A direct current charging pile

Abstract

A direct current charging pile belongs to the field of charging piles and is a charging pile for remote areas. Data transmission cannot be completed because the charging pile is not covered by a mobile phone signal, and the cost of laying wired or wireless networks as needed is too high. The first type of direct current charging pile is used to transmit data of itself and other charging piles to the district metering center through a network cable. The second type of direct current charging pile is used to transmit data of itself and other charging piles to the district metering center through a 4G module. The third type of direct current charging pile is used to transmit charging data of itself and other charging piles to the first type of direct current charging pile and the second type of direct current charging pile through a LoRa module, and then the first type of direct current charging pile and the second type of direct current charging pile transmit the charging data to the district metering center. Through the self-organizing network mode, the follow-up operation cost of the direct current charging pile is reduced, and the problem of whether the mobile phone signal is stable no longer needs to be considered, so that the use of the direct current charging pile is not limited by the mobile phone network.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of charging piles, in particular to a direct current charging pile. BACKGROUND

[0002] With the wide use of electric vehicles, the early charging piles for electric vehicles are all alternating current charging piles with slow charging speed, and the charging piles under construction are all direct current charging piles with fast charging speed.

[0003] At present, the communication module of the charging pile is wired transmission or uses 4G mobile phone network to transmit the working state and power consumption information of the charging pile.

[0004] The existing technology has the following disadvantages:

[0005] In recent years, the country has vigorously advocated rural electrification, which must first improve rural power consumption, including the early layout of direct current charging piles for electric vehicles. China has 40,000 towns, 580,000 administrative villages, and 2.6 million natural villages.

[0006] Disadvantage 1: Whether the direct current charging pile is laid out in a rural area with a wide range and few people or in a mountainous area with many mountains, there is a problem of great difficulty in construction of wired communication network and very high construction investment cost; if the direct current charging pile uses mobile phone network to complete wireless communication, whether the mobile phone signal can cover these areas, whether the mobile phone signal is stable in the area, and whether it can support reliable wireless data transmission are still to be investigated;

[0007] Disadvantage 2: If a direct current charging pile is built in a sparsely populated and mountainous area, if mobile phone network is used for data transmission, even if the mobile phone signal can cover the area where the direct current charging pile is located, since the use of mobile phone 4G network must purchase data wireless communication traffic card, the operation cost of the direct current charging pile using this solution will be very high. SUMMARY

[0008] In order to overcome the defects of the existing technology, the present application provides a direct current charging pile, which can solve the problem of data transmission failure due to lack of mobile phone signal coverage in remote areas, and the high cost of laying wired or wireless network on demand.

[0009] The technical solution adopted by the present application is:

[0010] A direct current charging pile, comprising: a first type of direct current charging pile, a second type of direct current charging pile and a third type of direct current charging pile;

[0011] The first type of direct current charging pile is used to transmit data of itself and other charging piles to the transformer area metering center through a network cable;

[0012] The second type of DC charging pile is used to transmit its own data and data from other charging piles to the district metering center via a 4G module;

[0013] The third type of DC charging pile is used to transmit its own and other charging piles' charging data to the first type of DC charging pile and the second type of DC charging pile via the third type of LoRa module, and then the first type of DC charging pile and the second type of DC charging pile transmit the data to the metering center of the distribution area.

[0014] Furthermore, the first type of DC charging pile includes a first type of LoRa module and a first type of charging pile controller. The first type of LoRa module includes a first type of LoRa function chip and a first type of LoRa module controller.

[0015] The first type of LoRa functional chip is connected to the SPI interface of the first type of LoRa module controller, the first type of LoRa module controller is connected to the SPI interface of the first type of charging pile controller, the network port of the first type of charging pile controller is connected to the metering center of the distribution area, and the first type of LoRa module is connected to other LoRa modules through the LPWAN protocol.

[0016] The first type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data;

[0017] The first type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol;

[0018] The first type of LoRa module controller is used to decide under what circumstances to receive charging data from other charging piles and under what circumstances to send charging data including its own.

[0019] The first type of charging pile controller is used to transmit charging pile data with the first type of LoRa module.

[0020] Furthermore, the second type of DC charging pile includes a second type of LoRa module, a second type of charging pile controller, and a 4G module. The second type of LoRa module includes a second type of LoRa function chip and a second type of LoRa module controller.

[0021] The second type of LoRa function chip is connected to the SPI interface of the second type of LoRa module controller, the second type of LoRa module controller is connected to the SPI interface of the second type of charging pile controller, the UART interface of the second type of charging pile controller is connected to the 4G module, and the 4G module is connected to the metering center of the distribution area. The second type of LoRa module is connected to other LoRa modules through the LPWAN protocol.

