Charging equipment circuit and charging equipment

Abstract

The utility model relates to the technical field of electronic equipment, in particular to a charging equipment circuit and charging equipment. Comprising a vehicle-mounted power supply and a charging support, the vehicle-mounted power supply and the charging support are in separable design, the vehicle-mounted power supply comprises a charging equipment power supply side circuit, and the charging support comprises a charging equipment load side circuit. The charging equipment power supply side circuit mainly comprises a switch module, a control module and a power supply module. The charging equipment load side circuit mainly comprises a charging control module and a load connection module, the charging control module is used for controlling the input state of a charging loop, and the load connection module is used for being connected with load equipment and receiving a charging signal. According to the charging equipment, soft start conditions of slow start and slow boost of output time and output voltage can be realized, so that the possibility of occurrence of unfavorable conditions such as arc discharge is reduced, and the safety and the stability of the charging equipment are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment, in particular to a charging device circuit and a charging device. BACKGROUND

[0002] Portable charging devices refer to devices that can be conveniently carried and used to charge various electronic devices such as mobile phones, tablets, laptops, etc. They are usually designed to be light and small in size, suitable for travel, outdoor activities or daily carrying. Currently, many electronic products and devices on the market produce electric arcs when the power supply interface is inserted due to the high voltage breakdown of the air at the moment of terminal contact. When pulled out, the reverse electromotive force generated by some inductive electronic components in the device will also produce a pull arc and an electric spark. In the long run, it will cause the device contact to burn black, accelerate the oxidation and aging of the contact terminals, making the terminal contact resistance unstable, thereby shortening the service life of the contact terminals. At the same time, the pull arc and electric spark generated will also bring great fire safety hazards to the surrounding environment. Therefore, it is necessary to solve the problem of pull arc of the interface terminals in the product design of the charging device to enhance the stability of the related system.

[0003] In related technologies, a combination of multiple protection devices is usually provided to achieve the protection purposes of preventing pull arc and preventing current backflow, etc.

[0004] However, the current common charging device circuit still needs to be optimized. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide a charging device circuit and a charging device that can improve the safety and stability of the charging device.

[0006] The present application provides a charging device power supply side circuit from the first aspect, comprising:

[0007] A switch module comprising a first switch unit, the first switch unit is arranged in a power supply loop of the charging device power supply side, used to control the output state of the power supply signal in the power supply loop, the output state includes the on state and the working voltage;

[0008] A control module connected with the switch module, used to output a control signal to control the switching state of the first switch unit;

[0009] A power supply module connected with the control module, the power supply module is controlled by the control module, used to provide a voltage source signal for the charging device power supply side.

[0010] In one embodiment, the power supply side circuit comprises:

[0011] The power supply interface module comprises a power output pin and a detection signal input pin connected with the control module for detecting the connection state of the power supply interface module and outputting a connection detection signal to the control module when the power supply interface module is connected with a load.

[0012] In one of the embodiments, the first switch unit comprises:

[0013] A first switch MOS transistor, the source end of which is connected with the power module, the gate end of which is connected with the soft start control signal end of the control module, and the drain end of which is connected with the power output pin of the charging device power supply side circuit.

[0014] In one of the embodiments, the switch module further comprises:

[0015] A voltage limiting unit, which is arranged in parallel between the source end and the gate end of the first switch MOS transistor, for voltage control of the power supply signal in the power supply circuit, and which comprises a first resistor, a first capacitor and a first diode arranged in parallel between the source end and the gate end of the first switch MOS transistor.

[0016] The application provides a charging device load side circuit from a second aspect, comprising:

[0017] A charging control module comprising a second switch unit, which is arranged in the charging circuit of the charging device load side, for controlling the input state of the charging signal in the charging circuit, and the input state comprises a conduction state.

[0018] A load connection module connected with the charging control module, for receiving the charging signal and realizing the charging of the load device.

[0019] In one of the embodiments, the charging device load side circuit comprises:

[0020] A charging interface module, which comprises a power input pin and a detection signal output pin, and the detection signal output pin is used to trigger a connection detection signal when connected with the detection signal input pin, so as to start the charging device power supply side circuit.

