A method and device for energy storage battery communication detection

Abstract

The present invention provides a method and device for energy storage battery communication detection, which belongs to the field of industrial control system safety technology; including MCU, CAN, RS485 communication, Ethernet, OTA upgrade, address allocation, status light, LCD display and PCS selection interface, the method is as follows, when the CAN communication terminal and the RS485 communication terminal are connected to the CAN communication, the energy storage system detection device will enter the CAN communication self-test mode, after the self-test is no problem, the LCD display will prompt that the CAN communication self-test is successful. The industrial communication method is used to realize the detection of CAN / RS485 / LAN communication, the acquisition of energy storage battery system data and OTA upgrade. The hardware cost is low, easy to use, easy to carry, and greatly improves the efficiency for manufacturing, end-user use or after-sales technician maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial control system safety, and in particular to a method and device for energy storage battery communication detection. Background Art

[0002] With the continuous acceleration of the new energy track, the electricity consumption of various industries has increased rapidly, especially the increasing demand for household electricity consumption, and the installation failure rate has also increased accordingly. In order to ensure the stability and reliability of the system before installation and use. The energy storage battery communication detection device came into being as a communication detection before the system was installed. Compared with the traditional method, it fully demonstrates its superiority in operation, allowing non-related professionals to effectively judge the quality of the system and greatly reduce unnecessary costs.

[0003] Since the installation of energy storage systems involves photovoltaics, PCS, energy storage batteries and other materials, if the various modules are not operating normally before installation, then failures after installation will result in unnecessary cost losses, so communication detection of energy storage systems is extremely important.

[0004] To monitor the complete self-inspection process of the energy storage system before installation, it is necessary to conduct modular inspections during construction and installation, so that an energy storage system communication inspection device can be used. Only in this way can timely processing be carried out when an alarm or failure occurs in a certain module.

[0005] At present, the corresponding product guarantees of many manufacturers are not perfect, and the failure rate during terminal use is relatively high. There are two common reasons for the occurrence of failures:

[0006] (1) The self-inspection steps performed by the manufacturer are relatively simple; (2) The dealers or end customers may have limited professional knowledge and are unable to analyze the current status of the product during the installation process.

[0007] At the same time, this also leads to a lot of corresponding costs, such as:

[0008] (1) Additional technicians are required to carry out maintenance; (2) An additional percentage amount needs to be paid; (3) Time costs are increased; (4) There are varying degrees of impact on the manufacturer's brand, etc. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a method and device for energy storage battery communication detection to solve the existing problems of improving the factory pass rate of energy storage systems, improving the efficiency of terminal energy storage system installation and reducing after-sales maintenance costs.

[0010] In order to solve the above comprehensive problems, the present invention provides the following technical solutions:

[0011] A method and device for energy storage battery communication detection, comprising:

[0012] MCU, responsible for controlling the entire system;

[0013] CAN communication and RS485 communication are the driving circuit parts of the CAN communication and the RS485 communication. The two perform data transmission according to the corresponding protocols, that is, external data is transmitted to the MCU through the CAN communication and the RS485 communication, so that the MCU performs corresponding actions;

[0014] Ethernet is the driving circuit part of LAN network communication. It parses the network protocol to obtain relevant information, which can be used to support product communication detection and data acquisition of Ethernet communication.

[0015] OTA upgrade is used for version update or after-sales maintenance of the energy storage battery. When the client needs to update the version, the data can be directly sent to the MCU for processing through the OTA drive circuit, thereby updating the version of the energy storage battery system;

[0016] Address allocation, allocating addresses to the MCU through hardware, and the MCU simulating different addresses and communicating with energy storage battery systems with different addresses;

[0017] The status light is used to display the quality of the CAN communication, the RS485 communication, and the Ethernet communication, which can more intuitively judge the operating status of the energy storage battery system;

[0018] LCD display screen, the data acquired through the CAN communication and the RS485 communication or the Ethernet communication can be displayed through the LCD display screen;

[0019] PCS selection interface, through the LCD display screen to select different PCS, the MCU sends corresponding instructions to the energy storage battery system, to achieve different PCS and energy storage system simulation communication;

[0020] CAN communication, the RS485 communication, the Ethernet, the OTA upgrade, the address allocation, the status light, the LCD display screen and the PCS selection interface are all electrically connected to the MCU.

