A communication switching control device and an energy storage system
By using a high-speed analog switch and microcontroller in the communication switching control device, a smooth switching between purchased and self-developed data acquisition rods and real-time data acquisition of the battery pack were achieved, solving communication conflicts and security issues in the energy storage system and reducing development costs and time.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 瑞河(重庆)新能源科技有限公司
- Filing Date
- 2025-09-04
- Publication Date
- 2026-07-03
Smart Images
Figure CN224459819U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of new energy technology, specifically to a communication switching control device and an energy storage system. Background Technology
[0002] As the global energy structure shifts towards cleaner and smarter energy, the large-scale application of energy storage systems is becoming increasingly widespread. In energy storage system integration projects, a hybrid procurement strategy is often adopted: for mature equipment such as inverters, products from equipment manufacturers are purchased; for key components such as battery packs and data collection rods, self-developed products are used to create a differentiated competitive advantage. However, this hybrid integration model faces the following challenges.
[0003] (1) Development limitations and coexistence conflicts: Purchased finished inverters usually come with a closed-loop data acquisition bar. Its communication protocol and interface are limited by the manufacturer. If customized functions or replacement parts are required, the original data acquisition bar may not be shielded and the manufacturer's technical support may be required. If a self-developed data acquisition bar is connected to the inverter to realize extended functions, parallel operation will occur. Because the communication protocols used by the purchased data acquisition bar and the self-developed data acquisition bar are different, communication link conflicts or address overlaps and data chaos are likely to occur.
[0004] (2) Development cycle and cost: In general integrated project development, integrators need to use externally purchased data acquisition rods to quickly verify the feasibility of the system. They can switch to the self-developed data acquisition rods after they are running stably. However, for externally purchased closed data acquisition rods, manufacturers will not fully release the protocol content and control logic, resulting in a long verification cycle and prolonging the development cycle. In addition, key operations of the battery pack, such as OTA upgrades, need to be indirectly implemented through the protocol interface provided by the inverter manufacturer. This may require a lot of time to coordinate the development between the battery pack manufacturer and the inverter manufacturer, which greatly affects the project progress and development cost.
[0005] (3) Lack of security in integrated systems: In traditional energy storage systems, the battery pack is only connected to the inverter and not to the data collection rod. If the data collection rod wants the battery pack information data, it must go through the inverter to obtain it, which makes it impossible to obtain the battery pack information in real time. Moreover, for some manufacturers' inverters, the battery pack information data they open is very limited. The cloud cannot obtain a large amount of battery pack data through the data collection rod, and cannot perform further data analysis and status prediction on the battery pack, which reduces the safety and reliability of the product.
[0006] Therefore, in energy storage integration projects, there is an urgent need for a solution that balances the conflict between purchasing externally sourced and self-developed data collection rods, the efficiency and cost of self-developed data collection rods, and system security. Utility Model Content
[0007] This invention provides a communication switching control device and an energy storage system to solve the above-mentioned problems.
[0008] This utility model is achieved through the following technical solution:
[0009] In a first aspect, a communication switching control device is provided for use in an energy storage system, the energy storage system including an inverter, a battery pack, a first data acquisition rod, and a second data acquisition rod; the communication switching control device includes:
[0010] The first communication link has a first port for connecting to the first acquisition rod, a second port for connecting to the second acquisition rod, a third port for connecting to the inverter, and a signal transmission channel between the first port, the second port, and the third port.
[0011] The second communication link has a fourth port for accessing the inverter, a fifth port for accessing the battery pack, and a signal transmission channel between the fourth port and the fifth port;
[0012] A high-speed analog switch is installed on the first communication link and the second communication link;
[0013] A microcontroller with a monitoring circuit and a switching control circuit;
[0014] The monitoring circuit is connected to the first communication link and the second communication link respectively to monitor the communication signals on the first communication link and the second communication link respectively;
[0015] The switch control circuit is connected to the high-speed analog switches on the first communication link and the second communication link respectively, so as to control the on and off of the first communication link and the second communication link respectively.
[0016] In some implementations, the first communication link has a first intermediate connection point, the first port is connected to the first intermediate connection point via a first high-speed analog switch, and the second port and the third port are directly connected to the intermediate connection point respectively.
