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The application discloses a method and device for precisely adjusting atomization quantity of an ultrasonic humidifier, and relates to the technical field of ultrasonic humidification atomization and air conditioning. The method comprises the following steps: S1, supplying power to E transducers in the ultrasonic humidifier one by one, and the atomization quantity of the ultrasonic humidifier increases with the increase of the number of the powered transducers until all the E transducers are powered; S2, after all the E transducers in the ultrasonic humidifier are powered, gradually increasing the power supply voltage of the transducers, and the atomization quantity of the ultrasonic humidifier increases with the increase of the power supply voltage until the power supply voltage increases to a nominal value, at which time the atomization quantity of the ultrasonic humidifier reaches the nominal value. The application realizes the precise adjustment of the atomization quantity of the ultrasonic humidifier by using the coupling strategy of the number grading control of the transducers and the power supply voltage adjustment of the transducers.

This utility model relates to a battery rack and an energy storage device, the energy storage device including a battery rack. The battery rack includes: a base, abutting against a mounting surface, the base having a through hole; and a gap adjustment mechanism, including a gap adjustment component and a gap adjustment assembly. The gap adjustment component is slidably disposed within the through hole, and has an adjustment channel. The adjustment channel has a large-diameter end located away from the mounting surface. The gap adjustment assembly is screwed onto the base, and has an adjustment cone. The gap adjustment assembly is inserted into the adjustment channel. When the gap adjustment assembly rotates on the base, it causes the adjustment cone to insert into or retract from the adjustment channel. In this way, the gap adjustment component can pass through the through hole and abut against the mounting surface, completely eliminating the fit gap between the base and the mounting surface, thereby solving the problem of battery rack wobbling caused by gaps, improving the installation stability and safety factor of the product.