Emergency device and control method for a vehicle

Abstract

This application discloses an emergency device and control method for a vehicle. The vehicle includes a drive motor, a power battery pack, doors, and a vehicle body. The doors can be opened and closed relative to the vehicle body. The emergency device includes a sensor, a door lock mechanism, and a mechanical conversion component. The sensor is configured to undergo a preset shape change when the temperature of the power battery pack rises to a preset temperature. The door lock mechanism includes a locking component and an unlocking component. The unlocking component includes an electric unlocking component, an active unlocking component, and a mechanical unlocking component. The mechanical conversion component is driven and cooperates with the sensor, the mechanical unlocking component, and the power supply switch of the power battery pack. When the sensor undergoes a shape change, the mechanical conversion component drives the mechanical unlocking component to perform an unlocking action and disconnects the power supply switch via mechanical transmission. This application provides an emergency device and control method for a vehicle to solve the technical problem that in existing vehicles, when the power battery catches fire, the doors are difficult to unlock and the power battery cannot be disconnected from the power supply.

Description

Technical Field

[0001] This application belongs to the field of new energy vehicle technology, specifically relating to an emergency device and control method for a vehicle. Background Technology

[0002] With the rapid development of the new energy vehicle industry, new energy vehicles are using electric unlocking to control the doors. This relies on the coordinated operation of the on-board electronic control system, low-voltage power supply system, and electric door lock actuator. Compared with traditional mechanical unlocking, this significantly improves the user experience and vehicle quality.

[0003] However, the power batteries of new energy vehicles are prone to thermal runaway under conditions such as long-term use or abnormal charging, which can lead to combustion accidents. This is often accompanied by a power outage in the vehicle's low-voltage system, paralysis of the electronic control system, and failure of the power-off relays of the electronic control system and the central locking system, resulting in the failure of electric door unlocking. Even if the vehicle is equipped with a hidden mechanical emergency handle, its concealed location and complex operation make it difficult to operate quickly in high-temperature and smoky environments, thus failing to guarantee that the door can be opened quickly.

[0004] Therefore, it is necessary to develop an emergency device for new energy vehicles to solve the technical problems of difficulty in unlocking the car door when the power battery catches fire and the inability of the power battery to disconnect the power supply. This device will ensure that the car door can be unlocked automatically or quickly and reliably when the power battery catches fire, improve the opening speed of the car door, and enable the power battery to disconnect the power supply. Summary of the Invention

[0005] This application provides an emergency device and control method for a vehicle to solve the technical problem that when the power battery of a new energy vehicle catches fire, the power-off relay of the electronic control system and the central locking of the door fail, resulting in the power battery being unable to disconnect the power supply, the electric unlocking of the door failing, and the door being difficult to unlock.

[0006] The primary objective of this application is to provide an emergency device for a vehicle, and the technical solution adopted is as follows: An emergency device for a vehicle, the vehicle being powered by electricity, the vehicle including a drive motor and a power battery pack providing power to the drive motor, the vehicle also including doors and a vehicle body, the doors being openable and closable relative to the vehicle body, the emergency device including: The sensing element is disposed on the power battery assembly and configured to undergo a preset shape change when the temperature of the power battery assembly rises to a preset temperature. The door lock mechanism includes a locking component for locking the door to the vehicle body, and an unlocking component for releasing the locking engagement. The unlocking component includes an electric unlocking component, an active unlocking component, and a mechanical unlocking component. The mechanical conversion component is in drive cooperation with the sensing element, the mechanical unlocking element, and the power supply switch of the power battery assembly. When the sensor changes shape, the mechanical force generated by the change acts on the mechanical conversion component, triggering the mechanical conversion component to drive the mechanical unlocking component to perform an unlocking action through mechanical transmission, and causing the power supply switch to disconnect, thereby cutting off the power supply output of the power battery pack.

[0007] The emergency device according to the first objective of this application also includes the following additional technical features: The morphological change is that the sensing element breaks when its temperature reaches a preset temperature. The mechanical conversion component includes an energy storage spring, which is connected to the sensing element through a first cable. When the sensing element breaks, the energy storage spring resets and drives the mechanical unlocking component to perform an unlocking action, as well as causing the power supply switch to disconnect.

[0008] The mechanical conversion component also includes a mounting component fixed to the vehicle body. The mounting component has a mounting hole for mounting an energy storage spring. The energy storage spring includes a fixed end fixedly connected to the mounting component and a movable end connected to the first cable.

