Generator charging circuit, generator and generator starting method

Abstract

The embodiment of the present invention discloses a generator charging circuit, a generator and a generator starting method. The generator charging circuit includes a DC input end, a controller and at least two charging circuits. Each charging circuit includes a voltage regulating module, a switching switch and a charging interface connected in sequence. The switching switch includes an input end, a first output end and multiple second output ends. The input end of the switching switch of each charging circuit is connected to the voltage regulating module, the first output end of the switching switch is connected to the charging interface of the charging circuit, and the multiple second output ends of the switching switch are connected to the charging interfaces of other charging circuits. Before starting the generator, the controller controls the input end of the switching switch in the charging circuit without battery access to be connected to the second output end. The voltage regulating module of the charging circuit without battery access is clamped by the battery of other charging circuits. The voltage difference of the electronic components of the voltage regulating module is within the withstand voltage range, which avoids damage to the electronic components due to excessive voltage at the moment of generator starting.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of generator charging, and in particular to a generator charging circuit, a generator and a generator starting method. Background Art

[0002] Electric-driven drones use lithium batteries as their power source. Since it is not convenient for drones to obtain 220V AC mains electricity when operating outdoors, generators are usually used to charge lithium batteries.

[0003] Drones are usually equipped with multiple lithium batteries. In order to meet the charging needs, the generator charging circuit is usually equipped with multiple charging circuit outputs to charge multiple lithium batteries at the same time. Figure 1 The charging circuit of the generator shown is provided with two charging circuits, which can charge two lithium batteries at the same time. Each charging circuit includes an electronic switch. The input end of each charging circuit is connected to the output end of the generator, and the output end of each charging circuit can be connected to the lithium battery that needs to be charged.

[0004] However, the generator uses a self-priming carburetor. During the starting process of the generator, gasoline enters the engine cavity. When the generator speed reaches a certain value, the gasoline in the cavity is ignited by the high-voltage package to start the generator. Because there is unburned gasoline in the cavity before the generator is started, even if the generator throttle is in the idle throttle state, the unburned gasoline in the cavity is ignited after the engine is started, causing the engine speed to exceed the idle speed. The generator uses an uncontrolled rectifier bridge to output voltage. The output voltage at the moment of generator starting is greater than the output voltage at the idle speed. Figure 1 When there is no lithium battery connected to the charging circuit, the voltage difference across the electronic switch in the charging circuit is equal to the output voltage of the generator, resulting in the voltage difference across the electronic switch being outside the withstand voltage range of the electronic switch at the moment the generator starts, causing damage to the electronic switch. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a generator charging circuit, a generator and a generator starting method to solve the problem that when the generator is charged, the electronic components of the charging circuit without a battery connected are damaged at the moment of generator starting.

[0006] To achieve this purpose, the embodiment of the present invention adopts the following technical solutions:

[0007] In a first aspect, a generator charging circuit is provided, comprising a DC input terminal, a controller and at least two charging circuits, each of the charging circuits comprising a voltage regulating module, a switching switch and a charging interface, the DC input terminal, the voltage regulating module, the switching switch and the charging interface being connected in sequence;

[0008] The switching switch includes an input end, a control end, a first output end and a plurality of second output ends. In one of the charging circuits, the input end of the switching switch is connected to the voltage regulating module, the first output end of the switching switch is connected to the charging interface of the charging circuit, and the plurality of second output ends of the switching switch are connected to the charging interfaces of other charging circuits in a one-to-one correspondence.

[0009] The controller is connected to the control end of the switching switch in each of the charging circuits. The controller is used to detect the battery access status of each charging interface, and control the input end of the switching switch in the charging circuit where the charging interface without battery access is located to be connected to the second output end through the control end, so as to be connected to the charging interface with battery access through the second output end, and start the generator.

