Power device, protective charging control method and light storage air conditioning system

Abstract

The invention discloses a power device, a protective charging control method and a light storage air conditioning system. The power device comprises a photovoltaic panel, an energy storage battery and a load, the photovoltaic panel is connected with a direct current bus through a first current converter, the energy storage battery is connected with the direct current bus through a second current converter, the load is connected with the direct current bus through a third current converter, and the power device further comprises a direct connection branch arranged between the photovoltaic panel and the energy storage battery. The photovoltaic panel is directly connected with the energy storage battery; the multi-port energy router is used for acquiring the residual capacity of the energy storage battery, and controlling the charging mode of the energy storage battery according to the residual capacity of the energy storage battery when the residual capacity of the energy storage battery is not higher than a protection threshold value; wherein the charging mode comprises a direct charging mode and a bus charging mode; and then the photovoltaic panel is controlled to charge the energy storage battery. According to the invention, loss caused by electric energy flowing through the converter can be avoided, the charging power is ensured, and the charging speed is improved.

Description

Technical Field

[0001] The present invention relates to the field of electronic power technology, and in particular to a power device, a protective charging control method and a photovoltaic storage air conditioning system. Background Art

[0002] Photovoltaic storage air conditioning systems are widely used in various scenarios. Photovoltaic storage air conditioning systems used in harsh environments such as islands, plateaus, and remote mountainous areas may face the problem of no power grid or long-term power outages. The long-term operation of the photovoltaic storage air conditioning system under off-grid conditions will cause the energy storage battery in the photovoltaic storage air conditioning to be over-discharged. During the charging process of the power device, photovoltaics need to charge the energy storage battery through a two-stage inverter. Since the electric energy will generate power loss after passing through the two-stage inverter, the charging power of the energy storage battery will be insufficient.

[0003] In the process of charging power devices in the prior art, photovoltaics need to charge energy storage batteries through a two-stage converter. Since power loss will occur after the power passes through the two-stage converter, the energy storage battery will have insufficient charging power. No effective solution has been proposed so far. Summary of the invention

[0004] The embodiments of the present invention provide an electric power device, a protective charging control method and a photovoltaic storage air conditioning system to solve the problem in the prior art that when the electric power device is off-grid, there is a conflict between the power consumption of the load and the energy storage battery, which causes the energy storage battery to be in a very low power state for a long time, causing damage to the energy storage battery.

[0005] In order to solve the above technical problems, the present invention provides an electric power device, comprising a photovoltaic panel, an energy storage battery and a load, wherein the photovoltaic panel is connected to a DC bus through a first converter, the energy storage battery is connected to the DC bus through a second converter, and the load is connected to the DC bus through a third converter. The electric power device also includes:

[0006] A direct connection branch, arranged between the photovoltaic panel and the energy storage battery, for directly connecting the photovoltaic panel and the energy storage battery;

[0007] A multi-port energy router is used to obtain the remaining capacity of the energy storage battery, and when the remaining capacity of the energy storage battery is not higher than a protection threshold, control the charging mode of the energy storage battery according to the remaining capacity of the energy storage battery; wherein the charging mode includes a direct charging mode and a bus charging mode; and then control the photovoltaic panel to charge the energy storage battery.

[0008] Furthermore, the electric power device also includes: a first switch, which is arranged on the direct-connection branch.

[0009] Furthermore, the electric power device also includes: a unidirectional diode, which is arranged on the direct-connected branch, the anode of the unidirectional diode is connected to the photovoltaic panel, and the cathode of the unidirectional diode is connected to the energy storage battery.

[0010] Furthermore, the load at least includes: an AC load and a DC load, the AC load is connected to the DC bus through a DC / AC converter; the DC load is connected to the DC bus through a DC / DC converter.

[0011] Furthermore, the power device further comprises: a grid interface, wherein the grid interface is connected to the DC bus through a second switch and an AC / DC converter in sequence.

[0012] The present invention also provides a solar energy storage air conditioning system, comprising the above-mentioned electric power device.

