CN111313528A - Multifunctional power supply system and power supply equipment - Google Patents
Multifunctional power supply system and power supply equipment Download PDFInfo
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- CN111313528A CN111313528A CN202010169010.3A CN202010169010A CN111313528A CN 111313528 A CN111313528 A CN 111313528A CN 202010169010 A CN202010169010 A CN 202010169010A CN 111313528 A CN111313528 A CN 111313528A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 147
- 238000004146 energy storage Methods 0.000 claims description 10
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- 230000000295 complement effect Effects 0.000 claims description 3
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- 230000032683 aging Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a multifunctional power supply system, which comprises: the control input unit is connected with the first bidirectional conversion unit and the bypass control unit; the first interface unit is also connected with a first external device, and the second interface unit is also connected with a second external device; after the control input unit receives the working parameters and/or preset control parameters, corresponding control instructions are generated, and the direction and the magnitude of the output voltage of the first bidirectional conversion unit and the second bidirectional conversion unit are controlled based on the generated control instructions. The invention also discloses a power supply device using the power supply system; the power supply system can realize the function of supplying power to different types of equipment, and effectively reduces the power supply cost.
Description
Technical Field
The invention relates to the field of power supplies, in particular to a multifunctional power supply system and power supply equipment.
Background
Electric energy is a common and important energy source, and particularly, with the development of science and technology, the use field of electric energy is more and more extensive and more emphasized. Generally, in the electricity utilization process, the voltage or current used by different devices is different, and at this time, different power supply sources are needed to supply power to the devices, and in the actual use process, a series of processing needs to be performed on the input power source of the devices, so that the feasibility and the safety of electricity utilization are ensured.
However, in the process of using different power supplies to supply power to the equipment and processing the power supplies, more cost investment is obviously needed. Therefore, how to realize low-cost investment in the process of supplying power to equipment by using different power supply sources is a problem to be solved urgently in the prior art.
Disclosure of Invention
In view of this, the present invention provides a multifunctional power supply system and a power supply device, which are used to solve the problem of high cost caused by the need of supplying power to different devices in the prior art.
The specific technical scheme of the embodiment of the invention is as follows:
a multifunctional power supply system, comprising:
the control input unit is used for receiving working parameters and preset control parameters of a power supply system and generating corresponding control instructions based on the working parameters and/or the control parameters;
the first bidirectional conversion unit is connected with the control input unit and used for outputting a first voltage and changing the size and the flow direction of the first voltage based on the control instruction;
the second bidirectional conversion unit is connected with the first bidirectional conversion unit and used for outputting a second voltage and changing the size and the flow direction of the second voltage based on the control instruction;
the first external device comprises a first power module and a first power supply module, and the first external device comprises a load and/or a power supply;
the first interface unit is connected with the first bidirectional conversion unit and the first external device, and the first interface unit is used for outputting the first voltage to the first power utilization module or receiving a first output current output by the first power supply module and then transmitting the first output current to the first bidirectional conversion unit;
the second external equipment comprises a second thermoelectric module and a second power supply module, and the second external equipment comprises a load and/or a power supply;
the first interface unit is used for outputting the second voltage to the second photovoltaic module or receiving second output current output by the second power supply module and then transmitting the second output current to the first bidirectional conversion unit;
and the bypass control unit is connected with the first interface unit and the control input unit, and controls the working state of the first external equipment based on the control instruction, wherein the working state comprises online grid connection use and offline use.
Optionally, the power supply system includes at least one first bidirectional conversion unit, and the first bidirectional conversion unit supplies power to the first external device through the bypass control unit;
the power supply system comprises at least one second bidirectional conversion unit, and all the second bidirectional conversion units are connected in parallel and then are connected with the first bidirectional conversion unit through a bus;
the power supply system supplies power to the second external equipment through the first bidirectional conversion unit and the second bidirectional conversion unit so as to realize the circulating charge-discharge function.
Optionally, the first power module is an alternating current power consumption device, the first power supply module is configured to provide alternating current, and the alternating current sequentially passes through the first bidirectional conversion unit and the second bidirectional conversion unit to output a constant current and a constant voltage to the second external device, so as to implement a DC direct current power supply function.
