WO2015074347A1

WO2015074347A1 - Charging pile apparatus and system, and charging method

Info

Publication number: WO2015074347A1
Application number: PCT/CN2014/071984
Authority: WO
Inventors: 殷树刚; 赵羡龙; 郭正雄; 徐鲲鹏; 胡宇宣; 何凡
Original assignee: 国家电网公司; 北京南瑞智芯微电子科技有限公司
Priority date: 2013-11-21
Filing date: 2014-02-11
Publication date: 2015-05-28
Also published as: CN104659849A

Abstract

A charging pile apparatus and system, and a charging method. The apparatus comprises a power supply unit (101), a direct-current charging unit (102), and a state monitoring unit (103). The power supply unit (101) is connected to the direct-current charging unit (102) to supply power to the direct-current charging unit (102). The state monitoring unit (103) is connected to the power supply unit (101) and the direct-current charging unit (102). The power supply unit (101) is used for receiving external power supply, and processing an input voltage and outputting a stable direct current. The direct-current charging unit (102) is used for receiving the direct current output by the power supply unit (101) and charging an externally-connected storage battery. The state monitoring unit (103) is used for acquiring state information of the power supply unit (101) and the direct-current charging unit (102), and monitoring a charging process of the direct-current charging unit (102). By means of the charging pile apparatus, the externally-connected storage battery can be directly charged.

Description

Charging pile device, system and charging method

The present invention relates to the field of power technology, and in particular to a charging pile device, system, and charging method. Background technique

In order to alleviate the constraints of resources and environment, respond to global climate change, promote the transformation of economic development mode, build a resource-saving and environment-friendly society, and enhance the capacity for sustainable development, China is vigorously strengthening energy conservation and emission reduction. The replacement of traditional street lights by LED street lights and the promotion of electric vehicles are all worthy of advocating ways to save energy. However, the promotion and popularization of electric vehicles nationwide is very limited. The main reason is that the lack of infrastructure, especially charging piles, and the serious lag in the construction of charging stations have made charging extremely inconvenient and directly lead consumers to recognize electric vehicles. Not too high. Moreover, in order to adapt to the current situation of AC power supply, most of the current electric vehicles, especially household electric vehicles, have on-board chargers, and the charging mode is shown in Figure 1. Since the charging of the battery for the electric vehicle requires an on-board charger, on the one hand, the on-board charger increases the cost and load of the electric vehicle. On the other hand, the on-board charger belongs to the harmonic source load, which generates harmonic currents to be injected into the utility grid, affecting the electric energy. quality. Summary of the invention

SUMMARY OF THE INVENTION The present invention is directed to overcoming the inconvenience of charging an electric vehicle in the prior art. According to one aspect of the present invention, a charging post apparatus is provided.

A charging pile device according to an embodiment of the invention includes: a power supply unit, a DC charging unit and a state monitoring unit, wherein the power supply unit is connected to the DC charging unit and supplies power to the DC charging unit, the condition monitoring unit and the power supply unit and the DC charging unit Connected

The power supply unit is configured to receive an external power supply, and process the input voltage to output a stable direct current;

The DC charging unit is configured to receive the DC power output by the power unit and charge the external battery; the condition monitoring unit is configured to collect state information of the power unit and the DC charging unit, and monitor the charging process of the DC charging unit.

Preferably, the charging pile device further comprises: a communication unit, configured to upload status information collected by the status monitoring unit, and receive a control instruction to control the power unit and the DC charging unit;

The communication unit is connected to the power supply unit, the DC charging unit, and the status monitoring unit.

Preferably, the charging pile device further comprises: a lighting unit;

The power unit provides a stable direct current to the lighting unit, and the condition monitoring unit is coupled to the lighting unit and collects status information of the lighting unit.

Preferably, the power supply unit comprises:

a voltage stabilizing module for regulating the obtained direct current;

A transformer module that receives stable DC power from the regulator module and converts the DC power into multiple operating voltages.

Preferably, the power supply unit further includes:

It is used to rectify the AC power provided by the external power supply, and transmit the DC power obtained after the rectification to the rectifier module of the voltage regulator module.

