CN-121997522-A - Method and device for determining running state of vehicle

CN121997522ACN 121997522 ACN121997522 ACN 121997522ACN-121997522-A

Abstract

The application discloses a method and a device for determining the running state of a vehicle, which are applied to the technical field of vehicle control, wherein in the method, and acquiring a sensor value acquired by a sensor included in the vehicle power system, and configuring a simulation model of the vehicle power system by using the sensor value. The simulation model comprises a first temperature calculation unit and a second temperature calculation unit which are constructed based on the sensor. Therefore, the discretization simulation of the vehicle power system is realized, the data acquired by the multi-type sensors are fully utilized, and the internal temperature of the vehicle power system is accurately determined. And determining the running units participating in the simulation according to the historical running states of the vehicle power system. And operating the simulation model to obtain an operation result including the temperature. And determining the current running state of the vehicle power system according to the running result. Therefore, the current running state of the vehicle power system can be accurately determined, the vehicle power system can be subjected to heat management according to the current running state, and the effect of heat management is improved.

Inventors

LONG YIMING
JIAO WEI

Assignees

上海汽车集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (10)

1. A method of determining a vehicle operating condition, the method comprising: Acquiring sensor values acquired by sensors included in the vehicle power system, configuring a simulation model of the vehicle power system by using the sensor values, wherein the simulation model comprises a first temperature calculation unit and a second temperature calculation unit, the first temperature calculation unit corresponds to two adjacent temperature sensors included in the vehicle power system, the second temperature calculation unit corresponds to an adjacent temperature sensor included in the vehicle power system and a target type sensor, and the target type sensor is a sensor for calculating temperature according to acquired data except the temperature sensor; Determining an operation unit participating in simulation from units included in the simulation model according to the historical operation state of the vehicle power system, wherein the operation unit at least comprises the first temperature calculation unit; operating the simulation model to obtain an operation result, wherein the operation result comprises the temperature of the operation unit; And determining the current running state of the vehicle power system according to the running result.
2. The method according to claim 1, wherein the historical operating state is a normal operating state, and the determining an operating unit participating in simulation from units included in the simulation model includes: taking the first temperature calculation unit as an operation unit; Or alternatively The historical operation state is an abnormal operation state, and the determining operation units participating in simulation from the units included in the simulation model comprises the following steps: determining a target unit corresponding to the abnormal operation state, the target unit including the second temperature calculation unit; And taking the first temperature calculation unit and the target unit as operation units.
3. The method of claim 2, wherein the abnormal operation state comprises a partially failed operation state and a failed operation state, the partially failed operation state corresponding to a number of target units less than or equal to the number of target units corresponding to the failed operation state.
4. The method of claim 1, wherein said determining a current operating state of the vehicle powertrain from the operating result comprises: if the operation result meets a normal operation condition, determining that the current operation state of the vehicle power system is a normal operation state, wherein the normal operation condition comprises that the number of operation units with the temperature exceeding a preset temperature range is smaller than a first number threshold; And if the operation result meets an abnormal operation condition, determining that the current operation state of the vehicle power system is the abnormal operation state, wherein the abnormal operation condition comprises that the number of operation units with the temperature exceeding a preset temperature range is larger than or equal to a second number threshold value or the number of operation units with the temperature change rate exceeding the preset change rate range is larger than or equal to a third number threshold value.
5. The method according to claim 1, wherein the method further comprises: In response to determining that a current operating state of the vehicle powertrain is an abnormal operating state, performing a thermal management operation corresponding to the abnormal operating state.
6. The method of any one of claims 1-5, wherein the simulation model is constructed by: Acquiring a topological structure of the vehicle power system, wherein the topological structure comprises components, connection relations among the components, sensors and configuration positions of the sensors, and the sensors comprise temperature sensors and target type sensors; Dividing the vehicle power system by the target type sensor based on the configuration positions of the adjacent sensors to obtain a plurality of simulation areas, wherein the boundaries of the simulation areas are determined by the configuration positions of the adjacent sensors; Constructing a first temperature calculation unit aiming at a simulation area with a boundary determined based on two adjacent temperature sensors, and configuring a first temperature calculation formula of the first temperature calculation unit, wherein the temperature of the first temperature calculation unit is determined based on the sensor values of the two adjacent temperature sensors; For a simulation area with boundaries determined based on one adjacent temperature sensor and one target type sensor, a second temperature calculation unit is constructed, a second temperature calculation formula of the second temperature calculation unit is configured, and the temperature of the second temperature calculation unit is determined based on the sensor values of the one adjacent temperature sensor and the one target type sensor.
7. The method of claim 6, wherein the second temperature calculation formula is determined from an initial temperature, a power, and a heat capacity, the initial temperature being determined based on historical operating conditions of components included in the simulation zone, the power being one or more of current heat generation power, mechanical friction heat generation power, and fluid heat transfer power, the heat capacity being determined from performance parameters of components included in the simulation zone.
8. A vehicle running state determining apparatus, characterized by comprising: An acquisition unit configured to acquire a sensor value acquired by a sensor included in the vehicle power system, configure a simulation model of the vehicle power system using the sensor value, the simulation model including a first temperature calculation unit corresponding to two adjacent temperature sensors included in the vehicle power system and a second temperature calculation unit corresponding to an adjacent one of the temperature sensors included in the vehicle power system and a target type sensor that is a sensor other than the temperature sensor, the acquired data being used for calculating a temperature; a unit determining unit, configured to determine an operation unit participating in simulation from units included in the simulation model according to a historical operation state of the vehicle power system, where the operation unit includes at least the first temperature calculating unit; the operation unit is used for operating the simulation model to obtain an operation result, wherein the operation result comprises the temperature of the operation unit; And the state determining unit is used for determining the current running state of the vehicle power system according to the running result.
9. An apparatus comprising a processor, a memory, and a system bus; The processor and the memory are connected through the system bus; the memory is for storing one or more programs, the one or more programs comprising instructions, which when executed by the processor, cause the processor to perform the method of any of claims 1-7.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein instructions, which when run on a terminal device, cause the terminal device to perform the method of any of claims 1-7.

