Emergency system for power failures

• US 9,653,930 B2
• Filed: 05/23/2012
• Issued: 05/16/2017
• Est. Priority Date: 06/07/2011
• Status: Active Grant

• Current Assignee: VARTA Microbattery GmbH (VARTA AG)
• Original Assignee: VARTA Microbattery GmbH (VARTA AG)
• Inventors: Hald, Rainer, Pytlik, Edward
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): Piggush, Aaron
• Application Number:
  US14/123,546
• Publication Number:
  US 20140103882A1
• Time in Patent Office: 1,819 Days
• Field of Search: 320132, 320134, 320150, 320152
• CPC Class Codes: H02J 7/007194 of the battery

Abstract

An emergency system for power failures includes a single-cell or multiple-cell rechargeable battery selected from the group consisting of NiMH, NiCd, NiZn, Ag₂O/Zn or lithium-ion, and a charging electronics system that charges the battery, wherein the charging electronics system provides a charging voltage at which the battery does not overcharge at a temperature of up to 80° C., and wherein the charging electronics system supplies a charging voltage at which the battery is transferred into a charging state and/or is kept in a charging state, in which the battery is charged to 5% to 30%.

Claims

1. An emergency system for power failures comprising a single-cell or multiple-cell rechargeable battery selected from the group consisting of NiMH, NiCd, NiZn, Ag₂O/Zn or lithium-ion, and a charging electronics system that charges said battery, wherein the charging electronics system is configured to provide a charging voltage at which the battery does not overcharge at a temperature of −

10°

C. to 85°

C. and which transfers the battery into a charging state in which said battery is charged to 5% to 30% of its nominal capacity and, when this capacity is reached, to end the charging process or to continue the aforementioned charging process only to compensate self-discharge of the battery.

2. A printed circuit board for a data-processing device comprising the emergency system as claimed in claim 1.

3. An emergency system for power failures comprising a single-cell or multiple-cell rechargeable battery selected from the group consisting of NiMH, NiCd, NiZn, Ag₂O/Zn or lithium-ion, and a charging electronics system that charges said battery, wherein the charging electronics system is configured to provide a charging voltage at which the battery does not overcharge at a temperature of −

10°

C. to 85°

C. and which transfers the battery into a charging state in which said battery is charged to 5% to 30% of its nominal capacity at 20±

2°

C. and, when this capacity is reached, to end the charging process or to continue the aforementioned charging process only to compensate self-discharge of the battery.

4. The emergency system as claimed in claim 3, wherein the charging electronics system transfers the battery is kept into a charging state in which said battery is charged to 10% to 20% of its nominal capacity at 20±

2°

C.

5. The emergency system as claimed in claim 3, wherein the battery is an NiMH battery and the charging voltage per cell is 1.325 V±

5 mV.

6. The emergency system as claimed in claim 3, wherein the battery is an NiCd battery and the charging voltage per cell is 1.335 V±

5 mV.

7. The emergency system as claimed in claim 3, wherein the battery is an NiZn battery and the charging voltage per cell is 1.900 V±

50 mV.

8. The emergency system as claimed in claim 3, wherein the battery is an Ag₂O/Zn battery and the charging voltage per cell is 1.605 V±

5 mV.

9. The emergency system as claimed in claim 3, wherein the battery is a lithium-ion battery with LiCoO₂ as active material and the charging voltage per cell is 1.875 V±

25 mV.

10. The emergency system as claimed in claim 3, wherein the battery and the charging circuit are arranged in a common housing, and electrical contacts are provided for the charging circuit to make contact with an external voltage source and for the battery to make contact with a device on the housing which is to be supplied with emergency power.

11. A printed circuit board for a data-processing device comprising the emergency system as claimed in claim 3.

12. A method of operating a data-processing device which has an emergency system comprising a single-cell or multiple-cell rechargeable battery selected from the group consisting of NiMH, NiCd, NiZn, Ag₂O/Zn or lithium-ion, and a charging electronics system that charges said battery, comprising keeping the battery 1) in a charging state by the charging electronics system in which charging state the battery does not overcharge at a temperature of −

10°

C. to 85°

C. and

     2) at 5% to 30% of its nominal capacity and, when this capacity is reached, to end the charging process or to continue the aforementioned charging process only to compensate self-discharge of the battery.

13. The method as claimed in claim 12, wherein the charging electronics systems keeps the battery at a charging state of 10% to 20% of its nominal capacity at 20±

2°

C.