A new energy vehicle rescue method and system based on battery pack thermal runaway early warning

Abstract

This invention relates to the field of new energy vehicle safety technology and discloses a new energy vehicle rescue method and system based on battery pack thermal runaway early warning. The method includes: acquiring battery pack early warning data, vehicle status data, and rescue operation data; determining the battery pack risk evolution state and determining the towing safety window and towing exposure time; comparing the towing safety window and towing exposure time, and generating a towing disposal instruction based on the battery pack early warning data; generating a towing operation token when the instruction is a towing permission instruction or a distance-limited vehicle relocation instruction, and controlling the operation authority of the rescue vehicle's towing device; re-determining the towing safety window and towing exposure time when entering the vehicle's receiving range or in an operation preparation state; and re-determining the towing safety window and towing exposure time if the re-determined towing exposure time is not met, revoking the towing operation token, and adjusting the instruction. This application improves the safety and controllability of road rescue operations in thermal runaway early warning scenarios.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle safety technology, and more specifically, to a new energy vehicle rescue method and system based on battery pack thermal runaway early warning. Background Technology

[0002] With the continuous increase in the number of new energy vehicles, power battery packs have become a core component of vehicle safety protection. Battery packs may enter a thermal runaway process under conditions such as collisions, overcharging, abnormal thermal management, insulation abnormalities, or internal short circuits. Early warning signs typically include abnormal temperature, abnormal pressure, smoke or flammable gas emission, and abnormal high-voltage system status. Existing vehicles can usually collect, alarm, and provide emergency alerts for battery pack anomalies through battery management systems, vehicle networking terminals, and backend platforms, and send information such as vehicle location and warning status to the owner, maintenance personnel, or roadside assistance services. However, due to the rapid development, short response window, and high risk of contact during rescue operations associated with thermal runaway, simply issuing alarms is insufficient to fully meet the safety requirements of roadside assistance for new energy vehicles. Therefore, how to achieve technical linkage between vehicle warning information and the actual operation of rescue vehicles has become a crucial issue in the field of collaborative efforts between new energy vehicle battery safety and roadside assistance.

[0003] In existing technologies, Chinese invention patent application CN118244126A, "A Method and System for Detecting New Energy Vehicle Batteries Based on Integrated Sensors," collects battery data through a sensor network, predicts battery temperature changes, and disconnects the battery connection, stops charging and discharging, and rapidly cools it in high-risk conditions. Simultaneously, it automatically notifies roadside assistance services and battery maintenance teams, providing vehicle location and status. However, its focus is on battery anomaly identification and notification response after warnings. In scenarios where a new energy vehicle has triggered a battery pack thermal runaway warning but no obvious open flame has yet appeared, rescue platforms and vehicles tend to follow the rescue procedures for ordinary faulty vehicles. If the vehicle's battery pack condition continues to deteriorate before the arrival of the rescue vehicle or during the rescue operation, the rescue vehicle may still continue to tow, load, or transport the vehicle away, leading to close exposure of rescue personnel, increased risk during vehicle transport, or the vehicle being taken to an unsuitable location for isolation and disposal. Therefore, there is still a problem of insufficient connection between battery pack warning information and rescue vehicle operation access control, making it difficult to timely constrain the actual operating behavior of the rescue vehicle's towing device based on changes in vehicle risk, affecting the safety and controllability of roadside assistance in new energy vehicle thermal runaway warning scenarios.

[0004] Therefore, it is necessary to design a new energy vehicle rescue method and system based on battery pack thermal runaway early warning to solve the problems existing in the current technology. Summary of the Invention

[0005] In view of this, the present invention proposes a new energy vehicle rescue method and system based on battery pack thermal runaway early warning, aiming to solve the problem of insufficient connection between battery pack thermal runaway early warning information and rescue vehicle towing operation access control.

[0006] This invention proposes a rescue method for new energy vehicles based on battery pack thermal runaway early warning, comprising: Acquire battery pack early warning data, vehicle status data, and rescue operation data for new energy vehicles; The battery pack risk evolution status is determined based on the battery pack warning data, and the towing safety window for the vehicle to progress from the current warning status to the towing prohibition status is determined. The towing exposure time is determined based on the vehicle status data and the rescue operation data; The towing safety window and the towing exposure time are compared, and a towing disposal instruction is generated in combination with the battery pack warning data. When the towing disposal instruction is a towing permission instruction or a distance-limited vehicle movement instruction, a towing operation token is generated, and the operation permission of the rescue vehicle's towing device is controlled according to the towing operation token. When the rescue vehicle enters the vehicle's receiving range, or the towing device changes to the work-ready state, the towing safety window and towing exposure time are redefined. If the redefined towing safety window does not meet the redefined towing exposure time, the towing operation token is revoked, and the towing permission instruction is adjusted to a distance-limited vehicle movement instruction or a towing prohibition instruction, or the distance-limited vehicle movement instruction is adjusted to a towing prohibition instruction.

[0007] Furthermore, the battery pack warning data includes temperature change data, pressure change data, smoke concentration data, combustible gas concentration data, insulation status data, and high-voltage electrical status data; the vehicle status data includes vehicle location and vehicle mobility status; and the rescue operation data includes rescue vehicle location, towing device status, loading and fixing time, and isolated parking location.

[0008] Furthermore, determining the towing safety window includes: determining the risk deterioration rate based on the temperature change data, pressure change data, smoke concentration data, and combustible gas concentration data; and determining the towing safety window based on the risk deterioration rate, insulation status data, and high-voltage electrical status data.

[0009] Furthermore, determining the drag exposure time includes: The preparation time for receiving the vehicle is determined based on the vehicle's location, the rescue vehicle's location, and the vehicle's mobility status. The time required to complete the transfer is determined based on the fixed loading time and the isolated parking location. The time taken to prepare for receiving the vehicle and the time taken to complete the transfer are combined as the towing exposure time.

[0010] Furthermore, when generating drag-and-drop instructions, the following are included: When the towing safety window covers the towing exposure time, and the insulation status data and the high-voltage power-off status data meet the towing conditions, a towing permission command is generated; When the towing safety window does not cover the towing exposure time but covers the time required for the vehicle to move out of the current dangerous position, a distance-limited vehicle relocation command is generated. When the conditions for generating the towing permission command and the distance-limited vehicle movement command are not met, a towing prohibition command is generated.

