A high-gain high-power charging device, its control method and terminal device

Abstract

The present application relates to a high-gain high-power charging device, its control method and a terminal device. The method includes obtaining the power supply information of a power source; outputting power according to the power supply information, and obtaining the output current of the main power supply module; comparing the output current with a reference current to obtain a comparison result; selecting a slow-charging power supply circuit or a three-phase fast-charging power supply circuit according to the comparison result to supply power to a load and charge an energy storage power supply module; when there is no power output according to the power supply information, using the energy storage power supply module to supply power to the load. By comparing the output current of the main power supply module with the reference current, the slow-charging power supply circuit or the three-phase fast-charging power supply circuit is selected to supply power to the load and the energy storage power supply module, thereby changing the load output size and making the power supply circuit highly flexible; by using the three-phase fast-charging power supply circuit to supply power to the energy storage power supply module and the load for fast charging, high-gain high-power fast charging is achieved. This charging device has a high voltage gain and power transmission, meeting the requirements of high power.

Description

Technical Field

[0001] The present application relates to the technical field of charging, and particularly to a high-gain high-power charging device, a control method thereof, and a terminal device. Background Art

[0002] The topology of traditional power electronic converters is fixed, and the voltage gain is limited by the form of the topology. The voltage gain can be changed by adjusting parameters such as the duty cycle. Due to high gain, the topology of traditional power electronic converters cannot meet the requirement of high power. The working scenarios of existing charging piles are complex and the requirements are diverse, and the traditional topology of power electronic converters cannot meet them.

[0003] The voltage gain of traditional power electronic converters is limited by their topology and it is difficult to meet the occasions that require high gain. The flexibility of traditional power electronic converters is low and it is difficult to meet the requirements under complex working conditions. With the market demand, the application scenarios of charging piles require high power, while traditional power electronic converters cannot meet the requirement of high power due to high gain. Summary of the Invention

[0004] Embodiments of the present application provide a high-gain high-power charging device, a control method thereof, and a terminal device, which are used to solve the technical problem that the converter topology applied to existing charging piles cannot meet the requirement of high power due to high gain.

[0005] To achieve the above object, the embodiments of the present application provide the following technical solutions:

[0006] On the one hand, a control method of a high-gain high-power charging device is provided, which is applied to a high-gain high-power charging device. The high-gain high-power charging device includes a power supply, a main power supply module connected to the power supply, and a drive control module, a power supply selection module, an energy storage power supply module, and a load connected to the output end of the main power supply module. The main power supply module includes a slow charging power supply circuit and a three-phase fast charging power supply circuit. The control method includes the following steps:

[0007] Obtain the power supply information of the power supply, where the power supply information includes power supply output and no power supply output;

[0008] When the power supply information is power supply output, obtain the output current of the main power supply module; compare the output current with a reference current to obtain a comparison result, where the reference current is one-tenth of the energy storage capacity of the energy storage power supply module;

[0009] Select the slow charging power supply circuit or the three-phase fast charging power supply circuit according to the comparison result to supply power to the load and charge the energy storage power supply module;

[0010] When there is no power output according to the power supply information, the energy storage power supply module is used to supply power to the load.

[0011] Preferably, the control method of the high-gain high-power charging device includes: if the slow charge power supply circuit is selected to supply power to the load and charge the energy storage power supply module according to the comparison result, obtain the first switching duty ratio of the slow charge power supply circuit, and calculate according to the first switching duty ratio using the first voltage gain calculation formula to obtain the voltage gain of the slow charge power supply circuit. The first voltage gain calculation formula is: G1 = 1 / (1 - d2), where G1 is the voltage gain of the slow charge power supply circuit and d2 is the first switching duty ratio.

[0012] Preferably, the control method of the high-gain high-power charging device includes: if the three-phase fast charge power supply circuit is selected to supply power to the load and charge the energy storage power supply module according to the comparison result, obtain the second switching duty ratio and the coupling turns ratio of the three-phase fast charge power supply circuit, and calculate according to the second switching duty ratio and the coupling turns ratio using the second voltage gain calculation formula to obtain the voltage gain of the three-phase fast charge power supply circuit. The second voltage gain calculation formula is:

[0013] G2 = (d1 + Nd1) / (1 - d1), where G2 is the voltage gain of the three-phase fast charge power supply circuit, d1 is the second switching duty ratio, and N is the coupling turns ratio.

