阅读说明：本技术 一种电动汽车充电桩bms数据监控装置 (Electric automobile fills electric pile BMS data monitoring device ) 是由 林斯和 赖春权 于 2019-12-17 设计创作，主要内容包括：本发明公开了一种电动汽车充电桩BMS数据监控装置,涉及电动汽车充电桩,包括控制器、CAN接口模块、存储模块、无线通信模块和电源模块,所述CAN接口模块和电动汽车BMS和充电站的之间的CAN总线连接；所述控制器通过CAN接口模块监听车载BMS和充电桩之间的CAN传输的标准报文,实时获取电池的充电状态参数进行本地存储以进行解析,判断电池充电时是否过温、过压,并将充电参数和包括故障信息在内的状态信息,通过无线通信模块推送到云管理平台,由云管理平台进行远程管理和运维；所述无线通信模块为WIFI模块。本发明通过CAN总线接口直接接入监听车载BMS和充电桩之间的CAN传输的标准报文,以获取电动汽车充电时的异常信息。(The invention discloses a BMS data monitoring device for an electric vehicle charging pile, which relates to the electric vehicle charging pile and comprises a controller, a CAN interface module, a storage module, a wireless communication module and a power module, wherein the CAN interface module is connected with a CAN bus between the BMS and a charging station; the controller monitors standard messages transmitted by a CAN between the vehicle-mounted BMS and the charging pile through the CAN interface module, acquires charging state parameters of the battery in real time, locally stores the charging state parameters for analysis, judges whether the battery is over-temperature or over-voltage during charging, pushes the charging parameters and state information including fault information to a cloud management platform through the wireless communication module, and performs remote management and operation and maintenance through the cloud management platform; the wireless communication module is a WIFI module. The invention directly accesses and monitors the standard message transmitted by the CAN between the vehicle-mounted BMS and the charging pile through the CAN bus interface so as to acquire the abnormal information during the charging of the electric automobile.)

1. The utility model provides an electric automobile fills electric pile BMS data monitoring device which characterized in that: the CAN bus charging system comprises a controller, a CAN interface module, a storage module, a wireless communication module and a power supply module, wherein the CAN interface module is connected with a CAN bus between a vehicle-mounted BMS and a charging station; the controller monitors a standard message transmitted by a CAN between the vehicle-mounted BMS and the charging pile through the CAN interface module, acquires charging state parameters of the battery in real time, locally stores the charging state parameters for analysis, judges whether the battery is over-temperature or over-voltage during charging, pushes the charging parameters and state information including fault information to a cloud management platform through the wireless communication module, and performs remote detection and operation and maintenance through the cloud management platform;

the wireless communication module is a WIFI communication module.

2. The electric vehicle charging pile BMS data monitoring device of claim 1, wherein: and the acquisition and the pushing of the charging parameters and the state information comprise real-time data reading and historical data reading.

3. The electric vehicle charging pile BMS data monitoring device of claim 2, wherein: the real-time data reading comprises the following steps:

starting a real-time data transmission channel, starting an RTC clock timer, and waiting for a set minute to finish data acquisition;

judging whether the quantity of the collected data overflows or not, if not, packaging the data according to a protocol, and sending the data through a network;

and judging the sending zone bit after the sending is finished, jumping out of the interrupt if the data sending is finished, and packing the data again for sending if the data sending is not finished.

4. The electric vehicle charging pile BMS data monitoring device of claim 2, wherein: the historical data reading comprises the following steps:

judging whether the historical data needs to be read or not, and if the stored historical data needs to be read, continuously judging whether the historical data needs to be transmitted in real time or not; if the historical data needs to be transmitted in real time, reading the node coordinates of the needed historical data, and judging whether the historical time coordinates are correct or not; if no error exists, judging whether the quantity of the historical data overflows or not, if not, packaging the data according to a protocol, and sending the data through a network; and judging the sending zone bit after the sending is finished, jumping out of the interrupt if the data sending is finished, and packing the data again for sending if the data sending is not finished.

