CN219634995U

CN219634995U - Charging device and system

Info

Publication number: CN219634995U
Application number: CN202223324837.0U
Authority: CN
Inventors: 冷永生; 华贤卫; 张争明; 丁航
Original assignee: Zhejiang Zero Run Technology Co Ltd; Zhejiang Lingxiao Energy Technology Co Ltd
Current assignee: Zhejiang Zero Run Technology Co Ltd; Zhejiang Lingxiao Energy Technology Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-09-05
Anticipated expiration: 2032-12-12

Abstract

The application relates to a charging device and a system, wherein the device comprises a power line interface and a control box, the power line interface is matched with a charging plug, the power line interface is connected with the control box during charging, a target vehicle is charged through the control box, and the control box comprises a charging main loop and a control unit; the first interface comprises a first input main loop and a sampling unit, wherein the sampling unit is connected with a power line and is used for sampling an input signal of the power line during charging; the second interface comprises a second input main loop; when the first interface is connected with the control box, the charging main loop is connected with the first input main loop, the control unit is connected with the sampling unit, and the control unit is used for adjusting the charging current of the charging main loop according to the sampling result of the sampling unit; when the second interface is connected with the control box, the charging main loop is connected with the second input main loop.

Description

Charging device and system

Technical Field

The present application relates to the field of charging technologies, and in particular, to a charging device and a charging system.

Background

With the continuous development of economy, new energy automobiles gradually enter the field of view of the public due to the advantages of green and environment protection. The power sources of the new energy automobiles are generally natural gas, petroleum gas, hydrogen and electric power. Taking an electric automobile as an example, in the use process, the electric automobile needs to be charged in time to provide functional energy for the electric automobile so as to ensure normal use. However, the types and performances of the charging equipment or the batteries used by the electric automobile are different, the required power supply is different, and meanwhile, the performances of the plugs are different. Therefore, the user may need to adapt to different charging devices corresponding to different charging scenes, thereby causing cost improvement and space waste. Based on this, how to make the charging device more convenient, faster and safer to charge the electric automobile has become a problem in the related art.

Disclosure of Invention

The embodiment of the utility model aims to provide a charging device and a charging system, which can solve the technical problem that the charging device is inconvenient to carry in the use process in the related art.

In a first aspect, an embodiment of the present utility model provides a charging device, where the device includes a power line interface and a control box, the power line interface is matched with a charging plug, the power line interface is connected to the control box during charging, and charges a target vehicle through the control box, where:

The control box comprises a charging main loop, a sampling unit and a control unit;

the power line interface comprises a first interface and a second interface, the first interface comprises a first input main loop and a connecting unit, and the connecting unit is connected with a power line and is used for connecting an input signal of the power line during charging;

the second interface comprises a second input main loop;

when the first interface is connected with the control box, the charging main loop is connected with the first input main loop, the input end of the sampling unit is connected with the connecting unit and used for sampling the input signal of the connecting unit, the output end of the sampling unit is connected with the control unit, and the control unit is used for adjusting the charging current of the charging main loop according to the sampling result of the sampling unit;

when the second interface is connected with the control box, the charging main loop is connected with the second input main loop.

According to the charging device provided by the embodiment of the application, whether the connecting unit is arranged in the power line plug can be determined according to the specification of the charging plug, so that the control box can judge the specification of the charging plug according to whether the preset sampling unit is connected with the connecting unit or not and whether the input signal of the connecting unit is sampled, the charging current matched with the charging plug can be switched, and then the charging current can be input into a target vehicle through the vehicle connector. In this way, the charging device may require only one control box, one vehicle charging interface, two replaceable power cords and corresponding power interfaces. A control box and a vehicle charging interface are reduced as compared to prior art charging devices. That is, in different charging scenarios, such as selecting the charging plug of 10A or selecting the charging plug of 16A, the same control box can be used to charge the target vehicle, so that the structure of the charging device is simplified, and the charging device is more convenient to carry.

Optionally, in an embodiment of the present application, the sampling unit includes an optocoupler, and the optocoupler samples the input signal of the connection unit by controlling the secondary side to be turned on when charging.

Optionally, in an embodiment of the present application, the charging device further includes an over-temperature protection circuit, where the over-temperature protection circuit is disposed at an output end of the control box and is connected to the charging main circuit in a serial manner, the over-temperature protection circuit is connected to the control box, and the over-temperature protection circuit includes a temperature detection module and a control switch, where the control switch is used to control on-off of the charging main circuit, and the temperature detection module is used to detect a temperature of the output end and send the temperature to the control unit, and the control unit turns off the control switch when it is determined that the temperature is greater than a preset temperature threshold.

