WO2018149153A1

WO2018149153A1 - Flexible charging control system and method, and flexible charging system

Info

Publication number: WO2018149153A1
Application number: PCT/CN2017/104980
Authority: WO
Inventors: 陈炯; 吴广涛; 强金星; 徐红刚
Original assignee: 上海蔚来汽车有限公司
Priority date: 2017-02-16
Filing date: 2017-09-30
Publication date: 2018-08-23
Also published as: CN106849237A; CN106849237B

Abstract

A flexible charging control system and method, and a flexible charging system. The flexible charging control system comprises: a central control module (101) and a flexible configuration module (102). The central control module (101) is configured to acquire charging requirement information, and to generate control information about a charging unit (201) and the flexible configuration module (102) based on a pre-set control strategy. The flexible configuration module (102) is configured to assemble outputs of different chargers in the charging unit (201) according to control information about the central control module (101) and then supply same to a device to be charged. The present invention solves the problem that an existing control system cannot be applied to an electric vehicle battery swapping station and an electric vehicle charging station at the same time.

Description

Flexible charging control system and method, flexible charging system

Technical field

The present invention relates to the field of electric vehicle technology, and more particularly, to a flexible charging control system and method, and a flexible charging system.

Background technique

At present, electric energy for electric vehicles can be completed by changing power stations and charging stations. The power exchange is to quickly replenish the electric vehicle by replacing the vehicle battery box. The replaced battery box is charged on the battery rack through the charger for reuse. The charging station generally outputs power to a plurality of split type fast charging guns through a combination of a plurality of chargers, thereby realizing dynamic charging of a plurality of electric vehicles.

Among them, the replacement time of the power station is faster, but the construction cost of the power-changing equipment is generally higher, and the operational reliability depends on the reliability of the power-changing equipment. The recharging time of the charging station is longer than that of the power station. However, since there is no need to change the electric equipment, the cost is relatively low. The operation is mainly based on the insertion and removal of the fast charging gun, and the stability is good. Therefore, considering different application scenarios, the power station and the charging station need to be configured according to actual needs. However, the current control system cannot be applied to both the power station and the charging station, so the control systems of the power station and the charging station need to be separately designed, which undoubtedly greatly increases the development and production costs.

Energy storage power stations can achieve peak utilization of the grid and efficient use of renewable energy. The electrical circuit of the energy storage power station is basically the same as the electrical circuit of the power exchange. The only difference is that the energy storage power station needs to realize the two-way flow of electric energy. Therefore, the one-way charger of the power grid to the battery should be replaced with a two-way charge and discharge machine. Therefore, the flexible charging control system and method in the power station and charging station of the present invention, and the flexible charging system can also be applied to the energy storage power station.

Summary of the invention

In order to solve the above problems in the prior art, it is to solve the problem that the existing control system cannot be simultaneously applied to the power station and the charging station. The invention provides a flexible charging control system, which comprises: a central control module and a flexible configuration module; a central control module, configured To obtain charging demand information, and generate control information of the charging unit and the flexible configuration module based on a preset control strategy; the flexible configuration module is configured to group the outputs of the different charging units in the charging unit according to the control information of the central control module. After being supplied, the device to be charged is supplied.

Preferably, the central control module includes an information processing unit, a demand information receiving unit, and a control information sending unit; the demand information receiving unit is configured to receive charging demand information; and the information processing unit is configured to receive according to the preset control policy according to the received The charging demand information generates charging unit control information and control information of the flexible configuration module; the control information sending unit is configured to send control information to the corresponding charging unit and the flexible configuration module.

Preferably, the flexible configuration module comprises a switch array, a switch array controller for controlling the switch array, and a switch array controller configured to receive control information sent by the control information sending unit and to control the input and output interfaces of the switch array The switch relationship is configured to combine the input interface and the output interface according to the control command of the switch array controller, and the input interface of the switch array is used for separately performing the output of each charger in the charging unit. Connected, the output interface of the switch array is used to connect to the device to be charged.