Optionally, the second thermoelectric module is a dc power device, and the second power supply module is configured to provide dc power and output ac power to the first external device through the second bidirectional conversion unit and the first bidirectional conversion unit in sequence to supply power, so as to achieve an electric energy recovery function.
Optionally, the power supply system includes one or more second power supply modules, and each second power supply module is connected to a corresponding second bidirectional conversion unit;
the second power supply module sequentially passes through the second bidirectional conversion unit, the first bidirectional conversion unit and the bypass control unit to supply power to the first external device, so that the UPS function of the power supply system is realized.
Optionally, the power supply system further comprises: the charging unit is connected with the second interface unit;
the charging unit is used for charging the second power supply module to realize an energy storage function; and
and electric energy is transmitted to the first external equipment through the second bidirectional conversion unit, the first bidirectional conversion unit, the bypass control unit and the first interface unit in sequence so as to realize a photoelectric complementary function.
Optionally, the power supply system may implement at least two functions of a UPS function, an electronic load function, a cyclic charge-discharge function, an energy storage function, and an electric energy recovery function.
Optionally, the power supply system further comprises: the switch unit is connected with the first interface unit and the first external equipment;
the switch unit controls the connection state between the first external device and the first interface unit based on the control instruction, and the connection state comprises a conduction state and a cut-off state.
Optionally, the control input unit comprises a DSP controller.
A power supply apparatus comprising a multifunctional power supply system as described above.
The embodiment of the invention has the following beneficial effects:
after the multifunctional power supply system and the power supply equipment are adopted, the multifunctional power supply system comprises a control input unit, a first bidirectional conversion unit, a second bidirectional conversion unit, a first interface unit, a second interface unit and a bypass control unit, wherein the first bidirectional conversion unit is connected with the control input unit, and the second bidirectional conversion unit is connected with the first bidirectional conversion unit; the first interface unit is connected with the bypass control unit and first external equipment, and the first external equipment comprises a first power utilization module and a first power supply module; the second interface unit is connected with the second bidirectional conversion unit and second external equipment, and the second external equipment comprises a second dual-purpose electrical module and a second power supply module; the bypass control unit is connected with the first interface unit, the first bidirectional conversion unit and the control input unit.
In this embodiment, based on the working parameters and the preset control parameters, the entire power supply system is controlled by the control input unit, and the magnitude and direction of the voltage output by the first bidirectional conversion unit and/or the second bidirectional conversion unit are changed by the combination of the first bidirectional conversion unit and the second bidirectional conversion unit, that is, under the control instruction generated by the control input unit, the first interface unit is connected to the first external device, and the second interface unit is connected to the second external device. Therefore, the function of supplying power to a plurality of devices by only one power supply system is realized, and the power supply system is favorable for reducing the cost investment in the power supply process of different devices.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic structural diagram of a multifunctional power supply system according to an embodiment;
FIG. 2 is a block diagram illustration of a specific application of the multifunctional power supply system in one embodiment;
FIG. 3 is a schematic structural diagram of a multifunctional power supply system in another embodiment;
fig. 4 is a schematic structural diagram of the first external device in one embodiment;
fig. 5 is a schematic structural diagram of the second external device in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The problem that power supply cost is high due to the fact that different equipment supplies different voltages in the traditional technology is solved. In the embodiment, a multifunctional power supply system is particularly provided. The system can supply power for different devices only through one power supply system, on one hand, the versatility of the power supply system is realized, and on the other hand, the input of power supply cost can be reduced through the power supply system.
The multifunctional power supply system of this embodiment can realize the control to the input direction and the size of power, and external power source also can realize the power supply to the load through this multifunctional power supply system simultaneously, guarantees to input the voltage value or the current value of predetermineeing the size and supplies the load to use.
Specifically, as shown in fig. 1, the present embodiment provides a multifunctional power supply system 100, where the multifunctional power supply system 100 includes: a control input unit 101, a first bidirectional conversion unit 102, a second bidirectional conversion unit 103, a bypass control unit 104, a first interface unit 105, and a second interface unit 106.