[0014] On the other hand, a high-gain high-power charging device is provided, including a power supply, a main power supply module, a drive control module, a power supply selection module, an energy storage power supply module, a load, and a main control module for controlling the operation of the main power supply module, the drive control module, the power supply selection module, and the energy storage power supply module. The main power supply module includes a slow charge power supply circuit and a three-phase fast charge power supply circuit;

[0015] The power supply is used to provide power to the main power supply module;

[0016] The main power supply module is used to supply power to the load and charge the energy storage power supply module through the slow charge power supply circuit or the three-phase fast charge power supply circuit;

[0017] The power supply selection module is used to select the slow charge power supply circuit or the three-phase fast charge power supply circuit to supply power to the load and charge the energy storage power supply module according to the current output by the main power supply module;

[0018] The drive control module is used to control the corresponding slow charge power supply circuit or three-phase fast charge power supply circuit to conduct to supply power to the load and charge the energy storage power supply module according to the power supply circuit selected by the power supply selection module;

[0019] The energy storage power supply module is used to supply power to the load when the power supply does not provide power.

[0020] The main control module supplies power to the load according to the control method of the high-gain high-power charging device described above.

[0021] Preferably, the main power supply module includes a first switching element, a second switching element, a buffer switching tube, and three single-phase fast charging sub-modules with the same topological structure. The single-phase fast charging sub-module includes a fast charging switching tube and a coupling inductor connected to the fast charging switching tube. The first end of the first switching element is connected to the positive pole of the power supply. The second end of the first switching element is connected to the second end of the second switching element through a buffer inductor and a buffer semiconductor element. The third end of the first switching element is connected to the first end of the fast charging switching tube. The second end of the fast charging switching tube is connected to the third end of the second switching element through a fast charging capacitor and a fast charging inductor. The first end of the second switching element is respectively connected to the drive control module, the power supply selection module, the energy storage power supply module, and the load. The output end of the coupling inductor, the drive control module, the energy storage power supply module, and the load are respectively connected to the negative pole of the power supply. The first end of the buffer switching tube is connected to the second end of the buffer inductor. The second end of the buffer switching tube is connected to the negative pole of the power supply. The first end of the buffer inductor is connected to the second end of the first switching element.

[0022] Preferably, the power supply selection module includes a comparison sub-module. The comparison sub-module is used to compare the output current of the main power supply module with a reference current. If the output current is less than the reference current, the comparison sub-module outputs a high-level signal for controlling the operation of the first switching element and the second switching element. The drive control module is used to obtain a first switching duty ratio for controlling the conduction of the buffer switching tube according to the output voltage of the main power supply module. Then, the power supply charges the energy storage power supply module and supplies power to the load through the slow charging power supply circuit. Among them, the reference current is one-tenth of the energy storage capacity of the energy storage power supply module.

[0023] Preferably, the slow charging power supply circuit is composed of the first switching element, the buffer inductor, the buffer semiconductor element, and the second switching element. The first ends and the second ends of the first switching element and the second switching element are conductively connected. The buffer switching tube conducts according to the first switching duty ratio.

[0024] Preferably, if the output current is greater than the reference current, the comparator sub-module outputs a low-level signal for controlling the operation of the first switching element and the second switching element. The drive control module is used to obtain a second switching duty ratio for controlling the conduction of the fast charging switch tube according to the output voltage of the main power supply module. Then, the power supply charges the energy storage power supply module and supplies power to the load through the fast charging power supply circuit. Wherein, the reference current is one-tenth of the energy storage capacity of the energy storage power supply module.

[0025] Preferably, the fast charging power supply circuit is composed of the first switching element, the second switching element, and three single-phase fast charging sub-modules with the same topological structure. The first ends of the first switching element and the second switching element are both conductively connected to their third ends. The three single-phase fast charging sub-modules with the same topological structure are respectively an A-phase fast charging sub-module, a B-phase fast charging sub-module, and a C-phase fast charging sub-module. If the A-phase fast charging sub-module drives the corresponding fast charging switch tube to conduct according to the second switching duty ratio, the B-phase fast charging sub-module drives the corresponding fast charging switch tube to conduct according to the second switching duty ratio after delaying the phase angle by 120 degrees, and the C-phase fast charging sub-module drives the corresponding fast charging switch tube to conduct according to the second switching duty ratio after delaying the phase angle by 240 degrees.

[0026] On the other hand, a terminal device is provided, including a processor and a memory;

[0027] The memory is used to store program code and transmit the program code to the processor;

[0028] The processor is used to execute the control method of the high-gain high-power charging device according to the instructions in the program code.

