阅读说明：本技术 新能源汽车热失控自救系统及包括其的新能源汽车 (New energy automobile thermal runaway self-rescue system and new energy automobile comprising same ) 是由 宁强 庄英武 胡念明 于 2021-08-04 设计创作，主要内容包括：本申请提供一种新能源汽车热失控自救系统及包括其的新能源汽车,其自救系统包括：电池监控单元,用于监测动力电池包的状态数据,在状态数据表示动力电池包存在热失控风险时输出热失控信号；安装件,用于将动力电池包安装在车身上；安装件包括断裂执行部和控制部；控制部接收到热失控信号后,控制断裂执行部断开安装件,使动力电池包从车身脱落；移动小车,固定于动力电池包的底部；移动小车配置有电控单元和驱动机构；电控单元根据接收到的驱动信号控制驱动机构带动脱落的动力电池包移动。本申请的方案,能在车辆热失控的情况下使动力电池包脱离车身并将动力电池包转移,从而降低车身损毁程度,也能够确保车辆上人员的人身安全。(The application provides a new energy automobile thermal runaway system of saving oneself and including its new energy automobile, its system of saving oneself includes: the battery monitoring unit is used for monitoring the state data of the power battery pack and outputting a thermal runaway signal when the state data indicates that the thermal runaway risk exists in the power battery pack; the mounting piece is used for mounting the power battery pack on the vehicle body; the mounting piece comprises a fracture execution part and a control part; after the control part receives the thermal runaway signal, the control part controls the fracture execution part to break the mounting part, so that the power battery pack falls off from the vehicle body; the movable trolley is fixed at the bottom of the power battery pack; the movable trolley is provided with an electric control unit and a driving mechanism; the electric control unit controls the driving mechanism to drive the fallen power battery pack to move according to the received driving signal. The scheme of this application can make the power battery package break away from the automobile body and shift the power battery package under the condition of vehicle thermal runaway to reduce the automobile body damage degree, also can ensure personnel's personal safety on the vehicle.)

1. The utility model provides a new energy automobile thermal runaway system of saving oneself which characterized in that includes:

the battery monitoring unit is used for monitoring state data of the power battery pack and outputting a thermal runaway signal when the state data indicate that the power battery pack has a thermal runaway risk;

the mounting piece is used for mounting the power battery pack on the vehicle body; the mounting piece comprises a fracture execution part and a control part; the control part is connected with the battery monitoring unit, and after receiving the thermal runaway signal, the control part controls the fracture execution part to disconnect the mounting part, so that the power battery pack falls off from the vehicle body;

the mobile trolley is fixed at the bottom of the power battery pack; the movable trolley is provided with an electric control unit and a driving mechanism; and the electric control unit controls the driving mechanism to drive the fallen power battery pack to move according to the received driving signal.

2. The thermal runaway self-rescue system of the new energy automobile as claimed in claim 1, characterized in that:

the mounting piece is an explosive bolt, the fracture execution part is an explosive in the explosive bolt, and the detonation point of the explosive is connected with the control part;

and the control part provides an electric signal to the detonation point after receiving the thermal runaway signal so as to detonate the explosive.

3. The thermal runaway self-rescue system of the new energy automobile as claimed in claim 1, further comprising:

the positioning module is arranged on the movable trolley; the positioning module detects the real-time position of the mobile trolley and sends the real-time position to the vehicle-mounted controller;

the vehicle-mounted controller receives the thermal runaway signal sent by the battery monitoring unit, acquires image information of the environment where the vehicle body is located, and determines a target position according to the image information, wherein the target position is located in an obstacle-free area; the vehicle-mounted controller is also used for acquiring the real-time position and obtaining a planned path of the mobile trolley according to the target position and the real-time position;

and the electric control unit receives the planned path sent by the vehicle-mounted controller as the driving signal, and the driving mechanism drives the movable trolley to move to the target position according to the planned path.

4. The thermal runaway self-rescue system of the new energy automobile as claimed in claim 3, characterized in that:

and the vehicle-mounted controller is used for obtaining the image information according to the monitoring result of the vehicle-mounted laser radar on the environment where the vehicle body is located.

