General control module of energy storage system

Abstract

An energy storage system master control module belongs to the industrial and commercial energy storage field. The utility model aims to solve the problems that the existing master control module adopts independent external arrangement, the occupied space is increased, the communication interface of the master control module is single, external expansion is often needed, and the size control and the communication stability of the module are not facilitated. A first path of UART serial port of a master control CPU in the master control module communicates with an external master control module through a CAN communication circuit and is used for expanding the plurality of master control modules; a second path of UART serial port of the master control CPU in the master control module is communicated with the UPS through an RS232 communication circuit; iO ports led out by the master control CPU form a DO / DI communication circuit to communicate with a driving feedback device and obtain the operation state of the feedback device; and the third path to the fifth path of UART serial ports of the master control CPU in the master control module are respectively communicated with external control equipment through an RS485 communication circuit. The system controls a plurality of external devices.

Description

Technical Field

[0001] The utility model relates to an energy storage system, belonging to the field of industrial and commercial energy storage. Background Art

[0002] With the development of society and economic progress, industrial and commercial electricity consumption is increasing, while energy supply faces severe challenges. To solve this problem, energy storage technology has gradually been widely used in the industrial and commercial fields, and has achieved remarkable results.

[0003] The lithium battery energy storage system master control module is used to control and manage external devices, such as slave control units and UPS.

[0004] The existing energy storage system master control module has the following problems:

[0005] 1. Currently, most of the energy storage system master control modules use imported single-chip microcomputers as the main control, which are expensive and not domestically produced components.

[0006] 2. Currently, the main control modules of energy storage systems all use separate external settings, which increases space occupancy, is not conducive to communication stability, and increases component costs.

[0007] 3. Currently, the communication interface of the energy storage system's master control module is single, often requiring external expansion. This is detrimental to module size control and communication stability. As product iterations and upgrades increase, the number of external devices that need to be controlled increases, making it difficult to adapt to product development needs. Utility Model Content

[0008] The purpose of the utility model is to solve the problems that the existing main control modules all adopt separate external settings, which increase space occupancy and are not conducive to communication stability; the communication interface of the master control module is single and often requires external expansion, which is not conducive to module volume control and communication stability. A master control module for an energy storage system is proposed.

[0009] Energy storage system master control module, which includes a master control CPU, CAN communication circuit, RS485 communication circuit, RS232 communication circuit and DO / DI interface circuit;

[0010] The first UART serial port of the master control CPU communicates with the external master control module through the CAN communication circuit and is used for the expansion of multiple master control modules;

[0011] The second UART serial port of the master control CPU communicates with the UPS uninterruptible power supply through the RS232 communication circuit;

[0012] The first IO port of the master control CPU communicates with the drive feedback device through the DO / DI communication circuit and obtains the operating status of the feedback device;

[0013] The third to fifth UART serial ports of the master control CPU communicate with external control devices through one RS485 communication unit respectively.

[0014] Preferably, the module further includes a network interface circuit, a USB communication circuit and a MicroSD circuit;

[0015] The second IO port of the master control CPU communicates with the touch screen through the network interface circuit;

[0016] The third IO port of the master control CPU communicates with the USB device through the USB communication circuit;

[0017] The fourth IO port of the master control CPU communicates with the SD card through the MicroSD circuit.

[0018] Preferably, the module further includes a reset circuit, a power supply circuit, a watchdog circuit, a startup mode selection circuit and an RTC circuit;

[0019] The reset signal output terminal of the reset circuit is connected to the reset signal input terminal of the master control CPU;

[0020] The control signal output terminal of the watchdog circuit is connected to the control signal input terminal of the master control CPU;

[0021] The start signal output terminal of the start mode selection circuit is connected to the start signal input terminal of the master control CPU;

[0022] The clock signal output terminal of the RTC circuit is connected to the clock signal input terminal of the master control CPU.

[0023] Preferably, the sixth UART serial port of the master control CPU collects the real-time power of the transformer in real time through the RS485 communication circuit, and when the real-time power exceeds the preset power, controls the lithium battery pack control component to discharge to the load.