[0029] The high-gain high-power charging device, its control method and terminal device. The method is applied to the high-gain high-power charging device. The high-gain high-power charging device includes a power supply, a main power supply module connected to the power supply, and a drive control module, a power supply selection module, an energy storage power supply module and a load connected to the output end of the main power supply module. The main power supply module includes a slow charging power supply circuit and a three-phase fast charging power supply circuit. The control method includes obtaining the power supply information of the power supply, where the power supply information includes power output and no power output of the power supply; when the power supply information is power output, obtaining the output current of the main power supply module; comparing the output current with a reference current to obtain a comparison result, and the reference current is one-tenth of the energy storage capacity of the energy storage power supply module; according to the comparison result, selecting the slow charging power supply circuit or the three-phase fast charging power supply circuit to supply power to the load and charge the energy storage power supply module; when the power supply information is no power output, using the energy storage power supply module to supply power to the load. From the above technical solutions, it can be seen that the embodiments of the present application have the following advantages: The control method of the high-gain high-power charging device compares the output current of the main power supply module with one-tenth of the energy storage capacity of the energy storage power supply module, and selects the slow charging power supply circuit or the three-phase fast charging power supply circuit with different topological structures to supply power to the load and the energy storage power supply module, so as to flexibly adjust the topological structure of the high-gain high-power charging device according to different working conditions, thereby changing the load output size, making the power supply circuit have high flexibility; by using the three-phase fast charging power supply circuit to supply power to the energy storage power supply module and the load for fast charging, high-gain high-power fast charging is realized, so that the high-gain high-power charging device has high voltage gain and power transmission, meets the requirements of high power, and solves the technical problem that the converter topological structure applied to the charging pile in the prior art cannot meet the requirements of high power due to high gain. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a flowchart of the steps of the control method of the high-gain high-power charging device described in the embodiments of the present application;

[0032] Figure 2 It is a schematic diagram of the topological structure of the high-gain high-power charging device described in the embodiments of the present application;

[0033] Figure 3 It is a schematic diagram of the topological structure of the energy storage power supply module power supply in the high-gain high-power charging device described in the embodiments of the present application;

[0034] Figure 4 Schematic diagram of the topology structure of the slow charging power supply circuit selected for the high-gain high-power charging device described in the embodiments of the present application;

[0035] Figure 5 Schematic diagram of the topology structure of the fast charging power supply circuit selected for the high-gain high-power charging device described in the embodiments of the present application;

[0036] Figure 6 Schematic diagram of the framework of the terminal device described in the embodiments of the present application. Detailed implementation manners

[0037] In order to make the invention objectives, features, and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0038] In the description of the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0039] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0040] The embodiments of the present application provide a high-gain high-power charging device, its control method, and a terminal device, which solve the technical problem that the converter topology structure applied to the charging pile in the prior art cannot meet the high-power requirement due to high gain. In this embodiment, the high-gain high-power charging device, its control method, and the terminal device are illustrated by taking an electric vehicle charging pile as an example.

[0041] Embodiment 1:

[0042] Figure 1The flowchart of the steps of the control method for the high-gain high-power charging device according to the embodiments of the present application Figure 2 The schematic diagram of the topology structure of the high-gain high-power charging device according to the embodiments of the present application Figure 3 The schematic diagram of the topology structure of the energy storage power supply module in the high-gain high-power charging device according to the embodiments of the present application

[0043] As Figure 1 shown, the embodiments of the present application provide a control method for a high-gain high-power charging device, which is applied to a high-gain high-power charging device.

[0044] As Figure 2 shown, the high-gain high-power charging device includes a power supply V in , a main power supply module 10 connected to the power supply V in , a drive control module 20, a power supply selection module 30, an energy storage power supply module 40, and a load 50 connected to the output end of the main power supply module 10. The main power supply module 10 includes a slow charge power supply circuit and a three-phase fast charge power supply circuit.

[0045] The control method of the high-gain high-power charging device includes the following steps:

[0046] S1. Obtain the power supply information of the power supply. The power supply information includes power output of the power supply and no power output of the power supply.

[0047] It should be noted that in step S1, obtaining whether the power supply of the high-gain high-power charging device has power output facilitates the high-gain high-power charging device to select which power supply entity to supply power. In this embodiment, the high-gain high-power charging device can select different power supply circuits according to requirements.

[0048] S2. When the power supply information is that there is power output, obtain the output current of the main power supply module; compare the output current with a reference current to obtain a comparison result. The reference current is one-tenth of the energy storage capacity of the energy storage power supply module.

[0049] It should be noted that in step S2, when there is power supply to the load 50 according to step S1, the output current I0 and output voltage V0 output by the main power supply module 10 are obtained. Then, in the power supply selection module 30, the output current is compared with the reference current, and the comparison result is output; in the drive control module 20, a PWM pulse signal for controlling the conduction of the switching tubes in the slow charge power supply circuit and the three-phase fast charge power supply circuit is output according to the comparison between the output voltage and the reference voltage. In this embodiment, the reference voltage can be set according to requirements and is not specifically limited here. Among them, the control method of the high-gain high-power charging device can compare the output current of the main power supply module with one-tenth of the energy storage capacity of the energy storage power supply module, select the topological structure of different power supply circuits, and switch to small-current charging when large-current charging is not required, reducing the power loss of the power supply circuit.