5. The new energy automobile thermal runaway self-rescue system as claimed in claim 4, characterized in that:

and a synchronous electronic map is arranged in the vehicle-mounted controller and the electric control unit, and the planned path is obtained according to the target position and the position of the real-time position in the electronic map.

6. The thermal runaway self-rescue system of the new energy automobile as claimed in claim 1, further comprising:

the remote controller is in communication connection with the electronic control unit; after the remote controller is operated, generating a driving signal containing a moving direction according to an operation result, and sending the driving signal to the electric control unit;

and the driving mechanism drives the movable trolley to move according to the moving direction.

7. The thermal runaway self-rescue system of the new energy automobile as claimed in claim 1, further comprising:

the elastic component is arranged between the vehicle suspension and the vehicle body, and the controlled end of the elastic component is in communication connection with the vehicle-mounted controller;

and after the vehicle-mounted controller acquires the thermal runaway signal, sending an action signal to a controlled end of the elastic component to enable the elastic component to jack the vehicle body to a preset height.

8. The thermal runaway self-rescue system for the new energy automobile as claimed in any one of claims 1 to 7, characterized in that:

the battery monitoring unit is used for monitoring the temperature value, the gas concentration value, the pressure value and/or the power supply current value of the power battery pack as the state data;

and the battery monitoring unit outputs the thermal runaway signal when the state data is not in a preset standard range.

9. The thermal runaway self-rescue system of the new energy automobile as claimed in claim 8, further comprising:

the backup battery module is arranged in the trunk, and the output end of the backup battery module is connected with the power supply end of the vehicle accessory through a backup switch;

the triggering end of the standby switch is connected with the vehicle-mounted controller;

and the vehicle-mounted controller triggers the standby switch to be conducted after acquiring the thermal runaway signal.

10. A new energy automobile, which is characterized by comprising the thermal runaway self-rescue system of the new energy automobile as claimed in any one of claims 1 to 9.

Technical Field

The application relates to the technical field of new energy automobile power battery system design, in particular to a new energy automobile thermal runaway self-rescue system and a new energy automobile comprising the same.

Background

For a new energy automobile using a high voltage battery as a power source, the safety problem of the new energy automobile is receiving more and more attention.

At present, once a new energy automobile is in a fire self-ignition condition, the new energy automobile can only wait for a fire fighter to rescue before, and a power battery can explode in the waiting process, so that the new energy automobile can be seriously burnt and scrapped, and in some conditions, when the damage degree of the new energy automobile is serious, the fire reason is difficult to investigate, and the technical support is difficult to provide for the research and development design of the subsequent new energy automobile.

Disclosure of Invention

The application aims at providing a new energy automobile thermal runaway self-rescue system and a new energy automobile comprising the same to solve the problems of loss and potential safety hazard which are possibly caused when a power battery of the new energy automobile is thermally runaway in the prior art.

Therefore, some embodiments of the present application provide a new energy automobile thermal runaway self-rescue system, including:

the battery monitoring unit is used for monitoring state data of the power battery pack and outputting a thermal runaway signal when the state data indicate that the power battery pack has a thermal runaway risk;

the mounting piece is used for mounting the power battery pack on the vehicle body; the mounting piece comprises a fracture execution part and a control part; the control part is connected with the battery monitoring unit, and after receiving the thermal runaway signal, the control part controls the fracture execution part to disconnect the mounting part, so that the power battery pack falls off from the vehicle body;

the mobile trolley is fixed at the bottom of the power battery pack; the movable trolley is provided with an electric control unit and a driving mechanism; and the electric control unit controls the driving mechanism to drive the fallen power battery pack to move according to the received driving signal.

In some embodiments of the system for self rescue from thermal runaway of a new energy automobile, the mounting member is an explosive bolt, the fracture execution part is an explosive inside the explosive bolt, and a detonation point of the explosive is connected with the control part;

and the control part provides an electric signal to the detonation point after receiving the thermal runaway signal so as to detonate the explosive.

