US 11,710,834 B2
Lithium primary battery
Miyuki Nakai, Osaka (JP); Yasuyuki Kusumoto, Hyogo (JP); and Atsushi Fukui, Hyogo (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 16/981,118
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Oct. 10, 2018, PCT No. PCT/JP2018/037639
§ 371(c)(1), (2) Date Sep. 15, 2020,
PCT Pub. No. WO2019/181027, PCT Pub. Date Sep. 26, 2019.
Claims priority of application No. 2018-057054 (JP), filed on Mar. 23, 2018.
Prior Publication US 2021/0020957 A1, Jan. 21, 2021
Int. Cl. H01M 6/16 (2006.01); H01M 4/06 (2006.01); H01M 6/02 (2006.01)
CPC H01M 6/168 (2013.01) [H01M 4/06 (2013.01); H01M 6/02 (2013.01); H01M 6/164 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A lithium primary battery comprising: a battery case; an electrode group received in the battery case; and a nonaqueous electrolyte,
wherein the nonaqueous electrolyte contains a nonaqueous solvent, a solute, and an additive,
the electrode group includes a positive electrode, a negative electrode, and a separator interposed therebetween, the positive electrode, the negative electrode, and the separator being spirally wound together,
the negative electrode includes foil composed of metal lithium or a lithium alloy, has a shape extending in a longitudinal direction and a short direction, and is provided with a long tape adhered to at least one main surface of the negative electrode along the longitudinal direction thereof,
the tape includes a resin substrate and an adhesive layer and has a width of 0.5 to 3 mm, and the additive is a lithium salt represented by the following formula (1)
LixMCyOzF60
where in the formula (1), 1≤x≤2, 0≤y≤6, 0≤z≤8, 0≤α≤6, and 1≤y+z+α are satisfied, y and z are not simultaneously 0, and the element M includes at least one of phosphorus and boron,
wherein the additive includes at least one selected from the group consisting of LiPO2F2 and LiBC2O4F2,
wherein the resin substrate of the tape includes a polyolefin,
wherein the adhesive layer of the tape contains at least one selected from the group consisting of a rubber component, a silicone component, and an acrylic resin component, and
wherein a discharge capacity of the lithium primary battery is higher than a designed capacity by a rate of from 0% to 0.5%.