Isolation control system of photovoltaic energy storage equipment and photovoltaic energy storage equipment

Abstract

The utility model discloses an isolation control system of photovoltaic energy storage equipment and the photovoltaic energy storage equipment, and the system comprises a first power control unit which is arranged in an input voltage area of the photovoltaic energy storage equipment and is used for the power control of the input voltage area; the second power control unit is arranged in an inversion voltage area of the photovoltaic energy storage equipment and is used for performing power control on the inversion voltage area; the voltage of the input voltage area is lower than that of the inverter voltage area, a first isolation communication assembly is arranged between the first power control unit and the second power control unit, and the first power control unit and the second power control unit carry out data communication through the first isolation communication assembly so as to transmit communication information. Therefore, the isolation control of different voltage areas in the photovoltaic energy storage equipment is realized, the use requirements of a plurality of analog isolation and digital isolation devices are reduced, and the equipment cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, and in particular to an isolation control system for photovoltaic energy storage equipment and photovoltaic energy storage equipment. Background Art

[0002] When designing current photovoltaic energy storage devices, it is necessary to consider both outdoor portable use scenarios and home use scenarios to meet user needs. Among them, the outdoor portable use scenario is a low-voltage scenario, and the device needs to limit the internal photovoltaic module voltage to a low voltage, for example, below 60V, to ensure safety for outdoor use. The home environment use scenario is a high-voltage scenario. For example, when using photovoltaic energy storage devices in a home environment such as a balcony, since the device needs to be connected to the grid, in order to be able to effectively supply power to the grid, the photovoltaic module voltage inside the device needs to be increased to a high-voltage level suitable for inverter output.

[0003] In summary, current photovoltaic energy storage devices have two areas inside: high voltage (the voltage required for inverter output) and low voltage (the voltage input to the photovoltaic module). Therefore, when controlling the power of power devices in photovoltaic energy storage devices, existing solutions require electrical isolation of these two areas due to safety regulations to prevent power from the high-voltage area from entering the low-voltage area and causing danger. Specifically, to ensure that each device in the two areas can achieve high-low voltage conversion respectively, existing solutions generally use a power control unit + a combination of multiple analog isolation and digital isolation devices to electrically isolate and control multiple devices in different areas. Due to the need to use multiple analog isolation and digital isolation devices, the equipment cost of the existing solutions is high. Utility Model Content

[0004] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and to provide an isolation control system for photovoltaic energy storage equipment and a photovoltaic energy storage device. The isolation control of different voltage regions in the photovoltaic energy storage device can be achieved through isolated communication between a first power control unit and a second power control unit, thereby reducing the need for the use of multiple analog isolation and digital isolation devices, thereby effectively reducing equipment costs.

[0005] In a first aspect, an embodiment of the present invention provides an isolation control system for a photovoltaic energy storage device, comprising: a first power control unit, arranged in an input voltage region of the photovoltaic energy storage device, for performing power control in the input voltage region; a second power control unit, arranged in an inverter voltage region of the photovoltaic energy storage device, for performing power control in the inverter voltage region; the voltage in the input voltage region is lower than the voltage in the inverter voltage region, a first isolation communication component is arranged between the first power control unit and the second power control unit, and the first power control unit and the second power control unit perform data communication through the first isolation communication component to transmit communication information.

[0006] According to an embodiment of the present invention, an isolation control system for a photovoltaic energy storage device is provided, which has at least the following beneficial effects: the isolation control system for the photovoltaic energy storage device in the embodiment of the present application is configured to respectively arrange a first power control unit and a second power control unit in the input voltage region and the inverter voltage region of the power device, so that the first power control unit and the second power control unit can respectively control the power devices in their respective regions. In this way, it is only necessary to arrange a first isolation communication component between the first power control unit and the second power control unit so that the first power control unit and the second power control unit can communicate data through the first isolation communication component and transmit communication information related to the power device, thereby realizing the control of the power conversion of the high and low voltage regions by the isolation control system; it is understandable that since the power devices in the input voltage region and the inverter voltage region do not need to be isolated from the corresponding power control unit, the need for the use of multiple analog isolation and digital isolation devices can be reduced, thereby effectively simplifying the structure and reducing costs; and the first power control unit and the second power control unit communicate in isolation, and the scheme of controlling the input voltage region and the inverter voltage region respectively has lower performance requirements for a single power control unit, which can reduce the use cost of a high-performance power control unit and further reduce costs.