[0010] Optionally, the voltage regulating module includes a first electronic switch, a second electronic switch and an inductor, the first electronic switch and the second electronic switch each include an input end, an output end and a control end, the DC input end and the charging interface each include a positive electrode and a negative electrode, the input end of the first electronic switch is connected to the positive electrode of the DC input end, the output end of the first electronic switch is connected to one end of the inductor, the other end of the inductor is connected to the input end of the switching switch, the first output end of the switching switch is connected to the negative electrode of the charging interface of the charging circuit, the multiple second output ends of the switching switch are connected one-to-one with the negative electrodes of the charging interfaces of other charging circuits, the output end of the first electronic switch is also connected to the input end of the second electronic switch, the output end of the second electronic switch is connected to the positive electrode of the charging interface, and the positive electrode of the charging interface is connected to the negative electrode of the DC input end;

[0011] The controller is connected to the control end of the first electronic switch and the control end of the second electronic switch, and is used to control the duty cycle of the first electronic switch and the second electronic switch to adjust the voltage of the charging interface.

[0012] Optionally, the first electronic switch and the second electronic switch are one of a triode, an insulated gate bipolar transistor, and a field effect transistor.

[0013] Optionally, the first electronic switch and the second electronic switch are N-channel field effect transistors.

[0014] Optionally, the switching switch is one of a dip switch, a relay, and a contactor.

[0015] Optionally, the number of the charging circuits is two.

[0016] In a second aspect, a generator is provided, comprising an AC output end, a rectifier bridge, and any one of the generator charging circuits provided in the first aspect, wherein the AC output end is connected to the input end of the rectifier bridge, and the output end of the rectifier bridge is connected to the DC input end of the generator charging circuit.

[0017] Optionally, the rectifier bridge is an uncontrollable rectifier bridge.

[0018] In a third aspect, a generator starting method is provided, which is applied to the generator according to the second aspect, and the generator starting method comprises:

[0019] The controller detects the battery access status of each charging interface;

[0020] According to the battery access status, the input end of the switch in the charging circuit where the charging interface without battery access is located is controlled to be connected to the second output end, so as to be connected to the charging interface with battery access through the second output end;

[0021] The generator is started.

[0022] Optionally, the step of controlling the input end of a switch in a charging circuit where a charging interface without battery access is located to be connected to the second output end according to the battery access state includes:

[0023] Determine a charging circuit with a battery connected and a charging circuit without a battery connected according to the battery connection status;

[0024] Controlling the input end of the switch of the charging circuit connected to the battery to be connected to the first output end;

[0025] The input end of the switch controlling the charging circuit without battery connection is connected to the second output end, and the second output end is connected to the charging interface of any charging circuit with battery connection.

[0026] In the generator charging circuit of the embodiment of the present invention, the input end of the switching switch of each charging circuit is connected to the voltage regulating module, the first output end of the switching switch is connected to the charging interface of the charging circuit, and the multiple second output ends of the switching switch are connected to the charging interfaces of other charging circuits in a one-to-one correspondence. Before starting the generator, the controller can detect the battery access status of each charging interface, and control the input end of the switching switch in the charging circuit where the charging interface without battery access is located to be connected to the second output end, so as to be connected to the charging interface with battery access through the second output end, so that the voltage regulating module of the charging circuit without battery access is clamped by the battery of other charging circuits, and the voltage difference of the electronic devices in the voltage regulating module is the difference between the voltage of the DC input end and the battery voltage, thereby avoiding the problem that the DC input voltage is too large at the moment of generator starting, the charging interface of the charging circuit without battery access is unloaded, and the voltage difference of the electronic devices in the voltage regulating module exceeds the withstand voltage range to cause damage to the electronic devices, and ensures that the voltage difference of the electronic devices in the voltage regulating modules of each charging circuit is within the withstand voltage range at the moment of generator starting, and the electronic devices will not be damaged due to the excessive voltage at the moment of generator starting, and the generator can start normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0028] Figure 1 The figure is a circuit schematic diagram of a generator charging circuit in the prior art.

[0029] Figure 2 This is a structural block diagram of a generator charging circuit according to Embodiment 1 of the present invention.

[0030] Figure 3 This is a circuit schematic diagram of a generator charging circuit according to Embodiment 1 of the present invention.

[0031] Figure 4 This is a flow chart of the steps of a generator starting method according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] Figure 2 FIG. 1 is a structural block diagram of a generator charging circuit according to a first embodiment of the present invention. Figure 2 As shown, the generator charging circuit of the embodiment of the present invention includes a DC input terminal 10, a controller (not shown) and at least two charging circuits, each charging circuit includes a voltage regulating module 20, a switching switch 30 and a charging interface 40, and the DC input terminal 10, the voltage regulating module 20, the switching switch 30 and the charging interface 40 are connected in sequence.

