Abstract: The invention discloses a power generating device and an operation method thereof based on ocean temperature difference, which belong to the field of ocean energy utilization, and include a negative thermal expansion body, a rope and a generator. The negative thermal expansion body is connected to the rope, and the rope is connected to the generator simultaneously. The negative thermal expansion body is in a contracted state when in the hotter upper seawater close to the sea surface, and the difference obtained by deducting buoyancy from gravity is relatively large. The negative thermal expansion body is in an expanded state when in colder deep seawater, and the difference obtained by deducting buoyancy from gravity is relatively small. The unbalanced force on the rope will drive the rope to move, and the generator will be driven to generate power through the rope.

Abstract: The invention discloses a power generating device and an operation method thereof based on ocean temperature difference, which belong to the field of ocean energy utilization, and include a negative thermal expansion body, a rope and a generator. The negative thermal expansion body is connected to the rope, and the rope is connected to the generator simultaneously. The negative thermal expansion body is in a contracted state when in the hotter upper seawater close to the sea surface, and the difference obtained by deducting buoyancy from gravity is relatively large. The negative thermal expansion body is in an expanded state when in colder deep seawater, and the difference obtained by deducting buoyancy from gravity is relatively small. The unbalanced force on the rope will drive the rope to move, and the generator will be driven to generate power through the rope.

Abstract: An ultrasonic scanning device includes at least one pair of cylindrical rollers. The axes of each pair of cylindrical rollers are parallel to each other. A liquid for transmitting the ultrasound is stored in each cylindrical roller. In use, a pair of cylindrical rollers rotate around their respective axes in reverse directions, the test subject passes between the pair of cylindrical rollers and is tested by ultrasound. The ultrasonic scanning device can be applied in the field of lithium-ion battery testing. The internal flaws and health status of the lithium-ion battery can be determined by acquiring an ultrasonic image in the test subject. The device of the present invention has a simple structure and an ingenious conception, and is ready-to-use and less expensive, which is successfully applied in the field of lithium-ion battery testing.

Abstract: An ultrasonic scanning device includes at least one pair of cylindrical rollers. The axes of each pair of cylindrical rollers are parallel to each other. A liquid for transmitting the ultrasound is stored in each cylindrical roller. In use, a pair of cylindrical rollers rotate around their respective axes in reverse directions, the test subject passes between the pair of cylindrical rollers and is tested by ultrasound. The ultrasonic scanning device can be applied in the field of lithium-ion battery testing. The internal flaws and health status of the lithium-ion battery can be determined by acquiring an ultrasonic image in the test subject. The device of the present invention has a simple structure and an ingenious conception, and is ready-to-use and less expensive, which is successfully applied in the field of lithium-ion battery testing.

Abstract: The present invention discloses a method and device for monitoring state of charge and state of health of a battery, and relates to the technical field of battery. The method comprises: firstly, passing ultrasonic waves through a lithium-ion battery in different SOCs at different charging and discharging currents to obtain acoustic parameters, and then establishing respective corresponding relationships between the acoustic parameters and the lithium-ion battery SOC and SOH; and secondly, monitoring the acoustic parameters of a lithium-ion battery, and then estimating SOC and SOH of the lithium-ion battery by combining the monitored acoustic parameters with the respective corresponding relationships between the acoustic parameters and the lithium-ion battery SOC and SOH. The invention further provides a device implementing the above method. The method and device can monitor the battery SOC and SOH in a brand new way different from the electricity parameter measurement.

Abstract: The present invention discloses a method and device for monitoring state of charge and state of health of a battery, and relates to the technical field of battery. The method comprises: firstly, passing ultrasonic waves through a lithium-ion battery in different SOCs at different charging and discharging currents to obtain acoustic parameters, and then establishing respective corresponding relationships between the acoustic parameters and the lithium-ion battery SOC and SOH; and secondly, monitoring the acoustic parameters of a lithium-ion battery, and then estimating SOC and SOH of the lithium-ion battery by combining the monitored acoustic parameters with the respective corresponding relationships between the acoustic parameters and the lithium-ion battery SOC and SOH. The invention further provides a device implementing the above method. The method and device can monitor the battery SOC and SOH in a brand new way different from the electricity parameter measurement.