Preferably, the DC charging unit comprises:

a charging control module for determining a charging mode and controlling a charging process;

An overvoltage and overcurrent protection module for protecting a DC charging unit and an external storage battery when an overvoltage or overcurrent occurs during charging;

A metering and billing module for real-time metering, billing, and charging when charging an external battery.

Preferably, the condition monitoring unit comprises:

An information acquisition module for collecting power unit and DC charging unit status information; a charging status monitoring module for real-time monitoring of the charging process.

Preferably, the lighting unit is an LED street light.

Preferably, the power supply unit further comprises: an AC charging interface for providing an alternating current to the external device. The charging pile device of the embodiment of the invention can directly charge the battery of the electric vehicle by directly supplying the direct current to the external battery, without the need of the vehicle charger, so that the electric vehicle does not need to install the vehicle charger, thereby saving the production of the electric vehicle. cost.

SUMMARY OF THE INVENTION The present invention is directed to overcoming the inconvenience of charging an electric vehicle in the prior art. According to another aspect of the present invention, a charging pile system is proposed.

A charging pile system according to an embodiment of the invention includes: the charging pile device, DC power supply network and main station system;

The DC power supply network is used for rectifying and filtering the AC mains, and the obtained DC power is networked and DC power is supplied to the charging pile device;

The master station system is used to monitor the charging process of the charging battery device and the charging pile device for charging the external battery in real time.

The charging pile system of the embodiment of the invention directly supplies the external battery with DC power by establishing a DC power supply network, and can directly charge the battery of the electric vehicle without passing through the vehicle charger, so that the electric vehicle does not need to install the vehicle charger, thereby saving The production cost of electric vehicles.

SUMMARY OF THE INVENTION The present invention is directed to overcoming the inconvenience of charging an electric vehicle in the prior art. According to another aspect of the present invention, a charging method for a charging post is proposed.

A charging method for a charging post according to an embodiment of the invention includes:

Rectifying and filtering the AC mains to obtain DC power;

The obtained DC power is networked to form a DC power supply network;

The DC power supply network provides direct current for the above charging pile device connected;

When the charging condition is satisfied, the charging post device charges the external battery.

Preferably, the DC power supply network also supplies DC power to the lighting unit of the charging pile device.

Preferably, the method further comprises: incorporating electrical energy generated by the new energy generation into the direct current power supply network, wherein the new energy source comprises solar energy and wind energy.

The charging method of the charging pile according to the embodiment of the invention directly supplies the DC battery to the external battery by establishing the DC power supply network, and can directly charge the battery of the electric vehicle without passing through the vehicle charger, so that the electric vehicle does not need to be installed with the vehicle charger. Thereby saving the production cost of the electric vehicle.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention will be realized and attained by the <RTI

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. DRAWINGS

The drawings are used to provide a further understanding of the invention and constitute a part of the specification, The embodiments of the present invention are used to explain the present invention and are not intended to limit the invention. In the drawing:

1 is a schematic diagram of a charging mode of an electric vehicle in the prior art;

2 is a schematic view showing a first structure of a charging pile device according to an embodiment of the present invention;

3 is a schematic view showing a second structure of a charging pile device according to an embodiment of the present invention;

4 is a schematic structural view of an LED street light charging pile integrated device in the first embodiment; FIG. 5 is a charging working flow chart of the LED street light charging pile integrated device in the first embodiment; FIG. 6 is an integrated LED street light charging pile in the first embodiment; FIG. 7 is a schematic structural view of a charging pile system according to an embodiment of the present invention;

FIG. 8 is a flowchart of a charging pile charging method according to an embodiment of the present invention. The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the scope of the invention is not limited by the specific embodiments.

According to an embodiment of the present invention, a charging pile device is provided, and FIG. 2 is a schematic structural view of a charging pile device, including: a power supply unit 101, a DC charging unit 102, and a state monitoring unit 103, wherein:

The power supply unit 101 is configured to receive an external power supply, process the input voltage, and output a stable direct current, and connect the DC charging unit 102 to provide direct current to the DC charging unit 102. The externally supplied input voltage can be 220V/380V AC or 300V DC. The power supply unit 101 outputs a stable DC current regardless of whether the input voltage is AC or DC. The stabilized direct current output from the power supply unit 101 is mainly used to supply power to the DC charging unit 102. At the same time, the power supply unit 101 can also be provided with various working voltage interfaces for supplying power to other devices requiring DC power supply such as LED street lamps.

