Emergency power supply with selectable detection modes

Abstract

The utility model provides an emergency power supply with selectable detection modes, which comprises an energy storage and emergency power supply unit and a control unit, and the control unit is electrically connected with the energy storage and emergency power supply unit and is used for controlling the emergency output of the energy storage and emergency power supply unit. Wherein the control unit has an automatic detection mode for starting emergency output detection at regular time and a manual detection mode for starting emergency output detection according to manual triggering, and is provided with a mode selection switch, and the mode selection switch can be switched to have a conduction state and a disconnection state; wherein in one of the on state and the off state, the automatic detection mode takes effect, and in the other state, the automatic detection mode fails, so that the selectivity of the detection mode is realized, and the use requirements of different users are considered.

Description

Technical Field

[0001] This utility model relates to the field of emergency lighting, and in particular to an emergency power supply with selectable detection modes. Background Technology

[0002] Emergency lighting fixtures are lighting devices activated in response to power outages or failures in normal lighting. The emergency power supply in an emergency lighting system provides emergency power to the fixtures when normal lighting power is interrupted or fails. The fixtures function as both emergency lighting and normal lighting fixtures when normal lighting power is available. Specifically, when mains power is normal, it supplies power to the fixtures via a driver and simultaneously charges the battery pack in the emergency power supply. When mains power fails or fails, the battery pack discharges to supply power to the fixtures via the emergency driver module, ensuring lighting and providing emergency illumination for evacuation and safety.

[0003] However, since a sudden power outage or failure of the mains power supply is a low-probability event, the emergency lighting system will theoretically not be activated for a long time. This makes it difficult to guarantee that the emergency lighting system, which has not been activated for a long time, can work normally in the event of a sudden power outage. Therefore, in order to ensure that the emergency lighting system can play an effective role at critical moments, it is essential to conduct regular inspections of the emergency lighting system.

[0004] Therefore, existing emergency lighting systems are equipped with detection functions. To facilitate these detections, they are often performed automatically periodically via built-in programs. These programs time a specific period, and after the timer expires, the detection function automatically starts, simulating a power outage and powered by the battery. After the detection is complete, the system automatically switches back to normal power and restarts the timer, repeating this cycle periodically. However, because the system automatically performs the detection after the timer expires and disconnects the mains power to stop normal lighting, sudden activation during normal working hours can disrupt daily life and production, posing safety hazards. Furthermore, since the detection also checks the battery's health, it requires a discharge period of 1.5 hours (or even 3 hours) before assessment. During this time, the lights remain in emergency lighting mode, leading to a poor user experience. Therefore, some users do not want automatic detection in their emergency lighting systems. To address this need, some emergency power supplies on the market employ a manual detection function, requiring maintenance personnel to manually activate and perform the detection periodically. To meet these two different needs, on the production side, manufacturers need to set up two types of products for the same product, one for self-testing and the other for manual testing, and the corresponding circuits also need to be designed accordingly, which undoubtedly increases the manufacturer's R&D and production costs. Summary of the Invention

[0005] One objective of this invention is to provide an emergency power supply with selectable detection modes, wherein the emergency power supply has an automatic detection mode and a manual detection mode, and is configured to allow selection of at least one of the automatic detection mode and the manual detection mode as the mode for activating the detection function, so as to meet different user needs.

[0006] Another objective of this invention is to provide an emergency power supply with selectable detection modes, wherein the emergency power supply with selectable detection modes is equipped with both an automatic detection mode and a manual detection mode, so that there is no need to set up two models according to different user needs, which helps to reduce the manufacturer's research and development and production costs.

[0007] Another objective of this invention is to provide an emergency power supply with selectable detection modes. The selectable detection mode of the emergency power supply is based on the selectability of the automatic detection mode and the manual detection mode. Users can turn off the automatic detection mode independently, which can prevent the selectable detection mode emergency power supply from suddenly starting the detection function and affecting the normal production and life order.

