Search International and National Patent Collections
|1. (WO2018123088) WOUND-TYPE BATTERY|
|Applicants:||MAXELL HOLDINGS, LTD.
In this wound-type battery having an electrode body formed by winding a positive electrode, a negative electrode, and a separator, wherein the negative electrode includes a metal alloyed with Li, the degradation of battery characteristics is prevented by suppressing the occurrence of deflection inside the electrode body due to the expansion of the negative electrode. This wound-type battery 1 is provided with: an electrode body 30 formed into a flat cross-sectional shape by winding a positive electrode 31, a negative electrode 32, and a separator 33 overlapping one other; and a battery case 2 in which the electrode body 30 is encapsulated. The negative electrode 32 has: a negative electrode part 51 including an element that can be alloyed with Li; and negative electrode end parts 52. The electrode body 30 has a spacer part 53 that is located at least between the negative electrode end parts 52 adjacent to one other in the radial direction of the electrode body 30, and that has a greater thickness than that of the positive electrode 31.