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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2016/132897
Kind Code:
The present invention suppresses deterioration of secondary cells in a battery pack having a plurality of secondary cells fastened and each obtained by accommodating electrodes in a flat rectangular metal case. This battery pack 1 includes: flat rectangular secondary cells 100 each having a case 110 and electrodes accommodated in the case 110; and spacers 200 provided on both sides in the thickness direction (X-axis direction) of the secondary cells 100. The case 110 has wide side surfaces 110a on both sides in the thickness direction, the wide side surfaces 110a each having: an intermediate region R1 that overlaps with an electrode mixture layer; and peripheral regions R2 around the intermediate region R1. The spacers 200 provided on both sides in the thickness direction of the secondary cells 100 each have: abutting portions 210 that abut against the peripheral regions R2 of the wide side surface 110a; and a cavity portion 220 that is contiguous to the intermediate region R1 of the wide side surface 110a. The dimension in the thickness direction of the cavity portion 220 is greater than or equal to the expansion amount in the thickness direction of the wide side surface 110a at the time when the secondary cell 100 is fully charged.

ABE Toshio (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
Publication Date:
August 25, 2016
Filing Date:
February 03, 2016
Export Citation:
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HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
H01M2/10; H01M2/02; H01M10/04; H01M10/613; H01M10/625; H01M10/647; H01M10/6557; H01M10/6563
Domestic Patent References:
Foreign References:
Attorney, Agent or Firm:
INOUE Manabu et al. (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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