Communication system for energy storage device

Abstract

The invention discloses a communication system for an energy storage device, and relates to the field of energy storage devices. The communication system for the energy storage device comprises a master control board and slave control boards, the slave control boards are used for detecting battery parameters, communication ISOA and ISOB of the multiple sets of slave control boards are connected end to end to form a garland shape, and the master control board is connected between the first set of slave control boards and the last set of slave control boards. According to the communication scheme of the communication system for the energy storage device, an ISOA / B communication mode is adopted, the ISOA / B communication mode is used for replacing a traditional CAN and 485 communication mode, communication is not affected even if a certain node in a loop is disconnected in the ISOA / B communication using process, the internal structures of all layers of the battery box are completely the same, the free replacement function of the battery box is conveniently achieved, the ISOA / B communication has the high fault-tolerant advantage, and the communication reliability is improved. All the battery boxes are designed to be identical, so that the operation is simple and convenient, time and labor are saved, the model pairing work is saved, and large-batch production and manufacturing are facilitated when disassembly maintenance or replacement maintenance is required for subsequent faults.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, specifically to a communication system for energy storage devices. Background Technology

[0002] With the rapid development of society and economy, photovoltaics has become one of the most common technologies in people's daily lives. Photovoltaics is short for solar photovoltaic power generation system, which is a new type of power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy. It has two modes: independent operation and grid-connected operation. At the same time, solar photovoltaic power generation systems are classified into two types: centralized, such as large-scale ground photovoltaic power generation systems in Northwest China; and distributed, such as photovoltaic power generation systems on the roofs of industrial and commercial enterprises and residential buildings. The use of integrated photovoltaic energy storage units is even more common. Integrated energy storage units contain multiple battery packs for energy storage.

[0003] For example, Chinese patent application CN115954918A provides a high-voltage energy storage inverter integrated system, relating to the field of photovoltaic energy storage technology. This system includes an energy storage inverter, an energy storage BMS, an energy management system (EMS), a battery pack, and a data acquisition module. The inverter's controller communicates with the BMS via a CAN interface. The data acquisition module acquires operating status data of the photovoltaic modules at the photovoltaic power station location, the inverter itself, and the battery pack within the inverter, i.e., monitors the charging and discharging of the battery pack. The BMS monitors the battery pack's voltage, current, and temperature in real time, while the EMS manages the battery's state of charge (SOC) and state of equilibrium (SOH). This system enables remote online intelligent monitoring, improving the stability of the energy storage inverter system and preventing safety degradation due to excessive current under low-voltage battery conditions.

[0004] Traditional energy storage integrated machines use CAN or 485 communication designs, which makes it difficult to freely combine and connect the internal battery packs. If one of the nodes is disconnected, communication is directly affected. Therefore, this traditional internal communication design of energy storage integrated machines cannot meet the requirements and lacks fault tolerance. In view of the shortcomings of the existing technology, this invention provides a communication system for energy storage devices to solve the above problems. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a communication system for energy storage devices. The communication scheme adopts ISOA / B communication mode, replacing the traditional CAN and 485 communication modes. During the use of ISOA / B communication, even if a node in the loop is disconnected, the communication will not be affected. The internal structure of each layer of the battery box is exactly the same, which facilitates the free replacement of the battery box. ISOA / B communication has a high fault tolerance advantage.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a communication system for an energy storage device, comprising a main control board and slave control boards, wherein the slave control boards are used to detect battery parameters, and the communication ISOA and ISOB of multiple sets of slave control boards are connected end to end to form a wreath shape, and the main control board is connected between the first set of slave control boards and the last set of slave control boards.

[0009] Preferably, one set of slave control boards manages one set of battery boxes. After multiple sets of battery boxes are freely combined, the garland communication is still satisfied. The multiple sets of slave control boards are connected end to end and use ISOA / B for garland communication connection design, so they have high fault tolerance advantages. Even if one set of nodes is disconnected, the entire communication is not affected.

[0010] Preferably, the battery boxes are designed to be identical, which facilitates manufacturing. Designing all battery boxes to be identical makes the operation simple and convenient, saving time and effort, reducing model matching work, and facilitating mass production when disassembly, maintenance, or replacement is required in the event of a subsequent fault.

[0011] Preferably, the battery box needs to work with the base, and the internal structure of each layer of the battery box is exactly the same to realize the function of freely replacing the battery box. The battery box structure design makes subsequent inspection and maintenance convenient.

[0012] Preferably, the battery box uses connectors for connecting the layers, thereby ensuring stable connections between the layers of the battery box and a stable overall structure of the battery box.

[0013] Preferably, the final battery box provides power supply "+-" and communication "ISOA / B" to the high-voltage box as a whole. The special electrical design realizes the garland communication. Even after the battery boxes are freely combined, the garland communication is still satisfied.

[0014] Preferably, the battery box has a free combination series connection function.

[0015] Preferably, the battery box is configured with at least 2 sets of 200V batteries and at most 4 sets of 400V batteries.

[0016] Preferably, the communication scheme adopts ISOA / B communication mode, which replaces the traditional CAN and 485 communication modes. Even if a node in the loop is disconnected during the use of ISOA / B communication, the communication will not be affected.

[0017] This invention discloses a communication system for energy storage devices, which has the following beneficial effects:

[0018] 1. This is a communication system for energy storage devices. The communication scheme adopts ISOA / B communication mode, which replaces the traditional CAN and 485 communication modes. During the use of ISOA / B communication, even if a node in the loop is disconnected, the communication will not be affected. The internal structure of each layer of the battery box is exactly the same, which facilitates the free replacement of the battery box. ISOA / B communication has a high fault tolerance advantage.

