Passive power supply circuit and power supply device

Abstract

The utility model provides a kind of passive power supply circuit and power supply equipment, it is related to the technical field of energy storage, energy storage module;Rear power supply module, including the first voltage monitoring submodule and linear voltage stabilizer of being connected, the input of the first voltage monitoring submodule is connected with the energy storage module;The output voltage of the energy storage module is lower than first threshold value when the microcontroller is in working condition, the microcontroller is in low power consumption state;The output voltage of the energy storage module is higher than first threshold value, the first voltage monitoring submodule outputs first level signal, the microcontroller receives the first level signal, and the microcontroller works normally. When the power supply voltage of energy storage module is too low by the embodiment provided by the utility model, the microcontroller is adjusted to low power consumption state, when the voltage of energy storage module recovers, the microcontroller resumes work, and the microcontroller is prevented from power failure.

Description

Technical Field

[0001] This utility model relates to the field of power supply management technology, and in particular to a passive power supply circuit and power supply equipment. Background Technology

[0002] In modern power systems, energy storage modules are being used more and more widely, playing an important role in stabilizing power supply, regulating grid load, and improving the utilization rate of renewable energy.

[0003] When the back-end load is in operation, the energy storage module supplies power to the back-end load. Because the back-end load is continuously using power, the voltage output by the energy storage unit will be too low, which will cause the microcontroller to lose power and become unable to work. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a passive power supply circuit and power supply equipment in order to solve the above problems.

[0005] In a first aspect, embodiments of the present invention provide a passive power supply circuit for supplying power to a microcontroller, comprising:

[0006] Energy storage module;

[0007] The back-end power supply module includes a first voltage monitoring submodule and a linear regulator connected to each other, and the input terminal of the first voltage monitoring submodule is connected to the energy storage module;

[0008] When the microcontroller is in operation, and the output voltage of the energy storage module is lower than the first threshold, the microcontroller is in a low-power state.

[0009] When the output voltage of the energy storage module is higher than the first threshold, the first voltage monitoring submodule outputs a first level signal, the microcontroller receives the first level signal, and the microcontroller operates normally.

[0010] Through the embodiments provided by this utility model, when the power supply voltage of the energy storage module is too low, the microcontroller is adjusted to a low power consumption state. When the voltage of the energy storage module recovers, the microcontroller resumes operation, preventing the microcontroller from losing power. This solves the technical problem in the prior art where the microcontroller cannot work when the voltage output by the energy storage module cannot meet the power requirements of the microcontroller while it is in operation.

[0011] One possible approach is to connect the first voltage monitoring submodule to the enable terminal of the linear regulator;

[0012] When the microcontroller is not in normal working state, if the output voltage of the energy storage module is higher than the first threshold, the output terminal of the first voltage monitoring submodule outputs a second level signal to drive the linear regulator to work, and the microcontroller to work.

[0013] One possible approach is that the first voltage monitoring submodule includes one of the following: a transistor, an IGBT, or a MOSFET.

[0014] One possible approach is to further include a front-end power supply module connected to the energy storage module, the front-end power supply module comprising a connected AC power supply coil and a rectifier.

[0015] One possible approach is to also include a voltage regulation and protection module, which is directly or indirectly connected to the energy storage module, and is used to release the voltage across the energy storage module when the voltage across the energy storage module is higher than a first threshold.

[0016] One possible approach is to use a Zener diode as the voltage regulator submodule.

[0017] The Zener diode has its anode connected to the output terminal of the rectifier. When the voltage across the energy storage module is higher than the first protection threshold, the Zener diode operates, and the rectifier stops supplying power to the energy storage module.

[0018] or

[0019] The positive terminal of the Zener diode is connected to the energy storage module through a voltage monitoring module, and is used to discharge the voltage across the energy storage module in response to the second level signal.