The new energy automobile thermal runaway system of saving oneself in some embodiments of this application still includes:

the positioning module is arranged on the movable trolley; the positioning module detects the real-time position of the mobile trolley and sends the real-time position to the vehicle-mounted controller;

the vehicle-mounted controller receives the thermal runaway signal sent by the battery monitoring unit, acquires image information of the environment where the vehicle body is located, and determines a target position according to the image information, wherein the target position is located in an obstacle-free area; the vehicle-mounted controller is also used for acquiring the real-time position and obtaining a planned path of the mobile trolley according to the target position and the real-time position;

and the electric control unit receives the planned path sent by the vehicle-mounted controller as the driving signal, and the driving mechanism drives the movable trolley to move to the target position according to the planned path.

In some embodiments of the present application, the new energy automobile thermal runaway self-rescue system includes an on-vehicle controller, which is configured to obtain the image information according to a monitoring result of an on-vehicle laser radar on an environment where an automobile body is located.

In some embodiments of the system for self-rescue from new energy vehicle in thermal runaway, the vehicle-mounted controller and the electric control unit are internally provided with a synchronous electronic map, and the planned path is obtained according to the target position and the position of the real-time position in the electronic map.

The new energy automobile thermal runaway system of saving oneself in some embodiments of this application still includes:

the remote controller is in communication connection with the electronic control unit; after the remote controller is operated, generating a driving signal containing a moving direction according to an operation result, and sending the driving signal to the electric control unit;

and the driving mechanism drives the movable trolley to move according to the moving direction.

The new energy automobile thermal runaway system of saving oneself in some embodiments of this application still includes:

the elastic component is arranged between the vehicle suspension and the vehicle body, and the controlled end of the elastic component is in communication connection with the vehicle-mounted controller;

and after the vehicle-mounted controller acquires the thermal runaway signal, sending an action signal to a controlled end of the elastic component to enable the elastic component to jack the vehicle body to a preset height.

In some embodiments of the system for self-rescue from thermal runaway of a new energy vehicle, the battery monitoring unit monitors a temperature value, a gas concentration value, a pressure value and/or a power supply current value of the power battery pack as the state data;

and the battery monitoring unit outputs the thermal runaway signal when the state data is not in a preset standard range.

The new energy automobile thermal runaway system of saving oneself in some embodiments of this application still includes:

the backup battery module is arranged in the trunk, and the output end of the backup battery module is connected with the power supply end of the vehicle accessory through a backup switch;

the triggering end of the standby switch is connected with the vehicle-mounted controller;

and the vehicle-mounted controller triggers the standby switch to be conducted after acquiring the thermal runaway signal.

Some embodiments of this application still provide a new energy automobile, include any one above scheme the new energy automobile thermal runaway system of saving oneself.

Compared with the prior art, the technical scheme provided by the embodiment of the application has at least the following beneficial effects:

the new energy automobile thermal runaway system that saves oneself that this application embodiment provided and including its new energy automobile installs the power battery package on the automobile body through the installed part that can be disconnected, through battery monitoring unit monitoring power battery package. If the new energy automobile has the situation of spontaneous combustion and fire, the battery monitoring unit outputs a thermal runaway signal, the thermal runaway signal enables a fracture execution part in the mounting piece to break the mounting piece, and the power battery pack breaks away from the automobile body after the thermal runaway signal is broken. Through set up travelling car in power battery package bottom, can shift power battery package behind power battery package breaks away from the automobile body, avoid power battery package to cause the explosion under the thermal runaway's the condition to reduce new energy automobile's damage degree, no matter the car owner is on the car, can both ensure its personal safety.

Drawings

Fig. 1 is a structural block diagram of a thermal runaway self-rescue system of a new energy automobile according to an embodiment of the application;

fig. 2 is a layout mode of a thermal runaway self-rescue system of a new energy automobile in the automobile according to an embodiment of the application;

FIG. 3 is a schematic diagram of a state in which the power battery pack is detached from the vehicle body after thermal runaway;

fig. 4 is a structural block diagram of a thermal runaway self-rescue system of a new energy automobile according to another embodiment of the application;

fig. 5 is a schematic diagram of a working process of the thermal runaway self-rescue system of the new energy automobile according to an embodiment of the application.

Detailed Description

The embodiments of the present application will be further described with reference to the accompanying drawings. In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present application, and do not indicate or imply that the device or component being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. In the following embodiments provided in the present application, unless mutually contradictory, different technical solutions may be mutually combined, and technical features thereof may be mutually replaced.

