Distributed charging and series boosted circuit and high-voltage direct-current power supply system

Abstract

The utility model relates to the field of power supplies, and provides a distributed charging and series boosted circuit and a high-voltage direct-current power supply system. The boost circuit comprises a master control unit and a boost unit. The master control unit comprises a master control module. The boosting unit comprises a sub-control module and a power supply system, and the sub-control module and the master control module adopt optical communication transmission; the power supply system comprises a boost module and a charging module, the boost module comprises a battery pack, a diode and a transistor, the cathode of the battery pack is connected with the anode of the diode, the anode of the battery pack is connected with the first end of the transistor, and the second end of the transistor is connected with the cathode of the diode; a first end of a charger in the charging module is connected with a battery pack cathode through a contactor, and a second end is connected with a battery pack anode through another contactor; the second end of the transistor in one power system is connected with the cathode of the battery pack in the other power system. The booster circuit can solve the problems that a power supply system is insufficient in withstand voltage, cannot be effectively and quickly charged and is low in safety during standing.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a distributed charging and series-connected boost circuit and a high-voltage direct current power supply system. Background Art

[0002] In the existing vehicle power supply and other high-voltage power supply fields, in order to improve the charging and discharging efficiency, the DC power supply components (batteries, etc.) are generally connected in series to increase the corresponding voltage output. At present, most manufacturers in the vehicle field have developed a high-voltage DC power supply system of about 800V, but the electrical components that can meet the high-voltage DC power supply system are large in size, and some components have insufficient withstand voltage and are difficult to support higher voltage output; when designing a circuit, the designed circuit needs to meet the withstand voltage level of the entire circuit system.

[0003] At the same time, the maximum voltage of national standard DC charging piles is mostly around 1000V. The voltage of the DC power system is too high to be charged with national standard charging piles, and the charging efficiency is limited by the power of a charger during charging, so it cannot be charged more efficiently. Moreover, when the DC power system does not need to discharge externally or is at high voltage for a long time, it brings hidden dangers to the system and the safety of subsequent maintenance. Utility Model Content

[0004] The utility model provides a distributed charging and series-connected boost circuit and a high-voltage direct current power supply system. The distributed charging and series-connected boost circuit can solve the problems of insufficient voltage resistance, inability to effectively and quickly charge, and low safety when the high-voltage direct current power supply system is stationary.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] According to the first aspect of the utility model, a distributed charging and series boost circuit is provided, comprising a general control unit and a plurality of boost units, wherein the general control unit comprises at least one general control module; the boost unit comprises a sub-control module and a power supply system, wherein:

[0007] Optical communication is used between each of the sub-control modules and the main control module;

[0008] The power supply system includes a boost module and a charging module. The boost module includes a battery pack, a diode and a transistor for boosting the voltage level of the boost circuit. The negative electrode of the battery pack is connected to the anode of the diode, the positive electrode of the battery pack is connected to the first end of the transistor, the second end of the transistor is connected to the cathode of the diode, and the control end of the transistor is connected to the corresponding sub-control module. The charging module includes a charger and two contactors for distributed charging of the power supply system. The first end of the charger is connected to the negative electrode of the battery pack through one of the contactors, and the second end of the charger is connected to the positive electrode of the battery pack through the other contactor.

[0009] In the adjacent power supply systems, the second end of the transistor in one power supply system is connected to the negative electrode of the battery pack in another power supply system;

[0010] The boost circuit has a first connection end, a second connection end and a ground end, the first connection end is connected to the negative pole of the battery pack in the first power system, and the second connection end is connected to the positive pole of the battery pack in the last power system; and the boost module in the first power system is connected to the ground end through a control switch, and the control switches in adjacent power systems are connected.

[0011] According to a second aspect of the present invention, a high-voltage direct current power supply system is provided, and the high-voltage direct current power supply system includes a distributed charging and a series-connected boost circuit as provided by any technical solution in the first aspect above.