5. The electric vehicle charging pile BMS data monitoring device of claim 1, wherein: the storage module is used for external storage and is provided with an external storage interface for connecting an external storage card.

6. The electric vehicle charging pile BMS data monitoring device of claim 5, wherein: the external storage is an SD card.

7. The electric vehicle charging pile BMS data monitoring device of claim 5, wherein: the capacity of the external storage is not less than 16 GB.

8. The electric vehicle charging pile BMS data monitoring device of claim 1, wherein: the data monitoring device is arranged inside the charging pile.

9. The electric vehicle charging pile BMS data monitoring device of claim 1, wherein: the data monitoring device is arranged on a CAN interface adapter of the charging gun of the charging pile.

10. The electric vehicle charging pile BMS data monitoring device of claim 1, wherein: the battery backup system further comprises a backup battery, and the backup battery is connected to a battery power supply pin of the controller through a diode.

Technical Field

The invention relates to the field of electric automobile charging piles, in particular to a BMS data monitoring device for an electric automobile charging pile.

Background

At present electric automobile is extensive application, a large amount of all kinds of electric automobile charging piles have been induced, though each charging pile brand, the structure is different, but wherein fill the data information interchange between electric pile and the car and all be big same little different, however because of various reasons, it is all likely to appear charging the abnormal condition all to fill electric pile all kinds in the charging process, and these trouble problems all can follow the communication acquisition between electric pile and the car of filling, but if fill electric pile and car and charge the problem in the current device if appearing, can only arrive the scene by technical staff, fill electric pile through special instrument connection and look over the analysis fault reason, and because the fault probably the contingency phenomenon appears, even technical staff on-the-spot debugging equipment, also can not necessarily reappear the fault reason, thereby the solution problem.

In addition, the existing data acquisition devices only have an acquisition function and do not have a data analysis function, so that a special technician is required to perform corresponding data analysis to know the meaning of the data.

Disclosure of Invention

In view of the above defects in the prior art, an object of the present invention is to provide an electric vehicle charging pile BMS data monitoring apparatus, which can read and analyze a data state of a charging pile and upload the data state to a management platform through a network, so as to improve monitoring and operation and maintenance management capabilities of the management platform.

In order to achieve the purpose, the invention provides a BMS data monitoring device for an electric vehicle charging pile, which comprises a controller, a CAN interface module, a storage module, a wireless communication module and a power supply module, wherein the controller is used for controlling the CAN interface module;

the CAN interface module is connected with a CAN bus between the vehicle-mounted BMS and the charging station;

the controller monitors standard messages transmitted by a CAN between the vehicle-mounted BMS and the charging pile through the CAN interface module, acquires charging state parameters of the battery in real time, locally stores the charging state parameters for analysis, judges whether the battery is over-temperature or over-voltage during charging, pushes the charging parameters and state information including fault information to a cloud management platform through the wireless communication module, and performs remote management and operation and maintenance through the cloud management platform;

the wireless communication module is a WIFI module.

Further, the collection and the pushing of the charging parameters and the state information comprise real-time data reading and historical data reading.

Further, the real-time data reading comprises the following steps:

starting a real-time data transmission channel, starting an RTC clock timer, and waiting for a set minute to finish data acquisition;

judging whether the quantity of the collected data overflows or not, if not, packaging the data according to a protocol, and sending the data through a network;

and judging the sending zone bit after the sending is finished, jumping out of the interrupt if the data sending is finished, and packing the data again for sending if the data sending is not finished.

Further, the historical data reading comprises the following steps:

judging whether the historical data needs to be read or not, and if the stored historical data needs to be read, continuously judging whether the historical data needs to be transmitted in real time or not; if the historical data needs to be transmitted in real time, reading the node coordinates of the needed historical data, and judging whether the historical time coordinates are correct or not; if no error exists, judging whether the quantity of the historical data overflows or not, if not, packaging the data according to a protocol, and sending the data through a network; and judging the sending zone bit after the sending is finished, jumping out of the interrupt if the data sending is finished, and packing the data again for sending if the data sending is not finished.