The embodiment provides a thermal runaway self-rescue system for a new energy automobile, which is shown in fig. 1-3 and comprises a battery monitoring unit 11, a mounting piece 2 and a mobile trolley 3. The battery monitoring unit 11 is configured to monitor state data of the power battery pack 1, and the battery monitoring unit 11 outputs a thermal runaway signal when the state data indicates that the power battery pack 1 has a thermal runaway risk; the mounting piece 2 is used for mounting the power battery pack 1 on a vehicle body, and the mounting piece 2 comprises a control part 21 and a fracture execution part 22; the control unit 21 is connected to the battery monitoring unit 11, and after receiving the thermal runaway signal, the control unit 21 controls the fracture execution unit 22 to disconnect the mounting device 2, so that the power battery pack 1 falls off from the vehicle body; the mobile trolley 3 is fixed at the bottom of the power battery pack 1, as shown in fig. 3, when the power battery pack 1 falls off, the power battery pack 1 and the mobile trolley 3 fall on the ground in a free mode; the moving trolley 3 is provided with an electric control unit 31 and a driving mechanism 32; the electronic control unit 31 controls the driving mechanism 32 to drive the detached power battery pack 1 to move according to the received driving signal.

In the above configuration, the power battery pack 1 is mounted on the vehicle body by the mounting tool 2 that can be disconnected, and the state of the power battery pack 1 is monitored by the battery monitoring unit 11. If the new energy automobile has the situation of spontaneous combustion and fire, the battery monitoring unit 11 can automatically detect the thermal runaway risk and output a thermal runaway signal, the thermal runaway signal can enable the fracture execution part 22 in the mounting piece 2 to break the mounting piece 2, and the power battery pack 1 is separated from the automobile body after the thermal runaway signal is broken. Through set up travelling car 3 in power battery package 1 bottom, can break away from the automobile body at power battery package 1 after with power battery package 1 transfer, avoid power battery package 1 to cause the explosion under the thermal runaway's the condition to reduce automobile body damage degree, also can ensure personnel's personal safety on the vehicle.

The battery monitoring unit 11 may be a newly added module, or may be implemented directly by using a battery management system BMS, and in this embodiment, the BMS is preferably used as the battery monitoring unit. In the current new energy automobile, a plurality of sensors are already configured in the power battery pack 1 to detect the state of the power battery pack 1, such as the cell temperature, the internal pressure of the power battery pack, the supply current or the voltage, and the BMS can predict whether the power battery pack has a thermal runaway risk according to data detected by the existing sensors. Specifically, in some embodiments, the battery monitoring unit 11 monitors a temperature value, a gas concentration value, a pressure value, and/or a power supply current value of the power battery pack 1 as the status data; when the state data is not within the preset standard range, the battery monitoring unit 11 outputs the thermal runaway signal, and the standard range corresponding to each parameter may be stored in the battery monitoring unit 11 in advance.

The movable carriage 3 may be implemented by an existing AGV (automated Guided vehicle) remote-controlled carriage equipped with an electromagnetic or optical automatic navigation device and capable of traveling along a predetermined navigation path. The driving signal received by the electronic control unit 31 may be a driving signal transmitted from an external remote controller, or may be a driving signal transmitted from an onboard controller. The driving signal is used for providing a moving direction for the moving trolley 3, so that the moving trolley can be moved to a position far away from the current vehicle which is in fire, and meanwhile, the surrounding vehicle, charging equipment or personnel and the like cannot be injured as far as possible. Moreover, the movable trolley 3 is fixed at the bottom of the power battery pack 1, and can physically protect the power battery pack 1 to prevent the impact of hard ground objects on the power battery pack 1.

Installation spare 2 in above scheme can adopt self-destruction formula structure to realize or the structure that possesses the electronic lock function realizes, and its purpose can break off the connection of power battery package 1 and automobile body when new energy automobile appears the dangerous condition of thermal runaway, makes power battery package 1 and automobile body separation. In some embodiments of the present application, the mounting member 2 may be an explosive bolt, the fracture performing part 22 is an explosive inside the explosive bolt, a detonation point of the explosive is connected to the control part 21, and the control part 21 may be implemented as an MCU unit, a PLC unit, or the like. The control part 21 provides an electric signal to the detonation point after receiving the thermal runaway signal, so as to detonate the explosive. The structure of explosion bolt is comparatively ripe, simple to operate, when using in this scheme, can with power battery package 1 originally the conventional bolt of using directly change for the explosion bolt can, need not to change other structures of automobile body.

