Provided is a battery pack including flexible bus bars formed in a form in which a plurality of thin plates are stacked, having bent parts formed at the center thereof, and having both sides coupled to a positive electrode terminal and a negative electrode terminal protruding outwardly of battery modules to electrically connect electrode terminals of the battery modules to each other.
1. A battery pack comprising:
a plurality of battery modules stacked and arranged in parallel with each other and having electrode terminals formed at one side thereof;
each of flexible bus bars formed by stacking a plurality of thin plates, having bent parts formed at the center of the plurality of thin plates, and having both sides connected to electrode terminals of neighboring battery modules; and
fastening means coupled to the electrode terminals of the battery modules to electrically connect the flexible bus bars to the electrode terminals while fixing the flexible bus bars to the electrode terminals.
2. The battery pack of claim 1 , wherein the fastening means includes:
socket terminals having a plurality of elastic contactors extendedly formed at one sides of cylindrical bodies thereof so as to be spaced apart from each other by a predetermined interval in a circumferential direction and inserted onto and closely adhered to outer sides of the electrode terminals protruding from one sides of the battery modules; and
sockets enclosing outer sides of the socket terminals and coupled to the socket terminals so as to be closely adhered thereto and having the flexible bus bars coupled to one sides thereof,
the electrode terminals and the flexible bus bars being electrically connected to each other by the socket terminals and the sockets.
3. The battery pack of claim 2 , wherein the socket has a vertical plate formed at one side of a cylindrical body thereof enclosing the outer side of the socket terminal and closely adhered to the outer side of the socket terminal, and the flexible bus bar has both sides closely adhered and coupled to the vertical plate.
4. The battery pack of claim 2 , further comprising a case coupled to the battery modules to accommodate the sockets, the socket terminals, and the flexible bus bars coupled to the electrode terminals therein and closely adhering the sockets and the socket terminals to the electrode terminals in a direction in which the sockets and the socket terminals are inserted onto the electrode terminals.
5. The battery pack of claim 4 , wherein sliding guides and hooking jaws are formed at both sides of partition walls formed in the battery modules, and sliding grooves corresponding to the sliding guides and elastic hooks hooked and fixed to the hooking jaws are formed in the case.
6. The battery pack of claim 4 , wherein the case has fixing protrusions protruding at both sides of an inner portion thereof, and the flexible bus bar has cut parts formed therein so as to correspond to the fixing protrusions, such that the flexible bus bar is closely adhered and fixed by the fixing protrusions.
7. The battery pack of claim 3 , further comprising a case coupled to the battery modules to accommodate the sockets, the socket terminals, and the flexible bus bars coupled to the electrode terminals therein and closely adhering the sockets and the socket terminals to the electrode terminals in a direction in which the sockets and the socket terminals are inserted onto the electrode terminals.
8. The battery pack of claim 7 , wherein sliding guides and hooking jaws are formed at both sides of partition walls formed in the battery modules, and sliding grooves corresponding to the sliding guides and elastic hooks hooked and fixed to the hooking jaws are formed in the case.
9. The battery pack of claim 7 , wherein the case has fixing protrusions protruding at both sides of an inner portion thereof, and the flexible bus bar has cut parts formed therein so as to correspond to the fixing protrusions, such that the flexible bus bar is closely adhered and fixed by the fixing protrusions.