The first bidirectional conversion unit 102 is connected with the control input unit 101 and the second bidirectional conversion unit 103; the first interface unit 105 is connected with the bypass control unit 104 and the first external device 200, and the first external device 200 includes a first power module and a first power supply module; the second interface unit 106 is connected to the second bidirectional conversion unit 103 and the second external device 300, and the second external device 300 includes a second electrical module and a second power supply module; the bypass control unit 104 is connected to the control input unit 101, the first bidirectional conversion unit 102, and the first interface unit 105.
Specifically, the control input unit 101 is configured to receive a working parameter and a preset control parameter of the power supply system, and generate a corresponding control instruction based on the working parameter and/or the control parameter; the control input unit 101 is implemented by an upper computer, such as a computer, an IPAD, a mobile phone, etc.; the operating parameter/control parameter refers to a parameter for controlling the operation of the power supply system 100 to perform a relevant action, such as a start control command, or an input control parameter of a supply current magnitude, a control parameter of a supply current direction, and the like of the power supply system 100.
In one embodiment, the control input unit 101 may implement a control operation through a DSP (Digital Signal Processor) controller. Specifically, based on the high accuracy and efficiency of the DSP chip, the control input unit 101 can achieve flexible control of the entire power supply system 100.
The first bidirectional conversion unit 102 is configured to output a first voltage, and change a magnitude and a flow direction of the first voltage based on a control instruction; or the energy output by the second bidirectional conversion unit 103 is converted into the first interface unit 105 and the first external device 200, so as to realize bidirectional conversion; similarly, the second bidirectional conversion unit 103 is configured to output a second voltage, and change the magnitude and the flow direction of the second voltage based on the control instruction; or the energy of the second external device 300 is converted into the first bidirectional conversion unit 102, so as to realize bidirectional conversion.
The first interface unit 105 is configured to output a first voltage to the first power module, or is configured to receive a first output current output by the first power module and transmit the first output current to the first bidirectional conversion unit 102; the second interface unit 106 is configured to output a second voltage to the second electrical module, or is configured to receive a second output current output by the second power supply module and transmit the second output current to the first bidirectional conversion unit 102; the bypass control unit 104 controls the working state of the first external device 200 based on the control instruction, and the working state includes on-line grid connection use and off-line grid connection use.
The operating state of the multifunctional power supply system 100 can be changed by controlling the input unit 101, so that power can be supplied to devices with different voltage requirements through the multifunctional power supply system 100, the application scene of the multifunctional power supply system 100 is expanded, and the functions of the multifunctional power supply system 100 are enriched.
The mutual energy conversion between the first external device 200 and the second external device 300 can be realized through the first bidirectional conversion unit 102 and the second bidirectional conversion unit 103; at this time, a multifunctional application, such as outputting a constant current and a constant voltage, acting as a UPS, etc., may be implemented by the power supply system 100.
The bypass control unit 104, the first interface unit 105, and the second interface unit 106 can apply the multifunctional power supply system 100 to different scenarios, for example, the second interface unit 106 can connect a plurality of battery packs to realize a function of charging the battery packs through the first external device 200.
In one embodiment, the multifunctional power supply system 100 includes at least one first bidirectional conversion unit 102, and the first bidirectional conversion unit 102 sequentially passes through the control input unit 101 and the bypass control unit 104 to supply power to the first external device 200. The first external device 200 includes a first power supply module and a first power module, and when at least one bidirectional conversion unit 102 is provided, the first power supply module and the first power module can be controlled to operate simultaneously, that is, each first bidirectional conversion unit 102 is individually connected to a unique first power supply module or a first power module; at this time, after the first power supply module outputs the first output current, the first output current sequentially passes through the corresponding first bidirectional conversion unit 102, the second bidirectional conversion unit 103 and the second interface unit 106 to supply power to the second photovoltaic module; on the contrary, a second output current may be output through the second power supply module, and the second output current sequentially passes through the second bidirectional conversion unit 103 and the first bidirectional conversion unit 102 corresponding to the first electrical module, and then supplies power to the first electrical module through the bypass control unit 104, so as to implement bidirectional control on the power supply system 100.
In one embodiment, the first power module is an ac powered device, and the first power module is a power device for providing ac power, such as mains power. After the first power supply module provides the alternating current, the alternating current sequentially passes through the first bidirectional conversion unit 102 and the second bidirectional conversion unit 103 to output a constant current and a constant voltage to the second external device 300, so as to realize the DC direct current power supply function.
