Charging pile group parallel communication control device

Abstract

The utility model discloses a charging pile group parallel communication control device which comprises a mobile internet communication circuit, a WLAN communication circuit, an I2C integrated interconnection circuit, a CPU, an operation memory, a pile group cooperative control algorithm storage circuit, a first protocol conversion circuit, a second protocol conversion circuit, a first LAN RJ45 port, a second LAN RJ45 port, a first RS serial port and a second RS serial port. The mobile internet communication circuit and the WLAN communication module are connected with the I2C integrated interconnection circuit, the running memory is connected with the I2C integrated interconnection circuit, the CPU and the pile group cooperative control algorithm storage circuit are connected with the running memory, the first protocol conversion circuit and the second protocol conversion circuit are connected with the running memory, and the first protocol conversion circuit and the second protocol conversion circuit are connected with the I2C integrated interconnection circuit. According to the utility model, state monitoring and flexible scheduling of the whole charging pile group are realized, the interface can be compatible with various charging pile protocols, the charging pile group can be integrally accessed to a transformer in a zone area or a virtual power plant circuit, and electric energy balance and operation safety of the whole zone area are guaranteed.

Description

Technical Field

[0001] This utility model relates to a parallel communication control device for a group of charging piles. Background Technology

[0002] With the rapid popularization of new energy vehicles, public charging stations and residential charging stations are being deployed on a large scale. The parallel operation of these charging stations is characterized by randomness and high power, bringing unpredictable load impacts to the transformer substations. Therefore, flexible parallel load control of the charging stations is needed for orderly regulation. However, existing charging station group control systems are still immature in terms of hardware, specifically as follows:

[0003] (1) The existing mainstream charging pile group control structure is difficult to meet the needs of rapid information communication.

[0004] Existing charging piles generally use a communication structure of "user - charging pile operation platform - charging pile TCU controlling a single charging pile - charging gun action command". The charging pile operation platform is usually located in the cloud, ensuring simultaneous communication with the charging pile and the user via 4G / 5G networks, while the charging pile TCU only controls a single charging pile. This results in a lack of effective information exchange between charging pile groups, and their action control is relatively independent. Furthermore, the stability of 4G / 5G network communication is insufficient and cannot meet the millisecond-level information processing and action execution requirements of power electronic devices.

[0005] (2) Poor protocol compatibility leads to difficulties in interconnection;

[0006] The charging pile market suffers from severe protocol fragmentation: State Grid charging piles generally adopt GB / T 27930 and IEC104 protocols, while third-party operators mostly use proprietary protocols (such as the cloud fast charging interaction protocol). Existing charging pile TCUs typically only support the single protocol of the charging pile they control, making interoperability between charging piles from different brands difficult and further causing communication delays. Utility Model Content

[0007] This utility model overcomes the shortcomings of the existing technology, and the technical problem to be solved is: to provide a communication control device that is deployed on-site in a charging pile group, includes communication interfaces and protocols adapted to different types of charging piles, and supports multiple data channels.

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0009] A parallel communication control device for a charging pile group includes a mobile internet communication circuit, a WLAN communication circuit, an I2C integrated interconnection circuit, a CPU, running memory, a charging pile group collaborative control algorithm storage circuit, a first protocol conversion circuit, a second protocol conversion circuit, a first LAN RJ45 port, a second LAN RJ45 port, a first RS serial port, and a second RS serial port. The mobile internet communication circuit and the WLAN communication module are both connected to the I2C integrated interconnection circuit. The running memory is also connected to the I2C integrated interconnection circuit. The CPU and the charging pile group collaborative control algorithm storage circuit are both connected to the running memory. The first and second protocol conversion circuits are both connected to the running memory. The first and second LAN RJ45 ports are both connected to the first protocol conversion circuit. The first and second RS serial ports are both connected to the second protocol conversion circuit.

[0010] Preferably, the present invention further includes a first switch and a second switch. The first LAN RJ45 port is connected to the first switch, and the first switch is used to connect a plurality of charging piles. The second LAN RJ45 port is used to connect a single charging pile. The first RS serial port is used to connect a single charging pile. The second RS serial port is connected to the second switch, and the second switch is used to connect a plurality of charging piles.