[0011] Furthermore, the towing operation token includes: a token validity period, a permitted operation type, and a permitted operation range; within the token validity period, and when the towing device status meets the permitted operation type and the rescue vehicle towing device is within the permitted operation range, the operation permission of the rescue vehicle towing device is granted; otherwise, the operation permission of the rescue vehicle towing device is deactivated.

[0012] Furthermore, the permitted operation types include towing connection, distance movement, loading and securing, and transfer and departure; the towing operation token includes towing connection permission, distance movement permission, loading and securing permission, and transfer and departure permission associated with the permitted operation types; When the towing disposal instruction is a distance-limited vehicle relocation instruction, the towing operation token only includes towing connection permission and distance-limited movement permission, and the permitted operation range is limited to the movement range determined by the distance-limited vehicle relocation instruction.

[0013] Furthermore, the towing device status includes operation preparation status, towing connection status, distance-limited movement status, loading and fixing status, and transfer and departure status; before the rescue vehicle towing device enters the towing connection status, distance-limited movement status, loading and fixing status, or transfer and departure status, it verifies whether the towing operation token has towing connection permission, distance-limited movement permission, loading and fixing permission, or transfer and departure permission.

[0014] Furthermore, verifying the drag-and-drop operation token includes: If the towing command is a towing prohibition command, or if there is no valid towing operation token, then the operation permission of the rescue vehicle's towing device will be closed; If the towing disposal instruction is changed from a towing permission instruction to a distance-limited movement instruction, the original towing operation token is revoked, and a new towing operation token including a towing connection permission and a distance-limited movement permission is generated, and the permitted operation range is limited to the movement range determined by the distance-limited movement instruction; If the rescue vehicle towing device requests to enter an unauthorized towing device state, or if the rescue vehicle towing device exceeds the permitted operating range, the operating permission of the rescue vehicle towing device is revoked, and the rescue vehicle towing device is kept in the operating ready state.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: It determines the towing safety window when a vehicle progresses from its current warning state to a state where towing is prohibited by using battery pack warning data; it then determines the towing exposure time using vehicle status data and rescue operation data. This ensures that rescue decisions are no longer based solely on whether the vehicle is under warning or the distance of the rescue vehicle, but rather on generating instructions based on the matching relationship between the rate of battery pack risk deterioration and the actual towing operation time. When towing or limited-distance movement is permitted, the operation authority of the rescue vehicle's towing device is controlled by a towing operation token. This ensures that operations such as towing connection, limited-distance movement, loading and securing, and transfer are constrained by the token, preventing the rescue vehicle from operating according to the normal faulty vehicle procedure when the risk state is no longer suitable for continued towing. Simultaneously, when the rescue vehicle approaches the vehicle or the towing device enters the operation preparation state, the towing safety window and towing exposure time are redefined, and the towing operation token is revoked and the handling authority is reduced when conditions are not met. The above measures can reduce the probability of rescuers coming into close contact with high-risk battery packs, reduce the risk of thermal runaway exacerbation, smoke, reignition or high voltage abnormalities during vehicle loading, securing and transport, and prevent high-risk vehicles from being mistakenly towed into repair shops, parking lots or other locations unsuitable for isolation and disposal, thereby improving the safety, real-time performance and controllability of road rescue operations in the context of thermal runaway early warning for new energy vehicles.

[0016] On the other hand, this application also provides a new energy vehicle rescue system based on battery pack thermal runaway early warning, used to apply the above-mentioned new energy vehicle rescue method based on battery pack thermal runaway early warning, including: The data acquisition unit is used to acquire battery pack early warning data, vehicle status data, and rescue operation data of new energy vehicles; The processing unit is used to determine the risk evolution state of the battery pack based on the battery pack warning data, and to determine the towing safety window when the vehicle evolves from the current warning state to the towing prohibition state. The processing unit is also configured to determine the towing exposure time based on the vehicle status data and the rescue operation data; The judgment unit is used to compare the towing safety window and the towing exposure time, and generate a towing disposal instruction in combination with the battery pack warning data. When the towing disposal instruction is a towing permission instruction or a distance-limited vehicle movement instruction, a towing operation token is generated, and the operation permission of the rescue vehicle towing device is controlled according to the towing operation token. The adjustment unit is used to re-determine the towing safety window and towing exposure time when the rescue vehicle's location enters the vehicle's receiving range or the towing device's status changes to the work preparation state; if the re-determined towing safety window does not meet the re-determined towing exposure time, the towing operation token is revoked and the towing permission instruction is adjusted to a distance-limited vehicle movement instruction or a towing prohibition instruction, or the distance-limited vehicle movement instruction is adjusted to a towing prohibition instruction.

[0017] It is understandable that the above-mentioned new energy vehicle rescue methods and systems based on battery pack thermal runaway early warning have the same beneficial effects, and will not be elaborated further here. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart of a new energy vehicle rescue method based on battery pack thermal runaway early warning provided in an embodiment of the present invention; Figure 2 This is a flowchart of the dragging disposal instruction generation and dragging operation token verification process provided in an embodiment of the present invention; Figure 3 This is a functional block diagram of a new energy vehicle rescue system based on battery pack thermal runaway early warning, provided in an embodiment of the present invention. Detailed Implementation

[0019] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] In some embodiments of this application, see Figure 1-2 As shown, this application proposes a new energy vehicle rescue method based on battery pack thermal runaway early warning, including: S100: Acquires battery pack warning data, vehicle status data, and rescue operation data for new energy vehicles.

[0021] S200: Determines the risk evolution status of the battery pack based on battery pack warning data, and determines the safe towing window for the vehicle to progress from the current warning status to a towing-prohibited status.

[0022] S300: Determine the towing exposure time based on vehicle status data and rescue operation data.

[0023] S400: Compares the towing safety window and towing exposure time, and generates a towing disposal command based on the battery pack warning data. When the towing disposal command is a towing permission command or a distance-limited vehicle movement command, a towing operation token is generated, and the operation permission of the rescue vehicle's towing device is controlled according to the towing operation token.

[0024] S500: When the rescue vehicle enters the receiving range of the vehicle location, or the towing device status changes to the work-ready state, the towing safety window and towing exposure time are redefined. If the redefined towing safety window does not meet the redefined towing exposure time, the towing operation token is revoked, and the towing permission instruction is adjusted to a distance-limited vehicle movement instruction or a towing prohibition instruction, or the distance-limited vehicle movement instruction is adjusted to a towing prohibition instruction.

