DC backup power supply system

• US 20030222618A1
• Filed: 04/14/2003
• Published: 12/04/2003
• Est. Priority Date: 04/16/2002
• Status: Abandoned Application

• Current Assignee: Hitachi Computer Peripherals Company Limited (Hitachi, Ltd.), Hitachi, Ltd., Hitachi Maxell Limited (Maxell, Ltd.)
• Original Assignee: Hitachi Computer Peripherals Company Limited (Hitachi, Ltd.), Hitachi, Ltd., Hitachi Maxell Limited (Maxell, Ltd.)
• Inventors: Takahashi, Yoshihide, Hamaogi, Masahiro, Kanouda, Akihiko, Gotou, Takao, Takahashi, Fumikazu, Tanabe, Takashi, Nemoto, Minehiro, Isogai, Masato, Miyata, Toshikatsu
• Application Number:
  US10/412,231
• Publication Number:
  US 20030222618A1
• Time in Patent Office: Days
• US Class Current: 320/116
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 50/253 adapted for specific cells, e.g. electrochemical cells operating at high temperature
• CPC Class Codes: H01M 50/269 Mechanical means for varying the arrangement of batteries or cells for different uses, e.g. for changing the number of batteries or for switching between series and parallel wiring methods or arrangements for servicing or maintenance H01M6/50, H01M10/42
• CPC Class Codes: H02J 9/062 for AC powered loads
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A DC backup power supply system having a battery; a charge-discharge circuit for charging and discharging a power between the battery and a DC line; and a control circuit for controlling the charge-discharge circuit, wherein the battery has a number of battery cells and cylindrical portions of the battery cells are laid on an approximately horizontal plane.

Claims

1. A DC backup power supply system comprising:

a battery;

a charge-discharge circuit for charging and discharging a power between said battery and a DC line; and

a control circuit for controlling said charge-discharge circuit,

wherein said battery has a number of battery cells and cylindrical portions of the battery cells are laid on an approximately horizontal plane.

5. A DC backup power supply system according to claim 1, wherein said battery has 40 or more sub-C size nickel-metal-hydride battery cells.

6. A DC backup power supply system according to claim 5, wherein the nickel-metal-hydride battery cells include two or more parallel connections of nickel-metal-hydride battery cells.

9. A DC backup power supply system according to claim 1, wherein if a full-charged voltage of said battery is 48 V or lower, a voltage at the DC line is set to 51 to 55 V.

12. A DC backup power supply system according to claim 1, further comprising control means, when a power supplied from the DC line and consumed by a load exceeds a predetermined value, said control means activates the DC backup power supply system to supply a power to the load.

2. A DC backup power supply system comprising:

a battery;

a charge-discharge circuit for charging and discharging a power between said battery and a DC line; and

a control circuit for controlling said charge-discharge circuit,

wherein said battery has a number of battery cells, cylindrical portions of the battery cells are laid on an approximately horizontal plane, and a height of said battery is 45 mm or lower.

3. A DC backup power supply system comprising:

a battery;

a charge-discharge circuit for charging and discharging a power between said battery and a DC line; and

a control circuit for controlling said charge-discharge circuit,

wherein said battery has a number of battery cells, cylindrical portions of the battery cells are laid on an approximately horizontal plane, and said battery is accommodated in a space having a height corresponding to one unit (1U) size of a 19-inch rack.

4. A DC backup power supply system according to claim 3, wherein two DC backup power supply systems each having a rated output power of 700 W or larger are accommodated side by side in the space having the height corresponding to the one unit (1U) size.

7. A DC backup power supply system according to claim 3, wherein three DC backup power supply systems each having a rated output power of 400 W or larger are accommodated side by side in the space having the height corresponding to the one unit (1U) size.

8. A DC backup power supply system according to claim 7, wherein said battery has 20 or more sub-C size nickel-metal-hydride battery cells.

10. A DC backup power supply system according to claim 4, wherein the rated output power is supplied for 6 minutes or longer under the conditions that a temperature of said battery is 10°

C. or higher, an internal impedance of said battery is twice or lower than an initial value and said battery is in a full-charged state.

11. A DC backup power supply system comprising:

a battery;

a charge-discharge circuit for charging and discharging a power between said battery and a DC line; and

a control circuit for controlling said charge-discharge circuit,

wherein said battery has a number of battery cells, cylindrical portions of the battery cells are laid on an approximately horizontal plane, a plurality of DC backup power supply systems electrically connected in parallel are accommodated and juxtaposed in one rack, and the DC backup power supply systems have electric hot swap connections using connectors and cables.