[0012] It should be noted that when the boost circuit provided in the present application discharges to the outside, the voltage level can be effectively increased. When the voltage resistance level between the power supply systems meets the total output voltage resistance level of the load, the voltage level increased by the series circuit can be 1 to N times that of the power supply system. The power supply system does not need to adopt a higher voltage resistance level to meet the system voltage resistance requirements, but only needs to meet its own voltage resistance level, and does not need to meet the voltage level of the circuit after series connection. This can solve the problem that the power supply system 220 needs to meet the system voltage resistance level when the voltage level of the entire circuit is too high during the circuit design implementation process.

[0013] At the same time, since optical communication is used between each sub-control module and the main control module in the boost circuit provided in this embodiment, the problem of insufficient withstand voltage of signal control can be solved when the boost circuit discharges to the outside.

[0014] When the boost circuit provided in the present application needs to be charged, multiple national standard chargers can be used for simultaneous charging, so that the boost circuit enters a distributed charging mode, improves charging efficiency, and meets the needs of fast and efficient charging.

[0015] When the boost circuit does not need to discharge externally or is at a higher voltage for a long time in static state, the voltage level of the boost circuit can be lowered through operation to reduce the impact of high voltage on the boost circuit in static state and improve the safety of subsequent equipment maintenance.

[0016] Accordingly, the distributed charging and series boost circuit provided in the present application can solve the problems of insufficient voltage resistance of the high-voltage DC power supply system, inability to charge effectively and quickly, and low safety when stationary. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0018] Figure 1 A simplified structural diagram of a boost circuit provided in an embodiment of the present application;

[0019] Figure 2 A circuit diagram of a boost circuit provided in an embodiment of the present application;

[0020] Figure 3 A circuit diagram of a boost circuit provided in an embodiment of the present application during a discharge process;

[0021] Figure 4 A circuit diagram of a boost circuit provided in an embodiment of the present application during a charging process;

[0022] Figure 5 A circuit diagram of a boost circuit in a steady state according to an embodiment of the present application.

[0023] The following are the descriptions of the reference numerals:

[0024] 100, main control module; 200, boost unit; 210, sub-control module; 220, power supply system. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0026] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0027] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0028] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0029] In a first aspect, an embodiment of the present application provides a distributed charging and series-connected boost circuit, which includes a master control unit and a plurality of boost units 200 . Figure 1 A simplified structural diagram of a boost circuit provided in an embodiment of the present application; Figure 2 The circuit diagram of the boost circuit provided in the embodiment of the present application is shown in FIG. Figure 1 and Figure 2 As shown, the overall control unit includes at least one overall control module 100; the boost unit 200 includes a sub-control module 210 and a power supply system 220. Optical communication is used between each sub-control module 210 and the overall control module 100. The number of boost units 200 can be set according to demand, and the boost unit 200 can be selectively connected to the entire boost circuit.

[0030] It should be understood that Figure 1 and Figure 2The total control module 100 is shown as one for example to simplify the circuit and improve the integration of the entire boost circuit. In addition, in order to clearly understand the boost circuit provided in the embodiment of the present application, different power systems 220 are shown with different serial numbers, such as power system 1, power system 2...power system N; the sub-control modules 210 in different power systems 220 are shown with different numbers, such as sub-control module 1, sub-control module 2...sub-control module N.

[0031] Please continue to refer to Figure 1 and Figure 2 In the structure shown, the power system 220 includes a boost module and a charging module. The boost module includes a battery pack, a diode and a transistor for boosting the voltage level of the boost circuit. The negative electrode of the battery pack is connected to the anode of the diode, the positive electrode of the battery pack is connected to the first end of the transistor, the second end of the transistor is connected to the cathode of the diode, and the control end of the transistor is connected to the corresponding sub-control module 210.

[0032] It can be understood that in order to clearly understand the boost circuit provided in the embodiment of the present application, the battery packs in different power systems 220 are shown with different numbers, such as battery pack 1, battery pack 2...battery pack N; similarly, the diodes in different power systems 220 are shown with different labels, such as D1, D2...DN; the transistors in different power systems 220 are shown with different labels, such as T1, T2...TN.