[0050] S3. Select the slow charge power supply circuit or the three-phase fast charge power supply circuit to supply power to the load and charge the energy storage power supply module according to the comparison result.

[0051] It should be noted that in step S3, the slow charge power supply circuit or the three-phase fast charge power supply circuit is selected to supply power to the load and charge the energy storage power supply module according to the comparison result obtained in step S2. In this embodiment, if the comparison result is that the output current is less than the reference current, the slow charge power supply circuit is selected to supply power to the load 50 and charge the energy storage power supply module 40; if the comparison result is that the output current is greater than the reference current, the three-phase fast charge power supply circuit is selected to supply power to the load 50 and charge the energy storage power supply module 40. In this embodiment, the control method of the high-gain high-power charging device can select different power supply circuits through the slow charge power supply circuit and the three-phase fast charge power supply circuit of the main power supply module, so as to flexibly adjust the topological structure of the high-gain high-power charging device according to different working conditions, thereby changing the load output size, making the power supply circuit highly flexible; it also enables the high-gain high-power charging device to have the working topologies of two charging circuits, and can adjust the topological structure of the high-gain high-power charging device according to the energy storage capacity of the energy storage power supply module 40, thereby changing the charging mode and having a wide voltage range.

[0052] S4. When there is no power output according to the power supply information, use the energy storage power supply module to supply power to the load.

[0053] It should be noted that as Figure 3 shown, the control method of the high-gain high-power charging device can enable the high-gain high-power charging device to use the energy storage power supply module to ensure normal power supply to the load under complex working conditions such as the failure of the main power supply module, improving the reliability and operation stability of the high-gain high-power charging device.

[0054] In an embodiment of the present application, the control method of the high-gain high-power charging device uses a three-phase fast-charging power supply circuit to quickly charge the energy storage power supply module 40, realizing high-gain high-power fast charging of the energy storage power supply module 40, so that the high-gain high-power charging device has a high voltage gain and power transmission.

[0055] A control method of a high-gain high-power charging device provided by the present application. This method is applied to a high-gain high-power charging device, which includes a power supply, a main power supply module connected to the power supply, and a drive control module, a power supply selection module, an energy storage power supply module, and a load connected to the output end of the main power supply module. The main power supply module includes a slow-charging power supply circuit and a three-phase fast-charging power supply circuit. The control method includes obtaining the power supply information of the power supply, where the power supply information includes power supply output and no power supply output; when the power supply information is power supply output, obtaining the output current of the main power supply module; comparing the output current with a reference current to obtain a comparison result, and the reference current is one-tenth of the energy storage capacity of the energy storage power supply module; selecting a slow-charging power supply circuit or a three-phase fast-charging power supply circuit to supply power to the load and charge the energy storage power supply module according to the comparison result; when the power supply information is no power supply output, using the energy storage power supply module to supply power to the load. The control method of the high-gain high-power charging device compares the output current of the main power supply module with one-tenth of the energy storage capacity of the energy storage power supply module, and selects a slow-charging power supply circuit or a three-phase fast-charging power supply circuit with different topological structures to supply power to the load and the energy storage power supply module, realizing that the topological structure of the high-gain high-power charging device can be flexibly adjusted according to different working conditions, thereby changing the load output size, making the power supply circuit have high flexibility; through the three-phase fast-charging power supply circuit to supply power to the energy storage power supply module and the load for fast charging, realizing high-gain high-power fast charging, so that the high-gain high-power charging device has a high voltage gain and power transmission, meeting the requirements of high power, and solving the technical problem that the converter topological structure applied to the charging pile in the prior art cannot meet the requirements of high power due to high gain.

[0056] In an embodiment of the present application, the control method of the high-gain high-power charging device includes: if a slow-charging power supply circuit is selected to supply power to the load and charge the energy storage power supply module according to the comparison result, obtaining the first switch duty ratio of the slow-charging power supply circuit, and calculating according to the first switch duty ratio using the first voltage gain calculation formula to obtain the voltage gain of the slow-charging power supply circuit. The first voltage gain calculation formula is: G1 = 1 / (1 - d2), where G1 is the voltage gain of the slow-charging power supply circuit and d2 is the first switch duty ratio.

[0057] In an embodiment of the present application, the control method of the high-gain high-power charging device includes: if the three-phase fast charging power supply circuit is selected to supply power to the load and charge the energy storage power supply module according to the comparison result, obtain the second switching duty ratio and the coupling turns ratio of the three-phase fast charging power supply circuit, and calculate according to the second switching duty ratio and the coupling turns ratio using the second voltage gain calculation formula to obtain the voltage gain of the three-phase fast charging power supply circuit. The second voltage gain calculation formula is: G2 = (d1 + Nd1) / (1 - d1), where G2 is the voltage gain of the three-phase fast charging power supply circuit, d1 is the second switching duty ratio, and N is the coupling turns ratio.