[0022] The second type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data;

[0023] The second type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol;

[0024] The second type of LoRa module controller is used to decide when to receive charging data from other charging piles and when to send charging data including its own.

[0025] The second type of charging pile controller is used to transmit charging pile data with the second type of LoRa module;

[0026] The 4G module is used to transmit data to the metering center of the distribution area.

[0027] Furthermore, the third type of DC charging pile includes a third type of LoRa module and a third type of charging pile controller. The third type of LoRa module includes a third type of LoRa functional chip and a third type of LoRa module controller.

[0028] The third type of LoRa functional chip is connected to the SPI interface of the third type of LoRa module controller, the third type of LoRa module controller is connected to the SPI interface of the third type of charging pile controller, and the third type of LoRa module is connected to other LoRa modules through the LPWAN protocol.

[0029] The third type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data;

[0030] The third type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol.

[0031] The third type of LoRa module controller is used to decide under what circumstances to receive charging data from other charging piles and under what circumstances to send charging data including its own.

[0032] The third type of charging pile controller is used to transmit charging pile data with the third type of LoRa module.

[0033] A method for implementing a DC charging pile, wherein the implementation steps of the LoRa module controller for the first type of DC charging pile and the second type of DC charging pile are as follows:

[0034] Step S1: When receiving data wirelessly, the HTTP protocol is used first to receive data. When data encryption is required, the HTTPS application layer protocol is used to receive data.

[0035] Step S2: Extract the charging pile number provided by the charging pile controller from the data to determine the source of the received data;

[0036] Step S3: According to the data requirements of the district metering center, send the DC charging pile data in areas not covered by the mobile network to the district metering center.

[0037] The beneficial effects of this invention are:

[0038] 1. It is suitable for use in rural areas with vast lands but poor infrastructure, which reduces the difficulty of construction.

[0039] 2. The self-organizing network reduces the subsequent operating costs of DC charging piles and eliminates the need to consider the stability of mobile phone signals, making the use of DC charging piles unrestricted by mobile phone networks. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the operation of a DC charging pile;

[0041] Figure 2 This is a structural block diagram of a first-class DC charging pile;

[0042] Figure 3 This is a structural block diagram of a second type of DC charging pile;

[0043] Figure 4 This is a structural block diagram of a third type of DC charging pile; Detailed Implementation

[0044] A type of DC charging pile includes a first type of DC charging pile, a second type of DC charging pile, and a third type of DC charging pile.

[0045] like Figure 2 As shown, the first type of DC charging pile includes a first type of LoRa module and a first type of charging pile controller. The first type of LoRa module includes a first type of LoRa function chip and a first type of LoRa module controller. The first type of DC charging pile is used to transmit its own data and data from other charging piles to the district metering center via a network cable.

[0046] The aforementioned district metering center refers to the server management center of the regional power supply company, which operates relevant management systems and records and processes information.

[0047] The first type of LoRa functional chip is connected to the SPI interface of the first type of LoRa module controller, the first type of LoRa module controller is connected to the SPI interface of the first type of charging pile controller, the network port of the first type of charging pile controller is connected to the metering center of the distribution area, and the first type of LoRa module is connected to other LoRa modules through the LPWAN protocol.

[0048] The first type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data;

[0049] The first type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol;

[0050] The first type of LoRa module controller is used to decide under what circumstances to receive charging data from other charging piles and under what circumstances to send charging data including its own.

[0051] The first type of charging pile controller is used to transmit charging pile data with the first type of LoRa module.

[0052] like Figure 3 As shown, the second type of DC charging pile includes a second type of LoRa module, a second type of charging pile controller, and a 4G module. The second type of LoRa module includes a second type of LoRa function chip and a second type of LoRa module controller. The second type of DC charging pile is used to transmit its own data and data from other charging piles to the local metering center via the 4G module.

[0053] The second type of LoRa function chip is connected to the SPI interface of the second type of LoRa module controller, the second type of LoRa module controller is connected to the SPI interface of the second type of charging pile controller, the UART interface of the second type of charging pile controller is connected to the 4G module, and the 4G module is connected to the metering center of the distribution area. The second type of LoRa module is connected to other LoRa modules through the LPWAN protocol.

[0054] The second type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data;

[0055] The second type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol;

[0056] The second type of LoRa module controller is used to decide when to receive charging data from other charging piles and when to send charging data including its own.

[0057] The second type of charging pile controller is used to transmit charging pile data with the second type of LoRa module;

[0058] The 4G module is used to transmit data to the metering center of the distribution area.

