Monitoring and early warning system for power lithium ion battery transport case and monitoring and early warning method

A multi-information monitoring-based transported battery thermal runaway early warning method based on a monitoring and early warning system installed in a transport case:

• comprising the following steps:
• S1:
• placing a lithium ion battery in the transport case, and performing temperature, vibration, impact, and humidity processing on the transport case;
• S2:
• monitoring temperature, gas, smoke, and pressure in the transport case through sensors of a monitoring unit;
• S3:
• obtaining various feature parameters of lithium ion battery risks, and normalizing acquired data;
• S4:
• performing risk classification by monitoring multi-information state data of the lithium ion battery, and calculating feature parameter thresholds of lithium ion battery thermal runaway risks under different transport conditions;
• S5:
• inputting quantified feature values into a clustering algorithm to quantify lithium ion battery thermal runaway risk levels;
• S6:
• establishing, to improve risk identification accuracy and prevent a risk false alarm, a data balancing-ensemble learning algorithm to construct a thermal runaway risk identification model of the power lithium ion battery in the transport case;
• and
• S7 setting, through the thermal runaway risk identification model of the power lithium ion battery under the transport conditions, a dynamic threshold and a second-level early warning process, and reporting, if it is identified that there is a thermal runaway risk of the lithium ion battery, an early warning signal to a backend;
• wherein the monitoring and early warning system comprises the monitoring unit, a data processing unit, a data transmission unit, a power supply unit, a display unit, and a response unit;
• sensors of the monitoring unit comprise temperature sensors, gas sensors, pressure sensors, and smoke sensors;
• the monitoring unit is deployed on a lower surface of a case cover, and a sensing apparatus adopts a distributed design and is equipped with the temperature sensors, the gas (H2, CO sensors, the smoke sensors, and the pressure sensors;
• the data processing unit is arranged on an inner side of the case cover;
• the display unit comprises a display panel and a display light;
• the display unit is arranged on an outer side of the case cover;
• the display panel is able to display battery temperature, gas concentration, smoke concentration, and pressure inside the transport case;
• the display light emits a photoelectric alarm when determining that thermal runaway of the lithium ion battery occurs;
• the power supply unit is a lithium ion battery pack;
• the power supply unit is arranged on the inner side of the case cover to supply power to the monitoring and early warning system;
• the data transmission unit comprises a 4G module and WIFI;
• the data transmission unit and the data processing unit are integrated in one housing;
• the response unit comprises a release box and alarm information issued by a platform;
• when the monitoring and early warning system determines that thermal runaway occurs in the transport case, the release box is opened through an electrical signal, and fire extinguishing material placed in the release box falls to suppress battery flames;
• the monitoring and early warning system sends the alarm information to a terminal.