[0017] In some implementations, the first communication link has a first monitoring point, which is located between the first intermediate connection point and the third port; the monitoring circuit is connected to the first monitoring point to monitor the communication signal between the first intermediate connection point and the third port on the first communication link.
[0018] In some implementations, the second communication link has a second intermediate connection point, the fourth port is connected to the second intermediate connection point via a second high-speed analog switch, and the fifth port is directly connected to the second intermediate connection point.
[0019] In some embodiments, the second communication link has a second monitoring point, which is located between the second intermediate connection point and the fifth port; the monitoring circuit is connected to the second monitoring point to monitor the communication signal between the second intermediate connection point and the fifth port on the second communication link.
[0020] In some embodiments, the monitoring circuit includes a first monitoring circuit and a second monitoring circuit; the first monitoring circuit is connected to the first communication link and is used to monitor a first communication signal on the first communication link; the second monitoring circuit is connected to the second communication link and is used to monitor a second communication signal on the second communication link.
[0021] In some implementations, the first data collection rod is a built-in enclosed data collection rod of the inverter, and the second data collection rod is an additional data collection rod.
[0022] In some implementations, the microcontroller is communicatively connected to the cloud to send monitored communication signals to the cloud and to receive cloud control commands.
[0023] In some embodiments, the communication switching control device further includes an indicator module connected to the microcontroller for indicating the status of the high-speed analog switch.
[0024] In a second aspect, an energy storage system is provided, comprising an inverter, a battery pack, a first data acquisition rod, a second data acquisition rod, and a communication switching control device as described in any one of the first aspects of this utility model.
[0025] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0026] The system supports access control for dual data acquisition rods via a first communication link and a high-speed analog switch on that link, enabling switching between purchased and self-developed data acquisition rods and allowing for on-demand shielding of data acquisition rods to avoid operational conflicts between different data acquisition rods in the energy storage integrated system. A second communication link and its high-speed analog switch enable separate control of the battery pack and inverter, meeting the needs of various operating scenarios. For example, communication switching control allows for direct OTA upgrades of the battery pack from self-developed data acquisition rods, reducing reliance on external equipment manufacturers. Microcontroller monitoring of both the first and second communication links provides data support for rapid verification of purchased data acquisition rods, pre-research of self-developed data acquisition rods, and fault analysis, shortening development time and costs. Real-time monitoring of battery pack data via the second communication link, without going through the inverter, ensures system safety and reliability. Furthermore, the communication switching control based on high-speed analog switches offers advantages such as low cost, ease of development, small size, and easy assembly, facilitating PCB layout in energy storage systems. Attached Figure Description
[0027] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:
[0028] Figure 1 This is an application scenario diagram of a communication switching control device;
[0029] Figure 2 This is a schematic diagram of a communication switching control device;
[0030] Figure 3 This is a schematic diagram of a microcontroller;
[0031] Figure 4 This is a schematic diagram of yet another type of communication switching control device;
[0032] The reference numerals in the attached figures are explained as follows: 100-Communication switching control device; 10-Inverter; 20-Battery pack; 30-First acquisition rod; 40-Second acquisition rod; 210-First communication link; 220-Second communication link; 230-High-speed analog switch; 240-Microcontroller; 241-Monitoring circuit; 242-Switch control circuit; 250-Indicator light module. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0034] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to other steps or units inherent in the device.
[0035] The terminology used in the various embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this application pertain. The terms (such as those defined in a generally used dictionary) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this application.
[0036] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, well-known structures, circuits, materials, or methods are not specifically described in order to avoid obscuring the present invention.
[0037] To address the challenges faced by energy storage integrators in developing energy storage systems through the mixed procurement of inverters, battery packs, and other components, this invention provides a communication switching and control device for energy storage integration systems. This device enables control access for both externally purchased and self-developed data acquisition rods, as well as real-time data acquisition from battery packs. It resolves the shortcomings of parallel conflicts between dual data acquisition rods, system security issues, long development cycles, and high costs.