[0033] Taking the first power system 220 as an example, the cathode of the battery pack 1 is connected to the anode of the diode D1, the anode of the battery pack 1 is connected to the first end of the transistor T1, the second end of the transistor T1 is connected to the cathode of the diode D1, and the control end of the transistor T2 is connected to the corresponding sub-control module 1. It can be understood that when the battery pack 1 is turned on, no current flows through the diode D1, in order to block overcurrent.

[0034] Please continue to refer to Figure 2 In the structure shown, in adjacent power systems 220, the second end of the transistor in one power system 220 is connected to the negative electrode of the battery pack in another power system 220. Exemplarily, the second end of transistor T1 in power system 1 is connected to the negative electrode of battery pack 2 in power system 2.

[0035] Please continue to refer to Figure 1 and Figure 2 In the structure shown, the charging module includes a charger for distributed charging of the power system 220 and two contactors, the first end of the charger is connected to the negative electrode of the battery pack through one contactor, and the second end of the charger is connected to the positive electrode of the battery pack through another contactor. It can be understood that Figure 2Each contactor is shown as KM; the chargers in different power supply systems 220 are shown with different numbers, such as charger 1, charger 2... charger N.

[0036] Taking the power supply system 1 as an example, the charger 1 is connected to the first end of a contactor KM, and the second end of the contactor KM is connected to the negative pole of the battery pack 1; at the same time, the charger 2 is connected to the first end of another contactor KM, and the second end of the contactor KM is connected to the positive pole of the battery pack 1.

[0037] Please continue to refer to Figure 2 , the boost circuit has a first connection terminal, a second connection terminal and a ground terminal, and the first connection terminal and the second connection terminal are used to connect an external load. The first connection terminal is connected to the negative electrode of the battery pack 1 in the first power system 1, and the second connection terminal is connected to the positive electrode of the battery pack N in the last power system N; and the boost module in the first power system 1 is connected to the ground terminal through a control switch, and the control switches in the adjacent power systems 220 are connected. It can be understood that the identification of the control switches in different power systems 220 is different, and exemplary, it is shown as control switch K1, control switch K2...control switch KN.

[0038] It is worth noting that the boost circuit provided in the embodiment of the present application has a discharge process, a charging process and a steady-state process. Figure 2 The circuit diagram in the discharge process can be equivalent to Figure 3 ; Figure 2 The circuit diagram in the charging process can be equivalent to Figure 4 ; Figure 2 The circuit diagram in the steady state process can be equivalent to Figure 4 .

[0039] For details, please combine Figure 2 refer to Figure 3 In the discharge process, the boost circuit provided in the embodiment of the present application disconnects the control switch K1, the control switch K2 and the control switch KN respectively, disconnects all the contactors KM, and the main control module 100 sends a signal, which is received by the sub-control module 1, the sub-control module 2 and the sub-control module N, and the sub-control module 1, the sub-control module 2 and the sub-control module N control the transistor T1, the transistor T2 and the transistor TN to be turned on. It is worth noting that the order in which the sub-control module 1, the sub-control module 2 and the sub-control module N control the transistors can be freely controlled by the instructions issued by the sub-control module 210.

[0040] Accordingly, the series connection of battery pack 1, battery pack 2 and battery pack N in the boost circuit provided in the embodiment of the present application forms a series circuit, and the voltage is increased to increase the voltage of the boost circuit. The voltage at the power system 1 end is the positive and negative voltage of the power system 1, the voltage at the power system 2 end is the positive and negative voltage of the power system 2, and the voltage at the power system N end is the positive and negative voltage of the power system 220. The withstand voltage of each power system 220 meets its own withstand voltage level.

