Energy storage system communication architecture

Abstract

The utility model discloses a communication architecture of an energy storage system. The communication architecture of the energy storage system comprises a battery cluster and an energy storage converter, the plurality of battery clusters which are connected in parallel are respectively in communication connection with the PCS through a CAN (Controller Area Network) bus; a BMS unit and an energy management unit are integrated in the energy storage converter PCS; each battery cluster is formed by connecting a plurality of battery boxes and a high-voltage box in series, and a BMU of each battery box communicates with a BMS unit in the PCS through a CAN bus. Through the arrangement of the communication architecture of the energy storage system, the problems that the architecture among a plurality of systems or units in the existing traditional energy storage system is complicated, and the system is stopped due to the problems of communication delay, interference, communication data packet loss and the like in mutual communication are solved, and the integrated requirements of battery management and energy dispatching are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the energy storage technology field especially relates to a kind of energy storage system communication architecture. BACKGROUND

[0002] Energy storage system refers to the energy of the form such as electric energy is stored through different media, and is released when needed.The energy storage device composed of energy storage element and grid access device composed of power electronic device become two parts of energy storage system.Energy storage device realizes the storage, release or fast power exchange of energy.Grid access device realizes the energy two-way transmission and conversion between energy storage device and grid, realizes electric power peak shaving, energy optimization, improves power supply reliability and power system stability and other functions.

[0003] With the development of energy storage system, battery management system, energy storage converter and energy management system, the use of energy storage converter integrated with BMS and energy management is more and more common.The system structure is that Pack battery is connected in series to form a cabinet as battery cluster, and multiple battery clusters are connected in parallel on the DC side, and are connected into energy storage converter to convert into alternating current, and energy storage converter itself integrates BMS and energy management system, which is beneficial to product cost control and meets the integrated demand of battery management and energy scheduling.So the stability and reliability of the communication architecture of energy storage system using energy storage converter are particularly important. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of energy storage system communication architectures, and the technical problem of complex architecture between multiple systems in existing traditional energy storage system is solved by the utility model energy storage system communication architecture setting.

[0005] The utility model achieves the purpose by the following technical scheme:

[0006] A kind of energy storage system communication architecture, the energy storage system communication architecture includes: battery cluster and energy storage converter;Several parallel battery clusters are respectively connected by CAN bus and energy storage converter PCS communication;And BMS unit and energy management unit are integrated in the energy storage converter PCS;Each battery cluster is connected in series by several battery boxes and a high voltage box, and the BMU of each battery box is communicated with BMS unit in energy storage converter PCS by CAN bus.

[0007] According to one preferred embodiment, each battery cluster is connected in parallel by DC input and then connected to the DC side of energy storage converter PCS, and the AC side of energy storage converter PCS is connected with grid and load.

[0008] According to one preferred embodiment, the energy storage system communication architecture further comprises a temperature control system arranged in the energy storage system; the energy storage converter PCS and the temperature control system communicate through RS485 mode using ModBus RTU communication protocol.

[0009] According to one preferred embodiment, the energy storage system communication architecture further comprises several fire-fighting units and air conditioning units; the energy storage converter PCS and each fire-fighting unit and air conditioning unit communicate through RS485 mode using ModBus RTU communication protocol.

[0010] According to one preferred embodiment, the temperature control system, each fire-fighting unit and each air conditioning unit take power from the AC side of the energy storage converter PCS.

[0011] According to one preferred embodiment, the energy storage converter is connected with the temperature control system, each fire-fighting unit and each air conditioning unit through dry contact mode.

[0012] According to one preferred embodiment, the energy storage converter communicates with the local industrial computer through Ethernet using ModBus RTU communication protocol, for realizing real-time saving of data to the local.

[0013] According to one preferred embodiment, the local industrial computer completes data interaction with the cloud server by accessing external network cable or 4G wireless router.

[0014] The foregoing main scheme of the utility model and each further selected scheme thereof can be freely combined to form multiple schemes, all of which are the schemes that can be adopted and claimed by the utility model. Those skilled in the art can understand that there are multiple combinations according to the existing technology and common knowledge after understanding the scheme of the utility model, all of which are the technical schemes claimed by the utility model, and here, the exhaustive enumeration is not made.

[0015] The utility model has the beneficial effects that:

[0016] Through the energy storage system communication architecture arrangement of the utility model, the problems such as system shutdown caused by the problems such as communication delay, interference, communication data packet loss and the like existing in the communication between multiple systems or units in the existing traditional energy storage system are solved, the integrated demand of battery management and energy scheduling is met, and an integrated energy storage system scheme of the energy storage converter integrating battery management, energy scheduling and cloud platform data monitoring is provided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the energy storage system communication architecture schematic view of the utility model;

[0018] Figure 2 It is the main loop system structure diagram of the energy storage system of the utility model. DETAILED DESCRIPTION

[0019] The other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present application. The present application can also be implemented or applied through other different specific embodiments, and the details in the present application can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0020] It should be noted that similar reference numerals and letters refer to similar items throughout the accompanying drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and thus cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In addition, the utility model points out, if not particularly write the structure, the connection relation, the positional relation, the power source relation etc.

