Battery charger

• US 6,329,790 B1
• Filed: 01/28/2000
• Issued: 12/11/2001
• Est. Priority Date: 01/28/2000
• Status: Expired due to Fees

• Current Assignee: Shayan Rahimi
• Original Assignee: Shayan Rahimi
• Inventors: Rahimi, Shayan
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): LUK, LAWRENCE W
• Application Number:
  US09/493,051
• Time in Patent Office: 683 Days
• Field of Search: 320/125, 320/110, 320/129, 320/130, 320/142, 320/149
• US Class Current: 320/125
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

A timed electric battery charger 10 for the processing of non-lithium, small appliance and utility batteries 19 through a charging cycle comprising a current source having an alternating current input 11 and a direct current output 14 and a timer 16 for dividing the charging cycle into a plurality of successive, predetermined phases, each phase comprising a duty cycle wherein a charging current is delivered to the battery, alternated with a resting cycle during which a charging current is not delivered to the battery.

Claims

1. A timed battery charger for processing a battery through a charging cycle, comprising:

a current source having an alternating current input and a direct current output for providing current at a single pre-determined level during the charging cycle;

controls means for dividing the charging cycle into a plurality of successive, predetermined phases, each phase comprising a duty cycle wherein the charging current from the current source is delivered to an external battery terminal, alternated with a resting cycle during which the charging current is not delivered to the external terminal of the battery;

further comprising a timer for determining the duration of the charging cycle;

wherein said timer is set to control the duration of the charging cycle for;

D type batteries at about 20 minutes;

C type batteries at about 15 minutes;

AA type batteries at about 10 minutes; and

AAA type batteries at about 3 minutes.

2. A timed battery charger for processing a battery through a charging cycle, comprising:

a current source having an alternating current input and a direct current output for providing current at a single pre-determined level during the charging cycle;

controls means for dividing the charging cycle into a plurality of successive, predetermined phases, each phase comprising a duty cycle wherein the charging current from the current source is delivered to an external battery terminal, alternated with a resting cycle during which the charging current is not delivered to the external terminal of the battery;

wherein the charging cycle comprises a plurality of successive resting and duty cycles wherein the duration of the duty cycle is between 60 and 30 seconds and the duration of the resting cycle is between 45 and 20 seconds.

3. A timed battery charger for processing a battery through a charging cycle, comprising:

a current source having an alternating current input and a direct current output for providing current at a single pre-determined level during the charging cycle;

controls means for dividing the charging cycle into a plurality of successive, predetermined phases, each phase comprising a duty cycle wherein the charging current from the current source is delivered to an external battery terminal, alternated with a resting cycle during which the charging current is not delivered to the external terminal of the battery;

wherein the charging cycle comprises a plurality of successive resting and duty cycles wherein the duration of the duty cycle does not exceed 45 seconds and the duration of the resting cycle does not exceed 20 seconds.

4. A timed battery charger for processing a battery through a charging cycle, comprising:

a current source having an alternating current input and a direct current output for providing current at a single pre-determined level during the charging cycle;

controls means for dividing the charging cycle into a plurality of successive, predetermined phases, each phase comprising a duty cycle wherein the charging current from the current source is delivered to an external battery terminal, alternated with a resting cycle during which the charging current is not delivered to the external terminal of the battery;

wherein the charging cycle comprises a plurality of successive resting and duty cycles wherein the duration of the duty cycle is about 40 seconds and the duration of the resting cycle is about 20 seconds.