Multi-source electric energy integration and absorption control device
By employing technologies such as full-wave rectification, LLC resonance, soft switching, and transformer step-up/step-down, the problem of low energy acquisition efficiency of energy storage devices under multi-source power input has been solved, achieving low-loss, high-efficiency power conversion and stable output.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-12
AI Technical Summary
Existing energy storage devices have low energy acquisition efficiency and high switching losses under multiple power inputs. Furthermore, the risk of overload is exacerbated when power surges in for a short period of time, and they cannot efficiently convert AC and DC mixed input power.
The device employs a multi-source power integration and absorption control system, which includes a full-wave rectifier, LLC resonant cavity, relay, transformer, and filter circuit. Through processes such as full-wave rectification, LLC resonance, soft switching, transformer step-up/step-down, and half-wave rectification, it initially unifies various power types into stable DC power, achieving low-loss and high-efficiency conversion.
It achieves low switching losses, a wide input power range, and high energy acquisition efficiency, and can simultaneously integrate multiple types of energy, thereby improving the energy acquisition capability and stability of energy storage devices.
Smart Images
Figure CN224233543U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of new energy power management, and in particular to a multi-source power integration and absorption control device. Background Technology
[0002] Driven by the "dual carbon" goal, the demand for new energy distribution and storage has surged. Energy storage equipment is a key component in the grid-side energy storage process, serving as the core connecting energy storage battery packs to the grid. It needs to cope with multiple sources of power input (photovoltaic, wind power, grid power, diesel power generation, etc.). The problems of power acquisition brought about by multiple sources of power input are emerging one after another. The power acquisition technology of energy storage equipment needs to be further enhanced and improved, and the problem of power acquisition urgently needs to be solved.
[0003] First, with the chaotic and disordered input of various types of electrical energy (such as low-voltage DC from photovoltaic power, fluctuating AC from wind power, and high-voltage mains power), the power management devices in traditional energy storage equipment typically employ hard-switching topologies (such as Buck-Boost circuits). The different characteristics of AC and DC power cause a surge in switching losses in mixed input scenarios (such as photovoltaic + mains power) due to input impedance mismatch. This leads to problems such as poor compatibility with different power types and high energy loss, making it impossible to efficiently convert the mixed AC and DC input power. Simultaneously, at certain specific times, a large influx of power occurs in a short period, far exceeding the instantaneous handling capacity of traditional power management devices. This exacerbates the risk of equipment overload, ultimately limiting the input voltage range and reducing the energy acquisition efficiency of the energy storage device.
[0004] Therefore, a new technology is urgently needed to solve the above problems. Utility Model Content
[0005] This invention aims to overcome the shortcomings of existing energy storage devices in terms of low energy acquisition efficiency when dealing with multiple power inputs, and provides a multi-source power integration and absorption control device with low switching losses, high acquisition efficiency, and a wide range of input power sources.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A multi-source power integration and absorption control device is positioned between the input of multi-source power and the direction of power to a battery storage group. It includes a device housing, a power receiving port, a full-wave rectifier, an LLC resonant cavity, a relay, a transformer, a half-wave rectifier, and a filter circuit. The power receiving port, full-wave rectifier, LLC resonant cavity, relay, transformer, half-wave rectifier, and filter circuit are all installed inside the device housing. The power receiving port includes several power receiving input ports and one power receiving output port. The power receiving output port is connected to the battery storage group. The power receiving input ports, full-wave rectifier, LLC resonant cavity, relay, transformer, and half-wave rectifier are connected sequentially. The half-wave rectifier is connected to the power receiving output port after passing through the filter circuit.
[0008] During operation, various types of electrical energy from different sources enter the full-wave rectifier through the power receiving input port for initial energy integration, converting the mixed AC and DC energy types into DC. Subsequently, the electrical energy flows from the full-wave rectifier through energized wires into the LLC resonant cavity, where the high-frequency resonance characteristics invert the DC into high-frequency AC. The high-frequency AC then flows through energized wires into a relay, which enables soft switching with zero loss. The AC then flows through the primary winding of the transformer, generating an alternating magnetic field through electromagnetic induction, inducing a voltage in the secondary winding, thus boosting (or buckling) the high-frequency AC. Next, the AC voltage from the transformer's secondary winding passes through a half-wave rectifier. Utilizing the unidirectional conductivity of the half-wave rectifier, the negative half-cycle of the high-frequency AC is filtered out (half-wave rectification) or reversed (full-wave rectification), outputting DC with a constant direction but fluctuating magnitude (including AC ripple), i.e., pulsating DC. This pulsating DC is then filtered by a filter circuit to remove ripple, resulting in a smooth, low-ripple, stable DC output. Finally, the smoothed DC is output through the power receiving port, completing the entire energy integration process. This invention can simultaneously acquire and integrate electrical energy from multiple sources and of different types, with a wide range of input power sources, strong integration capabilities, and high electrical energy acquisition efficiency.