[0013] The present invention further provides a protective charging control method, which is applied to the above-mentioned power device, and is characterized in that the protective charging control method comprises:

[0014] Detecting the remaining capacity of the energy storage battery;

[0015] When the remaining capacity of the energy storage battery is not higher than the protection threshold, the charging mode of the energy storage battery is controlled according to the remaining capacity of the energy storage battery; wherein the charging mode includes a direct charging mode and a bus charging mode;

[0016] Then the photovoltaic panel is controlled to charge the energy storage battery.

[0017] Further, controlling the charging mode of the energy storage battery according to the remaining capacity of the energy storage battery includes:

[0018] Determining the interval of the remaining capacity of the energy storage battery;

[0019] If the remaining capacity of the energy storage battery is less than or equal to a first threshold, controlling the charging mode of the energy storage battery to switch to a direct charging mode;

[0020] If the remaining capacity of the energy storage battery is greater than the first threshold and less than or equal to the protection threshold, the charging mode of the energy storage battery is controlled to switch to a bus charging mode.

[0021] Furthermore, controlling the charging mode of the energy storage battery to switch to a direct charging mode includes: controlling the first switch to be turned on, and controlling the first converter, the second converter and the third converter to be turned off; wherein the first switch is arranged on a direct branch between the photovoltaic panel and the energy storage battery.

[0022] Furthermore, controlling the charging mode of the energy storage battery to switch to a bus charging mode includes: controlling the first switch to be disconnected, controlling the first converter, the second converter, and the third converter to be turned on, and then controlling the power consumption of the load according to the power generation power of the photovoltaic panel and the power consumption of the load.

[0023] Further, controlling the power consumption of the load according to the power generation power of the photovoltaic panel and the power consumption of the load includes:

[0024] Determining whether the power generated by the photovoltaic panel is greater than the power consumed by the load;

[0025] If yes, the power consumption of the load is controlled to remain unchanged;

[0026] If not, the power consumption of the load is controlled to decrease.

[0027] Furthermore, the method further comprises:

[0028] Determining whether the remaining capacity of the energy storage battery is greater than the protection threshold;

[0029] If yes, the energy storage battery is controlled to quit charging.

[0030] The present invention also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the protective charging control method is implemented.

[0031] The present invention also provides an electronic device, comprising:

[0032] one or more processors;

[0033] A storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned protective charging control method.

[0034] By applying the technical solution of the present invention, a direct connection branch is set between the photovoltaic panel and the energy storage battery, so that the photovoltaic panel and the energy storage battery are directly connected. When the remaining capacity of the energy storage battery is not higher than the protection threshold, the multi-port energy router controls the charging mode of the energy storage battery to be a direct charging mode or a bus charging mode according to the remaining capacity of the energy storage battery, and then controls the photovoltaic panel to charge the energy storage battery. It can ensure that when the remaining capacity of the energy storage battery is low, the photovoltaic panel and the energy storage battery are directly connected to charge, thereby avoiding loss caused by electric energy flowing through the inverter, ensuring the charging power, and improving the charging speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a structural diagram of an electric power device according to an embodiment of the present invention;

[0036] Figure 2 is a flow chart of a protective charging control method according to an embodiment of the present invention;

[0037] Figure 3 is a flow chart of a protective charging control method according to another embodiment of the present invention;

[0038] Figure 4 FIG. 4 is a schematic diagram of the hardware structure of the electronic device according to the present embodiment. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0041] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] It should be understood that, although the terms first, second, third, etc. may be used to describe the converters in the embodiments of the present invention, the converters should not be limited to these terms. These terms are only used to distinguish different converters. For example, without departing from the scope of the embodiments of the present invention, the first converter may also be referred to as the second converter, and similarly, the second converter may also be referred to as the first converter.

