Direct-current voltage output circuit
By designing a DC voltage output circuit, the rectifier and boost module processes AC or DC voltage, solving the problem that the photovoltaic energy storage system cannot output DC voltage at different times, and realizing a stable DC voltage power supply.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUZHOU LIKRY NEW ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-16
AI Technical Summary
Existing DC photovoltaic energy storage systems cannot output DC voltage during certain periods, resulting in unstable power supply to electrical appliances.
A DC voltage output circuit is designed, including an AC voltage input module, a rectifier circuit, a boost module, a first circuit topology, a transformer, and a DC voltage output module. By rectifying and boosting AC or DC voltage, a stable DC voltage can be output at different times.
It achieves stable DC voltage output at different times, ensuring that the photovoltaic energy storage system can continuously supply power during the day and on cloudy or rainy days.
Smart Images
Figure CN224367738U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrical components, and in particular to DC voltage output circuits. Background Technology
[0002] As countries around the world increasingly focus on global climate change, a series of carbon emission plans, such as carbon peaking and carbon neutrality, are being implemented. Photovoltaic energy storage technology has seen unprecedented development. However, existing photovoltaic energy storage technologies suffer from limitations due to varying time periods. For example, during the daytime, when solar radiation is strong and DC input voltage is available, while at night or on cloudy days, when solar radiation is low, the photovoltaic energy storage system still needs to output DC voltage to power appliances. However, existing DC photovoltaic energy storage systems have the problem of not being able to output DC voltage during certain periods. Utility Model Content
[0003] This application primarily addresses the problem in existing DC photovoltaic energy storage systems where DC voltage output is unavailable during certain time periods. It provides a DC voltage output circuit capable of storing or supplying power during all time periods.
[0004] To solve the above-mentioned technical problems, this application provides a DC voltage output circuit, characterized in that the DC voltage output circuit includes,
[0005] An AC voltage input module and a rectifier circuit are provided. The AC voltage input module is connected to the rectifier circuit. The AC voltage input module is used to input AC voltage, and the rectifier circuit is used to convert the AC voltage input by the AC voltage input module into a first DC voltage.
[0006] A DC voltage input module, wherein the DC voltage input module is used to input a first DC voltage;
[0007] A boost module is connected to both the rectifier circuit and the DC voltage input module, and the boost module is used to increase the voltage value of the first DC voltage.
[0008] A first circuit topology, wherein the first circuit topology is connected to the boost module;
[0009] Transformers, each of which is connected to the first circuit topology;
[0010] A DC voltage output module, wherein the DC output voltage module is connected to the transformer.
[0011] In one embodiment, the DC voltage output circuit further includes,
[0012] A rectifier and filter module is connected to both the transformer and the DC voltage output module.
[0013] In one possible implementation, the first circuit topology includes,
[0014] The first circuit topology includes,
[0015] A first inductor and a first capacitor are arranged sequentially along the direction of flow of the first DC current. The boost module is connected to the first inductor through the first capacitor, and the first inductor is connected to the transformer.
[0016] The second capacitor has a first connection point and a second connection point. The first connection point of the second capacitor is connected to the transformer, and the second connection point of the second capacitor is connected to the boost module.
[0017] In one possible implementation, the first circuit topology further includes,
[0018] The first switching transistor has a first connection point and a second connection point. The first connection point of the first switching transistor is connected to the connection line between the boost module and the first capacitor, and the second connection point of the first switching transistor is connected to the connection line between the transformer and the second capacitor.
[0019] In one possible implementation, the first circuit topology further includes,
[0020] An active clamping circuit is connected to both the boost module and the first switching transistor.
[0021] In one embodiment, the active clamping circuit includes a first connection point and a second connection point. The first connection point of the active clamping circuit is connected to the boost module, and the second connection point of the active clamping circuit is connected to the first switching transistor.
[0022] In one possible implementation, the active clamping circuit includes,
[0023] A second switching transistor and a third capacitor are connected together. The second switching transistor is positioned close to the first switching transistor, and the third capacitor is positioned close to the boost module.
[0024] In one possible implementation, the DC voltage output module further includes,
[0025] A grounding line is provided, which is connected to the connection line between the second capacitor and the transformer.
[0026] In one possible implementation, the transformer includes,
[0027] The primary winding and the secondary winding are electrically isolated from each other by magnetic coupling. The primary winding is connected to the first inductor and the first capacitor, and the secondary winding is connected to the rectifier and filter module.
