CN-121973634-A - Charging control method, device, system and storage medium

CN121973634ACN 121973634 ACN121973634 ACN 121973634ACN-121973634-A

Abstract

The application discloses a charging control method, a device, a system and a storage medium, wherein the method comprises the steps of monitoring a temperature value and/or a corresponding voltage signal output by a temperature sensor at a charging socket, diagnosing whether the temperature sensor has at least one serious fault of open-circuit faults, short-circuit faults or temperature value out-of-range faults based on the temperature value and/or the voltage signal, judging the current fault state of the temperature sensor according to a preset range interval in which the temperature value is located when the open-circuit faults, the short-circuit faults and the temperature value out-of-range faults do not exist, and executing a corresponding control response strategy according to the judged fault state, wherein the control response strategy comprises the steps of reporting fault information, sending early warning, controlling derating operation of a charging process or controlling to stop charging. By adopting the scheme, the fault can be identified at the early risk stage and the pre-warning is sent out, so that the safety of the charging process is improved.

Inventors

LI WENJIE

Assignees

安徽智界新能源汽车有限公司
奇瑞汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260331

Claims (10)

1. A charging control method is characterized by comprising ‌ steps of Monitoring a temperature value and/or a corresponding voltage signal output by a temperature sensor at the charging socket; diagnosing whether the temperature sensor has at least one serious fault of open-circuit faults, short-circuit faults or temperature value out-of-range faults based on the temperature value and/or the voltage signal; When no open-circuit fault, short-circuit fault and temperature value out-of-range fault exist, judging the current fault state of the temperature sensor according to a preset range interval where the temperature value is located; And executing a corresponding control response strategy according to the determined fault state, wherein the control response strategy comprises the steps of reporting fault information, sending out early warning, controlling derating operation in the charging process or controlling to stop charging.
2. The method of claim 1, wherein said diagnosing whether said temperature sensor has at least one of an open fault, a short fault, or a temperature over-range fault comprises ‌ Diagnosing an open-circuit severe fault when the voltage signal of the temperature sensor is lower than or equal to a first voltage threshold; when the voltage signal of the temperature sensor is higher than or equal to a second voltage threshold value, diagnosing that the short circuit is seriously failed; and diagnosing that the temperature value exceeds the range of the temperature value by a severe fault when the temperature value is continuously higher than a first temperature threshold value for more than a first preset time or when the temperature value is continuously lower than a second temperature threshold value for more than a second preset time.
3. The method according to claim 1, wherein the determining the current fault state of the temperature sensor according to the preset range interval in which the temperature value is located includes: when the temperature value is smaller than a first normal threshold value, judging that the working state is normal; When the temperature value is less than a first fault threshold and greater than or equal to the first normal threshold, determining a slight fault; when the temperature value is smaller than a second fault threshold value and larger than or equal to the first fault threshold value, judging that the temperature value is a general fault; When the temperature value is smaller than a third fault threshold and larger than or equal to the second fault threshold, judging that the fault is more serious; and when the temperature value is greater than or equal to the third fault threshold, judging that the fault is serious.
4. A method according to claim 3, characterized in that the method further comprises: ‌ A Re-executing a state determination when the temperature sensor is in a light fault state and the current temperature value is less than a first fallback threshold value; When the temperature sensor is in a general fault state and the current temperature value is smaller than a second fallback threshold value, re-executing state judgment according to new threshold value intervals after the first fault threshold value, the second fault threshold value and the third fault threshold value are subtracted by the first adjustment value; When the temperature sensor is in a serious fault state and the current temperature value is smaller than a third fallback threshold value, re-executing state judgment according to new threshold value intervals after the first fault threshold value, the second fault threshold value and the third fault threshold value are subtracted by the second adjustment value; the first fallback threshold value is smaller than the first normal threshold value, the second fallback threshold value is larger than the first fallback threshold value and smaller than the first fault threshold value, and the third fallback threshold value is larger than the first fallback threshold value.
5. The control optimization method according to claim 1, wherein said executing a corresponding control response strategy based on the determined fault condition comprises ‌ If the temperature sensor is judged to be severely failed, the temperature sensor is controlled to stop working, and the charging is immediately reported to be required to stop; if the fault is judged to be serious, after the fault lasts for a third preset time, controlling the temperature sensor to stop working and reporting a requirement for stopping charging; If the general fault is judged, when the fault occurs for the first time, reporting and requiring charge derating operation after delaying a fourth preset time, when the fault occurs for the second time, reporting and requiring charge derating operation after delaying a fifth preset time, and when the fault occurs for the third time, reporting and requiring stop of charge, wherein the fourth preset time is longer than the fifth preset time.
6. The control optimization method according to claim 1, characterized in that the control of the derating of the charging process comprises: Determining different derating power gradients based on the current fault level and the historical fault frequency, wherein the derating power gradient is larger as the historical fault frequency is higher or the current fault level is higher; And reporting and requesting charge derating operation according to the derating power gradient.
7. The control optimization method according to claim 1, wherein said executing a corresponding control response strategy based on the determined fault condition comprises ‌ If the fault is determined to be a slight fault, the control response strategy is to send out fault early warning information so as to prompt that the over-temperature risk exists.
8. A charge control device is characterized by comprising ‌ The first monitoring module is used for monitoring the temperature value and/or the corresponding voltage signal output by the temperature sensor at the charging socket; the diagnosis module is used for diagnosing whether the temperature sensor has at least one serious fault of open-circuit faults, short-circuit faults or temperature value out-of-range faults or not based on the temperature value and/or the voltage signal; The judging module is used for judging the current fault state of the temperature sensor according to the preset range interval where the temperature value is located when the open-circuit fault, the short-circuit fault and the temperature value out-of-range fault do not exist; And the execution module is used for executing a corresponding control response strategy according to the determined fault state, wherein the control response strategy comprises the steps of reporting fault information, sending out early warning, controlling derating operation of the charging process or controlling to stop charging.
9. A charge control system, characterized by comprising: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores instructions executable by the at least one processor to implement the charge control method of any one of claims 1-7.
10. A computer readable storage medium, characterized in that instructions in the storage medium, when executed by a corresponding processor of a charge control system, enable the charge control system to implement the charge control method of any one of claims 1-7.