Optionally, in an embodiment of the present application, the control box further includes a leakage current protector connected to the charging main loop.

Optionally, in an embodiment of the present application, the charging device further includes a sounding module connected to the control unit, and the control unit is configured to control the sounding module to send a voice prompt.

Optionally, in one embodiment of the present application, the charging device further includes a wireless communication device, and the charging device communicates with the client through the wireless communication device.

Optionally, in an embodiment of the present application, the connection unit is connected to a live wire of the power cord.

In a second aspect, an embodiment of the present application further provides a charging system, where the system includes a charging plug, a power cord connected to the charging plug, a charging device and a vehicle charging interface according to the foregoing embodiments, where the charging device is disposed between the power cord and the vehicle charging interface.

In a second aspect, an embodiment of the present application further provides a charging device, where the device includes a control box and a plurality of power line interfaces, the plurality of power line interfaces are respectively matched with a plurality of charging plugs, each of the power line interfaces is connected to the control box during charging, and charges a target vehicle through the control box, where:

the power line interface comprises an input main loop and a connecting unit, and the sampling unit is connected with the power line and is used for accessing an input signal of the power line during charging;

The resistance value of the connection unit of each power line interface is matched with the corresponding charging plug;

when the power line interface is connected with the control box, the charging main loop is connected with the input main loop, the input end of the sampling unit is connected with the connecting unit and used for sampling the input signal of the connecting unit, the output end of the sampling unit is connected with the control unit, and the control unit is used for adjusting the charging current of the charging main loop according to the sampling result of the sampling unit.

Optionally, in an embodiment of the present application, the control unit includes a plurality of comparators and switching devices connected to the comparators, each of the comparators is connected to the sampling unit, and each of the comparators controls on/off of the switching device according to a comparison result between the input voltage and a preset voltage threshold, so as to adjust the charging current of the charging main circuit.

In a third aspect, an embodiment of the present application further provides a charging system, where the charging system includes a charging plug, a power cord connected to the charging plug, and the charging device and the vehicle charging interface described in the foregoing embodiments, and the charging device is disposed between the power cord and the vehicle charging interface.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic block diagram of a charging device according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating a primary loop connection of a charging plug to a power cord interface, according to one embodiment;

FIG. 3 is a schematic diagram illustrating a main loop connection of a power line interface to a control box according to one embodiment;

FIG. 4 is a schematic diagram illustrating the connection of a power line interface to a control box according to one embodiment;

FIG. 5 is a schematic block diagram of a control box according to an embodiment;

FIG. 6 is a schematic block diagram of an optical coupler according to an embodiment;

FIG. 7 is a schematic block diagram of an over-temperature protection circuit according to an embodiment;

fig. 8 is a schematic block configuration diagram of a control box shown according to another embodiment;

fig. 9 is a schematic block configuration diagram of a charging device according to another embodiment;

fig. 10 is a schematic block diagram of a charging system according to an embodiment of the present application;

fig. 11 is a schematic diagram of a charging process of the charging system according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus consistent with aspects of the application as detailed in the accompanying claims.

The structures, capabilities, effects, or other features described in a particular embodiment may be incorporated in one or more other embodiments in any suitable manner without departing from the spirit of the present application. In describing particular embodiments, specific details of construction, performance, effects, or other features are set forth in order to provide a thorough understanding of the embodiments by those skilled in the art. It is not excluded, however, that one skilled in the art may implement the present application in a particular situation in a solution that does not include the structures, properties, effects, or other characteristics described above. The block diagrams in the figures generally represent functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and/or processing unit means and/or microcontroller means. The same reference numerals in the drawings denote the same or similar elements, components or portions, and thus repeated descriptions of the same or similar elements, components or portions may be omitted hereinafter. It will be further understood that, although the terms first, second, third, etc. may be used herein to describe various devices, elements, components or portions, these devices, elements, components or portions should not be limited by these terms. That is, these phrases are merely intended to distinguish one from the other. For example, a first device may also be referred to as a second device without departing from the spirit of the application. Furthermore, the term "and/or," "and/or" is meant to include all combinations of any one or more of the items listed. In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In practical applications, when an electric vehicle is charged by connecting a power supply device such as a charging post, a charging station, etc., the charging device inserts a charging plug of an onboard charging wire into a socket of the charging post or the charging station. While the charging plugs are of various types, such as 10A charging plug and 16A charging plug, the charging plugs are different, and the adapted charging device sockets are also different. In national standard GBT18487.1-2015 part 1 of electric car conduction charging System: the general requirements define that the maximum charging current selectable according to the charging plug and the charging gun is 8a and 13a when the mode II is charged. The charging plug of 10A is required when the maximum charging current is 8a, and the charging plug of 16A is required when the maximum charging current is 8 a. The current technology cannot uniformly use the protection box for charging 13a and 8a, so that a user needs to carry two sets of onboard charging wires.

