Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
Reexamination Certificate
1999-06-23
2001-06-19
Wong, Peter S. (Department: 2838)
Electricity: measuring and testing
Electrolyte properties
Using a battery testing device
C370S902000, C340S636210, C702S063000
Reexamination Certificate
active
06249126
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the field of a capacity detecting circuit for a battery, and especially to a capacity detection circuit with a function that allows it to detect the capacity of the battery and that will also be able to automatically cut off the power supply to the electric circuit of the drive controlling device when there is a mismatch of polarities, a short circuit, or even an over-discharge from the battery.
BACKGROUND OF THE INVENTION
According to the speedy progress of modern society, the living standard of people is improving day by day and the current scientific technology also makes progress at a tremendous pace, leaving more leisure time and increasing the demand for convenient transportation by developing all kinds of transportation vehicles such as a bicycle, motorcycle, automobile, train, airplane, vessel, etc. For example, it is now a common situation for people with personal taste in enjoying leisure time to own at least one or even several luxury cars. The images of free transportation, comfortable interior decoration, and a wide-range of fanciful daydreams make a car become an incredible enjoyment in everyone's mind, a place for taking refuge and a place for the people to run after their favorite models from every kind of media.
A car is not just the most convenient vehicle in the world. Whether in the form of a sedan, wagon . . . , etc., a car is the best thing for travelling, especially in the hot season in case of no vacant hotel room, in which case the vehicle itself will settle the big headache by serving as a place to sleep.
Even having all kinds of the benefits from vehicles, one problem of car-owners is that someone might forget to turn off the headlights of the vehicle, or turn on the stereo equipment, fan, or even high beam for a long period of time, and force the battery to over-discharge and hence have it burn down or die. Furthermore the huge current caused by a car accident or short circuit might not only burn down the battery but also caused serious fires etc., which tragedies could be prevented if there was a device on the vehicles which had the function of an auto-cut off. Solving this problem of modern people has become a very important topic in present-day living.
SUMMARY OF THE INVENTION
In light of the above matters and based on good experience in studying and researching the field of designing and manufacturing a vehicle's batteries for many years, the inventor has thus created the present invention in order to overcome the known problems of the battery, and so as to achieve a practical effect at the same time.
Therefore, the preferred purpose of the invention is to provide a capacity detecting circuit for a battery that allows detection of the capacity of the battery and cut off of the power supply when the battery capacity is either insufficient or the battery is overcharged.
Another preferred purpose of the present invention is to supply a capacity detecting circuit for a battery that has a simple structure and a special function of detecting the capacity under different loading conditions.
Thus, according to an embodiment of the invention, it is desired to provide a capacity detecting circuit for a battery that comprises a voltage detecting circuit, a current detecting circuit, a switching circuit, a capacity display circuit, a timing circuit, and a driving circuit etc., which are all fixed onto appropriate positions of the battery. The current detecting circuit and voltage detecting circuit are installed in parallel, and the switching circuit is actually one kind of electronic switch and is installed at a position between the current detecting circuit and the capacity display circuit. The capacity display circuit comprises more than one set of LEDs and resistances. The design for the timing circuit is to add and install a timing loop circuit in the voltage detecting circuit and, furthermore, in the driving circuit, there is also an extra driving loop circuit which is installed onto the voltage detecting circuit.
An embodiment of the present invention will now be described by way of example with reference to the accompanying drawings.
REFERENCES:
patent: 6064182 (2000-05-01), Eguchi
Bacon & Thomas PLLC
Toatley , Jr. Gregory J.
Wong Peter S.
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