Capacitor device and wiring pattern

• US 7,457,100 B2
• Filed: 09/01/2004
• Issued: 11/25/2008
• Est. Priority Date: 09/03/2003
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Watanabe, Yoshihiro, Nakajima, Norio, Moriyama, Kouji
• Primary Examiner(s): Ha; Nguyen T
• Application Number:
  US10/568,678
• Publication Number:
  US 20060279257A1
• Time in Patent Office: 1,546 Days
• Field of Search: 361328-330, 361/306.1, 361/306.3, 361311-313, 361302-305, 361/763, 361/765
• US Class Current: 361/328
• CPC Class Codes: H01L 27/0802 Resistors only
• CPC Class Codes: H01L 27/0805 Capacitors only
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A capacitor device is provided which includes a plurality of electric double-layer capacitors connected in series, and a balance resistor portion where five resistors having an equivalent resistance are connected in parallel. In this capacitor device, the balance resistor portion is connected to each electric double-layer capacitor, so that the electric double-layer capacitors connected in series can be charged uniformly.

Claims

1. A capacitor device, comprising:

a plurality of electric double-layer capacitors connected in series; and

a plurality of balance resistor portions each comprising m resistors connected in parallel with each other and having equivalent resistance to each other, m being an integer greater than or equal to two;

the plural balance resistor portions being connected in parallel to the plural electric double-layer capacitors, respectively.

2. The capacitor device according to claim 1, wherein the resistance of at least one of the balance resistor portions is equal to, or less than, one-fourth the resistance of each resistor of said at least one of the balance resistor portions.

3. The capacitor device according to claim 1, wherein the resistance of at least one of the balance resistor portions is equal to, or more than, one-sixth the resistance of each resistor of said at least one of the balance resistor portions.

4. The capacitor device according to claim 1, wherein the resistance of at least one of the balance resistor portions is equal to, or more than, one-sixth the resistance of each resistor of said at least one of the balance resistor portions and is equal to, or less than, one-fourth the resistance of each resistor of the at least one of the balance resistor portions.

5. The capacitor device according to claim 1, wherein the resistance of at least one of the balance resistor portions is greater than or equal to 100Ω

or above and less than or equal to 500Ω

.

6. The capacitor device according to claim 1, wherein the number of electric double-layer capacitors connected in series is set so that a bias voltage given to each electric double-layer capacitor is lower than the rated voltage of the electric double-layer capacitor.

7. The capacitor device according to claim 1, wherein one or a plurality of electric double-layer capacitors are further connected in parallel to at least one of the balance resistor portions.

8. A wiring pattern comprising:

three or more wiring patterns disposed at a predetermined interval;

a plurality of electric double-layer capacitors connected in parallel between adjacent wiring patterns; and

between two adjacent electric double-layer capacitors which are connected between the wiring patterns, a plurality of resistors, having an equivalent resistance, connected in parallel to the electric double-layer capacitors.

9. The wiring pattern according to claim 8, wherein the resistors are connected from one wiring surface of the wiring pattern, and the electric double-layer capacitors are connected from another wiring surface of the wiring pattern.