Based on the above technical requirements, the embodiment of the application provides a charging device, which specifically may include a power line interface and a control box, where the power line interface is matched with a charging plug, the power line interface is connected with the control box during charging, and charges a target vehicle through the control box, where: the control box comprises a charging main loop and a control unit; the power line interface comprises a first interface and a second interface, the first interface comprises a first input main loop and a sampling unit, and the sampling unit is connected with a power line and is used for sampling an input signal of the power line during charging; the second interface comprises a second input main loop; when the first interface is connected with the control box, the charging main loop is connected with the first input main loop, the control unit is connected with the sampling unit, and the control unit is used for adjusting the charging current of the charging main loop according to the sampling result of the sampling unit; when the second interface is connected with the control box, the charging main loop is connected with the second input main loop. In this way, whether the sampling unit is arranged in the power line plug can be determined according to the specification of the charging plug, the control box can judge the specification of the charging plug according to whether the input information sampled by the sampling unit is received, so that the charging current matched with the charging plug can be switched, and then the charging current can be input into a target vehicle through the vehicle connector. In this way, the charging device may require only one control box, one vehicle charging interface, two replaceable power cords and corresponding power interfaces. A control box and a vehicle charging interface are reduced as compared to prior art charging devices. That is, in different charging scenarios, such as selecting the charging plug of 10A or selecting the charging plug of 16A, the same control box can be used to charge the target vehicle, so that the structure of the charging device is simplified, and the charging device is more convenient to carry.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a charging device 100 according to an embodiment of the application. As shown in fig. 1, the charging device 100 may include a power line interface 11 and a control box 13, where the power line interface 11 is matched with a charging plug, the power line interface 11 is connected to the control box 13 during charging, and the target vehicle is charged through the control box 13, where:

the control box 13 includes a charging main circuit 131, a sampling unit 133, and a control unit 135;

the power line interface 11 includes a first interface 111 and a second interface 113, the first interface 111 includes a first input main circuit 1111 and a connection unit 1113, and the connection unit 1113 is connected to a power line and is used for accessing an input signal of the power line during charging;

the second interface 113 includes a second input main loop 1131;

when the first interface 111 is connected to the control box 13, the charging main circuit 131 is connected to the first input main circuit 1111, an input end of the sampling unit 133 is connected to the connection unit 1113, and is used for sampling an input signal of the connection unit, an output end of the sampling unit is connected to the control unit 135, and the control unit 135 is used for adjusting a charging current of the charging main circuit 131 according to a sampling result of the sampling unit 133;

When the second interface 113 is connected to the control box 13, the charging main circuit 131 is connected to the second input main circuit.

In the embodiment of the application, the target vehicle may be an electric vehicle, and the electric vehicle may be a vehicle which mainly uses a power battery or a super capacitor as an energy source and is driven by a motor in whole or in part. For example, may include, but is not limited to, electric automobiles, electric motorcycles, electric bicycles, electric forklifts, and the like. In one embodiment of the present application, the power cord interface may be connected to a socket of the power supply device through a power cord and a charging plug to access the charging voltage. The power cord may include a wire, a cable, or the like. The power supply means may comprise a charging peg, for example may comprise a dc charging peg, an ac charging peg or the like. The charging plug may comprise a 10A charging plug, a 16A charging plug. I.e. the charging plug of 10A is different from the power line interface to which the charging plug of 16A is connected. In order to mate the power cord interface with the charging plug, the power cord interface may include a first interface 111 that mates with the charging plug of 16A and a second interface 113 that mates with the charging plug of 10A. In one embodiment of the present application, the power line interface 11 may be connected to a main circuit in the charging plug through an input main circuit therein to access a charging current. As shown in fig. 2, the input main loop may include an input hot, an input neutral, and an input ground. The input live wire can be connected with the live wire in the charging plug, the input neutral wire can be connected with the neutral wire in the charging plug, and the input grounding wire can be connected with the grounding wire in the charging plug. During charging, the power line interface 11 is connected to the control box 13, i.e. the input main circuit in the power line interface 11 is connected to the charging main circuit 131 in the control box 13. As shown in fig. 3, the charging main circuit 131 may include a charging line, a charging neutral line, and a charging ground line, where the charging line may be connected to the charging line, the charging neutral line may be connected to the charging neutral line, and the charging ground line may be connected to the charging ground line.