[0021] Preferably, the energy storage battery communication detection device further comprises a CAN communication terminal and an RS485 communication terminal: responsible for providing an external interface for external devices to access the CAN communication terminal and the RS485 communication terminal;

[0022] CAN drive circuit 101 and RS485 drive circuit: responsible for signal conversion, converting differential signals and TTL signals to provide signal input for external devices or central processors;

[0023] The 120R resistor is the terminal resistor at the start and end of the communication bus, which is used for impedance matching to reduce echo reflection;

[0024] Central processing unit: responsible for processing the signals generated by the CAN drive circuit 101 circuit and the RS485 drive circuit and responsible for outputting data to the LCD display screen.

[0025] Preferably, S1, when the CAN communication terminal and the RS485 communication terminal are connected to the CAN communication, the energy storage system detection device will enter the CAN communication self-test mode. After the self-test is normal, the LCD display will prompt that the CAN communication self-test is successful, and the status light will flash green for 2s, otherwise, it will flash red for 2s;

[0026] S2, then the central processor continuously sends and obtains CAN bus protocol frame data, extracts data according to the same ID, and displays the data on the LCD display screen. If it is detected that the external energy storage battery system has no response for a long time, it will be further determined that the CAN communication of the external energy storage battery system is abnormal. At this time, the LCD display screen will prompt that the CAN communication is abnormal, please check the CAN communication of the energy storage battery system; the status light will display red;

[0027] S3, when the CAN communication terminal and the RS485 communication terminal are connected to the RS485 communication, the energy storage system detection device will also enter the RS485 communication self-test mode. Similarly, after the self-test is successful, the LCD display will prompt that the RS485 communication self-test is successful, and the status light will flash green for 2s, otherwise, it will flash red for 2s;

[0028] S4, then the central processor continuously sends data frames to the energy storage battery system. If a data message reply is detected, the validity of the data will be judged according to the frame header, address, data length, and CRC check value of the data. Only valid data will be uploaded to the RAM for storage, and the data will be displayed on the LCD display;

[0029] If the external energy storage battery system is detected to have no response for a long time, the energy storage system detection device will determine that the RS485 communication of the external energy storage battery system is abnormal. At this time, the LCD display will prompt that the RS485 communication is abnormal. Please check the RS485 communication of the energy storage battery system; the status light will display red;

[0030] S5, the LCD display screen: responsible for processing the data sent by the central processor, processing and displaying the signals to be detected;

[0031] Mainly displays the main parameters of the energy storage battery system, such as voltage, current, temperature, SN, software and hardware version, fault information, communication status, etc.

[0032] S6, the status light: mainly indicates the state of the central processor receiving and sending data, so as to judge whether there are abnormalities between the CAN communication terminal and the RS485 communication terminal, the CAN drive circuit and the RS485 drive circuit and the external energy storage system;

[0033] In the communication self-test mode of the energy storage system detection device, the status light will flash red or green for 2 seconds to determine whether the device is damaged; in the communication mode, it will be always red or green to determine whether the energy storage battery system is abnormal.

[0034] Preferably, the energy storage battery communication detection device also includes the Ethernet communication detection design, and the Ethernet communication detection design is composed of the Ethernet communication terminal, the LAN8720A drive circuit, the central processing unit and the LCD display screen;

[0035] The Ethernet communication terminal is responsible for providing an external interface for external devices to access the Ethernet terminal;

[0036] The LAN8720A driving circuit is responsible for cooperating with the central processor to establish network communication;

[0037] The central processor is responsible for processing the signal generated by the LAN8720A driving circuit and outputting data to the LCD display screen;

[0038] The LCD display screen is responsible for processing the data sent by the central processing unit and processing and displaying the signals required for detection.

[0039] Preferably, the specific processing steps of the LAN8720A driver circuit software are as follows:

[0040] The program starts a series of actions such as initializing LAN8720A, applying for memory, starting DHCP service, adding and opening the network card, and then waits for DHCP to successfully obtain the IP. When DHCP is successfully obtained, the IP address obtained by DHCP will be displayed on the LCD display, and then the WebServer service will be started, and the main loop will be entered to start collecting data and the central processor will process the data.

