Flue gas detection system and flue gas detection method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYoshihiro Uchida, Kazuki Kubo, Nobuyuki Tanaka, Kenta Onishi, Yuki Moriya, Kiyohito Machida
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Abstract
A flue gas detection system includes: a temperature sensor configured to detect a temperature in a duct; a temperature sensor configured to detect a temperature in a duct; and an ECU. The ECU is configured to determine that a high-temperature gas is released from an assembled battery, when a period during which a temperature increase amount in the duct is more than a reference amount and a period during which a temperature increase amount in the duct is more than a reference amount are included in a predetermined period.
Claims8
A flue gas detection system provided in an assembled battery including a plurality of secondary batteries, each of the plurality of secondary batteries including a safety valve configured to release, to outside, a gas internally generated, the flue gas detection system comprising:
- a first temperature sensor configured to detect a temperature of a first region in a path in which the gas released from the assembled battery flows;
- a second temperature sensor configured to detect a temperature of a second region different from the first region in the path;
- and
- an electronic control unit programmed to:
- obtain a temperature of the first region from the first temperature sensor and calculate a temperature increase amount since a previous temperature was obtained from the first temperature sensor;
- calculate a first time period during which the temperature increase amount of the first region is more than a first reference amount;
- obtain a temperature of the second region from the second temperature sensor and calculate a temperature increase amount since a previous temperature was obtained from the second temperature sensor;
- calculate a second time period during which the temperature increase amount of the second region is more than a second reference amount;
- determine whether the first time period and the second time period occur within a predetermined time period;
- based upon a result that the first time period and the second time period occur within the predetermined time period, determine that the gas has been released from the assembled battery.
A method for detecting a flue gas from an assembled battery including a plurality of secondary batteries, each of the plurality of secondary batteries being configured to release, to outside, a gas internally generated, the method comprising:
- detecting, by a first temperature sensor, a temperature of a first region in a path in which the gas released from the assembled battery flows;
- calculating a temperature increase amount of the first region since a previous temperature was obtained from the first temperature sensor;
- calculating a first time period during which the temperature increase amount of the first region is more than a first reference amount;
- detecting, by a second temperature sensor, a temperature of a second region different from the first region in the path;
- calculating a temperature increase amount of the second region since a previous temperature was obtained from the second temperature sensor;
- calculating a second time period during which the temperature increase amount of the second region is more than a second reference amount;
- determining whether the first time period and the second time period occur within a predetermined time period;
- based upon a result that the first time period and the second time period occur within the predetermined time period, and determining that the gas is released from the assembled battery.
Dependencies are inferred from the claim text.