[0009] The mounting component has a guide hole that connects to the mounting hole and a movable component that is movably disposed in the guide hole. The movable component is connected to the moving end. The mechanical conversion component also includes a rotating component and a second cable. The rotating component is rotatably disposed on the vehicle body. One end of the second cable is connected to the rotating component, and the other end is connected to the mechanical unlocking component. The movement of the movable component can drive the rotating component to wind the second cable to drive the mechanical unlocking component to perform the unlocking action.

[0010] The mechanical conversion component also includes a transmission rod, which is telescopically connected. One end of the transmission rod is connected to the rotating component, and the other end is rotatably connected to the moving component.

[0011] The locking assembly includes a latch and a lock body. The latch is located on the door, and the lock body is located on the vehicle body. The door lock mechanism also includes a power elastic element. The latch and the lock body cooperate to lock the door and enable the power elastic element to maintain an energy storage state. When the rotating component winds the second cable, the second cable can drive the mechanical unlocking component to release the latch from the lock body and release the energy stored in the power elastic element, which then drives the door to open.

[0012] The mechanical conversion component drives the power supply switch to disconnect via mechanical transmission. The vehicle body is equipped with a positioning shaft, and a rotating component is rotatably mounted on the positioning shaft. The mechanical conversion component also includes a follower component rotatably mounted on the positioning shaft. The rotating component is connected to the follower component, and the follower component is connected to the power supply switch via a third cable. The rotation of the rotating component drives the follower component to wind around the third cable, thereby disconnecting the power supply switch.

[0013] The lock body is equipped with a locking element that engages with the latch. The locking element is connected to the lock body via a reset elastic element. The locking element can rotate relative to the vehicle body. The electric unlocking element includes a drive element that drives the locking element to rotate, thereby releasing the latch from the locking element. The reset elastic element is used to reset the locking element. The mechanical unlocking element includes a drive rod located below the locking element. The drive rod is rotatably mounted on the lock body. One end of the second cable is connected to the rotating element, and the other end is connected to the drive rod. The rotation of the rotating element drives the drive rod to rotate, and the drive rod abuts against the locking element, thereby disengaging the locking element from the latch.

[0014] The sensing element includes a first connector, a second connector, and a thermal sensor. The first connector and the second connector are connected through the thermal sensor. The first connector is connected to the power battery assembly, and the second connector is connected to the first cable. The thermal sensor is at least partially attached to the power battery assembly.

[0015] A second objective of this application is to provide a control method utilizing the emergency device described in the first objective, the control method comprising: The preset temperature is determined based on the safe temperature threshold of the power battery assembly; The system acquires temperature information from the power battery pack and controls the electric unlocking mechanism based on the temperature information and the status of the vehicle door. When the temperature of the power battery assembly rises to a preset temperature, the sensing element undergoes a preset shape change; The mechanical force generated by the change in shape drives the movement of mechanical conversion components.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: This application incorporates a sensor that, when located within the power battery pack, undergoes a pre-defined shape change upon reaching a preset temperature. A mechanical conversion component engages with the sensor, the mechanical unlocking component, and the power supply switch of the power battery pack. When the power battery pack reaches a preset threshold temperature due to thermal runaway or other abnormal conditions, the sensor naturally undergoes a shape change. The mechanical force generated during this change directly acts on the mechanical conversion component, eliminating the need for the vehicle's low-voltage power supply system and electronic control system. This mechanical transmission then drives the mechanical unlocking component to perform an unlocking action, releasing the door from the vehicle body's lock. This reduces the difficulty of opening the door when the power battery pack temperature rises abnormally or even catches fire, ensuring smooth door opening. The mechanical conversion component works in conjunction with the power supply switch of the power battery pack. The mechanical force generated by the change in the shape of the sensing element will also cause the power supply switch to disconnect, thus cutting off the power supply output of the power battery pack in a timely manner. This prevents the power battery pack from continuing to supply power, which could lead to increased thermal runaway and the spread of fire, further enhancing the vehicle's protection capabilities. The entire emergency triggering process relies on mechanical transmission and does not require additional complex electronic control modules and power supply units. This reduces the manufacturing cost of the device and also reduces the possibility of emergency function failure due to electronic component failure, ensuring that the emergency device operates stably in extreme scenarios. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the installation of an emergency device according to one embodiment of this application; Figure 2 This is a schematic diagram of the installation of the mechanical conversion component and the power battery assembly according to one embodiment of this application; Figure 3 This is a schematic diagram of the displacement member according to one embodiment of this application; Figure 4 This is a flowchart illustrating the control method according to one embodiment of this application.