[0041] Preferably, the energy storage battery communication detection device also includes an OTA integrated design;

[0042] The OTA integrated design includes an SD card: responsible for storing two upgrade files: . / BIN or . / HEX;

[0043] The central processing unit is responsible for retrieving and reading the SD card related files and outputting and displaying them;

[0044] The LCD display screen is responsible for setting the OTA upgrade function and processing the data sent by the central processor, and processing and displaying the signals required for detection;

[0045] Serial port upgrade: responsible for the OTA upgrade of the energy storage battery system supporting the RS485 communication;

[0046] Ethernet upgrade: responsible for performing the OTA upgrade on the energy storage battery system that supports the Ethernet communication;

[0047] OTA upgrade interface: responsible for providing an external interface for external device upgrade line access.

[0048] Preferably, the energy storage battery communication detection device also includes a design for simulating communication between PCS and energy storage battery system, and the design for simulating communication between PCS and energy storage battery system is composed of the LCD display, address query, the central processor, the CAN communication and RS485;

[0049] The design of simulating communication between PCS and energy storage battery system includes the LCD display screen: by selecting PCS of different brands on the LCD display screen, and then setting the same communication address as the energy storage battery system according to the address query, after waiting for the LCD display screen and the address query processing to be completed, the central processor performs processing, and the RS485 communication actively sends different RS485 communication instructions or CAN communication instructions through CAN;

[0050] The address query: simulates the allocation of device addresses;

[0051] The central processing unit processes the communication data;

[0052] CAN, RS485 communication: responsible for signal conversion, converting differential signals and TTL signals.

[0053] Compared with the prior art, the present invention has at least the following beneficial effects:

[0054] Industrial communication methods are used to realize CAN / RS485 / LAN communication detection, energy storage battery system data acquisition and OTA upgrade. The hardware is low-cost, easy to use and carry, which greatly improves the efficiency of manufacturing production, end-user use or after-sales technician maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0056] Figure 1 A method and device for energy storage battery communication detection;

[0057] Figure 2 It is the principle block diagram of CAN and RS485 communication detection;

[0058] Figure 3 This is the principle block diagram of Ethernet communication detection;

[0059] Figure 4 This is the block diagram of OTA integration principle;

[0060] Figure 5 Design principle frame to simulate the communication between PCS and energy storage battery system;

[0061] Figure 6 Design a flow chart for the communication detection software.

[0062] [Reference Signs]

[0063] 1. MCU; 21. CAN communication; 22. RS485 communication; 3. Ethernet; 4. OTA upgrade; 5. Address allocation; 6. Status light; 7. LCD display; 8. PCS selection interface; 91. CAN communication terminal; 92. RS485 communication terminal; 101. CAN drive circuit, 102. RS485 drive circuit; 11. Central processing unit; 12. Ethernet communication terminal; 13. LAN8720A drive circuit; 14. SD card; 15. Serial port upgrade; 16. Ethernet upgrade; 17. OTA upgrade interface; 18. Address query.

[0064] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0065] The following is a detailed description of a method and device for energy storage battery communication detection provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0066] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0067] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0068] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0069] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0070] A method and device for energy storage battery communication detection, including an MCU responsible for controlling the entire system;

[0071] CAN communication and RS485 communication are the driving circuit parts of the CAN communication and the RS485 communication. The two perform data transmission according to the corresponding protocols, that is, external data is transmitted to the MCU through the CAN communication and the RS485 communication, so that the MCU performs corresponding actions;

[0072] Ethernet is the driving circuit part of LAN network communication. It parses the network protocol to obtain relevant information, which can be used to support product communication detection and data acquisition of Ethernet communication.

[0073] OTA upgrade is used for version update or after-sales maintenance of the energy storage battery. When the client needs to update the version, the data can be directly sent to the MCU for processing through the OTA drive circuit, thereby updating the version of the energy storage battery system;

[0074] Address allocation, allocating addresses to the MCU through hardware, and the MCU simulating different addresses and communicating with energy storage battery systems with different addresses;

[0075] The status light is used to display the quality of the CAN communication, the RS485 communication, and the Ethernet communication, which can more intuitively judge the operating status of the energy storage battery system;

[0076] LCD display screen, the data acquired through the CAN communication and the RS485 communication or the Ethernet communication can be displayed through the LCD display screen;

[0077] PCS selection interface, through the LCD display screen to select different PCS, the MCU sends corresponding instructions to the energy storage battery system, to achieve different PCS and energy storage system simulation communication;

[0078] CAN communication, the RS485 communication, the Ethernet, the OTA upgrade, the address allocation, the status light, the LCD display screen and the PCS selection interface are all electrically connected to the MCU.