[0007] In some embodiments, the isolation control system of the photovoltaic energy storage device also includes: a third power control unit, a second isolation communication component is arranged between the third power control unit and the first power control unit or the second power control unit, and the third power control unit communicates data with the first power control unit or the second power control unit through the second isolation communication component to perform human-computer interaction functions.

[0008] In some embodiments, the communication information includes multiple different types of communication data, and the first power control unit and the second power control unit both store the sending priorities of the multiple different types of communication data.

[0009] In some embodiments, the communication information includes electrical parameter data, control information data and fault information data, the sending priority of the electrical parameter data is lower than the sending priority of the control information data, and the sending priority of the control information data is lower than the sending priority of the fault information data.

[0010] In some embodiments, the first power control unit is used to transmit the electrical parameter data of the input voltage region and the inverter voltage region to a connected host computer after obtaining the electrical parameter data of the inverter voltage region transmitted by the second power control unit; or, the second power control unit is used to transmit the electrical parameter data of the input voltage region and the inverter voltage region to a connected host computer after obtaining the electrical parameter data of the input voltage region transmitted by the first power control unit.

[0011] In some embodiments, the system also includes a power conversion module, which includes a first part located in the input voltage region and a second part located in the inverter voltage region; the first power control unit is used to send a first control sampling signal to the first part, and send the control information data to the second power control unit so that the second power control unit sends a second control sampling signal to the second part; or, the second power control unit is used to send a second control sampling signal to the second part, and send the control information data to the first power control unit so that the first power control unit sends a first control sampling signal to the first part.

[0012] In some embodiments, the first power control unit and the second power control unit are both pre-installed with a safety protection program corresponding to the fault information data, and the first power control unit and the second power control unit are used to execute the safety protection program after obtaining the fault information data.

[0013] In some embodiments, the input voltage area is further provided with a first isolation chip, and the power devices in the input voltage area send preset type of communication data to the power devices in the inverter voltage area through the first isolation chip. The inverter voltage area is also provided with a second isolation chip, and the power devices in the inverter voltage area send preset type of communication data to the power devices in the input voltage area through the second isolation chip.

[0014] In some embodiments, the first power control unit is communicatively connected to the power devices in the input voltage region, and the second power control unit is communicatively connected to the power devices in the inverter voltage region. The first power control unit and the second power control unit are respectively used to send digital signals to the corresponding power devices and obtain analog signals from the power devices.

[0015] In a second aspect, an embodiment of the present invention provides a photovoltaic energy storage device, comprising the isolation control system of the photovoltaic energy storage device described in any embodiment of the first aspect.

[0016] According to an embodiment of the present invention, a photovoltaic energy storage device is provided, which has at least the following beneficial effects: since the photovoltaic energy storage device includes the isolation control system of the photovoltaic energy storage device described in any embodiment of the first aspect, the isolation control system can respectively set the first power control unit and the second power control unit in the input voltage region and the inverter voltage region of the power device, so that the first power control unit and the second power control unit can respectively control the power devices in their respective regions. In this way, it is only necessary to set a first isolation communication component between the first power control unit and the second power control unit so that the first power control unit and the second power control unit can communicate data through the first isolation communication component and transmit communication information related to the power device, so as to realize the control of the power conversion of the high and low voltage regions by the isolation control system; it is understandable that since the power devices in the input voltage region and the inverter voltage region do not need to be isolated from the corresponding power control unit, the need for the use of multiple analog isolation and digital isolation devices can be reduced, thereby effectively simplifying the structure and reducing costs; and the first power control unit and the second power control unit communicate in isolation, and the solution of controlling the input voltage region and the inverter voltage region respectively has lower performance requirements for a single power control unit, which can reduce the use cost of high-performance power control units and further reduce costs.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is an optional structural diagram of an isolation control system for a photovoltaic energy storage device provided by an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of an optional structure in which a third power control unit is provided in an isolation control system of a photovoltaic energy storage device provided by an embodiment of the present utility model;

[0022] Figure 3 This is another optional structural diagram of an isolation control system for a photovoltaic energy storage device provided by an embodiment of the present utility model, in which a third power control unit is provided;

[0023] Figure 4 This is a schematic diagram of an optional structure for connecting to a host computer in an isolation control system of a photovoltaic energy storage device provided by an embodiment of the present utility model;

[0024] Figure 5 This is another optional structural diagram of connecting to a host computer in an isolation control system of a photovoltaic energy storage device provided by an embodiment of the present utility model;

[0025] Figure 6 This is a schematic diagram of an optional structure in which a power conversion module is provided in an isolation control system of a photovoltaic energy storage device provided by an embodiment of the present utility model;

[0026] Figure 7 This is a schematic diagram of an optional structure in which an isolation chip is provided in an isolation control system of a photovoltaic energy storage device provided by an embodiment of the present utility model.

