The present invention relates to a hearing device fuel cell power pack comprising a connector part of a connector assembly for exchanging fluids between the hearing device fuel cell power pack and a hearing device docking station, the connector part comprising a moveable valve piston being adapted to move between a closed valve position and an open valve position. The connector part forms part of a single-interface fuel cell connector assembly.

A battery includes a case and a battery core assembly disposed in the case, the battery core assembly includes a plurality of battery core groups and an receiving space holding the plurality of battery core groups, the battery core groups are connected in series, and the battery core group includes at least one battery core; a separator plate is disposed between at least two adjacent battery core groups, the separator plate divides the receiving space into a plurality of receiving cavities, each of the receiving cavities holds one or more battery core groups, and a cavity wall of the receiving cavity comprised by a connection of the separator plate and a separation membrane; and the battery further includes a liquid injection channel and the liquid injection channel in a sealed state, the liquid injection channel is disposed on at least one of the separation membranes and the separator plates.

The present disclosure provides a liquid injection device for injection of electrolytic solution into a bag-shaped film exterior containing a generation element.

The present invention relates to a secondary battery in which a stacked electrode assembly having a cathode, an anode and a separator is accommodated together with an electrolytic solution between exterior members. In the present invention, the secondary battery has a plurality of joint parts at which the outer peripheral portion of the separator is joined with the exterior members and a holding part formed at least between the joint parts so as to hold therein the electrolytic solution, wherein a sum of perimeters of the joint parts is longer than a perimeter of a rectangle of minimum area enclosing therein all of the joint parts. In this configuration, it is possible to refill the stacked electrode assembly with the electrolytic solution and protect the joint parts from breakage while preventing displacement of the stacked electrode assembly in the secondary battery.

The present invention relates to a secondary battery in which a stacked electrode assembly having a cathode, an anode and a separator is accommodated together with an electrolytic solution between exterior members. In the present invention, the secondary battery has a plurality of joint parts at which the outer peripheral portion of the separator is joined with the exterior members and a holding part formed at least between the joint parts so as to hold therein the electrolytic solution, wherein a sum of perimeters of the joint parts is longer than a perimeter of a rectangle of minimum area enclosing therein all of the joint parts. In this configuration, it is possible to refill the stacked electrode assembly with the electrolytic solution and protect the joint parts from breakage while preventing displacement of the stacked electrode assembly in the secondary battery.

Provided are a case assembly, a prismatic secondary battery, and a method of fabricating the prismatic secondary battery. The prismatic secondary battery includes: an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first and second electrode plates; a case formed of a first material, wherein an electrode assembly accommodation cavity is formed in the case to accommodate the electrode assembly, and an opening through which the electrode assembly is to be inserted is formed in a portion of the case; and a cap plate sealing the opening. A gas discharge hole is formed in the case to discharge gas generated during a pre-charging operation. The gas discharge hole is sealed with a gas seal formed of a second material.

A portable water-activated power generating device, comprising a first supporting structure, a second supporting structure, a first electrode plate, a second electrode plate, a water-absorbent sheet, and a soft container. The second electrode plate has a first surface and a second surface opposite the first surface, and the water-absorbent sheet surrounds the second electrode plate and is in contact with the first surface and the second surface. The soft container is used for accommodating the second electrode plate and the water-absorbent sheet. The first electrode plate and the soft container are disposed between the first supporting structure and the second supporting structure.

The present application relates to a secondary battery, including a naked battery core and a secondary battery head cover assembly. The secondary battery head cover assembly includes a head cover and an insulation structure. The insulation structure includes a top connection sheet and two naked battery core insulation sheets, and the two naked battery core insulation sheets are connected to two long sides of the top connection sheet, respectively. The top connection sheet is located below the head cover. The naked battery core is located below the top connection sheet. The head cover is provided with an explosion-proof valve, the top connection sheet is provided with an explosion-proof valve air hole, and the explosion-proof valve air hole is provided correspondingly below the explosion-proof valve.

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.

Provided is a battery pack including a pack case configured to form an exterior; a cell assembly accommodated in the pack case, and including a plurality of battery cells respectively including electrode leads; a pack cover configured to cover the pack case so as to package the cell assembly; and a lead connecting substrate provided between the cell assembly and the pack cover, configured to connect the electrode leads of the plurality of battery cells to one another, and including insert-molded terminals penetrating through the pack cover to be connected to an external power supply.