JP5781591B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device that incorporates a battery and can be used even during a power failure.

  Since power supply from a commercial power source is interrupted during a power failure, lighting devices that can be used even during a power failure have been developed. Such an illumination device can charge a battery from a commercial power source during a non-power failure (normal time), and can turn on an illumination light source by supplying power from the charged battery during a power failure.

  As an illuminating device that can be used during a conventional power failure, for example, an emergency illuminating device disclosed in Patent Document 1 can be cited. The emergency lighting device disclosed in Patent Document 1 includes a battery, a charging circuit that charges the battery, and an inspection unit that determines the life of the battery.

  In addition, as a conventional emergency lighting device, it has been conventionally known to employ an LED as a light source, as in the device disclosed in Patent Document 2.

  Further, Patent Document 3 includes a wireless or wired communication unit in the illumination power supply device, receives battery information of a plurality of illumination power supply devices through communication, and controls charging and discharging of the batteries of each illumination power supply device. A lighting control system including a server that performs the above-described process is disclosed.

JP 2006-278242 A JP 2012-113907 A JP 2012-252832 A

  As described in Patent Document 1, it is extremely important to check the state of the battery inside the lighting device. However, the apparatus disclosed in Patent Document 1 is provided with an inspection switch, and can only monitor the quality of the battery by operating the inspection switch. For example, when a plurality of lighting devices are arranged in a large-scale facility such as the inside of a power plant or the inside of a subway, it is difficult to inspect each one of them.

In this regard, according to the illumination control system described in Patent Document 3, a plurality of illumination power supply devices can be managed by the server.
However, when a capacity detection unit or a control unit is housed inside an individual lighting power supply device as in Patent Document 3, it is impossible to manage on the server side until the capacity detection unit or the control unit is abnormal. There is.

  Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an illuminating device capable of reliably measuring not only the state of the battery of the illuminating device but also the state other than the battery.

According to the illumination device of the present invention, an LED light source, a battery connected to the LED light source, a charging circuit that supplies power to the battery from a commercial power source, and a commercial power source and the charging circuit are provided. A power failure detection circuit for detecting a power failure, an output switching circuit for turning on an LED light source by power feeding from the battery when a power failure is detected by the power failure detection circuit, a temperature sensor provided in the battery, and the temperature Sensor is connected to input temperature data, and battery voltage is connected to both poles of the battery, battery quality is determined based on the battery temperature and voltage, and the battery quality is determined. A measurement circuit that can output battery information and the battery information measured by the measurement circuit are communicated to an external device. First connector and the temperature data and the battery poles different battery condition a measurable external device and a voltage value the external device from the temperature sensor not through the measuring circuit is a connection terminal for And a second connector which is a connection terminal for outputting to the terminal.
By adopting this configuration, a plurality of battery states of the lighting device can be managed by making the external device connected to the first connector a device that can be centrally managed. Further, by adopting an external device provided with a measurement circuit in the external device connected to the second connector, the state of the battery can be directly measured via the second connector, and the inside of the lighting device connected to the first connector The presence or absence of an abnormality in the measurement circuit can be determined. That is, if there is an abnormality in the measurement circuit in the lighting device connected to the first connector, the abnormality in the measurement circuit in the lighting device cannot be determined from the external device connected to the first connector. By measuring the state of the battery with an external device connected to the connector, if there is a difference from the result measured from the first connector, it can be determined that there is an abnormality in the measurement circuit in the lighting device.

The temperature sensor that outputs temperature data to the second connector may be a second temperature sensor that is different from the temperature sensor connected to the measurement circuit.
According to this configuration, even when the temperature sensor connected to the measurement circuit has an abnormality, the normal temperature can be detected by the second temperature sensor.

The charging circuit may be a float charging circuit that supplies power to the battery from a commercial power source while supplying power to the LED light source.
According to this configuration, the battery can be always fully charged, and overcharging can be prevented to extend the battery life.

Further, the output switching circuit may be provided so as to be able to switch whether the LED light source is lit by a commercial power source or a battery by a switching signal input from the outside.
According to this configuration, for example, when it is better to turn on the LED light source with a battery due to a situation other than a power failure or for some reason, the LED light source can be turned on with the battery by inputting the switching signal from the outside. Further, when it is better to turn on with a commercial power supply after turning on with a battery, it is possible to switch to lighting with a commercial power supply.

The measurement circuit may measure the electrode resistance based on a voltage value and a current value at both electrodes of the battery.
According to this configuration, since the value of the electrode resistance can be further measured as the battery information, the battery capacity can be determined more accurately.