[0020] One possible approach is a voltage regulation and protection module, comprising: an optocoupler submodule and a second voltage monitoring submodule;

[0021] The input terminal of the second voltage monitoring submodule is connected to the energy storage module;

[0022] The output terminal of the second voltage monitoring submodule is connected to one end of the optocoupler submodule, and the other end of the optocoupler submodule is connected to the AC power supply coil;

[0023] When the voltage across the energy storage module is higher than the second threshold, the output of the second voltage monitoring submodule outputs a third level signal to drive the optocoupler submodule to adjust the output voltage of the AC power supply coil so that the rectifier stops charging the energy storage module.

[0024] One possible approach is that the second monitoring submodule includes one of the following: a transistor, an IGBT, or a MOSFET.

[0025] One possible approach is that the energy storage module includes one of the following: lithium battery, supercapacitor, lead-acid battery, sodium-sulfur battery, or flow battery.

[0026] Secondly, this utility model provides a power supply device, including the circuit described in the first aspect.

[0027] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 A passive power supply circuit structure diagram provided for an embodiment of this utility model;

[0031] Figure 2 Another passive power supply circuit structure diagram provided for an embodiment of this utility model;

[0032] Figures 3(a) and 3(b) are example diagrams of a passive power supply circuit provided by an embodiment of the present invention;

[0033] Figure 4 This is an example diagram of another passive power supply circuit provided for an embodiment of the present utility model. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] In modern power systems, energy storage modules are being used more and more widely, playing an important role in stabilizing power supply, regulating grid load, and improving the utilization rate of renewable energy.

[0036] When the energy storage module supplies power to the downstream load, if the voltage output by the energy storage module is too low, the linear regulator supplying power to the downstream load will not work. As a result, the energy storage capacitor will not be able to supply power to the downstream load, and the microcontroller will stop working.

[0037] Reference Figure 1 To address the aforementioned issues, this application provides a passive power supply circuit for supplying power to a microcontroller. Specifically, the circuit includes an energy storage module and a back-end power supply module. The back-end power supply module includes a first voltage monitoring submodule and a linear regulator connected to each other. The input terminal of the first voltage monitoring submodule is connected to the energy storage module.

[0038] When the microcontroller is in operation, it consumes power, causing the output voltage of the energy storage module to fall below the first threshold. To prevent the microcontroller from losing power, in this example, the microcontroller is in a low-power state when the output voltage of the energy storage module is below the first threshold.

[0039] When the output voltage of the energy storage module is higher than the first threshold, the first voltage monitoring submodule outputs a first level signal, the microcontroller receives the first level signal, and the microcontroller operates normally.

[0040] It should be noted that the first level signal is the signal output by the first voltage monitoring submodule that indicates that the current output voltage of the energy storage module has recovered. When the microcontroller receives the first level signal, it generates a control signal, which enables the microcontroller to work.

[0041] Through the embodiments provided by this utility model, when the power supply voltage of the energy storage module is too low, the microcontroller is adjusted to a low power consumption state. When the voltage of the energy storage module recovers, the microcontroller resumes operation, preventing the microcontroller from losing power. This solves the technical problem in the prior art where the microcontroller cannot work when the voltage output by the energy storage module cannot meet the power requirements of the microcontroller while it is in operation.

[0042] Continue to refer to Figure 1 In the embodiments provided by this utility model, in order to ensure that the energy storage module can supply power to the back-end load (i.e., the microcontroller) when the voltage of the energy storage module is higher than the first threshold, the first voltage monitoring submodule is connected to the enable terminal of the linear regulator.

[0043] When the microcontroller is not in normal working state, if the output voltage of the energy storage module is higher than the first threshold, the second level signal output by the first voltage monitoring submodule drives the linear regulator to work.

[0044] It should be noted that the second level signal is the signal output by the first voltage monitoring submodule used to drive the aforementioned linear regulator. The linear regulator operates when it receives the second level signal.

[0045] In the embodiments provided by this utility model, the first voltage monitoring submodule includes one of a transistor, an IGBT, and a MOSFET.

[0046] Specifically, when the output voltage of the energy storage module is lower than the first threshold, the first voltage monitoring submodule outputs a low-level signal;

[0047] When the output voltage of the energy storage module is higher than the first threshold, the first voltage monitoring submodule outputs a high-level signal.