[0025] Specifically, this embodiment provides a new energy vehicle rescue method based on battery pack thermal runaway early warning. It is applicable to road rescue operations when a new energy vehicle triggers a battery pack thermal runaway early warning in scenarios such as roads, parking lots, charging stations, or service areas, but before a significant open flame has formed. The new energy vehicle executes the method of this embodiment through data interaction between the battery management system, vehicle controller, vehicle network terminal, and rescue platform. The operating status of the rescue vehicle's towing device is obtained through the rescue vehicle's own traction control interface, hydraulic execution feedback, winch start / stop feedback, towing arm position feedback, or operation switch status. It should be noted that the improvement focus of this application is not on the hardware structure of the battery management system, vehicle network terminal, or the rescue vehicle's towing device itself, but rather on the linkage control between the battery pack thermal runaway early warning data and the rescue towing operation authorization.

[0026] Before conducting a rescue operation, acquire battery pack warning data, vehicle status data, and rescue operation data for the new energy vehicle. Battery pack warning data includes temperature change data, pressure change data, smoke concentration data, combustible gas concentration data, insulation status data, and high-voltage energization status data. Temperature change data may include the highest temperature inside the battery pack, the temperature rise trend, the temperature difference between cells, and the temperature change amplitude within a preset observation period. Pressure change data may include the pressure value inside the battery pack and the pressure rise trend. Smoke concentration data and combustible gas concentration data are used to characterize whether the battery pack exhibits gas evolution, smoke emission, or an increasing trend of internal side reactions. Insulation status data characterizes the insulation safety level of the high-voltage system to the vehicle body or chassis. High-voltage energization status data characterizes whether the vehicle's high-voltage circuit has been successfully disconnected or whether there are abnormalities such as energization failure or relay sticking. Vehicle status data includes vehicle location and vehicle mobility status. Vehicle location can be determined by onboard positioning data, road sign data, or parking lot positioning data. Vehicle mobility status can be determined based on gear position, braking status, steering status, drive system status, charging connection status, and vehicle fault status. The rescue operation data includes the location of the rescue vehicle, the status of the towing device, the loading and fixing time, and the isolation parking location. The loading and fixing time can be determined by the type of rescue vehicle, the vehicle's fault status, the loading method, and historical operation records. The isolation parking location is a pre-marked or selected location by the rescue platform that is suitable for temporarily parking vehicles at risk of heat.

[0027] When determining the battery pack risk evolution status based on battery pack warning data, a continuous observation period can be used for judgment. The continuous observation period can be set to 30 seconds, 60 seconds, or other time lengths determined according to vehicle model calibration data. If temperature change data, pressure change data, smoke concentration data, and combustible gas concentration data are all within a stable range during the continuous observation period, the battery pack risk evolution status can be determined as a low-speed evolution status. If at least one of the above data continuously rises, and the insulation status data or high-voltage electrical status data shows anomalies, the battery pack risk evolution status can be determined as an accelerated evolution status. If at least two of the temperature, pressure, smoke concentration, or combustible gas concentration data simultaneously show a continuous rise, or the high-voltage electrical status data indicates that the high-voltage circuit cannot be confirmed to be disconnected, the battery pack risk evolution status can be determined as an emergency evolution status. The risk deterioration rate can be determined based on the magnitude and direction of change of the above data during the continuous observation period. The threshold for judging the risk deterioration rate can be derived from the vehicle manufacturer's safety calibration data for the battery pack, existing alarm thresholds of the battery management system, historical thermal event records of the same model vehicle, and the safety margin settings of the rescue company for the handling process. The above threshold is not limited to a fixed value and can be calibrated according to the battery type, vehicle platform and battery pack layout in actual implementation.

[0028] In some embodiments, the rate of risk deterioration can be determined in a tiered manner. If temperature change data, pressure change data, smoke concentration data, and combustible gas concentration data do not show a sustained increase during a continuous observation period, or only experience a single short-term fluctuation before returning to a stable range, this is determined as the first rate of risk deterioration. If any of the above data types shows a sustained increase during a continuous observation period, and the insulation status data and high-voltage electrical status data are not simultaneously abnormal, this is determined as the second rate of risk deterioration. If two or more of the above data types show a sustained increase during a continuous observation period, or if any of the above data types shows an upward trend in two adjacent continuous observation periods, and the insulation status data or high-voltage electrical status data is abnormal, this is determined as the third rate of risk deterioration. The first, second, and third rates of risk deterioration represent, in order, an increase in the degree of battery pack risk deterioration. The above tiered thresholds can be jointly determined by the vehicle manufacturer's calibration values, battery management system alarm thresholds, historical thermal event data of the same model vehicle, and rescue safety margin, and written into the vehicle model parameter table of the rescue platform.

[0029] In this embodiment, a stable range refers to the fact that the changes in temperature, pressure, smoke concentration, and combustible gas concentration data within a continuous observation period do not exceed the corresponding stable threshold in the vehicle model parameter table. A continuous increase refers to multiple sampled values ​​of the same type of data changing in the direction of increasing risk within a continuous observation period, and the difference between the sampled value at the end of the continuous observation period and the initial sampled value exceeds the corresponding increase threshold in the vehicle model parameter table. A single short-term fluctuation refers to a sampled value of the same type of data exceeding the stable threshold only once within a continuous observation period, and then recovering to the stable range in subsequent sampling. Using these definitions, it is possible to distinguish between instantaneous sensor disturbances and actual risk deterioration of the battery pack, avoiding the direct generation of towing and disposal instructions with higher risk constraints based solely on a single sampling anomaly.

[0030] When determining the towing safety window, the battery pack risk evolution status, risk deterioration rate, insulation status data, and high-voltage power-off status data are used together. The towing safety window refers to the available time range during which corresponding rescue towing operations are still permitted before the vehicle evolves from its current warning state to a prohibited towing state. A prohibited towing state refers to a battery pack risk state where further towing, limited-distance movement, loading and securing, or transfer from the site is not allowed. Examples include a continuous and rapid increase in battery pack temperature or pressure, a continuous increase in smoke or combustible gas concentration, insulation status not meeting high-voltage safety requirements, inability to confirm the high-voltage power-off status, or the battery management system having already issued a severe thermal event alarm. If the battery pack risk evolution status is in a low-speed evolution state, and both insulation status data and high-voltage power-off status data meet the towing conditions, the towing safety window can be set to a longer duration. If the battery pack risk evolution status is in an accelerated evolution state, the towing safety window is correspondingly shortened. If the battery pack risk evolution status is in an emergency evolution state, the towing safety window can be directly determined as not meeting the requirements for a complete towing operation.