[0018] List of components and reference numerals: 1. Sensing element; 11. First connecting element; 12. Second connecting element; 13. Thermal sensing element; 2. Door lock mechanism; 21. Locking assembly; 211. Locking latch; 212. Lock body; 2121. Locking element; 22. Unlocking assembly; 221. Electric unlocking element; 2211. Drive element; 222. Mechanical unlocking element; 2221. Drive rod; 23. Mounting base plate; 231. Moving guide rail; 3. Mechanical conversion component; 31. Energy storage spring; 32. First cable; 33. Mounting component; 331. Guide hole; 332. Moving component; 34. Rotating component; 35. Second cable; 36. Transmission rod; 37. Third cable; 38. Follower component; 4. Power battery components; 5. Power switch; 6. Vehicle body; 61. Positioning shaft; 7. Active unlocking component; 71. Operation button; 72. Connecting cable; 73. Displacement component; 74. Receiving hole; 75. Elastic component; 76. Positioning pin; 77. Mounting handle. Detailed Implementation

[0019] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0021] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0024] like Figure 1 , Figure 2 As shown, this application discloses an emergency device for a vehicle. The vehicle uses electrical energy as its driving power source. The vehicle includes a drive motor and a power battery pack 4 that provides electrical energy to the drive motor. The vehicle also includes a door and a vehicle body 6. The door can be opened and closed relative to the vehicle body 6. The emergency device includes: The sensor 1 is disposed on the power battery assembly 4 and configured to undergo a preset shape change when the temperature of the power battery assembly 4 rises to a preset temperature. The door lock mechanism 2 includes a locking component 21 for locking the door to the vehicle body 6, and an unlocking component 22 for releasing the locking engagement. The unlocking component 22 includes an electric unlocking component 221, an active unlocking component 7, and a mechanical unlocking component 222. Mechanical conversion component 3 is in transmission cooperation with sensing component 1, mechanical unlocking component 222 and power supply switch 5 of power battery assembly 4 respectively; When the sensor 1 changes shape, the mechanical force generated by the change acts on the mechanical conversion component 3, triggering the mechanical conversion component 3 to drive the mechanical unlocking component 222 to perform an unlocking action through mechanical transmission, and to drive the power supply switch 5 to disconnect, thereby cutting off the power supply output of the power battery pack 4.

[0025] This application incorporates a sensor 1. Since the sensor 1 is located within the power battery pack 4 and undergoes a preset shape change when the power battery pack 4 reaches a preset temperature, and the mechanical conversion component 3 is in transmission cooperation with the sensor 1, the mechanical unlocking component 222, and the power supply switch 5 of the power battery pack 4, when the power battery pack 4 reaches a preset threshold temperature due to abnormal conditions such as thermal runaway, the sensor 1 will naturally undergo a shape change. The mechanical force generated during this shape change will directly act on the mechanical conversion component 3, without relying on the vehicle's low-voltage power supply system and electronic control system. This mechanical transmission will then drive the mechanical unlocking component 222 to perform an unlocking action, thereby releasing the locking engagement between the door and the vehicle body 6. This reduces the difficulty of opening the car door when the power battery temperature rises abnormally or even catches fire, ensuring that the door can be opened smoothly. The mechanical conversion component 3 also works in conjunction with the power supply switch 5 of the power battery pack 4. The mechanical force generated by the change in the shape of the sensing element 1 will also drive the power supply switch 5 to disconnect, cutting off the power supply output of the power battery pack 4 in time, preventing the power battery pack 4 from continuing to supply power and causing thermal runaway to intensify and the fire to spread, further improving the vehicle's protection capabilities. The entire emergency triggering process relies on mechanical transmission, without the need for additional complex electronic control modules and power supply units. This reduces the manufacturing cost of the device and also reduces the possibility of emergency function failure due to electronic component failure, ensuring that the emergency device operates stably in extreme scenarios.

[0026] In this application, the shape of the sensing element 1 can be any of the following embodiments: Implementation method one: such as Figure 1 , Figure 2 As shown, the morphological change is that the sensor 1 breaks when the temperature reaches the preset temperature. The mechanical conversion component 3 includes an energy storage spring 31, which is connected to the sensor 1 through a first cable 32. When the sensor 1 breaks, the energy storage spring 31 resets and drives the mechanical unlocking component 222 to perform the unlocking action, and also drives the power supply switch 5 to disconnect.