[0027] Reference numerals:

[0028] 100. Isolation control system of photovoltaic energy storage equipment; 110. Input voltage area; 111. First power control unit; 120. Inverter voltage area; 121. Second power control unit; 130. Human-computer interaction area; 131. Third power control unit; 140. Host computer; 150. Power conversion module; 160. First isolation chip; 170. Second isolation chip. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0030] In the description of this utility model, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, and "above," "below," and "within" are understood to include the number itself. "Any one" means one or more, and "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] It should be noted that the terms "set," "install," and "connect" in the embodiments of the present invention should be interpreted broadly. Those skilled in the art can reasonably determine the specific meanings of these terms in the embodiments of the present invention based on the specific content of the technical solution. For example, the term "connect" can refer to mechanical connection, electrical connection, or communication; it can refer to direct connection or indirect connection through an intermediary.

[0032] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as there is no conflict between them.

[0033] When designing current photovoltaic energy storage devices, it is necessary to consider both outdoor portable use scenarios and home use scenarios to meet user needs. Among them, the outdoor portable use scenario is a low-voltage scenario, and the device needs to limit the internal photovoltaic module voltage to a low voltage, for example, below 60V, to ensure safety for outdoor use. The home environment use scenario is a high-voltage scenario. For example, when using photovoltaic energy storage devices in a home environment such as a balcony, since the device needs to be connected to the grid, in order to be able to effectively supply power to the grid, the photovoltaic module voltage inside the device needs to be increased to a high-voltage level suitable for inverter output.

[0034] In summary, current photovoltaic energy storage devices have two areas inside: high voltage (the voltage required for inverter output) and low voltage (the voltage input to the photovoltaic module). Therefore, when controlling the power of power devices in photovoltaic energy storage devices, existing solutions require electrical isolation of these two areas due to safety regulations to prevent power from the high-voltage area from entering the low-voltage area and causing danger. Specifically, to ensure that each device in the two areas can achieve high-low voltage conversion respectively, existing solutions generally use a power control unit + a combination of multiple analog isolation and digital isolation devices to electrically isolate and control multiple devices in different areas. Due to the need to use multiple analog isolation and digital isolation devices, the equipment cost of the existing solutions is high.

[0035] Based on this, reference Figure 1 , Figure 1It is an optional structural diagram of an isolation control system of a photovoltaic energy storage device provided by an embodiment of the present invention; in the first aspect, an embodiment of the present invention provides an isolation control system 100 of a photovoltaic energy storage device, including: a first power control unit 111, arranged in the input voltage area 110 of the photovoltaic energy storage device, for performing power control in the input voltage area 110; a second power control unit 121, arranged in the inverter voltage area 120 of the photovoltaic energy storage device, for performing power control in the inverter voltage area 120; the voltage of the input voltage area 110 is lower than the voltage of the inverter voltage area 120, and a first isolation communication component is arranged between the first power control unit 111 and the second power control unit 121, and the first power control unit 111 and the second power control unit 121 perform data communication through the first isolation communication component to transmit communication information.

[0036] It can be understood that the photovoltaic energy storage device in the embodiment of the present application is a balcony photovoltaic energy storage device, which is compatible with outdoor portability and balcony use. The balcony photovoltaic energy storage device is a low-voltage system of less than 60V, so that power devices such as photovoltaic modules in the device cannot be connected in series. Only photovoltaic modules below 60V can be selected. In order to increase power, photovoltaic modules are selected in parallel, without increasing voltage but increasing current. When the device is used on the balcony, it will be connected to the 220V / 230VAC power grid, so the photovoltaic input voltage will be increased inside the device for inverter output. In this way, there will be a high-voltage inverter voltage region 120 and a low-voltage input voltage region 110 inside the machine. The input voltage region 110 and the inverter voltage region 120 need to be isolated. Currently, related products usually use a single high-performance MCU for controlling power conversion in high and low voltage areas. If a single high-performance MCU is used to control power conversion in high and low voltage areas at the same time, in order to achieve isolation, a large number of analog isolation and digital isolation devices are usually selected in conjunction. The prices of these devices are relatively high, and the price of a single high-performance MCU is not low, so the cost of the entire control system will be too high.

