US 11,817,577 B2
Nonaqueous electrolyte secondary battery and secondary battery module
Yasunori Baba, Hyogo (JP); Harunari Shimamura, Hyogo (JP); Keisuke Ohara, Hyogo (JP); Kohei Masai, Hyogo (JP); Kouhei Tsuzuki, Hyogo (JP); Katsunori Yanagida, Hyogo (JP); and Yo Kato, Nagoya (JP)
Assigned to PANASONIC HOLDINGS CORPORATION, Kadoma (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by Panasonic Corporation, Kadoma (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Mar. 12, 2021, as Appl. No. 17/200,058.
Claims priority of application No. 2020-046791 (JP), filed on Mar. 17, 2020.
Prior Publication US 2021/0296639 A1, Sep. 23, 2021
Int. Cl. H01M 4/36 (2006.01); H01M 4/58 (2010.01); H01M 50/471 (2021.01); H01M 50/46 (2021.01); H01M 4/583 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [H01M 4/583 (2013.01); H01M 50/46 (2021.01); H01M 50/471 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A secondary battery module, comprising:
at least one nonaqueous electrolyte secondary battery, and
an elastic body disposed together with the nonaqueous electrolyte secondary battery, for receiving a load from the nonaqueous electrolyte secondary battery in a direction in which the nonaqueous electrolyte secondary battery and the elastic body are disposed,
wherein
the nonaqueous electrolyte secondary battery includes an electrode body including a laminate of a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, and an enclosure for storing the electrode body therein,
the elastic body has a compressive elastic modulus of 5 MPa to 120 MPa,
the positive electrode includes a positive electrode collector containing Ti as a main component and having a thickness of 1 μm to 8 μm,
the negative electrode includes a negative electrode collector and a negative electrode active material layer including a first layer and a second layer sequentially formed from a side with the negative electrode collector, and
the first layer contains negative electrode active material particles containing first carbon-based active material particles with a 10% proof stress of 3 MPa or less, and
the second layer contains negative electrode active material particles containing second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.