[0024] Preferably, the seventh UART serial port of the master control CPU collects the power generation of the photovoltaic array in real time through the RS485 communication circuit. When the power generation of the photovoltaic array is lower than the preset power generation, the lithium battery pack control component is controlled to discharge to the load.

[0025] Preferably, the external control device includes a smart meter, an air conditioner and a converter.

[0026] Preferably, the drive device includes relay drive feedback, fan drive feedback and operation / fault indication.

[0027] Preferably, the feedback devices include fire equipment feedback, water immersion feedback, access control feedback and emergency stop feedback.

[0028] Preferably, the module further comprises a main control unit;

[0029] The lithium battery group control component includes N battery packs;

[0030] Each battery pack contains N groups of lithium-ion batteries and one slave control module;

[0031] The master control CPU sends a request to the slave control module through the master control unit. After receiving the request, the slave control module collects information data of the corresponding N groups of lithium-ion batteries and transmits it to the master control CPU through the master control unit. The battery information data includes the temperature and voltage of a single lithium-ion battery. The master control CPU compares the information data of the N groups of lithium-ion batteries with the discharge data within the preset range. If the information data of the N groups of lithium-ion batteries are within the preset range, the lithium battery group is controlled to discharge to the load through the RS485 communication circuit, converter and high-voltage box in sequence.

[0032] The beneficial effects of the utility model are:

[0033] The master control CPU of this utility model adopts domestic main control chip. Compared with the use of imported single chip microcomputer, it reduces the cost and increases the localization rate of the device, which is conducive to the stability of device supply.

[0034] The energy storage system master control module designed in this utility model has a built-in master control CPU, CAN communication circuits, RS485 communication circuits, RS232 communication circuits, and DO / DI interface circuits. This eliminates the need for a main control unit peripheral, thereby improving device integration, reducing space usage and costs, shortening external communication cable lengths, and improving communication stability.

[0035] This energy storage system master control module integrates multiple interfaces, including CAN, RS485, RS232, and DO / DI interfaces. It can communicate with a variety of devices, including slave control modules, smart meters, air conditioners, converters, UPSs, relay drivers / feedback systems, firefighting equipment, flood control systems, and access control systems. This significantly reduces module size and improves communication stability, adapting to product upgrade requirements.

[0036] The utility model can also collect the real-time power of the transformer to control the lithium battery pack and reduce the transformer output so that the transformer power does not exceed the power requirement of the power consumption agreement, thereby reducing the user's electricity bills and electricity costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is the principle block diagram of the energy storage system master control module;

[0038] Figure 2 This is the structural diagram of the entire energy storage cabinet;

[0039] Figure 3 This is the circuit diagram of the CAN communication circuit;

[0040] Figure 4 This is the circuit diagram of the RS232 communication circuit;

[0041] Figure 5 This is the circuit diagram of the RS485 communication circuit. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0044] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0045] Specific implementation method 1: Combination Figure 1 、 Figure 3 、 Figure 4 and Figure 5 The energy storage system master control module described in this embodiment includes a master control CPU 1, a CAN communication circuit, an RS485 communication circuit, an RS232 communication circuit, and a DO / DI interface circuit.

[0046] The first UART serial port of the master control CPU1 communicates with the external master control module through the CAN communication circuit and is used for the expansion of multiple master control modules;

[0047] The second UART serial port of the master control CPU1 communicates with the UPS uninterruptible power supply through the RS232 communication circuit;

[0048] The first IO port of the master control CPU1 communicates with the drive feedback device through the DO / DI communication circuit and obtains the operating status of the feedback device;

[0049] The third to fifth UART serial ports of the master control CPU 1 communicate with external control devices through one RS485 communication unit respectively.