[0025] Embodiment 1

[0026] Reference Figure 1 As shown in the figure, the energy storage system communication architecture includes: battery cluster BMU and energy storage converter PCS.The energy storage system of the utility model is usually used in peak clipping or battery priority scene.

[0027] A plurality of parallel battery clusters are connected in communication with the energy storage converter PCS through CAN bus;And the BMS unit and energy management unit are integrated in the energy storage converter PCS.The battery cluster is composed of a plurality of battery boxes and a high-voltage box in series, and the BMU of each battery box is communicated with the BMS unit in the energy storage converter PCS through CAN bus.

[0028] The energy storage converter PCS processes the data collected and fed back by each BMU, and then distributes the current and power of each battery cluster according to the scheduling of the energy management unit.

[0029] Preferably, the energy storage converter PCS and the air conditioner (1-n), fire (1-n), temperature control system and other equipment are communicated through RS485 mode using ModBusRTU communication protocol, and the information is uploaded to the energy storage converter by modifying multiple device addresses or accessing multiple RS485 interfaces respectively to distinguish. The air conditioner (1-n), fire (1-n) corresponds to n battery clusters.

[0030] Further, the energy storage converter PCS and the air conditioner, fire, temperature control system and other equipment are connected through dry contact to upload equipment failure and alarm information at all levels.

[0031] Preferably, the energy storage converter PCS and the local industrial computer-upper computer are connected through Ethernet mode through data switch, using ModBusRTU communication protocol, and the data is uploaded to the local industrial computer-upper computer data real-time saving to local archive record.

[0032] Preferably, the local industrial computer-upper computer and the Web end upload data to the cloud server archive record by accessing the external network or accessing the 4G router, and provide the local and control functions of cloud access.

[0033] The utility model discloses a kind of energy storage system communication architecture settings, solve the complex architecture between multiple systems or units in existing traditional energy storage system, communication exists communication delay, interference, communication data packet loss etc.

[0034] Reference Figure 2 As shown in the figure, the main loop system structure diagram of an energy storage system is shown, and a plurality of battery boxes and a high voltage box are connected in series to form a battery cluster. The BMU in each battery box communicates with the BMS integrated in the energy storage converter PCS through the CAN bus, and different battery cluster main loops are connected in parallel to form a plurality of battery clusters.

[0035] A plurality of battery clusters are connected in parallel after direct current input and connected to the direct current side of the energy storage converter PCS. The alternating current side of the energy storage converter PCS can be connected to the power grid and the load, and the internal alternating current power supply is taken from the alternating current side of the energy storage converter PCS for power supply, i.e. the fire-fighting system, the temperature control system, the liquid cooling unit and each air conditioning unit are all powered by the alternating current side of the energy storage converter PCS.

[0036] The fire-fighting system mainly monitors the combustible gas, temperature, smoke and other information in the container to ensure the normal operation of the internal equipment; the temperature control system mainly monitors the temperature and humidity of the container to control the air conditioning unit and adjust the temperature and humidity in the system.

[0037] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An energy storage system communication architecture, comprising: The energy storage system communication architecture comprises: a battery cluster and an energy storage converter PCS; A plurality of parallel battery clusters are respectively connected in communication through a CAN bus and the energy storage converter PCS; and the energy storage converter PCS is integrated with a BMS unit and an energy management unit; Each battery cluster is composed of a plurality of battery boxes and a high-voltage box in series, and the BMU of each battery box communicates with the BMS unit in the energy storage converter PCS through a CAN bus.

2. The energy storage system communication architecture of claim 1, wherein, Each battery cluster is connected in parallel through a direct current input and then connected to the direct current side of the energy storage converter PCS, and the alternating current side of the energy storage converter PCS is connected with the power grid and the load.

3. The energy storage system communication architecture of claim 1, wherein, The energy storage system communication architecture further comprises a temperature control system arranged in the energy storage system; The energy storage converter PCS and the temperature control system communicate through RS485 using ModBusRTU communication protocol.

4. The energy storage system communication architecture of claim 3, wherein, The energy storage system communication architecture further comprises a plurality of fire-fighting units and air conditioning units; The energy storage converter PCS and each fire-fighting unit and air conditioning unit communicate through RS485 using ModBusRTU communication protocol.

5. The energy storage system communication architecture of claim 4, wherein, The temperature control system, each fire-fighting unit and each air conditioning unit take power from the alternating current side of the energy storage converter PCS.

6. The energy storage system communication architecture of claim 5, wherein, The energy storage converter is connected with the temperature control system, each fire-fighting unit and each air conditioning unit through dry contact.

7. The energy storage system communication architecture of claim 1, wherein, The energy storage converter communicates with the local industrial computer through Ethernet using ModBusRTU communication protocol, for realizing real-time data saving to the local.

8. The energy storage system communication architecture of claim 7, wherein, The local industrial computer completes data interaction with the cloud server by accessing external network or 4G wireless router.

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