| abstract |
(57) [Summary] [Problem] It is easy to control the heat of a battery system. Provided is a battery system which can easily raise the temperature at the time of starting. SOLUTION: This is a battery system having an electrode group in which one or more complete solid electrodes including a positive electrode, a negative electrode, and a solid ion conductive layer are stacked, and a heat mediator for heating or cooling the electrode group. A battery system, wherein the electrode group and the heat mediator are provided adjacent to each other. |