[0021] In one of the embodiments, the second switch unit comprises:

[0022] A second switch MOS transistor, a source end of the second switch MOS transistor is connected with the charging port of the load connection module, a gate end of the second switch MOS transistor is connected with the control port of the load connection module, and a drain end of the second switch MOS transistor is connected with the power input pin of the charging device load side circuit.

[0023] In one of the embodiments, the charging device load side circuit further comprises:

[0024] A protection unit is arranged in the charging circuit, and is used for protecting the charging circuit.

[0025] The application provides a charging device from a third aspect, which comprises a vehicle-mounted power supply and a charging support, the vehicle-mounted power supply and the charging support are designed in a separable manner, the vehicle-mounted power supply comprises the charging device power supply side circuit according to any one of the first aspect, and the charging support comprises the charging device load side circuit according to any one of the second aspect.

[0026] In one of the embodiments, the vehicle-mounted power supply comprises a power supply interface, the charging support comprises a charging interface, a limiting structure is arranged on the power supply interface and / or the charging interface, the limiting structure is used for adjusting the contact stroke of the detection signal output pin and the detection signal input pin, so that the contact between the power supply output pin and the power supply input pin is earlier than the contact between the adjusted detection signal output pin and the detection signal input pin when the vehicle-mounted power supply is connected with the charging support.

[0027] The charging device circuit and the charging device can achieve the following beneficial effects by implementing the technical features in the embodiments:

[0028] The application provides a charging device, which comprises a vehicle-mounted power supply and a charging support, and the vehicle-mounted power supply and the charging support are designed to be separable, the vehicle-mounted power supply comprises a charging device power supply side circuit, and the charging support comprises a charging device load side circuit. The charging device power supply side circuit mainly comprises a switch module, a control module and a power module. In implementation, the power module can provide a voltage source signal, the control module controls the switch state of a switch unit in the switch module, the output state of a power supply loop is adjusted by adjusting the switch state of a first switch unit, and the adjustment specifically comprises an on state and working voltage adjustment, so that the output time and output voltage of the charging device power supply side can realize slow opening and slow voltage rise soft start conditions, thereby reducing the possibility of arc and other adverse conditions, and improving the safety and stability of the charging device. The charging device load side circuit mainly comprises a charging control module and a load connection module, wherein the charging control module is used for controlling the input state of a charging loop, and the load connection module is used for connecting a load device and receiving a charging signal. In implementation, the charging circuit can be controlled, and the safety and stability of the charging device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0030] Figure 1 It is a circuit structure schematic diagram of a charging device power supply side circuit in an embodiment of the present application.

[0031] Figure 2 It is a circuit connection schematic diagram of a charging device power supply side circuit in an embodiment of the present application.

[0032] Figure 3 It is a circuit structure schematic diagram of a charging device load side circuit in an embodiment of the present application.

[0033] Figure 4 It is a circuit connection schematic diagram of a charging device load side circuit in an embodiment of the present application.

[0034] Figure 5 It is a structure schematic diagram of a charging device in an embodiment of the present application.

[0035] Figure 6 It is a partial structure schematic diagram when a charging interface and a power supply interface are separated in an embodiment of the present application.

[0036] Figure 7Fig. 1 is a schematic diagram of a partial structure when a charging interface and a power supply interface are connected according to an embodiment of the present application.

[0037] Reference signs: 100, power supply side circuit; 110, switch module; 111, first switch unit; 112, voltage limiting unit; 120, control module; 130, power supply module; 140, power supply interface module; 141, power supply output pin; 142, detection signal input pin; 200, load side circuit; 210, charging control module; 211, second switch unit; 220, load connection module; 230, charging interface module; 231, power supply input pin; 232, detection signal output pin; 240, protection unit; 300, vehicle-mounted power supply; 301, power supply interface; 400, charging support; 401, charging interface; 500, limiting structure. DETAILED DESCRIPTION

[0038] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0040] It can be understood that the terms "first", "second" and the like used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of the present application, a first resistor can be referred to as a second resistor, and similarly, a second resistor can be referred to as a first resistor. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0041] It can be understood that "connection" in the following embodiments means that the circuits, modules, units and the like connected to each other have the transmission of electrical signals or data.

