IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0700988
(1999-05-20)
|
우선권정보 |
JP-11/065072 (1998-03-11); JP-10/138347 (1998-05-20); JP-10/165373 (1998-06-12); JP-10/369928 (1998-12-25); JP-10/369936 (1998-12-25); JP-10/369969 (1998-12-25); JP-10/369986 (1998-12-25); JP-10/373667 (1998-12-28) |
국제출원번호 |
PCT//JP99/02658
(2001-02-05)
|
§371/§102 date |
20010205
(20010205)
|
국제공개번호 |
WO99//60652
(1999-11-25)
|
발명자
/ 주소 |
- Yata, Shizukuni
- Kikuta, Haruo
- Kinoshita, Hajime
- Tajiri, Hiroyuki
- Kato, Shiro
|
출원인 / 주소 |
- Osaka Gas Company Limited
|
대리인 / 주소 |
Knobbe, Martens Olson &
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
8 |
초록
▼
The invention provides a non-aqueous secondary battery having positive and negative electrodes and non-aqueous electrolyte containing lithium salt which has an energy capacity of 30 Wh or more, a volume energy density of 180 Wh/l or higher, which battery has a flat shape and is superior in heat radi
The invention provides a non-aqueous secondary battery having positive and negative electrodes and non-aqueous electrolyte containing lithium salt which has an energy capacity of 30 Wh or more, a volume energy density of 180 Wh/l or higher, which battery has a flat shape and is superior in heat radiation characteristic, used safely and particularly preferably used for a energy storage system. The invention also provides a control method of the secondary battery.
대표청구항
▼
1. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, and a lithium salt-containing electrolyte, the battery being at least 30 Wh in energy capacity and at least 180 Wh/l in volume energy density and having a flat shape with a thickness of less than 12 mm, wherein
1. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, and a lithium salt-containing electrolyte, the battery being at least 30 Wh in energy capacity and at least 180 Wh/l in volume energy density and having a flat shape with a thickness of less than 12 mm, wherein the negative electrode is formed by graphite having an average particle diameter of 1 to 50 μm as active material, a resin as binder, and a metal as current collector, and the negative electrode has a porosity of 20 to 35%, an electrode density of 1.40 to 1.70 g/cm3, and an capacity of electrode of 400 mAh/cm3 or higher.2. The non-aqueous secondary battery according to claim 1, wherein the negative electrode contains a graphite material obtained by graphitizing mesocarbon microbeads.3. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, and a lithium salt-containing electrolyte, the battery being at least 30 Wh in energy capacity and at least 180 Wh/l in volume energy density and having a flat-shape with a thickness of less than 12 mm, wherein the negative electrode comprises as active material double-structure graphite particles formed with graphite-based particles and amorphous carbon layers covering the surface of the graphite-based particles, the graphite-based particles have (d002) spacing of (002) planes of not more than 0.34 nm as measured by X-ray wide-angle diffraction method, the amorphous carbon layers have (d002) spacing of (002) planes of 0.34 nm or higher, the negative electrode is formed by double-structure graphite particles having an average particle diameter of 1 to 50 μm as active material, a resin as binder, and a metal as current collector, and the negative electrode has a porosity of 20 to 35%, an electrode density of 1.20 to 1.60 g/cm3, and an capacity of electrode of 400 mAh/cm3 or higher.4. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, and a lithium salt-containing electrolyte, the battery being at least 30 Wh in energy capacity and at least 180 Wh/l in volume energy density and having a flat shape with a thickness of less than 12 mm, wherein the negative electrode comprises as active material a carbon material manufactured by mixing at least one of artificial graphite and natural graphite with a carbon material having volatile components on the surface and/or in the inside and baking the mixture, the negative electrode is formed by a resin as binder and a metal as current collector, and the negative electrode has a porosity of 20 to 35%, an electrode density of 1.20 to 1.60 g/cm3, and an capacity of electrode of 400 mAh/cm3 or higher.
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