[0036] Among them, the DC input terminal 10 can be a port for outputting DC power after the AC power output by the generator passes through a rectifier bridge, and the DC input terminal 10 can provide DC power of different voltages to the charging circuit. The voltage regulating module 20 can be a module that increases or decreases the voltage of the DC input terminal, and the voltage regulating module 20 can include various electronic switch tubes. The switching switch 30 can include an input terminal and multiple output terminals, and the input terminal can be connected to any output terminal. For example, the switching switch 30 can be a single-pole multi-throw switch, a contactor, a relay, etc. Among the multiple output terminals of the switching switch 30, a first output terminal and N second output terminals can be included. The input terminal of the switching switch 30 is connected to the output terminal of the voltage regulating module 20, the first output terminal of the switching switch 30 is connected to the charging interface 40 of the charging circuit where the switching switch 30 is located, and the N second output terminals of the switching switch 30 are connected one by one with the charging interfaces 40 of other charging circuits. When the input terminal of the switching switch 30 in a charging circuit is connected to any second output terminal, it is equivalent to the voltage regulating module 20 of the charging circuit being connected to the charging interface 40 of another charging circuit.

[0037] The controller may be a main control module of the generator, which is connected to the control end of the switch 30 in each charging circuit. The controller is used to detect the battery access status of each charging interface 40, and control the switch 40 in the charging circuit where the charging interface without battery access is located through the control end, so that the input end of the switch 40 is connected to the second output end, so as to be connected to the charging interface with battery access through the second output end, so that the voltage regulating module 20 of the charging circuit where the charging interface without battery access is located is connected to the charging interface 40 with battery access, so that the voltage regulating module 20 is clamped by the battery voltage, and the voltage difference of the electronic devices in the voltage regulating module is the difference between the voltage at the DC input end and the battery voltage, and the difference is smaller than the difference of the electronic devices, thereby avoiding the problem that the DC input voltage is too large at the moment of generator starting, the charging interface of the charging circuit without battery access is unloaded, and the voltage difference of the electronic devices in the voltage regulating module exceeds the withstand voltage range to cause damage to the electronic devices, and ensures that the voltage difference of the electronic devices in the voltage regulating modules of each charging circuit is within the withstand voltage range at the moment of generator starting, and the electronic devices will not be damaged due to the excessive voltage at the moment of generator starting, and the generator can be started normally.

[0038] In an optional embodiment of the present invention, the voltage regulating module of each charging circuit may include a first electronic switch, a second electronic switch and an inductor, the first electronic switch and the second electronic switch each include an input end, an output end and a control end, the DC input end and the charging interface each include a positive electrode and a negative electrode, the input end of the first electronic switch is connected to the positive electrode of the DC input end, the output end of the first electronic switch is connected to one end of the inductor, the other end of the inductor is connected to the input end of the switching switch, the first output end of the switching switch is connected to the negative electrode of the charging interface of the charging circuit, the multiple second output ends of the switching switch are connected one-to-one with the negative electrodes of the charging interfaces of other charging circuits, the output end of the first electronic switch is also connected to the input end of the second electronic switch, the output end of the second electronic switch is connected to the positive electrode of the charging interface, the positive electrode of the charging interface is connected to the negative electrode of the DC input end, the controller is connected to the control end of the first electronic switch and the control end of the second electronic switch, and the controller is used to control the duty cycle of the first electronic switch and the second electronic switch to adjust the voltage of the charging interface.

[0039] In order to enable those skilled in the art to more clearly understand the embodiments of the present invention, Figure 3 The generator charging circuit according to the embodiment of the present invention is described by way of example.