The DC charging unit 102 is configured to receive the DC power output by the power unit 101 and charge the external battery. The external battery includes an electric vehicle battery, an electric motorcycle battery, and an electric bicycle battery. When the battery of the electric vehicle or the electric bicycle needs to be charged, the battery is directly connected to the DC charging unit 102, so that the electric vehicle does not need the built-in charging device. The battery of the electric vehicle can be charged.

When the DC charging unit 102 is charged to the external battery, it is first determined whether the charging condition is satisfied, for example, whether the connection between the external battery and the DC charging unit 102 is normal, and the user charges the IC card balance. Whether it is sufficient, etc., when all the charging conditions are satisfied, the DC charging unit 102 starts to prepare to charge the battery. The DC charging unit 102 includes two charging modes: a real-time charging mode and a timing charging mode. In the real-time charging mode, after the external battery is connected to the DC charging unit 102, the DC charging unit 102 immediately starts charging the external battery. The timed charging mode is the time when the user selects to start charging. At the selected time, the DC charging unit 102 starts again. Charge the external battery. Among them, the timing charging mode is mainly convenient to use the peak-valley electricity price for charging, and generally chooses to use the low-valley electricity price after 12 o'clock at night for charging, thereby avoiding the peak power consumption and saving the electricity cost for the user.

The status monitoring unit 103 is connected to the power supply unit 101 and the DC charging unit 102 for collecting status information of the power supply unit 101 and the DC charging unit 102, and monitoring the charging process of the DC charging unit 102. The state monitoring unit 103 monitors the input voltage and the output voltage of the power supply unit 101 in real time, and monitors the state information of the DC charging unit 102 in real time; in particular, when the DC charging unit 102 is used to charge an external battery, the state monitoring unit 103 monitors the charging voltage in real time. And charging current and battery voltage of the external battery, and returning the collected charging voltage and charging current to the DC charging unit 102, so that the DC charging unit 102 can determine whether to continue charging the external battery.

In the embodiment of the present invention, the charging pile device outputs a stable DC voltage to supply power to an external device that needs direct current, so that the external device does not need an additional rectifying and filtering module, thereby reducing the number of AC/DC conversions and improving energy utilization; When the external electric vehicle is charged, the battery of the electric vehicle can be directly charged, and the electric vehicle does not need to be installed with the vehicle charger, so that the production cost of the electric vehicle is saved, and the weight of the electric vehicle is reduced. Can be reduced.

Preferably, as shown in FIG. 3, the charging post device further includes: a communication unit 104. The communication unit 104 is connected to the power supply unit 101, the DC charging unit 102, and the status monitoring unit 103 for uploading status information acquired by the status monitoring unit 103, and receives control commands for controlling the power unit 101 and the DC charging unit 102.

Specifically, the communication unit 104 uploads information to the primary station system by using a wireless communication manner: real-time uploading status information of the power supply unit 101 and the DC charging unit 102, and uploading the battery charging status in real time when the DC charging unit 102 charges the external battery. When the power unit 101 also supplies power to other devices that require DC power supply, the communication unit 104 can also upload in real time. Information that powers the device. At the same time, the communication unit 104 also receives a control command issued by the main station system for controlling the output voltage of the power supply unit 101 and controlling whether the DC charging unit 102 supplies power to the external battery. The unified management and monitoring of the charging pile device by the primary station system can be realized by the communication unit 104.

Preferably, as shown in FIG. 3, the above apparatus further includes: a lighting unit 105. Power unit

101 provides DC power to the lighting unit 105, while the state monitoring unit 103 is connected to the lighting unit 105 and collects state information of the lighting unit 105. The communication unit 104 uploads state information of the lighting unit 105 and receives a control command by controlling the operating voltage of the power unit 101. The output interface controls the on and off of the lighting unit 105.

