Disclosed herein is a battery module including two or more plate-shaped battery cells, as unit cells, constructed in a stacked structure in which electrode terminals of the battery cells are connected in series with each other and the electrode terminal connections are bent such that the battery cel
Disclosed herein is a battery module including two or more plate-shaped battery cells, as unit cells, constructed in a stacked structure in which electrode terminals of the battery cells are connected in series with each other and the electrode terminal connections are bent such that the battery cells are stacked, and a pair of high-strength cell covers for surrounding the outer surfaces of the battery cells when the cell covers are coupled with each other. The present invention has the effect of easily mounting a sensing unit that is capable of minimizing the weight and size of battery cells while effectively reinforcing the low mechanical strength of the battery cells and sensing the operation state of the battery cells to a battery module. In addition, the present invention has the effect of manufacturing the battery module by a simple assembly process without using a plurality of members for mechanical coupling and electrical connection, thereby decreasing the manufacturing costs of the battery module, and effectively preventing the battery module from being short-circuited or damaged during the manufacture or the operation of the battery module. Furthermore, the present invention has the effect of manufacturing a middle- or large-sized battery system having desired output and capacity using the battery module as a unit body.
대표청구항▼
1. A battery module including plate-shaped battery cells having electrode terminals formed at the upper and lower ends thereof, wherein the battery module comprises: two or more battery cells constructed in a stacked structure in which the battery cells are connected in series with each other such t
1. A battery module including plate-shaped battery cells having electrode terminals formed at the upper and lower ends thereof, wherein the battery module comprises: two or more battery cells constructed in a stacked structure in which the battery cells are connected in series with each other such that electrode terminal connections between electrode terminals of successively adjacent battery cells are bent such that the battery cells are stacked, wherein each battery cell is constructed in a structure in which an electrode assembly is mounted in a case made of a laminate sheet including a metal layer and a resin layer, and an edge of the case is sealed; anda pair of cell covers for surrounding the outer surfaces of the battery cells excluding the electrode terminals of the battery cells when the cell covers are coupled with each other, wherein each cell cover includes elastic coupling parts that directly engage with the elastic coupling parts of the other cell cover to couple the cell covers with each other,wherein the cell covers are each entirely made of a metal sheet. 2. The battery module according to claim 1, wherein the cell covers each have an inside structure corresponding to an outer shape of the stacked structure, and the cell covers are coupled with each other in an assembly coupling fashion. 3. The battery module according to claim 2, wherein the elastic coupling parts are constructed in a symmetrically bent structure formed approximately symmetrically in vertical section thereof such that the cell covers are coupled with each other by elastic coupling when the cell covers are pressed while the cell covers are in contact with each other such that the cell covers face each other. 4. The battery module according to claim 1, wherein the electrode terminals are coupled with each other by welding. 5. The battery module according to claim 1, wherein the case is a pouch-shaped case made of an aluminum laminate sheet. 6. The battery module according to claim 1, wherein side sealing parts among edge sealing parts of the battery cell are bent such that the side sealing parts approximately coincide with an inner shape of the case. 7. The battery module according to claim 1, wherein each cell cover is provided at an outer surface thereof with a plurality of linear protrusions which are spaced apart from each other in a lateral direction. 8. The battery module according to claim 7, wherein at least one of the linear protrusions has a depression in which a thermistor is mounted. 9. The battery module according to claim 7, wherein upper-end and lower-end protrusions among the linear protrusions have projection parts formed in opposite shapes. 10. The battery module according to claim 9, wherein the protrusions having the projection parts are arranged in a noncontinuous structure about the projection parts. 11. The battery module according to claim 7, wherein most of the protrusions are constructed such that a length between opposite ends of the protrusions is less than a width of the cell covers. 12. The battery module according to claim 1, wherein the cell covers are provided at outer surfaces thereof adjacent to upper and lower ends thereof with steps of a predetermined size for easily fixing the battery module. 13. The battery module according to claim 1, wherein the cell covers are provided at outer surfaces thereof adjacent to opposite sides thereof with steps of a predetermined size for easily fixing the battery module. 14. A middle- or large-sized battery pack comprising the battery module according to claim 1. 15. The battery pack according to claim 14, wherein the battery pack is manufactured by mounting a stack of two or more battery modules to a pack frame such that the stack is erected in a lateral direction. 16. An electric vehicle comprising the battery pack according to claim 14 as a power source. 17. A hybrid electric vehicle comprising the battery pack according to claim 14 as a power source. 18. The battery module according to claim 1, wherein the electrode assembly of each plate-shaped battery cell includes cathodes and anodes stacked in a first direction, and the battery cells are stacked along the first direction. 19. The battery module according to claim 1, wherein each successively adjacent electrode terminal connection along the successively adjacent battery cells connected in series is disposed at an alternating one of a first end and a second end of the stacked structure. 20. The battery module according to claim 1, wherein the cell covers are coupled with each other by elastic coupling when the cell covers are pressed together. 21. A battery module including plate-shaped battery cells having electrode terminals formed at the upper and lower ends thereof, wherein the battery module comprises: two or more battery cells constructed in a stacked structure in which the battery cells are connected in series with each other such that electrode terminal connections between electrode terminals of successively adjacent battery cells are bent such that the battery cells are stacked, wherein each battery cell is constructed in a structure in which an electrode assembly is mounted in a case made of a laminate sheet including a metal layer and a resin layer, and an edge of the case is sealed; anda pair of cell covers for surrounding the outer surfaces of the battery cells excluding the electrode terminals of the battery cells when the cell covers are coupled with each other, wherein each cell cover includes elastic coupling parts that directly engage with the elastic coupling parts of the other cell cover to couple the cell covers with each other,wherein the cell covers are coupled with each other without using an additional coupling member, andwherein the cell covers are each entirely made of a metal sheet. 22. The battery module according to claim 21, wherein the pair of cell covers includes separate and distinct cell covers.
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