[0008] Another objective of this invention is to provide an emergency power supply with selectable detection modes, wherein the emergency power supply with selectable detection modes includes a mode selection switch, wherein the mode selection switch is switchably configured to have an on state and an off state, wherein in one of the on state and the off state of the mode selection switch, the automatic detection mode is active, and in the other state, the automatic detection mode is disabled, so as to select whether to turn the automatic detection mode on or off based on the switching of the mode selection switch between the on state and the off state, so as to meet different user needs.

[0009] Another objective of this invention is to provide an emergency power supply with selectable detection modes, wherein preferably, the automatic detection mode and the manual detection mode are selected, so that the emergency power supply with selectable detection modes is used as a self-testing model in the automatic detection mode and as a manual detection model in the manual detection mode, which conforms to the user's usage habits of the product.

[0010] Another objective of this invention is to provide an emergency power supply with selectable detection modes, wherein the automatic detection mode and the manual detection mode are selectively chosen to avoid the emergency power supply automatically starting the detection when the user selects to use the manual detection function, thereby preventing the emergency power supply with selectable detection modes from suddenly starting the detection function and affecting normal production and life.

[0011] Another objective of this utility model is to provide an emergency power supply with selectable detection modes, wherein, corresponding to the on state of the mode selection switch, the automatic detection mode is disabled and the manual detection mode is active; corresponding to the off state, the automatic detection mode is active and the manual detection mode is disabled. Thus, by switching between the on and off states of the mode selection switch, the automatic detection mode and the manual detection mode can be selected, which conforms to the user's usage habits and is easy to set.

[0012] Another objective of this invention is to provide an emergency power supply with selectable detection modes, wherein the mode selection switch includes a mode selection interface, wherein the mode selection interface is adapted to connect to a selection element, and the state in which the selection element is connected to the mode selection interface corresponds to the conducting state, and the state in which the selection element is not connected to the mode selection interface corresponds to the disconnected state, so as to facilitate mode switching.

[0013] Another objective of this invention is to provide an emergency power supply with selectable detection modes, wherein the mode selection interface has pins that are electrically connected to the pins of the corresponding MCU / microcontroller, and the selection element is implemented as a shorting cap to facilitate mode switching.

[0014] Another objective of this invention is to provide an emergency power supply with selectable detection modes, wherein the emergency power supply with selectable detection modes has a constant output power and thus a relatively constant emergency power supply duration, without the need to configure different energy storage batteries for different loads.

[0015] According to one aspect of the present invention, the present invention provides an emergency power supply with selectable detection modes, wherein the emergency power supply with selectable detection modes includes:

[0016] An energy storage and emergency power supply unit; and

[0017] A control unit, wherein the control unit is electrically connected to the energy storage and emergency power supply unit and is configured to control the emergency output of the energy storage and emergency power supply unit, wherein the control unit has an automatic detection mode for periodically detecting the emergency output and a manual detection mode for detecting the emergency output based on manual triggering, and is configured with a mode selection switch, wherein the mode selection switch is switchable to have an on state and an off state, wherein the automatic detection mode is active in one of the on state and the off state, and the automatic detection mode is inactive in the other state.

[0018] In one embodiment, when the mode selection switch is in the ON state, the automatic detection mode is disabled and the manual detection mode is active; when the circuit is open, the automatic detection mode is active and the manual detection mode is disabled.

[0019] In one embodiment, the emergency power supply with selectable detection mode includes a manual detection button, wherein the manual detection button is electrically connected to the control unit, and performs emergency output detection when the manual detection button is pressed.

[0020] In one embodiment, the mode selection switch includes a mode selection interface, wherein the mode selection interface is adapted to connect a selection element, and the state in which the selection element is connected to the mode selection interface corresponds to the on state, and the state in which the selection element is not connected to the mode selection interface corresponds to the off state.

[0021] In one embodiment, the control unit includes an MCU / microcontroller, the mode selection interface has pins electrically connected to the pins of the MCU / microcontroller, and the selector is implemented as a jumper cap.