[0058] Embodiment 2:

[0059] As Figure 2 shown, an embodiment of the present application provides a high-gain high-power charging device, including a power supply V in , a main power supply module 10, a drive control module 20, a power supply selection module 30, an energy storage power supply module 40, a load 50, and a main control module for controlling the operation of the main power supply module 10, the drive control module 20, the power supply selection module 30, and the energy storage power supply module 40. The main power supply module 10 includes a slow charging power supply circuit and a three-phase fast charging power supply circuit;

[0060] The power supply V in is used to supply power to the main power supply module 1;

[0061] The main power supply module 10 is used to supply power to the load 50 and charge the energy storage power supply module 40 through the slow charging power supply circuit or the three-phase fast charging power supply circuit;

[0062] The power supply selection module 20 is used to select whether to use the slow charging power supply circuit or the three-phase fast charging power supply circuit to supply power to the load 50 and charge the energy storage power supply module 40 according to the current output by the main power supply module 10;

[0063] The drive control module 30 is used to control the corresponding slow charging power supply circuit or three-phase fast charging power supply circuit to conduct to supply power to the load 50 and charge the energy storage power supply module 40 according to the power supply circuit selected by the power supply selection module 20;

[0064] The energy storage power supply module 40 is used to supply power to the load 50 when the power supply V in does not provide power;

[0065] The main control module supplies power to the load according to the control method of the high-gain high-power charging device described above.

[0066] It should be noted that the content of the control method of the high-gain high-power charging device has been elaborated in detail in Embodiment 1, and the content of the control method of the high-gain high-power charging device will not be described again in this embodiment. In this embodiment, the main power supply module 10 of the high-gain high-power charging device includes a slow-charging power supply circuit and a three-phase fast-charging power supply circuit with different topological structures, so that the high-gain high-power charging device has a wide voltage range. Among them, the main power supply module 10 forms a slow-charging power supply circuit and a three-phase fast-charging power supply circuit with different topological structures through interleaved parallel technology, which can reduce the stress of the devices of the high-gain high-power charging device, realize fast charging of high-gain large current for the energy storage power supply module 40, and make the high-gain high-power charging device have a high voltage gain and power transmission.

[0067] In an embodiment of the present application, as Figure 2 shown, the main power supply module 10 includes a first switching element K1, a second switching element K2, a buffer switching tube S2, and three single-phase fast-charging sub-modules with the same topological structure. The single-phase fast-charging sub-module includes a fast-charging switching tube S 11 and a coupling inductor L connected to the fast-charging switching tube S 11 The first end of the first switching element K1 is connected to the positive pole of the power supply V in , the second end of the first switching element K1 is connected to the second end of the second switching element K2 through a buffer inductor L2 and a buffer semiconductor element D4, the third end of the first switching element K1 is connected to the first end of the fast-charging switching tube S 11 , the second end of the fast-charging switching tube S 11 is connected to the second end of the second switching element K2 through a fast-charging capacitor C 11 and a fast-charging inductor L 31 , the first end of the second switching element K2 is respectively connected to the drive control module 30, the power supply selection module 20, the energy storage power supply module 40, and the load 50, the output end of the coupling inductor L, the drive control module 30, the energy storage power supply module 40, and the load 50 are respectively connected to the negative pole of the power supply V in , the first end of the buffer switching tube S2 is connected to the second end of the buffer inductor L2, the second end of the buffer switching tube S2 is connected to the negative pole of the power supply V in , and the first end of the buffer inductor L2 is connected to the second end of the first switching element K1.

[0068] It should be noted that both the buffer switching tube S2 and the fast-charging switching tube S 11 are MOS tubes, triodes or IGBT tubes; if both the buffer switching tube S2 and the fast-charging switching tube S 11 are MOS tubes, the drain of the MOS tube is used as the first end of the switching tube, and the source of the MOS tube is used as the second end of the switching tube; if both the buffer switching tube S2 and the fast-charging switching tube S 11They are all triodes or IGBT tubes. The collector of the triode or IGBT tube serves as the first end of the switching tube, and the emitter of the triode or IGBT tube serves as the second end of the switching tube. The buffer semiconductor elements D4 are all diodes. The anode of the diode serves as the first end of the buffer semiconductor element D4, and the cathode of the diode serves as the second end of the buffer semiconductor element D4. In this embodiment, the first switching element K1 and the second switching element K2 can both be relays or mechanical selection switches that achieve the same function.

