CN205004775U - Electric automobile of function stake of charging of charging of integrated alternating current -direct current - Google Patents

Abstract

At present, most of the existing off-board charging piles for electric vehicles at home and abroad are divided into two different types: AC low-power slow charging and DC high-power fast charging. The AC low-power slow charging type cannot be quickly charged due to its insufficient output power; while the DC high-power fast charging type, although its output power is larger than the AC slow charging type, is sufficient to ensure that the vehicle can be fully charged quickly, but the battery life is correspondingly The losses are also large. This patent is based on the shortcomings of the current existing charging piles, and designs an electric vehicle charging pile with integrated AC and DC charging functions. The design of the pile body is divided into public components, AC slow charging gas lines, and main control computer electrical lines. It is composed of four parts and the DC fast charging gas line, which can meet the charging needs in many cases.

Description

An electric vehicle charging pile with integrated AC and DC charging functions

technical field

This patent belongs to the field of new energy electric vehicle charging automation information control technology.

Background technique

At present, most of the existing off-board charging piles for electric vehicles at home and abroad are divided into two different types: AC low-power slow charging and DC high-power fast charging: for the AC low-power slow charging type, in Electric vehicle owners are short on time and need to quickly charge the battery of the vehicle to drive immediately, because of insufficient output power, they cannot meet it; for DC high-power fast charging, although its output power is larger than AC slow charging, it is enough to ensure rapid charging. Vehicles, however, have a relatively large loss of battery life. In addition, during the idle period when the power load is low, such as at night, the valley electricity charge is also lower than during the day. Therefore, at this time, instead of choosing DC fast charging, use AC slow charging. Charging the vehicle is even better. It can be seen that the existing non-vehicle charging piles, due to the separation of AC and DC charging output modes and output power, artificially isolate and divide charging piles with different charging speeds into different types, and the functions appear to be specific, so that it cannot Such opposing use requirements for the charging speed of the vehicle in these two different situations are met simultaneously.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and provide an electric vehicle charging pile with integrated AC and DC charging functions.

The purpose of the present invention is achieved through the following technical solutions.

An electric vehicle charging pile with integrated AC and DC charging functions is characterized in that it includes public components, an AC slow charging gas circuit, a main control computer electrical circuit and a DC fast charging gas circuit. in:

The public components are composed of electric vehicle charging pile shell, 380V three-phase four-wire AC input, power access line, contactor, lightning arrester, main control computer, man-machine interface, operation status indicator, temperature and humidity sensor, card reader , speaker and receipt printer. The arrester is connected to the input 380V three-phase four-wire AC, and the other end is grounded. The man-machine interface, operating status indicator light, temperature and humidity sensor, card reader, loudspeaker and ticket printer are respectively connected with the main control computer. These components are designed to multiplex AC and DC charging functions.

The AC slow charging gas line is sequentially connected by a leakage protector 1, a contactor, an electric energy meter, an AC charging control guide module and an AC charging gun; under the control of the main control computer, the AC slow charging function of the pile body is jointly realized.

The electrical circuit of the main control computer is sequentially connected by the leakage protector 3, the contactor, the power supply and the main control computer, and the main control computer acts as the monitoring center of the entire charging pile.

The DC fast charging gas line is sequentially connected by a leakage protector 2, a contactor, an electric energy meter, a high-power charger, a DC charging control and guiding module, and a DC charging gun.

The electrical design of the present invention is divided into different circuits according to functions, and the power input adopts 380V three-phase four-wire AC, and the AC slow charging function and the 220V AC power supply of the main control computer are obtained from one phase.

The AC slow charging gas line of the present invention is connected to any phase line and neutral line of the 380V three-phase four-wire AC input; the main control computer electrical circuit is connected to any phase line and neutral line of the 380V three-phase four-wire AC input; The DC fast charging gas line is connected to the three phase lines of the 380V three-phase four-wire AC input.

The present invention integrates AC slow charging and DC fast charging related electrical circuits and components in one pile at the same time, so as to support two different charging modes of AC slow charging and DC fast charging on the same pile.