[0037] Among them, the isolation control system 100 of the photovoltaic energy storage device in the embodiment of the present application is configured to respectively set the first power control unit 111 and the second power control unit 121 in the input voltage region 110 and the inverter voltage region 120 of the power device, so that the first power control unit 111 and the second power control unit 121 can respectively control the power devices in their respective regions. In this way, only a first isolation communication component is required between the first power control unit 111 and the second power control unit 121, so that the first power control unit 111 and the second power control unit 121 can communicate data through the first isolation communication component to transmit power device-related information. Communication information can realize the control of power conversion between high and low voltage areas by the isolation control system; it can be understood that since the power devices in the input voltage area 110 and the inverter voltage area 120 do not need to be isolated from the corresponding power control units, the demand for the use of multiple analog isolation and digital isolation devices can be reduced, thereby effectively simplifying the structure and reducing costs; and the first power control unit 111 and the second power control unit 121 communicate in isolation, and the solution of controlling the input voltage area 110 and the inverter voltage area 120 respectively has lower performance requirements for a single power control unit, which can reduce the cost of using high-performance power control units and further reduce costs.

[0038] In some embodiments, a first isolation communication component is provided between the first power control unit 111 (low-voltage side) and the second power control unit 121 (high-voltage side) to implement data communication between the two units, thereby ensuring that data is securely transmitted between the high- and low-voltage areas while maintaining electrical isolation. It is conceivable that in traditional control systems, in order to achieve electrical isolation between the high- and low-voltage areas, a large number of analog isolation and digital isolation devices are usually required. These devices are not only costly but also increase the complexity and failure rate of the system. However, in the embodiments of the present application, by providing a first isolation communication component between the first power control unit 111 and the second power control unit 121, isolated data transmission can be achieved, requiring only a small number of isolation chips instead of a large number of analog and digital isolation devices, thereby greatly reducing the need for isolation devices.

[0039] In some embodiments, the first isolated communication component is responsible for transmitting various data related to the power device, such as voltage, current, temperature, and control signals. This data is exchanged between the high-voltage and low-voltage areas to ensure the normal operation of the system. In addition, a variety of communication protocols, such as UART, SPI, I2C, and Ethernet, can be used to transmit communication information related to the power device, allowing the isolated control system to control power conversion between the high-voltage and low-voltage areas.

[0040] refer to Figure 2 and Figure 3, Figure 2 This is an optional structural diagram of a third power control unit 131 in an isolation control system 100 of a photovoltaic energy storage device provided by an embodiment of the present utility model; Figure 3 This is another optional structural diagram of setting a third power control unit 131 in an isolation control system 100 of a photovoltaic energy storage device provided by an embodiment of the present utility model; in some embodiments, the isolation control system 100 of the photovoltaic energy storage device also includes: a third power control unit 131, a second isolation communication component is set between the third power control unit 131 and the first power control unit 111 or the second power control unit 121, and the third power control unit 131 communicates data with the first power control unit 111 or the second power control unit 121 through the second isolation communication component to perform human-computer interaction functions.

[0041] It can be understood that the photovoltaic energy storage device in the embodiment of the present application is a balcony photovoltaic energy storage device, which is compatible with outdoor carrying and balcony use. The product positioning of the balcony photovoltaic energy storage device is similar to that of household appliances. There will be many human-machine function modules arranged in the human-machine interaction area 130. The human-machine interaction area 130 is a user-touchable area, so sufficient safety isolation is required. For example, the minimum impulse voltage of all photovoltaic modules is 2500V, so the human-machine interaction area 130 in the device must be isolated from the input voltage area 110 and the inverter voltage area 120. In this case, if you want a device to be compatible with both balcony and portable use, it must also meet the regulatory requirements of most regions, and its isolation design solution is relatively complicated.

[0042] Among them, the photovoltaic energy storage device in the embodiment of the present application can be provided by respectively setting the first power control unit 111 and the second power control unit 121 in the input voltage region 110 and the inverter voltage region 120 of the power device, so that the first power control unit 111 and the second power control unit 121 can respectively control the power devices in their respective regions, and then providing a third power control unit 131. A second isolation communication component is provided between the third power control unit 131 and the first power control unit 111 or the second power control unit 121 to achieve isolation between the human-computer interaction region 130 and the input voltage region 110 and the inverter voltage region 120, such as Figure 2 As shown, the third power control unit 131 is connected to the first power control unit 111, or as shown Figure 3 As shown, the third power control unit 131 is connected to the second power control unit 121 .

[0043] In some embodiments, the third power control unit 131 is set in the human-computer interaction area 130, and is used for electrically isolated data communication with the first power control unit 111 set in the input voltage area 110. It can be understood that the MCU in the low-voltage area and the MCU for human-computer interaction are usually selected for isolated communication. Because the voltage in the input voltage area 110 is lower, the connection of the third power control unit to the first power control unit 111 can improve the voltage isolation effect.