[0009] Preferably, both the power receiving input port and the power receiving output port have a square cross-sectional shape. The inner side of the power receiving input port is plugged into and connected to the full-wave rectifier, and the inner side of the power receiving output port is plugged into and connected to the half-wave rectifier. The full-wave rectifier is provided with a full-wave rectifier input port and a full-wave rectifier output port. The full-wave rectifier input port is connected to the power receiving input port one by one, and the full-wave rectifier output port is connected to the LLC resonant cavity.
[0010] Preferably, the LLC resonant cavity includes a protective shell, an inductive resonant cavity, a resonant capacitor, and a switching transistor. The protective shell is internally insulated. The inductive resonant cavity is mounted on the protective shell. The input terminal of the inductive resonant cavity is connected to the full-wave rectifier output port. The output terminal of the inductive resonant cavity is connected to the input terminal of the resonant capacitor. The output terminal of the resonant capacitor is connected to a relay. The switching transistor is connected to the inductive resonant cavity. A resonant inductor coil is provided inside the inductive resonant cavity. An adjustment button is provided on the switching transistor. The resonant inductor coil is connected to the adjustment button.
[0011] Preferably, the relay has a base mounted on its bottom, and the relay is equipped with a stop button, a reset button, a function setting button, and a relay input port. The relay base is placed on the left and right sides of the protective shell. The output terminal of the resonant capacitor is connected to the relay input port. The function setting button includes an acceleration button, a deceleration button, and a constant speed button. The output terminal of the relay is connected to the transformer.
[0012] Preferably, the transformer is provided with an insulating shell, a primary winding and a secondary winding, both of which are located inside the insulating shell. The coil radius of the primary winding is larger than that of the secondary winding. The output terminal of the relay is connected to the primary winding, and the secondary winding is connected to the half-wave rectifier.
[0013] Preferably, the input terminal of the half-wave rectifier is connected to the secondary winding. The filter circuit includes a filter circuit base plate, a filter capacitor, a filter inductor, and a filter energizing straight wire. The filter circuit and the half-wave rectifier are directly connected via the filter energizing straight wire. The filter capacitor and the filter inductor are both mounted on the filter circuit base plate and are connected in series. The half-wave rectifier has a half-wave rectified output port, and the inner side of the power receiving output port is plugged into and plugged into the half-wave rectified output port of the half-wave rectifier.
[0014] Preferably, the housing of the device is made of insulating material.
[0015] The beneficial effects of this utility model are: low switching loss, ability to simultaneously acquire and integrate electrical energy from multiple sources and of different types, wide input power range, strong integration capability, and high electrical energy acquisition efficiency. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a top view of the present invention;
[0018] Figure 3 This is a partial explosion diagram of the present invention;
[0019] Figure 4 yes Figure 3 A schematic diagram of a partial explosion.
[0020] In the diagram: 1. Device housing; 2. Power receiving output port; 3. Power receiving input port; 4. Full-wave rectifier; 40. Full-wave rectifier input port; 5. Relay; 50. Stop button; 51. Relay base; 52. Function setting button; 53. Acceleration button; 530. Deceleration button; 531. Constant speed button; 532. Relay input port; 54. Half-wave rectifier; 6. Half-wave rectifier output port; 60. Transformer; 7. Secondary winding; 70. Insulating housing; 71. Primary winding; 72. Switching tube; 8. Adjustment button; 80. LLC resonant cavity; 9. Inductor resonant cavity; 90. Resonant inductor coil; 91. Resonant capacitor; 92. Protective housing; 10. Filter circuit; 100. Filter circuit base plate; 101. Filter capacitor; 102. Filter energized straight wire; 103. Filter inductor. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0022] like Figure 1 , Figure 2 , Figure 3 In the described embodiment, a multi-source power integration and absorption control device is positioned between the input of multi-source power and the direction of power to the energy storage battery pack. It includes a device housing 1, a power receiving port, a full-wave rectifier 4, an LLC resonant cavity 9, a relay 5, a transformer 7, a half-wave rectifier 6, and a filter circuit 10. The device housing 1 is made of insulating material. The power receiving port, full-wave rectifier 4, LLC resonant cavity 9, relay 5, transformer 7, half-wave rectifier 6, and filter circuit 10 are all installed inside the device housing 1. The power receiving port includes four power receiving input ports 3 and one power receiving output port 2. The power receiving input ports 3 accept various types of power from multiple sources (such as solar energy, DC power, wind power AC, AC mains power, etc.). The power receiving output port 2 is connected to the energy storage battery pack. The power receiving input ports 3, full-wave rectifier 4, LLC resonant cavity 9, relay 5, transformer 7, and half-wave rectifier 6 are connected sequentially. The half-wave rectifier 6 is connected to the power receiving output port 2 after passing through the filter circuit 10.