[0069] Figure 4 It is a schematic diagram of the topological structure of the slow charge power supply circuit selected for the high-gain high-power charging device described in the embodiments of the present application.

[0070] As Figure 4 shown, in an embodiment of the present application, the power supply selection module 30 includes a comparison sub-module. The comparison sub-module is used to compare the output current of the main power supply module 10 with a reference current. If the output current is less than the reference current, the comparison sub-module outputs a high-level signal for controlling the operation of the first switching element K1 and the second switching element K2. The drive control module 20 is used to obtain a first switching duty ratio for controlling the conduction of the buffer switching tube according to the output voltage of the main power supply module 10. Then the power supply V in charges the energy storage power supply module 40 and supplies power to the load 50 through the slow charge power supply circuit. Among them, the reference current is one-tenth of the energy storage capacity of the energy storage power supply module. The slow charge power supply circuit is composed of a first switching element K1, a buffer inductor L2, a buffer semiconductor element D4, and a second switching element K2. The first ends and the second ends of the first switching element K1 and the second switching element K2 are conductively connected, and the buffer switching tube S2 conducts according to the first switching duty ratio.

[0071] It should be noted that the comparison sub-module includes a comparator. As Figure 4 shown, when I o < I ref the comparison sub-module compares and outputs a low-level signal 0 through the comparator, obtains two high-level signals 11 through the NOT gate, and controls the actions of the first switching element K1 and the second switching element K2, so that the first switching element K1 is connected to one end of the buffer inductor L2 branch, and the second switching element K2 is connected to the cathode of the buffer semiconductor element D4. Then the high-gain high-power charging device selects the slow charge power supply circuit. At this time, the voltage gain of the high-gain high-power charging device is G1 = 1 / (1 - d2). The power supply V in inputs and charges the energy storage power supply module 40 and supplies power to the load 50 through the slow charge power supply circuit. The drive control module 30 generates a duty ratio signal through the voltage error signal processing and PWM link of the main control circuit therein, and drives the buffer switching tube S2 according to the duty ratio signal to increase the working stability of the slow charge power supply circuit.

[0072] Figure 5 Schematic diagram of the topology structure of the fast charging power supply circuit selected for the high-gain high-power charging device described in the embodiments of the present application.

[0073] As Figure 5 shown, in an embodiment of the present application, if the output current is greater than the reference current, the comparison sub-module outputs a low-level signal for controlling the operation of the first switching element K1 and the second switching element K2, and the drive control module 30 is used to obtain the control fast charging switch tube S according to the output voltage of the main power supply module 10 11 The on-time of the second switching duty cycle is such that the power supply charges the energy storage power supply module 40 and supplies power to the load 50 through the fast charging power supply circuit; wherein, the reference current is one-tenth of the energy storage capacity of the energy storage power supply module. The fast charging power supply circuit is composed of a first switching element K1, a second switching element K2, and three single-phase fast charging sub-modules with the same topology structure. The first ends of the first switching element K1 and the second switching element K2 are both conductively connected to their third ends; the three single-phase fast charging sub-modules with the same topology structure are the A-phase fast charging sub-module, the B-phase fast charging sub-module, and the C-phase fast charging sub-module respectively. If the A-phase fast charging sub-module drives the corresponding fast charging switch tube S according to the second switching duty cycle 11 to conduct, the B-phase fast charging sub-module drives the corresponding fast charging switch tube S according to the second switching duty cycle after delaying the phase angle by 120 degrees 12 to conduct, and the C-phase fast charging sub-module drives the corresponding fast charging switch tube S according to the second switching duty cycle after delaying the phase angle by 240 degrees 13 to conduct.

[0074] It should be noted that, as Figure 5 shown, when I ref < I o , where the value of Iref2 is C / 10, the comparison sub-module compares and outputs a high-level signal 0 through a comparator, obtains two low-level signals 00 through an inverter, and controls the actions of the first switching element K1 and the second switching element K2. The first switching element K1 is connected to the parallel point of the first ends of the fast charging switch tubes of three single-phase fast charging sub-modules with the same interleaved parallel topology structure, and the second switching element K2 is connected to the output end of each single-phase fast charging sub-module; for the fast charging power supply circuit selected by this high-gain high-power charging device, as Figure 5 shown, at this time, the voltage gain of this high-gain high-power charging device is G2 = (d1 + Nd1) / (1 - d1). The high-gain high-power charging device can achieve high-gain and large-current output through the fast charging power supply circuit, meet the requirements of high power, and realize the fast charging of the energy storage power supply module 40. The power supply V in is input and charges the energy storage power supply module 40 through the fast charging power supply circuit and supplies power to the load 50. The drive control module 30 generates a duty cycle signal through the voltage error signal processing and PWM link of the main control circuit therein, and drives the corresponding fast charging switch tube S according to the duty cycle signal according to the second switching duty cycle11 Turn on, delay the duty cycle signal by 120°, and drive the corresponding fast charging switch tube S according to the second switch duty cycle 12 Turn on, delay the duty cycle signal by 240°, and drive the corresponding fast charging switch tube S according to the second switch duty cycle 13 Turn on.