In practical application, since the charging device only comprises one control box, when the charging plug of 10A is connected with the power supply device to charge the target vehicle, the control box can output 8A of charging current to charge the target vehicle. When the charging plug of 16A is used to connect the power supply device to charge the target vehicle, the control box cannot change the charging current of 13A to charge the target vehicle, so that the charging efficiency cannot achieve the expected effect. In addition, when the power supply device is connected to charge the target vehicle by using the charging plug of 16A, the control box may output the charging current of 13A to charge the target vehicle. When the charging plug of 10A is used to connect the power supply device to charge the target vehicle, the control box cannot change the charging current of 8A to charge the target vehicle, but keeps the charging current of 13A to charge the target vehicle all the time, so that serious potential safety hazards exist and even fire disasters are caused. On this basis, in order to avoid the potential safety hazard, improve charging safety and charging efficiency of charging device, can make control box 13 can discern the scene of charging promptly discern the specification of charging plug and charging socket of switch-in to according to the different switching charging current of scene of charging. In particular, in one embodiment of the application, different modifications may be made to the power cord interface 11 that connects different charging plugs. For example, the connection unit 1113 may be provided in the first interface 111, and the connection unit 1113 may not be provided in the second interface 113. The connection unit 1113 is connected to a power line, and is used for connecting an input signal of the power line during charging; the control box 13 is provided with a sampling unit at a position corresponding to the connection unit, and an output end of the sampling is connected with the connection unit and is used for sampling an input signal of the connection unit. In this way, the control box 13 can identify the charging scene according to whether the input signal collected by the sampling unit 133 is received. So that the control box 13 can subsequently switch the charging current depending on the presence or absence of the input signal. The connecting unit can be a lead or a wire, and the input signal of the connecting unit can be a voltage signal or a current signal. Taking the first interface 111 as an example, the first interface 111 may further include a connection unit 1113 in addition to the first input main circuit 1111, where the connection unit 1113 is connected to a power line, and is used to access an input signal of the power line during charging. In one embodiment of the present application, the connection unit 1113 is connected to the live wire of the power line, or may be connected to the neutral wire of the power line. Specifically, during charging, as shown in fig. 4, the first input main circuit 1111 of the first interface 111 may be connected to the charging main circuit 131, and the connection unit 1113 may be connected to the sampling unit 133. In this way, the control unit 135, upon receiving the input signal sampled by the sampling unit 1113, can determine that the 16A charging plug is connected, so that the charging current of the charging main circuit 131 can be adjusted so that the charging current is 13A. In another embodiment of the present application, taking the second interface 113 as an example, the second interface 113 does not include the connection unit 1113. In this way, the control unit 135 can determine that the charging plug of 10A is connected in case that the input signal is not received, so that the charging current of the charging main circuit 131 can be adjusted such that the charging current is 8A. In one embodiment of the application, the control unit 135 may be connected to the vehicle charging interface via which the target vehicle is charged after regulating the charging current at the output of the control box 13.

In one embodiment of the present application, the control unit 135 may adjust the charging current by adjusting the form of PWM duty cycle. For example, in one example, the charging current may be adjusted according to the PWM duty cycle versus charging current correspondence in table 1 below.

Table 1 correspondence table of PWM duty ratio and charging current

Specifically, as shown in fig. 5, the output end of the control unit 135 may be connected to a PWM contact and a +12v contact, and the control unit 135 may selectively connect to the PWM contact according to the sampling result of the sampling unit 133, and adjust the duty ratio of the PWM according to the corresponding relationship between the duty ratio of the PWM and the charging current contained in the above table 1, so as to determine the adapted charging current.