[0059] like Figure 4As shown, the third type of DC charging pile includes a third type of LoRa module and a third type of charging pile controller. The third type of LoRa module includes a third type of LoRa function chip and a third type of LoRa module controller. The third type of DC charging pile is used to transmit its own charging data and that of other charging piles to the first type of DC charging pile and the second type of DC charging pile via the third type of LoRa module, and then the first type of DC charging pile and the second type of DC charging pile transmit the data to the metering center of the distribution area.

[0060] The third type of LoRa functional chip is connected to the SPI interface of the third type of LoRa module controller, the third type of LoRa module controller is connected to the SPI interface of the third type of charging pile controller, and the third type of LoRa module is connected to other LoRa modules through the LPWAN protocol.

[0061] The third type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data;

[0062] The third type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol.

[0063] The third type of LoRa module controller is used to decide under what circumstances to receive charging data from other charging piles and under what circumstances to send charging data including its own.

[0064] The third type of charging pile controller is used to transmit charging pile data with the third type of LoRa module.

[0065] A method for implementing a DC charging pile, wherein the implementation steps of the LoRa module controller for the first type of DC charging pile and the second type of DC charging pile are as follows:

[0066] Step S1: When receiving data wirelessly, the HTTP protocol is used first to receive data. When data encryption is required, the HTTPS application layer protocol is used to receive data.

[0067] Step S2: Extract the charging pile number provided by the charging pile controller from the data to determine the source of the received data;

[0068] Step S3: According to the data requirements of the district metering center, send the DC charging pile data in areas not covered by the mobile network to the district metering center.

[0069] like Figure 1As shown, the billing data of charging piles ultimately needs to be uploaded to the State Grid's regional metering center. Therefore, it is still necessary to upload the charging pile data within the self-organizing network area to the regional metering center closest to the self-organizing network area. In order to achieve cost-free data exchange within the self-organizing network area and to ultimately transmit the DC charging pile data within the self-organizing network area to the State Grid metering center, this invention divides DC charging piles into three categories:

[0070] The first type of DC charging pile, located in densely populated rural areas, uses wired transmission for data transmission. These piles are placed in areas with a wired network connecting them to the metering center, regardless of distance; where a wired network exists, a wireless network is unnecessary, ensuring reliable data transmission. Besides charging and billing electric vehicles, they also act as a concentrator, aggregating data from all DC charging piles within the self-organizing network area and transmitting the aggregated data to the metering center via the wired network.

[0071] The second type of DC charging pile is located in areas without wired networks but at the edge of mobile phone signal coverage, where the signal strength can ensure stable wireless data transmission. It adopts a data communication method that combines 4G mobile phone networks and wired transmission (prioritizing wireless network communication with the district metering center). The second type of DC charging pile is placed at the edge of the self-organizing network area covered by the mobile phone network. Its function is not only to charge electric vehicles and bill them, but also to act as a concentrator to collect data from all DC charging piles in the self-organizing network area and send the collected data to the district metering center via the mobile phone wireless network.

[0072] The third type of DC charging pile is located in sparsely populated, mountainous areas without wired networks, where mobile phone signals are either nonexistent or unstable. It utilizes LPWAN technology for data transmission, specifically LoRa communication technology. These third-type DC charging piles are placed in areas without mobile network coverage, leveraging LPWAN technology to create a self-organizing network. Besides charging and billing, each charging pile's LPWAN module transmits data from all charging piles in the area to first or second-type charging piles via a wireless self-organizing network. Finally, the first or second-type charging piles transmit the metering data to the regional metering center. The third-type charging piles act as data relays to each other.

[0073] The first type of DC charging pile directly interacts with the monitoring center via a wired network.

[0074] The second type of DC charging pile acts as a data concentrator. The second type of LoRa module on the DC charging pile is responsible for receiving data uploaded to the local area network by the third type of DC charging pile. The 4G module on the second type of DC charging pile is responsible for transmitting the data that the DC charging pile needs to transmit, and at the same time, it is responsible for transmitting the data received from each third type of charging pile in the local area network to the monitoring center.

[0075] When the LoRa module controllers of both Class I and Class II DC charging piles receive data wirelessly, they first use the HTTP protocol to receive the data, then extract the charging pile number from the data (provided by the charging pile controller), determine the source of the received data, and finally send the DC charging pile data in areas not covered by the mobile network to the district metering center according to the data requirements of the district metering center.

[0076] If data encryption is required, the HTTPS application layer protocol can be used. It employs shared key encryption and public key encryption methods, which provide better confidentiality. However, it consumes more data transmission bandwidth, which will reduce the data transmission speed and amount.