[0075] In the embodiment of the present application, the high-gain high-power charging device can prevent excessive circuit loss through the slow charging power supply circuit, and switch to small current charging when large current charging is not required. The high-gain high-power charging device realizes high-gain high-current high-power transmission through the fast charging power supply circuit: selects the topology of the fast charging power supply circuit according to the storage capacity of the energy storage power supply module to meet the fast charging requirements, and at the same time reduces the current stress of the device.

[0076] Embodiment 3:

[0077] Figure 6 It is a schematic diagram of the framework of the terminal device described in the embodiment of the present application.

[0078] As Figure 6 shown, the embodiment of the present application provides a terminal device, including a processor and a memory;

[0079] The memory is used to store program codes and transmit the program codes to the processor;

[0080] The processor is used to execute the control method of the above-mentioned high-gain high-power charging device according to the instructions in the program code.

[0081] It should be noted that the processor is used to execute the steps in the above-mentioned control method embodiment of a high-gain high-power charging device according to the instructions in the program code. Alternatively, when the processor executes the computer program, it realizes the functions of each module / unit in the above-mentioned system / device embodiments.

[0082] Exemplarily, the computer program can be divided into one or more modules / units. One or more modules / units are stored in the memory and executed by the processor to complete the present application. One or more modules / units can be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device.

[0083] The terminal device can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that it does not constitute a limitation to the terminal device, and may include more or fewer components than shown in the figure, or combine some components, or different components. For example, the terminal device may also include input / output devices, network access devices, buses, etc.

[0084] The so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0085] The memory may be an internal storage unit of the terminal device, such as the hard disk or memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk equipped on the terminal device, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory may also include both the internal storage unit and the external storage device of the terminal device. The memory is used to store computer programs and other programs and data required by the terminal device. The memory may also be used to temporarily store data that has been output or is to be output.

[0086] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0087] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other may be through some interfaces, and the indirect couplings or communication connections of the devices or units may be in electrical, mechanical, or other forms.

[0088] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0089] In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0090] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that makes a contribution to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0091] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

Claims

1. A control method for a high-gain high-power charging device, applied to a high-gain high-power charging device, characterized in that The high-gain high-power charging device includes a power supply, a main power supply module connected to the power supply, and a drive control module, a power supply selection module, an energy storage power supply module, and a load connected to the output end of the main power supply module. The main power supply module includes a slow charge power supply circuit and a three-phase fast charge power supply circuit. The control method includes the following steps: Obtain the power supply information of the power supply, where the power supply information includes power output and no power output; When the power supply information indicates power output, obtain the output current of the main power supply module; compare the output current with a reference current to obtain a comparison result. The reference current is one-tenth of the energy storage capacity of the energy storage power supply module; According to the comparison result, select the slow charge power supply circuit or the three-phase fast charge power supply circuit to supply power to the load and charge the energy storage power supply module; When the power supply information indicates no power output, use the energy storage power supply module to supply power to the load; If the comparison result is that the output current is less than the reference current, select the slow charge power supply circuit to supply power to the load and charge the energy storage power supply module; if the comparison result is that the output current is greater than the reference current, select the three-phase fast charge power supply circuit to supply power to the load and charge the energy storage power supply module; If the three-phase fast charge power supply circuit is selected to supply power to the load and charge the energy storage power supply module according to the comparison result, obtain the second switch duty ratio and the coupling turns ratio of the three-phase fast charge power supply circuit, and calculate according to the second switch duty ratio and the coupling turns ratio using the second voltage gain calculation formula to obtain the voltage gain of the three-phase fast charge power supply circuit. The second voltage gain calculation formula is: G2 = (d1 + Nd1) / (1 - d1), where G2 is the voltage gain of the three-phase fast charge power supply circuit, d1 is the second switch duty ratio, and N is the coupling turns ratio; The fast charge power supply circuit is composed of a first switch element, a second switch element, and three single-phase fast charge sub-modules with the same topological structure. The single-phase fast charge sub-module includes a fast charge switch tube and a coupling inductor connected to the fast charge switch tube. The first ends of the first switch element and the second switch element are both conductively connected to their third ends; the three single-phase fast charge sub-modules with the same topological structure are respectively a phase A fast charge sub-module, a phase B fast charge sub-module, and a phase C fast charge sub-module. If the phase A fast charge sub-module drives the corresponding fast charge switch tube to conduct according to the second switch duty ratio, the phase B fast charge sub-module drives the corresponding fast charge switch tube to conduct with a phase delay of 120 degrees according to the second switch duty ratio, and the phase C fast charge sub-module drives the corresponding fast charge switch tube to conduct with a phase delay of 240 degrees according to the second switch duty ratio.