[0027] The sensor 1 is designed to break when its temperature reaches a preset temperature. The energy storage spring 31 is connected to the sensor 1 via a first cable 32. When the sensor 1 breaks due to heat reaching the preset temperature, the constraint of the first cable 32 on the energy storage spring 31 is immediately released. The energy storage spring 31 can automatically reset under its own elastic force, thereby driving the mechanical unlocking component 222 to perform the unlocking action and causing the power supply switch 5 to disconnect. The energy storage and release of the energy storage spring 31 does not rely on circuits, sensors, or external control. The triggering method is direct and reliable, and it can stably achieve unlocking and power-off protection under abnormal high-temperature conditions, effectively improving the reliability of the emergency device in high-temperature environments.

[0028] Implementation Method 2: This Implementation Method 2 is not illustrated. The difference from Implementation Method 1 is that the morphological change is that the sensing element liquefies or vaporizes when the temperature reaches a preset temperature.

[0029] Implementation Method 3: This implementation method 3 is not illustrated. Unlike implementation method 1, when the temperature of the sensing element reaches the preset temperature, the sensing element changes from a rigid state to a flexible state and can be stretched.

[0030] As a preferred embodiment of the implementation method, such as Figure 1 , Figure 2 As shown, the mechanical conversion component 3 also includes a mounting member 33 fixed to the vehicle body 6. The mounting member 33 has a mounting hole for mounting the energy storage spring 31. The energy storage spring 31 includes a fixed end fixedly connected to the mounting member 33 and a movable end connected to the first cable 32. Figure 2 As shown, the left end of the energy storage spring 31 is the fixed end, and the right end is the movable end.

[0031] By providing mounting holes for assembling the energy storage spring 31 on the mounting component 33, stable and precise assembly positioning of the energy storage spring 31 can be achieved. This ensures that the energy storage spring 31 moves in a preset direction under the constraint of the mounting holes, preventing the energy storage spring 31 from shifting, shaking, or jamming during energy storage or reset. The energy storage spring 31 includes a fixed end fixedly connected to the mounting component 33 and a movable end connected to the first cable 32. This allows the fixed end of the energy storage spring 31 to form a reliable force-bearing fulcrum, ensuring that the energy storage spring 31 can stably release elastic force and drive subsequent components after the sensing element 1 breaks, thereby improving the operational reliability of the mechanical conversion component 3.

[0032] Those skilled in the art will understand that, in addition to the method of setting mounting holes in the mounting part 33 as in Embodiment 1, the energy storage spring 31 can also be installed by setting mounting grooves in the mounting part 33.

[0033] As a preferred specific example under Embodiment 1, such as Figure 1 , Figure 2 As shown, the mounting component 33 is provided with a guide hole 331 that communicates with the mounting hole and a moving component 332 that is movably disposed in the guide hole 331. The moving component 332 is connected to the moving end. The mechanical conversion component 3 also includes a rotating component 34 and a second cable 35. The rotating component 34 is rotatably disposed on the vehicle body 6. One end of the second cable 35 is connected to the rotating component 34, and the other end is connected to the mechanical unlocking component 222. The movement of the moving component 332 can drive the rotating component 34 to wind the second cable 35 to drive the mechanical unlocking component 222 to perform the unlocking action.

[0034] By providing a guide hole 331 on the mounting component 33 that communicates with the mounting hole, and movably mounting a moving component 332 within the guide hole 331, the moving component 332 is connected to the moving end of the energy storage spring 31. The guide hole 331 constrains and guides the movement direction of the moving component 332, ensuring that the moving component 332 moves stably only along a preset path, thus guaranteeing smooth and reliable power transmission from the energy storage spring 31. Simultaneously, by rotatably mounting a rotating component 34 on the vehicle body 6, and connecting the rotating component 34 and the mechanical unlocking component 222 via a second cable 35, when the moving component 332 moves under the drive of the energy storage spring 31, it can drive the rotating component 34 to rotate and wind around the second cable 35, thereby converting the linear motion of the energy storage spring 31 into the unlocking action of the mechanical unlocking component 222. The mechanical conversion component 3 has a simple and compact structure, a clear transmission path, rapid action response, and high transmission efficiency. It can quickly and stably achieve the unlocking action when triggered by high temperatures, ensuring timely and reliable action of the protection mechanism and improving the safety and stability of the emergency device under abnormal operating conditions.

[0035] Furthermore, the guide hole 331 includes two opposing inner walls, the inner walls are provided with guide grooves, and the moving member 332 is provided with a moving protrusion that cooperates with the guide grooves.

[0036] In specific example 1, the way the moving part 332 drives the rotating part 34 to rotate can be any of the following examples: Example 1: such as Figure 1 , Figure 2 As shown, the mechanical conversion component 3 also includes a transmission rod 36, which is telescopically connected. One end of the transmission rod 36 is connected to the rotating component 34, and the other end is rotatably connected to the moving component 332.

