A contact structure causing a first electric device to be electrically connected to a second electric device includes first terminals and second terminals. The second terminals include contact projections to be electrically connected to the first terminals, and cleaning projections located closer to an opening side of a fitting part of the second electric device than the contact projections to be brought into contact with the first terminals. The contact structure is configured such that the contact projections are not in contact with a surface of an outer case of the first electric device or surfaces of the first terminals before the cleaning projections climb over the first terminals. The contact structure is also configured such that the contact projections are brought into contact with the surfaces of the first terminals after the cleaning projections climb over the first terminals.

A contact structure causing a first electric device to be electrically connected to a second electric device includes first terminals and second terminals. The second terminals include contact projections to be electrically connected to the first terminals, and cleaning projections located closer to an opening side of a fitting part of the second electric device than the contact projections to be brought into contact with the first terminals. The contact structure is configured such that the contact projections are not in contact with a surface of an outer case of the first electric device or surfaces of the first terminals before the cleaning projections climb over the first terminals. The contact structure is also configured such that the contact projections are brought into contact with the surfaces of the first terminals after the cleaning projections climb over the first terminals.

A system is described for providing an electrical ground connection for a circuit assembly. The system may include a housing for the circuit assembly, the housing having an electrically conductive fixation member configured for attachment to an electrically conductive element outside the housing. The system may also include an electrically conductive feature having a first end and a second end, the first end configured to cooperate with the electrically conductive fixation member inside the housing and the second end configured for attachment to the circuit assembly. Attachment of the electrically conductive fixation member to the electrically conductive element outside the housing enables an electrical ground connection for the circuit assembly via the electrically conductive feature.

Provided is a battery pack including: an exterior case; a cylindrical battery cell including a positive electrode terminal part at one end and a negative electrode terminal part at the other end; and a metal plate connected to the positive electrode terminal part or the negative electrode terminal part, where the battery cell has a peripheral protrusion around the positive electrode terminal part or the negative electrode terminal part, the metal plate has a protrusion that faces the peripheral protrusion, and the protrusion is disposed in close contact with the whole periphery of the peripheral protrusion, with a first insulating part interposed therebetween.

Provided is a battery pack including: an exterior case; a cylindrical battery cell including a positive electrode terminal part at one end and a negative electrode terminal part at the other end; and a metal plate connected to the positive electrode terminal part or the negative electrode terminal part, where the battery cell has a peripheral protrusion around the positive electrode terminal part or the negative electrode terminal part, the metal plate has a protrusion that faces the peripheral protrusion, and the protrusion is disposed in close contact with the whole periphery of the peripheral protrusion, with a first insulating part interposed therebetween.

The invention relates to an electric battery (1) for a motor vehicle which is electrically or partly electrically driven or a movable or stationary unit, having a battery housing (5) and a plurality of battery cells (2) arranged therein. The aim of the invention is to allow such an electric battery (1) to be produced with minimal costs and technical structural complexity while still having a high degree of operational reliability. This is achieved in that the battery housing (5) is made of an expanded or foamed plastic.

The invention relates to an electric battery (1) for a motor vehicle which is electrically or partly electrically driven or a movable or stationary unit, having a battery housing (5) and a plurality of battery cells (2) arranged therein. The aim of the invention is to allow such an electric battery (1) to be produced with minimal costs and technical structural complexity while still having a high degree of operational reliability. This is achieved in that the battery housing (5) is made of an expanded or foamed plastic.

A cell module has a plurality of electrochemical pouch cells. Each pouch cell has at least a first and second electrode, a separator arranged between the electrodes, and a flexible outer sleeve. Each pouch cell has a circular outer rim and a circular through-hole arranged in the center of the pouch cell. An outer cell terminal is arranged on the outer rim of each pouch cell, and an inner cell terminal is arranged on an inner rim of the through-hole. The cell module has an inner current collector in the form of a cylindrical rod and an outer current collector in the form of a cylinder jacket. The inner current collector extends along a mid-axis of the cell module, and the outer current collector is arranged concentrically with respect to the inner current collector.

A cell module has a plurality of electrochemical pouch cells. Each pouch cell has at least a first and second electrode, a separator arranged between the electrodes, and a flexible outer sleeve. Each pouch cell has a circular outer rim and a circular through-hole arranged in the center of the pouch cell. An outer cell terminal is arranged on the outer rim of each pouch cell, and an inner cell terminal is arranged on an inner rim of the through-hole. The cell module has an inner current collector in the form of a cylindrical rod and an outer current collector in the form of a cylinder jacket. The inner current collector extends along a mid-axis of the cell module, and the outer current collector is arranged concentrically with respect to the inner current collector.

A power storage device comprises: a plurality of power storage cells that are aligned in an alignment direction; an accommodation case that includes an upper case and a lower case and accommodates the plurality of power storage cells; a bus bar module that electrically connects the plurality of power storage cells together; and a cover that is disposed between the upper case and the bus bar module such that a portion of the upper case can abut thereon, the plurality of power storage cells being fixed to the lower case, the bus bar module including a plurality of bus bars that connect the external terminals of the power storage cells adjacent to one another in the alignment direction, the cover including a facing portion that faces the plurality of bus bars, the facing portion being provided with a projection that abuts on the bus bar.