[0011] Preferably, the mobile internet communication circuit is used to communicate with the charging pile operation platform, and the WLAN communication circuit is used to communicate with the transformer in the distribution area and the virtual power plant circuit.

[0012] Preferably, both the first LAN RJ45 port and the second LAN RJ45 port support transmission rates of 10Mbps, 100Mbps, or 1000Mbps.

[0013] Preferably, both the first RS serial port and the second RS serial port support the 232, 422, or 485 interface standards.

[0014] As preferred options, mobile internet communication circuits and WLAN communication circuits are used for wireless communication.

[0015] Preferably, the first protocol conversion circuit includes chip U1, resistors R1, R2, R3, R4, R5, R6, R7, and capacitor C1. The first LAN RJ45 port is chip U2. The positive transmit terminal TX+_S of chip U1 is connected to the positive transmit terminal TX_D1+ of chip U2, and the negative transmit terminal TX-_S of chip U1 is connected to the negative transmit terminal TX_D1- of chip U2. The positive receive terminal RX+_S of chip U1 is connected to the positive receive terminal RX_D2+ of chip U2, and the negative receive terminal RX-_S of chip U1 is connected to the negative receive terminal TX_D2+ of chip U2. The common-mode transformer terminal CMT of chip U1 is connected to one end of resistor R7 through resistor R1. The other end of resistor R7 is connected to the bidirectional positive data terminal BI_D4+ of chip U2 through resistor R5. The other end of resistor R7 is also connected to the bidirectional negative data terminal BI_D4- of chip U2 through resistor R6. The bidirectional positive data terminal BI_D3+ of chip U2 is connected to one end of resistor R4 through resistor R2. The bidirectional negative data terminal BI_D3- of chip U2 is connected to one end of resistor R4 through resistor R3. The other end of resistor R4 is connected to ground GND through capacitor C1. The ground terminal P of chip U2 is connected to ground GND.

[0016] Preferably, the second protocol conversion circuit is chip U3, and the first RS serial port and the second RS serial port are both chip U4. The transmitting signal terminal T2OUT of chip U3 is connected to the receiving data terminal RXD of chip U4, the second receiving terminal R2IN of chip U3 is connected to the transmitting terminal TXD of chip U4, the first receiving terminal R1IN of chip U3 is connected to ground GND, the first data terminal preparation terminal DTR of chip U4 is connected to the second data preparation terminal DSR of chip U4, and the first data terminal preparation terminal DTR of chip U4 is also connected to the clear transmitting terminal CTS of chip U4.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. This utility model realizes the aggregation of charging pile information, improves the speed of collaborative management between piles, and summarizes the information between different piles to realize the statistics and coordination of the overall power of the pile group, and realizes the overall status monitoring and flexible scheduling of the charging pile group.

[0019] 2. The interface is compatible with multiple charging pile protocols. Different communication protocols for different charging pile brands and characteristics can be pre-set in the protocol conversion module of this utility model to improve communication efficiency.

[0020] 3. The internal coordination of the charging pile group is completed using a single hardware device, which reduces hardware investment and software upgrade costs compared to the traditional method of upgrading the TCU of each charging pile separately.

[0021] 4. This utility model allows the charging pile group to be connected as a whole to the transformer or virtual power plant circuit of the distribution area, thus ensuring the power balance and operational safety of the entire distribution area. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the circuit structure connecting the Ethernet LAN RJ45 interface and the protocol conversion module in this utility model;

[0024] Figure 3 This is a schematic diagram of the circuit structure connecting the RS serial port interface and the protocol conversion module in this utility model;

[0025] Figure 4 A schematic diagram showing the structure of this utility model connected to a charging pile group;