According to the charging device 100 provided by the embodiment of the application, whether the connection unit 1113 is arranged in the power line plug can be judged according to the specification of the charging plug, so that the control box 13 can judge the specification of the charging plug according to whether the sampling unit 133 preset in the control box is connected with the connection unit 1113 or not and whether the input signal of the connection unit 1113 is sampled, and therefore the charging current matched with the charging plug can be switched, and then the charging current can be input to a target vehicle through the vehicle connector. In this way, the charging device 100 may require only one control box 13, one vehicle charging interface, two replaceable power cords and a corresponding power interface. A control box 13 and a vehicle charging interface are reduced compared to prior art charging devices. That is, the same control box 13 can be used to charge the target vehicle in different charging scenarios, such as selecting a charging plug of 10A or selecting a charging plug of 16A, so that the structure of the charging device 100 is simplified and the carrying is more convenient.

Further, in one embodiment of the present application, the sampling unit 1113 includes an optocoupler, which samples the input signal of the connection unit 1113 by controlling the secondary side to be turned on when charging.

In an embodiment of the present application, the optical coupler (Opticalcoupler Equipment, OCEP) is a device for transmitting an electrical signal with light as a medium, and may include a primary side and a secondary side. In one embodiment of the present application, the optocoupler as the sampling unit 1113 may sample the input signal of the connection unit 1113. Specifically, as shown in fig. 6, the primary side 601 of the optocoupler 600 may be connected to the connection unit 1113, the connection unit may be connected to the live wire of the power line, and the secondary side 603 of the optocoupler may be connected to the sampling unit 133 during charging. The primary side 601 may receive an input signal of the connection unit 1113 and apply the input signal to the light emitting diode and the resistor Ri of the primary side 601 to generate an input current I of the optocoupler 600 _f The input currentI _f The led is driven to turn on the phototransistor of the secondary 603 for the purpose of transmitting the input signal to the sampling unit 133. In addition, in one embodiment of the application, since the signal of the connected power line is an ac signal, and a certain negative voltage such as-200V exists in the live wire of the power line, the reverse cut-off voltage capability of the light emitting diode is not high, so that in order to ensure the normal operation of the optocoupler, a diode may be connected in series between the live wire of the power line and the optocoupler. Due to the isolation between the input and the output of the optocoupler 600, i.e. the optocoupler 600 has a good electrical isolation, high current signals can be prevented from damaging the charging device 100. In addition, the optical coupler 600 has a strong anti-interference capability, so that the stability of the charging device 100 can be improved.

In practical applications, when charging a target vehicle, if a charging circuit in the charging device, such as a charging main circuit or an input main circuit, is in a micro-short circuit or short circuit condition, the charging current will increase rapidly to cause the temperature of the charging device to rise rapidly, which may damage the charging device and even cause a fire hazard. Based on this, in one embodiment of the present application, an over-temperature protection circuit may be provided in the charging device 100 to timely turn off the charging circuit in case of temperature abnormality. Specifically, as shown in fig. 7, the charging device 100 further includes an over-temperature protection circuit 15, where the over-temperature protection circuit 15 is disposed at an output end of the control box 13, and is connected to the charging main circuit 131 in series, the over-temperature protection circuit 15 is connected to the control box 13, the over-temperature protection circuit 15 includes a temperature detection module 151 and a control switch 153, the control switch 153 is used for controlling on-off of the charging main circuit 131, the temperature detection module 151 is used for detecting a temperature of the output end and sending the temperature to the control unit 135, and the control unit 135 closes the control switch 153 when determining that the temperature is greater than a preset temperature threshold.

In an embodiment of the present application, the temperature detection module 151 may include a thermistor, a Resistance Temperature Detector (RTD), a thermocouple, and the like. Taking the temperature detection module 151 as an example of the thermistor, the thermistor is a thermistor with a negative temperature coefficient, i.e. the resistance value thereof decreases exponentially with the temperature. The temperature detection module 151 may detect the temperature of the output terminal of the control box 13 and transmit the temperature to the control unit 135. The control unit 135 may compare the temperature with the preset temperature threshold after receiving the temperature, and switch off the control switch 153 to switch the charging main circuit 131 when the temperature is greater than the preset temperature threshold, thereby protecting the charging device 100. Wherein the preset temperature threshold may be set by a user. For example, a normal operation state limit test may be performed on the actual charging device 100 to determine a temperature value of the charging device 100 in a limit operation state, so as to determine the preset temperature threshold, and of course, a user may set a temperature value of 70 degrees, 75 degrees, and the like, which does not cause damage to the charging device 100 and significantly exceeds a normal operation range, according to an actual application requirement and a material used by the charging device 100.

