SULFIDE SOLID BATTERY SYSTEM AND METHOD FOR CONTROLLING SULFIDE SOLID BATTERY

• US 20150002101A1
• Filed: 03/06/2012
• Published: 01/01/2015
• Est. Priority Date: 03/06/2012
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hasegawa, Hajime, Omori, Keisuke, Tsuchida, Yasushi
• Application Number:
  US14/378,026
• Publication Number:
  US 20150002101A1
• Time in Patent Office: Days
• US Class Current: 320/134
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 4/587 for inserting or intercalating light metals
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

The present invention provides a sulfide solid battery system including: a solid battery including a cathode layer, an anode layer and a solid electrolyte layer disposed between the cathode layer and the anode layer; and a controller capable of controlling a charge-stopping voltage of the solid battery, wherein: LiNi_xCo_yMn_zO₂ (x+y+z=1 and 0.32<x, y, z<0.34) is employed for the cathode layer and a sulfide solid electrolyte is employed at least for the solid electrolyte layer; and the charge-stopping voltage of the solid battery is controlled by the controller in charging the solid battery so that the charging is stopped at 4.3 V or less with reference to a potential at which graphite stores/releases lithium ions, in order to improve a cycle characteristics of the sulfide solid battery.

Claims

1. A sulfide solid battery system comprising:

a solid battery including a cathode layer, an anode layer and a solid electrolyte layer disposed between the cathode layer and the anode layer; and

a controller capable of controlling a charge-stopping voltage of the solid battery,

wherein

LiNi_xCo_yMn_zO₂ (x+y+z=1 and 0.32<

x, y, z<

0.34) is employed for the cathode layer and a sulfide solid electrolyte is employed at least for the solid electrolyte layer, and

the charge-stopping voltage of the solid battery is controlled by the controller in charging the solid battery so that the charging is stopped at 4.3 V or less with reference to a potential at which graphite stores/releases lithium ions.

2. A sulfide solid battery system comprising:

a solid battery including a cathode layer, an anode layer and a solid electrolyte layer disposed between the cathode layer and the anode layer; and

a controller capable of controlling a discharge-stopping voltage of the solid battery,

wherein

LiNi_xCo_yMn_zO₂ (x+y+z=1 and 0.32<

x, y, z<

0.34) is employed for the cathode layer and a sulfide solid electrolyte is employed at least for the solid electrolyte layer, and

the discharge-stopping voltage of the solid battery is controlled by the controller in discharging the solid battery so that the discharging is stopped at 3.4 V or more with reference to a potential at which graphite stores/releases lithium ions.

3. The sulfide solid battery system according to claim 2,

wherein

the controller is also capable of controlling a charging-stopping voltage of the solid battery

and the charge-stopping voltage of the solid battery is controlled by the controller in charging the solid battery so that the charging is stopped at 4.4 V or less with reference to the potential at which graphite stores/releases lithium ions.

4-6. -6. (canceled)