[0044] In some embodiments, the performance index requirements of the first power control unit 111 and the second power control unit 121 are lower than the performance index requirements of the third power control unit 131. It can be understood that the power control unit in this application is an MCU. In existing solutions, two high-performance MCUs are often selected, one high-end MCU is used for high-voltage and low-voltage area power conversion control, and the other is used for human-computer interaction. In this application, two relatively low-performance MCUs plus one high-performance MCU can be used to achieve the same function, as follows:

[0045] The first power control unit 111 is responsible for power conversion control on the low-voltage side, including sending PWM waves to control power switches and I / O signals to control relays. It also collects analog quantities such as voltage, current, and temperature in the region for control calculations. Because the control complexity on the low-voltage side is relatively low, a lower-performance MCU can be used to perform these tasks.

[0046] The second power control unit 121 is responsible for power conversion control on the high-voltage side. This includes sending PWM waves to control power switches and I / O signals to control relays. It also collects analog values ​​such as voltage, current, and temperature in the region for control calculations. Although the control complexity on the high-voltage side is slightly higher than that on the low-voltage side, a lower-performance MCU can still be used to complete these tasks.

[0047] The third power control unit 131 is specifically responsible for human-computer interaction functions, including display, key operation, and communication interfaces. Human-computer interaction functions typically require processing more data and complex user interfaces, thus placing higher demands on the MCU's performance. Therefore, the third power control unit 131 uses a high-performance MCU to complete these tasks.

[0048] It is understandable that by using two relatively low-performance MCUs plus one high-performance MCU instead of two high-performance MCUs, the hardware cost can be significantly reduced. The price of high-performance MCUs is usually higher, while the cost of low-performance MCUs is lower. Especially in large-scale production, the cost saving effect is more obvious.

[0049] In some embodiments, the communication information includes multiple different types of communication data, and the first power control unit 111 and the second power control unit 121 both store the sending priorities of multiple different types of communication data. It can be understood that in cross-regional system control, the external communication speed is limited, so the device will store control logic data for data priority division according to actual conditions. When the first power control unit 111 and the second power control unit 121 transmit communication information, different types of communication data can be sent based on the stored sending priorities of multiple different types of communication data to improve system performance.

[0050] In some embodiments, communication information includes electrical parameter data, control information data, and fault information data. The transmission priority of electrical parameter data is lower than the transmission priority of control information data, and the transmission priority of control information data is lower than the transmission priority of fault information data. It can be understood that electrical parameter data corresponds to slow communication data, control information data corresponds to fast communication data, and fault information data corresponds to emergency communication data. The specific types of communication are as follows:

[0051] Slow communication refers to the transmission of data with less real-time requirements, such as voltage, current, power, temperature, power generation statistics, and equipment status. The first power control unit 111 and the second power control unit 121 independently control all functions within their respective areas. The transmitted voltage, current, power, and other information is only used for information exchange and is uploaded to the host computer for data monitoring.

[0052] Fast communication refers to the transmission of data with high real-time requirements, such as loop control data and control logic. This device contains a power conversion module that connects the high-voltage and low-voltage areas. In this case, one of the first power control unit 111 and the second power control unit 121 is typically selected to control the entire module. Control signals and sampling signals are transmitted during this process. These signals are used for control and therefore fall under fast communication.

[0053] Emergency communication involves the transmission of urgent data, typically 0 / 1 digital signals, such as fault, wave blocking, and enable information. When a fault or other emergency information occurs in a high- or low-voltage area, it is immediately transmitted to the MCU in the other area. Upon receiving the information, the other MCU will simultaneously initiate protective actions such as wave blocking. Because this information involves faults and safety, it is classified as emergency communication and has the highest priority.

[0054] It is understandable that slow communication can reduce the use of communication bandwidth and improve the overall efficiency of the system; fast communication can ensure that the control system can respond in a timely manner and improve the dynamic performance of the system; emergency communication can ensure that the system can quickly take protective measures in the event of a fault and improve system stability; in summary, based on the above scheme, effective isolation control of photovoltaic energy storage equipment can be achieved.