[0043] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0044] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0045] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] Example 1

[0047] Photovoltaic storage air conditioning systems are widely used in various scenarios. Photovoltaic storage air conditioning systems used in harsh environments such as islands, plateaus, and remote mountainous areas may face the problem of no power grid or long-term power outages. The long-term operation of the photovoltaic storage air conditioning system under off-grid conditions will cause the energy storage battery in the photovoltaic storage air conditioning to be over-discharged. After the energy storage battery is over-discharged, the remaining capacity is not higher than the protection threshold (for example, 10%). The energy storage battery needs to be charged to make its remaining capacity higher than the protection threshold, that is, protective charging. In the process of protective charging of the power device, photovoltaics need to charge the energy storage battery through a two-stage converter. Since the electric energy will generate power loss after passing through the two-stage converter, the problem of insufficient charging power of the energy storage battery will occur.

[0048] In view of the problem that in the charging process of the power device in the prior art, the photovoltaic needs to charge the energy storage battery through a two-stage converter, and the energy storage battery will be insufficiently charged due to the power loss after the electric energy passes through the two-stage converter. Figure 1 is a structural diagram of an electric power device according to an embodiment of the present invention, such as Figure 1 As shown, the power device includes a photovoltaic panel 1, an energy storage battery 2 and a load 3, the photovoltaic panel is connected to the DC bus through a first converter, the energy storage battery is connected to the DC bus through a second converter, the first converter and the second converter are both DC / DC converters, and the load is connected to the DC bus through a third converter. The power device also includes: a direct branch 4, which is arranged between the photovoltaic panel and the energy storage battery, and is used to directly connect the photovoltaic panel and the energy storage battery; a multi-port energy router, which is used to obtain the remaining capacity of the energy storage battery, and when the remaining capacity of the energy storage battery is not higher than the protection threshold, the charging mode of the energy storage battery is controlled according to the remaining capacity of the energy storage battery; wherein the charging mode includes a direct charging mode and a bus charging mode; and then the photovoltaic panel is controlled to charge the energy storage battery.

[0049] When the remaining capacity of the energy storage battery is not higher than the protection threshold, the energy storage battery needs to be charged. If the remaining capacity of the energy storage battery is low, the energy storage battery needs to be charged as soon as possible. Figure 1 As shown, the photovoltaic panel is connected to the DC bus through the first converter, and the energy storage battery is connected to the DC bus through the second converter. If charging is performed through the DC bus, the electric energy needs to flow through at least the first converter and the second converter to charge the energy storage battery. After flowing through the first converter and the second converter, the electric energy will be lost a lot, resulting in insufficient charging power of the energy storage battery and inability to charge quickly. At this time, it is necessary to control the energy storage battery to be directly connected to the photovoltaic panel to avoid electric energy loss; if the remaining capacity of the energy storage battery is high, the energy storage battery can be charged at a slower speed, so it can be charged through the DC bus. At this time, the electric energy of the photovoltaic panel is transmitted to the DC bus through the first converter, and then transmitted to the energy storage battery through the DC bus through the second converter.

[0050] In the electric power device of this embodiment, a direct connection branch 4 is set between the photovoltaic panel and the energy storage battery, so that the photovoltaic panel and the energy storage battery are directly connected. When the remaining capacity of the energy storage battery is not higher than the protection threshold, the multi-port energy router 5 controls the charging mode of the energy storage battery to be the direct charging mode or the bus charging mode according to the remaining capacity of the energy storage battery 2, and then controls the photovoltaic panel 1 to charge the energy storage battery 2. It can ensure that when the remaining capacity of the energy storage battery 2 is low, the photovoltaic panel 1 and the energy storage battery 2 are directly connected to charge, thereby avoiding the loss caused by the flow of electric energy through the inverter, ensuring the charging power, and improving the charging speed.

[0051] In order to switch the connection relationship between the photovoltaic panel and the energy storage battery, the above-mentioned power device also includes: a first switch K1, which is arranged on the above-mentioned direct connection branch.

[0052] In this embodiment, the direct connection branch 4 is composed of two lines, namely a first line and a second line. The first switch K1 is a double-pole double-throw switch, and the double poles are respectively arranged on the first line and the second line.

[0053] In order to prevent electric energy from flowing from the energy storage battery to the photovoltaic panel, causing electric energy backflow, the above-mentioned power device also includes: a unidirectional diode D1, which is arranged on the direct branch, the anode of the unidirectional diode D1 is connected to the photovoltaic panel 1, and the cathode of the unidirectional diode D1 is connected to the energy storage battery 2, so as to control the electric energy to flow only from the photovoltaic panel 1 to the energy storage battery 2.

