CN-122025865-A - Energy storage system and energy storage device

CN122025865ACN 122025865 ACN122025865 ACN 122025865ACN-122025865-A

Abstract

The application discloses an energy storage system and energy storage equipment, which belong to the technical field of energy storage batteries and comprise a battery system controller used for sending control data, wherein the battery system controller is connected with a plurality of battery cluster management units through a bus to form a first EtherCAT network, the battery cluster management units acquire the control data through the first EtherCAT network, the battery system controller is connected with a plurality of power conversion systems through the bus to form a second EtherCAT network, and each power conversion system is configured to acquire the control data through the second EtherCAT network so as to convert electric energy of a battery cluster. According to the energy storage system provided by the application, the communication buses among the battery system controller, the battery cluster management unit and the power conversion system are unified, and a switch is not required to be configured among the battery system controller, the battery cluster management unit and the power conversion system, so that the maintenance cost is reduced, and the development difficulty is reduced.

Inventors

WEN LIANG
FAN ZHIJIE
LI HUADONG
CAO XIAOHUI

Assignees

阳光电源股份有限公司

Dates

Publication Date: 20260512
Application Date: 20241101

Claims (10)

1. An energy storage system, comprising: a battery system controller configured to transmit control data; the battery cluster management units are in communication connection with the battery system controller through an EtherCAT bus to form a first EtherCAT network, and each battery cluster management unit is configured to acquire the control data through the first EtherCAT network so as to synchronously control the battery clusters; The power conversion systems are in communication connection with the battery system controller through EtherCAT buses to form a second EtherCAT network, and each power conversion system is configured to acquire the control data through the second EtherCAT network so as to convert electric energy of the battery cluster.
2. The energy storage system of claim 1, wherein the battery system controller has a first portal and a second portal; The battery cluster management unit is provided with a first port and a second port, the first port of a first battery cluster management unit in the plurality of battery cluster management units is connected with the first network port through the EtherCAT bus, and the first port and the second port of any two adjacent battery cluster management units are connected through the EtherCAT bus; the power conversion system is provided with a first interface and a second interface, the second interface of a first power conversion system in the power conversion systems is connected with the second network port through the EtherCAT bus, and the first interface and the second interface of two adjacent power conversion systems are connected through the EtherCAT bus.
3. The energy storage system of claim 2, wherein the control data comprises first data and second data, the first portal configured to transmit the first data, the first data being sequentially transmitted by each of the battery cluster management units and returned to the first portal; the second network port is configured to send the second data, and the second data is turned back to the second network port after being sequentially transmitted by each power conversion system.
4. The energy storage system of claim 1, wherein the battery system controller has a first portal and a second portal; The battery cluster management unit is provided with a first port and a second port, the first port of a first battery cluster management unit in the plurality of battery cluster management units is connected with the first network port through the EtherCAT bus, and the first port and the second port of any two adjacent battery cluster management units are connected through the EtherCAT bus; The power conversion system is provided with a first interface and a second interface, the second interface of a first power conversion system in the power conversion systems is connected with the second network port through the EtherCAT bus, and the first interface and the second interface of any two adjacent power conversion systems are connected through the EtherCAT bus; The second port of the last battery cluster management unit in the plurality of battery cluster management units is connected with the first interface of the last power conversion system in the plurality of power conversion systems, so that the first EtherCAT network and the second EtherCAT network form a ring network structure.
5. The energy storage system of claim 4, wherein the control data comprises first data and second data, the first portal configured to transmit the first data, the first data received by the second portal after being transmitted forward through each of the battery cluster management units and each of the power conversion systems; The second network port is configured to send the second data, the second data is received by the first network port after being reversely transmitted by each power conversion system and each battery cluster management unit, and the first data and the second data are backup data.
6. The energy storage system of claim 5, wherein the first data comprises a first counter and the second data comprises a second counter; The first counter is configured to increment 1 when the first data is input to the first port or the second interface, and remains unchanged when the second port or the first interface is input; The second counter is configured to increment 1 when the second data is input to the second port or the first interface, and remains unchanged when the second data is input to the first port or the second interface; The extremum of the first counter and the second counter is 2 16 -1.
7. The energy storage system of claim 2 or 4, wherein the battery cluster management unit has a first storage unit configured to store a first information delay that characterizes a difference in data-out time of the battery system controller and data-in time of the battery cluster management unit; The first information delay is configured to delay a corresponding time to output pulse signals after the battery cluster management unit receives data, so that all the pulse signals output by the battery cluster management unit are synchronized; The power conversion system has a second storage unit configured to store a second information delay that characterizes a difference between a data issue time of the battery system controller and a data receive time of the power conversion system; the second information delay is configured to delay outputting pulse signals at corresponding times after the power conversion system receives data, so that all the pulse signals output by the power conversion system are synchronized.
8. The energy storage system of claim 7, wherein the battery system controller comprises a first control unit, the first control unit being connected to the first portal and the second portal; Each battery cluster management unit comprises a second control unit, and the second control unit is connected with the first port and the second port; each power conversion system comprises a third control unit, wherein the third control unit is connected with the first interface and the second interface; the first control unit is configured to send upgrade data to the second control unit and/or the third control unit through the first internet access and the EtherCAT bus so as to upgrade firmware of the second control unit and/or the third control unit.
9. The energy storage system of claim 8, wherein the first storage unit is connected to the second control unit, the first control unit further configured to send an update instruction to the second control unit, the update instruction configured to update a storage category in the first storage unit; the second storage unit is connected with the third control unit, and the first control unit is further configured to send an update instruction to the third control unit, wherein the update instruction is configured to update the storage category in the second storage unit.
10. An energy storage device comprising the energy storage system of any of claims 1-9.