2. The control method of the high-gain high-power charging device according to claim 1, wherein Including: If the buffer power supply circuit is selected according to the comparison result to supply power to the load and charge the energy storage power supply module, the first switching duty ratio of the buffer power supply circuit is obtained, and according to the first switching duty ratio, it is calculated using the first voltage gain calculation formula to obtain the voltage gain of the buffer power supply circuit. The first voltage gain calculation formula is: G1 = 1 / (1 - d2), where G1 is the voltage gain of the buffer power supply circuit and d2 is the first switching duty ratio.

3. A high-gain high-power charging device, characterized in that, It includes a power supply, a main power supply module, a drive control module, a power supply selection module, an energy storage power supply module, a load, and a main control module that controls the operation of the main power supply module, the drive control module, the power supply selection module, and the energy storage power supply module. The main power supply module includes a buffer power supply circuit and a three-phase fast charge power supply circuit; The power supply is used to provide power to the main power supply module; The main power supply module is used to supply power to the load and charge the energy storage power supply module through the buffer power supply circuit or the three-phase fast charge power supply circuit; The power supply selection module is used to select whether to use the buffer power supply circuit or the three-phase fast charge power supply circuit to supply power to the load and charge the energy storage power supply module according to the current output by the main power supply module; The drive control module is used to control the corresponding buffer power supply circuit or three-phase fast charge power supply circuit to conduct to supply power to the load and charge the energy storage power supply module according to the power supply circuit selected by the power supply selection module; The energy storage power supply module is used to supply power to the load when the power supply does not provide power; The main control module supplies power to the load according to the control method of the high-gain high-power charging device as described in claim 1 or 2.

4. The high-gain high-power charging device according to claim 3, wherein, The main power supply module includes a first switching element, a second switching element, a buffer switching tube, and three single-phase fast charge sub-modules with the same topological structure. The single-phase fast charge sub-module includes a fast charge switching tube and a coupling inductor connected to the fast charge switching tube. The first end of the first switching element is connected to the positive pole of the power supply. The second end of the first switching element is connected to the second end of the second switching element through a buffer inductor and a buffer semiconductor element. The third end of the first switching element is connected to the first end of the fast charge switching tube. The second end of the fast charge switching tube is connected to the third end of the second switching element through a fast charge capacitor and a fast charge inductor. The first end of the second switching element is respectively connected to the drive control module, the power supply selection module, the energy storage power supply module, and the load. The output end of the coupling inductor, the drive control module, the energy storage power supply module, and the load are respectively connected to the negative pole of the power supply. The first end of the buffer switching tube is connected to the second end of the buffer inductor. The second end of the buffer switching tube is connected to the negative pole of the power supply. The first end of the buffer inductor is connected to the second end of the first switching element.

5. The high-gain high-power charging device according to claim 4, wherein, The power supply selection module includes a comparison sub-module, and the comparison sub-module is used to compare the output current of the main power supply module with a reference current; if the output current is less than the reference current, the comparison sub-module outputs a high-level signal for controlling the operation of the first switching element and the second switching element, and the drive control module is used to obtain a first switching duty ratio for controlling the conduction of the buffer switching transistor according to the output voltage of the main power supply module, then the power supply charges the energy storage power supply module and supplies power to the load through the buffer power supply circuit; wherein, the reference current is one-tenth of the energy storage capacity of the energy storage power supply module.

6. The high-gain high-power charging device according to claim 5, characterized in that The buffer power supply circuit is composed of the first switching element, the buffer inductor, the buffer semiconductor element and the second switching element. The first ends and the second ends of the first switching element and the second switching element are conductively connected, and the buffer switching transistor conducts according to the first switching duty ratio.

7. The high-gain high-power charging device according to claim 5, characterized in that If the output current is greater than the reference current, the comparison sub-module outputs a low-level signal for controlling the operation of the first switching element and the second switching element, and the drive control module is used to obtain a second switching duty ratio for controlling the conduction of the fast charge switching transistor according to the output voltage of the main power supply module, then the power supply charges the energy storage power supply module and supplies power to the load through the fast charge power supply circuit; wherein, the reference current is one-tenth of the energy storage capacity of the energy storage power supply module.

8. A terminal device, characterized in that It includes a processor and a memory; The memory is used to store program codes and transmit the program codes to the processor; The processor is used to execute the control method of the high-gain high-power charging device as described in Claim 1 or 2 according to the instructions in the program codes.

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