[0037] By setting a telescopic transmission rod 36, one end of which is connected to the rotating component 34 and the other end is rotatably connected to the moving component 332, the linear motion of the moving component 332 can be stably converted into the rotational motion of the rotating component 34, achieving a reliable conversion of motion mode. The telescopic transmission rod 36 forms a rotational engagement with the moving component 332 and the rotating component 34, which can adaptively compensate for assembly deviations and positional changes during motion transmission, avoiding jamming, binding, or interference during transmission, ensuring continuous and smooth power transmission, and ensuring that the reset power of the energy storage spring 31 is efficiently transmitted to the rotating component 34, thereby stably driving subsequent unlocking actions and improving the operational reliability and stability of the entire protection mechanism.

[0038] Example 2: This example 2 is not illustrated. The guide hole is arc-shaped. The mechanical conversion component also includes a moving rod. One end of the moving rod is connected to the rotating component, and the other end is rotatably connected to the moving component. One of the moving component and the inner wall of the guide hole is provided with a guide protrusion, and the other is provided with a guide groove that cooperates with the guide protrusion.

[0039] As a preferred example under specific example 1, such as Figure 1 , Figure 2 As shown, the locking assembly 21 includes a latch 211 and a lock body 212. The latch 211 is disposed on the door, and the lock body 212 is disposed on the vehicle body 6. The door lock mechanism 2 also includes a power elastic element. The latch 211 and the lock body 212 cooperate to lock the door and enable the power elastic element to maintain an energy-storing state. When the rotating member 34 winds the second cable 35, the second cable 35 can drive the mechanical unlocking member 222 to release the cooperation between the latch 211 and the lock body 212, and at the same time release the energy stored in the power elastic element, which drives the door to open. Preferably, the power elastic element is fixed to the vehicle body and has an abutting end that abuts against the door. When the door is closed, the latch 211 and the lock body 212 cooperate to lock the door and compress the power elastic element, enabling the power elastic element to maintain an energy-storing state.

[0040] The door is locked by the cooperation of the latch 211 and the lock body 212, and the power elastic element is kept in an energy-storing state. When the rotating part 34 winds the second cable 35, it can drive the mechanical unlocking part 222 to release the locking cooperation between the latch 211 and the lock body 212, and at the same time release the energy stored in the power elastic element. Then the power elastic element drives the door to open automatically, linking the unlocking action with the door opening action, improving the timeliness and reliability of the mechanism's action in emergency situations, and enabling the door to open after unlocking, thus improving the stability of the emergency device.

[0041] Furthermore, such as Figure 1 , Figure 2 As shown, the mechanical conversion component 3 drives the power switch 5 to disconnect via mechanical transmission. The vehicle body 6 is provided with a positioning shaft 61, and the rotating component 34 is rotatably mounted on the positioning shaft 61. The mechanical conversion component 3 also includes a follower component 38 rotatably mounted on the positioning shaft 61. The rotating component 34 is connected to the follower component 38, and the follower component 38 is connected to the power switch 5 via a third cable 37. The rotation of the rotating component 34 drives the follower component 38 to wind around the third cable 37, thereby disconnecting the power switch 5. Further, the vehicle body 6 is also provided with a first guide pulley that abuts against the third cable 37. Preferably, the emergency device also includes a lever structure, which includes a base fixed to the vehicle body 6 and a trigger rod rotatably mounted on the base. One end of the trigger rod abuts against the power switch 5, and the other end is connected to the third cable 37. When the follower component 38 winds around the third cable 37, the third cable 37 drives the trigger rod to rotate, thereby disconnecting the power switch 5.

[0042] By setting a positioning shaft 61 on the vehicle body 6, both the rotating component 34 and the follower component 38 are rotatably mounted on the same positioning shaft 61, enabling the rotating component 34 and the follower component 38 to be arranged coaxially, achieving stable and reliable linkage between them. When the rotating component 34 rotates, it can synchronously drive the follower component 38 to rotate around the positioning shaft 61. The follower component 38 pulls the power supply switch 5 to disconnect by winding the third cable, thereby simultaneously completing the power-off action while performing the door unlocking action, ensuring that the unlocking action and the power-off action are triggered synchronously, further improving the response speed of the emergency device under abnormal working conditions.