Description

Energy storage system and energy storage device Technical Field The embodiment of the application relates to the technical field of energy storage batteries, in particular to an energy storage system and energy storage equipment. Background In the existing communication topology structure of the energy storage battery management system, a battery system controller (Battery System Controller, english abbreviation BSC) communicates with a downlink device battery cluster management unit (Battery Cluster Management Unit, english abbreviation CMU) by using a CAN (Controller Area Network ) bus, communicates with a power conversion system (Power Conversion System, english abbreviation PCS) by using an ethernet, the communication bus is not uniform, and complicated IP management configuration is required by using the conventional ethernet, and network devices such as a switch are required to be configured on hardware, so that difficulty in maintenance and development is increased. Disclosure of Invention The embodiment of the application aims to provide an energy storage system and energy storage equipment, which are used for solving the technical problems that communication buses among the equipment in the energy storage system are not uniform, a switch is required to be configured for connection, and the maintenance and development difficulties are high in the prior art. In order to solve the technical problems, the embodiment of the application discloses the following technical scheme: in a first aspect, a battery system controller is provided, the battery system controller configured to transmit control data; the battery cluster management units are in communication connection with the battery system controller through an EtherCAT bus to form a first EtherCAT network, and each battery cluster management unit is configured to acquire the control data through the first EtherCAT network so as to synchronously control the battery clusters; The power conversion systems are in communication connection with the battery system controller through EtherCAT buses to form a second EtherCAT network, and each power conversion system is configured to acquire the control data through the second EtherCAT network so as to convert electric energy of the battery cluster. With reference to the first aspect, the battery system controller has a first network port and a second network port; The battery cluster management unit is provided with a first port and a second port, the first port of a first battery cluster management unit in the plurality of battery cluster management units is connected with the first network port through the EtherCAT bus, and the first port and the second port of any two adjacent battery cluster management units are connected through the EtherCAT bus; the power conversion system is provided with a first interface and a second interface, the second interface of a first power conversion system in the power conversion systems is connected with the second network port through the EtherCAT bus, and the first interface and the second interface of two adjacent power conversion systems are connected through the EtherCAT bus. In combination with the first aspect, the control data includes first data and second data, the first network port is configured to send the first data, and the first data is turned back to the first network port after being sequentially transmitted by each of the battery cluster management units; the second network port is configured to send the second data, and the second data is turned back to the second network port after being sequentially transmitted by each power conversion system. With reference to the first aspect, the battery system controller has a first network port and a second network port; The battery cluster management unit is provided with a first port and a second port, the first port of a first battery cluster management unit in the plurality of battery cluster management units is connected with the first network port through the EtherCAT bus, and the first port and the second port of any two adjacent battery cluster management units are connected through the EtherCAT bus; The power conversion system is provided with a first interface and a second interface, the second interface of a first power conversion system in the power conversion systems is connected with the second network port through the EtherCAT bus, and the first interface and the second interface of any two adjacent power conversion systems are connected through the EtherCAT bus; The second port of the last battery cluster management unit in the plurality of battery cluster management units is connected with the first interface of the last power conversion system in the plurality of power conversion systems, so that the first EtherCAT network and the second EtherCAT network form a ring network structure. With reference to the first aspect, the control data includes first data and second data, the first network por