[0023] Both the power receiving input port 3 and the power receiving output port 2 have a square cross-sectional shape. The inner side of the power receiving input port 3 is plugged into the full-wave rectifier 4, and the inner side of the power receiving output port 2 is plugged into the half-wave rectifier 6. The full-wave rectifier 4 is equipped with a full-wave rectifier input port 40 and a full-wave rectifier output port. The full-wave rectifier input port 40 is connected to the power receiving input port 3, and the full-wave rectifier output port is connected to the LLC resonant cavity. Both the full-wave rectifier output port and the full-wave rectifier input port 40 use a direct-plug connection, which can be quickly plugged into the outside of the existing LLC resonant cavity 9, making installation very convenient.
[0024] The LLC resonant cavity 9 includes a protective shell 92, an inductive resonant cavity 90, a resonant capacitor 91, and a switching transistor 8. The protective shell 92 is internally insulated. The inductive resonant cavity 90 is mounted on the protective shell 92. The input terminal of the inductive resonant cavity 90 is connected to the full-wave rectifier output port, and the output terminal of the inductive resonant cavity 90 is connected to the input terminal of the resonant capacitor 91. The output terminal of the resonant capacitor 91 is connected to the relay 5. The switching transistor 8 is connected to the inductive resonant cavity 90. A resonant inductor coil 900 is located inside the inductive resonant cavity 90. An adjustment button 80 is located on the switching transistor 8, and the resonant inductor coil 900 is connected to the adjustment button 80. Figure 4 As shown. The inductor resonant cavity 90, through its energy storage and release characteristics, satisfies the zero-voltage switching characteristic of the switching transistor 8, ensuring that the voltage across the switching transistor 8 is zero, thus achieving soft switching with zero loss; at the same time, manual operation control can be achieved through the adjustment button 80.
[0025] A relay base 52 is mounted on the bottom of relay 5. Relay 5 has a stop button 50, a reset button 51, a function setting button 53, and a relay input port 54. The relay base 52 is located on the left and right sides of the protective housing 92. The output terminal of the resonant capacitor 91 is connected to the relay input port 54. The function setting button 53 includes an acceleration button 530, a deceleration button 531, and a constant speed button 532. The output terminal of relay 5 is connected to transformer 7. When the electrical energy is excessive, relay 5 activates the stop button 50 to cut off the circuit and protect the LLC resonant cavity 9 from overcurrent and overvoltage damage. After relay 5 activates its protection due to electrical energy overload, resetting button 51 is activated, and relay 5 returns to normal operation.
[0026] The transformer 7 is equipped with an insulating shell 71, a primary winding 72 and a secondary winding 70. Both the primary winding 72 and the secondary winding 70 are located inside the insulating shell 71. The coil radius of the primary winding 72 is larger than that of the secondary winding 70 to carry a larger input current. The output terminal of the relay 5 is connected to the primary winding 72, and the secondary winding 70 is connected to the half-wave rectifier 6.
[0027] The input terminal of the half-wave rectifier 6 is connected to the secondary winding 70. The filter circuit 10 is provided with a filter circuit base plate 100, a filter capacitor 101, a filter inductor 103, and a filter energizing straight wire 102. The filter circuit 10 and the half-wave rectifier 6 are directly connected through the filter energizing straight wire 102. The filter capacitor 101 and the filter inductor 103 are both mounted on the filter circuit base plate 100. The filter capacitor 101 and the filter inductor 103 are connected in series. The series connection of the filter capacitor 101 and the filter inductor 103 enhances the filtering effect and smooths the output DC power. The half-wave rectifier 6 is provided with a half-wave rectified output port 60. The inner side of the power receiving output port 2 is plugged into and plugged into the half-wave rectified output port 60 of the half-wave rectifier 6.
[0028] The input power supply voltage range that can be withstood is photovoltaic (DC 20-400V), wind power (AC 0-120V), mains power (AC 85-265V), and diesel generator (DC 24V / 48V).
[0029] During operation, various types of electrical energy from multiple sources enter the full-wave rectifier 4 through the power receiving input port 3 for initial integration, unifying the mixed AC and DC power types into DC power. Subsequently, the electrical energy flows from the full-wave rectifier 4 through the energized wires into the LLC resonant cavity 9, where the DC power is inverted into high-frequency AC power through high-frequency resonance characteristics. The high-frequency AC power then enters the relay 5 through the energized wires, enabling soft switching with zero loss. Afterward, it flows through the primary winding 72 of the transformer 7, generating an alternating magnetic field through electromagnetic induction, and the secondary winding 7... The transformer 7 induces a voltage to boost (or buck) the high-frequency AC power. Then, the AC voltage of the secondary winding 70 of the transformer 7 passes through the half-wave rectifier 6. Utilizing the unidirectional conductivity of the half-wave rectifier 6, the negative half-cycle of the high-frequency AC power is filtered out (half-wave rectification) or reversed (full-wave rectification), outputting DC power (containing AC ripple) with a constant direction and fluctuating magnitude, i.e., pulsating DC power. The pulsating DC power passes through the filter circuit 10 to filter out the ripple, smoothing out a stable DC power with low ripple. Finally, the smoothed DC power is output through the power receiving port to complete the entire integrated power process.