[0054] In one embodiment of the present invention, the load includes at least: an AC load 31 and a DC load 32, the AC load 31 is connected to the DC bus through a DC / AC converter; the DC load 32 is connected to the DC bus through a DC / DC converter, and the AC load includes the air conditioner motor M and other AC loads.

[0055] In order to realize multi-source power supply, the above power device further comprises: a grid interface 6, which is connected to the DC bus through the second switch K2 and the AC / DC converter in sequence.

[0056] Example 2

[0057] This embodiment provides a photovoltaic air conditioning system, including the power device of the above embodiment, which is used to charge the energy storage battery by directly connecting the photovoltaic panel and the energy storage battery when the remaining capacity of the energy storage battery is low, so as to avoid the loss caused by the flow of electric energy through the inverter, ensure the charging power, and improve the charging speed.

[0058] Example 3

[0059] This embodiment provides a protective charging control method, which is applied to the power device of the above embodiment. Figure 2 is a flow chart of a protective charging control method according to an embodiment of the present invention. Figure 2 As shown, the protective charging control method includes:

[0060] S101, obtaining the remaining capacity of the energy storage battery.

[0061] In specific implementation, information collection and monitoring scheduling are completed through a multi-port energy router, and the remaining capacity of the energy storage battery is obtained through the multi-port energy router.

[0062] S102, when the remaining capacity of the energy storage battery is not higher than the protection threshold, controlling the charging mode of the energy storage battery according to the remaining capacity of the energy storage battery; wherein the charging mode includes a direct charging mode and a bus charging mode.

[0063] When the remaining capacity of the energy storage battery is not higher than the protection threshold, the energy storage battery needs to be charged. If the remaining capacity of the energy storage battery is low, the energy storage battery needs to be charged as soon as possible. Figure 1 As shown, the photovoltaic panel is connected to the DC bus through the first converter, and the energy storage battery is connected to the DC bus through the second converter. If charging is performed through the DC bus, the electric energy needs to flow through at least the first converter and the second converter to charge the energy storage battery. After flowing through the first converter and the second converter, the electric energy will be lost a lot, resulting in insufficient charging power of the energy storage battery and inability to charge quickly. At this time, it is necessary to control the energy storage battery to be directly connected to the photovoltaic panel to avoid electric energy loss; if the remaining capacity of the energy storage battery is high, the energy storage battery can be charged at a slower speed, so it can be charged through the DC bus. At this time, the electric energy of the photovoltaic panel is transmitted to the DC bus through the first converter, and then transmitted to the energy storage battery through the DC bus through the second converter.

[0064] S103, controlling the photovoltaic panel to charge the energy storage battery.

[0065] The protective charging control method of this embodiment obtains the remaining capacity of the energy storage battery, and when the remaining capacity of the energy storage battery is not higher than the protection threshold, controls the charging mode of the energy storage battery according to the remaining capacity of the energy storage battery; wherein the charging mode includes a direct charging mode and a bus charging mode, and then controls the photovoltaic panel to charge the energy storage battery, so as to ensure that when the remaining capacity of the energy storage battery is low, the photovoltaic panel and the energy storage battery are directly connected to charge, so as to avoid loss caused by the flow of electric energy through the inverter, ensure the charging power, and improve the charging speed.

[0066] In order to ensure the accuracy of the switching timing of the charging mode, a first threshold is set, and the charging mode of the energy storage battery is controlled according to the remaining capacity of the energy storage battery, including: judging the interval in which the remaining capacity of the energy storage battery is located; if the remaining capacity of the energy storage battery is less than or equal to the first threshold, controlling the charging mode of the energy storage battery to switch to the direct charging mode; if the remaining capacity of the energy storage battery is greater than the first threshold and less than or equal to the protection threshold, controlling the charging mode of the energy storage battery to switch to the bus charging mode.

