A method for enhancing a lifetime of a lithium secondary battery including manufacturing a battery by injecting an electrolyte liquid to an electrode assembly-embedded battery; and charging and discharging the manufactured battery; and additionally injecting an electrolyte liquid earlier than half a cycle point with respect to the number of charge and discharge cycles reaching discharge capacity of 80% compared to initial capacity is provided.

Disclosed are a method for manufacturing a secondary battery and an auxiliary case configured for use during manufacturing of the secondary battery. A gas generated in the secondary battery may be discharged to prevent an electrode assembly and the secondary battery from increasing in thickness, and an electrolyte may be efficiently injected into the secondary battery. A method for manufacturing a secondary battery includes: an accommodation step of accommodating an electrode assembly into a battery case; a connection step of connecting an auxiliary case to the battery case, the auxiliary case having an inner space therein; an injection step of injecting an electrolyte into the battery case and the auxiliary case; an electrolyte supply step of moving some of the electrolyte from the auxiliary case into the battery case; and a gas supply step of moving a gas from the battery case into the auxiliary case.

In one example, a system for a flow cell for a flow battery, comprising: a first flow field; and a polymeric frame, comprising: a top face; a bottom face, opposite the top face; a first side; a second side, opposite the first side; a first electrolyte inlet located on the top face and the first side of the polymeric frame; a first electrolyte outlet located on the top face and the second side of the polymeric frame; a first electrolyte inlet flow path located within the polymeric frame and coupled to the first electrolyte inlet; and a first electrolyte outlet flow path located within the polymeric frame and coupled to the first electrolyte outlet. In this way, shunt currents may be minimized by increasing the length and/or reducing the cross-sectional area of the electrolyte inlet and electrolyte outlet flow paths.

In one example, a system for a flow cell for a flow battery, comprising: a first flow field; and a polymeric frame, comprising: a top face; a bottom face, opposite the top face; a first side; a second side, opposite the first side; a first electrolyte inlet located on the top face and the first side of the polymeric frame; a first electrolyte outlet located on the top face and the second side of the polymeric frame; a first electrolyte inlet flow path located within the polymeric frame and coupled to the first electrolyte inlet; and a first electrolyte outlet flow path located within the polymeric frame and coupled to the first electrolyte outlet. In this way, shunt currents may be minimized by increasing the length and/or reducing the cross-sectional area of the electrolyte inlet and electrolyte outlet flow paths.

Provided is an electricity storage device having a high volumetric energy density and high reliability. The electricity storage device includes: an electrode assembly including first and second electrode plates and a separator interposed therebetween; an exterior housing that houses the electrode assembly; a lid that covers an opening of the exterior housing; and electrode terminals that are electrically connected to the electrode assembly and partially protrude from the lid to the outside. The lid has a liquid injection hole for injecting an electrolytic solution into the exterior housing. A tubular member extending from the lid toward the electrode assembly is provided between the outer surface of the lid and the electrode assembly so as to surround an opening of the liquid injection hole. A covering member connected to the tubular member and interposed between the liquid injection hole and the electrode assembly is provided.

The invention relates to an energy storage module (100), which is produced by a continuous production method, and which comprises the following: a plurality of energy storage cells (10), electrically connected in series, and a housing (20), produced at least in regions and preferably completely from plastic, in which the plurality of energy storage cells (10) is received. A barrier layer is arranged between the housing (20) and the energy storage cells (10) at least in regions, preferably completely. The invention further relates to a production method of such an energy storage module (100), which is produced by means of a continuous production method.

A manufacturing method for a secondary battery and a manufacturing apparatus for a secondary battery that are applicable to a secondary battery in which an electrolyte solution injection hole has a diameter of 1.5 mm or more are provided. The secondary battery includes a battery case including a cover plate provided with an electrolyte solution injection hole, and a sealing member sealing the electrolyte solution injection hole. The manufacturing method includes a preparing step and a press-fitting step. The preparing step is preparing a cell in which, after an electrolyte solution is injected to the battery case through the electrolyte solution injection hole, the sealing member is disposed on the electrolyte solution injection hole. The press-fitting step is press-fitting the sealing member into the electrolyte solution injection hole while applying press-fitting load and ultrasonic vibration with a frequency of 20 kHz or more in parallel to a press-fitting direction.

A battery housing for a motor vehicle battery includes a housing for accommodating at least one battery cell in an interior space delimited by the housing; a drainage device communicates with the interior space; a detection device detects an air moisture content and/or a liquid fill level in the interior space; and an evaluation unit which is connected to the detection device. The evaluation unit is connected to the drainage device and the drainage device is designed to open and/or close in a manner dependent on the liquid fill level ascertained in the evaluation unit. By way of the linking of the drainage device to the detection device by way of the evaluation unit, it can be ensured that the drainage device is opened only in particularly expedient situations, such that good protection of a motor vehicle battery against moisture is made possible.

A battery housing for a motor vehicle battery includes a housing for accommodating at least one battery cell in an interior space delimited by the housing; a drainage device communicates with the interior space; a detection device detects an air moisture content and/or a liquid fill level in the interior space; and an evaluation unit which is connected to the detection device. The evaluation unit is connected to the drainage device and the drainage device is designed to open and/or close in a manner dependent on the liquid fill level ascertained in the evaluation unit. By way of the linking of the drainage device to the detection device by way of the evaluation unit, it can be ensured that the drainage device is opened only in particularly expedient situations, such that good protection of a motor vehicle battery against moisture is made possible.

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.