A mining intrinsically safe power supply box and power supply device

Abstract

This application provides an intrinsically safe power supply box and power supply device for mining, including an AC / DC conversion unit, a battery pack, a power unit, a power management unit, and multiple intrinsically safe output units. The input terminal of the AC / DC conversion unit is connected to the main power grid, the output terminal of the AC / DC conversion unit is connected to the first input terminal of the power unit, the output terminal of the battery pack is connected to the second input terminal of the power unit, the output terminal of the power unit is connected to the intrinsically safe output units, and the control terminal of the power unit is connected to the power management unit. The power management unit can drive the power supply input path of the power unit to switch between the AC / DC conversion unit and the second input terminal, and in the event of an abnormal output state of the AC / DC conversion unit, drive the battery pack to supply power to the power unit, and drive the power unit to provide low-power output to the intrinsically safe output units. This application can reduce the cost and difficulty of power supply loop construction in existing technologies and improve the power supply duration of the intrinsically safe power supply box for mining.

Description

Technical Field

[0001] This application relates to the field of power supply box technology, and in particular to an intrinsically safe power supply box and power supply device for mining. Background Technology

[0002] Intrinsically safe power supply boxes for mining serve as backup power sources, continuing to supply power to intrinsically safe electrical equipment such as sensors and cameras even when the main power grid in the mine fails. Powered by backup batteries, this ensures the operation of critical underground electrical equipment. To improve the long-term operation of critical underground electrical equipment under special circumstances, existing technologies typically involve low-power research and modifications to the power supply loop. For example, low-power studies are conducted on load equipment, or low-power designs are implemented for specific detection circuits within the power supply unit. However, low-power modifications to the power supply loop often involve significant challenges and high costs. Therefore, providing a low-power intrinsically safe power supply box and power supply device for mining that can reduce the cost and difficulty of modifying the power supply loop using existing technologies is of significant practical importance. Utility Model Content

[0003] This application aims to at least partially address one of the technical problems in the related art.

[0004] Therefore, the first objective of this application is to propose an intrinsically safe power supply box and power supply device for mining, which can actively switch to a low-power operating mode when the main power grid of the mine fails, and ensure the operation of key electrical equipment underground, thereby increasing the power supply duration of the intrinsically safe power supply box.

[0005] To achieve the above objectives, a first aspect of this application provides an intrinsically safe power supply box for mining applications, comprising an AC / DC conversion unit, a battery pack, a power unit, a power management unit, and multiple intrinsically safe output units; wherein,

[0006] The input terminal of the AC / DC conversion unit is connected to the main power grid, and the output terminal of the AC / DC conversion unit is connected to the first input terminal of the power unit; the output terminal of the battery pack is connected to the second input terminal of the power unit, the output terminal of the power unit is connected to the intrinsically safe output unit, and the control terminal of the power unit is connected to the power management unit.

[0007] The power management unit is configured to drive the power supply input path of the power unit to switch between the first input terminal and the second input terminal, and to drive the power unit to obtain power from the battery pack and to drive the power unit to output power to the intrinsically safe output unit in the event of an abnormal output state of the AC / DC conversion unit.

[0008] Optionally, the power management unit has two operating modes: a normal mode and a low-power mode. When the output state of the AC / DC conversion unit is normal, the power management unit is in the normal mode and drives the power unit to obtain power from the AC / DC conversion unit through the first input terminal. When the output state of the AC / DC conversion unit is abnormal, the power management unit switches from the normal mode to the low-power mode and drives the power unit to obtain power from the battery pack through the second input terminal.

[0009] Optionally, the power management unit includes a microcontroller and a first signal acquisition module, the first signal acquisition module being connected to the microcontroller and the AC / DC conversion unit; the microcontroller obtains the output status of the AC / DC conversion unit through the first signal acquisition module, and drives the power management unit to switch between the normal mode and the low power mode.