[0038] In existing communication switching control technologies, physical switches, signal relays, or data isolators are commonly used to control the communication loop. However, these devices are expensive, occupy a large PCB area, are unsuitable for integrated energy storage systems, and cannot solve problems such as real-time acquisition of battery pack information and OTA upgrades. Therefore, this invention proposes a device for communication switching control of an energy storage system using a high-speed analog switch, which has the advantages of low cost, ease of development, small size, and easy assembly.
[0039] See Figure 1 , Figure 1 The diagram illustrates an application scenario of the communication switching control device 100 proposed in this invention, which is used in an energy storage system for communication switching and control of communication loops. The energy storage system integrates an inverter 10, a battery pack 20, a first data acquisition rod 30, and a second data acquisition rod 40. The inverter and battery pack can be products sourced from different manufacturers. The first and second data acquisition rods can be based on different protocols and control logics. For example, the first data acquisition rod could be a closed-loop data acquisition rod integrated into the purchased inverter, while the second data acquisition rod could be a self-developed data acquisition rod added by the integration manufacturer. The communication switching control device 100 is used for switching communication between the inverter 10, battery pack 20, first data acquisition rod 30, and second data acquisition rod 40.
[0040] See Figure 2 As shown, Figure 2 This is a schematic diagram of the communication switching control device 100, which includes a first communication link 210, a second communication link 220, a high-speed analog switch 230, and a microcontroller 240.
[0041] The first communication link 210 consists of a signal transmission channel and communication ports, including a first port P1 for connecting the first acquisition rod 30, a second port P2 for connecting the second acquisition rod 40, and a third port P3 for connecting the inverter 10. The signal transmission channel is located between the first port P1, the second port P2, and the third port P3, as shown by communication connection lines 1.1 and 1.2 in the figure, and is used to realize communication between the connected first acquisition rod 30, the second acquisition rod 40, and the connected inverter 10.
[0042] The second communication link 220 includes a fourth port P4 for connecting the inverter 10, a fifth port P5 for connecting the battery pack 20, and a signal transmission channel, such as a communication connection line 2.1, between the fourth port P4 and the fifth port P5.
[0043] High-speed analog switches 230 are respectively installed on the first communication link and the second communication link. For example, the first high-speed analog switch installed between the first port P1 and the third port P2, and the second high-speed analog switch installed between the fourth port P4 and the fifth port P5, form a communication link between the first port P1, the second port P2, the third port P3 and the first high-speed analog switch through communication connection lines 1.1 and 1.2, and the fourth port P4, the fifth port P5, the second high-speed analog switch and communication connection line 2.1 form a communication link. In addition, a high-speed analog switch can also be installed between the second port P2 and the third port P3.
[0044] By setting the first communication link, two data acquisition rods can be connected in parallel to the inverter 10. By setting the high-speed analog switch, the dominant communication link of the first port P1 and the second port P2 can be switched, thereby realizing the access control of the two data acquisition rods and achieving a smooth transition from "rapid verification of purchased equipment to seamless takeover of self-developed equipment".
[0045] By setting a second communication link and a high-speed analog switch, the inverter 10 and the battery pack 20 can be controlled separately. When the second communication link is connected, the communication switching device can monitor the communication data between the inverter and the battery pack through the second communication link, and can also cut off the communication between the inverter and the battery pack, so as to realize real-time monitoring of the battery pack status data. The fault information of the battery pack can be obtained in a timely manner without going through the inverter, which greatly improves the safety and reliability of the product.
[0046] like Figure 3As shown, the microcontroller MCU240 has a monitoring circuit 241 and a switch control circuit 242. The monitoring circuit is connected to the first communication link and the second communication link respectively to monitor the communication signals on the first and second communication links. The monitoring circuit 241 can be connected to one or more arbitrary monitoring points on the first and second communication links, such as monitoring the communication signals on signal connection lines 1.1, 1.2, and 2.1 respectively. The switch control circuit is connected to high-speed analog switches on the first and second communication links respectively, and can control the on / off state of the first and second communication links by controlling the high-speed analog switches.