[0050] In this embodiment, if Figure 1As shown, the CAN communication circuit communicates with the external master control module and is used for expansion of multiple master control modules. The smart meter communicates with the RS485 communication circuit to obtain power consumption data. The air conditioner communicates and controls the RS485 communication circuit to obtain current temperature information and turn cooling and heating on or off. The inverter communicates and controls the RS485 communication circuit to obtain inverter status information and start and stop the inverter. The RS232 communication circuit communicates with the UPS uninterruptible power supply to obtain its status. The relay drive / feedback and fan drive feedback communicate and control the DO / DI interface circuit to obtain contactor status information and initiate the opening and closing of each switch. Firefighting equipment feedback, flooding feedback, access control feedback, emergency stop feedback, and operating fault indication are connected to the DO / DI interface circuit to obtain the operating status of each peripheral device.

[0051] The circuit diagram of CAN communication circuit is as follows Figure 3 As shown, the CAN communication circuit includes resistors R1-R11, capacitors C1-C8, crystal oscillator X4 and bidirectional voltage regulator diodes D1-D2;

[0052] The first UART serial port of the master control CPU is connected to one end of resistors R1-R5, the other end of resistor R1 is connected to pin 13 of the CAN controller model XL2515, the other end of resistor R2 is connected to pin 14 of the CAN controller model XL2515, the other end of resistor R3 is connected to pin 16 of the CAN controller model XL2515, the other end of resistor R4 is connected to pin 12 of the CAN controller model XL2515 and one end of resistor R6, the other end of resistor R5 is connected to pin 17 of the CAN controller model XL2515, one end of resistor R7 and one end of capacitor C5, and resistors R1 and R2 are connected to pin 13 of the CAN controller model XL2515, one end of resistor R2 and one end of capacitor C5. The other end of R6 and the other end of resistor R7 are connected to the 3V power supply, the other end of capacitor C5 is connected to the power ground, pin 18 of the CAN controller model XL2515 is connected to the 3V power supply and one end of capacitor C1 at the same time, the other end of capacitor C1 is connected to the power ground, pin 2 of the CAN controller model XL2515 is connected to one end of resistor R8, pin 1 of the CAN controller model XL2515 is connected to one end of resistor R9, pin 7 of the CAN controller model XL2515 is connected to one end of capacitor C4 and one end of crystal oscillator X4 at the same time, the other end of capacitor C4 is connected to one end of capacitor C3 and the power ground, capacitor C The other end of resistor R3 is connected to the other end of crystal oscillator X4 and pin 8 of CAN controller model XL2515. Pin 9 of CAN controller model XL2515 is connected to power ground. The other end of resistor R8 is connected to pin 2 of CAN transceiver model NSI1050-DDBR. The other end of resistor R9 is connected to pin 3 of CAN transceiver model NSI1050-DDBR. Pin 4 of CAN transceiver model NSI1050-DDBR is connected to power ground. Pin 8 of CAN transceiver model NSI1050-DDBR is connected to 5V power supply and one end of capacitor C6 at the same time. The other end of C6 is connected to the power supply; pin 7 of the NSI1050-DDBR CAN transceiver is connected to one end of resistor R10, one end of bidirectional voltage regulator diode D2, and one end of capacitor C8. Pin 6 of the NSI1050-DDBR CAN transceiver is connected to one end of resistor R11, one end of bidirectional voltage regulator diode D1, and one end of capacitor C7. The other ends of bidirectional voltage regulator diode D2 and capacitor C8 are both connected to power ground, the other ends of bidirectional voltage regulator diode D1 and capacitor C7 are both connected to power ground, and the other ends of resistor R10 and resistor R11 are both connected to the lithium battery pack control component. This circuit allows for external connection expansion.

[0053] The circuit diagram of RS232 communication circuit is as follows Figure 4 As shown, the circuit diagram of RS485 communication circuit is as follows Figure 5By designing the master control CPU1, CAN communication unit, RS485 communication unit, RS232 communication unit and DO / DI interface circuit, the connection to various external devices is realized and the stability of communication is improved.

[0054] Specific embodiment 2: This embodiment further defines the energy storage system master control module described in specific embodiment 1. In this embodiment, the module further includes a network interface circuit, a USB communication circuit, and a MicroSD circuit.

