Outer package and battery
The present disclosure is directed to a laminate-type outer package including a convex structure including a space to seal a power generating element. The convex structure includes a top surface including a first side, a second side, and a connection part that connects the first side and the second side. The outer package includes a first extension part that extends from a first crossing part where the connection part and the first side cross, a second extension part that extends from a second crossing part where the connection part and the second side cross, and an extension crossing part that connects the first extension part and the second extension part. The extension crossing part is lower than the top surface in a thickness direction. The outer package includes a tapered surface including the connection part, the first extension part and the second extension part as an outer periphery.
1 . A battery comprising:
a power generating element having a cathode active material layer, an anode active material layer, a solid electrolyte layer arranged between the cathode active material layer and the anode active material layer, a cathode current collector having a cathode tab, and an anode current collector having an anode tab;
a laminate-type outer package sealing the power generating element, the laminate-type outer package comprising:
a convex structure including a space to seal the power generating element; wherein the convex structure includes a top surface;
in a plan view, the top surface includes a first side, a second side that extends to a direction crossing to the first side, and a connection part that connects the first side and the second side;
in a plan view, the outer package includes a first extension part that extends from a first crossing part where the connection part and the first side are crossed, a second extension part that extends from a second crossing part where the connection part and the second side are crossed, and an extension crossing part that connects the first extension part and the second extension part;
the extension crossing part is in a position lower than that of the top surface in a thickness direction; and
the outer package includes a tapered surface including the connection part, the first extension part and the second extension part as an outer periphery; and
at least one spacer arranged to fill in a space between the power generating element and the outer package;
wherein the tapered surface includes a mountain fold part having a fold that is either:
connected to the connection part and spaced from the first extension part and the second extension part at the connection part, or
connected to the first extension part and the second extension part and spaced from the connection part:
wherein the at least one spacer includes a concave portion configured to fit a first corner and a second corner of the power generating element;
wherein the first corner is disposed in the concave portion and includes portions of the cathode active material layer, the solid electrolyte layer, and the cathode current collector;
wherein the second corner is disposed in the concave portion and includes portions of the anode active material layer, the solid electrolyte layer and the anode current collector;
wherein the at least one spacer includes a corresponding tapered surface capable of surface contact with the tapered surface in the outer package, the tapered surface and the corresponding tapered surface are arranged to oppose each other; and
wherein the at least one spacer includes a holder part that fixes at least one of the cathode tab or the anode tab of the power generating element.
2 . The battery according to claim 1 , wherein the connection part includes a straight line part in a plan view.
3 . The battery according to claim 1 , wherein, in a plan view, the first side and the first extension part are parallel, and the second side and the second extension part are parallel.
4 . The battery accordingly to claim 1 , wherein the mountain fold part of the tapered surface includes one edge connected to the connection part and another edge connected to the extension crossing part.
5 . The battery accordingly to claim 1 , wherein the mountain fold part of the tapered surface includes one edge connected to the first extension part and another edge connected to the second extension part.
6 . The battery accordingly to claim 1 , wherein the corresponding tapered surface of the at least one spacer decreases in thickness.
7 . The battery according to claim 1 , wherein the fold of the mountain fold part is connected to the first extension part and the second extension part and spaced from the connection part.
8 . The battery according to claim 1 , wherein the fold of the mountain fold part is connected to the connection part and spaced from the first extension part and the second extension part at the connection part.
9 . The battery according to claim 1 , wherein the mountain fold part is different from the first extension part and the second extension part.
10 . A battery comprising:
a power generating element;
a laminate-type outer package sealing the power generating element, the laminate-type outer package comprising:
a convex structure including a space to seal the power generating element; wherein the convex structure includes a top surface;
in a plan view, the top surface includes a first side, a second side that extends to a direction crossing to the first side, and a connection part that connects the first side and the second side;
in a plan view, the outer package includes a first extension part that extends from a first crossing part where the connection part and the first side are crossed, a second extension part that extends from a second crossing part where the connection part and the second side are crossed, and an extension crossing part that connects the first extension part and the second extension part;
the extension crossing part is in a position lower than that of the top surface in a thickness direction; and
the outer package includes a tapered surface including the connection part, the first extension part and the second extension part as an outer periphery; and
a spacer arranged to fill in a space between the power generating element and the outer package;
wherein the spacer includes a corresponding tapered surface capable of surface contact with the tapered surface in the outer package, the tapered surface and the corresponding tapered surface are arranged to oppose each other;
wherein the tapered surface includes a mountain fold part, the mountain fold part having a first tapered surface and a second tapered surface formed by the mountain fold part within the outer periphery;
wherein the mountain fold part of the tapered surface includes a fold between the first tapered surface and the second tapered surface; and
wherein the spacer includes a holder part that fixes a tab of the power generating element.
11 . The battery according to claim 10 , wherein the connection part includes a straight line part in the plan view.
12 . The battery according to claim 10 , wherein, in a plan view, the first side and the first extension part are parallel, and the second side and the second extension part are parallel.
13 . The battery according to claim 10 , wherein the mountain fold part of the tapered surface includes one edge connected to the connection part and another edge connected to the extension crossing part.
14 . The battery according to claim 10 , wherein the mountain fold part of the tapered surface includes one edge connected to the first extension part and another edge connected to the second extension part.
15 . The battery according to claim 10 , wherein the corresponding tapered surface of the spacer decreases in thickness.
16 . The battery according to claim 10 , wherein the spacer includes a concave portion configured to fit a corner of the power generating element.
17 . The battery according to claim 10 , wherein the fold of the mountain fold part is connected to the first extension part and the second extension part and spaced from the connection part.
18 . The battery according to claim 10 , wherein the fold of the mountain fold part is connected to the connection part and spaced from the first extension part and the second extension part at the connection part.
19 . The battery according to claim 10 , wherein the mountain fold part is different from the first extension part and the second extension part.