An electrochemical cell has a prismatic cell housing and an electrode assembly disposed in the cell housing. The cell housing is six-sided and includes a first end, a second end, and a sidewall that extends between the first and second ends. The sidewall includes a pair of major sides joined by a pair of minor sides, where each side of the pair of major sides is larger in area than each side of the pair of minor sides. The electrode assembly includes positive electrode plates alternating with negative electrode plates and separated by at least one separator to form an electrode stack. The electrode stack is oriented within the cell housing such that a stack axis that extends parallel to a stacking direction of the positive and negative electrode plates is normal to, and passes through, each side of the pair of minor sides.

Power source device includes: battery stack including a plurality of battery cells stacked; a plurality of bus bars that connect electrode terminals to each other; bus bar holder that holds the plurality of bus bars; and duct plate disposed on an upper surface of bus bar holder and defining gas duct. Bus bar holder is divided into a plurality of sub-holders, duct plate forms elongated hole screwed with one of the plurality of sub-holders, each of the plurality of sub-holders forms support surface longer than elongated hole and coupling part opened in support surface at a position corresponding to elongated hole, and duct plate is screwed to coupling part through elongated hole to couple the plurality of sub-holders and duct plate in a state where duct plate is placed on support surface with duct plate straddling the plurality of sub-holders divided.

A battery module having first and second cylindrical battery cells is provided. The module includes a laminated busbar assembly having a bottom isolation layer, a busbar layer, a top isolation layer. A first aperture of the bottom isolation layer receives a positive electrode of the first battery cell therethrough and exposes a portion of the negative electrode of the first battery cell. The second aperture of the bottom isolation layer receives the positive electrode of the second battery cell therethrough and exposes a portion of the negative electrode of the second battery cell. The busbar layer has a first layer portion that contacts the negative electrode of the first battery cell and the negative electrode of the second battery cell, and a second layer portion that contacts the positive electrode of the first battery cell and the positive electrode of the second battery cell.

A battery module having first and second cylindrical battery cells is provided. The module includes a laminated busbar assembly having a bottom isolation layer, a first busbar layer, an intermediate isolation layer, and a second busbar layer. The bottom isolation layer has a first aperture that receives the positive electrode of the first battery cell therethrough and exposes a portion of the negative electrode of the first battery cell. The first busbar layer has a first aperture that receives the positive electrode of the first battery cell therethrough. A portion of the first busbar layer electrically contacts the negative electrode of the first battery cell. The intermediate isolation layer has a first aperture that receives the positive electrode of the first battery cell therethrough. The second busbar layer electrically contacts the positive electrode of the first battery cell.

A connecting structure uses a crimp terminal to connect a bus bar and an electrical wire together. The crimp terminal includes a bus bar-connecting section to be crimped to the bus bar, and an electrical wire-connecting section to be crimped to an end of the electrical wire. At least one of the bus bar-connecting section and the electrical wire-connecting section is provided with an oxide film breaking means for breaking an oxide film on the bus bar or a core wire on the end of the electrical wire.

The invention relates to an energy storage device and a method for operating an energy storage device comprising a plurality of energy storage modules. In order to adjust the output voltage to the energy storage device, one or more energy storage modules is/are connected in series. According to the invention, the series-connected energy storage modules are selected in accordance with the state of charge and at least one other operating parameter in order to be able to use the individual energy storage modules in a particularly efficient manner.

A storage battery device includes: a cell unit including a plurality of battery cells; an electric flow path material that forms a current path through which electric power is supplied from or to the battery cells; and a radiator thermally coupled to the current-path member.

An electricity storage module includes a power storage element group obtained by stacking a plurality of power storage elements each having a lead terminal that protrudes from a side edge. The lead terminals are each provided with a terminal connection portion for electrically connecting the lead terminals that are adjacent in a direction in which the power storage elements are stacked, and a detection terminal portion that is electrically connectable to a device for detecting and controlling states of the respective power storage element.

The present disclosure relates to an electrochemical stack assembly including an enclosure in which a plurality of cells arranged in a reference direction are disposed, the enclosure including an opening, an enclosure cover seated on the enclosure to cover the opening and a fastening member passing through a first hole of the enclosure and a second hole of the enclosure cover to fasten the enclosure and the enclosure cover to each other, wherein a size of the second hole is different from a size of the first hole.

A battery device and a battery connection module are provided. The battery device includes a pack, a connection module, a management circuit board and an electrical connecting unit. The connection module includes an insulating frame having an assembling side, electrode connecting members, extension terminals and an adapter circuit board. The connecting members are provided to the frame and connect the electrode of the pack. The terminals are provided to the frame and respectively correspond to the connecting members. Each terminal has a fixed segment embedded to the frame, an internal connection segment exposed to the frame and connected with the corresponding connecting member and an external connecting segment extending out of the side of the frame. The adapter circuit board is fixed to the side of the frame and connects with the external connecting segments of the terminals. The connecting unit connects the management and adapter circuit boards.