[0055] The second IO port of the master control CPU1 communicates with the touch screen through the network interface circuit;

[0056] The third IO port of the master control CPU1 communicates with the USB device via the USB communication circuit;

[0057] The fourth IO port of the master control CPU1 communicates with the SD card through the MicroSD circuit.

[0058] Specific embodiment three: This embodiment further limits the energy storage system master control module described in specific embodiment one. In this embodiment, the module further includes a reset circuit, a power supply circuit, a watchdog circuit, a startup mode selection circuit, and an RTC circuit;

[0059] The reset signal output terminal of the reset circuit is connected to the reset signal input terminal of the master control CPU1;

[0060] The control signal output terminal of the watchdog circuit is connected to the control signal input terminal of the master control CPU1;

[0061] The start signal output terminal of the start mode selection circuit is connected to the start signal input terminal of the master control CPU1;

[0062] The clock signal output terminal of the RTC circuit is connected to the clock signal input terminal of the master control module 1 .

[0063] In this embodiment, if Figure 1 As shown, the power supply circuit provides power for the master control unit, the reset circuit resets the master control unit, the watchdog circuit prevents the master control unit from running away or freezing, and the boot mode selection circuit selects the type of boot medium, which is in the SD card in the MicroSD circuit or the USB flash drive in the USB communication circuit. The RTC circuit is a real-time clock circuit with a button battery inside that provides the most basic clock power when the master control unit loses power.

[0064] Specific embodiment four: This embodiment further limits the energy storage system master control module described in specific embodiment one. In this embodiment, the sixth UART serial port of the master control CPU1 collects the real-time power of the transformer in real time through the RS485 communication circuit. When the real-time power exceeds the preset power, the lithium battery pack control component is controlled to discharge to the load.

[0065] In this embodiment, by monitoring the real-time power of the transformer, when the real-time power exceeds the power demand of the electricity consumption agreement, the energy storage management control module controls the lithium battery pack to discharge to the load, reducing the transformer output so that the transformer power does not exceed the power demand of the electricity consumption agreement, thereby reducing the user's electricity bill and electricity costs.

[0066] Specific embodiment five: This embodiment further limits the energy storage system master control module described in specific embodiment one. In this embodiment, the seventh UART serial port of the master control CPU1 collects the power generation of the photovoltaic power generation array in real time through the RS485 communication circuit. When the power generation of the photovoltaic power generation array is lower than the preset power generation, the lithium battery pack control component is controlled to discharge to the load.

[0067] In this embodiment, the electricity generated by the photovoltaic array is first stored in the lithium battery pack, and the excess electricity is used to power the load. When the electricity generated by the photovoltaic array is insufficient, the master control unit monitors the status of the photovoltaic array and controls the lithium battery pack to supply power to the load. The master control unit smoothes the power generation and power consumption, improves the utilization rate of the photovoltaic array, and maximizes the benefits of electricity consumption.

[0068] Specific embodiment 6: This embodiment further limits the energy storage system master control module described in specific embodiment 1. In this embodiment, the external control device includes a smart meter, an air conditioner, and a converter.

[0069] Specific embodiment seven: This embodiment further limits the energy storage system master control module described in specific embodiment one. In this embodiment, the drive device includes relay drive feedback, fan drive feedback and operation / fault indication.

[0070] Specific embodiment eight: This embodiment further limits the energy storage system master control module described in specific embodiment one. In this embodiment, the feedback devices include fire equipment feedback, water immersion feedback, access control feedback, and emergency stop feedback.

[0071] Specific implementation method nine: Combination Figure 1 This embodiment is described. This embodiment further defines the energy storage system master control module described in the first embodiment. In this embodiment, the module further includes a main control unit.

[0072] The lithium battery group control component includes N battery packs 3;

[0073] Each battery pack 3 is provided with N groups of lithium-ion batteries and 1 slave control module;

[0074] The master control CPU1 sends a request to the slave control module through the master control unit. After receiving the request, the slave control module collects information data of the corresponding N groups of lithium-ion batteries and transmits it to the master control CPU1 through the master control unit. The battery information data includes the temperature and voltage of a single lithium-ion battery. The master control CPU1 compares the information data of the N groups of lithium-ion batteries with the discharge data within the preset range. If the information data of the N groups of lithium-ion batteries are within the preset range, the lithium battery group is controlled to discharge to the load through the RS485 communication circuit, the converter and the high-voltage box 2 in sequence.