[0042] It can be understood that "at least one" means one or more, and "multiple" means two or more. "At least part of the element" means part or all of the element.

[0043] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It should also be understood that the term "comprising" or "including" or "having" or the like, as used herein, is intended to mean the presence of stated features, integers, steps, components, parts, or combinations thereof, but does not preclude the presence or addition of one or more other features, integers, steps, components, parts, or combinations thereof. Also, the use of the term "and / or", as used herein, includes any and all combinations of one or more of the associated listed items.

[0044] The present application is made by the inventor based on the understanding and research of the following problems, specifically:

[0045] Many electronic products and devices on the market currently have the problem that when the power supply interface is inserted, an electric arc is generated due to high voltage breakdown of air at the moment of terminal contact, and when it is pulled out, a reverse electromotive force is generated due to some inductive electronic components in the device, which also generates a pull arc and an electric spark. Long-term use will cause the device contact to burn black, accelerate the oxidation and aging of the contact terminal, make the terminal contact resistance unstable, and thus shorten the service life of the contact terminal. At the same time, the pull arc and electric spark generated will also bring great fire safety hazards to the surrounding environment. Therefore, it is necessary to solve the problem of pull arc of the interface terminal in the product design of the charging device to enhance the stability of the related system of the device.

[0046] In the related art, a combination of multiple protection devices is usually provided to respectively achieve the protection purposes of preventing pull arc and preventing current backflow.

[0047] However, the charging device circuit commonly used at present still needs to be optimized.

[0048] Based on this, the embodiments of the present application provide a charging device circuit and a charging device. As shown in Figure 1 Figure 1 A circuit structure schematic diagram of a charging device power supply side circuit 100 is shown. The embodiments of the present application provide a charging device power supply side circuit 100, which includes a switching module 110, a control module 120 and a power supply module 130.

[0049] The switching module 110 includes a first switching unit 111, which is arranged in the power supply loop of the charging device power supply side, and is used to control the output state of the power supply signal in the power supply loop. The specific output state can include a conduction state and a working voltage.

[0050] ​For example, the first switching unit 111 can be implemented by a controllable switching device, such as a relay, transistor, power MOSFET, IGBT (Insulated Gate Bipolar Transistor), silicon controlled rectifier (SCR), Schottky diode, optocoupler, etc. The switching module 110 may also include other circuit units for assisting in the implementation of output state control.

[0051] The control module 120 is connected to the switch module 110 and is used to output control signals to control the switching state of the first switch unit 111.

[0052] For example, control module 120 can refer to a combination of electronic and software components used to control and manage a system or device. Control module 120 can be a PLC (Programmable Logic Controller), MCU (Microcontroller Unit), single-board computer, or programmable logic circuit, etc.

[0053] The power module 130 is connected to the control module 120, and the power module 130 is controlled by the control module 120 to provide a voltage source signal to the power supply side of the charging device.

[0054] By implementing the power supply side circuit 100 of the charging device described above, the following beneficial effects can be achieved:

[0055] This application provides a power supply side circuit 100 for a charging device, mainly including a switch module 110, a control module 120, and a power supply module 130. In implementation, the power supply module 130 can provide a voltage source signal, and the control module 120 controls the switching state of the switch unit in the switch module 110. By adjusting the switching state of the first switch unit 111, the output state of the power supply circuit is adjusted. The adjustment specifically includes the conduction state and the working voltage adjustment, thereby enabling the output time and output voltage of the charging device to achieve soft start conditions of slow start-up and slow voltage boost, thereby reducing the possibility of arcing and other adverse conditions, and improving the safety and stability of the charging device.

[0056] In one embodiment, it can be as follows Figure 1 as well as Figure 2 As shown, Figure 2 The diagram shows a circuit connection diagram of a power supply side circuit 100 for a charging device, which includes a power supply interface module 140.

