A method of manufacturing a lithium ion secondary battery includes: manufacturing an electrode assembly including a positive electrode layer, a separator, and a negative electrode layer; encapsulating the electrode assembly and an electrolytic solution in an exterior body; assembling a battery cell; alternately laminating a bag-shaped member and the battery cell; and performing initial charging until an initial charging voltage is reached while constraining the battery cell at a constant pressure along a stacking direction of the battery cell, wherein the bag-shaped member is encapsulated with a fluid.

A method of manufacturing a lithium ion secondary battery includes: manufacturing an electrode assembly including a positive electrode layer, a separator, and a negative electrode layer; encapsulating the electrode assembly and an electrolytic solution in an exterior body; assembling a battery cell; alternately laminating a bag-shaped member and the battery cell; and performing initial charging until an initial charging voltage is reached while constraining the battery cell at a constant pressure along a stacking direction of the battery cell, wherein the bag-shaped member is encapsulated with a fluid.

A battery arrangement for a motor vehicle, the battery arrangement has a high voltage battery which has a battery housing and several battery cells in the battery housing, and a flooding device for flooding the high voltage battery. The flooding device has at least one supply connection, and the battery arrangement is formed to introduce a cooling medium supplied to the at least one supply connection into the battery housing. Furthermore, the flooding device includes at least one drain through which cooling medium supplied to the battery housing can be guided out of the battery arrangement.

A vehicle battery cooling device adapted to cool a battery pack including a plurality of unit batteries includes: a case that contains a cooling fluid for cooling the battery pack; a pipe which runs inside the case and in which a cooling medium for cooling the cooling fluid is caused to flow; and a control valve that is provided in the pipe and discharges the cooling medium in the case in accordance with a temperature of the battery pack.

A vehicle battery cooling device adapted to cool a battery pack including a plurality of unit batteries includes: a case that contains a cooling fluid for cooling the battery pack; a pipe which runs inside the case and in which a cooling medium for cooling the cooling fluid is caused to flow; and a control valve that is provided in the pipe and discharges the cooling medium in the case in accordance with a temperature of the battery pack.

A battery module includes a cell stack defined by a stack of a plurality of battery cells; and a module housing configured to accommodate the cell stack. The module housing has a lower housing, a pair of side housings, a pair of front and rear housings, and an upper housing. The lower housing may include a base plate configured to cover a lower surface of the cell stack; a spacer interposed between the cell stack and the base plate to partially cover the lower surface of the cell stack; a supply tube connected to the spacer to supply a cooling medium through the inside of the spacer to an empty space defined between the cell stack and the base plate; and a discharge tube connected to the spacer to discharge the cooling medium from the empty space and the spacer.

A battery module includes a cell stack defined by a stack of a plurality of battery cells; and a module housing configured to accommodate the cell stack. The module housing has a lower housing, a pair of side housings, a pair of front and rear housings, and an upper housing. The lower housing may include a base plate configured to cover a lower surface of the cell stack; a spacer interposed between the cell stack and the base plate to partially cover the lower surface of the cell stack; a supply tube connected to the spacer to supply a cooling medium through the inside of the spacer to an empty space defined between the cell stack and the base plate; and a discharge tube connected to the spacer to discharge the cooling medium from the empty space and the spacer.

There is provided a highly reliable storage battery apparatus which can diagnose the status of a temperature detection unit and a cooling unit. In the storage battery apparatus comprising a battery module including one or more batteries, a plurality of temperature detection units and a cooling unit cooling the battery module, the temperature detection units measure, at least, the temperature of the cooling medium inputted to the storage battery apparatus, the temperature of the cooling medium outputted from the storage battery apparatus, and the temperature of at least one of the batteries and the battery module.

An onboard battery for a vehicle includes battery modules including battery cells disposed in a predetermined state, and a cell cover in which the battery cells are disposed. A part of an internal space of the cell cover is formed as chambers into which cooling air is sent. The onboard battery also includes a housing case that houses the battery modules, an intake duct that sends the cooling air into the battery modules, and an exhaust duct that discharges the cooling air sent into the battery modules. A heater that heats the battery cells is disposed in one of the chambers. A heat sink located opposite to the battery cells and attached to the heater is disposed in the one of the chambers.

The invention relates to the use of a nanoparticle composition as a heat transfer fluid in battery or other electrical equipment systems. The electrical equipment can be in particular electric batteries, electric motors, electric vehicle transmissions, electric transformers, electric capacitors, fluid-filled transmission lines, fluid-filled power cables, computers and power electronics such as electric power converters.