Optical storage integrated machine system, power supply circuit and power supply circuit control method thereof

Abstract

The application discloses a kind of light storage integrated machine systems and its power supply circuit, power supply circuit control method, belong to light storage integrated machine system technical field, including: main control unit, power module, multiple controllable switches and multiple anti-reverse diodes, wherein: power module is integrated with at least four power supply input ports, respectively connected to DC bus, energy storage battery, photovoltaic cell array and AC power grid;Photovoltaic cell array, energy storage battery and DC bus are respectively connected to the matching power supply input port by a group of anti-reverse diodes and a group of controllable switches, AC power grid is connected to the matching power supply input port by a group of controllable switches and rectifier bridge;Main control unit is connected with all controllable switches, for detecting the state of each power supply input port, and based on the detection result control the on-off combination of multiple controllable switches.Solve the problem of large equipment volume, high cost, low energy efficiency caused by using multiple independent power modules in traditional scheme.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of light storage integrated machine system, and more particularly, relates to a light storage integrated machine system and a power supply circuit and a power supply circuit control method thereof. BACKGROUND

[0002] In the technical field of light storage integrated machine system, the power supply module as the core power supply unit of the system undertakes the important responsibility of providing stable and reliable power for the weak electronic system such as the control system, the communication module and the sensing detection unit. At present, the mainstream light storage integrated machine system usually adopts a 24V DC power supply module to supply power for the above-mentioned weak current part. However, the energy source of the system during startup and operation has multiple sources, which may come from different power supply units such as AC power grid, DC bus, photovoltaic cell array or energy storage battery.

[0003] In the prior art, in order to realize power taking from different power sources, a multiple independent power supply module parallel power supply architecture is usually adopted. Specifically, when the system needs to take power from the AC power grid or the DC bus side, an independent 24V power supply module needs to be configured; and when power needs to be taken from the energy storage battery side, due to the difference in voltage level and power supply characteristics, another independent 24V power supply module must be configured. This results in at least two or more independent 24V power supply modules being installed in a complete system.

[0004] This multiple module parallel power supply scheme has several obvious deficiencies in practical application: first, the use of multiple independent power supply modules significantly increases the material procurement cost and assembly and debugging cost of the system; second, multiple modules need to occupy more installation space, resulting in a large overall volume of the device, which is not compatible with the current technical development trend of high power density and compact layout of light storage devices; third, multiple power supply modules running simultaneously will generate additional standby power consumption, which negatively affects the overall energy efficiency of the system; in addition, the increase in the number of power supply modules also means an increase in potential failure points of the system, which poses a challenge to the long-term operation reliability of the device. SUMMARY

[0005] In order to solve the deficiencies in the prior art, the present application provides a light storage integrated machine system and a power supply circuit and a power supply circuit control method thereof.

[0006] The present application adopts the following technical solutions.

[0007] The first aspect of the present application provides a power supply circuit of a light storage integrated machine system, comprising:

[0008] a master control unit, a power supply module, a plurality of controllable switches and a plurality of anti-reverse diodes, wherein:

[0009] The power module is integrated with at least four power input ports connected to a DC bus, an energy storage battery, a photovoltaic cell array and an AC power grid respectively, for converting the power input into a fixed voltage to power the master control unit;

[0010] The photovoltaic cell array, the energy storage battery and the DC bus are connected to the matching power input port through a set of anti-reverse diodes and a set of controllable switches respectively, and the AC power grid is connected to the matching power input port through a set of controllable switches and a rectifier bridge, the controllable switch connected to the photovoltaic cell array is a normally open switch, and the controllable switches connected to the energy storage battery, the AC power grid and the DC bus are normally closed switches;

[0011] The photovoltaic cell array is connected to the DC bus through a photovoltaic DC / DC converter, the energy storage battery is connected to the DC bus through an energy storage DC / DC converter, and the AC power grid is connected to the DC bus through a DC / AC converter;

[0012] The master control unit is connected to all controllable switches for detecting the state of each power input port, first determining whether the system is in grid-connected or off-grid mode based on the voltage state of the grid power input port, and then controlling the on-off combination of the plurality of controllable switches based on the judgment result of whether the photovoltaic power input port voltage value reaches the power supply threshold to perform intelligent switching of the power input port. Optionally, the positive electrode of the energy storage battery is connected to the positive electrode end of the energy storage power input port of the power module in series through the first anti-reverse diode D1 and the first controllable switch K1;

[0013] The negative electrode of the energy storage battery is connected to the negative electrode end of the energy storage power input port of the power module in series through the second anti-reverse diode D2 and the second controllable switch K2.