Preferably, the combination relationship between the input interface and the output interface of the switch array is: according to the output interface of the selected switch array and the charging parameter of the device to be charged, the determined switch array is determined to be a composition The electrical circuit needs to be set in a combination of switch states.

Preferably, the connection of any one or more input interfaces of the switch array to any of the output interfaces is performed by a combination of the switch states.

Preferably, the control system further includes a charging control module for collecting charging information of the device to be charged; the demand information receiving unit is connected to the charging control module through the communication line, and obtains charging information of the device to be charged as charging demand information.

Preferably, the central control module further comprises an input device for inputting the assembly mode, and the information processing unit is connected to the input device via the communication line to acquire the input combination mode.

Preferably, the communication line is a CAN bus.

Accordingly, the present invention also provides a flexible charging control method comprising the following steps:

Step 1, based on the preset control strategy, determining the number N of chargers to be assembled according to the acquired charging demand information; and step 2, selecting N chargers for the combined output, and charging the charging device.

Preferably, N chargers are selected for the combined output, wherein the output is assembled by assembling the outputs of the selected N chargers through the switch array and outputting the assembled electrical energy.

Preferably, the charging demand information includes a state of charge of the device to be charged.

Preferably, the device to be charged is a power battery of an electric vehicle or an energy storage battery in a power station or an energy storage power station.

At the same time, the present invention also provides a flexible charging system comprising the above flexible charging control system and a charging unit composed of two or more chargers; the control end of the charging machine and the control information transmitting unit through the communication line Connecting, receiving control information sent by the control information sending unit and performing corresponding actions; the output end of the charger is electrically connected to the power input port set in the flexible configuration module, and the electrical connection is configured through the flexible configuration module. The circuit performs power output of a charger or a plurality of assembled chargers.

Preferably, the charging system further comprises a charging interface; the charging interface and the power input port provided in the flexible configuration module are single-connected through the power line for transmitting the electrical energy outputted by the switch array assembly to the device to be charged.

Preferably, the charging system further comprises a charging information collecting interface for transmitting charging information of the device to be charged, and the charging information collecting interface and the charging interface are integrated into one charging port connector.

Preferably, the charging port connector is configured to be electrically and communicatively connected to the battery and the BMS of the device to be charged, respectively.

Preferably, the charging port connector is a fast charging plug conforming to the GB/T 20234.3 standard.

Preferably, the charging system further includes a charger power supply unit for inputting power to the charger.

The invention determines the number N of chargers to be assembled according to the acquired charging demand information based on the preset control strategy; then selects N chargers for the combined output to charge the charging device. It realizes that for different devices to be charged, the charger can be charged in different ways according to different charging demand information, and can be adjusted by adjusting The number of chargers is adjusted to adjust the charging speed, which can be applied to electric vehicle charging stations, power exchange stations and energy storage power stations at the same time, which saves the development and production costs of charging stations, power exchange stations and energy storage power station control systems.

DRAWINGS

1 is a schematic structural view of a flexible charging control system in the present invention;

2 is a schematic structural view of a flexible charging system in the present invention;

3 is a schematic flow chart of a flexible charging control method in the present invention.

detailed description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the scope of the present invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a flexible charging control system according to the present invention. The specific structure includes:

The central control module 101 and the flexible configuration module 102. The central control module 101 includes an information processing unit 1011, a demand information receiving unit 1012, and a control information transmitting unit 1013. The demand information receiving unit 1012 is configured to receive charging demand information; the information processing unit 1011 is configured to generate charging unit control information and control information of the flexible configuration module 102 according to the received charging demand information based on a preset control policy; The information sending unit 1013 is configured to send control information to the corresponding charging unit and the flexible configuration module 102. The flexible configuration module 102 is configured to, according to the control information of the central control module 101, assemble the outputs of the different chargers in the charging unit and supply the devices to be charged.