[0031] In some embodiments, the towing safety window can be determined using a vehicle model parameter table. The vehicle model parameter table pre-records window reference values ​​for different battery pack risk evolution states, different risk deterioration rates, different insulation states, and different high-voltage energization states. When determining the towing safety window, a window reference value is first selected based on the battery pack risk evolution state and risk deterioration rate, and then corrected based on insulation state data and high-voltage energization state data. The window reference value is retained when the insulation state data meets the towing conditions and the high-voltage energization state data indicates that the high-voltage circuit has been successfully disconnected. The window reference value is shortened when the insulation state data is in a warning state or the high-voltage energization state data cannot confirm disconnection. The towing safety window is determined as not meeting the conditions for generating a towing permit when the insulation state data does not meet the high-voltage safety requirements or the high-voltage energization state data indicates a power-off failure. Through this process, the towing safety window is not a subjective experience value, but rather an operational time constraint jointly determined by the battery pack risk evolution state, risk deterioration rate, insulation state data, and high-voltage energization state data.

[0032] When determining the towing exposure time, the preparation time for receiving the vehicle and the time for completing the transfer are determined based on vehicle status data and rescue operation data. The preparation time for receiving the vehicle may include the estimated time for the rescue vehicle to travel from its current location to the vehicle's location, as well as the time required for the rescue vehicle to complete operational preparations and towing connection preparations after arrival. The time for completing the transfer may include the estimated time for vehicle towing connection, distance-limited movement, loading and securing, transfer to the isolated parking location, and unloading. If the vehicle's mobility status indicates that it can still move at low speed, the preparation time for receiving the vehicle can be determined using a simplified towing method. If the vehicle is immobile, in a charging connection state, or has a brake system malfunction, the preparation time for receiving the vehicle must include the time required to disconnect the charging connection, assist with towing, or secure the disabled vehicle. The farther the isolated parking location, or the worse the road conditions, the longer the time required to complete the transfer. The towing exposure time determined in this way is not the ordinary navigation time, but rather the operational exposure time for rescue personnel and the rescue vehicle's towing device under the influence of battery pack risks.

[0033] In some embodiments, the towing exposure time is the sum of the vehicle preparation time, the transfer completion time, and the operational safety margin. The vehicle preparation time includes the time required for the rescue vehicle to arrive at the vehicle's location and the time required for the rescue vehicle's towing device to transition from standby to operational readiness. The transfer completion time includes the time required for towing connection, distance-limited movement, loading and securing, transfer departure, and unloading. The operational safety margin is used to offset time deviations caused by traffic delays, connection failures, vehicle braking malfunctions, or repeated adjustments to the towing device. The operational safety margin can be determined based on the type of rescue vehicle, the number of rescue personnel, the level of road congestion, and the vehicle's fault condition. A towing safety window covering the towing exposure time means that the towing safety window is not shorter than the towing exposure time. A towing safety window not meeting the towing exposure time means that the towing safety window is shorter than the towing exposure time. If an operational safety margin is used, a towing safety window covering the towing exposure time means that the towing safety window is not shorter than the towing exposure time including the operational safety margin.

[0034] In this embodiment, the insulation status data meeting the towing conditions means that the vehicle has not output a high-voltage insulation fault alarm, or the insulation status data is within the preset safety range allowed by the vehicle manufacturer for rescue towing. The high-voltage power-off status data meeting the towing conditions means that the vehicle's high-voltage circuit has been completely disconnected, or the vehicle reports that the high-voltage main relay is disconnected and there is no relay sticking alarm. If the insulation status data does not meet the high-voltage safety requirements, or the high-voltage power-off status data indicates that the high-voltage circuit cannot be confirmed to be disconnected, no towing permission command will be generated. If the towing safety window still covers the time required for the vehicle to move out of the current dangerous position, a distance-limited vehicle movement command can be generated; otherwise, a towing prohibition command will be generated.

[0035] When comparing the towing safety window with the towing exposure time, if the towing safety window covers the towing exposure time and the insulation status data and high-voltage electrical status data meet the towing conditions, a towing permit is generated. The towing permit allows the rescue vehicle to perform towing connection, distance-limited movement, loading and securing, and transfer away within the permit's validity period and permitted operating range. If the towing safety window does not cover the complete towing exposure time but covers the time required for the vehicle to move out of the current hazardous location, a distance-limited vehicle relocation instruction is generated. The current hazardous location can be a driveway, charging parking space, densely populated parking area, near an underground space entrance, or other locations unsuitable for handling battery pack thermal risks. The distance-limited vehicle relocation instruction only allows the new energy vehicle to be moved to a preset temporary safe location; loading, securing, and transfer away are not permitted. In this embodiment, the time required for the vehicle to move out of the current hazardous location is determined based on the vehicle's position, the preset temporary safe location, the vehicle's movable status, and the distance-limited movement method. The preset temporary safe location can be an emergency lane, an open parking area, a charging station isolation area, or other locations convenient for personnel evacuation and rescue vehicle parking near the current hazardous location. When the vehicle is movable, indicating that the new energy vehicle can move at low speed, the time required for the vehicle to move out of the current dangerous position includes the estimated travel time for the vehicle to move from its current location to the preset temporary safe location. When the vehicle is movable, indicating that the new energy vehicle cannot move on its own, the time required for the vehicle to move out of the current dangerous position includes the towing connection time and the estimated towing time for the rescue vehicle's towing device to move the new energy vehicle to the preset temporary safe location. The movement range determined by the distance-limited vehicle relocation command is the spatial range between the vehicle's location and the preset temporary safe location, or the electronic fence range formed by the vehicle's location, the preset temporary safe location, and the allowable deviation distance. If the towing safety window cannot cover the complete towing exposure time or the time required for the vehicle to move out of the current dangerous position, or if the insulation status data or the high-voltage power status data do not meet the towing conditions, a towing prohibition command is generated.