[0014] Optionally, the positive electrode of the photovoltaic cell array is connected to the positive electrode end of the photovoltaic power input port of the power module through the third anti-reverse diode D3 and the third controllable switch K3;

[0015] The negative electrode of the photovoltaic cell array is connected to the negative electrode end of the photovoltaic power input port of the power module through the fourth anti-reverse diode D4 and the fourth controllable switch K4.

[0016] Optionally, the positive electrode of the DC bus is connected to the positive electrode end of the DC bus power input port of the power module through the fifth anti-reverse diode D5 and the fifth controllable switch K5;

[0017] The negative electrode of the DC bus is connected to the negative electrode end of the DC bus power input port of the power module through the sixth anti-reverse diode D6 and the sixth controllable switch K6.

[0018] Optionally, the alternating current power grid is connected to an input end of a rectifier bridge through a seventh controllable switch K7 and an eighth controllable switch K8, and an output end of the rectifier bridge is connected to a power grid power supply input port of the power module.

[0019] The second aspect of the present application provides a power supply circuit control method of a light storage integrated system, which is used for controlling the power supply circuit of the light storage integrated system of the first aspect of the present application, and comprises the following steps:

[0020] detecting whether the light storage integrated system is connected to an effective power grid;

[0021] if the light storage integrated system is connected to the effective power grid, starting in a grid-connected mode and supplying power to the power module through the power grid power supply input port, and if the light storage integrated system is not connected to the effective power grid, starting in an off-grid mode and supplying power to the power module through the energy storage power supply input port;

[0022] after the power module is powered on, outputting a fixed voltage to supply power to the master control unit;

[0023] after the master control unit is started, detecting a photovoltaic voltage value of the photovoltaic power supply input port and judging whether the photovoltaic voltage value reaches a power supply threshold value;

[0024] controlling the on-off combination of the plurality of controllable switches based on the judgment result to perform power supply input port switching, which comprises the following steps:

[0025] if the photovoltaic voltage value reaches the power supply threshold value, switching to the photovoltaic power supply input port, and if the photovoltaic voltage value does not reach the power supply threshold value, switching to the direct current bus power supply input port.

[0026] optionally, if the photovoltaic voltage value reaches the power supply threshold value, controlling the controllable switch connected to the photovoltaic cell array to be closed and simultaneously controlling the controllable switches connected to the energy storage battery, the direct current bus and the alternating current power grid to be opened;

[0027] if the photovoltaic voltage value does not reach the power supply threshold value, controlling the controllable switch connected to the direct current bus to be closed and simultaneously controlling the controllable switches connected to the energy storage battery, the photovoltaic cell array and the alternating current power grid to be opened.

[0028] The third aspect of the present application provides a light storage integrated system, which comprises the power supply circuit of the light storage integrated system of the first aspect of the present application.

[0029] The fourth aspect of the present application provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the computer program realizes the power supply circuit control method of the light storage integrated system of the second aspect of the present application when loaded into the processor.

[0030] The fifth aspect of the present application provides a computer readable storage medium, the computer readable storage medium stores a computer program, the computer program is executed by a processor to realize the power supply circuit control method of the optical storage integrated machine system according to the second aspect of the present application.

[0031] Compared with the prior art, the present application has at least the following beneficial effects:

[0032] 1、The present application realizes safe and reliable power taking from the DC bus, energy storage battery, photovoltaic cell array and AC power grid by integrating at least four power supply input ports and cooperating with the master control unit to intelligently control the on-off combination of multiple controllable switches, solving the problems of large equipment size, high cost and low energy efficiency caused by using multiple independent power modules in traditional solutions.

[0033] 2、The present application realizes anti-reverse connection protection of the energy storage battery circuit and precise control of circuit on-off by series connecting the first anti-reverse diode D1 and the second anti-reverse diode D2 and the first controllable switch K1 and the second controllable switch K2 in the energy storage battery power supply branch, improving power supply safety and reliability.

[0034] 3、The present application realizes isolation and on-demand access of the photovoltaic power supply by configuring the third anti-reverse diode D3 and the fourth anti-reverse diode D4 for the photovoltaic cell array power supply branch and adopting the normally open third controllable switch K3 and the fourth controllable switch K4, avoiding reverse influence on the system when the voltage is insufficient and improving power supply intelligence.

[0035] 4、The present application realizes fast and reliable switching of the stable DC bus as a backup power supply by setting the fifth anti-reverse diode D5 and the sixth anti-reverse diode D6 and the fifth controllable switch K5 and the sixth controllable switch K6 for the DC bus power supply branch, ensuring the continuous operation capability of the system when the main power supply fails.

[0036] 5、The present application realizes conversion and controllable access of AC to DC by using the seventh controllable switch K7 and the eighth controllable switch K8 in combination with the structure of the rectifier bridge to access the AC power grid, widening the input source of the power module and enhancing the applicability of the system.

[0037] 6、The present application realizes automation and intelligent selection of the power supply path by first determining the initial starting mode according to the grid state, then detecting the photovoltaic voltage value and controlling the switch combination based on this to switch the power supply input port, improving the overall energy utilization efficiency of the system.

[0038] 7、The application realizes clear and exclusive switching logic between power supply circuits by controlling the closing of specific controllable switch groups and the opening of all other switches, solves the conflict problem that may be caused by multiple power supply parallel, and ensures the stability of system operation.

[0039] 8、The application realizes the optimization of the whole machine power supply architecture by integrating the above-mentioned power supply circuit in the optical storage integrated machine system, significantly reduces the device volume, reduces the production cost, and improves the reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a power supply circuit schematic diagram of an optical storage integrated machine system according to an embodiment of the application;

[0041] Figure 2 is a power supply circuit control method grid-connected start flow chart of an optical storage integrated machine system according to an embodiment of the application;

[0042] Figure 3 is a power supply circuit control method off-grid start flow chart of an optical storage integrated machine system according to an embodiment of the application. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the application clearer, the technical scheme of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. The described embodiments are only a part of the embodiments of the application, not all the embodiments. All other embodiments obtained by those skilled in the art without creative labor based on the spirit of the application are within the protection scope of the application.

[0044] The application provides a power supply circuit of an optical storage integrated machine system in Embodiment 1, as shown in the figure, the circuit comprises: Figure 1

[0045] a master control unit, a power supply module, a plurality of controllable switches and a plurality of anti-reverse diodes, wherein:

[0046] The power supply module is integrated with at least four power supply input ports connected to a direct current bus, an energy storage battery, a photovoltaic cell array and an alternating current grid respectively, for converting the power supply input into a fixed voltage to supply power to the master control unit;

[0047] The photovoltaic cell array, the energy storage battery and the direct current bus are respectively connected to the matching power supply input port through a group of anti-reverse diodes and a group of controllable switches, the alternating current grid is connected to the matching power supply input port through a group of controllable switches and a rectifier bridge, the controllable switch connected to the photovoltaic cell array is a normally open switch, and the controllable switches connected to the energy storage battery, the alternating current grid and the direct current bus are normally closed switches.​

[0048] The photovoltaic cell array is connected with a direct current bus through a photovoltaic DC / DC converter, the energy storage battery is connected with the direct current bus through an energy storage DC / DC converter, and the alternating current power grid is connected with the direct current bus through a DC / AC converter.

[0049] The master control unit is connected with all the controllable switches, is used for detecting the state of each power supply input port, and controls the on-off combination of the plurality of controllable switches based on the detection result.

[0050] It should be noted that the application realizes intelligent selection of a single power module from multiple power sources by integrating at least four power supply input ports and cooperating with the design of controllable switches and anti-reverse diodes, and solves the problems of large size, high cost and low energy efficiency caused by traditional parallel multi-power modules.

[0051] Preferably, the plurality of controllable switches includes a first controllable switch K1, a second controllable switch K2, a third controllable switch K3, a fourth controllable switch K4, a fifth controllable switch K5, a sixth controllable switch K6, a seventh controllable switch K7 and an eighth controllable switch K8.

[0052] Preferably, the plurality of anti-reverse diodes includes a first anti-reverse diode D1, a second anti-reverse diode D2, a third anti-reverse diode D3, a fourth anti-reverse diode D4, a fifth anti-reverse diode D5 and a sixth anti-reverse diode D6.

[0053] Preferably, the first controllable switch K1, the second controllable switch K2, the fifth controllable switch K5, the sixth controllable switch K6, the seventh controllable switch K7 and the eighth controllable switch K8 mentioned above are normally closed type switches, and the third controllable switch K3 and the fourth controllable switch K4 are normally open type switches.

[0054] Preferably, the positive electrode of the energy storage battery is connected to the positive electrode end of the energy storage power supply input port of the power module in series through the first anti-reverse diode D1 and the first controllable switch K1.

[0055] The negative electrode of the energy storage battery is connected to the negative electrode end of the energy storage power supply input port of the power module in series through the second anti-reverse diode D2 and the second controllable switch K2.