[0048] Therefore, the voltage conduction threshold value of the first voltage monitoring submodule is the first threshold value.

[0049] In other words, in the embodiments provided by this utility model, both the first and second level signals are high-level signals output when the output voltage of the energy storage module is higher than the first threshold.

[0050] This enables the microcontroller to start.

[0051] Based on the foregoing embodiments, in the embodiments provided by this utility model, reference is made to... Figure 2 In order to supply power to the energy storage module, in the embodiments provided by this utility model, the passive power supply circuit further includes a front-end power supply module, which includes a connected AC power supply coil and a rectifier.

[0052] This allows power to be supplied to the energy storage module.

[0053] Based on the aforementioned embodiments, during the operation of the energy storage module, the voltage at its two ends may fluctuate for various reasons, or even exceed the safe range. This will not only affect the performance and lifespan of the energy storage module, but may also damage the connected equipment.

[0054] To prevent the voltage output by the energy storage module from being too high, in the embodiments provided in this application, the passive power supply circuit is also equipped with a voltage regulation and protection module for powering the back end. The voltage regulation and protection module is directly or indirectly connected to the energy storage module and is used to discharge the voltage across the energy storage module when the voltage across the energy storage module is higher than a first threshold.

[0055] In this way, when the voltage across the energy storage module is higher than the voltage regulation threshold, the linear regulator will work to regulate the voltage output by the energy storage module, preventing excessive voltage on the downstream load.

[0056] Referring to Figures 3(a) and 3(b), two specific embodiments will be provided below:

[0057] In the following two specific embodiments, the voltage regulator submodule is a Zener diode.

[0058] Referring to Figure 3(a), in this embodiment, the positive terminal of the Zener diode is connected to the output terminal of the rectifier. When the voltage across the energy storage module is higher than the first threshold, the Zener diode operates, and the rectifier stops supplying power to the energy storage module. The depressurization direction of the energy storage module is shown by the arrow.

[0059] Referring to Figure 3(b), in this example, the maximum operating voltage that the linear regulator can withstand is defined as the regulation threshold. In other words, when the voltage output by the supercapacitor is higher than the aforementioned regulation threshold, it is necessary to release the voltage.

[0060] In the embodiments provided by this utility model, when the voltage output by the supercapacitor is higher than the aforementioned voltage regulation threshold, it is necessary to drive the Zener diode. That is, when the input voltage of the first voltage monitoring submodule is the voltage regulation threshold, the output level signal is used to drive the Zener diode to work. Based on the above, the voltage conduction threshold of the first voltage monitoring submodule is the first threshold value. Based on this, the first threshold value is equal to the voltage regulation threshold.

[0061] In an embodiment of this utility model, the positive terminal of the Zener diode is connected to the energy storage module through a voltage monitoring module. As can be seen from the foregoing, when the voltage across the energy storage module is higher than the voltage regulation threshold, the voltage monitoring module outputs a second level signal, and the Zener diode receives and responds to the second level signal to discharge the voltage across the energy storage module.

[0062] Comparing the two examples in Figure 3(a) and Figure 3(b), the voltage relief capability of Figure (3)(b) is weaker than that of the example in Figure 3(a) due to the smaller output current of the first voltage monitoring submodule.

[0063] Reference Figure 4 In some examples, the voltage regulation and protection module and the back-end power supply module are controlled by two separate devices. In this example, the back-end power supply module includes a first voltage monitoring submodule and a linear regulator, and the voltage regulation and protection module includes an optocoupler submodule and a second voltage monitoring submodule.

[0064] In this example, the voltage regulation and protection module includes an optocoupler submodule and a second voltage monitoring submodule. The input terminal of the second voltage monitoring submodule is connected to the energy storage module, and one end of the output terminal of the second voltage monitoring submodule is connected to the optocoupler submodule. The other end of the optocoupler submodule is connected to the AC power supply coil.

[0065] When the voltage across the energy storage module is higher than the second threshold, the output of the second voltage monitoring submodule outputs a third level signal to drive the optocoupler submodule to adjust the output voltage of the AC power supply coil so that the rectifier stops charging the energy storage module.

