Emergency lighting device having battery level indicating function
An emergency lighting device includes a rechargeable battery module, a charging control module, a processing module and an indicator module. The charging control module is connected to the rechargeable battery module, and has a first monitoring point and a second monitoring point. A first monitoring resistor is disposed between the first monitoring point and the positive electrode of the rechargeable battery module. The second monitoring resistor is disposed between the first and second monitoring points. The processing module is connected to the charging control module, and has a first monitoring pin and a second monitoring pin used to detect the first voltage of the first monitoring point and the second voltage of the second monitoring point respectively to perform a battery level calculating mode and obtain the estimated battery level. The processing module controls the indicator module to perform a light-emitting mode according to the estimated battery level.
1. An emergency lighting device having battery level indicating function, comprising:
a rechargeable battery module;
a charging control module connected to the rechargeable battery module, and having a first monitoring point and a second monitoring point, wherein a first monitoring resistor is disposed between the first monitoring point and a positive electrode of the rechargeable battery module, and a second monitoring resistor is disposed between the first monitoring point and the second monitoring point;
a processing module connected to the charging control module, and having a first monitoring pin and a second monitoring pin configured to detect a first voltage of the first monitoring point and a second voltage of the second monitoring point respectively to perform a battery level calculating mode in order to generate an estimated battery level of the rechargeable battery module; and
an indicator module connected to the processing module;
wherein the processing module is configured to control the indicator module according to the estimated battery level, whereby the indicator module performs a light-emitting mode corresponding to the estimated battery level.
2. The emergency lighting device having battery level indicating function as claimed in claim 1 , wherein the processing module is configured to execute the battery level calculating mode to calculate an average value of the first voltage and the second voltage so as to obtain the estimated battery level.
3. The emergency lighting device having battery level indicating function as claimed in claim 1 , wherein the processing module further comprises a first control pin and a second control pin, and the charging control module has a first switch, a second switch, a third switch and a fourth switch, wherein the first control pin is connected to a positive electrode of the rechargeable battery module via the first switch and the second switch, and the second control pin is connected to the positive electrode of the rechargeable battery module via the third switch and the fourth switch, wherein the processing module is configured to output low-level signals via the first control pin and the second control pin respectively during the battery level calculating mode in order to turn off the first switch, the second switch, the third switch and the fourth switch.
4. The emergency lighting device having battery level indicating function as claimed in claim 1 , further comprising a manual test switch module configured to generate a mode switching signal.
5. The emergency lighting device having battery level indicating function as claimed in claim 4 , wherein the processing module further comprises a test pin connected to the manual test switch module so as to receive the mode switching signal.
6. The emergency lighting device having battery level indicating function as claimed in claim 5 , wherein the processing module is configured to execute the battery level calculating mode according to the mode switching signal.
7. The emergency lighting device having battery level indicating function as claimed in claim 5 , wherein the processing module is configured to execute a transportation mode according to the mode switching signal.
8. The emergency lighting device having battery level indicating function as claimed in claim 5 , wherein the processing module is configured to execute a test mode according to the mode switching signal.
9. The emergency lighting device having battery level indicating function as claimed in claim 1 , further comprising an emergency power source module and an emergency light source module, wherein the emergency light source module is connected to the processing module and the rechargeable battery module, and the emergency light source module is connected to the emergency power source module, wherein the rechargeable battery module is configured to drive the emergency power source module, and the processing module is configured to adjust a voltage, applied to the emergency light source module, of the emergency power source module according to the estimated battery level, whereby a working time of the emergency light source module is equal to or greater than a default time threshold.
10. The emergency lighting device having battery level indicating function as claimed in claim 9 , further comprising an ambient light detecting module connected to the processing module and configured to detect an ambient light intensity in order to generate an ambient light brightness s signal, wherein the processing module is configured to adjust the voltage, applied to the emergency light source module, of the emergency power source module according to the ambient light brightness signal so as to change a brightness of the emergency light source module.