[0075] In this embodiment, if the information data of the N groups of lithium-ion batteries received by the master control CPU 1 is charging data within a preset range, the power grid is controlled to charge the N groups of lithium-ion batteries.

[0076] The equipment in the cabinet is connected to external equipment, so the energy storage system master control module has a high degree of integration and the communication method is easy to manage.

[0077] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. The energy storage system master control module is characterized by: The module comprises a master control CPU (1), a CAN communication circuit, an RS485 communication circuit, an RS232 communication circuit and a DO / DI interface circuit; The first UART serial port of the master control CPU (1) communicates with an external master control module via a CAN communication circuit, and is used for expansion of multiple master control modules; The second UART serial port of the master control CPU (1) communicates with the UPS uninterruptible power supply via an RS232 communication circuit; The first IO port of the master control CPU (1) communicates with the drive feedback device through a DO / DI communication circuit and obtains the operating status of the feedback device; The third to fifth UART serial ports of the master control CPU (1) communicate with the external control device via one RS485 communication unit respectively.

2. The energy storage system master control module according to claim 1, characterized in that: The module also includes a network interface circuit, a USB communication circuit and a MicroSD circuit; The second IO port of the master control CPU (1) communicates with the touch screen via a network interface circuit; The third IO port of the master control CPU (1) communicates with the USB device via the USB communication circuit; The fourth IO port of the master control CPU (1) communicates with the SD card via the MicroSD circuit.

3. The energy storage system master control module according to claim 1, characterized in that: The module also includes a reset circuit, a power supply circuit, a watchdog circuit, a start-up mode selection circuit and an RTC circuit; The reset signal output terminal of the reset circuit is connected to the reset signal input terminal of the master control CPU (1); The control signal output terminal of the watchdog circuit is connected to the control signal input terminal of the master control CPU (1); The start signal output terminal of the start mode selection circuit is connected to the start signal input terminal of the master control CPU (1); The clock signal output terminal of the RTC circuit is connected to the clock signal input terminal of the master control CPU (1).

4. The energy storage system master control module according to claim 1, characterized in that: The sixth UART serial port of the master control CPU (1) collects the real-time power of the transformer in real time through the RS485 communication circuit. When the real-time power exceeds the preset power, the lithium battery control component is controlled to discharge to the load.

5. The energy storage system master control module according to claim 1, characterized in that: The seventh UART serial port of the master control CPU (1) collects the power generation of the photovoltaic power generation array in real time through the RS485 communication circuit. When the power generation of the photovoltaic power generation array is lower than the preset power generation, the lithium battery group control component is controlled to discharge to the load.

6. The energy storage system master control module according to claim 1, characterized in that: External control devices include smart meters, air conditioners and inverters.

7. The energy storage system master control module according to claim 1, characterized in that: Drive equipment includes relay drive feedback, fan drive feedback and run / fault indication.

8. The energy storage system master control module according to claim 1, characterized in that: Feedback devices include fire equipment feedback, flood feedback, access control feedback and emergency stop feedback.

9. The energy storage system master control module according to claim 6, characterized in that: The module also includes a main control unit; The lithium battery group control component includes N battery packs (3); Each battery pack (3) is provided with N groups of lithium-ion batteries and one slave control module; The master control CPU (1) sends a request to the slave control module through the master control unit. After receiving the request, the slave control module collects information data of the corresponding N groups of lithium-ion batteries and transmits it to the master control CPU (1) through the master control unit. The battery information data includes the temperature and voltage of a single lithium-ion battery. The master control CPU (1) compares the information data of the N groups of lithium-ion batteries with discharge data within a preset range. If the information data of the N groups of lithium-ion batteries are discharge data within the preset range, the lithium battery group is controlled to discharge to the load through the RS485 communication circuit, the converter and the high-voltage box (2) in sequence.

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