Metal-oxygen battery system having a suction function and a blowing function

Patent metadata

Field	Value
Publication number	US-2016149278-A1
Application number	US-201514944533-A
Country	US
Kind code	A1
Filing date	Nov 18, 2015
Priority date	Nov 18, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

A metal-oxygen battery system, in particular a lithium-oxygen battery system, includes at least one battery cell, in particular a lithium-oxygen cell, including an oxygen cathode, a metal anode, and a metal ion-conducting separator situated between the cathode and the anode. To increase the current carrying capacity, the battery system also includes a turbomachine system which is connected to the oxygen cathode in a gas-conducting manner and which may be switched over between a suction function and a blowing function, and/or an exhaust gas supply line for supplying a gas low in oxygen to the oxygen cathode. Also described is a corresponding operating method.

First claim

1 - 15 . (canceled)

16 . A metal-oxygen battery system, comprising:
at least one battery cell, including an oxygen cathode, a metal anode, and a metal ion-conducting separator situated between the cathode and the anode; and at least one of: (i) a turbomachine system connected to the oxygen cathode in a gas-conducting manner and which is switchable over between a suction function and a blowing function, and (ii) an exhaust gas supply line to supply a gas low in oxygen to the oxygen cathode.

17 . The battery system of claim 16 , wherein the exhaust gas supply line includes an exhaust gas container for storing and releasing a gas low in oxygen.

18 . The battery system of claim 16 , further comprising:
an oxygen container to store and release an oxygen-rich gas.

19 . The battery system of claim 17 , wherein at least one of the exhaust gas container and the oxygen container includes a pressure vessel.

20 . The battery system of claim 16 , wherein the exhaust gas supply line includes an exhaust gas supply line shut-off element for openably blocking the exhaust gas supply line, and/or wherein the oxygen container includes an oxygen container-shut-off element for openably blocking the oxygen container.

21 . The battery system of claim 16 , wherein the turbomachine system includes a turbomachine, and a line system equipped with at least one shut-off element, and wherein the turbomachine system is switchable over between the suction function and the blowing function by activating at least one shut-off element.

22 . The battery system of claim 16 , wherein the turbomachine system includes:
a turbomachine; an operating gas supply line to supply an operating gas to the oxygen cathode; an oxygen discharge line to discharge an oxygen-rich gas from the oxygen cathode; an oxygen discharge line shut-off element to openably block the oxygen discharge line; an oxygen opening to exhaust oxygen-rich gas from the turbomachine; and an oxygen opening shut-off element to openably block the oxygen opening; and wherein gas is suppliable by the turbomachine to the oxygen cathode via the operating gas supply line, gas is suppliable from the oxygen cathode to the turbomachine via the oxygen discharge line, and gas is exhaustible from the turbomachine via the oxygen opening, and in particular is admittable into the oxygen container.

23 . The battery system of claim 16 , wherein the turbomachine system is switchable over between the suction function and the blowing function by activating the oxygen discharge line shut-off element and/or the oxygen opening shut-off element,
wherein during the suction operation of the turbomachine system, the oxygen discharge line is opened by the oxygen discharge line shut-off element, and the oxygen opening is opened by the oxygen opening shut-off element, in particular during the suction operation of the turbomachine system, the operating gas supply line is closed by the oxygen discharge line shut-off element and/or by the oxygen opening shut-off element, and wherein during the blowing operation of the turbomachine system, the oxygen discharge line is closed by the oxygen discharge line shut-off element, in particular during the blowing operation of the turbomachine system, the operating gas supply line is opened by the oxygen discharge line shut-off element and by the oxygen opening shut-off element.

24 . The battery system of claim 16 , wherein oxygen or oxygen-rich gas is recyclable and/or circulatable by the turbomachine system.

25 . The battery system of claim 21 , wherein the turbomachine is a compressor.

26 . The battery system of claim 16 , wherein the at least one battery cell includes a lithium-oxygen cell, and the anode is a lithium anode, in particular made of metallic lithium or a lithium alloy, and the separator is conductive for lithium ions.

27 . An operating method for operating a metal-oxygen battery system, the method comprising:
performing at least one of the following:
storing a gas low in oxygen which remains at an oxygen cathode during discharging; and
expelling oxygen released at an oxygen cathode during charging from the oxygen cathode by a gas;
wherein the metal-oxygen battery system includes:
at least one battery cell, including the oxygen cathode, a metal anode, and a metal ion-conducting separator situated between the cathode and the anode; and
at least one of: (i) a turbomachine system connected to the oxygen cathode in a gas-conducting manner and which is switchable over between a suction function and a blowing function, and (ii) an exhaust gas supply line to supply a gas low in oxygen to the oxygen cathode.

28 . The battery system of claim 27 , wherein oxygen which is released at the oxygen cathode during charging is stored, and/or wherein oxygen which has been stored beforehand during charging is supplied to the oxygen cathode during discharging.

29 . The battery system of claim 27 , wherein air is enriched with stored oxygen and supplied to the oxygen cathode during discharging.

30 . The battery system of claim 27 , wherein air which is supplied from the outside, and/or stored oxygen, and/or wherein stored gas low in oxygen is/are compressed.

31 . The battery system of claim 16 , wherein the metal-oxygen battery system includes a lithium-oxygen battery system, and wherein the at least one battery cell includes a lithium-oxygen cell.

Assignees

• Bosch Gmbh Robert

Inventors

• Woehrle Thomas
• Eberle Felix
• Schumann Bernd
• Wurm Calin Iulius
• Godbole Vikram Anil

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M12/08

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01M12/02 Primary

  Details (of electrodes H01M4/00; of non-active parts H01M50/00) · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title