STACKED ALL-SOLID-STATE BATTERY

• US 20170162854A1
• Filed: 10/20/2016
• Published: 06/08/2017
• Est. Priority Date: 12/02/2015
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: SUGIURA, Koichi
• Granted Patent: US 10,103,376 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 2200/103 Fuse
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/54 Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
• CPC Class Codes: H01M 50/581 in response to temperature
• CPC Class Codes: H01M 50/583 in response to current, e.g. fuses
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A stacked all-solid-state battery includes: a stacked body including stacked power generation elements each having a cathode current collector layer and so on; and an antecedent short circuit layer arranged outside the stacked body. In the battery, at least one of the cathode current collector layer and the anode current collector layer includes a fuse portion that fuses by overcurrent, the antecedent short circuit layer includes a first metal layer, a second metal layer and an aluminum layer provided between the first and second metal layers and including an oxide film on its surface; the elements have a parallel connection to each other, and the first and second metal layers are respectively and electrically connected with the cathode and anode current collector layers.

Claims

1. A stacked all-solid-state battery comprising:

a stacked body including a plurality of power generation elements stacked each other; and

an antecedent short circuit layer arranged outside the stacked body,

wherein;

each of the plurality of power generation elements includes a cathode current collector layer, a cathode material layer, a solid electrolyte layer, an anode material layer, and an anode current collector layer stacked each other;

at least one of the cathode current collector layer and the anode current collector layer includes a fuse portion that fuses by overcurrent;

the antecedent short circuit layer includes a first metal layer, a second metal layer, and an aluminum layer provided between the first metal layer and the second metal layer, the aluminum layer including an oxide film on its surface;

the power generation elements are electrically connected to each other in parallel;

the first metal layer is electrically connected with the cathode current collector layer; and

the second metal layer is electrically connected with the anode current collector layer.

2. The stacked all-solid-state battery according to claim 1, wherein a stacking direction of the cathode current collector layer, the cathode material layer, the solid electrolyte layer, the anode material layer, and the anode current collector layer in each of the plurality of power generation elements, a stacking direction of the plurality of power generation elements in the stacked body, a stacking direction of the first metal layer, the aluminum layer, and the second metal layer in the antecedent short circuit layer, and a stacking direction of the stacked body and the antecedent short circuit layer are the same.

3. The stacked all-solid-state battery according to claim 1, wherein outer edges of the cathode material layer, the solid electrolyte layer, and the anode material layer are located on an inner side than an outer edge of the antecedent short circuit layer.

4. The stacked all-solid-state battery according to claim 1, wherein the first metal layer includes the same material as a material constituting the cathode current collector layer, and the second metal layer includes the same material as a material constituting the anode current collector layer.

5. The stacked all-solid-state battery according to claim 2, wherein outer edges of the cathode material layer, the solid electrolyte layer, and the anode material layer are located on an inner side than an outer edge of the antecedent short circuit layer.

6. The stacked all-solid-state battery according to claim 2, wherein the first metal layer includes the same material as a material constituting the cathode current collector layer, and the second metal layer includes the same material as a material constituting the anode current collector layer.

7. The stacked all-solid-state battery according to claim 3, wherein the first metal layer includes the same material as a material constituting the cathode current collector layer, and the second metal layer includes the same material as a material constituting the anode current collector layer.