[0036] When a towing order is a towing permission order or a distance-limited vehicle relocation order, a towing operation token is generated. The towing operation token includes the token's validity period, permitted operation type, and permitted operation range. A valid towing operation token is one that has not expired, has not been revoked, and is consistent with the current towing order. The permitted operation range can be determined by an electronic fence formed by the vehicle's location, a preset temporary safety location, an isolated parking location, and the current location of the rescue vehicle's towing device. The rescue vehicle's towing device being within the permitted operation range means that its current location has not exceeded the corresponding electronic fence. The token's validity period can be determined by deducting a safety margin from the towing safety window. The safety margin can be calibrated by the rescue company based on vehicle model, battery type, ambient temperature, traffic conditions, and safety distance requirements for rescue personnel. Permitted operation types include towing connection, distance-limited movement, loading and securing, and transfer away. The permitted operation range can be the receiving area around the vehicle's location, the movement range determined by the distance-limited vehicle relocation order, or the transfer route from the vehicle's location to the isolated parking location. Before the rescue vehicle's towing device enters the corresponding operation state, the towing operation token is verified. Operation permissions for a rescue vehicle towing device are granted only when the token is valid, the operation request from the rescue vehicle towing device meets the permitted operation type, and the rescue vehicle towing device is within the permitted operation range. Operation permissions can be reflected in the activation conditions for hydraulic actuation of the towing device, winch traction, towing boom movement, or loading platform movement.

[0037] It should be noted that before the rescue vehicle's towing device enters different towing device states, the verification of the towing operation token adopts a verification method that matches the state with the permission, rather than simply checking whether any permission exists in the towing operation token. Specifically, when the rescue vehicle's towing device requests to enter the towing connection state, it verifies whether the towing operation token contains a towing connection permission. When the rescue vehicle's towing device requests to enter the limited distance movement state, it verifies whether the towing operation token contains a limited distance movement permission. When the rescue vehicle's towing device requests to enter the loading and securing state, it verifies whether the towing operation token contains a loading and securing permission. When the rescue vehicle's towing device requests to enter the transfer and departure state, it verifies whether the towing operation token contains a transfer and departure permission. If the requested towing device state does not match the permission type in the towing operation token, or if the rescue vehicle's towing device is outside the permitted operation range defined by the towing operation token, even if other permissions exist in the towing operation token, the operation permission for the currently requested towing device state will not be granted.

[0038] Specifically, in one implementation, a new energy vehicle triggers a battery pack thermal runaway warning at a service area charging station. The warning data indicates that temperature and pressure changes are rising, but smoke and combustible gas concentrations have not reached the corresponding emergency warning thresholds. Insulation status data meets the towing conditions, and high-voltage power-off status data indicates the vehicle has completed high-voltage power-off. The rescue platform determines the battery pack risk evolution state as accelerated based on the warning data and identifies a towing safety window. Subsequently, the towing exposure time is determined based on the vehicle location, rescue vehicle location, vehicle mobility status, loading and fixing time, and isolated parking location. If the towing safety window covers the towing exposure time, a towing permit instruction is generated, along with a towing operation token including a towing connection permit, a distance movement permit, a loading and fixing permit, and a transfer and departure permit. After the rescue vehicle arrives at the vehicle location, the rescue vehicle's towing device verifies the towing connection permit before entering the towing connection state, the distance movement permit before entering the distance movement state, the loading and fixing permit before entering the loading and fixing state, and the transfer and departure permit before entering the transfer and departure state. The operation permission of the rescue vehicle towing device will be revoked if any stage of the permit is not available, the token expires, or the rescue vehicle towing device exceeds the permitted operation range.

[0039] In some embodiments of this application, the processing steps for dynamically adjusting towing disposal instructions and revoking and reconstructing towing operation tokens are further described. After a new energy vehicle triggers a battery pack thermal runaway warning, the initial judgment result can be a towing permission instruction or a distance-limited vehicle relocation instruction. However, before the arrival of the rescue vehicle, the battery pack warning data may continue to change, and the location of the rescue vehicle, road traffic conditions, loading fixation time, and isolated parking location may also change. Therefore, when the rescue vehicle enters the vehicle's receiving range, or when the towing device changes from standby to work preparation state, the towing safety window and towing exposure time are redefined. The receiving range can be determined by a preset distance range around the vehicle's location, the parking space range, or the spatial range within which the rescue vehicle's towing device can begin towing and connecting. The towing device changing to work preparation state can be triggered by the towing device being powered on, the hydraulic system starting, the towing arm lowering, the winch unlocking, or the towing control interface entering the work mode.

[0040] If the redefined towing safety window still covers the redefined towing exposure time, the original towing operation token and towing disposal instruction remain in effect. While maintaining the original towing operation token and towing disposal instruction, the rescue vehicle's towing device must still perform a towing operation token verification before entering the towing connection state, distance-limited movement state, loading and securing state, or transfer and departure state. If the towing operation token verification fails, the rescue vehicle's towing device must not enter the corresponding towing device state. If the redefined towing safety window no longer covers the redefined towing exposure time but still covers the time required for the vehicle to move out of its current hazardous location, the original towing operation token associated with the towing permit instruction is revoked, and the towing permit instruction is adjusted to a distance-limited movement instruction. Simultaneously, a new towing operation token is generated, including both towing connection permission and distance-limited movement permission. In this case, the permitted operating range is limited to the movement range determined by the distance-limited movement instruction, and the rescue vehicle's towing device can only perform towing connection and distance-limited movement; it cannot enter the loading and securing state or the transfer and departure state. If the redefined towing safety window cannot cover the towing exposure time or the time required to move the vehicle out of its current dangerous location, or if the battery pack warning data indicates that the risk evolution state has entered an emergency evolution state, then the towing operation token will be revoked, and the towing permission instruction or distance-limited vehicle movement instruction will be changed to a towing prohibition instruction.

