2 results about "Specific energy density" patented technology

This invention discloses a control method for laser-assisted winding of hydrogen cylinders. The method involves: collecting the temperature of the inner liner of the hydrogen cylinder using a temperature sensor and maintaining it within a preset range using heating or cooling devices; adjusting the braking device of the fiber unwinding device based on tension sensor data to stabilize fiber tension; obtaining the motor speed from the encoder and converting it into the fiber winding speed, which is then compared with a preset standard speed by the controller to adjust the motor drive voltage; controlling the laser emitting device to emit a laser beam of specific energy density, dynamically adjusting the emission direction and angle based on the rotation of the inner liner and the fiber position; monitoring the deformation of the inner liner using a displacement sensor, pausing and issuing an alarm if the deformation exceeds a threshold; and after winding is completed, using ultrasonic flaw detection, tensile testing, and appearance image analysis to inspect the quality of the hydrogen cylinder, reworking or marking any cylinders that do not meet standards, and recording all data for traceability and process optimization. This method effectively ensures the quality and performance of the hydrogen cylinders, meeting the needs of the hydrogen energy industry development.

The application provides a preparation method of an electrolyte additive, a high-voltage electrolyte containing the additive and a lithium battery, and belongs to the technical field of lithium batteries. The electrolyte additive is lithium aromatic carboxylate containing fluorine (cyano, fluorosulfonyl). The method is simple, efficient, low in raw material cost and suitable for large-scale preparation based on a simple acid-base neutralization reaction and filtration purification. The electrolyte additive prepared by the method and the electrolyte containing the additive can effectively improve the high-voltage stability of the lithium battery, significantly improve the cycle stability of the lithium battery at a high charging voltage of 4.5 V or above, and further improve the specific capacity and specific energy density of the lithium battery, so that the application prospect is very good, and the electrolyte additive can be expected to be used in the field of high-voltage electrolyte additives for lithium batteries.