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US 7,842,414 B2Granted
Lithium secondary battery
AssigneeSamsung SDI Co., Ltd.
InventorsSeung-Joon Hong, Seok-Gyun Chang, Jung-Seog Kim, Sang-Bong Nam
Life of this patent
Estimating the term…
Abstract
A lithium secondary battery, and more particularly, a lithium secondary battery which can improve the impregnation of an electrolyte solution either by modifying the material of a protection layer, such as a laminating tape and others, to be formed to protect the elimination of active materials, into a material with an affinity for the electrolyte solution, or by coating the material of an existing protection layer with an ingredient with an affinity for the electrolyte solution.
Claims15
A lithium secondary battery, comprising:
- an electrode assembly, comprising:
- a cathode plate having a cathode active material portion in which a cathode collector is coated with a cathode active material and an uncoated cathode portion composed only of the cathode collector;
- an anode plate having an anode active material portion in which an anode collector is coated with an anode active material and an anode uncoated portion composed only of the anode collector;
- a protection layer formed on an adjoining portion between an active material portion and an uncoated portion of a terminal end of one selected from the group consisting of one of the cathode plate, the anode plate and both of the cathode plate and the anode plate;
- and
- a separator interposed between the cathode plate and the anode plate;
- a case open to receive the electrode assembly and an electrolyte solution;
- and
- a cap assembly oriented to seal an upper opening of the case, with the protection layer comprised of a material having an affinity for the electrolyte solution due to the wettability and dispersibility of the material for the protection layer against an electrolyte solution.
6 more elements
A lithium secondary battery, comprising:
- an electrode assembly, comprising:
- a cathode plate having a cathode active material portion in which a cathode collector is coated with a cathode active material and an uncoated cathode portion composed only of the cathode collector;
- an anode plate having an anode active material portion in which an anode collector is coated with an anode active material and an anode uncoated portion composed only of the anode collector;
- a protection layer that is formed on an adjoining portion between an active material portion and an uncoated portion of a terminal end of one of the cathode plate or the anode plate;
- and
- a separator that is interposed between the cathode and anode plates;
- a case for receiving the electrode assembly and an electrolyte solution;
- and
- a cap assembly for sealing an upper opening of the case,
- with the protection layer comprising a laminating tape to be attached to the adjoining portion between the active material portion and the uncoated portion of the terminal end of said one of the cathode plate or the anode plate, and a coating film that is a material having an affinity for the electrolyte solution due to the wettability and dispersibility of the material against an electrolyte solution and that is applied to the surface of the laminating tape.
7 more elements
Dependencies are inferred from the claim text.