The lighting unit 105 can be specifically an LED street lamp. Since the power supply unit 101 directly supplies direct current to the LED street lamp, the charging post device provided by the embodiment does not require a rectifying and filtering module, and on the one hand, simplifies the structure of the LED street lamp. The cost is saved, and on the other hand, the energy loss during the internal rectification process of the LED street lamp is avoided. The integration of the LED street lamp charging pile can be realized by adding the lighting unit 105.

Preferably, the power supply unit 101 further includes an AC charging interface to provide an AC voltage to the external device. An electric car with a car charger can also charge the battery through the AC charging interface. Charging the battery by the in-vehicle charger is a prior art and will not be described in detail herein.

The structure of the charging post device and the charging process of the charging post device will be described in detail below through the first embodiment.

Embodiment 1

In the first embodiment, the illumination unit 105 is an LED street lamp, and the device provided in the first embodiment is an LED street lamp charging post integration device.

The structure of the LED street light charging pile integrated device is shown in Figure 4.

The power supply unit 101 includes a voltage stabilizing module 1011 and a voltage transforming module 1012. The voltage stabilizing module 1011 is configured to perform voltage stabilization processing on the obtained direct current power. The voltage transforming module 1012 is configured to receive the stable direct current power output by the voltage stabilizing module 1011, and convert the direct current power. For multiple sets of operating voltages, the DC charging unit 102 and the control circuitry of each unit are powered. When the external power supply is 300V DC, the power supply unit 101 directly performs voltage regulation and voltage transformation processing through the voltage stabilization module 1011 and the transformer module 1012 to obtain multiple sets of different operating voltages; when the external power supply is 220V/380V AC power, the power supply unit 101 further includes a rectifier module 1013, and the rectifier module 1013 first receives the received 220V/380V The alternating current is rectified, and the direct current obtained by the rectification is further regulated and transformed by the voltage stabilizing module 1011 and the transformer module 1012.

The power supply unit 101 further includes a protection module 1014 for protecting the power supply unit 101 when a surge or short circuit occurs.

Specifically, the voltage regulator module 1011 may be a voltage regulator, the transformer module 1012 may be a transformer, and the protection module 1014 may be a lightning protection device or a circuit breaker. The circuit structure is a prior art and will not be described in detail herein.

The DC charging unit 102 includes a charging control module 1021, an overvoltage and overcurrent protection module 1022, and a metering and accounting module 1023. The charging control module 1021 is configured to determine a charging mode and control a charging process. The overvoltage and overcurrent protection module 1022 is configured to protect the DC charging unit 102 and the external battery when an overvoltage and overcurrent phenomenon occurs during charging, and the metering and charging module 1023 Used for real-time metering, billing and charging when charging external batteries. The charging control module 1021 and the metering and billing module 1023 are all composed of an ARM chip and peripheral circuits. The overvoltage and overcurrent protection module 1022 is mainly a lightning protection device, and the circuit structure thereof is prior art, and the details are not detailed here. Said.

The charging control module 1021 first determines the charging mode according to the user's selection. The charging mode includes a real-time charging mode and a timed charging mode, and starts charging the external battery when all charging conditions are met. During charging of the external battery, the charging control module 1021 obtains the charging voltage, the charging current, and the battery voltage of the external battery in real time, and the charging current and the battery voltage or whether to continue charging the external battery according to the system command. The metering module 1023 periodically charges and charges based on the charging voltage and the charging current, and deducts the fee in the user charging IC card.

The status monitoring unit 103 includes an information collecting module 1031, an LED street light monitoring module 1032, and a charging status monitoring module 1033. The information collecting module 1031 is configured to collect state information of the power unit 101, the DC charging unit 102, and the lighting unit 105. The LED street lamp monitoring module 1032 is configured to control the switching of the lighting unit 105, and can return to the LED according to the control command received by the communication unit 104. The state of the street light; the state of charge monitoring module 1033 is used to monitor the charging process in real time. The state monitoring unit 103 is mainly composed of an ARM chip, a sensor and peripheral circuits, and its structure is also a prior art, which will not be described in detail herein.