[0019] 2. This communication system for energy storage devices designs all battery boxes to be identical, so when subsequent faults require disassembly, maintenance, or replacement, the operation is simple and convenient, saving time and effort, reducing model matching work, and facilitating mass production. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the wreath communication design process of the present invention;

[0022] Figure 2 This is a schematic diagram illustrating the basic communication process principle of the present invention;

[0023] Figure 3 This is a schematic diagram of the electrical design of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This application provides a communication system for energy storage devices, solving the problems of traditional integrated energy storage devices where the internal battery packs, designed using CAN or 485 communication, are not easily combinable and connected in series. Furthermore, if one node in a group of nodes is disconnected, communication is directly affected. Therefore, this traditional internal communication design of integrated energy storage devices cannot meet the requirements and lacks fault tolerance. This invention provides a communication system for energy storage devices using ISOA / B communication, replacing the traditional CAN and 485 communication methods. During ISOA / B communication, even if a node in the loop is disconnected, communication is not affected. The internal structure of each layer of the battery box is completely identical, facilitating the free replacement of battery boxes. ISOA / B communication also offers high fault tolerance.

[0026] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0027] This invention discloses a communication system for energy storage devices, according to the appendix. Figure 1-3 As shown, it consists of a main control board and slave control boards. The slave control boards are used to detect battery parameters. The communication ISOA and ISOB of multiple slave control boards are connected end to end to form a wreath shape. The main control board is connected between the first set of slave control boards and the last set of slave control boards.

[0028] Furthermore, each set of control boards manages one set of battery boxes. Even after multiple sets of battery boxes are freely combined, the garland communication is still satisfied. Multiple sets of control boards are connected end to end and use ISOA / B for garland communication connection design, thus having a high fault tolerance advantage. Even if one set of nodes is disconnected, the entire communication is not affected.

[0029] It is specifically disclosed that the battery boxes are designed to be identical, which facilitates manufacturing. By designing all battery boxes to be identical, the operation is simple and convenient, saving time and effort, reducing model matching work, and also facilitating mass production.

[0030] Furthermore, the battery box needs to work with the base. The internal structure of each layer of the battery box is exactly the same, which is used to realize the function of freely replacing the battery box. The structural design of the battery box makes subsequent inspection and maintenance convenient.

[0031] Furthermore, the battery box uses connectors to connect the layers, thereby ensuring stable connections between the layers and overall structural stability of the battery box.

[0032] Furthermore, the final battery box provides power supply "+-" and communication "ISOA / B" to the high-voltage box as a whole. The special electrical design enables garland communication, and the battery boxes can be freely combined to still meet the garland communication requirements.

[0033] Specifically, the battery box has the function of free combination and series connection.

[0034] Specifically, the minimum number of battery boxes should be 2 sets of 200V, and the maximum number of battery boxes should be 4 sets of 400V.

[0035] Furthermore, the communication scheme adopts the ISOA / B communication method, replacing the traditional CAN and 485 communication methods. Even if a node in the loop is disconnected during the use of ISOA / B communication, the communication will not be affected.

[0036] The communication system used in this energy storage device has a unique integrated communication solution, choosing to use ISOA / B communication instead of the more common CAN or 485 communication:

[0037] a) ISOA / B communication has a high fault tolerance advantage; even if a node in the loop is disconnected, communication will not be affected.

[0038] b) If CAN or 485 communication is used, no wreath design is needed; the upper and lower layers of battery communication can be directly connected.

[0039] The energy storage unit needs to allow the battery boxes to be freely combined and connected in series, and it is desirable that the configurations of the battery boxes are exactly the same, so the internal communication requires a special design.

[0040] The principle is to use a main control board connected in series with multiple slave control boards, and the multiple slave control boards are interconnected as follows: Figure 2 As shown, the front and rear are connected to form a ring. From control board 1 to control board n, signals are received using ISOA and signals are emitted using ISOB.

[0041] In summary, the communication system for this energy storage device adopts the ISOA / B communication method, replacing the traditional CAN and 485 communication methods. During the use of ISOA / B communication, even if a node in the loop is disconnected, the communication will not be affected. The internal structure of each layer of the battery box is exactly the same, which facilitates the free replacement of the battery box. ISOA / B communication has a high fault tolerance advantage.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A communication system for an energy storage device, comprising a main control board and a slave control board, characterized in that: The slave control board is used to detect battery parameters. The communication ISOA and ISOB of multiple sets of slave control boards are connected end to end to form a wreath shape. The master control board is connected between the first set of slave control boards and the last set of slave control boards.

2. The communication system for an energy storage device according to claim 1, characterized in that: One set of control boards manages one set of battery boxes, and multiple sets of battery boxes can be freely combined, still satisfying the garland communication requirement.

3. A communication system for an energy storage device according to claim 2, characterized in that: The battery boxes are designed identically, which facilitates manufacturing.

4. A communication system for an energy storage device according to claim 2, characterized in that: The battery box works in conjunction with the base, and the internal structure of each layer of the battery box is exactly the same, which is used to realize the function of freely replacing the battery box.

5. A communication system for an energy storage device according to claim 2, characterized in that: The battery box uses connectors for connecting the layers.

6. A communication system for an energy storage device according to claim 2, characterized in that: The final battery box provides power "+-" and communication "ISOA / B" to the high-voltage box as a whole.

7. A communication system for an energy storage device according to claim 1, characterized in that: The battery box has the function of free combination and series connection.

8. A communication system for an energy storage device according to claim 7, characterized in that: The battery box is configured with a minimum of 2 sets of 200V and a maximum of 4 sets of 400V battery boxes.

9. A communication system for an energy storage device according to claim 1, characterized in that: The communication scheme adopts ISOA / B communication mode, which replaces the traditional CAN and 485 communication modes. Even if a node in the loop is disconnected during the use of ISOA / B communication, the communication will not be affected.

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