[0043] As a preferred option, such as Figure 1 , Figure 2 As shown, the lock body 212 is provided with a locking member 2121 that cooperates with the latch 211. The locking member 2121 is connected to the lock body 212 through a reset elastic member. The locking member 2121 can rotate relative to the vehicle body 6. The electric unlocking member 221 includes a driving member 2211. The driving member 2211 drives the locking member 2121 to rotate to release the latch 211 from the locking member 2121. The reset elastic member is used to drive the locking member 2121 to reset. The mechanical unlocking member 222 includes a driving rod 2221 disposed below the locking member 2121. The driving rod 2221 is rotatably disposed on the lock body 212. The mechanical conversion component 3 includes a second cable 35. One end of the second cable 35 is connected to a rotating member 34, and the other end is connected to the driving rod 2221. The rotating member 34 rotates to drive the driving rod 2221 to rotate. The driving rod 2221 abuts against the locking member 2121 to disengage the locking member 2121 from the latch 211. Furthermore, the vehicle body 6 is provided with a second guide pulley that abuts against the second cable 35. Preferably, the reset elastic element is a torsion spring, with one end of the torsion spring connected to the locking element and the other end connected to the vehicle body.

[0044] Furthermore, such as Figure 1 , Figure 3As shown, the active unlocking component 7 includes an operation button 71 disposed on the vehicle door and a connecting cable 72 connecting the operation button 71. The door lock mechanism 2 includes a mounting base plate 23, a lock body 212 disposed on the mounting base plate 23, and a moving guide rail 231 provided on the mounting base plate 23. The active unlocking component 7 also includes a displacement component 73 that is moved and disposed on the moving guide rail 231. The displacement component 73 has a receiving hole 74, an elastic component 75 and a positioning pin 76 are provided in the receiving hole 74, and a guide groove is provided on the inner wall of the receiving hole 74. The positioning pin 76 has a mounting handle 77 extending from the guide groove. The connecting cable 72 is connected via a pulley. The mounting handle 77 and the moving guide rail 231 are provided with a locking hole that mates with the positioning pin 76. Under normal conditions, the elastic element 75 drives the positioning pin 76 to engage with the locking hole. The door locking and unlocking actions are performed by the electric unlocking element 221. The electric unlocking element 221 is powered by a drive power source located at the front of the vehicle. When the drive power fails, pulling the operation button 71 causes the positioning pin 76 to retract and unlock, and drives the displacement element 73 to move along the moving guide rail 231. The locking element 2121 is located on the moving path of the displacement element 73, and the locking element 2121 is unlocked by the displacement element 73. Preferably, the moving guide rail 231 is provided with an assisting elastic element. Under normal conditions, the assisting elastic element is in a stretched state, and the displacement element 73 is located above the driven end of the locking element 2121.

[0045] Those skilled in the art will understand that in this application, multiple guide pulleys are provided according to the arrangement of the cables in order to improve the operational stability and guiding effect of the cables.

[0046] By providing a locking element 2121 that cooperates with the latch 211 in the lock body 212, and connecting the locking element 2121 to the lock body 212 via a reset elastic element, the locking element 2121 can rotate relative to the vehicle body 6. This allows for reliable locking of the vehicle door through the cooperation of the locking element 2121 and the latch 211, and also enables the locking element 2121 to stably reset after unlocking by the reset elastic element. The electric unlocking element 221 drives the locking element 2121 to rotate via the drive element 2211, enabling electric unlocking and meeting conventional usage requirements. The mechanical unlocking element 222 is located on the drive rod 2221 below the locking element 2121, and the drive rod 2221 is rotatably mounted on the lock body 212. The mechanical conversion component 3 connects the rotating component 34 and the drive rod 2221 via the second cable 35. When the rotating component 34 rotates, the second cable 35 drives the drive rod 2221 to rotate, causing the drive rod 2221 to abut against and drive the locking component 2121 to rotate. This disengages the locking component 2121 from the latch 211, achieving emergency unlocking of the latch 211. By integrating electric unlocking and mechanical unlocking into the same lock body 212, while ensuring the conventional electric unlocking function, reliable unlocking can be achieved under abnormal working conditions using an independent mechanical structure, unaffected by circuit failure. The drive rod 2221 and the locking component 2121 adopt an abutting engagement, resulting in direct transmission and stable operation, ensuring timely triggering and reliable unlocking in emergency situations.

[0047] Preferably, the driving component 2211 includes a driving motor and an abutting rod, the output shaft of the driving motor is connected to the abutting rod, and the abutting rod abuts against the locking component 2121.