[0028] Compared to existing technologies, under conditions of strong solar radiation, a first DC voltage is generated by a solar panel. This first DC voltage sequentially passes through a boost module, a first circuit topology, a transformer, a rectifier and filter module, and a DC voltage output module to achieve a regulated output. Under conditions of weak solar radiation, an AC voltage is input to the rectifier circuit via an AC voltage input module. The rectifier circuit converts the AC voltage into the first DC voltage, which then sequentially passes through a boost module, the first circuit topology, a transformer, a rectifier and filter module, and a DC voltage output module to achieve a regulated output. Therefore, a regulated first DC voltage can be output at all times. Attached Figure Description
[0029] Appendix Figure 1 This is a block diagram of the DC voltage output circuit of this application;
[0030] Appendix Figure 2 This is a circuit diagram of the DC voltage output circuit of this application.
[0031] Explanation of the labels in the diagram:
[0032] 10. DC voltage output circuit;
[0033] 100. AC voltage input module;
[0034] 200. Rectifier circuit;
[0035] 300. DC voltage input module;
[0036] 400. Boost module;
[0037] 500, First circuit topology; 510, First capacitor; 520, First inductor; 530, Second capacitor; 540, First switching transistor; 550, Active clamping circuit; 551, Second switching transistor; 552, Third capacitor;
[0038] 600. Transformer; 610. Primary winding; 620. Secondary winding;
[0039] 700. DC voltage output module;
[0040] 800. Rectifier and filter module;
[0041] 900. Grounding line. Detailed Implementation
[0042] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0043] Existing DC photovoltaic energy storage systems have the problem of not being able to output DC voltage during certain periods.
[0044] Therefore, this application provides a DC voltage output circuit, wherein the DC voltage output circuit includes,
[0045] An AC voltage input module and a rectifier circuit are provided. The AC voltage input module is connected to the rectifier circuit. The AC voltage input module is used to input AC voltage, and the rectifier circuit is used to convert the AC voltage input by the AC voltage input module into a first DC voltage.
[0046] A DC voltage input module, wherein the DC voltage input module is used to input a first DC voltage;
[0047] A boost module is connected to both the rectifier circuit and the DC voltage input module, and the boost module is used to increase the voltage value of the first DC voltage.
[0048] A first circuit topology, wherein the first circuit topology is connected to the boost module;
[0049] Transformers, each of which is connected to the first circuit topology;
[0050] A DC voltage output module, wherein the DC output voltage module is connected to the transformer.
[0051] Example 1:
[0052] Photovoltaic energy storage is a technology that stores the electrical energy generated by a photovoltaic (PV) power generation system for further utilization. The power output of a PV system depends on the intensity of solar radiation; the stronger the solar radiation, the more energy the PV cells receive, and the higher the power output. Therefore, PV systems are more suitable for installation in areas with abundant sunlight. However, even with abundant sunlight, power output varies at different times of day. Furthermore, during the daytime, solar radiation is stronger, resulting in more energy being received by the PV cells. At night or on cloudy days, solar radiation is weaker or even negligible, leading to insufficient energy received by the PV cells to power the appliances. Existing PV systems are typically used in conjunction with DC output voltage. The PV system inputs DC voltage into a DC output circuit, which then stabilizes the DC voltage output. However, due to time-related limitations, existing PV systems sometimes lack sufficient DC voltage input to the output circuit, further hindering the effective and continuous output of DC voltage.
[0053] Appendix Figure 1 This is a block diagram of the DC voltage output circuit 10 of this application. Please refer to the attached diagram. Figure 1 As shown, the DC voltage output circuit 10 of this application includes a DC voltage input module 300. The DC voltage input module 300 is connected to the photovoltaic power generation system. When the solar radiation is strong, the first DC voltage generated by the photovoltaic power generation system is input to the DC voltage output circuit 10 through the DC voltage input module 300.
[0054] Please refer to the attached document. Figure 1 As shown, the DC voltage output circuit 10 of this application also includes an AC voltage input module 100 and a rectifier circuit 200. The AC voltage input module 100 of this application is connected to the power grid and the rectifier circuit 200 respectively. Thus, when the solar radiation is weak, the photovoltaic power generation system cannot generate electricity through radiation. However, the DC voltage output circuit 10 needs to provide DC voltage. Therefore, the AC power from the power grid is directly input into the DC voltage output through the AC power input module, and the AC power is adjusted to the first DC voltage through the rectifier circuit 200.
[0055] Please refer to the attached document. Figure 1 As shown, the DC voltage output circuit 10 of this application also includes a boost module 400, which is connected to the rectifier circuit 200 and the DC voltage input module 300 respectively. The boost module 400 is used to boost the voltage value of the first DC voltage.