[0077] The third type of DC charging pile requires a wireless signal repeater to form a low-cost local area network (LAN). This repeater strengthens the LPWAN wireless transmission signal and extends the wireless transmission distance of the third-type LoRa module. The repeater only contains the LoRa module. The LoRa module can be integrated into the DC charging pile or not. The LoRa wireless communication module, a representative long-range, low-power LPWAN wireless transmission module, is responsible for uploading data to the self-organizing LAN. One mode involves the third-type DC charging pile transmitting the signal to the first-type DC charging pile, which then transmits it to the monitoring center. Another mode involves the third-type DC charging pile transmitting the signal to the second-type DC charging pile, which then transmits it to the monitoring center.

[0078] The third type of DC charging pile enables data transmission of the charging pile by using its own LoRa module network in the absence of 4G and network cable.

[0079] The LoRa module controller for the third type of DC charging pile adds the charging pile number to the transmitted data while using the LoRa module, and embeds the HTTP application protocol on top of the transmitted data. This protocol can ensure that the receiving end receives the data in the correct order.

[0080] The power supply method for wireless signal repeaters depends on the environment; it can be AC, DC, or battery powered. The power module switches between different power supply methods and the module's power requirements.

[0081] Its hardware integration methods include:

[0082] Several third-class DC charging piles are connected to several repeaters in any combination, and then the signal is transmitted to the first-class DC charging piles or the second-class DC charging piles. The first-class DC charging piles or the second-class DC charging piles then transmit the signal to the district metering center server.

[0083] The LoRa module used is the Ra-01 model from Aixinke.

Claims

1. A DC charging pile, characterized in that, include: Class I DC charging piles, Class II DC charging piles and Class III DC charging piles; The first type of DC charging pile is used to transmit its own data and data from other charging piles to the district metering center via network cable. The second type of DC charging pile is used to transmit its own data and data from other charging piles to the district metering center via a 4G module; The third type of DC charging pile is used to transmit its own and other charging piles' charging data to the first type of DC charging pile and the second type of DC charging pile through the third type of LoRa module, and then the first type of DC charging pile and the second type of DC charging pile transmit the data to the metering center of the distribution area. The first type of DC charging pile includes a first type of LoRa module and a first type of charging pile controller. The first type of LoRa module includes a first type of LoRa function chip and a first type of LoRa module controller. The first type of LoRa functional chip is connected to the SPI interface of the first type of LoRa module controller, the first type of LoRa module controller is connected to the SPI interface of the first type of charging pile controller, the network port of the first type of charging pile controller is connected to the metering center of the distribution area, and the first type of LoRa module is connected to other LoRa modules through the LPWAN protocol. The first type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data; The first type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol; The first type of LoRa module controller is used to decide under what circumstances to receive charging data from other charging piles and under what circumstances to send charging data including its own. The first type of charging pile controller is used to transmit charging pile data with the first type of LoRa module; The second type of DC charging pile includes a second type of LoRa module, a second type of charging pile controller and a 4G module. The second type of LoRa module includes a second type of LoRa function chip and a second type of LoRa module controller. The second type of LoRa function chip is connected to the SPI interface of the second type of LoRa module controller, the second type of LoRa module controller is connected to the SPI interface of the second type of charging pile controller, the UART interface of the second type of charging pile controller is connected to the 4G module, and the 4G module is connected to the metering center of the distribution area. The second type of LoRa module is connected to other LoRa modules through the LPWAN protocol. The second type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data; The second type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol; The second type of LoRa module controller is used to decide when to receive charging data from other charging piles and when to send charging data including its own. The second type of charging pile controller is used to transmit charging pile data with the second type of LoRa module; The 4G module is used to transmit data to the metering center of the distribution area; The third type of DC charging pile includes a third type of LoRa module and a third type of charging pile controller. The third type of LoRa module includes a third type of LoRa function chip and a third type of LoRa module controller. The third type of LoRa functional chip is connected to the SPI interface of the third type of LoRa module controller, the third type of LoRa module controller is connected to the SPI interface of the third type of charging pile controller, and the third type of LoRa module is connected to other LoRa modules through the LPWAN protocol. The third type of LoRa module is used to complete wireless networking and cooperate with other charging piles to transmit and receive charging data; The third type of LoRa functional chip is used to control the system to perform wireless transmission of the LoRa protocol. The third type of LoRa module controller is used to decide under what circumstances to receive charging data from other charging piles and under what circumstances to send charging data including its own. The third type of charging pile controller is used to transmit charging pile data with the third type of LoRa module.

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