Battery charger
First Claim
1. A battery charger comprising:
- a pair of charging terminals to which both end terminals of a secondary battery are connected, respectively,power source means for supplying the secondary battery connected to said charging terminals with a substantially constant charging current in a first time period and for supplying a substantially constant charging voltage to the secondary battery in a second time period,recharging detecting means for detecting the degree of recharging on the secondary battery to which the charging current is supplied from said power source means on the strength of a voltage between said charging terminals,timer means for measuring a predetermined time commencing when said recharging detecting means detects that the degree of recharging on the secondary battery supplied with the charging current from said power source means has reached a predetermined degree, said predetermined degree being within a range from seventy percent to ninety percent of full recharging,first recharging indicator means for indicating when said constant charging current is being supplied to the secondary battery connected to said charging terminals during said first time period, andsecond recharging indicator means different in appearance from said first indicator means for indicating when said timer means measures said predetermined time,whereby said first recharging indicator means and said second recharging indicator means indicate when the degree of recharging on the secondary battery has reached said predetermined degree.
1 Assignment
0 Petitions
Accused Products
Abstract
A battery charger is disclosed comprising a pair of charging terminals to which a secondary battery may be connected, a power source for supplying the charging terminals with a charging voltage, a recharging detector for detecting the degree of recharging on the secondary battery on the strength of the voltage between the charging terminals, and a timer operative to measure a predetermined time beginning when the recharging detector detects that the degree of recharging on the second battery has reached a predetermined degree set within a range from seventy percent to ninety percent of full recharging. The invention further includes a first recharging indicator, for example an LED, which indicates that the secondary battery is being charged up until the timing operation commences. Once the timing operation begins, a second recharging indicator, for example a differently colored LED, indicates that the secondary battery has been charged to the predetermined degree and is receiving a final charge during the timing operation.
23 Citations
10 Claims
-
1. A battery charger comprising:
-
a pair of charging terminals to which both end terminals of a secondary battery are connected, respectively, power source means for supplying the secondary battery connected to said charging terminals with a substantially constant charging current in a first time period and for supplying a substantially constant charging voltage to the secondary battery in a second time period, recharging detecting means for detecting the degree of recharging on the secondary battery to which the charging current is supplied from said power source means on the strength of a voltage between said charging terminals, timer means for measuring a predetermined time commencing when said recharging detecting means detects that the degree of recharging on the secondary battery supplied with the charging current from said power source means has reached a predetermined degree, said predetermined degree being within a range from seventy percent to ninety percent of full recharging, first recharging indicator means for indicating when said constant charging current is being supplied to the secondary battery connected to said charging terminals during said first time period, and second recharging indicator means different in appearance from said first indicator means for indicating when said timer means measures said predetermined time, whereby said first recharging indicator means and said second recharging indicator means indicate when the degree of recharging on the secondary battery has reached said predetermined degree. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification