Multi-port inverter and energy storage power supply integrated system

Abstract

The invention relates to the technical field of energy storage power supplies, in particular to a multi-port inverter and energy storage power supply integrated system which comprises a parameter acquisition unit, a control unit and a first switch unit. The parameter acquisition unit acquires operation parameters of each electric device on the multi-port inverter and outputs a power electric signal to the control unit. The control unit compares the power of the equipment, if a power difference value exceeds a preset value and the voltage of certain equipment is lower than a threshold value, the equipment is judged to be insufficient in power supply, and a control signal is sent to the first switch unit. And the first switch unit immediately disconnects the main energy storage power supply and conducts the first standby energy storage power supply to ensure stable power supply of the affected equipment. The system can dynamically identify that when the multi-port inverter is connected to the high-power equipment and the low-power equipment at the same time, the low-power equipment of which the power supply is affected is determined, and the power supply reliability of the low-power equipment is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage power supply, and in particular to a multi-port inverter and energy storage power supply integrated system. Background Art

[0002] With the rapid development of renewable energy and distributed energy storage systems, integrated multi-port inverters and energy storage power supply systems have gained widespread application in microgrids, home energy management, and electric vehicle charging. These systems can simultaneously supply power to multiple devices and dynamically allocate power through intelligent control. However, in actual operation, when multiple devices are charged or powered by a multi-port inverter, interference between loads of different power levels often occurs.

[0003] In particular, when high-power and low-power devices are connected to different output terminals of a multi-port inverter, the high instantaneous power demand of the high-power device can cause fluctuations in the inverter's output voltage or current, negatively impacting the low-power device. For example, low-power devices (such as smart home devices and low-power sensors) are more sensitive to voltage stability and are prone to performance degradation, malfunctions, or even damage due to insufficient power or voltage drops. In contrast, high-power devices (such as electric vehicle charging stations and industrial motors) generally have stronger interference immunity, but they can still adversely affect low-power devices when multiple loads operate in conjunction. Summary of the Invention

[0004] The main purpose of the present invention is to provide a multi-port inverter and energy storage power supply integrated system, aiming to solve the technical problem in the prior art that when high-power equipment and low-power equipment are simultaneously connected to the multi-port inverter, the power supply of the low-power equipment is easily disturbed.

[0005] To achieve the above object, the present invention provides a multi-port inverter and energy storage power supply integrated system, the system comprising: a parameter acquisition unit, a control unit, a first switch unit; The parameter acquisition unit is connected to the control unit, the control unit is connected to the first switch unit, the first switch unit is connected to the main energy storage power supply, the first backup energy storage power supply and the multi-port inverter respectively, and the multi-port inverter is connected to the power-consuming device; The parameter acquisition unit is configured to collect operating parameters of a plurality of electric devices when the plurality of electric devices are connected to different ports of the multi-port inverter, and output power electrical signals of the plurality of electric devices to the control unit; The control unit is configured to compare the power of the plurality of electrical devices according to the power electrical signals corresponding to the plurality of electrical devices, and when the power difference between the electrical devices is greater than a preset power difference, determine that the electrical device whose operating voltage is lower than the normal operating voltage threshold is an insufficiently powered device, and output a corresponding control signal to the first switch unit; The first switch unit is used to conduct the power supply connection between the first backup energy storage power supply and the insufficiently powered device according to the control signal, and to disconnect the power supply connection between the main energy storage power supply and the insufficiently powered device.

[0006] Optionally, the system further includes a power switch button and a voltage conversion unit; The power switch button is connected to the first backup energy storage power supply and the voltage conversion unit respectively, and the voltage conversion unit is connected to the control unit; The power switch button is configured to, upon receiving a power switch instruction from a target electrical device, connect the first backup energy storage power supply to the voltage conversion unit so that the first backup energy storage power supply outputs a power voltage to the voltage conversion unit; The voltage conversion unit is used to convert the power supply voltage into the operating voltage of the control unit, so that the control unit controls the first switch unit to conduct the power supply connection between the first backup energy storage power supply and the target electrical equipment.

[0007] Optionally, the system further comprises: a power detection unit, a second switch unit; The power detection unit is connected to the first backup energy storage power supply and the control unit, and the second switch unit is connected to the control unit, the second backup energy storage power supply and the multi-port inverter; The power supply detection unit is configured to collect operating parameters of the first backup energy storage power supply and output the operating parameters to the control unit; The control unit is further configured to disconnect the power supply connection between the first backup energy storage power supply and the insufficiently powered device, and connect the power supply connection between the second backup energy storage power supply and the insufficiently powered device, when the operating parameters do not meet preset conditions.

[0008] Optionally, the system further includes: a status indicating unit: The state indicating unit is connected to the first switch unit and the second switch unit respectively; The state indicating unit is used to indicate the conduction state of the first switch unit or the second switch unit to display the energy supply state of the main energy storage power supply, the first backup energy storage power supply and the second backup energy storage power supply.

[0009] Optionally, the control unit is further configured to receive operating status data of a plurality of electrical devices from the parameter acquisition unit in real time, including power, current, voltage, usage frequency, operating time and fault record information; Determine the importance score, power demand score, usage frequency score within a preset time, cumulative operating time, and number of failures within a preset period for each electrical device based on the operating status data; The priority score of each electric device is determined based on the priority calculation formula, and the electric device with a priority score lower than the preset score threshold is determined as the target electric device, and the power supply connection between the first backup energy storage power supply and the target electric device is connected.

[0010] Optionally, the priority calculation formula is:

[0011] Where, Score the priority of electrical equipment. is the weight coefficient of importance score, Rate the importance, is the weighting factor for scoring power demand, Score the power demand, is the weight coefficient of frequency of use score, Score the frequency of use within a preset time period. is the weight coefficient of the cumulative running time, is the cumulative running time, is the weight coefficient of the number of failures within the preset period, is the number of faults within the preset period.

[0012] Optionally, the first switch unit includes: a first switch tube, a first diode and a magnetic switch; Wherein, the control end of the first switching tube is connected to the control unit, the input end of the first switching tube is connected to the positive pole of the first diode and one end of the magnetic switch coil, the output end of the first switching tube is grounded, the negative pole of the first diode is connected to the other end of the magnetic switch coil, the first end of the magnetic switch is connected to the multi-port inverter, the second end of the magnetic switch is connected to the main energy storage power supply, and the third end of the magnetic switch is connected to the first backup energy storage power supply.

[0013] Optionally, the first switch unit further includes: a first resistor, a second resistor, a first light emitting diode, a first photocoupler and a third resistor; Among them, the first end of the first resistor is connected to the power supply, the second end of the first resistor is connected to the anode of the first light-emitting diode, the cathode of the first light-emitting diode is connected to the first end of the first photoelectric coupler, the second end of the first photoelectric coupler is connected to the control unit, the third end of the first photoelectric coupler is connected to the second end of the second resistor, the first end of the second resistor is connected to the power supply, the fourth end of the first photoelectric coupler is connected to the first end of the third resistor and the control end of the first switching tube, and the second end of the third resistor is grounded.

[0014] Optionally, the second switch unit includes: a second switch tube, a third switch tube and a fourth resistor; Wherein, the first end of the fourth resistor is connected to the third end of the magnetic switch, the second end of the fourth resistor is connected to the output end of the second switching tube and the output end of the third switching tube, the input end of the third switching tube is connected to the first backup energy storage power supply, the control end of the third switching tube is connected to the control unit, the input end of the second switching tube is connected to the second backup energy storage power supply, and the control end of the second switching tube is connected to the control unit.

[0015] Optionally, the state indicating unit includes: a second light emitting diode, a fifth resistor, a third light emitting diode and a sixth resistor; Among them, the positive electrode of the second light-emitting diode is connected to the output end of the control unit for controlling the power supply circuit of the second backup energy storage power supply to be turned on, the negative electrode of the second light-emitting diode is connected to the first end of the fifth resistor, the second end of the fifth resistor is grounded, the positive electrode of the third light-emitting diode is connected to the output end of the control unit for controlling the power supply circuit of the first backup energy storage power supply to be turned on, the negative electrode of the third light-emitting diode is connected to the first end of the sixth resistor, and the second end of the sixth resistor is grounded.

[0016] The present invention provides a multi-port inverter and energy storage power supply integrated system, the system comprising: a parameter acquisition unit, a control unit, and a first switch unit; wherein the parameter acquisition unit is connected to the control unit, the control unit is connected to the first switch unit, the first switch unit is respectively connected to a main energy storage power supply, a first backup energy storage power supply, and a multi-port inverter, and the multi-port inverter is connected to an electrical device; the parameter acquisition unit is configured to collect operating parameters of multiple electrical devices when the multiple electrical devices are connected to different ports of the multi-port inverter, and output power electrical signals of the multiple electrical devices to the control unit; the control unit is configured to compare the power sizes of the multiple electrical devices based on the corresponding power electrical signals of the multiple electrical devices, and when the power difference between the electrical devices is greater than a preset power difference, determine that the electrical device whose operating voltage is lower than the normal operating voltage threshold is an insufficiently powered device, and output a corresponding control signal to the first switch unit; the first switch unit is configured to conduct the power connection between the first backup energy storage power supply and the insufficiently powered device and disconnect the power connection between the main energy storage power supply and the insufficiently powered device according to the control signal. The present invention can dynamically identify when a multi-port inverter is connected to a high-power device and a low-power device at the same time, determine the low-power device whose power supply is affected, and ensure the power supply reliability of the low-power device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a schematic structural diagram of a first embodiment of a multi-port inverter and energy storage power supply integrated system according to the present invention; Figure 2 2 is a schematic structural diagram of a second embodiment of a multi-port inverter and energy storage power supply integrated system according to the present invention; Figure 3 It is a circuit schematic diagram of the second embodiment of the multi-port inverter and energy storage power supply integrated system of the present invention.

[0018] Description of Figure Numbers:

[0019] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The embodiment of the present invention provides a multi-port inverter and energy storage power supply integrated system, referring to Figure 1 As shown, Figure 1 This is a structural block diagram of the first embodiment of the multi-port inverter and energy storage power supply integrated system of the present invention. The multi-port inverter and energy storage power supply integrated system of the present invention includes: a parameter acquisition unit 10, a control unit 20, and a first switch unit 30; The parameter acquisition unit 10 is connected to the control unit 20, the control unit 20 is connected to the first switch unit 30, the first switch unit 30 is respectively connected to the main energy storage power supply, the first backup energy storage power supply and the multi-port inverter, and the multi-port inverter is connected to the power consumption device; It should be understood that the primary energy storage power source provides the system's primary power supply and is typically a high-capacity battery pack or supercapacitor. The primary backup energy storage power source provides additional power when the primary energy storage power source cannot meet the power needs of certain electrical devices. For example, a home may have multiple electrical devices running simultaneously, such as air conditioners, refrigerators, and smart lights. When a high-power device (such as an air conditioner) starts up, the system automatically switches to the backup energy storage power source to ensure that low-power devices (such as smart lights) are not affected and maintain stable operation. The primary backup energy storage power source can be a small-capacity battery pack, supercapacitor, or other fast-response energy storage device. A multi-port inverter converts DC power into AC power, providing stable AC power to multiple electrical devices. A multi-port inverter has multiple output ports, each of which can be independently controlled to meet the needs of different electrical devices. Electrical devices connect to different ports of the multi-port inverter to receive and use the power provided by the inverter. Electrical devices include various types of electrical devices, such as smart home devices, electric vehicle charging stations, and industrial motors.

[0024] It should be noted that the parameter acquisition unit 10 is responsible for collecting the operating parameters of multiple electrical devices and converting these parameters into power electrical signals and outputting them to the control unit 20. This unit needs to have high-precision measurement capabilities to ensure that the collected data is accurate. The parameter acquisition unit 10 may include current sensors, voltage sensors, etc., which are used to monitor the current and voltage of each electrical device in real time, convert the analog signals collected by the sensors into digital signals, perform preliminary processing, and transmit the collected data to the control unit 20 via wired or wireless means. For example, Hall effect current sensors and voltage sensors can be used to collect current and voltage, and a microcontroller can be used in conjunction with an ADC for data collection and preliminary processing.

[0025] The control unit 20 is used to receive power electrical signals from the parameter acquisition unit 10 and compare the power levels of various electrical devices based on these signals. When it is detected that the operating voltage of a certain electrical device is lower than the normal operating voltage threshold, the device is determined to be an underpowered device, and a corresponding control signal is generated and sent to the first switch unit 30. The control unit 20 includes a microprocessor, a memory, an algorithm module, and a communication interface, wherein the microcontroller is used for data processing and logical judgment. The memory is used to store preset parameters such as power difference and normal operating voltage threshold. The algorithm module contains a comparison algorithm and control logic for analyzing the power electrical signals and generating control signals. The communication interface exchanges data with the parameter acquisition unit 10 and the first switch unit 30.

[0026] The first switch unit 30 is used to switch the power supply connection between the main energy storage power supply and the backup energy storage power supply according to the control signal generated by the control unit 20. When an insufficiently powered device is detected, the power supply connection between the backup energy storage power supply and the device is turned on, and the power supply connection between the main energy storage power supply and the device is disconnected. The first switch unit 30 may include a relay, a drive circuit, a protection circuit, and a communication interface, wherein the relay is used to switch the power connection and has the characteristics of fast response and high reliability. The drive circuit is used to drive the relay to ensure its correct operation. The protection circuit is used to prevent abnormal conditions such as overcurrent and overvoltage from causing damage to the system. The communication interface is used to receive control signals from the control unit 20.

[0027] Furthermore, the control unit 20 is further configured to receive operating status data of multiple electrical devices from the parameter acquisition unit 10 in real time, including power, current, voltage, usage frequency, operating time, and fault record information; Determine the importance score, power demand score, usage frequency score within a preset time, cumulative operating time, and number of failures within a preset period for each electrical device based on the operating status data; The priority score of each electric device is determined based on the priority calculation formula, and the electric device with a priority score lower than the preset score threshold is determined as the target electric device, and the power supply connection between the first backup energy storage power supply and the target electric device is connected.

[0028] The priority calculation formula is:

[0029] Where, Score the priority of electrical equipment. is the weight coefficient of importance score, Rate the importance, is the weighting factor for scoring power demand, Score the power demand, is the weight coefficient of frequency of use score, Score the frequency of use within a preset time period. is the weight coefficient of the cumulative running time, is the cumulative running time, is the weight coefficient of the number of failures within the preset period, is the number of faults within the preset period.

[0030] It should be noted that the control unit 20 can receive data from the parameter acquisition unit 10 via a communication interface. The received data is parsed into a structured format for subsequent processing. An importance score is determined for each electrical device based on the operating status data. The importance score can be preset based on factors such as device type and purpose. For example, a critical device (such as medical equipment or industrial control systems) is scored 10 points, while a common device (such as a lighting system) is scored 5 points. A power demand score is calculated based on the power demand of the electrical device. Generally, low-power devices have higher power demand scores. A usage frequency score is calculated based on the frequency of use of the electrical device within a preset time period. Frequently used devices receive a higher score. For example, a device used for less than one hour per day receives a score of 1 point, a device used for one to eight hours receives a score of 5 points, and a device used for more than eight hours receives a score of 10 points. The cumulative operating time of each electrical device is recorded to assess its service life and maintenance needs. The operating time of each device can be continuously recorded by a time recording module and stored in a database. A failure count score is calculated based on the number of failures a device experiences within a preset period. The higher the number of failures, the lower the score. For example, a device with no faults scores 10 points, a device with one fault scores 5 points, and a device with two or more faults scores 1 point. Based on the above scores, a priority score is calculated for each power consumer. The higher the priority score, the more important the device. Power consumers with priority scores below a preset score threshold are identified as target power consumers. The priority score of each device is compared with the threshold to determine the target power consumer. The power supply connection between the first backup energy storage power supply and the target power consumer is connected, and the power supply connection between the main energy storage power supply and the target power consumer is disconnected.

[0031] In this embodiment, a multi-port inverter and energy storage power supply integrated system is provided, the system comprising: a parameter acquisition unit 10, a control unit 20, and a first switch unit 30; wherein the parameter acquisition unit 10 is connected to the control unit 20, the control unit 20 is connected to the first switch unit 30, the first switch unit 30 is respectively connected to the main energy storage power supply, the first backup energy storage power supply and the multi-port inverter, and the multi-port inverter is connected to the power-consuming device; the parameter acquisition unit 10 is used to collect the operating parameters of the multiple power-consuming devices when the multiple power-consuming devices are connected to different ports of the multi-port inverter, and output the collected operating parameters to the multiple power-consuming devices. Output power electrical signals of multiple power-consuming devices to the control unit 20; the control unit 20 is used to compare the power sizes of multiple power-consuming devices based on the power electrical signals corresponding to the multiple power-consuming devices, and when the power difference between the power-consuming devices is greater than the preset power difference, determine that the power-consuming device whose operating voltage is lower than the normal operating voltage threshold is an insufficiently powered device, and output the corresponding control signal to the first switch unit 30; the first switch unit 30 is used to conduct the power supply connection between the first backup energy storage power supply and the insufficiently powered device according to the control signal, and disconnect the power supply connection between the main energy storage power supply and the insufficiently powered device. The present invention can dynamically identify when a multi-port inverter is connected to a high-power device and a low-power device at the same time, determine the low-power device whose power supply is affected, and ensure the power supply reliability of the low-power device.

[0032] Reference Figure 2 , Figure 2 It is a structural diagram of the second embodiment of the multi-port inverter and energy storage power supply integrated system of the present invention; based on the above-mentioned first embodiment, the second embodiment of the multi-port inverter and energy storage power supply integrated system of the present invention is proposed.

[0033] Furthermore, in this embodiment, the system further includes a power switch button K1 and a voltage conversion unit 40; The power switch button K1 is connected to the first backup energy storage power supply and the voltage conversion unit 40 respectively, and the voltage conversion unit 40 is connected to the control unit 20; The power switch button K1 is used to connect the first backup energy storage power supply to the voltage conversion unit 40 upon receiving a power switch instruction of the target electrical device, so that the first backup energy storage power supply outputs the power voltage to the voltage conversion unit 40; The voltage conversion unit 40 is used to convert the power supply voltage into the operating voltage of the control unit 20, so that the control unit 20 controls the first switch unit 30 to conduct the power supply connection between the first backup energy storage power supply and the target electrical equipment.

[0034] It should be noted that the power switch button K1 is used to manually trigger the power connection between the first backup energy storage power source and the voltage conversion unit 40. Upon receiving a power switch command from a target electrical device, the power switch button K1 establishes the power connection between the first backup energy storage power source and the voltage conversion unit 40, causing the first backup energy storage power source to output the power voltage to the voltage conversion unit 40. The power switch button K1 can be composed of a key switch, a control circuit, or an indicator light / display. The key switch can be a physical or electronic switch used to manually trigger the power switch. The control circuit can receive the key signal and control the operation of a relay or solid-state relay to switch the power connection. The indicator light / display is an optional component used to display the current power status. The voltage conversion unit 40 is used to convert the power voltage output by the first backup energy storage power source into the operating voltage of the control unit 20. This ensures the normal operation of the control unit 20 and controls the first switch unit 30 to establish the power connection between the first backup energy storage power source and the target electrical device. The voltage conversion unit 40 consists of a DC-DC converter, a filtering circuit, a protection circuit, and a communication interface. The DC-DC converter converts the input DC voltage into the required output voltage. The filter circuit is used to filter out ripple generated during the conversion process, ensuring a stable output voltage. The protection circuit prevents damage to the system from abnormal conditions such as overvoltage and overcurrent. The communication interface is used to exchange data with the control unit 20 and transmit voltage conversion status information. By introducing the power switch button K1 and the voltage conversion unit 40, the system not only automatically manages power switching but also provides the ability for manual intervention. Manual intervention takes precedence over automatic switching.

[0035] In this embodiment, optionally, the system further includes: a power detection unit 50, a second switch unit 60; The power detection unit 50 is connected to the first backup energy storage power supply and the control unit 20, and the second switch unit 60 is connected to the control unit 20, the second backup energy storage power supply and the multi-port inverter; The power detection unit 50 is used to collect operating parameters of the first backup energy storage power supply and output the operating parameters to the control unit 20; The control unit 20 is further configured to disconnect the power supply connection between the first backup energy storage power supply and the insufficiently powered device, and connect the power supply connection between the second backup energy storage power supply and the insufficiently powered device, when the operating parameters do not meet preset conditions.

[0036] It should be noted that the power detection unit 50 is used to collect operating parameters of the first backup energy storage power source and output these parameters to the control unit 20. These operating parameters include, but are not limited to, voltage, current, remaining capacity (SOC), and temperature, and are used to assess the status of the first backup energy storage power source. The power detection unit 50 may include voltage sensors, current sensors, temperature sensors, and other sensors to monitor various parameters of the first backup energy storage power source in real time. The analog signals collected by the sensors are converted into digital signals and initially processed. The collected data is then transmitted to the control unit 20 via wired or wireless means. For example, Hall effect current sensors and voltage sensors can be used to collect current and voltage. The temperature sensor can be a thermistor or thermocouple. The data acquisition module can utilize a microcontroller in conjunction with an ADC for data collection and initial processing. The second switching unit 60 switches the power supply connection between the first and second backup energy storage power sources based on a control signal generated by the control unit 20. If the operating parameters of the first backup energy storage power source do not meet preset conditions, the power supply connection between the second backup energy storage power source and the insufficiently powered device is established, while the power supply connection between the first backup energy storage power source and the device is disconnected. The second switching unit 60 may consist of a relay, a drive circuit, a protection circuit, and a communication interface. The relay is used to switch the power connection and features fast response and high reliability. The drive circuit drives the relay / solid-state relay to ensure its correct operation. The protection circuit prevents damage to the system due to abnormal conditions such as overcurrent and overvoltage. The communication interface receives control signals from the control unit 20.

[0037] The system effectively manages the power supply needs of different devices. If the primary backup energy storage power source fails, the system automatically switches to the secondary backup energy storage power source, ensuring a stable power supply to critical equipment (such as the PLC control system) and avoiding production interruptions. By introducing the power detection unit 50 and the second switch unit 60, the system can more flexibly manage and switch between backup energy storage power sources, ensuring a stable power supply to power-consuming devices in all circumstances. This multi-level redundancy design not only improves system reliability but also enhances its fault response capabilities.

[0038] Furthermore, the system further comprises: a status indicating unit 70: The state indicating unit 70 is connected to the first switch unit 30 and the second switch unit 60 respectively; The state indicating unit 70 is used to indicate the conduction state of the first switch unit 30 or the second switch unit 60 to display the power supply state of the main energy storage power supply, the first backup energy storage power supply and the second backup energy storage power supply.

[0039] It should be noted that the status indicator unit 70 is used to display the conduction status of the first switch unit 30 and the second switch unit 60, thereby indicating the power supply status of the main energy storage power supply, the first backup energy storage power supply, and the second backup energy storage power supply. The status indicator unit 70 uses visual or audio signals to allow users to intuitively understand the current power supply status of the system. By introducing the status indicator unit 70, the system can intuitively display the power supply status of each power supply, improving the system's operability and maintainability. Users can quickly understand the current power supply status through the indicator light or display, making it easier to take timely measures to ensure stable system operation.

[0040] Optionally, refer to Figure 3 In this embodiment, the first switch unit 30 includes: a first switch tube Q1, a first diode D1 and a magnetic switch KA; Among them, the control end of the first switching tube Q1 is connected to the control unit 20, the input end of the first switching tube Q1 is connected to the positive pole of the first diode D1 and one end of the magnetic switch coil, the output end of the first switching tube Q1 is grounded, the negative pole of the first diode D1 is connected to the other end of the magnetic switch coil, the first end of the magnetic switch KA is connected to the multi-port inverter, the second end of the magnetic switch KA is connected to the main energy storage power supply, and the third end of the magnetic switch KA is connected to the first backup energy storage power supply.

[0041] It should be noted that the first switch Q1 is used to control the on / off flow of current. The first switch Q1 can be a MOSFET, IGBT, or other power transistor that implements a switching function, and this embodiment is not limited thereto. The first diode D1 is used to prevent reverse current and protect the circuit. The magnetic switch KA is used to switch the power connection and can be implemented by a relay or solid-state relay. The control unit 20 generates a control signal based on the system status and transmits it to the control terminal of the first switch Q1 via the communication interface. When the control unit 20 sends a high-level signal, the first switch Q1 is turned on, and current flows from the input terminal to the output terminal of the first switch Q1. The current simultaneously flows from the positive electrode to the negative electrode of the first diode D1 and from one end to the other end of the magnetic switch coil, energizing the magnetic switch coil. When the magnetic switch coil is energized, the electromagnet inside the magnetic switch KA generates a magnetic field, driving the contacts. This contact movement causes the connection between the first, second, and third terminals of the magnetic switch KA to change, thereby switching the power supply. In the normal power supply state, the second terminal of the magnetic switch KA is connected to the first terminal, and the main energy storage power supply supplies power to the multi-port inverter through the magnetic switch KA. When switching to the first backup energy storage power supply, when the control unit 20 detects that the power supply needs to be switched, the third end of the magnetic switch KA is connected to the first end, and the first backup energy storage power supply supplies power to the multi-port inverter through the magnetic switch KA.

[0042] In this embodiment, the first switch unit 30 further includes: a first resistor R1, a second resistor R2, a first light emitting diode LED1, a first photocoupler OC1 and a third resistor R3; Wherein, a first end of the first resistor R1 is connected to the power supply, a second end of the first resistor R1 is connected to the anode of the first light-emitting diode LED1, a cathode of the first light-emitting diode LED1 is connected to the first end of the first photoelectric coupler OC1, a second end of the first photoelectric coupler OC1 is connected to the control unit 20, a third end of the first photoelectric coupler OC1 is connected to the second end of the second resistor R2, a first end of the second resistor R2 is connected to the power supply, a fourth end of the first photoelectric coupler OC1 is connected to the first end of the third resistor R3 and the control end of the first switch tube Q1, and a second end of the third resistor R3 is grounded.

[0043] It should be noted that the first resistor R1 is used for current limiting and protection of the first light-emitting diode LED1. The second resistor R2 is used to provide a bias voltage for the first photocoupler OC1. The first light-emitting diode LED1 is used to indicate the circuit status. The first photocoupler OC1 is used to isolate the control signal and improve the system's anti-interference capability. The third resistor R3 is used to pull down the control terminal of the first switching transistor Q1 to ensure that it is in the off state when there is no signal.

[0044] In specific implementations, the control unit 20 generates a control signal based on the system status and sends it to the second terminal of the first optocoupler OC1 via the communication interface. When the control unit 20 sends a high-level signal, the internal LED of the first optocoupler OC1 illuminates, turning on the phototransistor. The fourth terminal of the first optocoupler OC1 is connected to the control terminal of the first switch Q1 via the third resistor R3, allowing the control terminal of the first switch Q1 to receive a high-level signal. When the control terminal of the first switch Q1 receives a high-level signal, the first switch Q1 turns on, and current flows from the input terminal to the output terminal (ground) of the first switch Q1. Current simultaneously flows from the anode to the cathode of the first diode D1 and from one end to the other of the coil of the magnetic switch KA, energizing the coil of the magnetic switch KA. When the coil of the magnetic switch KA is energized, the electromagnet inside the magnetic switch KA generates a magnetic field, driving the contacts. This contact movement changes the connection between the first, second, and third terminals of the magnetic switch KA, thereby switching the power supply. When the internal LED of the first optocoupler OC1 illuminates, the first light-emitting diode LED1 also illuminates, indicating the circuit status. The user can understand the working condition of the first switch unit 30 by observing the state of the first light emitting diode LED1.

[0045] Reference Figure 3The second switch unit 60 includes: a second switch tube Q2, a third switch tube Q3 and a fourth resistor R4; In which, the first end of the fourth resistor R4 is connected to the third end of the magnetic switch KA, the second end of the fourth resistor R4 is connected to the output end of the second switch tube Q2 and the output end of the third switch tube Q3, the input end of the third switch tube Q3 is connected to the first backup energy storage power supply, the control end of the third switch tube Q3 is connected to the control unit 20, the input end of the second switch tube Q2 is connected to the second backup energy storage power supply, and the control end of the second switch tube Q2 is connected to the control unit 20.