[0041] When verifying a towing operation token, if the towing instruction is a prohibited towing instruction, or if a valid towing operation token does not exist, the operating permission of the rescue vehicle's towing device is revoked. If the rescue vehicle's towing device requests to enter an unauthorized towing device state, such as requesting to enter a loading and securing state or a transfer and departure state under a distance-limited vehicle movement instruction, the operating permission of the rescue vehicle's towing device is revoked, and the rescue vehicle's towing device is kept in a work-ready state. For example, under a distance-limited vehicle movement instruction, the new towing operation token only includes towing connection permission and distance-limited movement permission. In this case, the rescue vehicle's towing device can enter the towing connection state and distance-limited movement state within the permitted operating range. If the rescue vehicle's towing device requests to enter the loading and securing state or the transfer and departure state, since the new towing operation token does not contain loading and securing permission and transfer and departure permission, the verification result is a failure, and the operating permission of the rescue vehicle's towing device is revoked. If the rescue vehicle's towing device exceeds the permitted operating range, such as requesting to continue moving after reaching a preset temporary safe position under distance-limited movement, the operating permission of the rescue vehicle's towing device is revoked. This approach prevents rescue vehicle towing devices from directly entering high-risk operation phases through manual operation alone; instead, they must comply with the permissions and scope stipulated in the towing operation token.

[0042] Specifically, in one implementation, the rescue platform initially generates a towing permission instruction based on battery pack warning data uploaded from the vehicle, and generates a towing operation token including towing connection permission, distance-limited movement permission, loading and securing permission, and transfer and departure permission. When the rescue vehicle reaches the vehicle's receiving range, the updated battery pack warning data from the vehicle indicates a continuous increase in pressure changes and combustible gas concentration. The redefined towing safety window can no longer cover the full towing exposure time, but it can still cover the time required to move the vehicle out of its current dangerous location. At this point, the original towing operation token is revoked, the towing permission instruction is adjusted to a distance-limited movement instruction, and a new towing operation token is generated that only includes the towing connection permission and the distance-limited movement permission. The rescue vehicle's towing device can then perform a towing connection and move the new energy vehicle to the preset temporary safe location determined by the distance-limited movement instruction. When the rescue vehicle's towing device requests to enter the loading and securing state, since the new towing operation token does not contain the loading and securing permission, the rescue vehicle's towing device's operating authority is closed and it remains in the operation preparation state. Therefore, even if the battery pack risk continues to worsen but a short-distance safe relocation can still be completed, this approach avoids both leaving the vehicle in its current dangerous location and preventing rescue vehicles from performing a full transfer operation.

[0043] It is understood that this embodiment, through the validity period of the towing operation token, the permitted operation type, and the permitted operation range, implements towing permission, distance-limited vehicle movement, and prohibition of towing into continuous operation stages such as towing connection, distance-limited movement, loading and securing, and transfer away. Furthermore, it re-verifies risk conditions when the rescue vehicle approaches or the towing device prepares for operation. It can automatically reduce rescue operation authority if towing is initially permitted but the risk subsequently worsens, preventing rescue personnel from continuing to execute the full towing process after receiving the vehicle. Simultaneously, even when full towing is no longer safe but short-distance movement is still feasible, it retains the controlled ability to move the vehicle out of its current dangerous location. The above effects are not simply about improving judgment details, but rather about forming a dynamic interlocking control of the towing device's actions during road rescue operations, reducing the probability of high-risk battery vehicles being mistakenly loaded or transferred, and improving the reliability of rescue in thermal runaway warning scenarios.

[0044] In one data-driven embodiment, a new energy vehicle triggers a battery pack thermal runaway warning at a charging station. Battery pack warning data uploaded by the vehicle during a 60-second continuous observation period shows that the highest temperature inside the battery pack rose from 68°C to 76°C, the battery pack pressure increased from the normal pressure range to the pressure warning range, the smoke concentration did not exceed the smoke warning threshold, the combustible gas concentration did not exceed the combustible gas warning threshold, the vehicle did not output a high-voltage insulation fault alarm, and the high-voltage power-off status data indicated that the high-voltage main relay had disconnected. Based on the vehicle model parameter table, the rescue platform determines that the temperature and pressure change data continuously increased during the continuous observation period, while the smoke and combustible gas concentration data did not continuously increase. The insulation status data and high-voltage power-off status data meet the dragging conditions. Therefore, the battery pack risk evolution state is determined to be an accelerated evolution state, and the risk deterioration rate is determined as the second risk deterioration rate.

[0045] The vehicle model parameter table pre-records a window baseline value of 22 minutes corresponding to the accelerated evolution state and the second risk deterioration rate. Since the insulation status data meets the towing conditions and the high-voltage power status data indicates that the high-voltage circuit has been completely disconnected, the rescue platform retains this window baseline value and sets the towing safety window at 22 minutes. Subsequently, the rescue platform determines the estimated arrival time of the rescue vehicle to be 7 minutes based on the vehicle's location and position; the estimated time for receiving preparation and towing connection is 3 minutes based on the vehicle's mobility; the estimated time for loading and securing is 5 minutes based on the loading and securing time; and the estimated time for transfer, departure, and unloading is 5 minutes based on the distance from the vehicle's location to the isolated parking position and road traffic conditions. A 2-minute operational safety margin is set based on the rescue vehicle type and the site traffic conditions. Therefore, the towing exposure time is determined to be 22 minutes.

[0046] When the aforementioned towing safety window equals the towing exposure time, and the insulation status data and high-voltage electrical status data meet the towing conditions, the rescue platform generates a towing permission instruction and a towing operation token. This towing operation token is valid for 20 minutes and allows for operations including towing connection, distance-limited movement, loading and securing, and transfer away. The permitted operation range is the electronic fence area between the vehicle's location and the isolated parking position. The token's validity period is shorter than the towing safety window because the rescue platform deducts a safety margin from the towing safety window to compensate for traffic delays and repeated adjustments to the towing device. When the rescue vehicle's towing device requests to enter the towing connection state, the rescue platform verifies that the towing operation token contains a towing connection permission and that the rescue vehicle's towing device is within the permitted operation range, thus granting the towing connection state operation permission. When the rescue vehicle's towing device requests to enter the loading and securing state or the transfer away state, the loading and securing permission and the transfer away permission are verified respectively, and the corresponding operation permission is granted upon successful verification.