[0056] Please refer to the attached document. Figure 1As shown, the DC voltage output circuit 10 of this application also includes a first circuit topology 500, which is connected to the boost module 400 to receive the first DC voltage from the boost module 400.
[0057] In one embodiment, the boost module 400 is composed of inductors.
[0058] Please refer to the attached document. Figure 1 As shown, the DC voltage output circuit 10 of this application also includes a transformer 600, which is connected to the first circuit topology 500 to receive the first DC voltage from the first circuit topology 500 and achieve regulated output after adjustment by the transformer 600.
[0059] Please refer to the attached document. Figure 1 As shown, the DC voltage output circuit 10 of this application also includes a rectifier and filter module 800 and a DC voltage output module 700. The rectifier and filter module 800 is connected to the transformer 600 and the DC voltage output module 700, respectively. The rectifier and filter module 800 is used to receive the first DC voltage from the transformer 600 and to smooth the first DC voltage. The filter unit in the rectifier and filter module 800 is generally composed of energy storage components such as capacitors and inductors. By utilizing the charging and discharging characteristics of capacitors and the current-resisting characteristics of inductors, the AC components in the first DC voltage are filtered out, making the output first DC voltage smoother and more stable to meet the power supply stability requirements of electronic devices.
[0060] Appendix Figure 2 This is the circuit diagram of the DC voltage output circuit 10 of this application. Please refer to the attached diagram. Figure 2 As shown, the first circuit topology 500 of this application includes a first capacitor 510 and a first inductor 520. The first capacitor 510 and the first inductor 520 are arranged sequentially along the flow direction of the first DC current. The boost module 400 is connected to the first capacitor 510 through the first inductor 520. The first capacitor 510 is connected to the transformer 600.
[0061] Please refer to the attached document. Figure 2 As shown, the first circuit topology 500 of this application also includes a second capacitor 530. The second capacitor 530 has a first connection point and a second connection point. The first connection point of the second capacitor 530 is connected to the transformer 600, and the second connection point of the second capacitor 530 is connected to the boost module 400.
[0062] Please refer to the attached document. Figure 2As shown, the first circuit topology 500 of this application also includes a first switching transistor 540. The first switching transistor 540 has a first connection point and a second connection point. The first connection point of the first switching transistor 540 is connected to the connection line between the boost module 400 and the first capacitor 510. The second connection point of the first switching transistor 540 is connected to the connection line between the transformer 600 and the second capacitor 530.
[0063] Please refer to the attached document. Figure 2 As shown, the first circuit topology 500 of this application further includes an active clamping circuit 550, which is connected to the boost module 400 and the first switching transistor 540. The active clamping circuit 550 further includes a first connection point and a second connection point. The first connection point of the active clamping circuit 550 is connected to the boost module 400, and the second connection point is connected to the first switching transistor 540. The active clamping circuit 550 is used to limit voltage spikes when the first switching transistor 540 is in a cutoff state, thereby protecting the circuit.
[0064] In one embodiment, the active clamping circuit 550 includes a second switch 551 and a third capacitor 552. The second switch 551 is connected to the third capacitor 552. The second switch 551 is located near the first switch 540, and the third capacitor 552 is located near the boost module 400.
[0065] Please refer to the attached document. Figure 2 As shown, the DC voltage output circuit 10 of this application also includes a grounding line 900, which is connected to the connection line between the second capacitor 530 and the transformer 600.
[0066] Please refer to the attached document. Figure 2 As shown, the transformer 600 of this application includes a primary winding 610 and a secondary winding 620. The primary winding 610 is electrically isolated from the secondary winding 620 by magnetic coupling. The primary winding 610 is connected to a first inductor and a second capacitor 530, and the secondary winding 620 is connected to a rectifier and filter module 800.
[0067] In practical use, when the photovoltaic power generation system is operating under strong sunlight, its power generation is sufficient. The system is connected to the DC voltage input module 300 to input the first DC voltage. The boost module 400 is connected to both the DC voltage input module 300 and the first switching transistor 540. The first switching transistor 540 is in the ON state, allowing the first DC voltage to be input from the boost module 400 to the first switching transistor 540. The first switching transistor 540 is connected to the second capacitor 530, which in turn is connected to the boost module 400, forming a circuit. The first DC voltage flows back from the second capacitor 530 to the boost module 400, thus activating the boost module 400 to boost the first DC voltage. Further, when the first switching transistor 540 switches from the ON state to the OFF state, the active clamping circuit 550 activates to limit voltage spikes. Next, the first DC current starts from the boost module 400 and passes through the first capacitor 510, the first inductor 520, the primary winding 610 and the second capacitor 530 in sequence to form a circuit. At this time, the primary winding 610 generates a magnetic field, and the secondary winding 620 generates an induced electromotive force, thereby generating a current in the secondary winding 620 to further realize the transfer of the first DC voltage from the primary winding 610 to the secondary winding 620. Finally, the first DC voltage is output by the DC voltage output module 700 after passing through the rectifier and filter module 800.
