Claims
- 1. A charge/discharge control circuit comprising:
- an electric power source having a first electric power source and a second electric power source which are connected in series with each other;
- first overcharge/overdischarge detection means and second overcharge/overdischarge detection means provided independently of said first electric power source and said second electric power source, respectively;
- control means for outputting a signal for controlling the charge/discharge of said electric power source in accordance with signals from said first overcharge/overdischarge detection means and said second overcharge/overdischarge detection means; and
- intermediate voltage receiving means for receiving a voltage of a junction connected between said first electric power source and said second electric power source and outputting a signal to inform a relation of relative voltage between them, operation of the intermediate voltage receiving means being controlled in accordance with the signal from said control means.
- 2. A chargeable electric power source apparatus having a secondary cell having a first cell and a second cell which are connected in series with each other, switching means provided between said secondary cell and an external cell terminal, and charge/discharge control means connected in parallel to said secondary cell for controlling said switching means, said charge/discharge control means comprising:
- first overcharge/overdischarge detection means and second overcharge/overdischarge detection means provided independently of said first cell and said second cell, respectively;
- control means for logically converting, into a signal for controlling said switching means, signals from said first overcharge/overdischarge detection means and said second overcharge/overdischarge detection means; and
- intermediate voltage receiving means for receiving a voltage of a junction connected between said first cell and said second cell and outputting a signal to inform a relation of relative voltage between them, operation of said intermediate voltage receiving means being controlled in accordance with the signal from said control means.
Priority Claims (18)
Number |
Date |
Country |
Kind |
4-313515 |
Nov 1992 |
JPX |
|
5-3561 |
Jan 1993 |
JPX |
|
5-51110 |
Mar 1993 |
JPX |
|
5-52476 |
Mar 1993 |
JPX |
|
5-56208 |
Mar 1993 |
JPX |
|
5-57563 |
Mar 1993 |
JPX |
|
5-57564 |
Mar 1993 |
JPX |
|
5-62259 |
Mar 1993 |
JPX |
|
5-62260 |
Mar 1993 |
JPX |
|
5-65758 |
Mar 1993 |
JPX |
|
5-67132 |
Mar 1993 |
JPX |
|
5-94677 |
Apr 1993 |
JPX |
|
5-120198 |
May 1993 |
JPX |
|
5-126238 |
May 1993 |
JPX |
|
5-220279 |
Sep 1993 |
JPX |
|
5-223647 |
Sep 1993 |
JPX |
|
5-224186 |
Sep 1993 |
JPX |
|
5-261285 |
Oct 1993 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 08/154,463 filed Nov. 17, 1993.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
5519563 |
Higashijima et al. |
May 1996 |
|
5530336 |
Eguchi et al. |
Jun 1996 |
|
5547775 |
Eguchi et al. |
Aug 1996 |
|
5554919 |
Uchida |
Sep 1996 |
|
5617010 |
Higashijima et al. |
Apr 1997 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
154463 |
Nov 1993 |
|