[0055] refer to Figure 4 and Figure 5 , Figure 4 This is an optional structural diagram of a photovoltaic energy storage device isolation control system 100 provided by an embodiment of the present invention, connected to a host computer; Figure 5 This is another optional structural diagram of a photovoltaic energy storage device connected to a host computer in an isolation control system 100 provided by an embodiment of the present invention; in some embodiments, the first power control unit 111 is used to transmit the electrical parameter data of the input voltage region 110 and the inverter voltage region 120 to the connected host computer after obtaining the electrical parameter data of the inverter voltage region 120 transmitted by the second power control unit 121; or, the second power control unit 121 is used to transmit the electrical parameter data of the input voltage region 110 and the inverter voltage region 120 to the connected host computer after obtaining the electrical parameter data of the input voltage region 110 transmitted by the first power control unit 111.

[0056] Among them, such as Figure 4 As shown, the host computer 140 is connected to the first power control unit 111, or as shown in FIG. Figure 5 As shown, the host computer 140 is connected to the second power control unit 121. It can be understood that the host computer 140 can be set inside the photovoltaic energy storage device mentioned in this application, or outside the photovoltaic energy storage device mentioned, and can be connected to the first power control unit 111 or the second power control unit 121, or to the third power control unit 131 to realize the function of reporting electrical parameter data.

[0057] It can be understood that when electrical parameter data is transmitted, the first power control unit 111 and the second power control unit 121 respectively collect electrical parameter data of their respective areas, and through the first isolation communication component, the first power control unit 111 and the second power control unit 121 transmit electrical parameter data to each other, and the first power control unit 111 or the second power control unit 121 transmits the collected electrical parameter data to the host computer 140 for data monitoring and recording.

[0058] refer to Figure 6 , Figure 6This is an optional structural diagram of an isolation control system 100 of a photovoltaic energy storage device provided by an embodiment of the present invention, in which a power conversion module 150 is set; in some embodiments, the system also includes a power conversion module 150, and the power conversion module 150 includes a first part located in the input voltage area 110 and a second part located in the inverter voltage area 120; the first power control unit 111 is used to send a first control sampling signal to the first part, and send control information data to the second power control unit 121, so that the second power control unit 121 sends a second control sampling signal to the second part; or, the second power control unit 121 is used to send a second control sampling signal to the second part, and send control information data to the first power control unit 111, so that the first power control unit 111 sends the first control sampling signal to the first part.

[0059] It can be understood that the first part of the power conversion module 150 is located in the input voltage area 110 and is responsible for power conversion on the low-voltage side. The second part of the power conversion module 150 is located in the inverter voltage area 120 and is responsible for power conversion on the high-voltage side. The first power control unit 111 is used to send a first control sampling signal to the first part to control the power conversion on the low-voltage side, and to send control information data to the second power control unit 121 to transmit control logic and instructions so that the second power control unit 121 can control the power conversion on the high-voltage side.

[0060] In some embodiments, the second power control unit 121 is used to send a second control sampling signal to the second part: to control the power conversion on the high-voltage side, and to send control information data to the first power control unit 111: to transmit control logic and instructions so that the first power control unit 111 can control the power conversion on the low-voltage side. It can be understood that in this application, one of the high / low voltage MCUs can be selected to control the entire power conversion module 150. At this time, control information data such as control signals and sampling signals will be transmitted. These control information data will be used to control the control and sampling of the power conversion module 150 by another regional control unit to achieve high-voltage power conversion.

[0061] Specifically, when the first power control unit 111 is the master control unit, the first power control unit 111 sends a first control sampling signal to the first part to control the power conversion on the low-voltage side; the first power control unit 111 sends control information data to the second power control unit 121; after receiving the control information data, the second power control unit 121 sends a second control sampling signal to the second part to control the power conversion on the high-voltage side. When the second power control unit 121 is the master control unit, the second power control unit 121 sends a second control sampling signal to the second part to control the power conversion on the high-voltage side; the second power control unit 121 sends control information data to the first power control unit 111; after receiving the control information data, the first power control unit 111 sends the first control sampling signal to the first part to control the power conversion on the low-voltage side. Both the first power control unit 111 and the second power control unit 121 can serve as the master control unit and can be flexibly switched according to actual needs, thereby improving the adaptability and flexibility of the system.

[0062] In some embodiments, the first part is located in the input voltage area 110, and is responsible for boosting or lowering the photovoltaic input voltage to meet system requirements. The second part is located in the inverter voltage area 120, and is responsible for inverting the boosted voltage into AC power for grid connection or load power supply. The control signal sent by the first power control unit 111 to the first part is used to adjust the power conversion on the low-voltage side; the control signal sent by the second power control unit 121 to the second part is used to adjust the power conversion on the high-voltage side; the control logic and instructions transmitted between the first power control unit 111 and the second power control unit 121 are used to coordinate the power conversion of the two areas.