[0010] Optionally, the first signal acquisition module includes a comparator, a first resistor, a second resistor, and a first power supply; wherein,

[0011] The non-inverting input of the comparator is connected to the output of the AC / DC conversion unit, the inverting input of the comparator is connected to the reference voltage, the output of the comparator is connected to the first end of the first resistor, the second end of the first resistor is connected to the first signal port of the microcontroller and the first end of the second resistor, and the second end of the second resistor is connected to the first power supply.

[0012] Optionally, when the AC / DC conversion unit is in a normal output state, if the output voltage of the AC / DC conversion unit is greater than the reference voltage, the comparator outputs a high-level electrical signal to the microcontroller; when the AC / DC conversion unit is in an abnormal output state, if the output voltage of the AC / DC conversion unit is less than the reference voltage, the comparator outputs a low-level electrical signal to the microcontroller.

[0013] Optionally, the intrinsically safe power supply box for mining also includes a communication unit, the input of which is connected to a host computer, and the output of which is connected to the second signal port of the microcontroller; the microcontroller also obtains the output status of the AC / DC conversion unit through the communication unit and drives the power management unit to switch between the normal mode and the low power mode.

[0014] Optionally, the electrical signal input to the second signal port of the microcontroller has a higher priority than the electrical signal input to the first signal port of the microcontroller.

[0015] Optionally, the output terminal of the intrinsically safe output unit is connected to the load; in the low-power mode, the power management unit also drives the intrinsically safe output unit through the power unit to cause the display module of the corresponding connected load to enter a sleep mode, and / or drives the intrinsically safe output unit to shut off the power supply input of the load under no-load operation.

[0016] Optionally, the power management unit further includes a second signal acquisition module, which is connected to the microcontroller and the battery pack. The microcontroller obtains the operating status of the battery pack through the second signal acquisition module, and the power management unit acquires the signal of the operating status of the battery pack in the low-power mode at a lower frequency than the power management unit acquires the signal of the operating status of the battery pack in the normal mode.

[0017] To achieve the above objectives, a second aspect of this application provides a mining power supply device, including the intrinsically safe mining power supply box described in any one of the above claims.

[0018] The intrinsically safe power supply box and power supply device for mining provided in this application have at least the following beneficial effects:

[0019] This application provides an intrinsically safe power supply box and power supply device for mining, including an AC / DC conversion unit, a battery pack, a power unit, a power management unit, and multiple intrinsically safe output units. The input terminal of the AC / DC conversion unit is connected to the main power grid, the output terminal of the AC / DC conversion unit is connected to the first input terminal of the power unit, the output terminal of the battery pack is connected to the second input terminal of the power unit, the output terminal of the power unit is connected to the intrinsically safe output units, and the control terminal of the power unit is connected to the power management unit. The power management unit can drive the power supply input path of the power unit to switch between the AC / DC conversion unit and the second input terminal, and in the event of an abnormal output state of the AC / DC conversion unit, drive the battery pack to supply power to the power unit, and drive the power unit to provide low-power output to the intrinsically safe output units. This application can reduce the cost and difficulty of power supply loop construction in existing technologies and improve the power supply duration of the intrinsically safe power supply box for mining.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the mining power supply box according to an embodiment of this application.

[0023] Figure 2 This is a circuit connection diagram of the first signal acquisition module according to an embodiment of this application. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0025] Intrinsically safe power supply boxes for mining are crucial electronic devices for safe underground operations. As backup power sources, they continue to supply power to intrinsically safe equipment such as sensors and cameras even when the main mine power grid fails. Powered by backup batteries, they ensure the operation of critical underground electrical equipment. Therefore, researching low-power consumption for the power supply loop units of intrinsically safe power supply boxes in mining to extend their power supply duration is of paramount importance.

[0026] Existing research on low-power supply loops typically focuses on low-power applications for load devices or low-power design of a specific detection circuit in the power supply unit to reduce the power consumption of the power supply loop. However, there is little research and control on low-power strategies for the power supply input devices of the power supply loop, such as intrinsically safe power supply boxes for mining applications.

[0027] Based on the above problems, this application provides an intrinsically safe power supply box for mining, which can actively switch to a low-power working mode when the main power grid of the mine fails, and ensure the operation of key electrical equipment underground, thereby increasing the power supply duration of the intrinsically safe power supply box.

