Secondary battery
A secondary battery includes an electrode assembly having a first electrode plate, a second electrode plate and a separator interposed therebetween. A pouch case includes an accommodating portion for accommodating the electrode assembly and a cover portion for sealing the accommodating portion. A reinforcing member is formed between the pouch case and the electrode assembly. In the secondary battery, the reinforcing member includes a first frame formed along one surface of the pouch case, which comes in contact with the electrode assembly, a support portion formed in form of a plate while being spaced apart from the first frame, and a second frame to connect the first frame and the support portion to each other.
1. A secondary battery comprising:
an electrode assembly having a first electrode plate, a second electrode plate and a separator interposed therebetween;
a pouch case having an accommodating portion to accommodate the electrode assembly and a cover portion to seal the accommodating portion; and
a reinforcing member formed between the pouch case and the electrode assembly,
wherein the reinforcing member comprises a first frame formed along at least one surface of the pouch case;
a support portion formed in a shape of a plate while being spaced apart from the first frame, and a second frame configured to connect the first frame with the support portion, and
wherein at least a portion of the reinforcing member is in contact with the electrode assembly.
2. The secondary battery according to claim 1 , wherein the reinforcing member is formed on at least one of a bottom inner surface of the accommodating portion and an inner surface of the cover portion.
3. The secondary battery according to claim 1 , wherein the first frame, the second frame and the support portion are formed into a single metal plate.
4. The secondary battery according to claim 3 , wherein the support portion of the single metal plate is formed flat.
5. The secondary battery according to claim 3 , wherein the support portion of the single metal plate is formed concavely toward the electrode assembly.
6. The secondary battery according to claim 1 , wherein the first frame, the second frame and the support portion are formed into a single plate spring.
7. The secondary battery according to claim 6 , wherein the support portion of the single plate spring is formed flat.
8. The secondary battery according to claim 6 , wherein the support portion of the single plate spring is formed concavely toward the electrode assembly.
9. The secondary battery according to claim 1 , wherein the support portion is formed into a metal plate.
10. The secondary battery according to claim 1 , wherein the support portion is formed into a plate spring.
11. The secondary battery according to claim 1 , wherein the support portion is formed flat.
12. The secondary battery according to claim 1 , wherein the support portion is formed concavely toward the electrode assembly.
13. The secondary battery according to claim 1 , wherein the first and second frames are formed into an elastic body.
14. The secondary battery according to claim 1 , wherein a surface size of the support portion is at or between 30 to 100% of a size surface of the electrode assembly.
15. The secondary battery according to claim 1 , wherein the reinforcing member is forcibly inserted into the pouch case.
16. The secondary battery according to claim 1 , wherein the reinforcing member is fixed to the pouch case using tape.
17. The secondary battery according to claim 1 , wherein the reinforcing member is fixed to the pouch case using heat compression.
18. The secondary battery according to claim 1 , wherein corners of the first frame have a rounded form.
19. The secondary battery according to claim 1 , wherein the support portion, the first frame and the second frame are formed of a material having a greater strength than a material of the pouch case.
20. The secondary battery according to claim 1 , wherein the electrode assembly is formed by winding the first electrode plate, the second electrode plate and the separator interposed therebetween.
21. The secondary battery according to claim 1 , wherein the electrode assembly is formed by stacking the first electrode plate, the second electrode plate and the separator interposed therebetween.
22. A secondary battery comprising:
an electrode assembly having a first electrode plate, a second electrode plate and a separator interposed therebetween;
a pouch case having an accommodating portion to accommodate the electrode assembly and a cover portion to seal the accommodating portion; and
a reinforcing member formed on at least one of the accommodating portion and the cover portion,
wherein the reinforcing member comprises a first frame formed along at least one of an inner surface of the accommodation portion and an inner surface of the cover portion;
a support portion configured to contact the electrode assembly and spaced apart from the first frame by a predetermined distance, and a second frame configured to connect the first frame and the support portion, and
wherein at least a portion of the reinforcing member is in contact with the electrode assembly.
23. The secondary battery according to claim 22 , wherein corners of the first frame are rounded.