The communication unit 104 includes: a transmitting module 1041 and a receiving module 1042. The sending module 1041 is configured to upload the power unit 101, the DC charging unit 102, and the lighting unit 105 to the primary station system in real time. Status information, real-time upload status information of the battery charging process; the receiving module 1042 is configured to receive a control command issued by the main station system, used to control the output voltage of the power unit 101, control whether the DC charging unit 102 is powered by the battery, and control the lighting The unit 105 is switched on and off.

In the first embodiment, the charging pile device and the LED street lamp are integrated, and the function of charging the electric vehicle for the electric vehicle and the function of the street lamp lighting can be realized at the same time, the resources of the charging pile device are effectively utilized, and the laying of the LED street lamp line is reduced. The power supply unit 101 directly outputs DC power for the LED street lamp. Therefore, the LED street lamp does not require a rectification and filtering circuit module, which not only simplifies the structure of the LED street lamp, but also solves the problem that the conventional LED street lamp rectifier is fragile.

The structure of the charging post device in the first embodiment is described in detail above. The charging work flow of the charging post device will be described below.

Referring to Figure 5, the charging workflow of the charging pile device is as follows:

Step 201: Determine whether the charging connection is normal. When the charging connection is normal, proceed to step 202, otherwise continue to step 210.

Step 202: Determine whether to insert the charging IC card. When the charging IC card has been inserted, proceed to step 203, otherwise continue to step 210.

Step 203: Determine whether the balance in the charging IC card exceeds the minimum charging amount. When the balance exceeds the minimum charging amount, proceed to step 204, otherwise proceed to step 211.

Step 204: The DC charging unit charges the battery of the electric vehicle.

Step 205: Measure and acquire the charging voltage, the charging current, and the battery voltage.

When the DC charging unit charges the battery, the charging voltage is the voltage across the DC charging unit, and the charging voltage remains unchanged during the charging process; the charging current is the current of the charging circuit; and the battery voltage is the voltage across the battery. When charging the battery at the beginning, the voltage value of the battery voltage is low. Since the charging voltage remains unchanged, the current value of the charging current is large. As the DC charging unit continues to charge the battery, the voltage value of the battery voltage is higher and higher. , the corresponding charging current will be smaller and smaller.

Step 206: When the charging time reaches the preset period, calculate the charging fee of the current period, and deduct the charging fee from the charging IC card.

The preset period can be specifically set to 30S or 60S. Taking the preset period of 60S as an example, when the charging time of the DC charging unit charging the battery of the electric vehicle reaches 60S, the charging pile The device calculates the charging fee for the period based on the charging voltage and the charging current in the 60S, and deducts the charging fee from the charging IC card. At the same time, when the charging time reaches the preset period, the charging time is cleared and re-timed, and the charging process is repeated again when the charging time reaches the next cycle and the above charging process is repeated.

Step 207: Determine whether the battery voltage is higher than the preset voltage value. When the battery voltage is higher than the preset voltage value, proceed to step 208, otherwise continue to step 203.

Step 208: Determine whether the charging current is less than the preset current value. When the charging current is less than the preset current value, proceed to step 209, otherwise continue to step 203.

Step 209: Prompt charging is completed and charging is ended.

Step 210: Do not charge.

Step 211: Prompt that the balance is insufficient and end charging.

Prior to step 204, it may also be determined whether to continue charging the battery of the electric vehicle based on the charging mode selected by the user. For example, if the user selects the real-time charging mode, step 204 is performed immediately; if the user selects the timed charging mode, step 204 is performed when the time set by the user is reached.

In the first embodiment, the charging pile device first determines whether the condition for charging the external battery is satisfied. When all the conditions are met, the DC charging unit 102 directly charges the battery of the electric vehicle, and does not need to pass the vehicle charger, so that the electric vehicle does not need to be installed on the vehicle. The machine saves the production cost of the electric vehicle; and the electric vehicle is lighter in weight and consumes less energy.

In the first embodiment, the integration of the LED street lamp and the charging post is realized, and the working process of the LED street lamp is described in detail below.

Referring to Figure 6, the workflow of the lighting unit is as follows:

Step 301: The communication unit receives a control instruction from the primary station system.

Step 302: Determine whether the control command is an LED switch command. When the control command is an LED switch command, proceed to step 303. Otherwise, proceed to step 308.

