Patent US2241897A successfully refreshed from Google Patents.
EP0631339A2
Expired / Lapsed
EP
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Secondary battery
Assignee: Canon Inc
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Filing: 1994-03-29
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Granted: —
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Expires: 2014-03-29
Abstract
Abstract A purpose of the present invention is to provide a secondary battery of high safety and high energy density. The battery of the present invention is a lithium secondary battery at least formed of negative electrode active material, a separator, positive electrode active material, electrolytic solution (electrolyte), a collector and a battery case, characterized by the presence of phosphorus type - and/or halogen type flame retardant in said electrolyte solution.
Inventors
- 👤 Soichiro C/O Canon Kabushiki Kaisha Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 09:24
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M10/0564; H01M10/0565; H01M10/0566; H01M10/0567; H01M10/42; H01M10/4235; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164; H01M2200/00; H01M2200/10; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M2300/0028; H01M2300/0034; H01M50/00; H01M50/40; H01M50/409; H01M50/449; H01M50/451; H01M50/454; H01M50/457; H01M50/46; H01M6/168; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
66 words
A lithium secondary battery comprising a negative electrode having negative electrode active material, a positive electrode having positive electrode active material with a separator sandwiched between it and said negative electrode active material, and electrolyte solution between said negative electrode and said positive electrode, characterized by containing phosphorus type flame retardant containing phosphorus element and/or halogen type flame retardant containing halogen element in said electrolyte solution.
Claim 2
Dependent Claim
23 words
A lithium secondary battery according to claim 1, characterized in that said halogen type flame retardant is perfluorocarbon of fluorine compound inert liquid.
Claim 3
Dependent Claim
39 words
A lithium secondary battery according to claim 1, characterized in that the surface of said negative electrode having negative electrode active material opposed to the positive electrode is covered with a membrane capable of transmitting at least lithium ions.
Claim 4
Dependent Claim
40 words
A lithium secondary battery according to claim 1, characterized in that the surface of said positive electrode composed of positive electrode active material opposed to the negative electrode is covered with a membrane capable of transmitting at least lithium ions.
Claim 5
Dependent Claim
23 words
A lithium secondary battery according to claim 3 or 4, characterized in that said membrane is made of flame retardant or incombustible material.
Claim 6
Dependent Claim
19 words
A lithium secondary battery according to claim 1, wherein said negative electrode active material is lithium or lithium alloy.
Claim 7
Dependent Claim
29 words
A lithium secondary battery according to claim 1, characterized in that the mixture ratio by weight of said flame retardant in electrolyte solution is from 1 to 20 wt%.
Claim 8
Dependent Claim
21 words
A lithium secondary battery according to claim 2, characterized in that the boiling point of said perfluorocarbon is 50°C or above.
Claim 9
Dependent Claim
59 words
A microcapsule containing secondary battery comprising a negative electrode having negative electrode active material, a positive electrode having positive electrode active material with a separator sandwiched between it and said negative electrode active material, and electrolyte solution between said negative electrode and said positive electrode, characterized by comprising microcapsules containing the chemical substance in said separator and/or electrolyte solution.
Claim 10
Dependent Claim
22 words
A microcapsule containing secondary battery according to claim 9, characterized in that said microcapsule containing secondary battery is a lithium secondary battery.
Claim 11
Dependent Claim
21 words
A microcapsule containing secondary battery according to claim 9, wherein said chemical substance has at least a compound having hydroxyl group.
Claim 12
Dependent Claim
24 words
A microcapsule containing secondary battery according to claim 9, characterized in that said chemical substance has at least polymerization initiator or cross linking agent.
Claim 13
Dependent Claim
34 words
A microcapsule containing secondary battery according to claim 12, characterized in that said microcapsule contains, in addition to polymerization initiator or cross linking agent, one kind or more selected from monomer, oligomer, and polymer.
Claim 14
Dependent Claim
19 words
A microcapsule containing secondary battery according to claim 9, characterized in that said chemical substance has at least acid.
Claim 15
Dependent Claim
20 words
A microcapsule containing secondary battery according to claim 9, characterized in that said chemical substance has at least flame retardant.
Claim 16
Dependent Claim
42 words
A microcapsule containing secondary battery according to claim 9, characterized in that the surface of the negative electrode composed of said negative electrode active material opposed to the positive electrode is covered with a membrane capable of transmitting at least lithium ions.
Claim 17
Dependent Claim
42 words
A microcapsule containing secondary battery according to claim 9, characterized in that the surface of the positive electrode composed of said positive electrode active material opposed to the negative electrode is covered with a membrane capable of transmitting at least lithium ions.
Claim 18
Dependent Claim
25 words
A microcapsule containing secondary battery according to claim 16 or 17, characterized in that said membrane is made of fire retarding material or incombustible material.
Claim 19
Dependent Claim
20 words
A microcapsule containing secondary battery according to claim 9, wherein said negative electrode active material is lithium or lithium alloy.
Claim 20
Dependent Claim
23 words
A microcapsule containing secondary battery according to claim 9, characterized in that the melting point of said microcapsule is from 70 to 150°C.
Claim 21
Dependent Claim
22 words
A microcapsule containing secondary battery according to claim 9, characterized in that said microcapsule is from 1 to 500 micros in size.
Claim 22
Dependent Claim
28 words
A microcapsule containing secondary battery according to claim 9, characterized in that the mixture amount of said microcapsule is from 1 to 20 wt% of said electrolyte solution.
References Cited (Backward Citations)
No citation records indexed.
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