[0067] As mentioned above, in order to switch the connection relationship between the photovoltaic panel and the energy storage battery, the above-mentioned power device also includes: a first switch K1, which is arranged on the above-mentioned direct branch 4. Therefore, controlling the charging mode of the energy storage battery to switch to the direct charging mode includes: controlling the first switch to be turned on, and controlling the first converter, the second converter and the third converter to be turned off; wherein the first switch is arranged on the direct branch between the photovoltaic panel and the energy storage battery.

[0068] When the remaining capacity of the energy storage battery is high, the energy storage battery can be charged at a slower speed, so it can be charged through the DC bus. At this time, the electric energy of the photovoltaic panel is transmitted to the DC bus through the first converter, and then transmitted to the energy storage battery through the DC bus through the second converter. At the same time, in order to ensure the operation of the load, it is also necessary to control the converter between the load and the DC bus. Therefore, the charging mode of the energy storage battery is controlled to switch to the bus charging mode, including: controlling the first switch to be disconnected, controlling the first converter, the second converter, and the third converter to be turned on, in order to ensure the charging power under the premise of load operation, the load power consumption is controlled according to the power generation power of the photovoltaic panel and the power consumption of the load. Specifically, the load power consumption is controlled according to the power generation power of the photovoltaic panel and the power consumption of the load, including: judging whether the power generation power of the photovoltaic panel is greater than the power consumption of the load; if so, the load power consumption is controlled to remain unchanged, and the energy storage battery is charged with the remaining power; if not, the load power consumption is controlled to be reduced.

[0069] The protection threshold is the minimum remaining capacity to ensure that the energy storage battery is not damaged. When the remaining capacity is higher than the protection threshold, the risk of damage to the energy storage battery is low. In order to ensure the operation of the load, protective charging can be exited. Therefore, the above method also includes: determining whether the remaining capacity of the energy storage battery is greater than the protection threshold; if so, controlling the energy storage battery to exit protective charging.

[0070] Example 4

[0071] This embodiment provides another protective charging control method. Figure 3 FIG. 1 is a flow chart of a protective charging control method according to another embodiment of the present invention. Figure 3 As shown, the method includes:

[0072] S1, collects the remaining capacity SOC of the energy storage battery, the power Pmotor of the air-conditioning motor, the power Pdcload of the DC load, the power Psolar of the photovoltaic power generation, and the power Pacload of other AC loads through the multi-port energy router.

[0073] Among them, if there are multiple DC loads, the DC load power Pdcload is the sum of the powers of the multiple DC loads, and other AC loads are other AC loads except the air-conditioning motor. If there are multiple other AC loads, the other AC load power Pacload is the sum of the powers of the multiple other AC loads.

[0074] S2, determine whether SOC≤5% is established; if yes, execute step S3; if no, repeat step S2.

[0075] S3, controlling the first switch K1 provided on the direct connection branch between the photovoltaic panel and the energy storage battery to be turned on, and controlling the first converter, the second converter, and the third converter to stop working.

[0076] S4, determine whether 5<SOC≤10% is established; if yes, execute step S5, if not, repeat step S4.

[0077] S5, controlling the first switch K1 to be disconnected, and controlling the first converter, the second converter, and the third converter to stop working.

[0078] S6, determine whether Psolar>Pmotor+Pdcload+Pacload is satisfied; if not, execute step S7; if yes, execute step S8.

[0079] S7, control Pmotor, Pdcload or Pacload to decrease until Psolar>Pmotor+Pdcload+Pacload, and then execute step S8.

[0080] S8. Determine whether SOC > 10% holds; if yes, execute step S9; if no, repeat step S8.

[0081] S9. Exit the protective charging operation.

[0082] In summary, at the beginning, the multi-port energy router respectively collects the power information of the DC / DC converter and the DC / AC converter, and summarizes the photovoltaic panel power generation power Psolar, the remaining capacity of the energy storage battery as SOC, the air conditioner power consumption Pmotor, the AC load power consumption Pacload, and the DC load power consumption Pdcload.