[0066] In this example, the second monitoring submodule includes one of the following: a transistor, an IGBT, or a MOSFET.

[0067] In this embodiment, the second threshold is the threshold for the second monitoring submodule to be turned on.

[0068] In this way, when the voltage across the energy storage module is higher than the second threshold, the output voltage of the AC power supply coil can be adjusted using the optocoupler module to protect the back-end microcontroller.

[0069] Therefore, the second threshold value is the voltage conduction critical value of the second voltage monitoring submodule.

[0070] In the embodiments provided by this utility model, the energy storage module includes one of the following: lithium battery, supercapacitor, lead-acid battery, sodium-sulfur battery, and flow battery.

[0071] Based on the foregoing embodiments, this utility model provides a power supply device, including the passive power supply circuit provided in the foregoing embodiments.

[0072] In the description of the embodiments of this utility model, 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 the present utility model. In the embodiments of this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in the embodiments of this utility model, as well as the features of the different embodiments or examples.

[0073] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of embodiments of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0075] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A passive power supply circuit, characterized by, The passive power supply circuit is used to supply power to the microcontroller, including: Energy storage module; The back-end power supply module includes a first voltage monitoring submodule and a linear regulator connected to each other, and the input terminal of the first voltage monitoring submodule is connected to the energy storage module; When the microcontroller is in operation, and the output voltage of the energy storage module is lower than the first threshold, the microcontroller is in a low-power state. When the output voltage of the energy storage module is higher than the first threshold, the first voltage monitoring submodule outputs a first level signal, the microcontroller receives the first level signal, and the microcontroller operates normally.

2. The circuit of claim 1, wherein, The first voltage monitoring submodule is connected to the enable terminal of the linear regulator; When the microcontroller is not in normal working state, if the output voltage of the energy storage module is higher than the first threshold, the output terminal of the first voltage monitoring submodule outputs a second level signal to drive the linear regulator to work, and the microcontroller to work.

3. The circuit of claim 2, wherein, The first voltage monitoring submodule includes one of the following: a transistor, an IGBT, or a MOSFET.

4. The circuit according to any one of claims 1 to 3, characterized in that Also includes: A front-end power supply module connected to the energy storage module, the front-end power supply module comprising: a connected AC power supply coil and a rectifier.

5. The circuit of claim 4, wherein, It also includes a voltage regulation and protection module, which is directly or indirectly connected to the energy storage module, and is used to release the voltage across the energy storage module when the voltage across the energy storage module is higher than a first threshold.

6. The circuit of claim 5, wherein, The voltage regulator submodule is a Zener diode. The Zener diode has its anode connected to the output terminal of the rectifier. When the voltage across the energy storage module is higher than the first protection threshold, the Zener diode operates, and the rectifier stops supplying power to the energy storage module. or The positive terminal of the Zener diode is connected to the energy storage module through a voltage monitoring module, and is used to discharge the voltage across the energy storage module in response to the second level signal.

7. The circuit of claim 5, wherein, Voltage regulation and protection module: includes: optocoupler submodule and second voltage monitoring submodule; The input terminal of the second voltage monitoring submodule is connected to the energy storage module; The output terminal of the second voltage monitoring submodule is connected to one end of the optocoupler submodule, and the other end of the optocoupler submodule is connected to the AC power supply coil; When the voltage across the energy storage module is higher than the second threshold, the output of the second voltage monitoring submodule outputs a third level signal to drive the optocoupler submodule to adjust the output voltage of the AC power supply coil so that the rectifier stops charging the energy storage module.

8. The circuit of claim 7, wherein, The second monitoring submodule includes one of the following: a transistor, an IGBT, or a MOSFET.

9. The circuit of claim 4, wherein, The energy storage module includes one of the following: lithium battery, supercapacitor, lead-acid battery, sodium-sulfur battery, and flow battery.

10. A power supply device, characterized by comprising: Includes the circuit as described in any one of claims 1 to 9.

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