[0028] According to the first aspect of this application, a mining intrinsically safe power supply box is provided, such as... Figure 1 As shown, the power supply box includes an AC / DC conversion unit, a battery pack, a power unit, a power management unit, and multiple intrinsically safe output units. The input terminal of the AC / DC conversion unit is connected to the main power grid, and the output terminal of the AC / DC conversion unit is connected to the first input terminal of the power unit. The output terminal of the battery pack is connected to the second input terminal of the power unit, the output terminal of the power unit is connected to the intrinsically safe output units, and the control terminal of the power unit is connected to the power management unit.

[0029] The power management unit is configured to switch the power supply input path of the power unit between the first input terminal and the second input terminal, and to drive the battery pack to supply power to the power unit in the event of an abnormal output state of the AC / DC conversion unit, and to drive the power unit to provide low-power output to the intrinsically safe output unit.

[0030] Understandably, since the power management unit is configured to switch the power supply input path of the power unit between the first input terminal and the second input terminal, the power management unit can choose between the battery pack and the AC / DC conversion unit as the power supply path for the power unit.

[0031] Therefore, when the output state of the AC / DC conversion unit is normal, the power management unit can drive the power unit to obtain the power required by the AC / DC conversion unit, and drive the power unit to output power normally to the intrinsically safe output unit.

[0032] Conversely, when the output state of the AC / DC conversion unit is abnormal, the power management unit can drive the power unit to obtain the power required by the battery pack and drive the power unit to output power to the intrinsically safe output unit in a low-power manner. This reduces the power consumption of the intrinsically safe output unit when the output state of the AC / DC conversion unit is abnormal, and improves the battery pack's operating time.

[0033] It should be noted that this application does not impose specific limitations on the specific examples of abnormal output status of the AC / DC conversion unit mentioned above, including but not limited to abnormal output of the AC / DC conversion unit caused by hardware or circuit failure of the AC / DC conversion unit itself, and abnormal output of the AC / DC conversion unit caused by power failure of the main power grid connected to the input terminal of the AC / DC conversion unit.

[0034] In addition, the aforementioned low-power output modification of the intrinsically safe power supply box can also reduce the difficulty and cost of modifying the common point loop in existing technologies.

[0035] In some embodiments, the power management unit operates in two modes: a normal mode and a low-power mode. In the normal mode, when the output of the AC / DC conversion unit is normal, the power management unit supplies power to the power unit through the first input terminal. Conversely, when the output of the AC / DC conversion unit is abnormal, the power management unit switches from the normal mode to the low-power mode, in which case the battery pack supplies power to the power unit through the second input terminal.

[0036] As an example, the power management unit may specifically include a microcontroller and a first signal acquisition module, wherein the first signal acquisition module is connected to the microcontroller and the AC / DC conversion unit.

[0037] Because the first signal acquisition module connects the microcontroller and the AC / DC conversion unit, the microcontroller can obtain the output status of the AC / DC conversion unit in real time through the first signal acquisition module. Therefore, based on the electrical signal acquired by the first signal acquisition module, the microcontroller can automatically identify the output status of the AC / DC conversion unit, and thus drive the power management unit to automatically switch between normal mode and low-power mode.

[0038] As an example, such as Figure 1 and Figure 2 As shown, the first signal acquisition module specifically includes a comparator U1, a first resistor R1, a second resistor R2, and a first power supply VCC1. The non-inverting input of comparator U1 is connected to the output of the AC / DC conversion unit, the inverting input of comparator U1 is connected to the reference voltage VREF, the output of comparator U1 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the first signal port of the microcontroller and the first end of the second resistor R2, and the second end of the second resistor R2 is connected to the first power supply VCC1.

[0039] When the AC / DC converter is in normal output mode, its output voltage will be greater than the reference voltage VREF, sending a high-level electrical signal to the microcontroller's first signal port. At this time, the microcontroller, based on the high-level electrical signal input to the output of comparator U1, will drive the power management unit to continue operating in normal mode.