[0063] In some embodiments, the first power control unit 111 and the second power control unit 121 are both pre-installed with a safety protection program corresponding to the fault information data. The first power control unit 111 and the second power control unit 121 are used to execute the safety protection program after obtaining the fault information data. The first power control unit 111 is pre-installed with a safety protection program corresponding to the fault information data, and the second power control unit 121 is pre-installed with a safety protection program corresponding to the fault information data. When the first power control unit 111 or the second power control unit 121 detects the fault information data, it will immediately execute the pre-installed safety protection program and take corresponding protection measures according to the type of the fault information data, such as blocking the wave, disconnecting the power supply, etc., to ensure the safe operation of the system.

[0064] It is understandable that, through the pre-set safety protection program, the system can take protective measures immediately after detecting fault information data, thereby avoiding greater losses and improving system reliability. Specifically, the fault information data can be a 0 / 1 digital signal, such as fault, wave blocking, enable, etc. When emergency information such as a fault occurs in the corresponding area of ​​the first power control unit 111 or the second power control unit 121, the information will be immediately transmitted to the power control unit in the other area. After receiving the information, the other power control unit will synchronously take protective actions such as wave blocking.

[0065] In some embodiments, the present invention provides an isolated control system 100 for photovoltaic energy storage equipment. By providing a power conversion module 150 and implementing regional control and data communication between a first power control unit 111 and a second power control unit 121, the system's reliability and flexibility are effectively improved. This design not only simplifies the system structure but also ensures that protective measures can be quickly implemented in the event of a fault, ensuring safe system operation. Through pre-installed safety protection programs, the system can immediately implement protective measures upon detecting fault information data, further enhancing system security.

[0066] refer to Figure 7 , Figure 7 This is an optional structural diagram of an isolation chip provided in an isolation control system 100 of a photovoltaic energy storage device provided by an embodiment of the present invention; in some embodiments, the input voltage region 110 is further provided with a first isolation chip 160, and the power devices in the input voltage region 110 send preset type of communication data to the power devices in the inverter voltage region 120 through the first isolation chip 160, and the inverter voltage region 120 is further provided with a second isolation chip 170, and the power devices in the inverter voltage region 120 send preset type of communication data to the power devices in the input voltage region 110 through the second isolation chip 170.

[0067] Among them, the first isolation chip 160 and the first isolation chip 170 are respectively arranged in the input voltage area 110 and the inverter voltage area 120, and are used to obtain preset types of communication data from the power devices in the input voltage area 110 or the inverter voltage area 120, and transmit preset types of communication data between the power devices in these two areas. It can be understood that since this application involves cross-regional system control, the power control units in the high and low voltage areas use isolated communication for system control. On this basis, a small number of isolation chips can also be used to separately transmit preset types of communication data such as PWM waves, voltage, and current to improve the overall performance of the product.

[0068] In some embodiments, the isolation chip can achieve electrical isolation through components such as optocouplers and transformers to ensure electrical safety between high and low voltage areas, ensure reliable data transmission through multiple communication protocols, and realize bidirectional data transmission between power devices in the input voltage area 110 and the inverter voltage area 120, thereby ensuring the safety and reliability of the system while also improving the performance of the system through the isolation chip.

[0069] In some embodiments, a first power control unit 111 is communicatively connected to power devices in an input voltage region 110, and a second power control unit 121 is communicatively connected to power devices in an inverter voltage region 120. The first power control unit 111 and the second power control unit 121 are respectively used to send digital signals to corresponding power devices and obtain analog signals from power devices. The first power control unit 111 is arranged in the input voltage region 110, is communicatively connected to power devices in the input voltage region 110, sends digital signals to power devices in the input voltage region 110 for controlling power conversion, and obtains analog signals, such as voltage, current, temperature, etc., from power devices in the input voltage region 110 for monitoring and control calculations; the second power control unit 121 is arranged in the inverter voltage region 120, is communicatively connected to power devices in the inverter voltage region 120, sends digital signals to power devices in the inverter voltage region 120 for controlling power conversion, and obtains analog signals, such as voltage, current, temperature, etc., from power devices in the inverter voltage region 120 for monitoring and control calculations.