[0047] In the above implementation scheme, the third port P3 of the communication switching control device 100 is connected to the inverter 10, drawing power from the inverter 10. Inside the communication switching control device, after the inverter is connected, it is connected via a first high-speed analog switch to a first acquisition rod 30 connected via the first port P1, and can also be connected to a second acquisition rod 40 connected via the second port P2, achieving dual acquisition rod access. The first acquisition rod 30, the second acquisition rod 40, and the inverter 10 follow the communication mode of the first communication link. A monitoring circuit is connected to the first communication link 210 to monitor the inverter. When the first high-speed analog switch is on, monitoring is conducted via the first acquisition rod; when the second acquisition rod 40 is connected, monitoring is conducted via the second acquisition rod. Based on the high-speed analog switch control, smooth switching of the monitoring link is achieved.
[0048] The monitoring circuit 241 monitors the first acquisition stick. When the first acquisition stick is an externally purchased acquisition stick, by analyzing the data monitored by the externally purchased acquisition stick, the private protocol of the externally purchased equipment can be cracked and analyzed in the cloud using AI. The control logic and strategy of the externally purchased acquisition stick to the externally purchased inverter can be summarized, which prepares for self-developed replacement.
[0049] Once the self-developed data acquisition stick and cloud service are online, adding custom functions requires the self-developed data acquisition stick to send commands to the monitoring bus to obtain inverter data. At this point, simply turning off the first high-speed analog switch allows the self-developed data acquisition stick to independently control the inverter via the first communication link. When the first high-speed analog switch is on, "Data Acquisition Stick 1 - Self-developed" can monitor the "Communication 1" bus data and collect command data from the communication between "Data Acquisition Stick 2 - Purchased" and the inverter. This data is then used in the cloud for AI-based protocol cracking and hidden function analysis, preparing integrators for self-developed technologies.
[0050] The inverter and battery pack communicate via a second communication link. The battery pack is connected to the inverter via a second high-speed analog switch in the communication switching control device. When the second high-speed analog switch is on, the inverter and battery pack communicate through the second communication link. The monitoring device acquires battery pack data by monitoring the second communication link. If the battery pack reports fault or abnormal information, timely intervention can be performed. When OTA operation of the battery pack is required, the second high-speed analog switch can be turned off, blocking the inverter's data transmission and reception on the monitoring bus. This allows the self-developed acquisition rod to directly upgrade the battery pack via the communication switching control device, greatly improving the overall safety, reliability, and self-control of the product, and reducing dependence on external equipment manufacturers.
[0051] The communication switching control device uses two independent communication methods, one for the inverter and the other for the battery pack. This way, if one of them fails, it will not affect the other communication link.
[0052] In a preferred embodiment, the first communication link 210 has a first intermediate connection point M1, which is located on the signal transmission channel between the first port P1 and the third port P2 (such as communication connection line 1.1). The first high-speed analog switch is set on the signal transmission channel between the first port P1 and the first intermediate connection point M1. The second port P2 and the third port P3 are directly connected to the intermediate connection point M1, respectively.
[0053] This approach only requires a high-speed analog switch on the first communication link, flexibly controlling the access of externally purchased data acquisition sticks. After the self-developed data acquisition stick and cloud service are online, commands are sent from the cloud to the self-developed data acquisition stick, which then sends commands to the communication switching control device for easy control. No manual intervention is required for the switching, enabling switching between parallel operation of two data acquisition sticks or single operation of the self-developed data acquisition stick, adapting to different needs. For example, before the self-developed data acquisition stick is online, the first communication link uses communication monitoring technology to monitor and upload the signal between the externally purchased data acquisition stick and the inverter in real time, providing important data support for cloud AI. When the externally purchased data acquisition stick fails, the self-developed data acquisition stick can disconnect the first high-speed analog switch and directly take over the communication switching control device, reducing the product failure rate.
[0054] Furthermore, a first monitoring point D1 is set on the first communication link 210, and the first monitoring point D1 is set between the first intermediate connection point M1 and the third port P3. A monitoring circuit is connected to the first monitoring point D1 (such as monitoring line 3,1) to monitor the communication signal between the first intermediate connection point M1 and the third port P3.
