Manufacturing method for energy storage element

Provided is a manufacturing method for an energy storage element. The manufacturing method includes the steps that firstly, a frame body is fixedly arranged on the top surface of a first plate electrode; secondly, a rubber frame located on the periphery of the frame body is fixedly arranged on the top surface of the first plate electrode, and the top surface of the rubber frame is higher than the top surface of the frame body; thirdly, under a vacuum environment, an electrolyte is filled into containing space defined by the rubber frame, the frame body and the first plate electrode in an enclosed mode to form a first unit; fourthly, a second unit is arranged on the top surface of the rubber frame and comprises a second plate electrode; fifthly, under the vacuum environment, the second unit is bonded to the rubber frame of the first unit, and thus the electrolyte is stored between the first plate electrode and the second plate electrode in a sealed mode. Therefore, the manufacturing method can prevent too much