Through the above embodiment, the over-temperature detection circuit 15 may be used to perform short-circuit and micro-short-circuit detection on the charging device 100, so as to disconnect the charging circuit in time to enter over-temperature protection, and improve charging safety of the charging device 100 and the target vehicle.

Further, in another embodiment of the present application, in order to protect the charging safety of the charging device 100, a leakage current protector may be further provided in the charging device 100 for overload protection and overvoltage protection. Specifically, as shown in fig. 8, the control box 13 further includes a leakage current protector 137 connected to the charging main circuit 131.

In an embodiment of the present application, the leakage current protector 137 may be connected to the live line, the neutral line, etc. of the charging main circuit 131. The leakage current protector 137 may disconnect the charging main circuit 131 in case of detecting a leakage current to protect charging safety of a target vehicle. For example, as shown in fig. 8, a K1 relay and a K2 relay may be disposed on the charging live wire and the charging neutral wire of the charging main circuit 131, respectively, and the leakage current protector may open the K1 relay or the K2 relay in case of detecting leakage current.

In order to enable the charging device 100 to have the function of sound warning, the charging device 100 further includes a sound emitting module connected to the control unit 135, where the control unit 135 is configured to control the sound emitting module to send a voice prompt.

In an embodiment of the present application, the sound generating device may include a sound box, a speaker, and the like. The control unit 135 may control the sounding module to send a voice prompt when the working state of the charging device 100 is abnormal, such as the temperature of the output end of the control box 13 is abnormal, and the leakage current protector detects the leakage current. For example, in an example, in a case where the temperature of the output terminal of the control box 13 is greater than a preset temperature threshold, the control unit 135 may control the sound generating device to send a voice prompt of "temperature abnormality, possibly with micro-short circuit condition".

Further, in order that the charging device 100 may transmit a charging state or other data to a client or other server, the wireless communication device may be provided in the charging device 100. Specifically, the charging device 100 further includes a wireless communication device through which the charging device 100 communicates with a client.

In an embodiment of the present application, the wireless communication device may be configured to transmit wireless signals, and may include a 4G module, a 5G module, a WiFi module, an NFC sensing module, or a communication module using other wireless communication technologies. The charging device 100 may communicate with clients, which may include mobile smartphones, computers (including notebook computers, desktop computers), tablet electronic devices, personal Digital Assistants (PDAs), etc., through the wireless communication device. The client may send a control instruction to the charging device 100, and the charging device 100 may also send the collected charging state data to the client, and display the collected charging state data on a display screen of the client, so that a user may know the working state of the charging device 100 conveniently. The charge state data may include a charge remaining time, a charge current magnitude, and the like, among others.

In practical applications, the charging plug is not limited to the 10A charging plug, the 16A charging plug, but may also be a 12A charging plug, a 14A charging plug, and the like. In order to diversify a charging scenario, that is, a plurality of charging plugs of different types can all use one control box to charge the target vehicle, the embodiment of the application further provides a charging device, as shown in fig. 9, the charging device 900 includes a control box 901 and a plurality of power line interfaces 903, the plurality of power line interfaces 903 are respectively matched with the plurality of charging plugs, each power line interface 903 is connected with the control box 901 during charging, and the target vehicle is charged through the control box 901, wherein:

The control box 901 comprises a charging main loop 9011, a sampling unit 9013 and a control unit 9015;

the power line interface 903 includes an input main circuit 9031 and a connection unit 9033, where the connection unit 9033 is connected to a power line, and is used to access an input signal of the power line during charging;

the resistance value of the connection unit 9033 of each power line interface 903 is matched with the corresponding charging plug;

when the power line interface 903 is connected to the control box 901, the charging main loop 9011 is connected to the input main loop 9031, an input end of the sampling unit 9013 is connected to the connection unit 9033, and is used for sampling an input signal of the connection unit 9033, an output end of the sampling unit 9013 is connected to the control unit 9015, and the control unit 9015 is used for adjusting a charging current of the charging main loop 9011 according to a sampling result of the sampling unit 9013.