[0079] The energy storage battery communication detection device also includes a CAN communication terminal and an RS485 communication terminal: responsible for providing an external interface for external devices to access the CAN communication terminal and the RS485 communication terminal;

[0080] CAN drive circuit 101 and RS485 drive circuit: responsible for signal conversion, converting differential signals and TTL signals to provide signal input for external devices or central processing units;

[0081] The 120R resistor is the terminal resistor at the start and end of the communication bus, which is used for impedance matching to reduce echo reflection;

[0082] Central processing unit: responsible for processing the signals generated by the CAN drive circuit 101 circuit and the RS485 drive circuit and responsible for outputting data to the LCD display screen.

[0083] The specific detection methods are as follows:

[0084] S1. When the CAN communication terminal and the RS485 communication terminal are connected to the CAN communication, the energy storage system detection device will enter the CAN communication self-test mode. After the self-test is normal, the LCD display will prompt that the CAN communication self-test is successful, and the status light will flash green for 2s, otherwise, it will flash red for 2s;

[0085] S2, then the central processor continuously sends and obtains CAN bus protocol frame data, extracts data according to the same ID, and displays the data on the LCD display screen. If it is detected that the external energy storage battery system has no response for a long time, it will be further determined that the CAN communication of the external energy storage battery system is abnormal. At this time, the LCD display screen will prompt that the CAN communication is abnormal, please check the CAN communication of the energy storage battery system; the status light will display red;

[0086] S3, when the CAN communication terminal and the RS485 communication terminal are connected to the RS485 communication, the energy storage system detection device will also enter the RS485 communication self-test mode. Similarly, after the self-test is successful, the LCD display will prompt that the RS485 communication self-test is successful, and the status light will flash green for 2s, otherwise, it will flash red for 2s;

[0087] S4, then the central processor continuously sends data frames to the energy storage battery system. If a data message reply is detected, the validity of the data will be judged according to the frame header, address, data length, and CRC check value of the data. Only valid data will be uploaded to the RAM for storage, and the data will be displayed on the LCD display;

[0088] If the external energy storage battery system is detected to have no response for a long time, the energy storage system detection device will determine that the RS485 communication of the external energy storage battery system is abnormal. At this time, the LCD display will prompt that the RS485 communication is abnormal. Please check the RS485 communication of the energy storage battery system; the status light will display red;

[0089] S5, the LCD display screen: responsible for processing the data sent by the central processor, processing and displaying the signals to be detected;

[0090] Mainly displays the main parameters of the energy storage battery system, such as voltage, current, temperature, SN, software and hardware version, fault information, communication status, etc.

[0091] S6, the status light: mainly indicates the state of the central processor receiving and sending data, so as to judge whether there are abnormalities between the CAN communication terminal and the RS485 communication terminal, the CAN drive circuit 101 and the RS485 drive circuit and the external energy storage system;

[0092] In the communication self-test mode of the energy storage system detection device, the status light will flash red or green for 2 seconds to determine whether the device is damaged; in the communication mode, it will be always red or green to determine whether the energy storage battery system is abnormal.

[0093] The energy storage battery communication detection device also includes the Ethernet communication detection design, which is composed of the Ethernet communication terminal, the LAN8720A drive circuit, the central processing unit and the LCD display screen;

[0094] The Ethernet communication terminal is responsible for providing an external interface for external devices to access the Ethernet terminal;

[0095] The LAN8720A driving circuit is responsible for cooperating with the central processor to establish network communication;

[0096] The central processor is responsible for processing the signal generated by the LAN8720A driving circuit and outputting data to the LCD display screen;

[0097] The LCD display screen is responsible for processing the data sent by the central processing unit and processing and displaying the signals required for detection.

[0098] The specific processing steps of the LAN8720A driver circuit software are as follows:

[0099] The program starts a series of actions such as initializing LAN8720A, applying for memory, starting DHCP service, adding and opening the network card, and then waits for DHCP to successfully obtain the IP. When DHCP is successfully obtained, the IP address obtained by DHCP will be displayed on the LCD display, and then the WebServer service will be started, and the main loop will be entered to start collecting data and the central processor will process the data.

[0100] The energy storage battery communication detection device also includes an OTA integrated design;

[0101] The OTA integrated design includes an SD card: responsible for storing two upgrade files: . / BIN or . / HEX;

[0102] The central processing unit is responsible for retrieving and reading the SD card related files and outputting them for display;

[0103] The LCD display screen is responsible for setting the OTA upgrade function and processing the data sent by the central processor, and processing and displaying the signals required for detection;

[0104] Serial port upgrade: responsible for the OTA upgrade of the energy storage battery system supporting the RS485 communication;

[0105] Ethernet upgrade: responsible for performing the OTA upgrade on the energy storage battery system that supports the Ethernet communication;

[0106] OTA upgrade interface: responsible for providing an external interface for external device upgrade line access.