Specifically, the first bidirectional conversion unit 102 of the present embodiment includes an AC/DC converter and a DC/AC converter, and the second bidirectional conversion unit 103 includes a DC/DC converter; if the first power supply module outputs the first output current, the first output current is alternating current, and the first output current is rectified by the AC/DC converter to obtain direct current, and then the second bidirectional conversion unit 103 outputs a constant current and a constant voltage based on a control instruction, and outputs the constant current and the constant voltage to the second electrical module through the second interface unit 106 to realize power supply.
On the contrary, if the second power supply module outputs the second output current, the second output current is a direct current, and the second output current passes through the DC/DC converter to obtain a direct current and transmit the direct current to the first bidirectional conversion unit 102, that is, the direct current passes through the DC/AC converter to obtain a corresponding alternating current, and then the first interface unit 105 supplies power to the first external device 200.
In one embodiment, the alternating current provided by the first power supply module sequentially outputs a constant current and a constant voltage from the first bidirectional conversion unit 102 and the second bidirectional conversion unit 103, so that the second power supply module is a dc power utilization device, and the second power supply module is configured to provide a dc power and sequentially outputs the ac power to the first external device 200 through the second bidirectional conversion unit 103 and the first bidirectional conversion unit 102 to realize the power recovery function.
Based on the above-mentioned bidirectional control function for the multifunctional power supply system 100, the multifunctional power supply system 100 is also provided with at least one second bidirectional conversion unit 103, wherein all the second bidirectional conversion units are connected in parallel, and the second bidirectional conversion unit 103 is connected in parallel and then connected with the first bidirectional conversion unit 102 through a bus.
Exemplarily, as shown in fig. 2, five second bidirectional conversion units 103, i.e., DC/DC bidirectional modules, which are DC/DC converters, are provided; each DC/DC bidirectional module is connected with a corresponding unique external device to realize different functions; such as solar charging, battery 1, battery 2, etc., as shown in fig. 2. Specifically, solar charging is used as a second power supply module, the battery pack 1 and the battery pack 2 can be used as the second power supply module and also can be used as a second electric module, wherein when the electric quantity of the battery pack 1 and/or the battery pack 2 is too low, the battery pack 1 and/or the battery pack 2 is used as the second electric module when charging operation is realized for the battery pack 1 and/or the battery pack 2 through the solar charging function.
Actually, the solar charging is realized by a solar battery, which may be specifically used as a charging unit, as shown in fig. 3, the charging unit 107 is connected to the second interface unit 106; in practical operation, the charging unit 107 is configured to charge the second power supply module to implement an energy storage function; and transmits the electric energy to the first external device 200 through the second bidirectional conversion unit 103, the first bidirectional conversion unit 102, the bypass control unit 104, and the first interface unit 105 in sequence, so as to implement the photoelectric complementary function.
Further, as shown in fig. 3, the multifunctional power supply system is provided with a switch unit 108; specifically, the switch unit 108 is connected to the first interface unit 105 and the first external device 200, and the switch unit 108 controls a connection state between the first external device 200 and the first interface unit 105 based on the control instruction, where the connection state includes an on state and an off state. Illustratively, the switch unit 108 may be implemented by a MOS transistor, a relay, or a triode, that is, the switch unit controls the connection and disconnection between the first external device 200 and the first interface unit 105.
In one embodiment, as shown in fig. 4, if the second external device 300 is a second power supply module 301, the power supply system 100 can implement a power supply operation through the second power supply module 301 connected to the second interface unit 106. Specifically, the second power supply module 301 provides a first output voltage, and the first output voltage outputs a constant current and a constant voltage after passing through the first bidirectional conversion unit 103, so as to supply power to a load; since the second bidirectional conversion unit 103 is a DC/DC converter, a voltage with a preset magnitude can be obtained after the first output voltage passes through the first bidirectional conversion unit 102, and is recorded as a first preset voltage, and the magnitude of the first preset voltage is determined according to the working parameter received by the input control unit 101.