Specifically, in this embodiment, the charging demand information includes a charging state of the device to be charged, and the preset control strategy follows the principle that when the charging state of the device to be charged is high, the charging unit is different. The output of the charger is assembled to charge the charging device at a lower power. When the state of charge of the device to be charged is low, the outputs of the different chargers in the charging unit are assembled to charge the device to be charged with higher power. Therefore, when there are many devices to be charged, the charging device can be charged according to specific needs, the charging efficiency is improved, and the investment cost of the charger is reduced.

The acquisition of the charging requirement information is implemented by the charging control module 103 in this embodiment. The charging control module 103 is configured to collect charging information of the device to be charged. The demand information receiving unit 1012 is connected to the charging control module 103 through a communication line, and acquires charging information of the device to be charged as charging demand information.

In order to further improve the reliability of the system, the charging demand information may further include a maximum charging power allowed by the device to be charged and a minimum charging power. After the outputs of the different chargers in the charging unit are assembled, it is necessary to ensure that the output power is between the maximum charging power allowed by the device to be charged and the minimum charging power.

For the assembly mode, this embodiment is implemented by changing the number of chargers that are charged. Specifically, after obtaining the state of charge of the device to be charged, the central control module 101 determines the number of chargers to be input according to the state of charge of the device to be charged, and the principle followed is that when the state of charge of the device to be charged is compared When the battery is charged at a high time, the charger is charged, and when the state of charge of the device to be charged is low, more chargers are put in.

In this embodiment, the flexible configuration module 102 includes a switch array 1021, a switch array controller 1022 for controlling the switch array 1021, and an input interface of the switch array 1021 for respectively performing a change in the number of charged charging devices. A single connection is made to the output of each charger in the charging unit, and the output interface is used to connect to the device to be charged. The switch array controller 1022 is configured to receive the control information sent by the control information sending unit 1013, and control the combination relationship between the input interface and the output interface of the switch array 1021; the switch array 1021 is configured to be controlled according to the switch array controller 1022. The command combines the input interface and the output interface to achieve a determined number of chargers to charge the charging device. In this embodiment, according to the output interface of the selected switch array 1021 and the charging parameter of the device to be charged, the determined switch state is determined in the switch array 1021 which is determined to be a corresponding switch circuit state. The combination of the switch states performs a connection of any one or more input interfaces of the switch array 1021 to any of the output interfaces.

In addition, in order to further improve the practicability of the system, the central control module 101 further includes an input device 1014 for inputting an assembly mode, and the information processing unit 1011 is connected to the input device 1014 through a communication line to acquire the input combination mode. The input device 1014 can be a touch screen type input device or a push button type input device. Of course, it can be understood that the embodiment is not limited. The specific style of the input device 1014 is determined. The input device 1014 allows the user to specify the combination mode according to specific needs. For example, the state of charge of the device to be charged is very high. At this time, charging is performed with a smaller power according to the default combination mode, and when the user desires to charge at a relatively high power in this case, the input device can be passed. 1014 Enter the combination mode that you need. At this time, the system will match the charger according to the combination mode input by the user to charge the device to be charged.

The central control module 101 can also calculate the amount of power consumed during the charging process by monitoring the entire charging process, and calculate the specific cost generated by the charging process according to the consumed power. And when the charging control system is disposed in the power substation, the central control module 101 can also be used to manipulate the power changing device in the power station to locate the power changing vehicle, and operate the power changing device to perform the power switching operation on the power changing device. .

In this embodiment, the communication lines between the modules and the units are CAN buses. Of course, it can also be other communication lines such as wireless communication lines. It will of course be understood that this embodiment does not limit the specific type of communication line.

The charging control system determines the number N of the chargers to be assembled according to the acquired charging demand information based on the preset control strategy; then selects N chargers for the combined output to charge the charging device. It realizes that different charging devices can be charged in different ways according to different charging demand information, and can be applied to electric vehicle charging stations, power exchange stations and energy storage power stations at the same time, saving charging. Development and production costs of control systems for stations, power stations and energy storage power stations.