[0022] In one embodiment, the energy storage and emergency power supply unit includes a battery, a charging circuit, and an emergency power supply circuit. The charging circuit is electrically connected to the battery and the control unit and is controlled by the control unit to receive electrical energy to charge the battery. The emergency power supply circuit is electrically connected to the battery and the control unit to output electrical energy at a constant power under the control unit.

[0023] In one embodiment, the emergency power supply circuit includes an output voltage acquisition circuit and an output current acquisition circuit electrically connected to the control unit. The output voltage acquisition circuit is used to detect the output voltage of the emergency power supply circuit, and the output current acquisition circuit is used to detect the output current of the emergency power supply circuit. The control unit controls the output of the emergency power supply circuit based on the detection results of the output voltage acquisition circuit and the output current acquisition circuit.

[0024] In one embodiment, the emergency power supply with selectable detection mode includes a control switch, wherein the control switch is connected to the control unit and adapted to be set at the input terminal of the corresponding drive power supply, wherein in the state of emergency output detection of the control unit, the control switch disconnects the power input of the corresponding drive power supply to simulate an emergency state.

[0025] In one embodiment, the emergency power supply with selectable detection mode includes an AC-DC circuit, wherein the input of the AC-DC circuit is adapted to be connected to mains power, and the output of the AC-DC circuit is electrically connected to the energy storage and emergency power supply unit and the control unit.

[0026] In one embodiment, the selectable detection mode emergency power supply includes a mains power detection circuit, wherein the mains power detection circuit is connected to the input terminal of the selectable detection mode emergency power supply and the control unit to detect the mains voltage.

[0027] The further objectives and advantages of this invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0028] Figure 1 This is a wiring diagram of an emergency power supply with selectable detection mode for an emergency lighting system according to an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of an emergency power supply with selectable detection modes according to the above embodiments of the present invention.

[0030] Figure 3This is a circuit diagram of a manual detection button for an emergency power supply with selectable detection modes according to the above embodiments of the present invention.

[0031] Figure 4 This is a circuit diagram of an option for an emergency power supply that allows selection of the detection mode according to the above embodiments of the present invention.

[0032] Figure 5 This is a circuit diagram of a control unit for an emergency power supply with selectable detection modes according to the above embodiments of the present invention.

[0033] Figure 6 This is a partial circuit diagram of an emergency power supply with selectable detection modes according to the above embodiments of the present invention.

[0034] Figure 7 This is a partial circuit diagram of an emergency power supply with selectable detection modes according to the above embodiments of the present invention. Detailed Implementation

[0035] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0036] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0037] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0038] Refer to the accompanying drawings in the specification of this utility model. Figures 1 to 7An embodiment of the present invention, a selectable detection mode emergency power supply 10, is illustrated. The selectable detection mode emergency power supply 10 is connected to a drive power supply 20 and a lighting load 30. When the mains power is normal, the lighting load 30 is powered by the drive power supply 20. When the mains power fails, the selectable detection mode emergency power supply 10 powers the lighting load 30. The selectable detection mode emergency power supply 10 has an emergency output detection function. When the emergency output detection function is activated, the power input of the drive power supply 20 is disconnected to simulate an abnormal mains power situation. The selectable detection mode emergency power supply 10 then powers the lighting load 30, thereby ensuring the normal operation of the selectable detection mode emergency power supply 10 and meeting relevant regulatory requirements.

[0039] Specifically, the selectable detection mode emergency power supply 10 has an automatic detection mode and a manual detection mode, and is configured to be selectable to perform emergency output detection function using at least one of the automatic detection mode and the manual detection mode. Corresponding to the automatic detection mode, the selectable detection mode emergency power supply 10 automatically performs emergency output detection based on a corresponding timer. Corresponding to the manual detection mode, the selectable detection mode emergency power supply 10 performs emergency output detection based on manual triggering. That is to say, the selectable detection mode emergency power supply 10 can be manually triggered or automatically triggered, which can meet different user needs and eliminates the need to set up two models for different user needs, which helps to reduce the manufacturer's R&D and production costs. At the same time, based on the selectability of the automatic detection mode and the manual detection mode, the user can turn off the automatic detection mode to avoid the selectable detection mode emergency power supply 10 suddenly starting the detection function and affecting the normal production and life order.