[0055] The setting of the first monitoring point D1 enables monitoring of inverter data in both parallel and single-scanning modes. When it is necessary to replace the existing externally purchased capture sticks and gradually switch to self-developed capture sticks, the communication of the externally purchased capture sticks is blocked by turning off the first high-speed analog switch, enabling independent communication between the self-developed capture sticks and the inverter. During this process, the communication monitoring function continues to monitor the bus data, ensuring that no instructions are lost during the self-developed replacement process and supporting the future development of new functions for the self-developed capture sticks.
[0056] In a preferred embodiment, the second communication link has a second intermediate connection point M2, the fourth port P4 is connected to the second intermediate connection point M2 via a second high-speed analog switch, and the fifth port P5 is directly connected to the second intermediate connection point.
[0057] Furthermore, the second monitoring point D2 is set between the second intermediate connection point M2 and the fifth port P5. The monitoring circuit is connected to the second monitoring point D2 (e.g., monitoring line 3,2) to monitor the communication signal between the second intermediate connection point M2 and the fifth port P5.
[0058] This approach provides a direct data connection between the battery pack and the MCU. When OTA upgrades or other operations are required for the battery pack, the second high-speed analog switch can be turned off, blocking communication between the inverter and the battery pack, while retaining the direct data connection between the data acquisition rod 1 and the battery pack via the communication adapter. Under this dedicated channel, OTA upgrades can achieve full network security isolation, avoid data conflicts, improve upgrade efficiency, and ensure operational safety.
[0059] In a preferred embodiment, the monitoring circuit includes a first monitoring circuit and a second monitoring circuit. The first monitoring circuit is connected to a first communication link and is used to monitor a first communication signal on the first communication link; the second monitoring circuit is connected to a second communication link and is used to monitor a second communication signal on the second communication link.
[0060] Using a first monitoring circuit and a second monitoring circuit to monitor the first and second communication links respectively can achieve better data isolation and processing speed. When abnormal data or commands that do not conform to the operating logic are detected at the inverter end, the device can quickly capture and record the specific abnormal information with the help of the MCU's real-time processing capabilities. At the same time, the abnormal command can be isolated locally through the first high-speed switch to prevent the abnormal command from affecting the overall function. When the battery pack uploads fault information to the second monitoring circuit through the second communication link, the device can monitor the abnormal node in real time and identify the cause of the problem, and quickly handle the local fault status using the MCU.
[0061] Specifically, the first monitoring circuit is connected to the first monitoring point D1, and the second monitoring circuit is connected to the second monitoring point D2. Both the first and second monitoring circuits employ existing monitoring technologies. The first monitoring circuit, such as an optocoupler and level conversion chip, isolates the communication bus signal between the sensor and the inverter via the optocoupler, then converts the signal into a level recognizable by the microcontroller, enabling real-time monitoring of the communication signal. The second monitoring circuit, such as a CAN transceiver, extracts differential signals from the communication bus between the battery pack and the inverter, isolates them via a digital isolator, and transmits them to the microcontroller's CAN interface, enabling monitoring of battery pack status data and communication commands. If other buses (such as I2C) are used, a corresponding transceiver (such as the PCA9517) can be used instead.
[0062] Furthermore, the microcontroller (MCU) communicates with the cloud. When the system detects abnormal data or commands that do not conform to the operating logic at the inverter end, or when the battery pack uploads fault information, it uses the MCU to quickly process the local fault status and simultaneously reports detailed abnormal data to the cloud for in-depth analysis. Combined with cloud-based AI decision optimization, specific repair instructions are generated to promptly correct the fault. The switch control circuit receives control signals from the cloud and drives a high-speed analog switch based on GPIO. The GPIO pins of the microcontroller are directly connected to the control terminal of the high-speed analog switch. The circuit outputs high and low levels based on the cloud control signals to control the on / off state of the analog switch, thereby switching between the first and second communication links.
[0063] Furthermore, when users need to collect communication data between the inverter and the battery pack for analysis, the device can keep the "High-Speed Analog Switch - Communication 2" on. Utilizing the monitoring function, it can perform in-depth monitoring of the bus data without interfering with the existing communication channel and upload the data to local or cloud storage. Users can then use this data to support subsequent debugging or functional expansion development.
