1. Technical Field
The disclosure generally relates to a test apparatus, especially to a battery capacity test apparatus.
2. Description of Related Art
Electronic devices such as mobile phones and notebooks require high quality storage batteries, which must be tested before use. While capacity of the batteries needs to be determined, many test methods require special apparatus, which is expensive and increases costs.
Therefore there is a need for improvement in the art.
Many aspects of the embodiments can be better understood with references to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.
Referring to
Referring to
The comparator module 200 includes a comparator chip U1. The comparator chip U1 includes a plurality of input terminals IN1˜IN5, output terminals OUT1˜OUT5, a reference terminal Vref, a power terminal VDD and a ground terminal GND. The input terminals IN1˜IN5 are electrically connected to the plurality of connection points between the plurality of resistors R1˜R6 respectively. The comparator chip U1 is configured to output the control signals by the plurality of output terminals OUT1˜OUT5 according to comparison results. The reference terminal Vref is configured to output the reference voltage. The power terminal VDD is electrically connected to the ground terminal GND via a capacitor C1. In one embodiment, the capacity of the battery 400 is 3.7V˜4.2V when fully charged. The reference voltage is 1.25 V.
Referring to
The indication module 300 includes a plurality of LEDs D1˜D5 and resistors R7˜R11. Anodes of the plurality of LEDs D1˜D5 are electrically connected to the plurality of output terminals OUT1˜OUT5 by the plurality of resistors R7˜R11 respectively. Cathodes of the plurality of LEDs D1˜D5 are grounded.
In use, the switch S1 is activated, and the voltage regulator module 100 receives the voltage signal from the battery 400 and outputs the plurality of sub-voltages via the plurality of connection points between the plurality of resistors R1˜R6. The plurality of input terminals IN1˜IN5 receives the plurality of sub-voltages. The comparator chip U1 compares the plurality of sub-voltages with the 1.25V reference voltage and outputs the control signals via the plurality of output terminals OUT1˜OUT5 according to the comparison results. When the plurality of sub-voltages received by the plurality of input terminals IN1˜IN5 exceed the 1.25V reference voltage, the comparator chip U1 outputs high voltage level control signals to the plurality of LEDs D1˜D5 by the corresponding output terminals OUT1˜OUT5. The corresponding LEDs D1˜D5 emit light. When the plurality of sub-voltages received by the plurality of input terminals IN1˜IN5 are less than the 1.25V reference voltage, the comparator chip U1 outputs low voltage level control signals to the plurality of LEDs D1˜D5 by the corresponding output terminals OUT1˜OUT5. The corresponding LEDs D1˜D5 do not emit light.
When the battery 400 is full, the plurality of LEDs D1˜D5 emits light; when the battery 400 is 80% full, the LED D5 does not emit light; and the LEDs D1˜D4 emit light; when the battery 400 is 60% full, the LEDs D5 and D4 do not emit light and the LEDs D1˜D3 emit light; when the capacity of the battery 400 is 40% full, the LEDs D5˜D3 do not emit light; and the LEDs D1 and D2 emit light; when the battery 400 is 20% full, the LEDs D5˜D2 do not emit light; and the LED D1 emits light; and when the capacity of the battery 400 is empty, none of the plurality of LEDs D1˜D5 emit light.
It is to be understood, however, that even though numerous characteristics and advantages have been set forth in the foregoing description of preferred embodiments, together with details of the structures and functions of the preferred embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Number | Date | Country | Kind |
---|---|---|---|
201010261577.X | Aug 2010 | CN | national |