Stacked battery
Disclosed is a stacked battery including at least one short-circuit current shunt part and electric elements, wherein: the shunt part includes first and second current collector layers, and an insulating layer provided between the first and second current collector layers, all of these layers being stacked; each power generation element includes a cathode current collector layer, a cathode material layer, an electrolyte layer, an anode material layer, and an anode current collector layer all of these layers being stacked; the first current collector layer is electrically connected to the cathode current collector layer and the second current collector layer to the anode current collector layer; the electric elements are electrically connected in parallel; and the shunt part next to the electric elements includes a PPTC layer between the first current collector layer and the insulating layer and/or between the second current collector layer and the insulating layer.
1. A stacked battery comprising:
at least one short-circuit current shunt part; and
a plurality of electric elements,
the short-circuit current shunt part and the electric elements being stacked,
wherein:
the short-circuit current shunt part comprises a first current collector layer, a second current collector layer, and an insulating layer provided between the first and second current collector layers, all of these layers being stacked;
each electric element comprises a cathode current collector layer, a cathode material layer, an electrolyte layer, an anode material layer, and an anode current collector layer, all of these layers being stacked;
the first current collector layer is electrically connected to the cathode current collector layer;
the second current collector layer is electrically connected to the anode current collector layer;
the electric elements are electrically connected to each other in parallel; and
the short-circuit current shunt part next to the electric elements comprises a polymer positive temperature coefficient (PPTC) layer between the first current collector layer and the insulating layer and/or between the second current collector layer and the insulating layer.
2. The stacked battery according to claim 1 , wherein
the short-circuit current shunt part comprises a first short-circuit current shunt part close to the electric elements, and a second short-circuit current shunt part located on a side of the first short-circuit current shunt part opposite to the electric elements;
the first short-circuit current shunt part includes the PPTC layer; and
the second short-circuit current shunt part includes no PPTC layer.
3. The stacked battery according to claim 1 , wherein
the cathode current collector layer, the cathode material layer, the electrolyte layer, the anode material layer, and the anode current collector layer in each electric element are stacked in a stacking direction,
the electric elements are stacked in the stacking direction,
the first current collector layer, the insulating layer, and the second current, collector layer in the short-circuit current shunt part are stacked in the stacking direction, and
the short-circuit current shunt part and the electric elements are stacked in the stacking direction.
4. The stacked battery according to claim 1 , wherein the short-circuit current shunt part is provided at least outside the electric elements.