Step 303: Determine whether the LED switch command is an LED ON command. When the LED switch command is an LED ON command, proceed to step 304. Otherwise, proceed to step 306.

Step 304: Turn on the LED street light.

Step 305: After waiting for 60S, determine whether the LED street light is turned on. If the LED street light is turned on, proceed to step 309, otherwise continue to step 304. Step 306: Turn off the LED street light.

Step 307: After waiting for 60S, judge whether the LED street light is off. If the LED street light is off, proceed to step 309, otherwise continue to step 306.

Step 308: Determine whether the control instruction is an LED status query instruction. When the control instruction is an LED status inquiry instruction, proceed to step 309.

Step 309: Send the status of the LED street light to the primary station system through the communication unit.

In the first embodiment, the LED street lamp waits for the control command of the main station system to perform unified switch management, and the main station system can control the switch of the LED street lamp through the communication unit, and can query the status of the LED street lamp in real time. For example, the main station system controls the LED street lights to adopt different switching times in different seasons. In the same season, the switching time can be adjusted by the different weather conditions. In addition, the smog conditions in big cities such as Beijing and Shanghai are very serious and can be obvious. It affects visibility and can also manage this maneuver. In addition, the state monitoring unit 103 is used to monitor the LED street light switch to realize a closed loop control loop, and the master station system can also timely understand the switching status of the LED street light.

The embodiment of the present invention further provides a charging pile system. As shown in FIG. 7, the charging pile system includes: a low voltage DC power supply network 41, a charging pile device 42 and a main station system 43, wherein:

The low-voltage DC power supply network 41 is used for rectifying and filtering the AC mains, and the obtained DC power is networked and DC power is supplied to the charging pile device 42;

The charging pile device 42 is the above-mentioned charging pile device, specifically for obtaining the direct current power provided by the low-voltage DC power supply network 41, and charging the external battery after the voltage-stabilizing voltage-changing process; the charging pile device 42 also uploads the status information to the primary station. System 43 receives the control command issued by the primary station system 43;

The master station system 43 is used for real-time monitoring of the charging pile device 42 and the charging pile device 42 for charging the external battery, and the master station system 43 is also used to issue control commands to the charging pile device 42.

The low voltage DC power supply network 41 converts 220 V/380 V AC power to DC power, or a low voltage DC power supply network 41 provides low voltage DC power to the charging pile device 42.

Preferably, the charging post device 42 includes a lighting unit. The lighting unit may specifically be an LED street lamp, thereby realizing the integration of the LED street lamp charging pile.

The charging pile system provided by the embodiment of the invention firstly rectifies and filters the AC mains, and the obtained DC power is networked to obtain a low-voltage DC power supply network, which is powered by a low-voltage DC power supply. On the basis of the net, the charging pile device is directly powered, and the electric energy generated by the new energy source such as solar energy or wind energy can also be incorporated into the above-mentioned low-voltage DC power supply network, thereby supplying power to the charging pile. The above charging pile system reduces the frequency of AC/DC conversion by centralized rectification filtering, thereby improving conversion efficiency and improving energy utilization rate. At the same time, the charging pile device does not require an additional rectifying and filtering module, which can reduce the cost and simplify the structure while reducing the structure. failure rate. The integration of LED street light charging posts can also be achieved by adding lighting units.

According to an embodiment of the present invention, a charging method of a charging pile is provided. The charging charging method is shown in FIG. 8 , and the charging procedure is as follows:

Step 501: Perform rectification and filtering on the AC mains to obtain DC power.

Step 502: Networking the obtained DC power to form a low-voltage DC power supply network.

Step 503: The low voltage DC power supply network supplies DC power to the connected charging pile device.

Step 504: When the charging condition is satisfied, the charging post device charges the external battery. Preferably, the charging pile provided by the method further comprises a lighting unit; in step 503, the low voltage DC power supply network further supplies direct current to the lighting unit. Specifically, the lighting unit is an LED street light. The charging pile combines the functions of lighting and charging to realize the integration of LED street lamp charging piles.

