A battery module includes a plurality of rechargeable batteries respectively including externally protruded terminals, a bus-bar electrically coupling at least two of the terminals of the rechargeable batteries, and a protection member disposed between the bus-bar and the rechargeable batteries, and including a protruding portion formed along a circumference of the bus-bar.
1. A battery module, comprising:
a plurality of rechargeable batteries respectively including externally protruding terminals;
a bus-bar electrically coupling at least two of the terminals of the rechargeable batteries; and
a protection member between the bus-bar and the rechargeable batteries, and including a support plate disposed on a case of the rechargeable batteries, the support plate including holes through which the terminals extend, and a protruding portion disposed along a circumference of the bus-bar, wherein the protruding portion includes:
a protection protrusion surrounding the bus-bar and including a gap, and
a guiding protrusion extending from ends of the protection protrusion corresponding to the gap toward a center of the support plate in a width direction.
2. The battery module as claimed in claim 1 , further comprising a housing in which the rechargeable batteries are installed,
wherein the protection member is disposed on the housing.
3. The battery module as claimed in claim 1 , wherein the protruding portion is formed in the shape of a rib surrounding the bus-bar.
4. A battery module, comprising:
a plurality of rechargeable batteries respectively including externally protruding terminals;
a bus-bar electrically coupling at least two of the terminals of the rechargeable batteries; and
a protection member between the bus-bar and the rechargeable batteries, and including a protruding portion disposed along a circumference of the bus-bar, wherein the protection member includes an exhaust hole corresponding to an upper portion of an exhaust member formed in the rechargeable battery.
5. The battery module as claimed in claim 4 , wherein an exhaust protrusion protrudes upward along a circumference of the exhaust hole.
6. The battery module as claimed in claim 4 , further comprising a housing in which the rechargeable batteries are installed,
wherein the protection member is disposed on the housing.
7. The battery module as claimed in claim 4 , wherein the protection member further includes a support plate disposed on a case of the rechargeable batteries, the support plate including holes through which the terminals extend.
8. The battery module as claimed in claim 4 , wherein the protruding portion is formed in the shape of a rib surrounding the bus-bar.
9. A battery module, comprising:
a plurality of rechargeable batteries respectively including externally protruding terminals;
a bus-bar electrically coupling at least two of the terminals of the rechargeable batteries; and
a protection member between the bus-bar and the rechargeable batteries, and including a protruding portion disposed along a circumference of the bus-bar, wherein:
the protection member further includes a support plate disposed on a case of the rechargeable batteries,
the support plate includes holes through which the terminals extend, and
the support plate includes a pressing protrusion contacting a bottom surface of the bus-bar.
10. The battery module as claimed in claim 9 , wherein an end portion of the pressing protrusion protrudes farther in a direction of an end portion of one of the terminals than a bottom side of a portion of the bus-bar that contacts the terminal.
11. The battery module as claimed in claim 9 , wherein the bus-bar is bent by the pressing protrusion.
12. The battery module as claimed in claim 9 , wherein a shear stress is applied to the bus-bar by the pressing protrusion.
13. The battery module as claimed in claim 9 , wherein two pressing protrusions are separately disposed from each other under one bus-bar.
14. The battery module as claimed in claim 9 , wherein:
the bus-bar electrically couples four or more rechargeable batteries, and
a height of a pressing protrusion pressing an end side of the bus-bar in a length direction is higher than a height of a pressing protrusion pressing a center portion of the bus-bar in the length direction.
15. The battery module as claimed in claim 9 , wherein the bus-bar is deformed by a plurality of pressing protrusions, and
when a strain at a center portion of the bus-bar is represented by “em”, a strain at an edge that is disposed further to a side than the center portion in a length direction of the bus-bar is represented by “es”, and a strain in elastic limit is represented by “el,” em, es and el satisfy the relation:
em<es<el.
16. The battery module as claimed in claim 9 , wherein the bus-bar is deformed by a plurality of pressing protrusions including first pressing protrusions and at least one second pressing protrusion, the first protrusions being at respective end regions of the bus-bar in a length direction of the bus-bar and the second protrusion being at a center region between the first protrusions, and
when an angle formed by the bus-bar and a plane that is parallel with an upper side of the support plate at a portion where the bus-bar and one of the first pressing protrusion contact each other is an angle represented by “a1” and an angle formed by the bus-bar and the support plate at a portion where the bus-bar and one of the second pressing protrusion is an angle represented by “a2,” a1 and a2 satisfy the relation:
a2<a1.
17. The battery module as claimed in claim 9 , wherein the bus-bar includes holes through which the terminals are inserted, a bottom side of the bus-bar contacts a base member fixed one of the terminals, and an upper side of the bus-bar contacts a nut fastened to the one of the terminals.
18. The battery module as claimed in claim 17 , wherein the pressing protrusion protrudes farther to a direction toward an end portion of the one of the terminals than an upper side of the base member.
19. The battery module as claimed in claim 9 , further comprising a housing in which the rechargeable batteries are installed,
wherein the protection member is disposed on the housing.
20. The battery module as claimed in claim 9 , wherein the protection member further includes a support plate disposed on a case of the rechargeable batteries, the support plate including holes through which the terminals extend.
21. The battery module as claimed in claim 9 , wherein the protruding portion is formed in the shape of a rib surrounding the bus-bar.