[0070] In the second aspect, an embodiment of the present invention provides a photovoltaic energy storage device, including an isolation control system of the photovoltaic energy storage device of any embodiment of the first aspect, wherein a photovoltaic energy storage device is provided according to an embodiment of the present invention, which has at least the following beneficial effects: since the photovoltaic energy storage device includes the isolation control system of the photovoltaic energy storage device of any embodiment of the first aspect, the isolation control system can respectively set the first power control unit and the second power control unit in the input voltage area and the inverter voltage area of ​​the power device, so that the first power control unit and the second power control unit can respectively control the power devices in their respective areas, so that only a first isolation communication group needs to be set between the first power control unit and the second power control unit. components, so that the first power control unit and the second power control unit communicate data through the first isolation communication component, and transmit communication information related to the power devices, so as to realize the control of the power conversion of the high and low voltage areas by the isolation control system; it can be understood that since the power devices in the input voltage area and the inverter voltage area do not need to be isolated from the corresponding power control units, the demand for the use of multiple analog isolation and digital isolation devices can be reduced, thereby effectively simplifying the structure and reducing costs; and the first power control unit and the second power control unit communicate in isolation, and the solution of controlling the input voltage area and the inverter voltage area respectively has lower performance requirements for a single power control unit, which can reduce the use cost of high-performance power control units and further reduce costs.

[0071] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An isolation control system for photovoltaic energy storage equipment, characterized in that: include: A first power control unit is provided in the input voltage region of the photovoltaic energy storage device and is used to perform power control in the input voltage region; A second power control unit is arranged in the inverter voltage region of the photovoltaic energy storage device, and is used to perform power control in the inverter voltage region; the voltage of the input voltage region is lower than the voltage of the inverter voltage region, and a first isolation communication component is provided between the first power control unit and the second power control unit, and the first power control unit and the second power control unit perform data communication through the first isolation communication component to transmit communication information.

2. The isolation control system of photovoltaic energy storage equipment according to claim 1, characterized in that: Also includes: A third power control unit, a second isolation communication component is arranged between the third power control unit and the first power control unit or the second power control unit, and the third power control unit communicates data with the first power control unit or the second power control unit through the second isolation communication component to perform human-computer interaction functions.

3. The isolation control system of photovoltaic energy storage equipment according to claim 1, characterized in that: The communication information includes multiple different types of communication data, and the first power control unit and the second power control unit both store the sending priorities of the multiple different types of communication data.

4. The isolation control system of photovoltaic energy storage equipment according to claim 3, characterized in that: The communication information includes electrical parameter data, control information data and fault information data. The sending priority of the electrical parameter data is lower than the sending priority of the control information data, and the sending priority of the control information data is lower than the sending priority of the fault information data.

5. The isolation control system of photovoltaic energy storage equipment according to claim 4, characterized in that: The first power control unit is used to transmit the electrical parameter data of the input voltage area and the inverter voltage area to the connected host computer after obtaining the electrical parameter data of the inverter voltage area transmitted by the second power control unit; or, the second power control unit is used to transmit the electrical parameter data of the input voltage area and the inverter voltage area to the connected host computer after obtaining the electrical parameter data of the input voltage area transmitted by the first power control unit.

6. The isolation control system of photovoltaic energy storage equipment according to claim 4, characterized in that: The system further includes a power conversion module, the power conversion module including a first portion located in the input voltage region and a second portion located in the inverter voltage region; The first power control unit is used to send a first control sampling signal to the first part and send the control information data to the second power control unit, so that the second power control unit sends a second control sampling signal to the second part; or, the second power control unit is used to send a second control sampling signal to the second part and send the control information data to the first power control unit, so that the first power control unit sends the first control sampling signal to the first part.

7. The isolation control system of photovoltaic energy storage equipment according to claim 4, characterized in that: The first power control unit and the second power control unit are both pre-installed with a safety protection program corresponding to the fault information data. The first power control unit and the second power control unit are used to execute the safety protection program after obtaining the fault information data.

8. The isolation control system for photovoltaic energy storage equipment according to any one of claims 1 to 7, characterized in that: The input voltage region is also provided with a first isolation chip, and the power devices in the input voltage region send preset type of communication data to the power devices in the inverter voltage region through the first isolation chip. The inverter voltage region is also provided with a second isolation chip, and the power devices in the inverter voltage region send preset type of communication data to the power devices in the input voltage region through the second isolation chip.

9. The isolation control system of photovoltaic energy storage equipment according to claim 1, characterized in that: The first power control unit is communicatively connected to the power devices in the input voltage region, and the second power control unit is communicatively connected to the power devices in the inverter voltage region. The first power control unit and the second power control unit are respectively used to send digital signals to the corresponding power devices and obtain analog signals from the power devices.

10. A photovoltaic energy storage device, characterized in that: An isolation control system comprising the photovoltaic energy storage device according to any one of claims 1 to 9.

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