Further, the storage module is an external storage.

Further, the external storage is an SD card.

Further, the capacity of the external storage is not less than 16 GB.

Further, the data monitoring device is arranged inside the charging pile.

Further, the data monitoring device is arranged on a CAN interface adapter of the charging gun of the charging pile.

The BMS data monitoring device for the charging pile of the electric automobile directly accesses and monitors the standard message transmitted by the CAN between the vehicle-mounted BMS and the charging pile through the CAN bus interface so as to acquire the abnormity of over-temperature and over-voltage during charging of the electric automobile, and provides an economic remote management scheme through WIFI networking.

Drawings

Fig. 1 is a system configuration diagram of a preferred embodiment of an electric vehicle charging pile BMS data monitoring apparatus of the present invention;

fig. 2 is a schematic circuit diagram of a WIFI module, an SD card interface module, and a CAN interface module according to an embodiment of the present invention;

FIG. 3 is a circuit schematic of a power module of an embodiment of the invention;

FIG. 4 is a schematic circuit diagram of a microcontroller and peripherals according to an embodiment of the present invention;

fig. 5 is a diagram of a WIFI networking architecture of the present invention;

fig. 6 is a listening flow of the present invention.

Detailed Description

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The invention will now be further described with reference to the accompanying drawings and detailed description.

The invention discloses a specific embodiment of an electric vehicle charging pile BMS data monitoring device, and as shown in FIGS. 1-4, the device (i.e., the data monitoring device 100) comprises a controller 101, a CAN interface module 102, a WIFI module 103, a switching value module 104, a display module 105, a storage module 106, a power supply module 107 and a backup battery module 108. The controller 101 adopts STM32F407VET6 of ST company, the corresponding bit number is U5, the CAN interface module 102 adopts TD521SCANH module of Jinshengyangyang company, and the corresponding bit number is U3; the WIFI module 103 adopts an ESP32 module of lexin corporation, and the corresponding bit number is U4. CAN transceiver and fill electric pile's CAN bus connection, controller 101 monitors on-vehicle BMS200 and fills the standard message of CAN transmission between electric pile 300 through CAN interface module 102, acquires the state of charge parameter of battery in real time and carries out local storage in order to judge whether excess temperature, excessive pressure when the battery charges to with the parameter of charging pass through wireless communication module propelling movement to cloud management platform, carry out remote management and fortune dimension by cloud management platform.

This data monitoring device 100 CAN install in filling electric pile 300, directly with the CAN bus connection in the charging station, also CAN imbed in the CAN bus adapter 400 end of installing at on-vehicle BMS200 and filling electric pile 300. Only the data monitoring device 100 needs to be connected in parallel to the CAN bus, and the message transmitted by the CAN bus CAN be effectively read and analyzed by disclosing the CAN bus protocol, so that the real-time information of the charging state CAN be obtained.

In other embodiments, the wireless communication module directly accesses the internet of things to perform remote management, typically through a mobile communication module, such as a 3G/4G/5G mobile communication module. In this embodiment, charging pile 300 is a plurality of clusters, and data monitoring device 100 and WIFI router 500 thereon are networked, as shown in fig. 5. WIFI's data transmission rate, transmission distance, the convenience of connection are all better, and the consumption is little, and consequently, wireless communication module is preferred to be WIFI module 103, fills the electric pile region and is provided with WIFI router 500, fills electric pile 300 in the region and can connect thing networking 700 through data monitoring device 100 and WIFI router 500, is connected with cloud management platform 600.

In the embodiment, the WIFI module is an embedded module which converts a serial port or a TTL level into a level meeting a Wi-Fi wireless network communication standard, and a wireless network protocol IEEE802.11b.g.n protocol stack and a TCP/IP protocol stack are built in the WIFI module. The intelligent network controller supports multi-channel TCP Client connection, has rich Socket AT instructions, realizes Smart Link intelligent networking function through UART/GPIO data communication interface and serial port communication, can remotely upgrade firmware (OTA), is internally provided with a 32-bit MCU, can be used as a controller AT the same time, has ultra-low energy consumption, is suitable for battery power supply application, and supplies power by a 3.3V single power supply. In the present embodiment, only the communication function thereof is applied.