[0040] Conversely, when the AC / DC conversion unit is in an abnormal output state, its output voltage will be lower than the reference voltage VREF, and the output of comparator U1 will output a low-level electrical signal to the first signal port of the microcontroller. At this time, based on the level of the electrical signal input to the output of comparator U1, the microcontroller will drive the power management unit to switch its operating mode from normal mode to low-power mode.

[0041] Since the output of the intrinsically safe output unit is connected to the load, in low-power mode, the power management unit can drive the intrinsically safe output unit through the power unit to put the corresponding connected load's display module into sleep mode, and / or drive the intrinsically safe output unit to shut off the power input of the unloaded load, thereby reducing the power consumption of the intrinsically safe output unit and its corresponding load, and increasing the battery pack's operating time. Specifically, the microcontroller collects the output current and output voltage of each intrinsically safe output unit to compare the rated output power of the load connected to each intrinsically safe output unit with the actual output power. When the actual output power of the load is significantly lower than the rated output power, it can be determined that the intrinsically safe output unit corresponding to that load is unloaded, and the microcontroller can then shut off the output of that intrinsically safe output unit, thereby reducing no-load losses.

[0042] In some embodiments, such as Figure 1 As shown, the intrinsically safe power supply box for mining also includes a communication unit. The input end of the communication unit is connected to the host computer, and the output end of the communication unit is connected to the second signal port of the microcontroller.

[0043] Because the microcontroller can also communicate with a host computer via a communication unit, the host computer can control the power management unit to switch between normal mode and low-power mode through the communication unit. When an abnormal output state of the AC / DC converter is anticipated, for example, if the main power grid is about to fail, the host computer can send the output state of the AC / DC converter to the microcontroller via the communication unit. The microcontroller then drives the power management unit to switch between normal mode and the low-power mode based on the output state of the AC / DC converter.

[0044] In other words, the intrinsically safe power supply box for mining provided in this application allows the power management unit's operating status control to include autonomous identification control and active reception control. Autonomous identification control involves the microcontroller automatically identifying the output status of the AC / DC conversion unit based on the electrical signals acquired by the first signal acquisition module, and then automatically switching the operating status of the power management unit. Active reception control involves the microcontroller passively receiving the output status of the AC / DC conversion unit based on electrical signals sent by the host computer through the communication unit, and then switching the operating status of the power management unit accordingly.

[0045] The electrical signal input through the second signal port of the microcontroller has a higher priority than the electrical signal input through the first signal port of the microcontroller.

[0046] In some embodiments, the power management unit further includes a second signal acquisition module, which is connected to the microcontroller and the battery pack.

[0047] By electrically connecting the microcontroller to the battery pack through the second signal acquisition module, the microcontroller can obtain the operating status of the battery pack through the second signal acquisition module, thereby ensuring safe monitoring of the battery pack status and improving the safety of battery pack use and operation.

[0048] When the power management unit needs to operate in low-power mode, the microcontroller can further reduce the frequency of signal acquisition of the battery pack's operating status without affecting battery management, thereby increasing the battery pack's energy consumption and extending the battery pack's operating time in low-power mode.

[0049] In some embodiments, in order to improve the working stability and applicability of the intrinsically safe power supply box for mining, a temporary load can be added or an unloaded intrinsically safe output unit can be enabled during a power outage, and a wake-up mechanism can be set up to wake up the main control system of the intrinsically safe power supply box for mining by priority or wireless communication or by a weak-up pin.

[0050] A second aspect of this application also provides a mining power supply device, which includes the intrinsically safe mining power supply box described in any of the above embodiments.