[0056] Wherein, the direction of the first anti-reverse diode D1 is from the positive electrode of the energy storage battery to the positive electrode of the power module, and the direction of the second anti-reverse diode D2 is from the negative voltage line of the power module to the negative electrode of the energy storage battery.

[0057] It should be noted that the first anti-reverse diode D1, the second anti-reverse diode D2 and the first controllable switch K1, the second controllable switch K2 are arranged in the energy storage battery branch, which realizes the anti-reverse connection and controllable on-off of the energy storage battery power supply circuit, and improves the safety and reliability of the system.

[0058] Preferably, the positive pole of the photovoltaic cell array is connected to the positive pole end of the photovoltaic power supply input port of the power module through the third anti-reverse diode D3 and the third controllable switch K3.

[0059] The negative pole of the photovoltaic cell array is connected to the negative pole end of the photovoltaic power supply input port of the power module through the fourth anti-reverse diode D4 and the fourth controllable switch K4.

[0060] The third anti-reverse diode D3 is in the direction of the positive pole of the photovoltaic cell array to the positive pole of the power module, and the fourth anti-reverse diode D4 is in the direction of the negative voltage line of the power module to the negative pole of the photovoltaic cell array.

[0061] It should be noted that the third anti-reverse diode D3, the fourth anti-reverse diode D4, the third controllable switch K3 and the fourth controllable switch K4 are arranged in the photovoltaic cell array branch, and the normally open switch design is adopted, so that the intelligent access and isolation of the photovoltaic power supply are realized, and the influence of invalid photovoltaic input on the system is avoided.

[0062] Preferably, the positive pole of the DC bus is connected to the positive pole end of the DC bus power supply input port of the power module through the fifth anti-reverse diode D5 and the fifth controllable switch K5.

[0063] The negative pole of the DC bus is connected to the negative pole end of the DC bus power supply input port of the power module through the sixth anti-reverse diode D6 and the sixth controllable switch K6.

[0064] The fifth anti-reverse diode D5 is in the direction of the positive pole of the DC bus to the positive pole of the power module, and the sixth anti-reverse diode D6 is in the direction of the negative voltage line of the power module to the negative pole of the DC bus.

[0065] It should be noted that the fifth anti-reverse diode D5, the sixth anti-reverse diode D6, the fifth controllable switch K5 and the sixth controllable switch K6 are arranged in the DC bus branch, so that the reliable access and switching of the DC bus power supply are realized, and the power supply continuity of the system in the absence of photovoltaic or insufficient energy storage is improved.

[0066] Preferably, the AC power grid is connected to the input end of the rectifier bridge through the seventh controllable switch K7 and the eighth controllable switch K8, and the output end of the rectifier bridge is connected to the power grid power supply input port of the power module.

[0067] It should be noted that the seventh controllable switch K7 and the eighth controllable switch K8 cooperate with the rectifier bridge to realize the rectification and controllable access of the AC power grid, and ensure the stability and safety of the power grid power supply.

[0068] Preferably, the photovoltaic cell array is connected to the DC bus through a photovoltaic DC / DC converter, the energy storage battery is connected to the DC bus through an energy storage DC / DC converter, and the AC power grid is connected to the DC bus through a DC / AC converter.

[0069] Preferably, during the design of the power module, a capacitor with a large capacitance and withstand voltage is connected in parallel to the positive and negative voltage lines after the rectifier bridge to buffer voltage impact and fluctuations during switching.

[0070] The application provides a power supply circuit control method of a light storage integrated machine system in Embodiment 2, which is used for controlling the power supply circuit of the light storage integrated machine system in Embodiment 1, and includes the following steps:

[0071] Step 1: detecting whether the light storage integrated machine system is connected to an effective power grid, if yes, starting in a grid-connected mode, and supplying power to the power module through the power grid supply input port, and if not, starting in an off-grid mode, and supplying power to the power module through the energy storage supply input port.

[0072] Preferably, the effective power grid refers to an AC power grid meeting predetermined electrical standards.

[0073] Step 2: after the power module is powered, outputting a fixed voltage to supply power to the master control unit.

[0074] Preferably, the fixed voltage is the working voltage 24V of the master control unit.

[0075] Step 3: after the master control unit is started, detecting the photovoltaic voltage value of the photovoltaic supply input port, and judging whether the photovoltaic voltage value reaches a power supply threshold.

[0076] Step 4: controlling the on-off combination of the plurality of controllable switches based on the judgment result to perform supply input port switching, including:

[0077] If the photovoltaic voltage value reaches the power supply threshold, switching to the photovoltaic supply input port, and if the photovoltaic voltage value does not reach the power supply threshold, switching to the DC bus supply input port.