[0040] Specifically, the selectable detection mode emergency power supply 10 includes a control unit 11 and an energy storage and emergency power supply unit 12. The control unit 11 is electrically connected to the energy storage and emergency power supply unit 12 and is configured to control the emergency output of the energy storage and emergency power supply unit 12. The control unit 11 has an automatic detection mode for periodically detecting emergency output and a manual detection mode for detecting emergency output based on manual triggering. It is also equipped with a mode selection switch 111, which is switchable between a conducting state and an open state. In one of the conducting state and the open state, the automatic detection mode is active, and in the other state, the automatic detection mode is inactive. Specifically, in this embodiment of the present invention, in the conducting state of the mode selection switch 111, the automatic detection mode is inactive, and in the open state, the automatic detection mode is active. Based on the switching of the mode selection switch 111 between the conducting state and the open state, the automatic detection mode can be turned on or off to meet different user needs.

[0041] Specifically, in this invention, in the on state, the automatic detection mode is disabled, and the emergency power supply 10 selectable by the detection module performs emergency output detection based on manual triggering. In the off state, the automatic detection mode is active, and the emergency power supply 10 selectable by the detection module performs emergency output detection based on corresponding timing. Correspondingly, in some embodiments, the manual detection mode is fixedly set to the active state, that is, regardless of whether the automatic detection mode is active or not, the emergency power supply 10 selectable by the detection module can perform emergency output detection based on manual triggering.

[0042] It is worth mentioning that when the mode selection switch 111 is switched to the conducting state, the automatic detection mode is disabled. In other words, among the emergency power supplies 10 with selectable detection modes, the automatic detection mode can be turned off. Users can choose to turn off the automatic detection mode to prevent the emergency power supply 10 with selectable detection modes from suddenly starting the detection function and affecting normal production and life.

[0043] Preferably, in this invention, the automatic detection mode and the manual detection mode are selectively chosen, that is, when the automatic detection mode is active, the manual detection mode is inactive, and when the automatic detection mode is active, the manual detection mode is inactive, so that the emergency power supply 10 selectable by the detection mode is used as a self-test model in the automatic detection mode and as a manual test model in the manual detection mode, which conforms to the user's usage habits of the product.

[0044] It is understood that the automatic detection mode being active means that the emergency power supply 10 selected by the detection mode automatically performs emergency output detection based on the corresponding time interval, while the manual detection mode being active means that the emergency power supply 10 selected by the detection mode needs to be manually triggered to perform emergency output detection. In other words, the corresponding detection mode being active does not mean that the emergency power supply 10 selected by the detection mode performs emergency output detection, but rather refers to the conditions under which the emergency power supply 10 selected by the detection mode is triggered to perform emergency output detection.

[0045] It is worth mentioning that the automatic detection mode and the manual detection mode are selected to avoid the emergency power supply 10 of the detection mode from starting the detection automatically when the user selects to use the manual detection function. This can prevent the emergency power supply 10 of the detection mode from suddenly starting the detection function and affecting the normal production and life order.

[0046] Specifically, in this embodiment of the present invention, the control unit 11 includes an MCU / microcontroller, the mode selection switch 111 includes a mode selection interface, the mode selection interface has pins electrically connected to the pins of the MCU / microcontroller, the mode selection interface is adapted to connect a selection element 112, and the state in which the selection element 112 is connected to the mode selection interface corresponds to the open circuit state, and the state in which the selection element is not connected to the mode selection interface corresponds to the closed circuit state, so as to facilitate mode switching.

[0047] refer to Figure 4 As shown, the selection element 112 is a shorting cap, the mode selection switch 111 is in the off state by default, and is switched to the on state based on the shorting cap being connected to the mode selection interface, thereby realizing the mode switching.