According to the equipped AC and DC charging circuit components and software program design, the present invention can simultaneously charge two electric vehicles in parallel, one of which is connected to an AC charging gun for slow charging, and the other is connected to a DC charging gun fast charge.

The installation and implementation of the pile in the present invention can be tailored and highly configurable, that is, the AC slow charging and DC fast charging gas lines can be selected as needed, so that the fast and slow charging functions can be combined flexibly, which can not only realize the simultaneous charging described in this patent Electric vehicle charging piles with integrated AC and DC charging functions can also realize single AC or DC dedicated charging piles that are common at present.

The beneficial effects of the present invention are:

1. The electrical circuits and components related to AC slow charging and DC fast charging are integrated in one charging pile at the same time, so as to support both AC slow charging and DC fast charging on the same charging pile.

2. The installation and implementation of the charging pile can be tailored and highly configurable, that is, the AC slow charging and DC fast charging gas lines can be selected as needed, so that the fast and slow charging functions can be combined flexibly, which can not only realize the functions described in this patent Electric vehicle charging piles that integrate AC and DC charging functions at the same time can also realize single AC or DC dedicated charging piles that are common at present.

3. The other parts and circuits that realize the AC and DC charging functions are specially designed independently to improve independence and do not affect each other. They can work in parallel and perform slow and fast charging for two vehicles at the same time.

4. In order to achieve the purpose of full utilization, the shell of the charging pile, the power supply line, the lightning arrester, etc., as well as various peripheral components such as the card reader and the ticket printer are designed as common components, which are multiplexed for AC and DC charging functions.

Description of drawings

Fig. 1 is a diagram of the electrical connection structure of the overall components of the charging pile according to the present invention.

detailed description

As shown in Figure 1, the power supply input of the charging pile is provided by 380V three-phase four-wire AC. After the power supply is connected, it is first bypassed and grounded and equipped with a lightning arrester to protect the pile body components from high voltage caused by lightning strikes or grid fluctuations. Damage from transient overvoltages, etc. On the right side of the surge arrester bypass, the input 380V three-phase four-wire AC power is immediately shunted to three different independent electrical circuit branches of AC slow charging, main control computer and DC fast charging.

The AC slow charging gas line is responsible for realizing the AC output slow charging function. From the 380V three-phase four-wire system input AC, take any one of the three phase lines (L1 in Figure 1) and the neutral line (N in Figure 1) to obtain 220V single-phase AC to form the power supply input of the line. The input 220V single-phase alternating current first passes through a leakage protector, which is used to break off quickly when the output charging circuit leaks, so as to avoid damage to vehicles and personnel and adverse effects on pile components. The input 220V single-phase AC power then passes through a contactor shared by three electrical branches (the coil KM1 of this contactor is jointly installed with an emergency stop button exposed at a conspicuous position on the shell of the pile body, which jointly realizes that when the charging pile needs immediate charging in case of emergency Man-made stop operation, such as an accident such as an accidental fire on the power supply line outside, to protect the pile body, vehicles and personnel to manually cut off the power supply and stop the operation of the pile body for emergency defensive operations) contacts (K1 in Figure 1) , and after passing through an electric energy meter used to measure the output power consumption of AC slow charging, etc., the AC charging control realized in accordance with "GB/T20234.2-2011 Connecting Device for Conductive Charging of Electric Vehicles Part 2: AC Charging Interface" The monitoring of the guidance module (the function of the module is to interact with the on-board AC charger of the electric vehicle, responsible for measuring the voltage of the corresponding monitoring point, outputting the PWM signal of the maximum current value that can be provided, and performing the start-stop control of the charging output, etc.) and the main control connected to it Under the coordination of the computer, the electric energy is finally supplied from the power supply plug of the AC charging gun to the AC power receiving socket of the vehicle.