  According to the present invention, the state of the battery can be easily determined from the outside, and the state other than the battery can be reliably measured.

It is a block diagram of the lighting storage concerning this invention.

FIG. 1 shows a block diagram of a lighting device according to the present embodiment, and an internal configuration of the lighting device will be described.
The illuminating device 20 of this embodiment is a battery light installed in a power plant. The LED light 22 is turned on by power supply from a commercial power source during normal times, and the LED light is supplied by power supply from a built-in battery during a power failure. 22 is turned on.

The illuminating device 20 includes an LED light 22 (an LED light source referred to in the claims) and a built-in battery 24. As the battery 24, a lead storage battery having a rated voltage of 12V can be adopted.
The lighting device 20 is provided with a charging circuit 26 that charges the battery 24. A power supply line 25 from a commercial power supply is connected to the charging circuit 26. The commercial power supply in this embodiment is AC100V.
The power line 25 is provided with a power failure detection circuit 28 and a power switch 30. The power failure detection circuit 28 can determine whether or not the power supply from the commercial power source is cut off.

The charging circuit 26 of the present embodiment is a float charging circuit having an AC / DC converter.
That is, AC 100 V from the commercial power source (AC) is converted to DC 12 V via the charging circuit 26 and supplied to the LED light 22. At the same time, the charging circuit 26 supplies power to the commercial voltage battery 24 at normal times. The rated output voltage of the battery 24 is DC 12V, and the charging voltage is 13V. When the charging circuit 26 detects that the battery 24 is insufficiently charged, DC 13V is supplied to the battery 24, and when charging is completed (when it is detected that the battery is fully charged), charging of the battery 24 is terminated. Control. For this reason, it is possible to prevent the battery 24 from being overcharged.

The charging circuit 26 is provided with a float charging lamp 56 and a charger power lamp 57.
When the power switch 30 is turned on, the charger power lamp 57 is lit, and the float charging lamp 56 is lit while the float charging is being performed.

An LED light switch 29 that turns the LED light 22 on and off is provided in a power supply line 31 that supplies power to the LED light 22 from the charging circuit 26.
Further, the power supply line 31 is provided with an output switching circuit 32 that switches the power source of the LED light 22 to the battery 24 when a power failure is detected by the power failure detection circuit 28.
The output switching circuit 32 switches the power supply line 31 to the LED light 22 by a relay or the like provided therein.

The output switching circuit 32 can be connected to an external device via an external control circuit 34 and an external control connector 36. The external control circuit 34 outputs a control signal for switching between lighting with a commercial power source or lighting with the battery 24 to the output switching circuit 32 based on a signal input from an external device.
As an external device connected to the external control connector 36, a central control system (not shown) of a power plant can be cited. From the central control system, the power source of the LED light 22 of the lighting device 20 can be switched.

  As an external device connected to the external control connector 36, a fire detector or the like can be considered. When a fire is detected by the fire detector, a signal is input from the fire detector, and the power source of the LED light 22 of the lighting device 20 can be switched.

A temperature sensor 38 for detecting the battery temperature is attached to the battery 24.
The temperature sensor 38 is connected to the measurement circuit 40 and outputs detected temperature data to the measurement circuit 40.
In addition, measurement lines 42 a and 42 b connected to the measurement circuit 40 are connected to the positive electrode and the negative electrode of the battery 24, respectively.

The measurement circuit 40 will be described.
The measurement circuit 40 has a CPU that operates based on a predetermined program. Based on the temperature data input from the temperature sensor 38, the measurement circuit 40 determines that the battery is abnormal when the battery temperature is equal to or higher than a predetermined temperature.

Further, the measurement circuit 40 acquires the voltage value of the battery 24 from the measurement lines 42 a and 42 b connected to the positive electrode and the negative electrode of the battery 24. The measurement circuit 40 determines that the battery is abnormal when the voltage value of the battery is out of a predetermined range.
Specifically, since the battery 24 of the present embodiment has a rated voltage of 12 V, the measurement circuit 40 is preset with 11.8 V to 12.9 V as a predetermined range, and the voltage value of the battery 24 is 11.8 V. If it is detected below or 12.9 V or more, it is determined that the battery is abnormal.

Further, the measurement circuit 40 is also connected to the power supply line 31 so that the current value supplied from the battery 24 to the LED light 22 can be measured. The measurement circuit 40 can also measure the battery capacity corresponding to the electrode resistance value based on the voltage value and current value of the battery 24.
The measurement circuit 40 determines that the battery is abnormal when it detects that the battery capacity is equal to or greater than a predetermined value.