[0057] The power supply interface module 140 includes a power output pin 141 and a detection signal input pin 142. The detection signal input pin 142 is connected to the control module 120 and is used to detect the connection status of the power supply interface module 140 and output a connection detection signal to the control module 120 when the power supply interface module 140 is connected to a load.

[0058] In the embodiment, the power output pin 141 and the detection signal input pin 142 are arranged in the interface module, which helps to control the state of the switch module 110 through the connection detection signal provided by the detection signal input pin 142, so that the power output pin 141 can only be soft-started after complete docking, which helps to reduce the possibility of gap between power contacts and improve the safety and stability of the device.

[0059] In one of the embodiments, as shown in Figure 1 and Figure 2 The first switch unit 111 includes a first switch MOS tube N1.

[0060] Exemplarily, the source end of the first switch MOS tube N1 is connected with the power module 130. The gate end of the first switch MOS tube N1 is connected with the soft-start control signal end of the control module 120. The drain end of the first switch MOS tube N1 is connected with the power output pin 141 of the charging device power supply side circuit 100.

[0061] In the embodiment, the soft-start control is realized by the MOS tube, which helps to improve the flexibility of conduction control and simplify the circuit.

[0062] In one of the embodiments, as shown in Figure 1 and Figure 2 The switch module 110 further includes a voltage limiting unit 112.

[0063] Exemplarily, the voltage limiting unit 112 can be arranged in parallel between the source end and the gate end of the first switch MOS tube N1. The voltage limiting unit 112 is used for voltage control of the power supply signal in the power supply loop.

[0064] Specifically, the voltage limiting unit 112 includes a first resistor R1, a first capacitor C1 and a first diode D1 arranged in parallel between the source end and the gate end of the first switch MOS tube N1.

[0065] In the embodiment, the voltage limiting unit 112 can rectify and limit the voltage of the power supply signal in the power supply loop, and also can absorb the peak current, which helps to improve the flexibility of power supply signal control and the stability of output.

[0066] Based on the same inventive concept, the embodiment of the present application further provides a charging device load side circuit 200.

[0067] The embodiment of the present application provides a charging device load side circuit 200, which can include a charging control module 210 and a load connection module 220, as shown in Figure 3

[0068] ​The charging control module 210 includes a second switch unit 211 arranged in a charging circuit on the load side of the charging device, used to control the input state of the charging signal in the charging circuit, and the input state includes a conduction state.

[0069] The second switch unit 211 can be implemented by a controllable switching device, such as a relay, a transistor, a power MOSFRET, an IGBT (Insulated Gate Bipolar Transistor), a thyristor (SCR), a Schottky diode, an optical coupler, etc. The switching module 110 can also include other circuit units for assisting in realizing output state control.

[0070] The load connection module 220 is connected to the charging control module 210, used to receive the charging signal and realize charging of the load device.

[0071] The load can refer to an electrical device or element connected to a power supply or circuit, which consumes electrical energy to perform a specific function. The load connection module 220 can refer to a circuit module for connecting the load.

[0072] By implementing the above-mentioned charging device load side circuit 200, the following beneficial effects can be achieved:

[0073] The present application provides a charging device load side circuit 200, mainly including a charging control module 210 and a load connection module 220, wherein the charging control module 210 is used to control the input state of the charging circuit, and the load connection module 220 is used to connect the load device and receive the charging signal. In this way, the charging circuit can be controlled, and the safety and stability of the charging device can be improved.

[0074] In one embodiment, as shown in Figure 3 and Figure 4 The charging device load side circuit 200 includes a charging interface module 230.

[0075] The charging interface module 230 includes a power input pin 231 and a detection signal output pin 232, and the detection signal output pin 232 is used to trigger a connection detection signal when connected to the detection signal input pin 142, so as to start the charging device power supply side circuit 100.

[0076] In this embodiment, the charging device load side circuit 200 further includes a charging interface module 230, and the power input pin 231 and the detection signal output pin 232 of the charging interface module 230 are used to realize the interaction between the load side circuit 200 and the power supply side circuit 100, which helps to realize the connection detection between the two, and improves the stability and safety of the charging connection.

