Solid-state battery having a heat receiving member embedded in an insulating coating, battery module, and charging method of solid-state battery

A battery module comprising:

• a support;
• a solid-state battery arranged on the support, wherein the solid-state battery comprises:
• a battery element including alternating positive electrode layers and negative electrode layers each separated by a respective solid electrolyte layer interposed in between;
• a positive electrode terminal that is attached to the battery element to be electrically connected to the positive electrode layers and electrically separated from the negative electrode layers;
• a negative electrode terminal that is attached to the battery element to be electrically connected to the negative electrode layers and electrically separated from the positive electrode layers;
• an insulating coating that covers the battery element, wherein a respective portion of each of the positive electrode terminal and the negative electrode terminal lead out of the covered battery element;
• and
• a heat receiving member embedded in the insulating coating so as to be partially exposed and separated from the battery element such that the insulating coating is interposed between the battery element and the heat receiving member, and electrically separated from both the positive electrode terminal and the negative electrode terminal, wherein a thermal conductivity of the heat receiving member is higher than a thermal conductivity of the insulating coating;
• a heating source arranged on the support at a position different from a position where the solid-state battery is arranged;
• and
• a heat transfer member, arranged on the support, that is thermally connected to the solid-state battery and the heating source.

A method for charging a solid-state battery, the method comprising:

• providing a solid-state battery that includes:
• a battery element including alternating positive electrode layers and negative electrode layers each separated by a respective solid electrolyte layer interposed in between;
• a positive electrode terminal that is attached to the battery element and electrically connected to the positive electrode layers and electrically separated from the negative electrode layers;
• a negative electrode terminal that is attached to the battery element and electrically connected to the negative electrode layers and electrically separated from the positive electrode layers;
• an insulating coating that covers the battery element, wherein a respective portion of each of the positive electrode terminal and the negative electrode terminal lead out of the covered battery element;
• and
• a heat receiving member embedded in the insulating coating so as to be partially exposed and separated from the battery element such that the insulating coating is interposed between the battery element and the heat receiving member, and electrically separated from both the positive electrode terminal and the negative electrode terminal, wherein a thermal conductivity of the heat receiving member is higher than a thermal conductivity of the insulating coating;
• heating the solid-state battery via the heat receiving member that is embedded in the insulating coating covering the battery element of the solid-state battery;
• measuring a heating attribute of the solid-state battery;
• determining whether the heating attribute of the solid-state battery meets a charging prerequisite for initiating charging the solid-state battery;
• and
• in response to determining that the heat attribute meets the charging prerequisite, charging the solid-state battery.