[0047] In another data-driven embodiment, when the rescue vehicle enters the receiving area of ​​the vehicle's location, the updated battery pack warning data from the vehicle indicates that the highest temperature inside the battery pack rises from 76°C to 88°C within a new 60-second continuous observation period. The battery pack pressure continues to rise, and the flammable gas concentration rises to the flammable gas warning range, but the smoke concentration has not yet reached the corresponding emergency warning threshold, and the high-voltage power-off status remains disconnected. Based on the updated battery pack warning data, the rescue platform maintains the battery pack risk evolution status in an accelerated evolution state, but adjusts the risk deterioration rate from the second risk deterioration rate to the third risk deterioration rate, and shortens the redefined towing safety window to 10 minutes according to the vehicle model parameter table. At this time, the redefined towing exposure time no longer includes the arrival time because the rescue vehicle has entered the receiving area, but still includes 3 minutes for towing connection, 5 minutes for loading and securing, 5 minutes for transfer and unloading, and 2 minutes for operational safety margin, totaling 15 minutes. Because the redefined towing safety window is shorter than the redefined towing exposure time, the original towing operation token is revoked.

[0048] In the above situation, the rescue platform continues to determine whether the towing safety window covers the time required to move the vehicle out of its current dangerous location. If the vehicle is located in a charging parking space, the preset temporary safe location is a 50-meter-long isolation zone at the station. The vehicle's movable status indicates that the new energy vehicle cannot move on its own but can be towed a short distance. The estimated towing connection time is 3 minutes, and the estimated time to move the vehicle to the isolation zone is 4 minutes, with a safety margin of 1 minute. Therefore, the time required to move the vehicle out of its current dangerous location is 8 minutes. Since the newly determined 10-minute towing safety window covers the 8-minute time required to move the vehicle out of its current dangerous location, the rescue platform adjusts the towing permit instruction to a distance-limited movement instruction and generates a new towing operation token. The new towing operation token only includes towing connection permission and distance-limited movement permission, and the permitted operation area is limited to the electronic fence area between the vehicle's location and the isolation zone at the station.

[0049] After a new towing operation token takes effect, when a rescue vehicle's towing device requests to enter the towing connection state, the rescue platform verifies that the towing operation token contains a towing connection permit and that the rescue vehicle's towing device is within the permitted operating range, thus granting the towing connection state operation permission. When the rescue vehicle's towing device requests to enter the limited-distance movement state, the rescue platform verifies that the towing operation token contains a limited-distance movement permit and that the rescue vehicle's towing device is still within the permitted operating range, thus granting the limited-distance movement state operation permission. Once the new energy vehicle has been moved to the station's isolation position, if the rescue vehicle's towing device continues to request to enter the loading and securing state, since the new towing operation token does not contain a loading and securing permit, the rescue platform deactivates the rescue vehicle's towing device's operation permission and keeps the towing device in the operation-ready state. Through this process, even when a complete towing no longer meets the safety window, the vehicle is still allowed to be moved out of the charging parking space under control, preventing the rescue vehicle from continuing to perform loading, securing, and transfer operations.

[0050] The above-described data-driven embodiments illustrate the relationship between the towing safety window, the towing exposure time, and the time required for the vehicle to move out of its current dangerous position. The temperature, pressure, time, and distance values ​​described above are illustrative and can be calibrated or adjusted based on battery type, vehicle model, rescue vehicle type, site conditions, road traffic conditions, and rescue safety margin in actual implementation. This does not constitute a limitation on the scope of protection of this application.

[0051] In summary, this system uses battery pack warning data to determine the safe towing window when a vehicle transitions from its current warning state to a state where towing is prohibited. Then, vehicle status data and rescue operation data are used to determine the towing exposure time. This allows rescue decisions to move beyond simply relying on whether the vehicle is under warning or the distance of the rescue vehicle; instead, instructions are generated based on the matching relationship between the rate of battery pack risk deterioration and the actual towing operation time. When towing or limited-distance movement is permitted, a towing operation token controls the operating authority of the rescue vehicle's towing device. This token constrains actions such as towing connection, limited-distance movement, loading and securing, and transfer away from the site, preventing the rescue vehicle from operating according to standard faulty vehicle procedures when the risk level is no longer suitable for towing. Simultaneously, the towing safety window and towing exposure time are redefined when the rescue vehicle approaches the vehicle or the towing device enters a work preparation state. If conditions are not met, the towing operation token is revoked and the handling authority is reduced. The above measures can reduce the probability of rescuers coming into close contact with high-risk battery packs, reduce the risk of thermal runaway exacerbation, smoke, reignition or high voltage abnormalities during vehicle loading, securing and transport, and prevent high-risk vehicles from being mistakenly towed into repair shops, parking lots or other locations unsuitable for isolation and disposal, thereby improving the safety, real-time performance and controllability of road rescue operations in the context of thermal runaway early warning for new energy vehicles.

[0052] Based on another preferred embodiment described above, see [link to preferred embodiment]. Figure 3 As shown, this embodiment provides a new energy vehicle rescue system based on battery pack thermal runaway early warning, used to apply the above-mentioned new energy vehicle rescue method based on battery pack thermal runaway early warning, including: The data acquisition unit is used to acquire battery pack early warning data, vehicle status data, and rescue operation data of new energy vehicles.

[0053] The processing unit is used to determine the risk evolution status of the battery pack based on the battery pack warning data, and to determine the towing safety window when the vehicle progresses from the current warning status to the towing prohibition status.

[0054] The processing unit is also used to determine the towing exposure time based on vehicle status data and rescue operation data.

[0055] The judgment unit is used to compare the towing safety window and the towing exposure time, and generate a towing disposal instruction in combination with the battery pack warning data. When the towing disposal instruction is a towing permission instruction or a distance-limited vehicle movement instruction, a towing operation token is generated, and the operation permission of the rescue vehicle's towing device is controlled according to the towing operation token.

[0056] The adjustment unit is used to redetermine the towing safety window and towing exposure time when the rescue vehicle enters the vehicle's receiving range or the towing device changes to the work-ready state. If the redetermined towing safety window does not meet the redetermined towing exposure time, the towing operation token is revoked, and the towing permission instruction is adjusted to a distance-limited vehicle movement instruction or a towing prohibition instruction, or the distance-limited vehicle movement instruction is adjusted to a towing prohibition instruction.