Referring to FIG. 2, FIG. 2 is a schematic structural diagram of a flexible charging system according to the present invention. The specific structure includes the above flexible charging control system and a charging unit 201 composed of two or more chargers; control of the charger The terminal and control information transmitting unit 1013 is connected through the communication line, receives the control information sent by the control information transmitting unit 1013, and performs a corresponding action; the output end of the charger and the input interface of the switch array 1021 are electrically connected by a single connection.

The charging system further includes a charging interface 2021 and a charging information collection interface 2022. The charging interface 2021 and the output interface of the switch array 1021 are single-connected through the power line, and are used for transmitting the power outputted by the switch array 1021 to the device to be charged. The charging information collection interface 2022 is configured to transmit charging information of the device to be charged. The charging information collection interface 2022 is integrated with the charging interface 2021 as a charging port connector 202.

In actual use, when the charging system is deployed into the substation, the charging port connector 202 is configured to electrically and communicatively connect to the battery and BMS of the device to be charged, respectively. At this time, the charging port connector 202 can be connected to the battery and the BMS. When the electrical control system is disposed in the charging station, the charging port connector 202 is a fast charging plug conforming to the GB/T 20234.3 standard. At this time, the charging port connector 202 can be connected to the vehicle to be charged. Thereby, the charging system can be applied to both the charging station, the power station and the energy storage power station.

Further, the present charging system further includes a charger power supply unit 203 for inputting power to the charger. Specifically, the power supply unit 203 of the charger may be an external power supply line. Of course, considering the influence of the external power supply line on the power grid, the power supply unit 203 of the charger may also be a battery, so that the power can be stored in advance when the power grid pressure is small. In the battery, avoid the impact on the grid during large-scale charging. At the same time, the charger power supply unit 203 can also be a combination of an external power supply line and a battery. It should be understood that the embodiment does not limit the specific type of the power supply unit 203 of the charger.

The charging system determines the number N of chargers to be assembled according to the acquired charging demand information based on the preset control strategy; then selects N chargers for the combined output to charge the charging device. It realizes that different charging devices can be charged in different ways according to different charging demand information, and can be applied to electric vehicle charging stations, power exchange stations and energy storage power stations at the same time, saving charging. Development and production costs of control systems for stations, power stations and energy storage power stations.

Please refer to FIG. 3. FIG. 3 is a schematic flow chart of the flexible charging control method in the present invention, and the specific steps are as follows:

S301. Determine, according to the preset charging policy, the number N of chargers that need to be assembled according to the acquired charging demand information.

Specifically, in this embodiment, the charging demand information includes a charging state of the device to be charged, and the preset control strategy follows the principle that when the charging state of the device to be charged is high, less charging device is input. When the state of charge of the device to be charged is low, more chargers are put in. Therefore, when there are many devices to be charged, the input of the charger can be controlled in batches, the charging device is charged according to specific requirements, the charging efficiency is improved, and the investment cost of the charger is reduced.

In addition, in order to further improve the reliability of the method, the charging demand information may further include a maximum charging power allowed by the device to be charged and a minimum charging power. After the outputs of the different chargers in the charging unit are assembled, it is necessary to ensure that the output power is between the maximum allowable charging power and the minimum charging power of the device to be charged.

S302, N chargers are selected for the combined output, and the charging device is charged.

The selected N chargers are configured to perform output, wherein the output is assembled by combining the outputs of the selected N chargers through the switch array, and outputting the assembled power. The device to be charged is a power battery of an electric vehicle or an energy storage battery in a power station or an energy storage power station.

The invention determines the number N of chargers to be assembled according to the acquired charging demand information based on the preset control strategy; then selects N chargers for the combined output to charge the charging device. It realizes that different charging devices can be charged in different ways according to different charging demand information, and can be applied to electric vehicle charging stations, power exchange stations and energy storage power stations at the same time, saving charging. Development and production costs of control systems for stations, power stations and energy storage power stations.

Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims

A flexible charging control system, characterized in that the control system comprises a central control module and a flexible configuration module;

The central control module is configured to acquire charging demand information, and generate control information of the charging unit and the flexible configuration module based on a preset control policy;

The flexible configuration module is configured to supply the devices to be charged after the output of the different chargers in the charging unit is assembled according to the control information of the central control module.
The control system according to claim 1, wherein the central control module comprises an information processing unit, a demand information receiving unit, and a control information transmitting unit;

The demand information receiving unit is configured to receive charging demand information;

The information processing unit is configured to generate charging unit control information and control information of the flexible configuration module according to the received charging demand information based on a preset control policy;

The control information sending unit is configured to send control information to the corresponding charging unit and the flexible configuration module.
The control system according to claim 2, wherein said flexible configuration module comprises a switch array, a switch array controller for controlling said switch array;

The switch array controller is configured to receive control information sent by the control information sending unit, and control a combination relationship between the input interface of the switch array and the interface of the output end;

The switch array is configured to combine an input interface and an output interface according to a control instruction of the switch array controller, where the input interface of the switch array is used to separately perform a single connection with the output ends of each charger in the charging unit. Connected, the output interfaces of the switch array are respectively connected to the device to be charged.
The control system according to claim 3, wherein the combination relationship between the input interface and the output interface of the switch array is: according to the output interface of the selected switch array, and the charging parameter of the device to be charged The determined switchable array is a combination of switch states required to form a corresponding electrical loop.
The control system according to claim 4, wherein the connection of any one or more input interfaces of the switch array to any of the output interfaces is performed by a combination of the switch states.
The control system according to claim 5, wherein the control system further comprises a charging control module for collecting charging information of the device to be charged; the demand information receiving unit is connected to the charging control module via a communication line Obtaining charging information of the device to be charged as charging demand information.
The control system according to claim 6, wherein said central control module further comprises input means for inputting a combination mode, said information processing unit being connected to said input means via a communication line to obtain the input The way of assembly.
The control system according to any one of claims 1 to 7, wherein the communication line is a CAN bus.
A flexible charging system, characterized in that the charging system comprises the flexible charging control system according to any one of claims 1 to 8, and a charging unit composed of two or more chargers;

The control end of the charger is connected to the control information sending unit via a communication line, receives control information sent by the control information sending unit, and performs a corresponding action;

The output end of the charger is electrically connected to the power input port provided in the flexible configuration module by a single connection, and the electric circuit configured in the flexible configuration module is used to perform a charger or a plurality of assembled chargers. The power output.
The charging system according to claim 9, wherein the charging system further comprises a charging interface; the charging interface and the power output port disposed in the flexible configuration module are single-connected through the power line for the switch array group The outputted electrical energy is delivered to the device to be charged.
The charging system according to claim 10, wherein the charging system further comprises a charging information collecting interface for transmitting charging information of the device to be charged, and the charging information collecting interface is integrated with the charging interface as a charging port. Connector.
The charging system according to claim 11, wherein the charging port connector is configured to be electrically and communicably connected to a battery and a BMS of the device to be charged, respectively.
The charging system according to claim 11, wherein the charging port connector is a fast charging plug conforming to the GB/T 20234.3 standard.
The charging system of claim 9 wherein said charging system further comprises a charger power supply unit for inputting power to the charger.
A flexible charging control method, comprising the steps of:

Step 1, based on the preset control strategy, determining the number N of chargers that need to be assembled according to the acquired charging demand information;

In step 2, N chargers are selected for the combined output, and the charging device is charged.
The control method according to claim 15, wherein said selected N chargers perform a combined output, wherein the method of assembling the outputs is:

The outputs of the selected N chargers are assembled by the switch array, and the assembled power is output.
The control method according to claim 16, wherein the charging demand information includes a state of charge of the device to be charged.
The control method according to any one of claims 15 to 17, wherein the device to be charged is a power battery of an electric vehicle or an energy storage battery in a power exchange or energy storage power station.