[0040] like Figure 3 FIG. 1 is a schematic diagram of a charging circuit of a generator according to an embodiment of the present invention. Figure 3In the embodiment of the present invention, the generator charging circuit includes two charging circuits, wherein the voltage regulating module 20 of one charging circuit may include an electronic switch Q1, an electronic switch Q2 and an inductor L1, the electronic switch Q1 and the electronic switch Q2 both include an input end, an output end and a control end, the DC input end Vin and the first charging interface 401 both include a positive electrode and a negative electrode, the input end of the electronic switch Q1 is connected to the positive electrode of the DC input end Vin, the output end of the electronic switch Q1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to the input end a of the switching switch K1, and the first output end of the switching switch K1 is connected to the positive electrode of the DC input end Vin. The output terminal b is connected to the negative electrode of the first charging interface 401 of the charging circuit, the second output terminal c of the switching switch K1 is connected to the negative electrode of the second charging interface 402, the output terminal of the electronic switch Q1 is also connected to the input terminal of the electronic switch Q2, the output terminal of the electronic switch Q2 is connected to the positive electrode of the first charging interface 401, the positive electrode of the first charging interface 401 is connected to the negative electrode of the DC input terminal Vin, the controller is connected to the control terminal of the electronic switch Q1 and the control terminal of the electronic switch Q2, and the controller is used to control the duty ratio of the electronic switch Q1 and the electronic switch Q2 to adjust the voltage of the first charging interface 401.

[0041] Similarly, another charging circuit includes an electronic switch Q3, an electronic switch Q4 and an inductor L2. The second output end e of the switching switch K2 is connected to the negative electrode of the first charging interface 401. The connection method of other components is the same as the connection method of each component in the above charging circuit, which will not be described in detail here.

[0042] The electronic switches Q1, Q2, Q3 and Q4 can be transistors, insulated gate bipolar transistors, field effect transistors, preferably N-channel field effect transistors. The switching switch K1 and the switching switch Q2 can be a dip switch, a relay, or a contactor.

[0043] The working principle of the generator charging circuit of the embodiment of the present invention is as follows:

[0044] like Figure 3As shown, assuming that the voltage range of the generator output to the DC input terminal Vin is 90V-110V, the withstand voltage value of the electronic switch Q1, the electronic switch Q2, the electronic switch Q3 and the electronic switch Q4 is 100V, if the first charging interface 401 and the second charging interface 402 are both connected to the rechargeable battery, the input terminal a of the switching switch K1 is connected to the output terminal b, the input terminal d of the switching switch K2 is connected to the output terminal f, the voltage across the electronic switch Q2 is equal to the voltage V1 of the battery connected to the first charging interface 401, and the voltage across the electronic switch Q4 is equal to the voltage V2 of the battery connected to the second charging interface 402 , the battery voltage range is usually 42-58.8V, the voltage across the electronic switch Q2 and the electronic switch Q4 is within the withstand voltage range of 100V, the voltage across the electronic switch Q1 is Vin-V1, the voltage across the electronic switch Q3 is Vin-V2, the voltage Vin-V1 and the voltage Vin-V2 are less than 100V, that is, the voltage across the electronic switch Q1 and the electronic switch Q3 is within the withstand voltage range of 100V. At this time, the controller can directly start the generator, and the electronic switch Q1, the electronic switch Q2, the electronic switch Q3 and the electronic switch Q4 will not be damaged by the high voltage at the moment of generator starting.

[0045] If the first charging interface 401 is connected to the battery BAT1, and the second charging interface 402 is not connected to the battery, the voltage of the electronic switch Q1 and the electronic switch Q2 is within the withstand voltage range, and the voltage across the electronic switch Q3 and the electronic switch Q4 is the voltage of the DC input terminal Vin. At the moment of generator startup, the voltage of the DC input terminal Vin is greater than 100V, and the electronic switch Q3 and the electronic switch Q4 will be broken down and damaged. In this regard, the controller can control the input terminal d of the switching switch K2 to be connected to the output terminal e, and the output terminal e of the switching switch K2 to be connected to the negative electrode of the first charging interface 401. Since the first charging interface 401 is Due to the clamping effect of the battery BAT1, the voltage across the electronic switch Q4 is equal to the voltage of the battery BAT1 (approximately 42-58.5V), and the voltage across the electronic switch Q3 is equal to the difference between the voltage of the DC input terminal Vin and the voltage of the battery BAT1. Even if the instantaneous voltage of the DC input terminal Vin reaches 110V, the voltage across the electronic switch Q3 is still within the withstand voltage range of 100V, thereby ensuring that the voltage difference of the electronic switches Q1, Q2, Q3 and Q4 is within the withstand voltage range at the moment of generator starting, and all electronic switches will not be damaged due to excessive voltage at the moment of generator starting.