[0078] Preferably, in Step 4:

[0079] If the photovoltaic voltage value reaches the power supply threshold, the controllable switch connected to the photovoltaic cell array is controlled to be closed, and the controllable switches connected to the energy storage battery, the DC bus and the AC power grid are controlled to be opened;

[0080] If the photovoltaic voltage value does not reach the power supply threshold, the controllable switch connected to the DC bus is controlled to be closed, and the controllable switches connected to the energy storage battery, the photovoltaic cell array and the AC power grid are controlled to be opened.

[0081] Specifically, if the photovoltaic voltage value reaches the power supply threshold, the third controllable switch K3 and the fourth controllable switch K4 are controlled to be closed, and the first controllable switch K1, the second controllable switch K2, the fifth controllable switch K5, the sixth controllable switch K6, the seventh controllable switch K7 and the eighth controllable switch K8 are controlled to be disconnected.

[0082] If the photovoltaic voltage value does not reach the power supply threshold, the fifth controllable switch K5 and the sixth controllable switch K6 are controlled to be closed, and the first controllable switch K1, the second controllable switch K2, the third controllable switch K3, the fourth controllable switch K4, the seventh controllable switch K7 and the eighth controllable switch K8 are controlled to be disconnected.

[0083] It should be noted that the present application realizes rapid and accurate switching of the power supply path by specifically controlling the closing of K3, K4 or K5, K6 and the disconnection of the remaining switches, avoids conflicts and interference between multiple power supplies, and improves the operation stability of the system.

[0084] Preferably, the power supply threshold of the photovoltaic voltage value is set according to the type of the power supply, for example, if the power supply range of the power supply is 200V-400V, the photovoltaic voltage can be powered as long as it is within the power supply range of the power supply.

[0085] Preferably, when at least two power supply input ports simultaneously meet the power supply condition, the master control unit selects the optimal power supply input port through a power consumption optimization algorithm and performs the corresponding switching operation.

[0086] It should be noted that the present application realizes automatic optimization selection of the power supply path by detecting the grid state and intelligently selecting grid-connected or off-grid startup mode, and then judging whether to switch to photovoltaic or DC bus power supply according to the photovoltaic voltage, thereby improving the system energy efficiency and reliability.

[0087] Specifically, the power supply condition of each port is determined by the power supply module, and as long as the voltage of each power supply input port is within the power supply range of the power supply module, it can be powered. Generally, the process of selecting a power supply module will select a power supply module that contains the voltage range of each power supply input port.

[0088] Specifically, the grid-connected operation process is as shown in Figure 2 , which includes:

[0089] The AC voltage of the power grid is connected to the photovoltaic storage integrated system during the starting of the grid-connected operation, at this time, the power module is powered on, and the output 24V voltage is used to power the main control unit, after the main control unit is started and the entire photovoltaic storage integrated system is normally operated, the main control unit detects and judges the photovoltaic side voltage, if the photovoltaic side voltage meets the power supply requirement of the power module, the main control unit issues a control instruction to disconnect the first controllable switch K1, the second controllable switch K2, the fifth controllable switch K5, the sixth controllable switch K6, the seventh controllable switch K7 and the eighth controllable switch K8, and the third controllable switch K3 and the fourth controllable switch K4 are closed, at this time, the photovoltaic side supplies power to the power module.

[0090] If the main control unit determines that the photovoltaic side voltage does not meet the power supply requirement, the main control unit issues a control instruction to disconnect the first controllable switch K1, the second controllable switch K2, the third controllable switch K3, the fourth controllable switch K4, the seventh controllable switch K7 and the eighth controllable switch K8, and the fifth controllable switch K5 and the sixth controllable switch K6 are closed, at this time, the DC bus supplies power to the power module.

[0091] Specifically, the off-grid operation process is as shown in Figure 3 , including:

[0092] The DC voltage of the energy storage battery is input into the power module at the same time during the starting of the off-grid operation, after the power module is powered on, the power module outputs 24V voltage to power the main control unit, after the main control unit is started and the entire photovoltaic storage integrated system is normally operated, the main control unit detects and judges the photovoltaic side voltage, if the photovoltaic side voltage meets the power supply requirement of the power module, the main control unit issues a control instruction to disconnect the first controllable switch K1, the second controllable switch K2, the fifth controllable switch K5, the sixth controllable switch K6, the seventh controllable switch K7 and the eighth controllable switch K8, at this time, the photovoltaic side supplies power to the power module.