[0026] Figure 5 This is a schematic diagram showing the connection between the device of this utility model and the charging pile operation platform, the transformer in the distribution area, and the virtual power plant circuit. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0028] like Figure 1 As shown, a parallel communication control device for a charging pile group includes a mobile internet communication circuit 1, a WLAN communication circuit 2, an I2C integrated interconnection circuit 3, a CPU 4, a running memory 7, a charging pile group collaborative control algorithm storage circuit 5, a first protocol conversion circuit 6, a second protocol conversion circuit 8, a first LAN RJ45 port 9, a second LAN RJ45 port 10, a first RS serial port 11, and a second RS serial port 12. The mobile internet communication circuit 1 and the WLAN communication module are both connected to the I2C integrated interconnection circuit 3. The running memory 7 is connected to the I2C integrated interconnection circuit 3. The CPU 4 and the charging pile group collaborative control algorithm storage circuit 5 are both connected to the running memory 7. The first protocol conversion circuit 6 and the second protocol conversion circuit 8 are both connected to the running memory 7. The first LAN RJ45 port 9 and the second LAN RJ45 port 10 are both connected to the first protocol conversion circuit 6. The first RS serial port 11 and the second RS serial port 12 are both connected to the second protocol conversion circuit 8.

[0029] like Figure 4As shown, this utility model also includes a first switch 13 and a second switch 14. The first LAN RJ45 port 9 is connected to the first switch 13, and the first switch 13 is used to connect a number of charging piles. The second LAN RJ45 port 10 is used to connect a single charging pile or charging stack. The first RS serial port 11 is used to connect a single charging pile or charging stack. The second RS serial port 12 is connected to the second switch 14, and the second switch 14 is used to connect a number of charging piles. Figure 4 The invention demonstrates a communication connection method between the device and a charging pile group. Based on the specific open communication interfaces and the number of charging piles in the site, the connection interface type, as well as the specific type and number of switches, are selected. The switches can expand one LAN port or RS port into multiple ports to achieve parallel communication.

[0030] like Figure 5 As shown, the mobile internet communication circuit 1 is used to communicate with the charging pile operation platform 16, and the WLAN communication circuit 2 is used to communicate with the transformer substation 17 and the virtual power plant circuit 18. Based on the mobile internet communication module within the device, the overall operating status of the charging pile group is aggregated to the charging pile operation platform, and the device can receive scheduling instructions for each pile. In addition, based on the WLAN communication circuit within the device, communication with the transformer substation and the virtual power plant circuit can be selectively established, introducing additional grid information to make power dispatch and maintenance more balanced. The information from the charging pile operation platform and the transformer substation can be connected in parallel to this device and participate in dispatch simultaneously.

[0031] The first LAN RJ45 port 9 and the second LAN RJ45 port 10 both support transmission rates of 10Mbps, 100Mbps, or 1000Mbps. The first RS serial port 11 and the second RS serial port 12 both support the 232, 422, or 485 interface standards. The mobile internet communication circuit 1 and the WLAN communication circuit 2 are both used for wireless communication.

[0032] like Figure 2As shown, the first protocol conversion circuit 6 includes chip U1, resistors R1, R2, R3, R4, R5, R6, R7, and capacitor C1. The first LAN RJ45 port 9 is chip U2. The positive transmit terminal TX+_S of chip U1 is connected to the positive transmit terminal TX_D1+ of chip U2, and the negative transmit terminal TX-_S of chip U1 is connected to the negative transmit terminal TX_D1- of chip U2. The positive receive terminal RX+_S of chip U1 is connected to the positive receive terminal RX_D2+ of chip U2, and the negative receive terminal RX-_S of chip U1 is connected to the negative receive terminal TX_D2+ of chip U2. The common mode transformer terminal CMT of chip U1 is connected to one end of resistor R7 through resistor R1. The other end of resistor R7 is connected to the bidirectional positive data terminal BI_D4+ of chip U2 via resistor R5. The other end of resistor R7 is also connected to the bidirectional negative data terminal BI_D4- of chip U2 via resistor R6. The bidirectional positive data terminal BI_D3+ of chip U2 is connected to one end of resistor R4 via resistor R2. The bidirectional negative data terminal BI_D3- of chip U2 is connected to one end of resistor R4 via resistor R3. The other end of resistor R4 is connected to ground (GND) via capacitor C1. The ground terminal P of chip U2 is also connected to ground (GND). The first LAN RJ45 port 9 is grounded through resistors and capacitors to suppress high-frequency common-mode interference, enhance the anti-interference capability of signal transmission, and ensure the stability and reliability of Ethernet communication. The protocol conversion module sends control information to the charging pile.

