Connector between battery modules and battery system comprising the same

A battery system, comprising:

• a plurality of battery modules each having a plurality of cells, each of the cells having a terminal, the plurality of cells of each battery module being connected to each other in series and/or in parallel by the terminals thereof, each of the battery modules having an output end;
• and
• a plurality of connectors, each of which being electrically connected to the output ends of adjacent battery modules respectively,
• wherein each connector further includes:
• first and second connecting pieces, the first connecting piece being electrically connected to an output end of a first battery module, the second connecting piece being electrically connected to an output end of a second battery module adjacent to the first battery module, and the first connecting piece and the second connecting piece being electrically connected to each other so as to form an electrically-connected part therebetween;
• a clamping unit configured to clamp the electrically-connected part formed by the first connecting piece and the second connecting piece;
• and
• a support, the clamping unit being fixed onto the support so as to support the electrically-connected part between the first connecting piece and the second connecting piece;
• wherein each of the first and second connecting pieces comprises:
• a buffer section having a substantially inverted U shape;
• an output end connecting section connected to one end of the buffer section and electrically connected to the output end of a respective battery module;
• and
• a clamped section connected to the other end of the buffer section,
• wherein the clamped sections of the first and second connecting pieces are electrically connected to each other.