In step 501 and step 502, new energy sources such as solar energy or wind energy can also be converted into suitable direct current power, and then the electric energy generated by the new energy power generation can be integrated into the low-voltage direct current power supply network, and the power supply of new energy such as solar energy or wind energy is limited. External energy conditions allow new energy generation to be stored. The charging pile device has a plurality of charging modes, and after the user selects the charging mode, the charging pile device can charge the battery.

The charging method of the charging pile provided by the embodiment of the invention provides a DC power supply for the charging pile based on the established low-voltage DC power supply network. Therefore, the charging pile device does not need an additional rectifying and filtering module, which can reduce the cost and simplify the structure. It can reduce the failure rate; at the same time, the number of AC/DC conversions can be reduced by establishing a low-voltage DC power supply network, thereby improving conversion efficiency and improving energy utilization.

The present invention can be embodied in a variety of different forms. The technical solutions of the present invention are illustrated by taking the example of FIG. 2 to FIG. 8 as an example, which does not mean that the specific examples applied to the present invention can be limited to In the specific process or embodiment structure, those skilled in the art will appreciate that the specific embodiments provided above are only a few examples of various preferred uses, and any embodiment embodying the claims of the present invention should be in the present invention. Claimed by the technical solution Within the scope.

It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art The technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A charging pile device, comprising: a power supply unit, a DC charging unit, and a condition monitoring unit, wherein the power supply unit is connected to the DC charging unit and supplies power to the DC charging unit, a state monitoring unit is connected to the power supply unit and the DC charging unit; the power supply unit is configured to receive an external power supply, and process the input voltage to output a stable direct current;

The DC charging unit is configured to receive DC power output by the power unit and charge an external battery;

The state monitoring unit is configured to collect state information of the power supply unit and the DC charging unit, and monitor a charging process of the DC charging unit.

2. The device according to claim 1, further comprising:

a communication unit, configured to upload status information collected by the status monitoring unit, and receive a control instruction to control the power unit and the DC charging unit;

The communication unit is coupled to the power supply unit, the DC charging unit, and the status monitoring unit.

The device according to claim 1 or 2, further comprising: a lighting unit; the power supply unit provides stable direct current to the lighting unit, and the state monitoring unit is connected to the lighting unit and collects Status information of the lighting unit.

The device according to claim 1, wherein the power supply unit comprises: a voltage stabilizing module for performing voltage stabilization processing on the obtained direct current power;

And a transformer module that receives the stabilized direct current output from the voltage stabilizing module and converts the direct current into a plurality of working voltages.

The device of claim 4, wherein the power supply unit further comprises: rectifying the alternating current provided by the external power supply, and transmitting the rectified direct current to the rectifying module Module.

6. The apparatus according to claim 1, wherein the DC charging unit comprises: a charging control module for determining a charging mode and controlling a charging process;

An overvoltage and overcurrent protection module for protecting the DC charging unit and the external battery when an overvoltage and overcurrent phenomenon occurs during charging;

Metering and billing module for real-time metering, billing and charging when charging external batteries Piece.

The device according to claim 1, wherein the state monitoring unit comprises: an information collecting module for collecting state information of the power source unit and the DC charging unit;

A state of charge monitoring module for real-time monitoring of the charging process.

8. The device according to claim 3, wherein the lighting unit is an LED street light.

The device according to any one of claims 1 to 4, wherein the power supply unit further comprises: an AC charging interface for providing an alternating current to the external device.

A charging pile system, comprising: the charging pile device according to any one of claims 1-9, a DC power supply network, and a master station system;

The DC power supply network is configured to perform rectification and filtering on the AC mains, network the obtained DC power, and provide DC power to the charging pile device;

The primary station system is configured to monitor in real time the charging process of the charging pile device and the charging pile device for charging an external battery.

1 1. A charging method for a charging pile, characterized in that it comprises:

Rectifying and filtering the AC mains to obtain DC power;

The obtained DC power is networked to form a DC power supply network;

The DC power supply network provides direct current for the charging pile device according to any one of claims 1-9;

12. The method of claim 1 1 , wherein

The DC power supply network also provides direct current to the lighting unit included in the charging pile device.

13. The method of claim 1 1 , further comprising: incorporating electrical energy generated by a new energy source into the DC power supply network, the new energy source comprising solar energy and wind energy.