In another embodiment, the power supply system 100 is provided with a plurality of the second power supply modules 301, and each of the second power supply modules 301 is connected to a corresponding second conversion unit 104 through the second interface unit 106.
For example, as shown in fig. 2, if the input control unit is a DSP controller, and the DSP controller is connected to the upper computer, and the first interface unit 105 inputs ac power, in practical application, working parameters such as working current can be input through the DSP controller, and the power supply system 100 starts to operate. Specifically, after the alternating current is rectified by the first bidirectional conversion unit 102, a constant voltage source is generated on the bus, and the constant voltage source is determined by working parameters set by the DSP controller, so as to control the second bidirectional conversion unit 103 to output currents with different magnitudes, and then output a constant current to supply power to the connected battery pack through the second interface unit 106.
In addition, since the first bidirectional conversion unit 102 includes an AC/DC converter and a DC/AC converter, and the first bidirectional conversion unit 103 includes a DC/DC converter, the set operating parameters can be received through the input unit 101, so as to control the DC/DC converter of the first bidirectional conversion unit 103 to be in a boost mode by controlling the input unit 101, thereby raising the bus voltage to enable the AC/DC converter of the first bidirectional conversion unit 102 to automatically switch to a grid-connected inverter mode, thereby implementing energy-saving discharge of the battery pack.
In an embodiment, since the battery power supply system 100 includes a plurality of first bidirectional conversion units 103, two battery packs, such as the battery pack 1 and the battery pack 2 in fig. 2, may be respectively connected by connecting the two first bidirectional conversion units 103, at this time, a set operating parameter is received by the input unit, so as to control the DC/DC converter of one of the first bidirectional conversion units 103 to be in the step-up mode and the other to be in the step-down mode by controlling the input unit 101, so that the two battery packs connected to the second interface unit 106 are charged and discharged one by one, which can effectively reduce the power of the ac input and improve the power conversion efficiency of the power supply system 100.
In other embodiments, the power supply system 100 can also provide power for two battery packs with different specifications through the first bidirectional conversion unit 103; or the control input unit 101 controls the voltage values input by the two or more first bidirectional conversion units 103 to be different, so as to realize that the voltage values of the second voltages output by the two or more second bidirectional conversion units 103 are different; moreover, the types and specifications of the battery packs connected to the second bidirectional conversion unit 103 may be different, so that the power supply system 100 may supply power to the device through the battery packs of different types and specifications.
In one embodiment, the Power Supply system 100 may also be used as a UPS (uninterruptible Power Supply). Specifically, when the first interface unit 105 has ac input, the off-grid output directly supplies power through the ac received by the first interface unit 105, and the control input unit 101 controls the input ac to charge the battery pack connected to the second interface unit 106 through the first bidirectional conversion unit 102 and the first bidirectional conversion unit 103, so as to store energy; when no current is input into the first interface unit 105, that is, when power is off, based on the first bidirectional conversion unit 102 and the first bidirectional conversion unit 103, the control input unit 101 may control the battery pack to output off-grid in an inversion manner, and at the same time, control the bypass control 104 to be turned off, so that the battery pack connected to the first bidirectional conversion unit 103 through the second interface unit 106 may directly supply power to the power supply device, thereby implementing a continuous power supply function of the power supply system 100.
In one embodiment, as shown in fig. 5, if the second external device 300 is a charging unit 302; the charging unit 302 is connected to the first bidirectional conversion unit 103 through a second interface unit. Specifically, the charging unit 302 may be a solar charging or a wind charging, and the battery pack is charged by the charging unit 302, that is, the second power supply module 301 may be charged by the charging unit 302.
Illustratively, solar charging is used as the charging unit 302, as shown in fig. 6, the second bidirectional switching unit is connected to the battery pack 1, the battery pack 2 and the solar charging device through the second interface unit 106, the solar charging device can be controlled by the control input unit 101 to charge the battery pack 1, so as to implement energy storage operation, and after the battery pack 1 is charged, the battery pack 1 or the battery pack 2 continues to output constant current and constant voltage through the first bidirectional switching unit 103 to supply power to a load, for example, the control input unit 101 controls the battery pack 1 or the battery pack 2 to implement an inverter grid-connected power generation function of the power supply system 100.