[0033] like Figure 3 As shown, the second protocol conversion circuit 8 is chip U3, and the first RS serial port 11 and the second RS serial port 12 are both chip U4. The transmitting signal terminal T2OUT of chip U3 is connected to the receiving data terminal RXD of chip U4, the second receiving terminal R2IN of chip U3 is connected to the transmitting terminal TXD of chip U4, the first receiving terminal R1IN of chip U3 is connected to ground GND, the first data terminal preparation terminal DTR of chip U4 is connected to the second data preparation terminal DSR of chip U4, and the first data terminal preparation terminal DTR of chip U4 is also connected to the clear transmitting terminal CTS of chip U4. The connection mode of the first RS serial port 11 forces the establishment of a communication link, establishes a common reference potential, and reduces interference. The transmitting signal terminal T2OUT of chip U3 sends a signal to the second RS serial port 12, and the second receiving terminal R2IN of chip U3 receives the signal from the second RS serial port 12, completing the communication loop.

[0034] A communication control device capable of parallel communication with multiple charging piles while retaining the ability to interface with the charging pile operation platform. It includes: two LAN RJ45 Ethernet interfaces, adaptable to different transmission rates such as 10 / 100 / 1000Mbps; two RS serial ports, selectable according to the charging pile hardware structure using three different interface standards: 232 / 422 / 485; two protocol conversion modules corresponding to the two types of interfaces; one mobile internet communication module; one WLAN communication circuit for communication via on-site wireless networks such as WiFi; one I2C integrated mutual inductance circuit for wireless access control device information transmission; one RAM for storing processing and computation information; one module for storing the charging pile group collaborative control algorithm; and one dual-core CPU with a main frequency of 1GHz or higher.

[0035] This utility model enables a single device to communicate with multiple charging piles in a charging pile group simultaneously; it can also connect to the charging pile operation platform, thus realizing the overall "charging pile operation platform - charging pile group parallel communication control device - information interaction between each charging pile in the charging pile group".

[0036] This invention utilizes Ethernet or serial communication to connect charging pile groups, depending on the specific wired communication structure of the charging piles. The Ethernet LAN port can be configured with a switch, enabling multiple charging piles to connect to the switch, and the switch to the LAN port. When the number of charging piles is small or the charging pile power is high (≥240kW), requiring faster communication speeds, a LAN RJ45 Ethernet interface can be used for direct connection to the charging piles. If the charging pile has an open RS serial port interface, the RS serial port interface of this invention can also be used to connect the charging pile group, with a communication structure similar to the LAN RJ45 port type.

[0037] The two protocol conversion modules in this utility model convert charging pile group information with different access methods into a unified data format, specifically covering: charging pile number, charging pile rated power, charging pile rated voltage, charging pile rated current, charging pile connection to BMS determination signal, BMS required power, BMS required voltage, BMS required current and other signals; the relevant information is updated in memory according to the specifications and refreshed once every 1 second.

[0038] The mobile internet communication circuit of this utility model enables communication with the charging pile operation platform; the WLAN communication circuit, based on the wireless local area network, can optionally connect to the transformer or virtual power plant circuit of the charging area. This connection is not necessary, but it can increase the identification of the overall available charging active power of the charging pile group; the I2C integrated interconnection circuit realizes the conversion of relevant communication information into corresponding signals in memory, which is refreshed once every 1 second.

[0039] It should be noted that the above examples are only one specific embodiment of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. In short, all variations that can be directly derived or conceived by those skilled in the art from the content disclosed in this utility model should be considered within the protection scope of this utility model.