[0083] When the SOC of the energy storage battery ≤ 5%, it is considered that the battery capacity is too small and in a dangerous area, and the system should give priority to charging the energy storage battery; if the light condition is insufficient and the power generation power is too small at this time, there will be conversion losses of multiple DC / DC converters if charging is still carried out in the bus charging mode; therefore, in order to supply power to the energy storage battery as soon as possible, the DC / DC converter and the DC / AC converter will be controlled to stop working, K1 will be closed, and the photovoltaic panel and the energy storage battery will be directly connected, and all the photovoltaic panel power generation power Psolar will be used to charge the energy storage battery.

[0084] Judge that when the energy storage battery has been charged for a certain period of time and 5% < SOC ≤ 10%, it is considered that it has left the dangerous area, but there is still a certain risk; so at this time, K1 can be disconnected, and the DC / DC converter and the DC / AC converter can be controlled to work normally.

[0085] Judge whether Psolar > Pmotor + Pacload + Pdcload; if yes, it means that the energy storage battery can continue to be charged without scheduling; if not, it means that the power generation power is insufficient, and the energy storage will still discharge to meet the missing power. Therefore, in order to continue charging the energy storage battery, the DC / DC converter and the DC / AC converter will actively reduce the electric powers of the air conditioner motor, other AC loads, and DC loads, so that Pmotor + Pacload + Pdcload < Psolar, ensuring that there is excess power to charge the energy storage battery.

[0086] When the SOC of the energy storage battery > 10%, the protective charging control process ends. The limit values (%) and conditions set in the present invention are only for illustrative purposes, and in actual applications, not only the above-described situations, but all similar situations are applicable.

[0087] This embodiment simultaneously monitors the power generation power of the photovoltaic panel, the remaining capacity of the energy storage battery, and the power consumption of each load in real time; through the system control and scheduling of the multi-port energy router, the problem of slow charging efficiency of the energy storage battery after over-discharge is handled, the charging of the energy storage battery is given priority, the service life of the energy storage battery is extended, and the effect of stable operation of the system is achieved.

[0088] Example 5

[0089] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the protective charging control method of the above embodiment is implemented.

[0090] Example 6

[0091] This embodiment provides an electronic device, including:

[0092] one or more processors;

[0093] A storage device is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the protective charging control method of the above embodiment.

[0094] Figure 4 FIG. 1 is a schematic diagram of the hardware structure of the electronic device according to this embodiment. Figure 4 As shown, the device includes:

[0095] One or more processors 410 and memory 420, Figure 4 A processor 410 is taken as an example.

[0096] The electronic device may further include: an input device 430 and an output device 440 .

[0097] The processor 410, the memory 420, the input device 430 and the output device 440 may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0098] The memory 420 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the protective charging control method in the embodiment of the present invention. The processor 410 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 420, that is, implementing the above method embodiment.

[0099] The memory 420 may include a program storage area and a data storage area, wherein the program storage area may store an application required for operating the device and at least one function; the data storage area may store data created according to the use of the protective charging control method, etc. In addition, the memory 420 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0100] The input device 430 can receive input digital or character information and generate key signal input related to user settings and function control of the electronic device. The output device 440 can include a display device such as a display screen.

[0101] The one or more modules are stored in the memory 420 , and when executed by the one or more processors 410 , the protective charging control method in any of the above method embodiments is executed.

[0102] The electronic device product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0103] The electronic device of the embodiment of the present invention exists in various forms, including but not limited to:

[0104] (1) Mobile communication devices: These devices are characterized by their mobile communication functions and their main purpose is to provide voice and data communications. These terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.

[0105] (2) Ultra-mobile personal computer devices: These devices fall into the category of personal computers, have computing and processing capabilities, and generally also have mobile Internet access features. These terminals include: PDA, MID and UMPC devices, such as iPad.

[0106] (3) Portable entertainment devices: These devices can display and play multimedia content. They include audio and video players (such as iPods), handheld game consoles, e-books, smart toys, and portable car navigation devices.

[0107] (4) Server: A device that provides computing services. The server consists of a processor, hard disk, memory, device bus, etc. The server is similar to a general computer architecture, but because it needs to provide highly reliable services, it has higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0108] (5) Other electronic devices with data interaction functions, such as televisions, large-screen cars, etc.

