An electricity storage device includes a first electrode sheet, separators, and a second electrode sheet. The separators each include primary protrusions, which are located on the opposite sides of the first electrode sheet and protrude from the first electrode sheet, and secondary protrusions, which are located on the opposite sides of the first electrode sheet and protrude from the first electrode sheet in a direction different from the protrusion direction of the primary protrusions. The primary protrusions are welded to each other in a first weld region, and the secondary protrusions are welded to each other in a second weld region. The region width of the first weld region in the protrusion direction of the primary protrusions is greater than the region width of the second weld region in the protrusion direction of the secondary protrusions.

Provided is a multilayer cable-type secondary battery including: a first electrode assembly including one or more first inner electrodes, a first separation layer surrounding outer surfaces of the first inner electrodes to prevent short circuit of electrodes and a sheet-type first outer electrode spirally wound to surround the first separation layer; a third separation layer surrounding the first electrode assembly to prevent short circuit of electrodes; and a second electrode assembly including one or more second inner electrodes surrounding an outer surface of the third separation layer, a second separation layer surrounding outer surfaces of the second inner electrodes to prevent short circuit of electrodes and a sheet-type second outer electrode spirally wound to surround the second separation layer.

The present invention relates to a method of manufacturing an electrode assembly, the method including: preparing an electrode laminate including at least one negative electrode, at least one positive electrode, and at least one separation film; generating a separation film assembly by bonding remaining portions of the separation film positioned in regions not corresponding to shapes of the negative electrode and the positive electrode; and cutting the separation film assembly so as to correspond to the shapes of the negative electrode and the positive electrode, and an electrode assembly manufactured by the method.

Pressure relief mechanisms can provide an outlet for cathode pressure buildup during battery operation. Mechanical cathode modifications can control cathode interfaces during battery operation. Pressure relief mechanisms and mechanical modifications can be utilized to improve performance, longevity and/or to prevent failure of batteries, such as during cycling of liquid metal batteries.

A battery system (BS), containing at least one battery device (BV) and at least one operating device (BTV) for operation of the battery system (BS) and/or of the at least one battery device (BV), and at least one further device (V), wherein the at least one further device (V) is intended to create a physical distance between two component parts of the battery system (BS) and in particular between the at least one battery device (BV) and a further component (K) of the battery system (BS), or between at least two component parts of the at least one battery device (BV), wherein the at least one operating device (BTV) is arranged at least partially within the at least one further device (V).

A motor vehicle battery module, in particular for an electric or hybrid vehicle, includes at least two battery cells which are situated laterally next to one another and form a battery pack, two pressure plates which are situated on opposite sides of the battery pack, and at least one spacer element which has a first bearing surface by which the at least one spacer element bears against a side surface of an adjoining battery cell. The pressure plates are arranged in such a way that the at least two battery cells are arranged between the two pressure plates. The bearing surface is smaller than the side surface, which adjoins the spacer element, of the adjoining battery cell, and therefore part of the side surface is unsupported.

Improved battery separators, base films or membranes, batteries, cells, devices, systems, vehicles, and/or methods of making and/or using such separators, films or membranes, batteries, cells, devices, systems, vehicles, and/or methods of enhancing battery or cell charge rates, charge capacity, and/or discharge rates, and/or methods of improving batteries, systems including such batteries, vehicles including such batteries and/or systems, and/or the like; biaxially oriented porous membranes, composites including biaxially oriented porous membranes, biaxially oriented microporous membranes, biaxially oriented macroporous membranes, battery separators with improved charge capacities and the related methods and methods of manufacture, methods of use, and the like; flat sheet membranes, liquid retention media; dry process separators; biaxially stretched separators; dry process biaxially stretched separators having a thickness range between about 5 μm and 50 μm, preferably between about 10 μm and 25 μm, having improved strength, high porosity, and unexpectedly and/or surprisingly high charge capacity, such as, for example, high 10 C rate charge capacity; separators or membranes with high charge capacity and high porosity, excellent charge rate and/or charge capacity performance in a rechargeable and/or secondary lithium battery, such as a lithium ion battery, for high power and/or high energy applications, cells, devices, systems, and/or vehicles, and/or the like; single or multiple ply or layer separators, monolayer separators, trilayer separators, composite separators, laminated separators, co-extruded separators, coated separators, 1 C or higher separators, at least 1 C separators, batteries, cells, systems, devices, vehicles, and/or the like; improved microporous battery separators for secondary lithium batteries, improved microporous battery separators with enhanced or high charge (C) rates, discharge (C) rates, and/or enhanced or high charge capacities in or for secondary lithium batteries, and/or related methods of manufacture, use, and/or the like, and/or combinations thereof are disclosed or provided.

A battery includes a cylindrical battery case and an electrode group including a positive electrode, a negative electrode, and a separator. The electrode group and the battery case define a space communicated from a top to a bottom, and one of the positive electrode and the negative electrode has a current collecting terminal that extends from the electrode group in a direction away from a center axis of the battery case and is in contact with a bottom surface of the battery case.

A battery pack includes: a plurality of battery cells (1); a cell support that holds the plurality of battery cells; a connection part (6) that connects to the plurality of battery cells; and a circuit substrate (8) that is used to mount circuits for the plurality of battery cells. The cell support (2) is integrally formed with battery cell storage units (3) that store the plurality of battery cells, a base unit (4) that supports the battery cell storage units, and impact relaxation ribs (21), and each of the impact relaxation ribs is formed between an outer circumference of the base unit and an exterior surface of each of the battery cell storage units, and is configured in a shape capable of being transformed in a direction to which impact is applied.

This invention relates to the formation of standby structural composite electrical energy storage devices, and a method of producing same. The device may be a standby battery or supercapacitor with first and second electrodes which are separated by a separator structure, wherein the device contains an electrolyte retained in a reservoir. The use of at least one valve allows the addition, removal of electrolyte fluids, and venting of any outgassing by products.