[0048] In embodiment one, the sensor 1 can be configured in any of the following embodiments: Example 2: Figure 1 , Figure 2 As shown, the sensing element 1 includes a first connector 11, a second connector 12, and a thermal sensor 13. The first connector 11 and the second connector 12 are connected through the thermal sensor 13. The first connector 11 is connected to the power battery assembly 4, the second connector 12 is connected to the first cable 32, and the thermal sensor 13 is at least partially attached to the power battery assembly 4.

[0049] The sensing element 1 includes a first connector 11, a second connector 12, and a thermal sensor 13. The first connector 11 and the second connector 12 are connected via the thermal sensor 13. The first connector 11 is connected to the power battery assembly 4, and the second connector 12 is connected to the first cable 32. The thermal sensor 13 is at least partially in contact with the power battery assembly 4, enabling the temperature of the power battery assembly 4 to be directly and quickly transferred to the thermal sensor 13, thereby improving the response speed of the thermal sensor 13. Abnormal heat from the power battery assembly 4 is directly transferred to the thermal sensor 13, causing it to undergo a shape change when it reaches a preset temperature. This releases the force of the energy storage spring 31 through the first cable 32, ensuring that the emergency device can be activated quickly in the event of an overheating anomaly in the power battery.

[0050] Furthermore, the power battery assembly 4 includes a housing and a battery cell disposed within the housing. The housing is provided with a positioning groove, the first connector 11 is fixed to the positioning groove, and at least a portion of the thermal sensing element 13 is adhered and fixed to the positioning groove.

[0051] The thermal sensing element 13 is a connecting piece made of a thermal fuse.

[0052] Example 3: This example 3 is not illustrated. The difference from Example 2 is that the sensing element includes a second connector and a thermal sensor. The second connector is connected to the first cable. One end of the thermal sensor is connected to the second connector, and the other end is fixed to the power battery assembly.

[0053] In this application, the vehicle is also provided with a sleeve for housing the first cable 32, the second cable 35 and the third cable 37, so as to accommodate the corresponding cables, and the vehicle body is provided with a mounting bracket for fixing the sleeve.

[0054] This application also discloses a control method applied to the emergency device disclosed in this application, such as... Figure 3 As shown, the control methods include: The preset temperature is determined based on the safe temperature threshold of the power battery assembly; The system acquires temperature information from the power battery pack and controls the electric unlocking mechanism based on the temperature information and the status of the vehicle door. When the temperature of the power battery assembly rises to a preset temperature, the sensing element undergoes a preset shape change; The mechanical force generated by the change in shape drives the movement of mechanical conversion components.

[0055] This application sets a preset temperature based on the safety temperature threshold of the power battery pack and acquires the temperature information of the power battery pack in real time. Combined with the door status, it controls the operation of the electric unlocking mechanism. When the power battery temperature is normal, the door unlocks via the electric unlocking mechanism; when the power battery temperature is abnormal but has not yet reached the preset temperature, electric unlocking is achieved in advance, forming a pre-warning safety protection. When the power battery pack temperature rises to the preset temperature, the sensing element undergoes a preset shape change, and the mechanical force generated by this shape change drives the mechanical conversion component to operate. Thus, in conditions such as circuit failure or control abnormalities, the protection action is independently triggered by the mechanical structure, without relying on the electronic control system or power supply status, enabling the door to automatically or quickly and reliably unlock when the power battery temperature is abnormal.

[0056] The preset temperature is determined based on the safe temperature threshold of the power battery assembly, including: Obtain a pre-set safe temperature threshold for the power battery module. The safe temperature threshold is the highest safe temperature for the power battery module to operate normally, or the warning temperature at which the power battery module enters an overheating risk state. Determine the safe temperature threshold as the preset temperature. Alternatively, the preset temperature can be obtained by correcting the safe temperature threshold in combination with the thermal conductivity coefficient.

[0057] Controlling the electric unlocking mechanism based on temperature information and the door's status includes: When the temperature of the power battery pack is lower than the preset temperature, the door is closed, and the electric unlocking mechanism is activated according to the unlocking command. When the temperature of the power battery pack is greater than or equal to the preset temperature, the door is closed, and the electric unlocking mechanism is activated.

[0058] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0059] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0060] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. An emergency device for a vehicle, the vehicle using electrical energy as its driving power source, the vehicle including a drive motor and a power battery assembly providing electrical energy to the drive motor, the vehicle further including a door and a vehicle body, the door being operable to open and close relative to the vehicle body, characterized in that, The emergency device includes: A sensing element is disposed on the power battery assembly and configured to undergo a preset morphological change when the temperature of the power battery assembly rises to a preset temperature. The door lock mechanism includes a locking component for locking the door to the vehicle body, and an unlocking component for releasing the locking engagement. The unlocking component includes an electric unlocking component, an active unlocking component, and a mechanical unlocking component. A mechanical conversion component, which is in transmission cooperation with the sensing element, the mechanical unlocking element, and the power supply switch of the power battery assembly; When the sensor changes shape, the mechanical force generated by the change acts on the mechanical conversion component, triggering the mechanical conversion component to drive the mechanical unlocking component to perform an unlocking action through mechanical transmission, and to drive the power supply switch to disconnect, thereby cutting off the power supply output of the power battery assembly.