[0046] It should be noted that, although the generator charging circuit in the above example only includes two charging circuits, in practical applications, those skilled in the art may set more than two charging circuits, and the embodiment of the present invention does not limit the number of charging circuits.

[0047] Embodiment 2

[0048] like Figure 4 FIG. 1 is a flow chart showing the steps of a generator starting method according to an embodiment of the present invention. The generator starting method according to an embodiment of the present invention is applied to a generator, such as Figure 3 As shown, the generator of the embodiment of the present invention comprises an AC output terminal, a rectifier bridge, and a generator charging circuit provided in the first embodiment, wherein the AC output terminal 50 of the generator is connected to the input terminal of the rectifier bridge 60, and the output terminal of the rectifier bridge 60 is connected to the DC input terminal Vin of the generator charging circuit, and optionally, the rectifier bridge 60 is an uncontrolled rectifier bridge. The generator starting method of the embodiment of the present invention for the above generator comprises the following steps:

[0049] S201. The controller detects the battery access status of each charging interface.

[0050] The generator may include multiple charging circuits, each charging circuit has a charging interface, and the charging interface may include an interface detection module, which can detect whether a battery is connected to the charging interface. Exemplarily, the interface detection module may be an infrared detector. When a battery is connected, the infrared detector inputs a high-level signal, otherwise the level is pulled down to the ground to output a low-level signal. The interface detection module can also be mechanical, and when the battery is connected, the mechanical structure is triggered to output a corresponding level signal to indicate that the battery is connected. The generator can be provided with a communication module to communicate with the interface detection module, so as to obtain the battery access status of the charging interface from the interface detection module through the communication module. Of course, those skilled in the art can also obtain the battery access status of the charging interface in other ways, and the embodiments of the present invention are not limited to this.

[0051] S202: Control the input end of a switch in a charging circuit where a charging interface without a battery connected is located to be connected to a second output end according to the battery connection state, so as to be connected to a charging interface with a battery connected through the second output end.

[0052] In an optional embodiment of the present invention, the controller can determine a charging circuit with a battery connected and a charging circuit without a battery connected according to the received battery access status, and control the input end of the switching switch of the charging circuit with a battery connected to be connected to the first output end so as to be connected to the connected battery through the first output end, and control the input end of the switching switch of the charging circuit without a battery connected to be connected to the second output end, and the second output end is connected to the charging interface of any one of the charging circuits with a battery connected.

[0053] like Figure 3As shown, the first charging interface 401 has a battery connected, and the second charging interface 402 has no battery connected. Then, the input end a of the switching switch K1 can be controlled to be connected to the output end b, so that the battery BAT1 connected to the first charging interface 401 is connected to the voltage regulating module 20. At the same time, the input end d of the switching switch K2 is controlled to be connected to the output end e, so as to be connected to the first charging interface 401 through the output end e.

[0054] S203: Start the generator.

[0055] Specifically, after the controller controls the switching action to complete, the controller can send a start signal to start the engine of the generator, and the engine automatically starts and runs to generate electricity.

[0056] The generator starting method of the embodiment of the present invention is applied to a generator, which includes a generator charging circuit, wherein the input end of a switching switch in each charging circuit is connected to a voltage regulating module, the first output end of the switching switch is connected to a charging interface of the charging circuit, and multiple second output ends of the switching switch are connected to the charging interfaces of other charging circuits in a one-to-one correspondence. Before starting the generator, a controller can detect the battery access status of each charging interface, and control the input end of the switching switch in the charging circuit where the charging interface without battery access is located to be connected to the second output end, so as to be connected to the charging interface with battery access through the second output end, so that the voltage regulating module of the charging circuit without battery access is clamped by the battery of other charging circuits, and the voltage difference of the electronic device in the voltage regulating module is the difference between the voltage of the DC input end and the battery voltage, thereby avoiding the problem that the DC input end voltage is too large at the moment of generator starting, the charging interface of the charging circuit without battery access is unloaded, and the voltage difference of the electronic device in the voltage regulating module exceeds the withstand voltage range to cause damage to the electronic device, and ensures that the voltage difference of the electronic device in the voltage regulating module of each charging circuit at the moment of generator starting is within the withstand voltage range, the electronic device will not be damaged due to the excessive voltage at the moment of generator starting, and the generator can start normally.