[0041] It should be noted that when the boost circuit provided in the embodiment of the present application discharges to the outside, the voltage level can be effectively improved. When the voltage resistance level of the power supply system 220 meets the total output voltage resistance level of the load, the voltage level increased by the series circuit can be 1 to N times that of the power supply system 220; the power supply system 220 does not need to adopt a higher voltage resistance level to meet the system voltage resistance requirements, but only needs to meet its own voltage resistance level, and does not need to meet the voltage level of the circuit after series connection. This can solve the problem that the power supply system 220 needs to meet the system voltage resistance level when the voltage level of the entire circuit is too high during the circuit design implementation process.

[0042] At the same time, since optical communication is used between each sub-control module 210 and the main control module 100 in the boost circuit provided in this embodiment, the problem of insufficient withstand voltage of signal control can be solved when the boost circuit discharges to the outside.

[0043] Please combine Figure 2 refer to Figure 4 In the charging process of the boost circuit provided in the embodiment of the present application, the main control module 100 sends a signal, which is received by the sub-control module 1, the sub-control module 2 and the sub-control module N, and the sub-control module 1, the sub-control module 2 and the sub-control module N control the transistor T1, the transistor T2 and the transistor TN to be disconnected (the sequence of the sub-control module 1, the sub-control module 2 and the sub-control module N controlling the transistors can be freely controlled by the instruction issued by the sub-control module 210), and respectively close the control switch K1, the control switch K2 and the control switch KN (there is no sequence), and respectively close each contactor KM (there is no sequence), so as to realize distributed simultaneous charging of multiple chargers.

[0044] It should be noted that when the boost circuit provided in the embodiment of the present application needs to be charged, multiple national standard chargers can be used for simultaneous charging, so that the boost circuit enters a distributed charging mode, improves charging efficiency, and meets the needs of fast and efficient charging.

[0045] Please combine Figure 2 refer to Figure 5In the static process of the boost circuit provided in the embodiment of the present application, the main control module 100 sends a signal, which is received by the sub-control module 1, the sub-control module 2 and the sub-control module N, and the sub-control module 1, the sub-control module 2 and the sub-control module N control the transistor T1, the transistor T2 and the transistor TN to be disconnected (the sequence of the sub-control module 1, the sub-control module 2 and the sub-control module N controlling the transistors can be freely controlled by the instruction issued by the sub-control module 210), and respectively close the control switch K1, the control switch K2 and the control switch KN (there is no sequence), and respectively disconnect each contactor KM (there is no sequence) to reduce the voltage of the system.

[0046] It should be noted that when the boost circuit does not need to discharge externally or is in a higher voltage for a long time in static state, the voltage level of the boost circuit can be lowered through the above operation, thereby reducing the impact of high voltage on the boost circuit in static state and improving the safety of subsequent equipment maintenance.

[0047] Accordingly, the distributed charging and series-connected boost circuits provided in the embodiments of the present application can solve the problems of insufficient voltage resistance of the high-voltage DC power supply system, inability to charge effectively and quickly, and low safety when stationary.

[0048] When specifically setting up the boost circuit provided in the embodiment of the present application, optical signal control can be used between the main control module 100 and the sub-control module 210; optical signal control or digital control can be used between the sub-control module 210 and the corresponding transistor; the opening / closing of the control switch is controlled by a separate control device, and similarly, the control end of the contactor can be controlled by a separate control device, which will not be described in detail here.

[0049] In one embodiment, the boost circuit provided in the embodiment of the present application also includes a resistor, the first end of the control switch is connected to the ground end, the second end of the control switch is connected to the first end of the resistor, and the second end of the resistor is connected to the negative electrode of the battery pack.

[0050] It should be noted that when a short circuit or other unexpected situation occurs in the boost circuit, the resistor can be used as a load to prevent excessive current from causing an accident. In other words, the boost circuit provided in the embodiment of the present application can improve safety performance by setting a resistor.

[0051] In one embodiment, the boost circuit provided in the embodiment of the present application also includes a fuse, a first end of the fuse is connected to the second end of the transistor in one power system 220 in the adjacent power system 220, and the second end of the fuse is connected to the negative pole of the battery pack in another power system 220 in the adjacent power system 220.