[0093] If the main control unit determines that the photovoltaic side voltage does not meet the power supply requirement, the main control unit issues a control instruction to disconnect the first controllable switch K1, the second controllable switch K2, the third controllable switch K3, the fourth controllable switch K4, the seventh controllable switch K7 and the eighth controllable switch K8, and the fifth controllable switch K5 and the sixth controllable switch K6 are closed, at this time, the DC bus supplies power to the power module.

[0094] In summary, the technical scheme provided by the present application is a kind of power module multi-port power supply circuit and intelligent control method for photovoltaic storage integrated system.The significant advantage of the scheme is that through innovative circuit design and control logic, a single power module can safely and efficiently take power from multiple power supply locations (such as power grid, DC bus, energy storage battery, photovoltaic array) of the system, and convert it into stable 24V voltage to power the weak current part of the system.

[0095] Specifically, the application can dynamically select the optimal power supply path under the intelligent decision of the master control unit by cooperating with the controllable switch group in series with the anti-reverse diode on each input branch of the power module. This not only ensures the reliability of power supply and the safety of the circuit, but more importantly, when multiple power supply input ports simultaneously have power supply capability, the system can automatically select the most power-saving and highest energy utilization power supply mode through the built-in power consumption optimization algorithm, thereby realizing the improvement of the overall energy efficiency of the system.

[0096] In an embodiment, when the photovoltaic storage all-in-one system is connected to an effective power grid and the output voltage of the photovoltaic cell array reaches a power supply threshold, the following steps are performed:

[0097] The system starts in grid-connected mode, and the AC grid voltage is connected to the grid power supply input port of the power module through the seventh controllable switch K7, the eighth controllable switch K8, and the rectifier bridge. The power module is powered and outputs a 24V voltage to supply power to the master control unit and other weak current parts of the entire system;

[0098] After the master control unit starts, the voltage value of the photovoltaic power supply input port, i.e., the output voltage of the photovoltaic cell array, is detected immediately;

[0099] The master control unit determines that the photovoltaic voltage value reaches the power supply threshold, and controls the third controllable switch K3 and the fourth controllable switch K4 to be closed, and the first controllable switch K1, the second controllable switch K2, the fifth controllable switch K5, the sixth controllable switch K6, the seventh controllable switch K7, and the eighth controllable switch K8 to be disconnected;

[0100] At this point, the power supply input source is switched from the grid to the photovoltaic cell array, and the photovoltaic electric energy supplies power to the power module through the third anti-reverse diode D3, the fourth anti-reverse diode D4, and the closed third controllable switch K3 and the fourth controllable switch K4.

[0101] In an embodiment, when the photovoltaic storage all-in-one system is connected to an effective power grid, but the output voltage of the photovoltaic cell array does not reach the power supply threshold, such as at night or on rainy days, the following steps are performed:

[0102] The system starts in grid-connected mode, and the AC grid voltage is connected to the grid power supply input port of the power module through the seventh controllable switch K7, the eighth controllable switch K8, and the rectifier bridge. The power module is powered and outputs a 24V voltage to supply power to the master control unit and other weak current parts of the entire system;

[0103] After the master control unit starts, the voltage value of the photovoltaic power supply input port is detected;

[0104] The master control unit judges that the photovoltaic voltage value does not reach the power supply threshold, controls the fifth controllable switch K5 and the sixth controllable switch K6 to be closed, and controls the first controllable switch K1, the second controllable switch K2, the third controllable switch K3, the fourth controllable switch K4, the seventh controllable switch K7 and the eighth controllable switch K8 to be disconnected.

[0105] At this point, the power supply input source is switched from the power grid to the DC bus, and the electrical energy of the DC bus supplies power to the power module through the fifth anti-reverse diode D5, the sixth anti-reverse diode D6 and the closed fifth controllable switch K5 and the sixth controllable switch K6.

[0106] It should be noted that the present application automatically switches to DC bus power supply when photovoltaic power generation is insufficient, and the DC bus energy may come from the power grid or energy storage backup, realizing smooth transition of power supply and high reliability operation of the system, and solving the problem of system power supply reliability caused by unstable photovoltaic.

[0107] In an embodiment, when the photovoltaic and energy storage integrated machine system is not connected to an effective power grid, and the output voltage of the photovoltaic cell array does not reach the power supply threshold, the following steps are performed:

[0108] The system starts in off-grid mode, and the DC voltage of the energy storage battery is connected to the energy storage power supply input port of the power module through the first anti-reverse diode D1, the second anti-reverse diode D2 and the first controllable switch K1 and the second controllable switch K2 in the normally closed state, and the power module is powered and supplies power to the master control unit;

[0109] After the master control unit is started, the voltage value of the photovoltaic power supply input port is detected;

[0110] The master control unit judges that the photovoltaic voltage value does not reach the power supply threshold, controls the fifth controllable switch K5 and the sixth controllable switch K6 to be closed, and controls the first controllable switch K1, the second controllable switch K2, the third controllable switch K3 and the fourth controllable switch K4 to be disconnected.