[0046] It should be noted that the second switch Q2 is used to control the on / off of the second backup energy storage power supply and can utilize a MOSFET or IGBT. The third switch Q3 is used to control the on / off of the first backup energy storage power supply and can also utilize a MOSFET or IGBT. The fourth resistor R4 is used for current limiting and circuit protection. The control unit 20 is used to receive operating parameters of the first and second backup energy storage power supplies and determine whether the operating parameters meet preset conditions, such as whether the voltage is within a safe range or whether the remaining capacity is sufficient. If the operating parameters do not meet the preset conditions, a new control signal is generated and sent to the second switch unit 60 via the communication interface. After receiving the control signal, the third switch Q3 is turned on or off based on the signal status. When turned on, the first backup energy storage power supply supplies power to the multi-port inverter via the fourth resistor R4 and the third terminal of the magnetic switch KA. After receiving the control signal, the second switch Q2 is turned on or off based on the signal status. When turned on, the second backup energy storage power supply supplies power to the multi-port inverter via the fourth resistor R4 and the third terminal of the magnetic switch KA. The control unit 20 receives information about the conduction status of the first and second switch units 30 and 60. The power supply status of the main energy storage power supply, the first backup energy storage power supply and the second backup energy storage power supply is displayed through an indicator light or a display screen.

[0047] The state indicating unit 70 includes: a second light emitting diode LED2, a fifth resistor R5, a third light emitting diode LED3 and a sixth resistor R6; Among them, the positive electrode of the second light-emitting diode LED2 is connected to the output end of the control unit 20 for controlling the power supply circuit of the second backup energy storage power supply to be turned on, the negative electrode of the second light-emitting diode LED2 is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is grounded, the positive electrode of the third light-emitting diode LED3 is connected to the output end of the control unit 20 for controlling the power supply circuit of the first backup energy storage power supply to be turned on, the negative electrode of the third light-emitting diode LED3 is connected to the first end of the sixth resistor R6, and the second end of the sixth resistor R6 is grounded.

[0048] It should be noted that the control unit 20 generates control signals based on the system status and transmits them to the second switch unit 60 and the first switch unit 30 via the communication interface. The control unit 20 also generates indication signals and transmits them to the second light-emitting diode LED2 and the third light-emitting diode LED3. When the control unit 20 detects that the second backup energy storage power supply is supplying power to the multi-port inverter, the control unit 20 sends a high-level signal to the anode of the second light-emitting diode LED2. Upon receiving the high-level signal, current flows through the anode of the second light-emitting diode LED2, causing it to illuminate, indicating that the second backup energy storage power supply is supplying power. Current flows to ground through the fifth resistor R5, which acts as a current limiter to protect the second light-emitting diode LED2. When the control unit 20 detects that the first backup energy storage power supply is supplying power to the multi-port inverter, the control unit 20 sends a high-level signal to the anode of the third light-emitting diode LED3. Upon receiving the high-level signal, current flows through the anode of the third light-emitting diode LED3, causing it to illuminate, indicating that the first backup energy storage power supply is supplying power. The current flows to the ground through the sixth resistor R6 , and the sixth resistor R6 plays a current limiting role to protect the third light emitting diode LED3 .

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-port inverter and energy storage power supply integrated system, characterized in that: The system includes: a parameter acquisition unit, a control unit, and a first switch unit; The parameter acquisition unit is connected to the control unit, the control unit is connected to the first switch unit, the first switch unit is connected to the main energy storage power supply, the first backup energy storage power supply and the multi-port inverter respectively, and the multi-port inverter is connected to the power-consuming device; The parameter acquisition unit is configured to collect operating parameters of a plurality of electric devices when the plurality of electric devices are connected to different ports of the multi-port inverter, and output power electrical signals of the plurality of electric devices to the control unit; The control unit is configured to compare the power of the plurality of electrical devices according to the power electrical signals corresponding to the plurality of electrical devices, and when the power difference between the electrical devices is greater than a preset power difference, determine that the electrical device whose operating voltage is lower than the normal operating voltage threshold is an insufficiently powered device, and output a corresponding control signal to the first switch unit; The first switch unit is used to conduct the power supply connection between the first backup energy storage power supply and the insufficiently powered device according to the control signal, and to disconnect the power supply connection between the main energy storage power supply and the insufficiently powered device.

2. The multi-port inverter and energy storage power supply integrated system according to claim 1, wherein: The system also includes a power switch button and a voltage conversion unit; The power switch button is connected to the first backup energy storage power supply and the voltage conversion unit respectively, and the voltage conversion unit is connected to the control unit; The power switch button is configured to, upon receiving a power switch instruction from a target electrical device, connect the first backup energy storage power supply to the voltage conversion unit so that the first backup energy storage power supply outputs a power voltage to the voltage conversion unit; The voltage conversion unit is used to convert the power supply voltage into the operating voltage of the control unit, so that the control unit controls the first switch unit to conduct the power supply connection between the first backup energy storage power supply and the target electrical equipment.