[0051] In summary, this application provides an intrinsically safe power supply box and power supply device for mining, including an AC / DC conversion unit, a battery pack, a power unit, a power management unit, and multiple intrinsically safe output units. The input terminal of the AC / DC conversion unit is connected to the main power grid, the output terminal of the AC / DC conversion unit is connected to the first input terminal of the power unit, the output terminal of the battery pack is connected to the second input terminal of the power unit, the output terminal of the power unit is connected to the intrinsically safe output units, and the control terminal of the power unit is connected to the power management unit. The power management unit can drive the power supply input path of the power unit to switch between the AC / DC conversion unit and the second input terminal, and in the event of an abnormal output state of the AC / DC conversion unit, drive the battery pack to supply power to the power unit, and drive the power unit to provide low-power output to the intrinsically safe output units. This application can reduce the cost and difficulty of power supply loop construction in the prior art and improve the power supply duration of the intrinsically safe power supply box for mining.

[0052] In the foregoing descriptions of the embodiments, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A mine-used intrinsically safe power supply box characterized by comprising: It includes an AC / DC conversion unit, a battery pack, a power unit, a power management unit, and multiple intrinsically safe output units; among which, The input terminal of the AC / DC conversion unit is connected to the main power grid, and the output terminal of the AC / DC conversion unit is connected to the first input terminal of the power unit; the output terminal of the battery pack is connected to the second input terminal of the power unit, the output terminal of the power unit is connected to the intrinsically safe output unit, and the control terminal of the power unit is connected to the power management unit. The power management unit is configured to drive the power supply input path of the power unit to switch between the first input terminal and the second input terminal, and to drive the power unit to obtain power from the battery pack and to drive the power unit to output power to the intrinsically safe output unit in the event of an abnormal output state of the AC / DC conversion unit. The power management unit includes a microcontroller and a first signal acquisition module. The first signal acquisition module is connected to the microcontroller and the AC / DC conversion unit. The microcontroller obtains the output status of the AC / DC conversion unit through the first signal acquisition module and drives the power management unit to switch between normal mode and low power mode.

2. The intrinsically safe power pack for mining as claimed in claim 1, characterized in that, The first signal acquisition module includes a comparator, a first resistor, a second resistor, and a first power supply; wherein, The non-inverting input of the comparator is connected to the output of the AC / DC conversion unit, the inverting input of the comparator is connected to the reference voltage, the output of the comparator is connected to the first end of the first resistor, the second end of the first resistor is connected to the first signal port of the microcontroller and the first end of the second resistor, and the second end of the second resistor is connected to the first power supply.

3. The intrinsically safe power pack for mining as claimed in claim 2, characterized in that, When the AC / DC conversion unit is in a normal output state, if the output voltage of the AC / DC conversion unit is greater than the reference voltage, the comparator outputs a high-level electrical signal to the microcontroller; when the AC / DC conversion unit is in an abnormal output state, if the output voltage of the AC / DC conversion unit is less than the reference voltage, the comparator outputs a low-level electrical signal to the microcontroller.

4. The intrinsically safe power pack for mining use according to claim 3, characterized in that, The intrinsically safe power supply box for mining also includes a communication unit. The input terminal of the communication unit is connected to a host computer, and the output terminal of the communication unit is connected to the second signal port of the microcontroller. The microcontroller also obtains the output status of the AC / DC conversion unit through the communication unit and drives the power management unit to switch between the normal mode and the low power mode.

5. The intrinsically safe power pack for mining as claimed in claim 4, characterized in that, The electrical signal input to the second signal port of the microcontroller has a higher priority than the electrical signal input to the first signal port of the microcontroller.

6. The intrinsically safe power pack for mining as claimed in claim 1, characterized by The output terminal of the intrinsically safe output unit is connected to the load; in the low power mode, the power management unit also drives the intrinsically safe output unit through the power unit to make the display module of the corresponding connected load enter a sleep mode, and / or drive the intrinsically safe output unit to turn off the power supply input of the load under no-load operation.

7. The intrinsically safe power pack for mining as claimed in claim 1, characterized by The power management unit further comprises a second signal acquisition module, which is connected with the microcontroller and the battery pack; the microcontroller acquires the running state of the battery pack through the second signal acquisition module, and the signal acquisition frequency of the running state of the battery pack in the low-power consumption mode is lower than that in the normal mode.

8. A mine power supply device characterized by comprising: The mine intrinsic safety power supply box comprises the mine intrinsic safety power supply box according to any one of claims 1-7.

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