[0111] At this point, the power supply input source is switched from the energy storage battery to the DC bus. In off-grid mode, the electrical energy of the DC bus is usually maintained by the energy storage battery through the DC / DC converter, and this switching operation reduces the direct supply load of the energy storage battery, which may optimize the system efficiency.

[0112] It should be noted that the present application switches the power supply source of the power module from the energy storage battery direct supply to the DC bus when off-grid and photovoltaic is invalid, realizes centralized management of the energy storage battery energy through the DC / DC converter, may improve the overall efficiency of the system, and solves the technical problem of coordinated management of multiple energy sources in off-grid mode.

[0113] In an embodiment, when the photovoltaic and energy storage integrated machine system is not connected to an effective power grid, but the output voltage of the photovoltaic cell array reaches the power supply threshold, the following steps are performed:

[0114] The system starts in off-grid mode, and the DC voltage of the energy storage battery is connected to the energy storage power supply input port of the power module through the first anti-reverse diode D1, the second anti-reverse diode D2, and the first controllable switch K1 and the second controllable switch K2 in the normally closed state, and the power module is powered on and supplies power to the main control unit.

[0115] After the main control unit is started, the voltage value of the photovoltaic power supply input port is detected.

[0116] The main control unit determines that the photovoltaic voltage value reaches the power supply threshold, controls the third controllable switch K3 and the fourth controllable switch K4 to be closed, and the first controllable switch K1, the second controllable switch K2, the fifth controllable switch K5, and the sixth controllable switch K6 to be disconnected.

[0117] At this point, the power supply input source is switched from the energy storage battery to the photovoltaic cell array.

[0118] The photovoltaic power supplies power to the system, and at the same time, there is a margin to charge the energy storage battery through the DC bus, thereby saving the consumption of the energy storage battery.

[0119] It should be noted that the present application can quickly identify the effective photovoltaic when operating in off-grid mode and immediately switch, realizing the priority and full utilization of photovoltaic energy in off-grid state, prolonging the endurance time of the energy storage battery, and solving the problem of sustainable energy self-sufficiency of the off-grid system.

[0120] It should be particularly noted that the application of the present application is not limited to the above-mentioned light storage integrated system. Based on the design idea of multi-port input and intelligent selection, it is also applicable to other power electronic devices that require multiple power supply sources, such as photovoltaic inverters, energy storage converters, etc. As long as the device has multiple power supply sources to choose from, this scheme can provide an efficient and integrated power supply solution.

[0121] In addition, although the present application is described in detail with four power supply input ports as an example, those skilled in the art can understand that the number of power supply input ports of the power module can be expanded or reduced according to actual application requirements, for example, designed as 5, 6 or more. This flexibility enables the present application to adapt to various complex application scenarios.

[0122] Finally, through the above design and method, the present application effectively integrates multiple power supply input ports into one power module, replacing the design of multiple independent power modules in the traditional scheme, achieving the comprehensive effect of reducing the size of the device, reducing production cost, and improving energy utilization.

[0123] The present application provides a light storage integrated system in embodiment 3, which includes the power supply circuit of the light storage integrated system described in embodiment 1.

[0124] It should be noted that the application realizes high integration and intelligent management of the whole machine power supply structure by integrating the above power supply circuit in the optical storage integrated machine system, and significantly reduces the system volume and manufacturing cost.

[0125] The application provides an electronic device in embodiment 4, including a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program realizes the power supply circuit control method of the optical storage integrated machine system according to embodiment 2 when loaded to the processor.

[0126] The application provides a computer readable storage medium in embodiment 5, the computer readable storage medium stores a computer program, and the computer program realizes the power supply circuit control method of the optical storage integrated machine system according to embodiment 2 when executed by the processor.