[0107] The energy storage battery communication detection device also includes a design for simulating communication between PCS and energy storage battery system, and the design for simulating communication between PCS and energy storage battery system is composed of the LCD display, address query, the central processor, the CAN communication and RS485;

[0108] The design of simulating communication between PCS and energy storage battery system includes the LCD display screen: by selecting PCS of different brands on the LCD display screen, and then setting the same communication address as the energy storage battery system according to the address query, after waiting for the LCD display screen and the address query processing to be completed, the central processor performs processing, and the RS485 communication actively sends different RS485 communication instructions or CAN communication instructions through CAN;

[0109] The address query: simulates the allocation of device addresses;

[0110] The central processing unit processes the communication data;

[0111] CAN, RS485 communication: responsible for signal conversion, converting differential signals and TTL signals.

[0112] The present invention has the following important effects:

[0113] (1) Check whether the communication network ports of the entire series of energy storage batteries are effective. This includes the detection of multiple communication network ports such as RS485, CAN, and LAN for both high-voltage and low-voltage series;

[0114] (2) Collect important parameters of energy storage batteries, such as voltage, current, SOC, SN code, software version, alarm information, protection information, external module status and save the data in real time;

[0115] (3) Simulate the communication between inverters of different brands and energy storage batteries;

[0116] (4) Integrated OTA upgrade.

[0117] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0118] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0119] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for energy storage battery communication detection, characterized in that: The energy storage battery communication detection device includes an MCU, which is responsible for controlling the entire system; CAN communication and RS485 communication are the driving circuit parts of the CAN communication and the RS485 communication. The two perform data transmission according to the corresponding protocols, that is, external data is transmitted to the MCU through the CAN communication and the RS485 communication, so that the MCU performs corresponding actions; Ethernet is the driving circuit part of LAN network communication. It parses the network protocol to obtain relevant information for communication detection and data acquisition of products supporting Ethernet communication. OTA upgrade is used for version update or after-sales maintenance of the energy storage battery. When the client needs to update the version, the data is directly transmitted to the MCU for processing through the OTA drive circuit, thereby updating the version of the energy storage battery system; Address allocation, allocating addresses to the MCU through hardware, and the MCU simulating different addresses and communicating with energy storage battery systems with different addresses; Status lights, used to display the quality of the CAN communication, the RS485 communication and the Ethernet communication, and to judge the operating status of the energy storage battery system; LCD display screen, the data acquired through the CAN communication and the RS485 communication or the Ethernet communication is displayed through the LCD display screen; PCS selection interface, through the LCD display screen to select different PCS, the MCU sends corresponding instructions to the energy storage battery system, to achieve different PCS and energy storage system simulation communication; CAN communication, the RS485 communication, the Ethernet, the OTA upgrade, the address allocation, the status light, the LCD display screen and the PCS selection interface are all electrically connected to the MCU.

2. The device for energy storage battery communication detection according to claim 1, characterized in that: The energy storage battery communication detection device also includes a CAN communication terminal and an RS485 communication terminal: responsible for providing an external interface for access to the CAN communication terminal and the RS485 communication terminal of an external device; CAN drive circuit 101 and RS485 drive circuit: responsible for signal conversion, converting differential signals and TTL signals to provide signal input for external devices or central processors; The 120R resistor is the terminal resistor at the start and end of the communication bus, which is used for impedance matching to reduce echo reflection; Central processing unit: responsible for processing the signals generated by the CAN drive circuit 101 and the RS485 drive circuit and for outputting data to the LCD display screen.