In some embodiments, as shown in fig. 4, the thermal runaway self-rescue system of the new energy vehicle may further include a positioning module 33. The positioning module 33 is arranged on the moving trolley 3; the positioning module 33 detects the real-time position of the mobile trolley 3 and sends it to the onboard controller 12. After receiving the thermal runaway signal sent by the battery monitoring unit 11, the on-board controller 12 obtains image information of an environment where a vehicle body is located, and determines a target position according to the image information, wherein the target position is located in an obstacle-free area; the onboard controller 12 is further configured to obtain a real-time position of the mobile cart 3 sent by the positioning module 33, and obtain a planned path of the mobile cart 3 according to the target position and the real-time position; the electronic control unit 31 receives the planned path sent by the onboard controller 12 as the driving signal, and the driving mechanism 32 drives the mobile cart 3 to move to the target position according to the planned path. Referring to fig. 2 and 3, after the traveling car 3 is detached from the car body, the traveling car 3 is moved to a safe place as soon as possible in order to secure the safety of the vehicles, the charging equipment, or the personnel around the thermal runaway vehicle. Since the vehicle-mounted controller 12 can determine the conditions of the surroundings of the vehicle from various detection sensors, cameras, and other devices mounted on the vehicle during driving, it can recognize which positions in the surroundings have obstacles and which positions are clear safe places as soon as possible, and can select a safe target position from an obstacle-free area immediately. Therefore, a moving path can be planned for the moving trolley 3 in advance, so that the moving trolley 3 can bypass the obstacle and reach the target position as soon as possible by the optimal path.

In some aspects, the vehicle-mounted controller 12 is configured to obtain the image information according to a monitoring result of the vehicle-mounted laser radar 6 on the environment where the vehicle body is located. The vehicle-mounted laser radar 6 is a commonly used monitoring device in an automobile, the technical means of image processing and analysis of the monitoring result of the vehicle-mounted laser radar 6 by the vehicle-mounted controller 12 is mature, and the target position can be accurately and efficiently found by adopting the scheme. In some schemes, a synchronous electronic map is built in the vehicle-mounted controller 12 and the electronic control unit 31, and the planned route is obtained according to the target position and the position of the real-time position in the electronic map, so that the mobile car 3 can be ensured to accurately realize automatic navigation, and can be driven to a safe target position along the planned route without manual intervention.

In addition to automatically planning the moving path of the moving trolley 3 through the onboard controller 12, the remote controller may be operated by the vehicle owner to remotely control the moving trolley 3 to move the detached power battery pack 1 to a safe place. Therefore, in some embodiments, the thermal runaway self-rescue system of the new energy vehicle may further include a remote controller, and the remote controller is in communication connection with the electronic control unit 31; after the remote controller is operated, generating a driving signal containing a moving direction according to an operation result, and sending the driving signal to the electric control unit 31; the driving mechanism 32 drives the moving trolley 3 to move according to the moving direction. If the dangerous condition of thermal runaway occurs to the vehicle, the vehicle owner can leave the carriage in time, and then the remote controller is operated to remotely control the movable trolley 3 to be away from the thermal runaway vehicle as soon as possible. The remote controller can be provided with an operating handle or a key and the like, so that the visual field range of the vehicle owner is larger, and the vehicle owner can change the position, thereby enlarging the movable range of the movable trolley 3.