[0048] Furthermore, the emergency power supply 10 with selectable detection modes includes a manual detection button 13, wherein the manual detection button 13 is electrically connected to the control unit 11, and in the open circuit state, when the manual detection button 13 is pressed, an emergency output detection is performed.

[0049] Furthermore, the selectable detection mode emergency power supply 10 includes a control switch 16, which is connected to the control unit 11 and adapted to be located at the input terminal of the drive power supply 20. During emergency output detection by the control unit 11, the control switch 16 disconnects the power input of the drive power supply 20 to simulate an emergency state. The control switch 16 can be implemented as an electronic switch, such as a relay, and is normally closed, only to be electrically opened by the control unit 11 during emergency output detection.

[0050] Furthermore, the emergency power supply 10 selected by the detection mode has a constant output power, and thus a relatively constant emergency power supply duration, without the need to configure different energy storage batteries for different lighting loads 30.

[0051] Specifically, the energy storage and emergency power supply unit 12 includes a battery 121, a charging circuit 122, and an emergency power supply circuit 123. The charging circuit 122 is electrically connected to the battery 121 and the control unit 11, and is controlled by the control unit 11 to receive electrical energy to charge the battery 121. The emergency power supply circuit 12 is electrically connected to the battery 121 and the control unit 11, and is controlled by the control unit 11 to output electrical energy at a constant power.

[0052] In detail, the emergency power supply circuit 123 includes an output voltage acquisition circuit 1231 and an output current acquisition circuit 1232 electrically connected to the control unit 11. The output voltage acquisition circuit 1231 detects the output voltage of the emergency power supply circuit 123, and the output current acquisition circuit 1232 detects the output current of the emergency power supply circuit 123. The control unit 11 controls the output of the emergency power supply circuit 123 based on the detection results of the output voltage acquisition circuit 1231 and the output current acquisition circuit 1232. Specifically, the control unit 11 calculates the output power based on the voltage and current detected by the output voltage acquisition circuit 1231 and the output current acquisition circuit 1232, compares the output power with the target constant power, and increases or decreases the duty cycle of the PWM constant power control terminal to change the magnitude of the output current / voltage. Constant power output is achieved through multiple cycles of PWM adjustment. The control unit 11 achieves constant power output by changing the output current / voltage through PWM control of the battery-powered driver chip's operating time.

[0053] It is worth mentioning that, based on the detection results of the output voltage acquisition circuit 1231 and the output current acquisition circuit 1232, it is also possible to determine whether the emergency power supply of the emergency power supply 10 selectable in the detection mode is normal when performing emergency output detection.

[0054] In the automatic detection mode, when the timer reaches the set time, the control unit 11 controls the control switch 16 to disconnect the power input of the drive power supply 20 to simulate an emergency state for emergency output detection. The energy storage and emergency power supply unit 12 outputs electrical energy, and the voltage and current are detected by the output voltage acquisition circuit 1231 and the output current acquisition circuit 1232 to calculate the power and determine whether the power supply of the energy storage and emergency power supply unit 12 is normal.

[0055] In the manual detection mode, when the manual detection button 13 is operated, the control unit 11 controls the control switch 16 to disconnect the power input of the drive power supply 20 to simulate an emergency state for emergency output detection. The energy storage and emergency power supply unit 12 outputs electrical energy, and the voltage and current are detected by the output voltage acquisition circuit 1231 and the output current acquisition circuit 1232 to calculate the power and determine whether the power supply of the energy storage and emergency power supply unit 12 is normal.

[0056] Furthermore, the emergency power supply 10 with selectable detection mode includes an AC-DC circuit 15, wherein the input terminal of the AC-DC circuit 15 is adapted to be connected to mains power, and the output terminal of the AC-DC circuit 15 is electrically connected to the energy storage and emergency power supply unit 12 and the control unit 11, so as to access mains power and convert it into DC power to charge the energy storage and emergency power supply unit 12 and to power the control unit 11.

