US Pat. No. 10,893,576

HEATING SYSTEM FOR A GARMENT OR OTHER FABRIC OBJECT AND POWER CONTROL FOR EMBEDDED POWERED COMPONENTS

Teiimo GmbH, Gilching (D...

1. A garment or fabric article comprising an electrical system embedded in the garment or fabric article, the electrical system comprising:an electrical bus;
one or more powered components connected to the electrical bus;
at least two removable power sources electrically connected to the one or more powered components via the electrical bus, each power source comprising an on-board charging circuit;
an input for connection to an external power source other than the at least two removable power sources, wherein each of the at least two removable power sources is rechargeable and configured to receive a charge from the external power source without removal of the at least two removable power sources from the garment or fabric article;
at least one controller electrically connected to the at least two removable power sources, the at least one controller comprising at least two circuits, each circuit connected to one of the at least two removable power sources via the electrical bus, each circuit comprising a switch activated to permit the connected removable power source to discharge only when voltage outside the connected removable power source is lower than inside the connected removable power source as determined by a logical voltage comparative function of the controller, the controller configured (a) to prevent an uncontrolled exchange of power or facilitate a controlled exchange of power between the at least two removable power sources when each has a different electrical potential from the other, and (b) to permit a continuous supply of power to the electrical bus (i) when fewer than all of the at least two removable power sources are disconnected and (ii) during connection or disconnection from the external power source.