[0109] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0110] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric power device, comprising a photovoltaic panel, an energy storage battery and a load, wherein the photovoltaic panel is connected to a DC bus through a first converter, the energy storage battery is connected to the DC bus through a second converter, and the load is connected to the DC bus through a third converter, characterized in that: The electric device further comprises: A direct connection branch, arranged between the photovoltaic panel and the energy storage battery, for directly connecting the photovoltaic panel and the energy storage battery; A multi-port energy router is used to obtain the remaining capacity of the energy storage battery, and when the remaining capacity of the energy storage battery is not higher than a protection threshold, control the charging mode of the energy storage battery according to the remaining capacity of the energy storage battery; wherein the charging mode includes a direct charging mode and a bus charging mode; and then control the photovoltaic panel to charge the energy storage battery.

2. The electric power device according to claim 1, characterized in that: The electric device further comprises: The first switch is arranged on the direct connection branch.

3. The electric power device according to claim 1, characterized in that: The electric device further comprises: A unidirectional diode is arranged on the direct-connected branch, the anode of the unidirectional diode is connected to the photovoltaic panel, and the cathode of the unidirectional diode is connected to the energy storage battery.

4. The electric power device according to claim 1, characterized in that: The load at least includes: An AC load and a DC load, wherein the AC load is connected to the DC bus via a DC / AC converter; and the DC load is connected to the DC bus via a DC / DC converter.

5. The electric power device according to claim 1, characterized in that: The electric device further comprises: A power grid interface, wherein the power grid interface is connected to the DC bus through a second switch and an AC / DC converter in sequence.

6. A solar energy storage air conditioning system, characterized in that: An electric power device comprising any one of claims 1 to 5.

7. A protective charging control method, applied to the power device according to any one of claims 1 to 5, characterized in that: The protective charging control method comprises: Detecting the remaining capacity of the energy storage battery; When the remaining capacity of the energy storage battery is not higher than the protection threshold, the charging mode of the energy storage battery is controlled according to the remaining capacity of the energy storage battery; wherein the charging mode includes a direct charging mode and a bus charging mode; Then the photovoltaic panel is controlled to charge the energy storage battery.

8. The method according to claim 7, characterized in that Controlling a charging mode of the energy storage battery according to the remaining capacity of the energy storage battery includes: Determining the interval of the remaining capacity of the energy storage battery; If the remaining capacity of the energy storage battery is less than or equal to a first threshold, controlling the charging mode of the energy storage battery to switch to a direct charging mode; If the remaining capacity of the energy storage battery is greater than the first threshold and less than or equal to the protection threshold, the charging mode of the energy storage battery is controlled to switch to a bus charging mode.

9. The method according to claim 8, characterized in that Controlling the charging mode of the energy storage battery to switch to a direct charging mode includes: Controlling the first switch to be turned on, and controlling the first converter, the second converter, and the third converter to be turned off; Wherein, the first switch is arranged on a direct branch between the photovoltaic panel and the energy storage battery.

10. The method according to claim 8, characterized in that Controlling the charging mode of the energy storage battery to switch to a bus charging mode includes: The first switch is controlled to be disconnected, and the first converter, the second converter, and the third converter are controlled to be turned on, and then the power consumption of the load is controlled according to the power generation power of the photovoltaic panel and the power consumption of the load.

11. The method according to claim 10, characterized in that Controlling the power consumption of the load according to the power generation power of the photovoltaic panel and the power consumption of the load comprises: Determining whether the power generated by the photovoltaic panel is greater than the power consumed by the load; If yes, the power consumption of the load is controlled to remain unchanged; If not, the power consumption of the load is controlled to decrease.

12. The method according to claim 7, characterized in that The method further comprises: Determining whether the remaining capacity of the energy storage battery is greater than the protection threshold; If yes, the energy storage battery is controlled to quit charging.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 7 to 12 is implemented.

14. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the method as claimed in any one of claims 7 to 12.

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