[0030] Although specific embodiments of the present invention are described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the present invention. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present invention.
Claims
1. A multi-source power integration and absorption control device, characterized in that, The device is positioned between the access to multiple power sources and the direction of power to the energy storage battery pack. It includes a device housing (1), a power receiving port, a full-wave rectifier (4), an LLC resonant cavity (9), a relay (5), a transformer (7), a half-wave rectifier (6), and a filter circuit (10). The power receiving port, the full-wave rectifier (4), the LLC resonant cavity (9), the relay (5), the transformer (7), the half-wave rectifier (6), and the filter circuit (10) are all installed inside the device housing (1). The power receiving port includes several power receiving input ports (3) and one power receiving output port (2). The power receiving output port (2) is connected to the energy storage battery pack. The power receiving input ports (3), the full-wave rectifier (4), the LLC resonant cavity (9), the relay (5), the transformer (7), and the half-wave rectifier (6) are connected in sequence. The half-wave rectifier (6) is connected to the power receiving output port (2) after passing through the filter circuit (10).
2. The multi-source power integration and absorption control device according to claim 1, characterized in that, The cross-sectional shape of the power receiving input port (3) and the power receiving output port (2) is square. The inner side of the power receiving input port (3) is plugged into the full-wave rectifier (4), and the inner side of the power receiving output port (2) is plugged into the half-wave rectifier (6). The full-wave rectifier (4) is provided with a full-wave rectifier input port (40) and a full-wave rectifier output port. The full-wave rectifier input port (40) is connected to the power receiving input port (3) one by one, and the full-wave rectifier output port is connected to the LLC resonant cavity.
3. The multi-source power integration and absorption control device according to claim 2, characterized in that, The LLC resonant cavity (9) is provided with a protective shell (92), an inductor resonant cavity (90), a resonant capacitor (91), and a switching transistor (8). The protective shell (92) is internally insulated. The inductor resonant cavity (90) is mounted on the protective shell (92). The input end of the inductor resonant cavity (90) is connected to the full-wave rectifier output port. The output end of the inductor resonant cavity (90) is connected to the input end of the resonant capacitor (91). The output end of the resonant capacitor (91) is connected to the relay (5). The switching transistor (8) is connected to the inductor resonant cavity (90). The inductor resonant cavity (90) is provided with a resonant inductor coil (900). The switching transistor (8) is provided with an adjustment button (80). The resonant inductor coil (900) is connected to the adjustment button (80).
4. The multi-source power integration and absorption control device according to claim 3, characterized in that, The relay (5) has a relay base (52) installed at its bottom. The relay (5) is equipped with a stop button (50), a reset button (51), a function setting button (53) and a relay input port (54). The relay base (52) is placed on the left and right sides of the protective shell (92). The output end of the resonant capacitor (91) is connected to the relay input port (54). The function setting button (53) includes an acceleration button (530), a deceleration button (531) and a constant speed button (532). The output end of the relay (5) is connected to the transformer (7).
5. The multi-source power integration and absorption control device according to claim 4, characterized in that, The transformer (7) is provided with an insulating shell (71), a primary winding (72) and a secondary winding (70). The primary winding (72) and the secondary winding (70) are both placed inside the insulating shell (71). The coil radius of the primary winding (72) is larger than that of the secondary winding (70). The output terminal of the relay (5) is connected to the primary winding (72), and the secondary winding (70) is connected to the half-wave rectifier (6).
6. The multi-source power integration and absorption control device according to claim 5, characterized in that, The input terminal of the half-wave rectifier (6) is connected to the secondary winding (70). The filter circuit (10) is provided with a filter circuit base plate (100), a filter capacitor (101), a filter inductor (103), and a filter energizing straight wire (102). The filter circuit (10) and the half-wave rectifier (6) are directly connected through the filter energizing straight wire (102). The filter capacitor (101) and the filter inductor (103) are both mounted on the filter circuit base plate (100). The filter capacitor (101) and the filter inductor (103) are connected in series. The half-wave rectifier (6) is provided with a half-wave rectified output port (60). The inner side of the power receiving output port (2) is plugged into and plugged into the half-wave rectified output port (60) of the half-wave rectifier (6).
7. The multi-source power integration and absorption control device according to claim 1, characterized in that, The outer casing (1) of the device is made of insulating material.