[0077] In one embodiment, as shown inFigure 3 and Figure 4 As shown in FIG. 11, the second switch unit 211 includes a second switch MOS transistor N2.

[0078] Exemplarily, the source end of the second switch MOS transistor N2 is connected with the charging port of the load connection module 220, the gate end of the second switch MOS transistor N2 is connected with the control port of the load connection module 220, and the drain end of the second switch MOS transistor N2 is connected with the power input pin 231 of the charging device load side circuit 200.

[0079] In this embodiment, the second switch unit 211 is configured by a switch MOS transistor to realize the on-off control of the charging circuit, which helps to improve the flexibility and stability of the charging control.

[0080] In one of the embodiments, the charging device load side circuit 200 can be configured as shown in FIG. 12. Figure 3 and Figure 4 As shown in FIG. 13, the charging device load side circuit 200 further includes a protection unit 240.

[0081] Exemplarily, the protection unit 240 is arranged in the charging circuit to cut off the reverse current in the charging circuit. The protection unit 240 can be an electronic element for preventing the current from flowing in the reverse direction, which can be a reverse protection device or a unidirectional conduction device, such as a diode, a field effect transistor, a current limiter, etc. The protection unit 240 can also be used to eliminate the high voltage spikes in the circuit, to protect the electronic device from the voltage surge, especially in the case of docking, switching operation or system failure, etc. Specifically, the protection unit 240 can also be configured based on a surge protection device, which includes a surge protection device (SPD), a transient voltage suppressor (TVS), a metal oxide varistor (MOV), a gas discharge tube (GDT), and a filter, etc.

[0082] In this embodiment, the protection unit 240 is configured to cut off the reverse current, which helps to prevent the reverse flow of current in the circuit and causes damage to the device, thereby improving the safety and stability of the charging device. On the other hand, the protection unit 240 can eliminate the high voltage spikes in the circuit, to protect the electronic device from the voltage surge, thereby further improving the safety and stability of the circuit.

[0083] Based on the same inventive concept, the embodiments of the present application also provide a charging device, which can be configured as shown in FIG. 14. Figure 5 As shown in FIG. 14, Figure 5 FIG. 15 shows a structure schematic diagram of a charging device in an embodiment of the present application. The charging device provided by the present application includes a vehicle-mounted power supply 300 and a charging support 400.

[0084] Exemplarily, the vehicle-mounted power supply 300 and the charging support 400 are designed to be separable, the vehicle-mounted power supply 300 can include the charging device power supply side circuit 100 as described in the above embodiments, and the charging support 400 can include the charging device load side circuit 200 as described in the above embodiments.

[0085] In one embodiment, the vehicle-mounted power supply 300 includes a power supply interface 301, and the charging support 400 includes a charging interface 401. Specifically, the power supply interface 301 and / or the charging interface 401 can be provided with a limiting structure 500, which is used to adjust the contact stroke of the detection signal output pin 232 and the detection signal input pin 142, so that when the vehicle-mounted power supply 300 is connected with the charging support 400, the contact of the power supply output pin 141 and the power supply input pin 231 is earlier than the contact of the adjusted detection signal output pin 232 and the detection signal input pin 142.

[0086] Exemplarily, the limiting structure 500 can be arranged as shown in Figure 6 and Figure 7 Exemplarily, the limiting structure 500 can be arranged as shown in Figure 6 Fig. 1 shows a partial structure schematic diagram of a charging interface 401 and a power supply interface 301 in a separation state in an embodiment of the present application; Figure 7 Fig. 2 shows a partial structure schematic diagram of a charging interface 401 and a power supply interface 301 in a docking state in an embodiment of the present application.

[0087] In the embodiment, the limiting structure 500 is arranged to form a difference in the contact stroke of the power supply pin and the detection pin, so that when connected, the contact of the power supply output pin 141 and the power supply input pin 231 is earlier than the contact of the adjusted detection signal output pin 232 and the detection signal input pin 142, so that when docking, there is no gap between the power supply contact points when charging starts, avoiding the generation of arc and spark, which helps to improve the safety and stability of the charging device.