[0052] It should be noted that, in the present embodiment, a fuse is provided in the boost circuit to effectively cut off the circuit and protect the circuit when overcurrent occurs, thereby improving the safety and reliability of the boost circuit.

[0053] In one embodiment, the contactor is a DC side contactor.

[0054] It should be noted that a DC contactor is a device that can quickly and reliably switch electrical loads at high speeds. It achieves the switching function by generating an arc in a DC circuit and breaking the circuit at one or more mechanical contacts.

[0055] The DC contactor has the following advantages: 1. High-speed switching: The response time of the DC contactor is very fast, and the circuit can be connected and disconnected in milliseconds, which makes them very suitable for applications that require frequent switching of circuits in a short period of time, such as battery management, DC solenoid control, etc. 2. Long life: Since the mechanical contacts in the DC contactor do not wear out as frequently as the AC contactor during the switching process, the life of the DC contactor is much longer than that of the AC contactor under the same load, which is also one of the advantages of the DC contactor in high-frequency switching applications. 3. High reliability: There is no arc polarity inside the DC contactor, and the arc voltage generated during the switching process is very low, the arc is small and it is not easy to produce high-frequency oscillations, which leads to higher reliability of the DC contactor than the AC contactor and more stable output. 4. Low arc voltage: Due to the low arc voltage, when the DC contactor controls the high-voltage DC load, compared with the AC contactor, they have lower voltage loss, can reduce power loss, and are more efficient.

[0056] In one embodiment, the structures of the multiple sub-control modules 210 are the same to simplify the complexity of the boost circuit.

[0057] In one embodiment, the structures of the boost modules in adjacent power systems 220 are the same to simplify the complexity of the boost circuit.

[0058] In one embodiment, the structures of the charging modules in adjacent power systems 220 are the same to simplify the complexity of the boost circuit.

[0059] It is worth noting that the structure of the sub-control module 210 can be set to be the same as required, and / or the structure of the boost module in the adjacent power supply system 220 can be set to be the same, and / or the structure of the charging module in the adjacent power supply system 220 can be set to be the same, and the details will not be repeated.

[0060] As an example, the transistor may be an IGBT (Insulated Gate Bipolar Transistor) or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). Of course, the transistor may also be a triode, which will not be described in detail.

[0061] In one embodiment, the charger is an AC / DC conversion charger. AC-Alternating current means alternating current, DC-Direct current means direct current, and an AC / DC conversion charger is a device that converts alternating current into direct current. Its power flow can be bidirectional. The power flow from the power source to the load is called rectification, and the power flow from the load back to the power source is called active inversion.

[0062] As an example, the input terminal of the charger is used to connect to an AC380V power source.

[0063] In one embodiment, the main control module 100 is a control box; the sub-control module 210 is a control box.

[0064] It should be noted that by selecting a control box, the entire boost circuit can be simplified to reduce the difficulty of preparation.

[0065] In a second aspect, an embodiment of the present application provides a high-voltage direct current power supply system, which includes a distributed charging and a series-connected boost circuit as provided by any technical solution in the first aspect above.

[0066] It should be noted that when the embodiment of the present application provides a boost circuit in a high-voltage DC power supply system for external discharge, the voltage level can be effectively improved. When the withstand voltage level of the power supply system 220 meets the total output withstand voltage level of the load, the voltage level increased by the series circuit can be 1 to N times that of the power supply system 220; the power supply system 220 does not need to adopt a higher withstand voltage level to meet the system withstand voltage requirements, but only needs to meet its own withstand voltage level, and does not need to meet the voltage level of the circuit after series connection. This can solve the problem that the power supply system 220 needs to meet the system withstand voltage level when the voltage level of the entire circuit is too high during the circuit design implementation process.

[0067] At the same time, since optical communication is used between each sub-control module 210 and the main control module 100 in the boost circuit provided in this embodiment, the problem of insufficient withstand voltage of signal control can be solved when the boost circuit discharges to the outside.