In the embodiment of the present application, the specific connection manner between the control box 901 and the power cord interface 903 may refer to the connection manner described in the foregoing embodiments, and the present application is not described herein again. The charging plug includes a plurality of types, and may include, for example, a charging plug of 10A, a charging plug of 12A, a charging plug of 14A, a charging plug of 16A, and the like. Different power cord interfaces 903 are connected to different charging plugs, i.e. the number of power cord interfaces 903 is the same as the number of plugs. The user may select different power line plugs 903 to charge according to the actual charging requirement or the type of the charging pile, and each power line interface 903 is connected to the control box 901 during charging, so as to charge the target vehicle through the control box 901. Since the adapted charging currents are not identical for different charging plugs, a control unit 9013 needs to be provided in the control box 901 to adjust the charging currents according to the type of charging plug, i.e. the type of power line interface 903. On this basis, the control unit 9013 needs to be able to recognize the type of interface of the power line to the control box 901. Based on this, in one embodiment of the present application, a connection unit 9033 may be provided in the power line interface 903, and the connection unit 9033 is connected to a power line for accessing an input signal of the power line when charging. Wherein, the connection unit 9033 may be a resistor. It can be understood that the resistances of the connection units 9033 set by the different power line interfaces 903 are also different, that is, the resistance of the connection unit 9033 of each power line interface 903 is matched with the corresponding charging plug. For example, the resistance value of the first interface connected to the charging plug of 10A may be set to 10000 ohms, the resistance value of the second interface connected to the charging plug of 12A may be set to 12000 ohms, and the resistance value of the third interface connected to the charging plug of 16A may be set to 16000 ohms. The sampling unit 9013 may detect an input voltage of a power line connected to the resistor, and according to a voltage division principle, it is known that the resistances of the resistors are different, and the voltage division magnitudes of the power line are also different. Therefore, the control unit 9013 may determine the type of the power line interface 903 connected to the control box 901 according to the input voltage acquired by the sampling unit 9033, so as to determine the type of the charging plug, and then may adjust the charging current of the charging main circuit 9011 according to the type of the charging plug. Of course, the sampling unit may also detect the voltage value of the resistor, so as to determine the type of the power line interface connected. Specifically, in one embodiment of the present application, the control unit 9033 may include a plurality of comparators and switching devices connected to the comparators, each of the comparators is connected to the sampling unit 9033, and each of the comparators controls on/off of the switching devices according to a comparison result between the input voltage and a preset voltage threshold value, so as to adjust the charging current of the charging main circuit.

In the embodiment of the present application, the preset voltage threshold may be determined by the user according to the resistance value of the connection unit 9033, and may be set to A, B, C, for example. After receiving the input voltage collected by the sampling unit 9033, the control unit 9015 may sequentially pass through a plurality of comparators, and under the condition that the input voltage is matched with a preset voltage threshold of a target comparator, may control a control switch connected with the target comparator to be turned on, so as to output a charging current matched with the power line interface 903.

It should be noted that, the charging device 900 may further be provided with the leakage current protector, the over-temperature protection circuit, the optocoupler, the wireless communication device, the sounding module, and the like described in the above embodiments, so as to achieve the corresponding functions, and specifically, refer to the above embodiments.

According to the charging device 900 provided by the embodiment of the application, the connection units 9033 with different resistance values can be arranged in the different power line interfaces 903 according to the specifications of the charging plug, so that the control box 901 can judge the specifications of the charging plug according to the magnitude of the input voltage sampled by the receiving sampling unit 9013, thereby switching the charging current matched with the charging plug, and then the charging current can be input to the target vehicle through the vehicle connector. In this way, the charging device may require only one control box, one vehicle charging interface, a plurality of replaceable power cords, and corresponding power interfaces. A control box and a vehicle charging interface are reduced as compared to prior art charging devices. That is, in different charging scenarios, such as selecting the charging plug of 10A or selecting the charging plug of 12A, the same control box can be used to charge the target vehicle, so that the structure of the charging device is simplified, and the charging device is more convenient to carry.

On the other hand, the embodiment of the present application further provides a charging system, as shown in fig. 10, where the system 1000 includes a charging plug 1001, a power cord 1003 connected to the charging plug 1001, and the charging device 100 and the vehicle charging interface 1005 described in the foregoing embodiments, and the charging device 100 is disposed between the power cord 1003 and the vehicle charging interface 1005. Of course, in other embodiments of the present application, the charging device may also be the charging device 900, which is not limited herein.