[0088] It can be understood that the charging device circuit and the charging device described above can also adopt other forms, which are not limited to the forms mentioned in the above embodiments, as long as they can achieve the function of improving the safety and stability of the charging device.

[0089] The above circuit can be applied to a separable portable charging device such as a vehicle-mounted, airborne or other electronic device.

[0090] In the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0091] Each technical feature of the above-described embodiments can be combined with any other technical feature, and for the sake of brevity, not all possible combinations are described, but it is understood that the scope of the present disclosure encompasses all such possible combinations.

[0092] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as limiting the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the present application should be subject to the appended claims.

Claims

1. A charging device power supply side circuit, characterized by, The application relates to a charging device power supply circuit, which comprises the following parts: a switch module, which comprises a first switch unit arranged in a power supply loop of a charging device power supply side, is used for controlling the output state of a power supply signal in the power supply loop, and the output state comprises a conducting state and working voltage; a control module connected with the switch module, which is used for outputting a control signal to control the switch state of the first switch unit; a power supply module connected with the control module, which is controlled by the control module and is used for providing a voltage source signal for the charging device power supply side.

2. The charging device power supply side circuit according to claim 1, characterized by, The power supply side circuit comprises: a power supply interface module, which comprises a power supply output pin and a detection signal input pin, the detection signal input pin is connected with the control module, is used for detecting the connection state of the power supply interface module, and outputs a connection detection signal to the control module when the power supply interface module is connected with a load.

3. The charging device power supply side circuit according to claim 2, characterized by, The first switch unit comprises: a first switch MOS tube, the source end of the first switch MOS tube is connected with the power supply module, the gate end of the first switch MOS tube is connected with the soft start control signal end of the control module, and the drain end of the first switch MOS tube is connected with the power supply output pin of the charging device power supply side circuit.

4. The charging device power supply side circuit according to claim 3, wherein The switch module further comprises: a voltage limiting unit, which is arranged in parallel between the source end and the gate end of the first switch MOS tube, is used for voltage control of the power supply signal in the power supply loop, and comprises a first resistor, a first capacitor and a first diode arranged in parallel between the source end and the gate end of the first switch MOS tube.

5. A charging device load side circuit, characterized by, The application further relates to a charging device load side circuit, which comprises the following parts: a charging control module, which comprises a second switch unit arranged in a charging loop of a charging device load side, is used for controlling the input state of a charging signal in the charging loop, and the input state comprises a conducting state; a load connection module connected with the charging control module, which is used for receiving the charging signal and realizing charging of a load device.

6. The charging device load side circuit according to claim 5, wherein, The charging device load side circuit further comprises: a charging interface module, which comprises a power supply input pin and a detection signal output pin, and the detection signal output pin is used for triggering a connection detection signal when connected with the detection signal input pin, so that the charging device power supply side circuit is started.

7. The charging device load side circuit according to claim 6, wherein, The second switch unit comprises: a second switch MOS tube, the source end of the second switch MOS tube is connected with a charging port of the load connection module, the gate end of the second switch MOS tube is connected with a control port of the load connection module, and the drain end of the second switch MOS tube is connected with the power supply input pin of the charging device load side circuit.

8. The charging device load side circuit according to claim 5, wherein, The charging device load side circuit further comprises: a protection unit arranged in the charging loop, which is used for protecting the charging loop.

9. A charging device, characterized by The vehicle-mounted power supply and the charging support are detachable, the vehicle-mounted power supply comprises the power supply side circuit of the charging device according to any one of claims 1-4, and the charging support comprises the load side circuit of the charging device according to any one of claims 5-8.

10. The charging apparatus according to claim 9, characterized by, The vehicle-mounted power supply comprises a power supply interface, the charging support comprises a charging interface, and a limiting structure is arranged on the power supply interface and / or the charging interface, the limiting structure is used for adjusting the contact stroke of the detection signal output pin and the detection signal input pin, and when the vehicle-mounted power supply is connected with the charging support, the contact of the power supply output pin and the power supply input pin is earlier than the contact of the adjusted detection signal output pin and the detection signal input pin.

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