In this embodiment, the data storage is mainly stored by an external flash, and is used for storing a key program for program operation and ensuring that data is not lost when power is cut off. The historical data of one week needs to be stored, the data volume is quite large, about 10GB exists, the storage cost of the conventional onboard data is high, the circuit is complex and is not beneficial to maintenance, and the SD card is convenient to insert and pull, can be directly taken away, can be directly read by special equipment and is low in cost. To ensure sufficient storage space, the capacity of the SD card is preferably not less than 16 GB.

In this embodiment, the display module 105 uses an LED to indicate the status, and in other embodiments, a device such as an LCD screen may be used to directly display the power parameter information and the status information on the device.

The switching value module is an alternative module, in this embodiment, a specific circuit of the switching value module is not given, and in other embodiments, one group or 2 groups of switching value signals can be provided by the switching value module 104 for local alarm or switching control, and can be used for cutting off a charging circuit of the charging gun.

In this embodiment, the power of this device is by filling electric pile 300 power supply, and in order to guarantee when filling electric pile 300 trouble, this device can also continue to work a period, to upload status information such as fault information, sets up battery backup module 108 in this device, gives the device power supply through battery backup BAT1, and battery backup BAT1 passes through diode D2 and inserts system power VBET, inserts microcontroller U5's 6 th pin, as shown in FIG. 4.

In this embodiment, an electric automobile fills electric pile BMS data monitoring device based on WIFI network deployment is provided, can be applied to the cluster management that small-scale electric automobile fills electric pile.

As shown in fig. 6, the listening flow of the present apparatus is shown. The device monitors standard messages transmitted by a CAN (controller area network) between the vehicle-mounted BMS200 and the charging pile 300, acquires charging state parameters of the battery in real time, performs local storage to judge whether the battery is over-temperature or over-voltage during charging, generates fault information, pushes the charging parameters and the fault information to a cloud management platform through a wireless communication module, and performs remote management and operation and maintenance through the cloud management platform.

And after the controller enters the CAN and receives interruption, analyzing the current date clock, and storing the data after determining the storage position of the data. The operation on the stored data can be divided into two types, one is to upload the monitored data in real time, and the other is to upload the stored historical data.

Because the speed that the CAN read is far less than WIFI communication transmission speed, consequently when data upload, all adopt periodic transmission, finish in the short time through the WIFI module to data or the analysis data of a period that the CAN gathered.

For a first group of tasks, a real-time data transmission channel is started, an RTC clock timer is started, and the data acquisition is completed after waiting for a set time of minutes. And judging whether the quantity of the collected data overflows or not, if not, packaging the data according to a protocol, and sending the data through a network. And judging the sending zone bit after the sending is finished, jumping out of the interrupt if the data sending is finished, and packing the data again for sending if the data sending is not finished.

And the second group of tasks firstly judges whether the historical data needs to be read or not, and if the stored historical data needs to be read, continuously judges whether the historical data needs to be transmitted in real time or not. And if the real-time transmission is needed, reading the needed historical data node coordinates, and judging whether the historical time coordinates are correct or not. If no error exists, judging whether the quantity of the historical data overflows or not, if not, packaging the data according to a protocol, and sending the data through a network. And judging the sending zone bit after the sending is finished, jumping out of the interrupt if the data sending is finished, and packing the data again for sending if the data sending is not finished.

In this embodiment, the data monitoring device 100 may detect an abnormality of the vehicle-mounted BMS200 during charging in time by periodically reading the CAN message and analyzing the format and content of the CAN message, and provide abnormal information, which may be displayed by the display module 105 of the data monitoring device 100 or generate an alarm signal or a switching value signal by the switching value module 104, and at the same time, upload to the cloud management platform, and be statistically analyzed by the cloud management platform and provide a disposal scheme.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.