The specific structure of the charging system, which may include a standard plug, a control box interface, a control box, a vehicle interface, an electric vehicle, is described below with respect to a preferred embodiment, as shown in fig. 11. The right end of the standard plug is sequentially connected with a fire wire, a zero wire and a ground wire from top to bottom, and the right end of the standard plug is connected with the fire wire, the zero wire and the ground wire of the power wire interface through the fire wire, the zero wire and the ground wire. The sampling unit is a switch S4, and the switch S4 is conducted under the condition that the charging plug is a 16A charging plug; and in the case where the charging plug is a 16A charging plug, the switch S4 is turned off. The switch S4 is connected to a voltage detecting unit in the control box via a wire P, and the voltage detecting unit is connected to a vehicle control device (control unit) to transmit the sampling result to the vehicle control device. The right end of the live wire of the control box is connected with a K1 relay, the right end of the zero line is connected with a K2 relay, and a leakage current protector is arranged in the control box. The output end of the vehicle control device is respectively connected with a PWM contact, +12V contact and a contact wire, the right side of the PWM contact is connected with an S1 switch, the right side of the S1 switch is connected with an R1 resistor, the right side of the R1 resistor is connected with the contact wire, the connection part of the R1 resistor and the contact wire is a detection point 1, the right side of the control box is provided with a vehicle interface, the upper side and the lower side of an inner cavity of the vehicle interface are respectively provided with an L joint, an N joint, a PE joint, a CC joint and a CP joint from top to bottom, the left end of the L joint is connected with a K1 relay, the left end of the N joint is connected with a K2 relay, the left side of the PE joint is provided with an S3 switch, the top of the S3 is connected with a ground wire, the bottom of the S3 switch is connected with the bottom of the PE 2, the R3 switch is connected with the bottom of the PE 2 via a diode, the R2 is connected with the bottom of the R1 via a wire, the left end of the PE 3 switch is connected with the bottom of the PE 2 switch, the PE 3 switch is connected with the bottom of the C1 via a wire, the PE 2 is connected with the CP joint via a wire, the right end of the electric vehicle interface is provided with the electric vehicle interface, the electric vehicle is provided with the upper and lower side of the electric vehicle, the electric vehicle is respectively, the electric vehicle is connected with the electric vehicle, the electric connector, the left end and the electric connector is connected with the electric vehicle, the electric connector is the electric, and the electric vehicle and the electric connector is in the electric connector and the electric vehicle and the electric connector respectively, and the electric vehicle respectively. The bottom of the vehicle control device is respectively connected with the right end of the D1 diode and the right end of the CC joint through two groups of wires.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.

Claims

1. The utility model provides a charging device, its characterized in that, the device includes power cord interface and control box, the power cord interface matches with charging plug, the power cord interface when charging with the control box links to each other, through the control box charges for the target vehicle, wherein:

the second interface comprises a second input main loop;

2. The charging device according to claim 1, wherein the sampling unit includes an optocoupler that samples the input signal of the connection unit by controlling the secondary side to be turned on when charging.

3. The charging device according to claim 1, further comprising an over-temperature protection circuit, wherein the over-temperature protection circuit is disposed at an output end of the control box, is connected to the charging main circuit in a serial manner, and is connected to the control box, the over-temperature protection circuit comprises a temperature detection module and a control switch, the control switch is used for controlling on-off of the charging main circuit, the temperature detection module is used for detecting a temperature of the output end and sending the temperature to the control unit, and the control unit turns off the control switch when determining that the temperature is greater than a preset temperature threshold.

4. The charging device of claim 1, wherein the control box further comprises a leakage current protector connected to the charging main circuit.

5. The charging device of claim 1, further comprising a sound emitting module coupled to the control unit, the control unit configured to control the sound emitting module to send a voice prompt.

6. The charging device of claim 1, further comprising a wireless communication device through which the charging device communicates with a client.

7. The charging device according to claim 1, wherein the connection unit is connected to a live wire of the power line.

8. The utility model provides a charging device, its characterized in that, the device includes control box and a plurality of power cord interface, and is a plurality of the power cord interface matches with a plurality of charging plug respectively, every when charging the power cord interface with the control box links to each other, through the control box charges for the target vehicle, wherein:

9. The charging device according to claim 8, wherein the control unit includes a plurality of comparators and switching devices connected to the comparators, each of the comparators is connected to the sampling unit, and each of the comparators controls on/off of the switching devices according to a comparison result of an input voltage and a preset voltage threshold value, so as to adjust a charging current of the charging main circuit.

10. A charging system comprising a charging plug, a power cord connected to the charging plug, and a charging device according to any one of claims 1-7 or claims 8-9, a vehicle charging interface, the charging device being disposed intermediate the power cord and the vehicle charging interface.