Warning method and apparatus for battery thermal runaway, medium, and device

1. A warning method for battery thermal runaway, comprising:

acquiring current temperature data of each temperature sensor arranged in a battery pack, current voltage data of each voltage sensor arranged in the battery pack, and current sensor disconnection data of each temperature sensor;

calculating a number of occurrences of a primary feature at a current moment according to the current temperature data, wherein the primary feature comprises an abnormal-temperature feature of the temperature sensor; the number of occurrences of the primary feature at the current moment is a sum of the numbers of occurrences of the abnormal-temperature feature of all of the temperature sensors arranged in the battery pack at the current moment;

calculating a number of occurrences of a secondary feature at the current moment according to the current voltage data and the current sensor disconnection data in a case that the number of occurrences of the primary feature is greater than 0, wherein the secondary feature comprises an abnormal-voltage feature of the voltage sensor and a sensor disconnection feature of the temperature sensor; the number of occurrences of the secondary feature at the current moment is a sum of occurrences of the sensor disconnection feature of all of the temperature sensors arranged in the battery pack at the current moment and occurrences of the abnormal-voltage feature of all of the voltage sensors at the current moment;

calculating a sum of the number of occurrences of the primary feature and the number of occurrences of the secondary feature at the current moment; and

sending a warning for battery thermal runaway in a case that the sum is greater than a preset feature number threshold.

2. The method according to claim 1 , wherein the current temperature data comprises a current temperature and a current temperature rise rate; and the abnormal-temperature feature comprises the current temperature of the temperature sensor in the battery pack exceeding a preset temperature threshold and/or the current temperature rise rate of the temperature sensor in the battery pack exceeding a preset temperature rise rate threshold.

3. The method according to claim 1 , wherein the abnormal-voltage feature comprises the voltage sensor in the battery pack being disconnected, a current voltage of the voltage sensor in the battery pack being greater than a preset voltage upper limit, and a current voltage of the voltage sensor in the battery pack being less than a preset voltage lower limit.

4. The method according to claim 1 , further comprising: determining that no thermal runaway occurs in a case that the number of occurrences of the primary feature is equal to 0.

5. A warning apparatus for battery thermal runaway, comprising:

an acquisition module, configured to acquire current temperature data of each temperature sensor arranged in a battery pack, current voltage data of each voltage sensor arranged in the battery pack, and current sensor disconnection data of each temperature sensor;

a statistics module, configured to calculate a number of occurrences of a primary feature at a current moment according to the current temperature data, and calculate a number of occurrences of a secondary feature at the current moment according to the current voltage data and the current sensor disconnection data in a case that the number of occurrences of the primary feature is greater than 0, wherein the primary feature comprises an abnormal-temperature feature of the temperature sensor; the number of occurrences of the primary feature at the current moment is a sum of the numbers of occurrences of the abnormal-temperature feature of all of the temperature sensors arranged in the battery pack at the current moment; the secondary feature comprises an abnormal-voltage feature of the voltage sensor and a sensor disconnection feature of the temperature sensor; and the number of occurrences of the secondary feature at the current moment is a sum of occurrences of the sensor disconnection feature of all of the temperature sensors arranged in the battery pack at the current moment and occurrences of the abnormal-voltage feature of all of the voltage sensors at the current moment;

a calculation module, configured to calculate a sum of the number of occurrences of the primary feature and the number of occurrences of the secondary feature at the current moment; and

a warning module, configured to send a warning for battery thermal runaway in a case that the sum is greater than a preset feature number threshold.

6. The apparatus according to claim 5 , wherein the current temperature data comprises a current temperature and a current temperature rise rate; and the abnormal-temperature feature comprises the current temperature of the temperature sensor in the battery pack exceeding a preset temperature threshold and/or the current temperature rise rate of the temperature sensor in the battery pack exceeding a preset temperature rise rate threshold.

7. The apparatus according to claim 5 , wherein the abnormal-voltage feature comprises the voltage sensor in the battery pack being disconnected, a current voltage of the voltage sensor in the battery pack being greater than a preset voltage upper limit, and a current voltage of the voltage sensor in the battery pack being less than a preset voltage lower limit.

8. The apparatus according to claim 5 , wherein the warning module is further configured to determine that no thermal runaway occurs in a case that the number of occurrences of the primary feature is equal to 0.

9. A non-transitory computer-readable storage medium storing a computer program for, when executed by at least one processor, the processor to perform:

acquiring current temperature data of each temperature sensor arranged in a battery pack, current voltage data of each voltage sensor arranged in the battery pack, and current sensor disconnection data of each temperature sensor;

calculating a number of occurrences of a primary feature at a current moment according to the current temperature data, wherein the primary feature comprises an abnormal-temperature feature of the temperature sensor; the number of occurrences of the primary feature at the current moment is a sum of the numbers of occurrences of the abnormal-temperature feature of all of the temperature sensors arranged in the battery pack at the current moment;

calculating a number of occurrences of a secondary feature at the current moment according to the current voltage data and the current sensor disconnection data in a case that the number of occurrences of the primary feature is greater than 0, wherein the secondary feature comprises an abnormal-voltage feature of the voltage sensor and a sensor disconnection feature of the temperature sensor; the number of occurrences of the secondary feature at the current moment is a sum of occurrences of the sensor disconnection feature of all of the temperature sensors arranged in the battery pack at the current moment and occurrences of the abnormal-voltage feature of all of the voltage sensors at the current moment;

calculating a sum of the number of occurrences of the primary feature and the number of occurrences of the secondary feature at the current moment; and

sending a warning for battery thermal runaway in a case that the sum is greater than a preset feature number threshold.

10. The non-transitory computer-readable storage medium according to claim 9 , wherein the current temperature data comprises a current temperature and a current temperature rise rate; and the abnormal-temperature feature comprises the current temperature of the temperature sensor in the battery pack exceeding a preset temperature threshold and/or the current temperature rise rate of the temperature sensor in the battery pack exceeding a preset temperature rise rate threshold.

11. The non-transitory computer-readable storage medium according to claim 9 , wherein the abnormal-voltage feature comprises the voltage sensor in the battery pack being disconnected, a current voltage of the voltage sensor in the battery pack being greater than a preset voltage upper limit, and a current voltage of the voltage sensor in the battery pack being less than a preset voltage lower limit.

12. The non-transitory computer-readable storage medium according to claim 9 , wherein the processor is further to perform: determining that no thermal runaway occurs in a case that the number of occurrences of the primary feature is equal to 0.