[0064] In a preferred embodiment, the communication switching control device further includes an indicator light module 250, such as... Figure 4 As shown, the indicator module is connected to the microcontroller (MCU) and is used to indicate the status of the high-speed analog switches. For example, the indicator module uses multiple indicators to represent different high-speed analog switches, with different colors indicating different operating states of the high-speed analog switches. Different indication rules can also be set to differentiate them; for example, a 1-second on / off indicator means "High-speed analog switch - Communication 1" is off, disabling "Data acquisition rod 2 - External purchase"; a 2-second on / off indicator means "High-speed analog switch - Communication 2" is off, disabling communication between the inverter and battery pack, facilitating understanding of the real-time operating status of the communication switching control device.
[0065] The indicator module 250 is located in a visible position on the communication switching control device, such as on the surface of the housing. The MCU, high-speed analog switch, signal transmission channel, and communication port are integrated on the PCB board and located inside the housing.
[0066] This utility model also provides an energy storage system that applies the communication switching control device of any of the above embodiments, such as... Figure 1 As shown, the energy storage system includes an inverter 10, a battery pack 20, a first data acquisition rod 30, a second data acquisition rod 40, and a communication switching control device 100.
[0067] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A communication relay control device applied to an energy storage system, characterized in that, The energy storage system includes an inverter, a battery pack, a first data acquisition rod, and a second data acquisition rod; the communication switching control device includes: The first communication link has a first port for connecting to the first acquisition rod, a second port for connecting to the second acquisition rod, a third port for connecting to the inverter, and a signal transmission channel between the first port, the second port, and the third port. The second communication link has a fourth port for accessing the inverter, a fifth port for accessing the battery pack, and a signal transmission channel between the fourth port and the fifth port; A high-speed analog switch is installed on the first communication link and the second communication link; A microcontroller with a monitoring circuit and a switching control circuit; The monitoring circuit is connected to the first communication link and the second communication link respectively to monitor the communication signals on the first communication link and the second communication link respectively; The switch control circuit is connected to the high-speed analog switches on the first communication link and the second communication link respectively, so as to control the on and off of the first communication link and the second communication link respectively.
2. The communication relay control device according to claim 1, wherein The first communication link has a first intermediate connection point. The first port is connected to the first intermediate connection point via a first high-speed analog switch. The second port and the third port are directly connected to the intermediate connection point, respectively.
3. The communication relay control device according to claim 2, wherein The first communication link has a first monitoring point, which is located between the first intermediate connection point and the third port; the monitoring circuit is connected to the first monitoring point to monitor the communication signal between the first intermediate connection point and the third port on the first communication link.
4. The communication relay control device according to claim 1, wherein The second communication link has a second intermediate connection point, the fourth port is connected to the second intermediate connection point via a second high-speed analog switch, and the fifth port is directly connected to the second intermediate connection point.
5. The communication relay control device according to claim 4, wherein The second communication link has a second monitoring point, which is located between the second intermediate connection point and the fifth port; the monitoring circuit is connected to the second monitoring point to monitor the communication signal between the second intermediate connection point and the fifth port on the second communication link.
6. The communication transit control device according to any one of claims 1 to 5, characterized by The monitoring circuit includes a first monitoring circuit and a second monitoring circuit; the first monitoring circuit is connected to the first communication link and is used to monitor a first communication signal on the first communication link. The second monitoring circuit is connected to the second communication link and is used to monitor the second communication signal on the second communication link.
7. The communication transit control device according to any one of claims 1 to 5, characterized by The first data acquisition rod is a built-in enclosed data acquisition rod of the inverter, and the second data acquisition rod is a newly added data acquisition rod.
8. The communication relay control device according to claim 1, wherein The microcontroller is connected to the cloud to send monitored communication signals to the cloud and to receive cloud control commands.
9. The communication switching control device according to claim 1, characterized in that, The communication switching control device also includes an indicator light module, which is connected to the microcontroller and is used to indicate the status of the high-speed analog switch.
10. An energy storage system characterized by, It includes an inverter, a battery pack, a first data acquisition rod, a second data acquisition rod, and a communication switching control device as described in any one of claims 1-9.