide rollers, the second connecting rope is wound around the second guide rollers, the second guide rollers are rotatably arranged on the mounting plate, and the mounting plate is fixed on the body of the gas storage tank.

9. A battery device for new energy vehicles with a disconnection protection function according to claim 1, characterized in that: The transmission trigger mechanism comprises a trigger plate, a blade and a linkage trigger member, wherein the trigger plate is rotatably arranged below the bottom of the protection box through a connecting shaft, the blade is arranged on a surface of the trigger plate facing the linkage trigger member, and the linkage trigger member comprises a transverse axis and the first trigger member and the second trigger member arranged on the transverse axis; The horizontal axis is fixedly arranged at the bottom of the protection box, the first trigger member includes a first trigger roller, the second trigger member includes a second trigger roller, the first trigger roller and the second trigger roller are sleeved and fixed on the horizontal axis, the other end of the first connecting rope is wound and fixed on the first trigger roller, and the other end of the second connecting rope is wound and fixed on the second trigger roller; A "U"-shaped trigger groove is provided on the first trigger roller and the second trigger roller, and the trigger groove corresponds to the blade for the blade to be inserted into.

10. A battery device for new energy vehicles with a disconnection protection function according to claim 1, characterized in that: The bottom surface of the protection box is provided with a plurality of exhaust holes, and anti-return parts are arranged in the exhaust holes.

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