  The measurement circuit 40 outputs the result of determination regarding the battery temperature, voltage value, and battery capacity to the first connector 46 via the communication circuit 44. The measurement circuit 40 measures abnormalities in the battery temperature, voltage value, and battery capacity at predetermined intervals (for example, every 3 seconds) set in advance, and the result of whether the battery is normal or abnormal each time of measurement. Is output.

  In addition to determining the battery abnormality from the direct values of the battery temperature, voltage value and battery capacity described above, the measurement circuit 40 compares the battery temperature, voltage value and battery capacity value measured last time, If the difference is 50% abnormal, it also has a function to re-measure.

The communication circuit 44 is a circuit that converts data so that data can be communicated through a predetermined interface. The communication circuit 44 of the present embodiment is a driver IC capable of data communication with RS485, which is a serial communication standard.
The communication circuit 44 may be provided as a function of the measurement circuit 40.

  The first connector is a connector to which a communication cable can be connected so that connection to an external device is possible. Any connector that conforms to a communication standard with an external device may be used, and any connector that can communicate with RS485 in the present embodiment may be used.

The temperature sensor 38, the measurement lines 42a and 42b, the measurement circuit 40, the communication circuit 44, and the first connector 46 described above are connected to a central control system in a power plant as an example of an external device.
On the other hand, when the temperature sensor 38, the measurement circuit 40, and the communication circuit 44 become abnormal, the external device receives erroneous information about the battery status.
Therefore, in the lighting device of the present embodiment, a redundant circuit for measuring the normality / abnormality of the battery is provided.

The redundant circuit has the following configuration.
The redundant circuit 50 includes a second temperature sensor 48 that is attached to the battery 24 and detects a battery temperature, and a second connector 52. A redundant temperature measurement line 54 is connected between the second connector 52 and the second temperature sensor -48.
Redundant measurement lines 55a and 55b connected to the second connector 52 are connected to the positive electrode and the negative electrode of the battery 24, respectively.

As described above, the redundant circuit 50 is not provided with a measurement circuit or a communication circuit. Therefore, an external device connected to the second connector 52 of the redundant circuit 50 requires a device in which a circuit capable of measuring battery voltage and temperature data is built.
Such an external device may be a measuring device that can be carried by an operator by hand.

  Further, since the redundant circuit 50 is not provided with a measurement circuit and a communication circuit, accurate battery information can be obtained even when the measurement circuit 40 and the communication circuit 44 are abnormal.

  Note that the power supply line 31 is also connected to the redundant circuit 50 so that the current value supplied from the battery 24 to the LED light 22 can be measured.

  The lighting device according to the embodiment described above can be employed in various places such as a power plant and a subway yard.

20 lighting device 22 LED light 24 battery 25 power supply line 26 charging circuit 28 power failure detection circuit 29 light switch 30 power switch 31 power supply line 32 output switching circuit 34 external control circuit 36 external control connector 38 temperature sensor 40 measurement circuit 42a, 42b measurement line 44 Communication circuit 46 Connector 48 Temperature sensor 50 Redundant circuit 52 Second connector 54 Redundant temperature measurement line 55a, 55b Redundant measurement line 56 Float charging lamp 57 Charger power lamp

Claims (5)

An LED light source;
A battery connected to the LED light source;
A charging circuit for supplying power from a commercial power source to the battery;
A power failure detection circuit that is provided between a commercial power source and the charging circuit and detects a power failure;
When a power failure is detected by the power failure detection circuit, an output switching circuit that turns on the LED light source by power feeding from the battery, and
A temperature sensor provided in the battery;
The temperature sensor is connected to input temperature data, and the battery voltage value is input to both ends of the battery. The battery quality is determined based on the battery temperature and voltage value. A measurement circuit that can output the results as battery information;
A first connector which is a connection terminal for communicating battery information measured by the measurement circuit to an external device;
A connection terminal for outputting temperature data from the temperature sensor and voltage values of both electrodes of the battery to an external device capable of measuring a state of a battery different from the external device without passing through the measurement circuit. A lighting device comprising: a connector.   The lighting device according to claim 1, wherein the temperature sensor that outputs temperature data to the second connector is a second temperature sensor that is different from the temperature sensor connected to the measurement circuit.   The lighting device according to claim 1, wherein the charging circuit is a float charging circuit that supplies power to the LED light source from a commercial power source while supplying power to the LED light source.   The output switching circuit is provided so as to be able to switch whether the LED light source is lit by a commercial power source or a battery by a switching signal input from the outside. The lighting device of any one of them.   5. The illumination device according to claim 1, wherein the measurement circuit measures electrode resistance based on a voltage value at both electrodes of the battery and a current value flowing through the LED light source. .

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