3. The multi-port inverter and energy storage power supply integrated system according to claim 1, wherein: The system further includes: a power detection unit and a second switch unit; The power detection unit is connected to the first backup energy storage power supply and the control unit, and the second switch unit is connected to the control unit, the second backup energy storage power supply and the multi-port inverter; The power supply detection unit is configured to collect operating parameters of the first backup energy storage power supply and output the operating parameters to the control unit; The control unit is further configured to disconnect the power supply connection between the first backup energy storage power supply and the insufficiently powered device, and connect the power supply connection between the second backup energy storage power supply and the insufficiently powered device, when the operating parameters do not meet preset conditions.

4. The multi-port inverter and energy storage power supply integrated system according to claim 3, characterized in that: The system further comprises: a status indicating unit: The state indicating unit is connected to the first switch unit and the second switch unit respectively; The state indicating unit is used to indicate the conduction state of the first switch unit or the second switch unit to display the energy supply state of the main energy storage power supply, the first backup energy storage power supply and the second backup energy storage power supply.

5. The multi-port inverter and energy storage power supply integrated system according to claim 1, wherein: The control unit is further configured to receive operating status data of a plurality of electrical devices from the parameter acquisition unit in real time, including power, current, voltage, usage frequency, operating time and fault record information; Determine the importance score, power demand score, usage frequency score within a preset time, cumulative operating time, and number of failures within a preset period for each electrical device based on the operating status data; The priority score of each electric device is determined based on the priority calculation formula, and the electric device with a priority score lower than the preset score threshold is determined as the target electric device, and the power supply connection between the first backup energy storage power supply and the target electric device is connected.

6. The multi-port inverter and energy storage power supply integrated system according to claim 5, characterized in that: The priority calculation formula is: Where, Score the priority of electrical equipment. is the weight coefficient of importance score, Rate the importance, is the weighting factor for power demand scoring, Score the power demand, is the weight coefficient of frequency of use score, Score the frequency of use within a preset time period. is the weight coefficient of the cumulative running time, is the cumulative running time, is the weight coefficient of the number of failures within the preset period, is the number of faults within the preset period.

7. The multi-port inverter and energy storage power supply integrated system according to claim 3, wherein: The first switch unit includes: a first switch tube, a first diode and a magnetic switch; Wherein, the control end of the first switching tube is connected to the control unit, the input end of the first switching tube is connected to the positive pole of the first diode and one end of the magnetic switch coil, the output end of the first switching tube is grounded, the negative pole of the first diode is connected to the other end of the magnetic switch coil, the first end of the magnetic switch is connected to the multi-port inverter, the second end of the magnetic switch is connected to the main energy storage power supply, and the third end of the magnetic switch is connected to the first backup energy storage power supply.

8. The multi-port inverter and energy storage power supply integrated system according to claim 7, wherein: The first switch unit further includes: a first resistor, a second resistor, a first light emitting diode, a first photocoupler and a third resistor; Among them, the first end of the first resistor is connected to the power supply, the second end of the first resistor is connected to the anode of the first light-emitting diode, the cathode of the first light-emitting diode is connected to the first end of the first photoelectric coupler, the second end of the first photoelectric coupler is connected to the control unit, the third end of the first photoelectric coupler is connected to the second end of the second resistor, the first end of the second resistor is connected to the power supply, the fourth end of the first photoelectric coupler is connected to the first end of the third resistor and the control end of the first switching tube, and the second end of the third resistor is grounded.

9. The multi-port inverter and energy storage power supply integrated system according to claim 8, characterized in that: The second switch unit includes: a second switch tube, a third switch tube and a fourth resistor; Wherein, the first end of the fourth resistor is connected to the third end of the magnetic switch, the second end of the fourth resistor is connected to the output end of the second switching tube and the output end of the third switching tube, the input end of the third switching tube is connected to the first backup energy storage power supply, the control end of the third switching tube is connected to the control unit, the input end of the second switching tube is connected to the second backup energy storage power supply, and the control end of the second switching tube is connected to the control unit.

10. The multi-port inverter and energy storage power supply integrated system according to claim 4, characterized in that: The state indicating unit includes: a second light emitting diode, a fifth resistor, a third light emitting diode and a sixth resistor; Among them, the positive electrode of the second light-emitting diode is connected to the output end of the control unit for controlling the power supply circuit of the second backup energy storage power supply to be turned on, the negative electrode of the second light-emitting diode is connected to the first end of the fifth resistor, the second end of the fifth resistor is grounded, the positive electrode of the third light-emitting diode is connected to the output end of the control unit for controlling the power supply circuit of the first backup energy storage power supply to be turned on, the negative electrode of the third light-emitting diode is connected to the first end of the sixth resistor, and the second end of the sixth resistor is grounded.

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