Claims

1. A parallel communication control device for a group of charging piles, characterized in that, The system includes a mobile internet communication circuit (1), a WLAN communication circuit (2), an I2C integrated interconnection circuit (3), a CPU (4), a running memory (7), a pile group collaborative control algorithm storage circuit (5), a first protocol conversion circuit (6), a second protocol conversion circuit (8), a first LAN RJ45 port (9), a second LAN RJ45 port (10), a first RS serial port (11), and a second RS serial port (12). The mobile internet communication circuit (1) and the WLAN communication module are both connected to the I2C integrated interconnection circuit (3). The running memory (7) is connected to the I2C integrated interconnection circuit (3). The CPU (4) and the pile group collaborative control algorithm storage circuit (5) are both connected to the running memory (7). The first protocol conversion circuit (6) and the second protocol conversion circuit (8) are both connected to the running memory (7). The first LAN RJ45 port (9) and the second LAN RJ45 port (10) are both connected to the first protocol conversion circuit (6). The first RS serial port (11) and the second RS serial port (12) are both connected to the second protocol conversion circuit (8).

2. The parallel communication control device for a charging pile group according to claim 1, characterized in that, It also includes a first switch (13) and a second switch (14). The first LAN RJ45 port (9) is connected to the first switch (13). The first switch (13) is used to connect several charging piles. The second LAN RJ45 port (10) is used to connect a single charging pile or charging stack. The first RS serial port (11) is used to connect a single charging pile or charging stack. The second RS serial port (12) is connected to the second switch (14). The second switch (14) is used to connect several charging piles.

3. The parallel communication control device for a charging pile group according to claim 1, characterized in that, The mobile internet communication circuit (1) is used to communicate with the charging pile operation platform (16), and the WLAN communication circuit (2) is used to communicate with the transformer substation (17) and the virtual power plant circuit (18).

4. The parallel communication control device for a charging pile group according to claim 1, characterized in that, Both the first LAN RJ45 port (9) and the second LAN RJ45 port (10) support transmission rates of 10Mbps, 100Mbps, or 1000Mbps.

5. The parallel communication control device for a charging pile group according to claim 1, characterized in that, Both the first RS serial port (11) and the second RS serial port (12) support the 232, 422 or 485 interface standards.

6. The parallel communication control device for a charging pile group according to claim 1, characterized in that, The mobile internet communication circuit (1) and WLAN communication circuit (2) are both used for wireless communication.

7. The parallel communication control device for a charging pile group according to claim 1, characterized in that, The first protocol conversion circuit (6) includes chip U1, resistors R1, R2, R3, R4, R5, R6, R7, and capacitor C1. The first LAN RJ45 port (9) is chip U2. The positive transmitting terminal TX+_S of chip U1 is connected to the positive transmitting terminal TX_D1+ of chip U2, the negative transmitting terminal TX-_S of chip U1 is connected to the negative transmitting terminal TX_D1- of chip U2, the positive receiving terminal RX+_S of chip U1 is connected to the positive receiving terminal RX_D2+ of chip U2, and the negative receiving terminal RX-_S of chip U1 is connected to the negative receiving terminal TX_D2+ of chip U2. The common mode transformer terminal CMT of chip U1 is connected to one end of resistor R7 through resistor R1. The other end of resistor R7 is connected to the bidirectional positive data terminal BI_D4+ of chip U2 via resistor R5. The other end of resistor R7 is also connected to the bidirectional negative data terminal BI_D4- of chip U2 via resistor R6. The bidirectional positive data terminal BI_D3+ of chip U2 is connected to one end of resistor R4 via resistor R2. The bidirectional negative data terminal BI_D3- of chip U2 is connected to one end of resistor R4 via resistor R3. The other end of resistor R4 is connected to ground GND via capacitor C1. The ground terminal P of chip U2 is connected to ground GND.

8. The parallel communication control device for a charging pile group according to claim 2, characterized in that, The second protocol conversion circuit (8) is chip U3, the first RS serial port (11) and the second RS serial port (12) are both chip U4. The transmitting signal terminal T2OUT of chip U3 is connected to the receiving data terminal RXD of chip U4. The second receiving terminal R2IN of chip U3 is connected to the transmitting terminal TXD of chip U4. The first receiving terminal R1IN of chip U3 is connected to ground GND. The first data terminal preparation terminal DTR of chip U4 is connected to the second data preparation terminal DSR of chip U4. The first data terminal preparation terminal DTR of chip U4 is also connected to the clear transmitting terminal CTS of chip U4.

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