Description

Method and device for determining running state of vehicle Technical Field The application relates to the technical field of vehicle control, in particular to a method and a device for determining a vehicle running state. Background Among failures in electrically driven vehicles, thermal runaway is a common failure. Thermal runaway refers to a series of irreversible system failure phenomena caused by a sharp rise in the internal temperature of the vehicle's powertrain. To avoid the occurrence of thermal runaway, electrically driven vehicles are thermally managed. The thermal management is used for detecting the temperature of components included in the vehicle power system, and executing a corresponding management strategy when the detected temperature is higher, so as to control the temperature of the vehicle power system. In the process of thermally managing a vehicle, it is necessary to determine whether there is a temperature-induced failure of the vehicle at present based on temperature information of a driving system of the vehicle. At present, it is difficult to realize calculation of the component temperature included in the vehicle power system with high accuracy, and the effect of performing thermal management on the vehicle is poor. Disclosure of Invention In view of the above, the present application provides a method and apparatus for determining a running state of a vehicle, which can improve the effect of thermal management on the vehicle. The technical scheme provided by the application is as follows: in a first aspect, the present application provides a method of determining a vehicle operating state, the method comprising: Acquiring sensor values acquired by sensors included in the vehicle power system, configuring a simulation model of the vehicle power system by using the sensor values, wherein the simulation model comprises a first temperature calculation unit and a second temperature calculation unit, the first temperature calculation unit corresponds to two adjacent temperature sensors included in the vehicle power system, the second temperature calculation unit corresponds to an adjacent temperature sensor included in the vehicle power system and a target type sensor, and the target type sensor is a sensor for calculating temperature according to acquired data except the temperature sensor; Determining an operation unit participating in simulation from units included in the simulation model according to the historical operation state of the vehicle power system, wherein the operation unit at least comprises the first temperature calculation unit; operating the simulation model to obtain an operation result, wherein the operation result comprises the temperature of the operation unit; And determining the current running state of the vehicle power system according to the running result. In one possible implementation manner, the historical operation state is a normal operation state, and the determining an operation unit participating in simulation from units included in the simulation model includes: taking the first temperature calculation unit as an operation unit; Or alternatively The historical operation state is an abnormal operation state, and the determining operation units participating in simulation from the units included in the simulation model comprises the following steps: determining a target unit corresponding to the abnormal operation state, the target unit including the second temperature calculation unit; And taking the first temperature calculation unit and the target unit as operation units. In one possible implementation manner, the abnormal operation state includes a partial failure operation state and a failure operation state, and the number of target units corresponding to the partial failure operation state is smaller than or equal to the number of target units corresponding to the failure operation state. In one possible implementation, the determining the current operating state of the vehicle power system according to the operating result includes: if the operation result meets a normal operation condition, determining that the current operation state of the vehicle power system is a normal operation state, wherein the normal operation condition comprises that the number of operation units with the temperature exceeding a preset temperature range is smaller than a first number threshold; And if the operation result meets an abnormal operation condition, determining that the current operation state of the vehicle power system is the abnormal operation state, wherein the abnormal operation condition comprises that the number of operation units with the temperature exceeding a preset temperature range is larger than or equal to a second number threshold value or the number of operation units with the temperature change rate exceeding the preset change rate range is larger than or equal to a third number threshold value. In one possible implementation, the met