[0127] The present disclosure can be a system, a method, and / or a computer program product. The computer program product can include a computer readable storage medium (or media) having computer readable program instructions thereon for causing a processor to carry out aspects of the present disclosure.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limit it, and although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A power supply circuit of a light storage all-in-one system, characterized by, Comprise: A master control unit, a power module, a plurality of controllable switches and a plurality of anti-reverse diodes, wherein: The power module is integrated with at least four power input ports connected to a DC bus, an energy storage battery, a photovoltaic cell array and an AC power grid respectively, for converting power input into a fixed voltage to power the master control unit; The photovoltaic cell array, the energy storage battery and the DC bus are respectively connected to the matching power input port through a set of anti-reverse diodes and a set of controllable switches, and the AC power grid is connected to the matching power input port through a set of controllable switches and a rectifier bridge, the controllable switch connected to the photovoltaic cell array is a normally open switch, and the controllable switch connected to the energy storage battery, the AC power grid and the DC bus is a normally closed switch; The photovoltaic cell array is connected to the DC bus through a photovoltaic DC / DC converter, the energy storage battery is connected to the DC bus through an energy storage DC / DC converter, and the AC power grid is connected to the DC bus through a DC / AC converter; The master control unit is connected with all controllable switches for detecting the state of each power input port, first judging whether the system is in grid-connected or off-grid mode based on the voltage state of the grid power input port, and then controlling the on-off combination of the plurality of controllable switches based on the judgment result of whether the photovoltaic power input port voltage value reaches the power supply threshold, to execute intelligent switching of the power input port.

2. The power supply circuit of the light storage integrated machine system according to claim 1, characterized in that: The positive electrode of the energy storage battery is connected to the positive electrode end of the energy storage power input port of the power module in series through the first anti-reverse diode D1 and the first controllable switch K1; The negative electrode of the energy storage battery is connected to the negative electrode end of the energy storage power input port of the power module in series through the second anti-reverse diode D2 and the second controllable switch K2.

3. The power supply circuit of the light storage integrated machine system according to claim 1, characterized in that: The positive electrode of the photovoltaic cell array is connected to the positive electrode end of the photovoltaic power input port of the power module through the third anti-reverse diode D3 and the third controllable switch K3; The negative electrode of the photovoltaic cell array is connected to the negative electrode end of the photovoltaic power input port of the power module through the fourth anti-reverse diode D4 and the fourth controllable switch K4.

4. The power supply circuit of the light storage integrated machine system according to claim 1, characterized in that: The positive electrode of the DC bus is connected to the positive electrode end of the DC bus power input port of the power module through the fifth anti-reverse diode D5 and the fifth controllable switch K5; The negative electrode of the DC bus is connected to the negative electrode end of the DC bus power input port of the power module through the sixth anti-reverse diode D6 and the sixth controllable switch K6.

5. The power supply circuit of the light storage integrated machine system according to claim 1, characterized in that: The AC power grid is connected to the input end of the rectifier bridge through the seventh controllable switch K7 and the eighth controllable switch K8, and the output end of the rectifier bridge is connected to the grid power input port of the power module.

6. A power supply circuit control method of a light-storage integrated system, used for controlling the power supply circuit of the light-storage integrated system according to any one of claims 1-5, characterized in that, Comprise: Detecting whether the light storage integrated machine system is connected to an effective power grid; If the effective power grid is accessed, the grid-connected mode is started, and the power grid supplies power to the power module through the power supply input port; if the effective power grid is not accessed, the off-grid mode is started, and the energy storage supplies power to the power module through the power supply input port; After the power module is powered on, a fixed voltage is output to supply power to the master control unit; After the master control unit is started, the photovoltaic voltage value of the photovoltaic power supply input port is detected, and it is judged whether the photovoltaic voltage value reaches the power supply threshold; Based on the judgment result, the on-off combination of the plurality of controllable switches is controlled, and the power supply input port switching is executed, including: If the photovoltaic voltage value reaches the power supply threshold, the photovoltaic power supply input port is switched; if the photovoltaic voltage value does not reach the power supply threshold, the DC bus power supply input port is switched.

7. The power supply circuit control method of the photovoltaic energy storage integrated system according to claim 6, characterized in that: If the photovoltaic voltage value reaches the power supply threshold, the controllable switch connected with the photovoltaic cell array is closed, and the controllable switch connected with the energy storage battery, the DC bus and the AC power grid is opened; If the photovoltaic voltage value does not reach the power supply threshold, the controllable switch connected with the DC bus is closed, and the controllable switch connected with the energy storage battery, the photovoltaic cell array and the AC power grid is opened.

8. A light storage integrated system, characterized by, The power supply circuit of the photovoltaic energy storage integrated system according to any one of claims 1-5.

9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The computer program is loaded into the processor to realize the power supply circuit control method of the photovoltaic energy storage integrated system according to claim 6 or 7.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program is executed by the processor to realize the power supply circuit control method of the photovoltaic energy storage integrated system according to claim 6 or 7.

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