The invention provides a closed type battery comprising a battery element covered with a covering film and a heat fusion seal portion formed by heat fusion on a periphery of the covering film, wherein the cleaving strength upon an internal pressure rise of a seal portion positioned between a positive electrode terminal and a negative electrode terminal is larger than that of any other seal portion, and a safety valve adapted to release pressure upon a battery\'s internal pressure rise is located at a portion other than said inter-terminal seal portion. The invention also provides an assembled battery wherein a plurality of closed type batteries are stacked one upon another while a safety valve adapted to release pressure upon an increase in the internal pressure of the battery is located at a position in no contact with the covering film surface of an adjoining battery.

Claims

7 · 1 independent · depth 2

7 granted claims

›1.independentAn assembled battery, comprisingna plurality of unit batteries connected in series or parallel and stacked one upon another, wherein each of the unit …+6

›2.↳ 1The assembled battery according to claim 1, wherein a heat fusion seal portion extending from an outer periphery of the battery around said inter-term…d2

›3.↳ 1The assembled battery according to claim 1, wherein the assembled battery comprises a lithium ion battery wherein a composite lithium manganese oxide …d2

›4.↳ 1The assembled battery according to claim 1, wherein a retaining member is flush with an outer surface of the inter-terminal seal portion.d2

›5.↳ 1The assembled battery according to claim 1, wherein the heat-resistant retaining member is flush with the outer surface of the inter-terminal seal por…d2

›6.↳ 1The assembled battery according to claim 1, wherein an integral type retaining member made up by retaining member located at an internal terminal port…d2

›7.↳ 1The assembled battery according to claim 1, wherein a heat-resistant retaining member is flush with the outer surface of the inter-terminal seal porti…d2

Classifications

14 codes

IPC · International Patent Classification

Section H — Electricity

H01M4/58
H01M2/12
H01M2/02
H01M4/13
H01M2/08

USPC · US Patent Classification

429/53429/224429/181429/223429/231.1429/231.6429/185429/231.3429/82

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

6.8 y

2,470 days filing → grant

Office actions

after a restriction

Responses

2 RCE

Examiner

Karie O'Neill Apicella

art unit 1726 · TC 1700

Law firm

Law firm · Log in to unlock

Citations: 13 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20070190402 A1	16 Aug 2007

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.