An all solid state battery in which positional displacement of a plurality of cells arranged along a thickness direction can be prevented is provided. The all solid state battery includes a plurality of cells connected in series, wherein the all solid state battery includes a cell unit A and a cell unit B, a first current collector A in the cell A and a second current collector B in the cell B are arranged to face each other, the first current collector A includes a tab A, the second current collector B includes a tab B, and the tab A and the tab B are fixed by a fixing portion.

Battery core packs employing minimum cell-face pressure containment devices and methods are disclosed for minimizing dendrite growth and increasing cycle life of metal and metal-ion battery cells.

Disclosed is a negative electrode for a secondary battery, the negative electrode including: a negative electrode current collector; and a negative electrode mixture layer provided on the negative electrode current collector. The negative electrode mixture layer contains a graphite powder and a polymer electrolyte. A powder compact spring-back ratio of the graphite powder is 15 to 35%. Furthermore, disclosed is a secondary battery including: a positive electrode; the above-described negative electrode; and an electrolyte layer provided between the positive electrode and the negative electrode. Further, disclosed is a negative electrode material for a secondary battery, the negative electrode material containing a graphite powder and a polymer electrolyte.

A lithium-ion battery system which can appropriately determine the presence or absence of an abnormality of a unit cell. It is provided with an assembled battery formed by stacking a plurality of battery units, each of the plurality of battery units including a unit cell consisting of a lithium-ion battery and a signal output part provided in the unit cell; a signal receiving part for receiving an optical signal output by the signal output part in each of the plurality of battery units; an analysis processing part for analyzing the optical signal received by the signal receiving part; and a state determination part for determining that the assembled battery is abnormal in accordance with the analysis result of the analysis processing part.

The present invention provides a sequential and efficient method of assembling a battery with a desired number of layers while reliably separating positive and negative electrode sides from each other with one or more separator structures. According to the invention, the method of assembling a battery includes stacking one or multiple combinations each comprising a frame and a positive electrode plate to be disposed in a region defined by the frame and one or multiple combinations each comprising a frame and a negative electrode plate to be disposed in a region defined by the frame, once or alternately, such that the positive and adjacent negative electrode plates are separated from each other by a separator structure and the periphery of the separator structure is held between the adjacent frames. The separator structure includes a separator exhibiting hydroxide ion conductivity and water impermeability.

A battery pack includes a plurality of battery modules that includes a plurality of battery cells, a battery cell holder, a second-electrode assembly including a plurality of second-electrode bus bar plates, a first-electrode assembly, and a cover. The first-electrode assembly includes a plurality of first-electrode bus bar plates, a first-electrode terminal, a second-electrode terminal connected to one of the plurality of second-electrode bus bar plates, and an inter-electrode bus bar connecting the second-electrode bus bar plate and one of the first-electrode bus bar plate and the first-electrode terminal. The first-electrode assembly is in a first pattern or a second pattern. An arrangement of the first-electrode terminal and the second-electrode terminal in the battery module differs according to the pattern of the first-electrode assembly.

The present disclosure relates to a method for manufacturing a secondary battery including a gel polymer electrolyte and a secondary battery obtained thereby. The method can inhibit thermal crosslinking of a gel polymer electrolyte during the wetting with an electrolyte, and facilitate thermal crosslinking after the wetting with an electrolyte is finished. In addition, the method can increase uniformity of thermal crosslinking by controlling the oxygen content in a cell.

The method of manufacturing a secondary battery includes a layering step of forming an electrode body in which positive electrode plates and negative electrode plates are alternately layered with separators interposed in between, the layering step includes, a step of preparing a negative electrode sheet having negative electrode active material layers formed on two surfaces of a negative electrode core body, a step of forming a layered sheet by adhering a first separator and a second separator on two surfaces of the negative electrode sheet with adhesion layers in between, the layered sheet including the first separator, the negative electrode sheet, and the second separator, a step of forming a layered body by cutting the layered sheet, the layered body having two surfaces of the negative electrode plates sandwiched between the first and second separators, and a step of forming the electrode body using the layered body.

The present disclosure relates to the technical field of battery, and particularly to a battery module. The battery module includes a case body having a cavity, a plurality of battery units accommodated in the cavity of the case body, an output electrode assembly disposed on the case body and electrically connected to output terminals of the plurality of battery units, and an end cap connected to the case body and arranged to press and cover at least a part of the output electrode assembly. The battery module according to the present disclosure has a sound design, through which the airtightness of the output electrode assembly is not liable to be broken during the running of the vehicle.

An all solid state battery in which positional displacement of a plurality of cells arranged along a thickness direction can be prevented is provided. The all solid state battery includes a plurality of cells connected in series, wherein the all solid state battery includes a cell unit A and a cell unit B, a first current collector A in the cell A and a second current collector B in the cell B are arranged to face each other, the first current collector A includes a tab A, the second current collector B includes a tab B, and the tab A and the tab B are fixed by a fixing portion.