[0057] Furthermore, the selectable detection mode emergency power supply 10 includes a mains power detection circuit 14, wherein the mains power detection circuit 14 is connected to the input terminal of the selectable detection mode emergency power supply 10 and the control unit 11 to detect the mains voltage. For example, if the mains power detection circuit 14 detects that the mains voltage is lower than 60% of the standard input voltage, it determines that the mains power supply is abnormal, and the selectable detection mode emergency power supply 10 starts emergency power supply.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. An emergency power supply with selectable detection modes, characterized in that, include: An energy storage and emergency power supply unit; and A control unit, wherein the control unit is electrically connected to the energy storage and emergency power supply unit and is configured to control the emergency output of the energy storage and emergency power supply unit, wherein the control unit has an automatic detection mode for periodically detecting the emergency output and a manual detection mode for detecting the emergency output based on manual triggering, and is configured with a mode selection switch, wherein the mode selection switch is switchable to have an on state and an off state, wherein the automatic detection mode is active in one of the on state and the off state, and the automatic detection mode is inactive in the other state.

2. The emergency power supply with selectable detection modes according to claim 1, wherein when the mode selection switch is in the ON state, the automatic detection mode is disabled and the manual detection mode is active; when the circuit is open, the automatic detection mode is active and the manual detection mode is disabled.

3. The emergency power supply with selectable detection modes according to claim 1 or 2, wherein the emergency power supply with selectable detection modes includes a manual detection button, wherein the manual detection button is electrically connected to the control unit, and when the manual detection button is pressed, emergency output detection is activated.

4. The emergency power supply with selectable detection mode according to claim 3, wherein the mode selection switch includes a mode selection interface, wherein the mode selection interface is adapted to connect to a selection element, and the state in which the selection element is connected to the mode selection interface corresponds to the conducting state, and the state in which the selection element is not connected to the mode selection interface corresponds to the disconnected state.

5. The emergency power supply with selectable detection mode according to claim 4, wherein the control unit includes an MCU / microcontroller, the mode selection interface has pins electrically connected to the pins of the MCU / microcontroller, and the selection element is implemented as a jumper cap.

6. The emergency power supply with selectable detection mode according to claim 5, wherein the energy storage and emergency power supply unit includes a battery, a charging circuit and an emergency power supply circuit, wherein the charging circuit is electrically connected to the battery and the control unit and is controlled by the control unit to access electrical energy to charge the battery, wherein the emergency power supply circuit is electrically connected to the battery and the control unit to output electrical energy at a constant power under the control of the control unit.

7. The emergency power supply with selectable detection mode according to claim 6, wherein the emergency power supply circuit includes an output voltage acquisition circuit and an output current acquisition circuit electrically connected to the control unit, wherein the output voltage acquisition circuit is used to detect the output voltage of the emergency power supply circuit, the output current acquisition circuit is used to detect the output current of the emergency power supply circuit, and the control unit controls the output of the emergency power supply circuit based on the detection results of the output voltage acquisition circuit and the output current acquisition circuit.

8. The emergency power supply with selectable detection mode according to claim 7, wherein the emergency power supply with selectable detection mode includes a control switch, wherein the control switch is connected to the control unit and adapted to be set at the input terminal of the corresponding drive power supply, wherein when the control unit activates emergency output detection, the control switch disconnects the power input of the corresponding drive power supply to simulate an emergency state.

9. The emergency power supply with selectable detection mode according to claim 8, wherein the emergency power supply with selectable detection mode includes an AC-DC circuit, wherein the input terminal of the AC-DC circuit is adapted to be connected to mains power, and the output terminal of the AC-DC circuit is electrically connected to the energy storage and emergency power supply unit and the control unit.

10. The detection mode selectable emergency power supply according to claim 9, wherein the detection mode selectable emergency power supply includes a mains power detection circuit, wherein the mains power detection circuit is connected to the input terminal of the detection mode selectable emergency power supply and the control unit to detect the mains voltage.

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