[0057] It is understandable that the above-mentioned new energy vehicle rescue methods and systems based on battery pack thermal runaway early warning have the same beneficial effects, and will not be elaborated further here.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A new energy vehicle rescue method based on battery pack thermal runaway early warning, characterized in that, include: Acquire battery pack early warning data, vehicle status data, and rescue operation data for new energy vehicles; The battery pack risk evolution status is determined based on the battery pack warning data, and the towing safety window for the vehicle to progress from the current warning status to the towing prohibition status is determined. The towing exposure time is determined based on the vehicle status data and the rescue operation data; The towing safety window and the towing exposure time are compared, and a towing disposal instruction is generated in combination with the battery pack warning data. When the towing disposal instruction is a towing permission instruction or a distance-limited vehicle movement instruction, a towing operation token is generated, and the operation permission of the rescue vehicle's towing device is controlled according to the towing operation token. When the rescue vehicle enters the vehicle's receiving range, or when the towing device changes to the work-ready state, the towing safety window and towing exposure time are redefined. If the redefined towing safety window does not meet the redefined towing exposure time, the towing operation token is revoked, and the towing permission instruction is changed to a distance-limited movement instruction or a towing prohibition instruction, or the distance-limited movement instruction is changed to a towing prohibition instruction.

2. The new energy vehicle rescue method based on battery pack thermal runaway early warning according to claim 1, characterized in that, The battery pack warning data includes temperature change data, pressure change data, smoke concentration data, combustible gas concentration data, insulation status data, and high-voltage electrical status data; the vehicle status data includes vehicle location and vehicle mobility status; the rescue operation data includes rescue vehicle location, towing device status, loading and fixing time, and isolated parking location.

3. The new energy vehicle rescue method based on battery pack thermal runaway early warning according to claim 2, characterized in that, Determining the towing safety window includes: determining the risk deterioration rate based on the temperature change data, pressure change data, smoke concentration data, and combustible gas concentration data; and determining the towing safety window based on the risk deterioration rate, insulation status data, and high-voltage electrical status data.

4. The new energy vehicle rescue method based on battery pack thermal runaway early warning according to claim 2, characterized in that, Determining the drag exposure time includes: The preparation time for receiving the vehicle is determined based on the vehicle's location, the rescue vehicle's location, and the vehicle's mobility status. The time required to complete the transfer is determined based on the fixed loading time and the isolated parking location. The time taken to prepare for receiving the vehicle and the time taken to complete the transfer are combined as the towing exposure time.

5. The new energy vehicle rescue method based on battery pack thermal runaway early warning according to claim 2, characterized in that, When generating a drag-and-drop instruction, the following are included: When the towing safety window covers the towing exposure time, and the insulation status data and the high-voltage power-off status data meet the towing conditions, a towing permission command is generated; When the towing safety window does not cover the towing exposure time but covers the time required for the vehicle to move out of the current dangerous position, a distance-limited vehicle relocation command is generated. When the conditions for generating the towing permission command and the distance-limited vehicle movement command are not met, a towing prohibition command is generated.

6. The new energy vehicle rescue method based on battery pack thermal runaway early warning according to claim 5, characterized in that, The towing operation token includes: token validity period, permitted operation type, and permitted operation range; within the token validity period, and when the towing device status meets the permitted operation type and the rescue vehicle towing device is within the permitted operation range, the operation permission of the rescue vehicle towing device is granted; otherwise, the operation permission of the rescue vehicle towing device is deactivated.

7. The new energy vehicle rescue method based on battery pack thermal runaway early warning according to claim 6, characterized in that, The permitted operation types include towing connection, distance movement, loading and securing, and transfer and departure; the towing operation token includes towing connection permission, distance movement permission, loading and securing permission, and transfer and departure permission associated with the permitted operation types; When the towing disposal instruction is a distance-limited vehicle relocation instruction, the towing operation token only includes towing connection permission and distance-limited movement permission, and the permitted operation range is limited to the movement range determined by the distance-limited vehicle relocation instruction.

8. The new energy vehicle rescue method based on battery pack thermal runaway early warning according to claim 7, characterized in that, The towing device status includes operation preparation status, towing connection status, limited distance movement status, loading and fixing status, and transfer and departure status. Before the rescue vehicle towing device enters the towing connection status, limited distance movement status, loading and fixing status, or transfer and departure status, it verifies whether the towing operation token has towing connection permission, limited distance movement permission, loading and fixing permission, or transfer and departure permission.

9. The new energy vehicle rescue method based on battery pack thermal runaway early warning according to claim 8, characterized in that, Verifying the drag job token includes: If the towing command is a towing prohibition command, or if there is no valid towing operation token, then the operation permission of the rescue vehicle's towing device will be closed; If the towing disposal instruction is changed from a towing permission instruction to a distance-limited movement instruction, the original towing operation token is revoked, and a new towing operation token including a towing connection permission and a distance-limited movement permission is generated, and the permitted operation range is limited to the movement range determined by the distance-limited movement instruction; If the rescue vehicle towing device requests to enter an unauthorized towing device state, or if the rescue vehicle towing device exceeds the permitted operating range, the operating permission of the rescue vehicle towing device is revoked, and the rescue vehicle towing device is kept in the operating ready state.

10. A new energy vehicle rescue system based on battery pack thermal runaway early warning, used to apply the new energy vehicle rescue method based on battery pack thermal runaway early warning as described in any one of claims 1-9, characterized in that, include: The data acquisition unit is used to acquire battery pack early warning data, vehicle status data, and rescue operation data of new energy vehicles; The processing unit is used to determine the risk evolution state of the battery pack based on the battery pack warning data, and to determine the towing safety window when the vehicle evolves from the current warning state to the towing prohibition state. The processing unit is also configured to determine the towing exposure time based on the vehicle status data and the rescue operation data; The judgment unit is used to compare the towing safety window and the towing exposure time, and generate a towing disposal instruction in combination with the battery pack warning data. When the towing disposal instruction is a towing permission instruction or a distance-limited vehicle movement instruction, a towing operation token is generated, and the operation permission of the rescue vehicle towing device is controlled according to the towing operation token. The adjustment unit is used to redetermine the towing safety window and towing exposure time when the rescue vehicle's location enters the vehicle's receiving range or the towing device's status changes to the work preparation state. If the redefined towing safety window does not meet the redefined towing exposure time, the towing operation token is revoked, and the towing permission instruction is changed to a distance-limited movement instruction or a towing prohibition instruction, or the distance-limited movement instruction is changed to a towing prohibition instruction.

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