2. The emergency device for a vehicle according to claim 1, characterized in that, The morphological change occurs when the temperature of the sensing element reaches the preset temperature and it breaks. The mechanical conversion component includes an energy storage spring, which is connected to the sensing element via a first cable. When the sensing element breaks, the energy storage spring resets and drives the mechanical unlocking component to perform an unlocking action, as well as causing the power supply switch to disconnect.

3. The emergency device for a vehicle according to claim 2, characterized in that, The mechanical conversion component further includes a mounting component fixed to the vehicle body. The mounting component has a mounting hole for mounting the energy storage spring. The energy storage spring includes a fixed end fixedly connected to the mounting component and a movable end connected to the first cable.

4. The emergency device for a vehicle according to claim 3, characterized in that, The mounting component is provided with a guide hole communicating with the mounting hole and a movable component movably disposed in the guide hole. The movable component is connected to the moving end. The mechanical conversion component also includes a rotating component and a second cable. The rotating component is rotatably disposed on the vehicle body. One end of the second cable is connected to the rotating component, and the other end is connected to the mechanical unlocking component. The movement of the movable component can drive the rotating component to wind around the second cable to drive the mechanical unlocking component to perform an unlocking action.

5. The emergency device for a vehicle according to claim 4, characterized in that, The mechanical conversion component also includes a transmission rod, which is telescopically connected. One end of the transmission rod is connected to the rotating component, and the other end is rotatably connected to the moving component.

6. The emergency device for a vehicle according to claim 4, characterized in that, The locking assembly includes a latch and a lock body. The latch is disposed on the vehicle door, and the lock body is disposed on the vehicle body. The door lock mechanism also includes a power elastic element. The latch and the lock body cooperate to lock the vehicle door and enable the power elastic element to maintain an energy storage state. When the rotating member winds the second cable, the second cable can drive the mechanical unlocking member to release the engagement between the latch and the lock body, and at the same time release the energy stored in the power elastic element, so that the power elastic element drives the vehicle door to open.

7. The emergency device for a vehicle according to claim 6, characterized in that, The mechanical conversion component drives the power supply switch to disconnect via mechanical transmission. The vehicle body is provided with a positioning shaft, and the rotating component is rotatably mounted on the positioning shaft. The mechanical conversion component also includes a follower component rotatably mounted on the positioning shaft. The rotating component is connected to the follower component, and the follower component is connected to the power supply switch via a third cable. The rotation of the rotating component drives the follower component to wind around the third cable, thereby disconnecting the power supply switch.

8. The emergency device for a vehicle according to claim 7, characterized in that, The lock body is provided with a locking member that engages with the latch. The locking member is connected to the lock body via a reset elastic member. The locking member is rotatable relative to the vehicle body. The electric unlocking member includes a driving member that drives the locking member to rotate, thereby releasing the latch from the locking member. The reset elastic member is used to reset the locking member. The mechanical unlocking member includes a driving rod disposed below the locking member. The driving rod is rotatably disposed on the lock body. One end of the second cable is connected to the rotating member, and the other end is connected to the driving rod. The rotation of the rotating member drives the driving rod to rotate, and the driving rod abuts against the locking member, thereby disengaging the locking member from the latch.

9. An emergency device for a vehicle according to claim 2, characterized in that, The sensing element includes a first connector, a second connector, and a thermal sensor. The first connector and the second connector are connected through the thermal sensor. The first connector is connected to the power battery assembly, and the second connector is connected to the first cable. The thermal sensor is at least partially attached to the power battery assembly.

10. A control method applied to an emergency device of a vehicle according to any one of claims 1 to 9, characterized in that, Control methods include: The preset temperature is determined based on the safe temperature threshold of the power battery assembly; The temperature information of the power battery assembly is obtained, and the electric unlocking mechanism is controlled to operate based on the temperature information and the state of the vehicle door. When the temperature of the power battery assembly rises to the preset temperature, the sensing element undergoes a preset shape change; The mechanical conversion component is driven to move by the mechanical force generated by the shape change.

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