Lithium ion rechargeable battery
First Claim
1. A lithium ion secondary battery comprising:
- a case having an open top end and a closed bottom end;
an electrode assembly disposed inside the case;
a cap assembly disposed on the top end of the case, the cap assembly sealing the open top end of the case; and
a lower insulating plate disposed between the electrode assembly and the bottom end of the case, a recess with a depth formed on a surface of the lower insulating plate, a surface of the lower insulating plate being coated with polyvinyldifluride (PVdf) material.
1 Assignment
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Accused Products
Abstract
A lithium ion secondary battery in which an electrode assembly is easily impregnated with an electrolyte is provided. The lithium ion secondary battery includes an electrode assembly wrapped by a sealing tape, an upper insulating plate positioned on the top of the electrode assembly, a lower insulating plate positioned at the bottom of the electrode assembly, a case for accommodating the electrode assembly, and a cap assembly for sealing the case. In one embodiment, the upper insulating plate has holes which may include a form of a mesh. In another embodiment, the lower insulating plate has various shapes of recesses on the surface. The surface of the lower insulating plate may be coated with a material that has an affinity for the electrolyte. An inner surface of the case may have various shapes of recesses or grooves. The sealing tape may be coated with a material that has an affinity for an electrolyte. Therefore, according to the principles of the present invention, the electrode assembly is easily impregnated with the electrolyte, and overall performance of the lithium ion secondary battery is improved.
10 Citations
25 Claims
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1. A lithium ion secondary battery comprising:
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a case having an open top end and a closed bottom end; an electrode assembly disposed inside the case; a cap assembly disposed on the top end of the case, the cap assembly sealing the open top end of the case; and a lower insulating plate disposed between the electrode assembly and the bottom end of the case, a recess with a depth formed on a surface of the lower insulating plate, a surface of the lower insulating plate being coated with polyvinyldifluride (PVdf) material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A lithium ion secondary battery comprising:
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a case having an open top end and a closed bottom end; an electrode assembly disposed inside the case; a cap assembly disposed on the top end of the case, the cap assembly sealing the open top end of the case; and a lower insulating plate disposed between the electrode assembly and the bottom end of the case, a recess with a depth formed on a surface of the lower insulating plate; and an upper insulating plate disposed between the electrode assembly and the cap assembly, the upper insulating plate having a plurality of holes, a surface of one of the lower insulating plate and the upper insulating plate being coated with polyvinyldifluride (PVdF) material. - View Dependent Claims (11, 12, 13, 14)
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15. A lithium ion secondary battery comprising:
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a case having an open top end and a closed bottom end; an electrode assembly disposed inside the case; a cap assembly disposed on the top end of the case, the cap assembly sealing the open top end of the case; and a sealing tape wrapping the outer circumference of the electrode assembly, an inner surface of the case having a pattern of grooves having a predetermined depth where the inner surface of the case partially contacts the sealing tape, the pattern of grooves completely covering the inner surface of the case, the predetermined depth of the grooves being no more than about 15% of a thickness of the case. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A lithium ion secondary battery comprising:
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a case having an open top end and a closed bottom end; an electrode assembly disposed inside the case; a cap assembly disposed on the top end of the case, the cap assembly sealing the open top end of the case; and a sealing tape wrapping the outer circumference of the electrode assembly, an inner surface of the case having a regular pattern where the inner surface of the case partially contacts the sealing tape, the regular pattern completely covering the inner surface of the case. - View Dependent Claims (24, 25)
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Specification