[0057] In the description of this article, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0058] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0059] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the purpose of clarifying the device. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0060] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A generator charging circuit, characterized in that: It includes a DC input terminal, a controller and at least two charging circuits, each of which includes a voltage regulating module, a switching switch and a charging interface, and the DC input terminal, the voltage regulating module, the switching switch and the charging interface are connected in sequence; The switching switch includes an input end, a control end, a first output end and a plurality of second output ends. In one of the charging circuits, the input end of the switching switch is connected to the voltage regulating module, the first output end of the switching switch is connected to the charging interface of the charging circuit, and the plurality of second output ends of the switching switch are connected to the charging interfaces of other charging circuits in a one-to-one correspondence. The controller is connected to the control end of the switching switch in each of the charging circuits. The controller is used to detect the battery access status of each charging interface, and control the input end of the switching switch in the charging circuit where the charging interface without battery access is located to be connected to the second output end through the control end, so as to be connected to the charging interface with battery access through the second output end, and then start the generator.

2. The generator charging circuit according to claim 1, characterized in that: The voltage regulating module includes a first electronic switch, a second electronic switch and an inductor. The first electronic switch and the second electronic switch each include an input end, an output end and a control end. The DC input end and the charging interface each include a positive electrode and a negative electrode. The input end of the first electronic switch is connected to the positive electrode of the DC input end. The output end of the first electronic switch is connected to one end of the inductor. The other end of the inductor is connected to the input end of the switching switch. The first output end of the switching switch is connected to the negative electrode of the charging interface of the charging circuit. The multiple second output ends of the switching switch are connected to the negative electrodes of the charging interfaces of other charging circuits in a one-to-one correspondence. The output end of the first electronic switch is also connected to the input end of the second electronic switch. The output end of the second electronic switch is connected to the positive electrode of the charging interface. The positive electrode of the charging interface is connected to the negative electrode of the DC input end. The controller is connected to the control end of the first electronic switch and the control end of the second electronic switch, and is used to control the duty cycle of the first electronic switch and the second electronic switch to adjust the voltage of the charging interface.

3. The generator charging circuit according to claim 2, characterized in that: The first electronic switch and the second electronic switch are one of a triode, an insulated gate bipolar transistor, and a field effect transistor.

4. The generator charging circuit according to claim 2, characterized in that: The first electronic switch and the second electronic switch are N-channel field effect transistors.

5. The generator charging circuit according to any one of claims 1 to 4, characterized in that: The switching switch is one of a dip switch, a relay and a contactor.

6. The generator charging circuit according to any one of claims 1 to 4, characterized in that: The number of the charging circuits is two.

7. A generator, characterized in that: The generator comprises an AC output terminal, a rectifier bridge, and a generator charging circuit as described in any one of claims 1 to 6, wherein the AC output terminal is connected to the input terminal of the rectifier bridge, and the output terminal of the rectifier bridge is connected to the DC input terminal of the generator charging circuit.

8. The generator according to claim 7, characterized in that: The rectifier bridge is an uncontrollable rectifier bridge.

9. A generator starting method, characterized in that: Applied to the generator according to claim 7 or 8, the generator starting method comprises: The controller detects the battery access status of each charging interface; According to the battery access state, the input end of the switch in the charging circuit where the charging interface without battery access is located is controlled to be connected to the second output end, so as to be connected to the charging interface with battery access through the second output end; The generator is started.

10. The generator starting method according to claim 9, characterized in that: The method of controlling the input end of the switch in the charging circuit where the charging interface without battery connection is located to be connected to the second output end according to the battery connection state includes: Determine a charging circuit with a battery connected and a charging circuit without a battery connected according to the battery connection status; Controlling the input end of the switch of the charging circuit connected to the battery to be connected to the first output end; The input end of the switch controlling the charging circuit without battery connection is connected to the second output end, and the second output end is connected to the charging interface of any charging circuit with battery connection.

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