The power supply input of the electrical circuit of the main control computer is composed of 380V three-phase four-wire alternating current input from the pile body and any phase line and neutral line to obtain 220V single-phase alternating current. This single-phase AC first flows through a leakage protector, then through the contacts of the public contactor, and then enters a special power supply for the electrical circuit of the main control computer. After being adapted by this power supply, various DC currents of corresponding specifications are output after transformation. , used to drive the main control computer and other devices connected to it, such as sensors and peripherals (for the sake of brevity, the corresponding power supply connections are not drawn one by one in Figure 1). The core component of this electrical circuit is the main control computer, and the monitoring software program of the charging pile is installed in it, which is responsible for coordinating and dispatching the work and operation of the entire charging pile. charging and DC fast charging) electrical circuit charging operation; the input module (touch screen, keyboard keys) and display module (display) show the man-machine interface to the pile user to control the charging pile; the speaker broadcasts the real-time voice of the interface operation to the pile user Prompt; the card reader provides charging identity identification and billing account authentication services to pile users; the bill printer provides charging fee settlement voucher bill printing services to pile users; the operating status indicator light shows users the real-time working status of the pile intuitively; installed in The temperature and humidity sensor in the pile body measures the working environment temperature and humidity parameters of all electrical circuits and components inside the pile body in real time, and automatically takes corresponding protection measures when the parameters exceed the preset threshold, such as ordering the charging guidance control module to disconnect the output circuit when overheating , temporarily interrupt the charging service, etc.; the electric energy meter measures the charging output power consumption, current, voltage and power parameters in real time, and automatically executes protection actions when the parameters exceed the preset threshold. output.

The DC fast charging gas circuit is responsible for realizing the DC output fast charging function. The connection structure and component functions of this line are the same as those of the AC slow charging gas line before the high-power charger, except that the corresponding components are changed from single-phase to three-phase, and there is no other important difference. After the 380V three-phase four-wire AC power input by the pile body reaches the high-power charger, the charger converts the electric energy into DC power with the corresponding current and voltage to meet the charging needs of the vehicle according to the control commands issued by the main control computer connected to it. , from the power supply plug of the DC charging gun to the DC power socket of the vehicle. The DC charging gun also complies with "GB/T20234.3-2011 Electric Vehicle Conductive Charging Connecting Device Part 3: DC Charging Interface" and "GB/T27930-2011 Electric Vehicle Off-board Conductive Charger and Battery Management System The communication protocol of the DC charging control guide module is connected, and the embedded software and hardware system built in the module realizes the voltage measurement of the detection point based on the CAN bus and the vehicle BMS and the exchange of data messages of the charging control application protocol according to these two standards. , the module also reports the relevant vehicle charging demand and status data obtained interactively to the main control computer connected to it in real time.

Claims (2)

1. An electric vehicle charging pile with integrated AC and DC charging functions, characterized in that it includes public components, AC slow charging gas circuit, main control computer electrical circuit and DC fast charging gas circuit, wherein: The public components consist of electric vehicle charging pile housing, 380V three-phase four-wire AC power supply access line, contactor, lightning arrester, main control computer, man-machine interface, operating status indicator, temperature and humidity sensor, card reader, speaker It is composed of a receipt printer; the surge arrester is connected to the input 380V three-phase four-wire AC, and the other end is grounded, and the man-machine interface, operating status indicator light, temperature and humidity sensor, card reader, speaker and receipt printer are respectively connected to the main control computer; The AC slow charging gas line is sequentially connected by a leakage protector 1, a contactor, an electric energy meter, an AC charging control guide module and an AC charging gun; The electrical circuit of the main control computer is sequentially connected by leakage protector 3, contactor, power supply and main control computer; The DC fast charging gas line is sequentially connected by a leakage protector 2, a contactor, an electric energy meter, a high-power charger, a DC charging control and guiding module, and a DC charging gun. 2. An electric vehicle charging pile with integrated AC and DC charging functions according to claim 1, wherein the AC slow charging gas line is connected to any phase line and neutral line of the 380V three-phase four-wire AC input; The main control computer electrical circuit is connected to any phase line and the neutral line of the 380V three-phase four-wire AC input; the DC fast charging gas circuit is connected to the three phase lines of the 380V three-phase four-wire AC input.