[0068] When sunlight is weak, the photovoltaic power generation system generates insufficient power to supply the subsequent DC voltage output circuit 10. The AC voltage input module 100 is connected to the grid, providing AC power to the DC voltage output circuit 10. The AC power is then sent to the rectifier circuit 200, which converts the AC voltage into a first DC voltage. The boost module 400 is connected to both the rectifier circuit 200 and the first switching transistor 540. The first switching transistor 540 is in the ON state, allowing the first DC voltage to be input from the boost module 400 to the first switching transistor 540. The first switching transistor 540 is connected to the second capacitor 530, which in turn is connected to the boost module 400, forming a loop. The first DC voltage flows back from the second capacitor 530 to the DC boost module 400, thus activating the boost module 400 to boost the first DC voltage. Further, the first switching transistor 540 switches from the ON state to the OFF state, at which point the active clamping circuit 550 activates to limit voltage spikes. Next, the first DC current starts from the boost module 400 and passes through the first capacitor 510, the first inductor 520, the primary winding 610 and the second capacitor 530 in sequence to form a circuit. At this time, the primary winding 610 generates a magnetic field, and the secondary winding 620 generates an induced electromotive force, thereby generating a current in the secondary winding 620 to further realize the transfer of the first DC voltage from the primary winding 610 to the secondary winding 620. Finally, the first DC voltage is output by the DC voltage output module 700 after passing through the rectifier and filter module 800.
[0069] 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 this application. 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 those different embodiments or examples.
[0070] 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, "a plurality of" means two or more, unless otherwise explicitly specified.
[0071] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A DC voltage output circuit, characterized in that, The DC voltage output circuit includes, An AC voltage input module and a rectifier circuit are provided. The AC voltage input module is connected to the rectifier circuit. The AC voltage input module is used to input AC voltage, and the rectifier circuit is used to convert the AC voltage input by the AC voltage input module into a first DC voltage. A DC voltage input module, wherein the DC voltage input module is used to input a first DC voltage; A boost module is connected to both the rectifier circuit and the DC voltage input module, and the boost module is used to increase the voltage value of the first DC voltage. A first circuit topology, wherein the first circuit topology is connected to the boost module; Transformers, each of which is connected to the first circuit topology; A DC voltage output module, wherein the DC output voltage module is connected to the transformer.
2. The DC voltage output circuit according to claim 1, characterized in that, The DC voltage output circuit also includes, A rectifier and filter module is connected to both the transformer and the DC voltage output module.
3. The DC voltage output circuit according to claim 2, characterized in that, The first circuit topology includes, A first inductor and a first capacitor are arranged sequentially along the direction of flow of the first DC current. The boost module is connected to the first inductor through the first capacitor, and the first inductor is connected to the transformer. The second capacitor has a first connection point and a second connection point. The first connection point of the second capacitor is connected to the transformer, and the second connection point of the second capacitor is connected to the boost module.
4. The DC voltage output circuit according to claim 3, characterized in that, The first circuit topology also includes, The first switching transistor has a first connection point and a second connection point. The first connection point of the first switching transistor is connected to the connection line between the boost module and the first capacitor, and the second connection point of the first switching transistor is connected to the connection line between the transformer and the second capacitor.
5. The DC voltage output circuit according to claim 4, characterized in that, The first circuit topology also includes, An active clamping circuit is connected to both the boost module and the first switching transistor.
6. The DC voltage output circuit according to claim 5, characterized in that, The active clamping circuit includes a first connection point and a second connection point. The first connection point of the active clamping circuit is connected to the boost module, and the second connection point of the active clamping circuit is connected to the first switching transistor.
7. The DC voltage output circuit according to claim 6, characterized in that, The active clamping circuit includes, A second switching transistor and a third capacitor are connected together. The second switching transistor is positioned close to the first switching transistor, and the third capacitor is positioned close to the boost module.
8. The DC voltage output circuit according to claim 5, 6, or 7, characterized in that, The DC voltage output module also includes, A grounding line is provided, which is connected to the connection line between the second capacitor and the transformer.
9. The DC voltage output circuit according to claim 5, 6, or 7, characterized in that, The transformer includes, The primary winding and the secondary winding are electrically isolated from each other by magnetic coupling. The primary winding is connected to the first inductor and the first capacitor, and the secondary winding is connected to the rectifier and filter module.