The power supply system 100 can be used as a power supply, for example, in practical applications, if a peak period of power consumption occurs, the power supply system can supply power to a load through the battery pack to compensate for circuit loss of the ac power input through the first interface unit 105; on the other hand, the energy storage function can be realized, and the versatility of the power supply system 100 is realized, for example, the battery pack 1 or the battery pack 2 is charged by solar charging.
In yet another embodiment, the power supply system 100 can achieve constant current and constant voltage output and energy-saving aging of the constant current and constant voltage input. Wherein, any working parameter is set through the input unit 101 to obtain a preset constant current and constant voltage output for a load to use; specifically, after receiving the first input voltage through the first interface unit 105, the first input voltage is rectified through the first bidirectional conversion unit 102 to output a first voltage, and the first voltage obtains a constant current and a constant voltage within any specification through the first bidirectional conversion unit 103 and is provided for a load connected to the second interface unit 106. Any working parameter is set through the input unit 101, so that the battery pack connected with the second interface unit 106 is boosted through the first bidirectional conversion unit 103, inverted, connected to the grid and output to the load for power supply through the first bidirectional conversion unit 102.
It should be noted that, in the present embodiment, the first bidirectional conversion unit 103 outputs a constant current and a constant voltage, and the magnitude of the output constant current and constant voltage can be controlled by the control input unit 101, so as to supply power to the electric devices with different voltage/current requirements through the power supply system 100.
To sum up, the power supply system 100 of the embodiment can directly access the first input voltage through the first interface unit 105, and then supply power to the device through the first bidirectional conversion unit 102 and the first bidirectional conversion unit 103, or provide the second input voltage through, for example, the second power supply module 301, and supply power to the load through the second interface unit 106 and the inverter grid-connected power generation, or through the first bidirectional conversion unit 103 and the first bidirectional conversion unit 102, so as to achieve the effects of saving energy and avoiding battery aging. Further, the power supply system 100 of the present embodiment may be used as an energy storage device, and on one hand, the first input voltage received by the first interface unit 105 is converted by the first bidirectional conversion unit 102 and the first bidirectional conversion unit 103 to charge the second power supply module 301 (i.e., a battery pack); on the other hand, the charging unit 302 may be connected to the first bidirectional conversion unit 103, such as charging the second power supply module 301 through solar charging, wind charging, and the like.
Therefore, the power supply system 100 of the embodiment can realize the functions of constant current and constant voltage output, energy storage, UPS, electric energy recovery, and the like, and realize the multifunctional property of the power supply system 100, which is favorable for the cost input of the battery in practical use.
Based on the same inventive concept, the embodiment of the invention provides a power supply device. In particular embodiments, the power supply device may be any electronic device, such as the UPS power source, energy storage device, and the like described above.
It should be noted that, in this embodiment, the implementation of the power supply device is consistent with the implementation idea of the power supply system, and the implementation principle is not described herein again, and specific reference may be made to corresponding contents in the power supply system.
After the power supply system and the power supply equipment are adopted, the system comprises a control input unit, a first bidirectional conversion unit, a second bidirectional conversion unit, a first interface unit, a second interface unit and a bypass control unit, wherein the first bidirectional conversion unit is connected with the control input unit, and the second bidirectional conversion unit is connected with the first bidirectional conversion unit; the first interface unit is connected with the bypass control unit and first external equipment, and the first external equipment comprises a first power utilization module and a first power supply module; the second interface unit is connected with the second bidirectional conversion unit and second external equipment, and the second external equipment comprises a second dual-purpose electrical module and a second power supply module; the bypass control unit is connected with the first interface unit, the first bidirectional conversion unit and the control input unit.