As shown in fig. 2 to 4, in some vehicles, an elastic member 4 is further provided, and the elastic member 4 is disposed between a suspension and a vehicle body of the vehicle. In some embodiments of the present application, the controlled end of the elastic component 4 may be in communication with the vehicle-mounted controller 12; after acquiring the thermal runaway signal, the vehicle-mounted controller 12 sends an action signal to the controlled end of the elastic component 4, so that the elastic component 4 jacks up the vehicle body to a preset height, and the preset height may be 10-20cm and the like. The elastic component 4 can be an air spring or a driving stabilizer bar which is equipped for the vehicle, after the air spring or the driving stabilizer bar jacks the vehicle body, the distance between the power battery pack 1 and the vehicle body can be increased, the space at the lower part of the vehicle body is increased, and the movable trolley 3 is convenient to move away from the vehicle out of control due to heat from the front direction, the rear direction, the left direction and the right direction.

In some embodiments, as shown in fig. 2 to fig. 4, the system for self rescue from thermal runaway of a new energy automobile further includes a backup battery module 5 disposed in the trunk, and an output end of the backup battery module 5 is connected to a power supply end of a vehicle accessory 14 through a backup switch 13; the triggering end of the standby switch 13 is connected with the vehicle-mounted controller 12; the vehicle-mounted controller 12 triggers the standby switch 13 to be turned on after acquiring the thermal runaway signal. The standby battery module 5 can be a 48v battery pack, and by arranging the standby battery module 5, after the power battery pack 1 is separated from the vehicle body, power can be continuously supplied to vehicle accessories 14 (low-voltage electrical appliances, such as an air spring, a VCU, a vehicle-mounted laser radar, a vehicle-mounted large screen and a T-BOX) and the like, so that normal operation of the vehicle accessories is ensured.

Taking the working process of the thermal runaway self-rescue system shown in fig. 4 and 5 as an example, when the thermal runaway condition occurs in the vehicle, the self-rescue system realizes self-rescue:

s1: the battery monitoring unit 11 monitors that the power battery pack 1 has a thermal runaway risk. For example, when the BMS monitors that the battery cell or the module is abnormal and the state data (temperature, gas concentration, pressure, control signal, and other parameters) exceed the safety threshold, the battery monitoring unit 11 sends a thermal runaway signal.

S2: the breaking performing part 22 in the mounting 2 breaks the mounting 2 to detach the power pack 1 from the vehicle body.

S3: the moving trolley 3 and the fallen power battery pack 1 fall to the ground freely, and the positioning module 33 on the moving trolley 3 sends the real-time position of the moving trolley 3 to the vehicle-mounted controller 12.

S4: the vehicle-mounted controller 12 also receives the thermal runaway signal sent by the battery monitoring unit 11, and controls the elastic component 4 to jack up the vehicle body.

S5: the vehicle-mounted laser radar 6 monitors an image of an environment where the vehicle body is located, and sends an image in which the positions of obstacles around the vehicle body and an obstacle-free area are recorded to the vehicle-mounted controller 12.

S6: the vehicle-mounted controller 12 obtains a target position according to the environment image, and obtains a planned path of the mobile trolley 3 according to the target position and the real-time position of the mobile trolley 3.

S7: the onboard controller 12 sends the planned path to the electronic control unit 31 of the mobile cart 3, and then the electronic control unit 31 controls the driving mechanism 32 to drive the mobile cart 3 to move the dropped power battery pack 1 to the target position.

After that, the owner or surrounding personnel can make a fire alarm call for help.

In some embodiments of the application, a new energy automobile is provided, which includes the thermal runaway self-rescue system of the new energy automobile according to any one of the above aspects. The new energy automobile of this embodiment, after the problem that thermal runaway appears, control power battery package and break away from the automobile body rapidly and transfer to safe target location, no matter the car owner is not on the car this moment, after thermal runaway's power battery package kept away from the automobile body, the people's safety of car owner can all be ensured. Meanwhile, after the power battery pack with thermal runaway is removed, other parts of the vehicle body cannot be affected by explosion, and the damage degree of the vehicle body is reduced. Because the power battery pack is moved to an open position, the safety of surrounding vehicles and facilities can be ensured, and secondary damage and additional loss are reduced. In addition, after power battery package and automobile body separation, the ignition and the reason of firing can be surveyed more easily, and technical staff can be quick judgement is that the inside thermal management system of power battery package has gone wrong, still the pencil short circuit of vehicle leads to the appearance of the vehicle thermal runaway condition, because vehicle itself and on-vehicle electrical apparatus are intact, it can be more convenient to survey and collect evidence.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.