3. A method for energy storage battery communication detection, characterized in that: The device used in claim 2 is used for detection, and the specific detection method is as follows: S1. When the CAN communication terminal and the RS485 communication terminal are connected to the CAN communication, the energy storage system detection device will enter the CAN communication self-test mode. After the self-test is normal, the LCD display will prompt that the CAN communication self-test is successful, and the status light will flash green for 2s, otherwise, it will flash red for 2s; S2, then the central processor continuously sends and obtains CAN bus protocol frame data, extracts data according to the same ID, and displays the data on the LCD display screen. If it is detected that the external energy storage battery system has no response for a long time, it will be further determined that the CAN communication of the external energy storage battery system is abnormal. At this time, the LCD display screen will prompt that the CAN communication is abnormal, please check the CAN communication of the energy storage battery system; the status light will display red; S3, when the CAN communication terminal and the RS485 communication terminal are connected to the RS485 communication, the energy storage system detection device will also enter the RS485 communication self-test mode. Similarly, after the self-test is successful, the LCD display will prompt that the RS485 communication self-test is successful, and the status light will flash green for 2s, otherwise, it will flash red for 2s; S4, then the central processor continuously sends data frames to the energy storage battery system. If a data message reply is detected, the validity of the data will be judged according to the frame header, address, data length, and CRC check value of the data. Only valid data will be uploaded to the RAM for storage, and the data will be displayed on the LCD display; If the external energy storage battery system is detected to have no response for a long time, the energy storage system detection device will determine that the RS485 communication of the external energy storage battery system is abnormal. At this time, the LCD display will prompt that the RS485 communication is abnormal. Please check the RS485 communication of the energy storage battery system; the status light will display red; S5, the LCD display screen: responsible for processing the data sent by the central processor, processing and displaying the signals to be detected; Mainly displays the parameters of the energy storage battery system, including voltage, current, temperature, SN, software and hardware versions, fault information, and communication status; S6, the status light: mainly indicates the state of the central processor receiving and sending data, so as to judge whether there are abnormalities between the CAN communication terminal and the RS485 communication terminal, the CAN drive circuit 101 and the RS485 drive circuit and the external energy storage system; In the communication self-test mode of the energy storage system detection device, the status light will flash red or green for 2 seconds to determine whether the device is damaged; in the communication mode, it will be always red or green to determine whether the energy storage battery system is abnormal.

4. The device for detecting communication of energy storage batteries according to claim 2, characterized in that: The energy storage battery communication detection device also includes the Ethernet communication detection design, which is composed of an Ethernet communication terminal, a LAN8720A drive circuit, the central processing unit and the LCD display screen; The Ethernet communication terminal is responsible for providing an external interface for the Ethernet terminal of an external device to access; The LAN8720A driving circuit is responsible for cooperating with the central processor to establish network communication; The central processor is responsible for processing the signal generated by the LAN8720A driving circuit and outputting data to the LCD display screen; The LCD display screen is responsible for processing the data sent by the central processing unit and processing and displaying the signals required for detection.

5. The method for energy storage battery communication detection according to claim 3, characterized in that: Specific processing steps on the LAN8720A driver circuit software: The program starts to initialize LAN8720A, apply for memory, start DHCP service, add and open the network card action, and then wait for DHCP to successfully obtain the IP. When DHCP is successfully obtained, the IP address obtained by DHCP will be displayed on the LCD display, and then the WebServer service will be started, and the main loop will be entered to start collecting data and the central processor will process the data.

6. The device for energy storage battery communication detection according to claim 2, characterized in that: The energy storage battery communication detection device also includes an OTA integrated design; The OTA integrated design includes an SD card: responsible for storing two upgrade files: . / BIN or . / HEX; The central processing unit is responsible for retrieving and reading the SD card related files and outputting them for display; The LCD display screen is responsible for setting the OTA upgrade function and processing the data sent by the central processor, and processing and displaying the signals required for detection; Serial port upgrade: responsible for the OTA upgrade of the energy storage battery system supporting the RS485 communication; Ethernet upgrade: responsible for performing the OTA upgrade on the energy storage battery system that supports the Ethernet communication; OTA upgrade interface: responsible for providing an external interface for external device upgrade line access.

7. The device for detecting communication of energy storage batteries according to claim 2, characterized in that: The energy storage battery communication detection device also includes a design for simulating communication between PCS and energy storage battery system, and the design for simulating communication between PCS and energy storage battery system is composed of the LCD display, address query, the central processor, the CAN communication and RS485; The design of simulating communication between PCS and energy storage battery system includes the LCD display screen: by selecting PCS of different brands on the LCD display screen, and then setting the same communication address as the energy storage battery system according to the address query, after waiting for the LCD display screen and the address query processing to be completed, the central processor performs processing, and the RS485 communication actively sends different RS485 communication instructions or CAN communication instructions through CAN; The address query: simulates the allocation of device addresses; The central processing unit processes the communication data; CAN, RS485 communication: responsible for signal conversion, converting differential signals and TTL signals.

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