[0068] When the boost circuit in the high-voltage DC power supply system provided in the embodiment of the present application needs to be charged, multiple national standard chargers can be used for simultaneous charging, so that the boost circuit enters a distributed charging mode, improves charging efficiency, and meets the needs of fast and efficient charging.

[0069] When the boost circuit does not need to discharge externally or is at a higher voltage for a long time in static state, the voltage level of the boost circuit can be lowered through operation to reduce the impact of high voltage on the boost circuit in static state and improve the safety of subsequent equipment maintenance.

[0070] Accordingly, the distributed charging and series-connected boost circuits provided in the embodiments of the present application can solve the problems of insufficient voltage resistance of the high-voltage DC power supply system, inability to charge effectively and quickly, and low safety when stationary.

[0071] Those skilled in the art will readily come up with other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variation, use or adaptation of the present utility model, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and example embodiments are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0072] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A distributed charging and series boost circuit, characterized in that: It includes a total control unit and a plurality of boost units, wherein the total control unit includes at least one total control module; the boost unit includes a sub-control module and a power supply system, wherein: Each of the sub-control modules and the main control module adopts optical communication transmission; The power supply system includes a boost module and a charging module. The boost module includes a battery pack, a diode and a transistor for boosting the voltage level of the boost circuit. The negative electrode of the battery pack is connected to the anode of the diode, the positive electrode of the battery pack is connected to the first end of the transistor, the second end of the transistor is connected to the cathode of the diode, and the control end of the transistor is connected to the corresponding sub-control module. The charging module includes a charger and two contactors for distributed charging of the power supply system. The first end of the charger is connected to the negative electrode of the battery pack through one of the contactors, and the second end of the charger is connected to the positive electrode of the battery pack through the other contactor. In the adjacent power supply systems, the second end of the transistor in one power supply system is connected to the negative electrode of the battery pack in another power supply system; The boost circuit has a first connection end, a second connection end and a ground end, the first connection end is connected to the negative pole of the battery pack in the first power system, and the second connection end is connected to the positive pole of the battery pack in the last power system; and the boost module in the first power system is connected to the ground end through a control switch, and the control switches in adjacent power systems are connected.

2. The distributed charging and series boost circuit according to claim 1, characterized in that: The boost circuit further includes a resistor, a first end of the control switch is connected to the ground end, a second end of the control switch is connected to a first end of the resistor, and a second end of the resistor is connected to the negative electrode of the battery pack.

3. The distributed charging and series boost circuit according to claim 1, characterized in that: The boost circuit also includes a fuse, a first end of the fuse is connected to the second end of a transistor in one of the adjacent power systems, and a second end of the fuse is connected to the negative electrode of a battery pack in another of the adjacent power systems.

4. The distributed charging and series boost circuit according to claim 1, characterized in that: The contactor is a DC end contactor.

5. The distributed charging and series boost circuit according to any one of claims 1 to 4, characterized in that: The structures of the multiple sub-control modules are the same.

6. The distributed charging and series boost circuit according to any one of claims 1 to 4, characterized in that: The boost modules in adjacent power supply systems have the same structure.

7. The distributed charging and series boost circuit according to any one of claims 1 to 4, characterized in that: The charging modules in adjacent power supply systems have the same structure.

8. The distributed charging and series boost circuit according to any one of claims 1 to 4, characterized in that: The transistor is an insulated gate bipolar transistor or a metal-oxide semiconductor field effect transistor.

9. The distributed charging and series boost circuit according to any one of claims 1 to 4, characterized in that: The charger is an AC / DC conversion charger.

10. The distributed charging and series boost circuit according to any one of claims 1 to 4, characterized in that: The main control module is a control box; the sub-control module is a control box.

11. A high voltage DC power supply system, characterized in that: The high-voltage direct current power supply system includes a distributed charging and series-connected boost circuit as described in any one of claims 1 to 10.

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