Secondary battery, secondary battery system, and control method

Patent metadata

Field	Value
Publication number	US-2022336856-A1
Application number	US-202017639284-A
Country	US
Kind code	A1
Filing date	Aug 28, 2020
Priority date	Aug 30, 2019
Publication date	Oct 20, 2022
Grant date	—

Abstract

A secondary battery according to an embodiment includes an electrolyte, a cathode, and an anode. The electrolyte includes zinc, indium, bismuth, and a halogen species. The cathode and the anode are disposed in the electrolyte.

First claim

1 . A secondary battery comprising:
an electrolyte comprising zinc, indium, bismuth, and a halogen species; and a cathode and an anode disposed in the electrolyte.

2 . The secondary battery according to claim 1 , wherein
the halogen species comprises a chlorine ion.

3 . The secondary battery according to claim 1 , wherein
the halogen species comprises a bromine ion.

4 . The secondary battery according to any one of claim 1 , wherein
a molar concentration of the bismuth is smaller than a molar concentration of the indium.

5 . The secondary battery according to any one of claim 1 , further comprising:
a flow device configured to cause the electrolyte to flow.

6 . A secondary battery system comprising:
the secondary battery described in any one of claim 1 ; and a controller configured to control the secondary battery; wherein the controller is configured to control charging of the secondary battery based on amounts of the indium, the bismuth, and the zinc in the electrolyte.

7 . The secondary battery system according to claim 6 , wherein
the controller controls the charging of the secondary battery to ensure a current density I [mA·cm −2 ] of the anode and a flow rate R [cm·sec −1 ] of the electrolyte flowing between the cathode and the anode satisfy a relationship 0.01≤C Zn ×R 1/3 ×C In −1 ×I −1 ≤300 where a molar concentration of the indium in the electrolyte is C In [mol·dm −3 ] and a molar concentration of the zinc is C Zn [mol·dm −3 ].

8 . The secondary battery system according to claim 7 , wherein
the controller controls the charging of the secondary battery to ensure a relationship C Zn ×R 1/3 × C In −1 × I −1 ≥0.6 is satisfied.

9 . The secondary battery system according to claim 7 , wherein
the controller controls the charging of the secondary battery to ensure a relationship C Zn ×R 1/3 × C In −1 × I −1 ≤70.2 is satisfied.

10 . A control method executed by a secondary battery that comprises:
a cathode and an anode; an electrolyte comprising zinc, indium, bismuth, and a halogen species, the electrolyte contacting the cathode and the anode; and a flow device configured to cause the electrolyte to flow, the control method comprising: controlling a current density of the anode during charging and a flow rate of the electrolyte flowing between the cathode and the anode based on amounts of the indium and the zinc in the electrolyte.

Assignees

• Kyocera Corp

Inventors

• Ohkuma Takeshi
• Wakashima Ryo

Classifications

• H01M10/0567 Primary

  characterised by the additives · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M10/44

  Methods for charging or discharging (circuits for charging H02J7/00) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2300/0014

  Alkaline electrolytes · CPC title