A battery system includes a battery assembly and an equipment interface. The battery assembly includes a battery pack, a battery housing enclosing the battery pack, a communication gateway, and a first electrical connector. The battery pack includes rechargeable battery cells. The communication gateway is configured to communicate using a first communication protocol and a second communication protocol different from the first communication protocol. The first electrical connector includes a plurality of first terminals. The equipment interface is configured to be coupled to a piece of equipment, and includes a second electrical connector including a plurality of second terminals. The second electrical connector is configured to mate with the first electrical connector to electrically coupled the plurality of first terminals with the plurality of second terminals to electrically couple the battery assembly to the equipment interface.

Discussed are a battery pack including a cell stack structure using a flexible printed circuit board (FPCB), and more specifically, to a battery pack that forms various stack structures by connecting battery cells through an FPCB and stacking the battery cells in a desired stacked state. The battery pack includes at least two or more stacked battery cells; a flexible printed circuit board (FPCB) configured to electrically interconnect the battery cells; and a battery protection circuit configured to protect the battery cells, wherein the FPCB comprises a cell connection part connecting the battery cells in a predetermined connection state.

An electrochemical energy storage cell includes a first electrically insulating substrate and a first electrical conductor layer extending on an area of the first electrically insulating substrate, a second electrically insulating substrate and a second electrical conductor layer extending on an area of the second electrically insulating substrate, a first electrode layer composed of positive electrode material, a second electrode layer composed of negative electrode material, a first separator layer, a stacked arrangement of the layers: the first electrically insulating substrate—the first electrical conductor layer—the first electrode layer—the first separator layer—the second electrode layer—the second electrical conductor layer—the second electrically insulating substrate, a first electrolyte enabling an ion flow between the electrode layers, an electrode region with the stacked arrangement of the electrode layers and a supercapacitor region, a second separator layer, a second electrolyte enabling an ion flow between the supercapacitor layers.

An electrochemical energy storage cell includes a first electrically insulating substrate and a first electrical conductor layer extending on an area of the first electrically insulating substrate, a second electrically insulating substrate and a second electrical conductor layer extending on an area of the second electrically insulating substrate, a first electrode layer composed of positive electrode material, a second electrode layer composed of negative electrode material, a first separator layer, a stacked arrangement of the layers: the first electrically insulating substrate—the first electrical conductor layer—the first electrode layer—the first separator layer—the second electrode layer—the second electrical conductor layer—the second electrically insulating substrate, a first electrolyte enabling an ion flow between the electrode layers, an electrode region with the stacked arrangement of the electrode layers and a supercapacitor region, a second separator layer, a second electrolyte enabling an ion flow between the supercapacitor layers.

A battery pack includes a plurality of battery apparatuses. Each battery apparatus includes lead-out terminal busbars, and the lead-out terminal busbars are disposed at end portions of each battery apparatus in a battery arrangement direction. At least one of the lead-out terminal busbars has at least two connecting branches, and the at least two connecting branches are configured to be respectively connected to a battery disconnect unit and/or other battery apparatuses in the battery pack.

The present invention provides a battery rack including: a housing; a plurality of battery modules stacked in the housing; and a connection member configured to electrically connect the plurality of battery modules, wherein each of the plurality of battery modules includes a plurality of battery submodules stacked on each other, and each of the plurality of battery submodules comprises: at least one cooling member; and a plurality of battery cells located on both sides with the at least one cooling member interposed therebetween, wherein at least two of the plurality of battery cells are located on each of both sides of the at least one cooling member.

The present invention provides a battery rack including: a housing; a plurality of battery modules stacked in the housing; and a connection member configured to electrically connect the plurality of battery modules, wherein each of the plurality of battery modules includes a plurality of battery submodules stacked on each other, and each of the plurality of battery submodules comprises: at least one cooling member; and a plurality of battery cells located on both sides with the at least one cooling member interposed therebetween, wherein at least two of the plurality of battery cells are located on each of both sides of the at least one cooling member.

The disclosure provides an electric energy storage device which includes four energy units with a substantially same voltage value. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.

The disclosure provides an electric energy storage device which includes four energy units with a substantially same voltage value. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.

A cell contacting system for an electrochemical device is provided, which includes a plurality of cell groups having one or more electrochemical cells, each having a first and a second cell terminal. The first cell terminals follow each other along the longitudinal direction in a first cell terminal region of the electrochemical device and the second cell terminals follow each other along the longitudinal direction in a second cell terminal region of the electrochemical device. The cell contacting system includes at least one cell connector extending obliquely to the longitudinal direction and configured for electrically conductively connecting cell terminals of a first cell group in the first cell terminal region to cell terminals of a second cell group in the second cell terminal region, which cell contacting system reliably enables a relative movement between the cell terminals to be electrically connected to each other.