In this embodiment, based on the working parameters and the preset control parameters, the entire power supply system is controlled by the control input unit, and the magnitude and direction of the voltage output by the first bidirectional conversion unit and/or the second bidirectional conversion unit are changed by the combination of the first bidirectional conversion unit and the second bidirectional conversion unit, that is, under the control instruction generated by the control input unit, the first interface unit is connected to the first external device, and the second interface unit is connected to the second external device. Therefore, the function of supplying power to a plurality of devices by only one power supply system is realized, and the cost input in the process of supplying power to different devices is reduced.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A multifunctional power supply system, comprising:
the control input unit is used for receiving working parameters and preset control parameters of a power supply system and generating corresponding control instructions based on the working parameters and/or the control parameters;
the first bidirectional conversion unit is connected with the control input unit and used for outputting a first voltage and changing the size and the flow direction of the first voltage based on the control instruction;
the second bidirectional conversion unit is connected with the first bidirectional conversion unit and used for outputting a second voltage and changing the size and the flow direction of the second voltage based on the control instruction;
the first external device comprises a first power module and a first power supply module, and the first external device comprises a load and/or a power supply;
the first interface unit is connected with the first bidirectional conversion unit and the first external device, and the first interface unit is used for outputting the first voltage to the first power utilization module or receiving a first output current output by the first power supply module and then transmitting the first output current to the first bidirectional conversion unit;
the second external equipment comprises a second thermoelectric module and a second power supply module, and the second external equipment comprises a load and/or a power supply;
the first interface unit is used for outputting the second voltage to the second photovoltaic module or receiving second output current output by the second power supply module and then transmitting the second output current to the first bidirectional conversion unit;
and the bypass control unit is connected with the first interface unit and the control input unit, and controls the working state of the first external equipment based on the control instruction, wherein the working state comprises online grid connection use and offline use.
2. The multifunctional power supply system of claim 1, wherein said power supply system comprises at least one of said first bidirectional conversion unit, said first bidirectional conversion unit providing power to said first external device through said bypass control unit;
the power supply system comprises at least one second bidirectional conversion unit, and all the second bidirectional conversion units are connected in parallel and then are connected with the first bidirectional conversion unit through a bus;
the power supply system supplies power to the second external equipment through the first bidirectional conversion unit and the second bidirectional conversion unit so as to realize the circulating charge-discharge function.
3. The multifunctional power supply system as claimed in claim 2, wherein the first power module is an ac power device, the first power module is configured to provide ac power, and the ac power sequentially passes through the first bidirectional conversion unit and the second bidirectional conversion unit to output a constant current and a constant voltage to the second external device, so as to implement a DC power function.
4. The multifunctional power supply system as claimed in claim 3, wherein the second photovoltaic module is a dc power device, and the second power module is configured to provide dc power and output ac power to the first external device sequentially through the second bidirectional conversion unit and the first bidirectional conversion unit to achieve the function of recovering electric energy.
5. The multifunctional power supply system of claim 4, wherein said power supply system comprises one or more of said second power supply modules, each of said second power supply modules being connected to a corresponding one of said second bidirectional conversion units;
the second power supply module sequentially passes through the second bidirectional conversion unit, the first bidirectional conversion unit and the bypass control unit to supply power to the first external device, so that the UPS function of the power supply system is realized.
6. The multifunctional power supply system of claim 5, wherein said power supply system further comprises: the charging unit is connected with the second interface unit;
the charging unit is used for charging the second power supply module to realize an energy storage function; and
and electric energy is transmitted to the first external equipment through the second bidirectional conversion unit, the first bidirectional conversion unit, the bypass control unit and the first interface unit in sequence so as to realize a photoelectric complementary function.
7. The multifunctional power supply system of claim 6 wherein said power supply system is capable of performing at least two of a UPS function, an electronic load function, a cyclic charge-discharge function, an energy storage function, and an electrical energy recovery function.
8. The multifunctional power supply system of claim 1, wherein said power supply system further comprises: the switch unit is connected with the first interface unit and the first external equipment;
the switch unit controls the connection state between the first external device and the first interface unit based on the control instruction, and the connection state comprises a conduction state and a cut-off state.
9. A multifunctional power supply system as claimed in any one of claims 1 to 8, wherein said control input unit comprises a DSP controller.
10. A power supply device characterized by comprising the multifunctional power supply system of any one of the above claims 1 to 9.
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Effective date of registration: 20210305 Address after: 518000 607, building a, Lingnan chuanggu, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Jiang Jiagang Address before: 518000 607, building a, Lingnan chuanggu, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Applicant before: Jiang Jiagang Applicant before: Shenzhen smart new energy technology Co.,Ltd. |