A cell includes an electrode assembly, a pin assembly, and a cell house. The electrode assembly includes a central hole, at least one positive electrode, at least one negative electrode, and at least one diaphragm separating the at least one positive electrode from the at least one negative electrode. The at least one positive electrode, the at least one negative electrode and the at least one diaphragm are disposed around the central hole in a spiral winding manner. The pin assembly is disposed in the central hole for polarity separation. The pin assembly includes a housing including an axial through hole; the housing is partially or fully disposed in the central hole. The pin assembly further includes an insulating part for separating the polarity of the cell and at least one electrode lead. The cell house is hermetically connected to the housing.

Embodiments of the present invention provides a pouch film. In manufacturing a secondary battery, a gas may be generated when reacting an electrode assembly with an electrolyte. After the generated gas is discharged, the pouch film may be sealed. In this case, a deformation part may be formed in the gas chamber section which serves as a passage for discharging the gas, specifically, in the gas chamber passage, thus to prevent the electrolyte from flowing backward and maintain shapes of the gas chamber inlet during injecting the electrolyte.

A liquid injection apparatus (1) includes: a first measuring unit (10a) including a first measuring space (13a) inside a first cylinder (11a) and a first piston (12a) moving in the first measuring space (13a); a second measuring unit (10b) including a second measuring space (13b) inside a second cylinder (11b) and a second piston (12b) moving in a second measuring space (13b); a first dispenser (20a) that injects a liquid (19) into a first vessel (90a); a second dispenser (20b) that injects the liquid into a second vessel (90b); a driving mechanism (30) that operates the first piston and the second piston in synchronization; and a first stroke conversion mechanism (60a) which is disposed between the first piston and the driving mechanism, and independently converts a first stroke of the driving mechanism and transmits the converted first stroke to the first piston to control an amount of movement of the first piston independently of an amount of movement of the second piston.

A refuelable electrochemical battery or cell is provided that features three phases of operation that repeat cyclically. In an intake phase, electrochemically active particles that are at least partially magnetic and a suitable electrolyte are admitted or fed into a cell cavity. In a power phase, oxidation and reduction reactions produce electrical energy while an electromagnet and/or permanent magnet attract the particles toward one electrode. A gas-diffusion membrane permeable by oxygen operates in conjunction with another electrode. During the exhaust phase, a piston forces residue of the reaction from the cavity to prepare for the next cycle of operation.

A refuelable electrochemical battery or cell is provided that features three phases of operation that repeat cyclically. In an intake phase, electrochemically active particles that are at least partially magnetic and a suitable electrolyte are admitted or fed into a cell cavity. In a power phase, oxidation and reduction reactions produce electrical energy while an electromagnet and/or permanent magnet attract the particles toward one electrode. A gas-diffusion membrane permeable by oxygen operates in conjunction with another electrode. During the exhaust phase, a piston forces residue of the reaction from the cavity to prepare for the next cycle of operation.

The present application provides an end cover assembly, a secondary battery, a battery module, a device, a liquid-injection method and a device thereof. The end cover assembly for the secondary battery includes: an end cover, provided with a through hole for injecting electrolyte, and including a connecting portion; a sealing assembly, configured to seal the through hole; a locking-fixing member, configured to be movable relative to the connecting portion in a radial direction of the through hole, so as to realize switching between a locked state and an unlocked state of the locking-fixing member and the connecting portion. In the locked state, the locking-fixing member presses against the sealing assembly to restrict the end cover to be separated from the sealing assembly; in the unlocked state, the end cover and the sealing assembly are separable to allow electrolyte to be injected from the through hole.

An electrolyte level measuring device for a vented lead acid battery and a method of monitoring an electrolyte level is provided. The measuring device includes an elongated body. A stop member extends outwardly from the elongated body, the stop member being sized larger than an opening in the vented lead acid battery. At least one projection extends orthogonally from the elongated body.

An electrolyte level measuring device for a vented lead acid battery and a method of monitoring an electrolyte level is provided. The measuring device includes an elongated body. A stop member extends outwardly from the elongated body, the stop member being sized larger than an opening in the vented lead acid battery. At least one projection extends orthogonally from the elongated body.

An electrochemical voltage source has an anode containing lithium, a cathode containing manganese oxide, and a housing. The cathode and the anode are arranged in an interior of the housing and are arranged opposite one another. An electrolyte reservoir in the form of a compressible storage body, which receives an electrolyte, is arranged between the anode and the cathode. The storage body has a first side resting against an end face of the cathode and a second side, which faces away from the first side, and rests against an end face of the anode. The cathode experiences an increase in volume when the voltage source is discharged. The anode experiences a decrease in volume during the discharge. During the discharge, the absolute value of the volume increase of the cathode is at least as great as the absolute value of the volume decrease of the anode.

A metal-air battery includes a metal negative electrode (12), an oxygen-generating electrode placed on a surface of the metal negative electrode, and an air electrode placed on another surface of the metal negative electrode. The metal negative electrode includes at least a negative electrode active material layer facing the oxygen-generating electrode. A first separator placed in contact with the negative electrode active material layer is placed between the negative electrode active material layer and the oxygen-generating electrode.