Description

Charging control method, device, system and storage medium Technical Field The present application relates to the field of charging security technologies, and in particular, to a charging control method, device, system, and storage medium. Background With the popularization of new energy automobiles, charging safety becomes an important issue. At present, a common temperature control strategy is generally simpler, for example, one or several fixed temperature thresholds are set, and when the monitored temperature exceeds the thresholds, protection measures such as stopping charging or derating charging are directly adopted. Due to the lack of an early warning mechanism in the early stages of a temperature anomaly (the dangerous level has not been reached), no risk prompt can be provided to the driver or the backend system for early intervention or inspection. Therefore, how to provide a charging control method to identify a fault and send out a pre-warning in the early risk stage, so as to improve the safety of the charging process, is a technical problem to be solved urgently. Disclosure of Invention The application provides a charging control method, a device, a system and a storage medium, which are used for identifying faults at the early risk stage and sending out pre-warning so as to improve the safety of a charging process. The application provides a charging control method, which comprises the following steps: monitoring a temperature value and/or a corresponding voltage signal output by a temperature sensor at the charging socket; diagnosing whether the temperature sensor has at least one serious fault of open-circuit faults, short-circuit faults or temperature value out-of-range faults based on the temperature value and/or the voltage signal; When no open-circuit fault, short-circuit fault and temperature value out-of-range fault exist, judging the current fault state of the temperature sensor according to a preset range interval where the temperature value is located; And executing a corresponding control response strategy according to the determined fault state, wherein the control response strategy comprises the steps of reporting fault information, sending out early warning, controlling derating operation in the charging process or controlling to stop charging. The method has the advantages that the temperature value and/or the corresponding voltage signal output by the temperature sensor at the charging socket are monitored, whether the temperature sensor has at least one serious fault of open-circuit faults, short-circuit faults or out-of-range faults of the temperature value is diagnosed based on the temperature value and/or the voltage signal, when the open-circuit faults, the short-circuit faults and the out-of-range faults of the temperature value do not exist, the current fault state of the temperature sensor is judged according to the preset range interval where the temperature value is located, and corresponding control response strategies are executed according to the judged fault state, wherein the control response strategies comprise reporting fault information, sending early warning, controlling the derating operation of the charging process or controlling the stopping of charging. The application realizes the accurate identification of serious faults such as open circuit, short circuit, temperature out-of-range and the like of the sensor through double diagnosis of fusion voltage and temperature signals, and further carries out multistage fault division and control according to a temperature interval, and controls the condition of no serious faults. The fault can be identified at the early risk stage and the front-end early warning is sent out, so that the safety of the charging process is improved. In one embodiment, the diagnosing whether the temperature sensor has at least one serious fault of open circuit fault, short circuit fault or temperature value out-of-range fault comprises ‌ Diagnosing an open-circuit severe fault when the voltage signal of the temperature sensor is lower than or equal to a first voltage threshold; when the voltage signal of the temperature sensor is higher than or equal to a second voltage threshold value, diagnosing that the short circuit is seriously failed; and diagnosing that the temperature value exceeds the range of the temperature value by a severe fault when the temperature value is continuously higher than a first temperature threshold value for more than a first preset time or when the temperature value is continuously lower than a second temperature threshold value for more than a second preset time. In one embodiment, the determining, according to the preset range interval in which the temperature value is located, the current fault state of the temperature sensor includes: when the temperature value is smaller than a first normal threshold value, judging that the working state is normal; When the temperature value is less than a first fa