Energy storage power distribution control device and energy storage system

Abstract

The utility model discloses an energy storage power distribution control device and an energy storage system. Comprising a mainframe box body and a functional unit located in the mainframe box body. The functional unit comprises a main controller, an inverter and a battery management unit; an external power supply is connected with the energy storage battery through the inverter; the battery management unit is respectively connected with the energy storage battery and the inverter; the main controller provides a plurality of control signal ends and a plurality of communication signal ends; the control signal end is used for connecting an external load with the main controller; and the communication signal end is used for the communication connection of the inverter and the battery management unit with the main controller. According to the technical scheme provided by the utility model, the layout of external signals is reduced, so that system integration is realized, connecting lines are reduced, and the system layout is simplified.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of electrical control technology, and in particular to an energy storage and power distribution control device and an energy storage system. Background Art

[0002] Energy storage systems usually include energy storage units such as battery clusters, inverters, air conditioners, high-voltage boxes, fire protection systems, and AC power distribution systems. Each system has power connections, communication connections, control and feedback signal connections, etc. There are many connection lines, which leads to a complex system layout. The integration of each system occupies a large space, resulting in a large control cabinet, which is not conducive to production and manufacturing. In addition, too many line connections will also increase the risk of system failure. Utility Model Content

[0003] The utility model provides an energy storage power distribution control device and an energy storage system, which reduce the layout of external signals, thereby realizing system integration, reducing connection lines and simplifying system layout.

[0004] In a first aspect, an embodiment of the utility model provides an energy storage and power distribution control device, comprising: a main housing and a functional unit located in the main housing; the functional unit comprises a main controller, an inverter and a battery management unit;

[0005] The external power supply is connected to the energy storage battery through the inverter; the battery management unit is connected to the energy storage battery and the inverter respectively; the main controller provides multiple control signal terminals and multiple communication signal terminals; the control signal terminal is used for the external load to connect to the main controller; the communication signal terminal is used for the inverter and the battery management unit to communicate with the main controller.

[0006] Optionally, the main controller is provided with a DC switching power supply, which is electrically connected to the energy storage battery; the DC switching power supply is used to provide internal power supply.

[0007] Optionally, the functional unit also includes a first detection unit, which is arranged between the inverter and the energy storage battery, and is communicatively connected to the main controller; the first detection unit is used to detect electrical parameters input or output by the energy storage battery.

[0008] Optionally, the communication signal terminal includes a LAN communication terminal, a 2.4G / 4G antenna terminal, an RS485 communication terminal and a CAN communication terminal.

[0009] Optionally, the energy storage and distribution control device further includes a switch unit, which is arranged in the line between the external power supply and the inverter, and the switch unit is used to jump to an open circuit state when the voltage between the external power supply and the inverter is greater than a threshold.

[0010] Optionally, the switch unit is a shunt release.

[0011] Optionally, the energy storage and power distribution control device further includes a lightning protection unit, and the lightning protection unit is connected in parallel to one side of the output of the switch unit.

[0012] Optionally, the energy storage and power distribution control device further includes a metering meter; the input end of the metering meter is connected to the line between the external power supply and the inverter, and the metering meter is used to measure the electrical parameters of the input or output of the external power supply.

[0013] In a second aspect, an embodiment of the utility model provides an energy storage system, including the energy storage and power distribution control device described in any embodiment of the utility model.

[0014] The technical solution provided by the embodiment of the utility model integrates the inverter, the battery management unit and the control host into one, and provides communication connection and control connection between the inverter, the battery management unit and the external load through the control host, thereby eliminating some repeated primary electrical circuit designs in the design, centralizing and emitting the system layout by the control host, reducing the layout of external signals, thereby realizing system integration, reducing connection lines and simplifying the system layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of line connections between various systems in the related technology;

[0016] Figure 2 A schematic diagram of the structure of an energy storage and power distribution control device is provided for an embodiment of the utility model;

[0017] Figure 3 A schematic diagram of a control signal terminal of a main controller is provided for an embodiment of the utility model;

[0018] Figure 4 A schematic diagram of a communication signal terminal of a main controller is provided for an embodiment of the utility model;

[0019] Figure 5 A structural schematic diagram of another energy storage and power distribution control device is provided for an embodiment of the utility model;

[0020] Figure 6 A structural schematic diagram of a high-voltage AC circuit is provided for an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The energy storage system usually includes energy storage units such as battery clusters, inverter 2, air conditioner 3, fire protection system 4 and AC power distribution system. The air conditioner 3 is used to cool the energy storage unit and inverter 2, and the fire protection system 4 is used to implement fire protection for the energy storage unit and inverter 2. Figure 1 This is a schematic diagram of the line connection between various systems in the related technology, see Figure 1 The systems are connected with each other through power supply (solid line), communication, control and feedback signal (dashed line), etc. There are many connection lines, which leads to complex system layout. The integration of each system occupies a large space, resulting in a large control cabinet, which is not conducive to production and manufacturing. In addition, too many line connections will also increase the risk of system failure.

[0023] In view of this, Figure 2 A schematic diagram of the structure of an energy storage and distribution control device is provided for the embodiment of the utility model. Figure 2 , comprising: a main box 20 and a functional unit located in the main box 20; the functional unit comprises a main controller 21, an inverter 2 and a battery management unit 22;

[0024] The external power supply is connected to the energy storage battery 23 through the inverter 2; the battery management unit 22 is connected to the energy storage battery 23 and the inverter 2 respectively; the main controller 21 provides multiple control signal terminals and multiple communication signal terminals; the control signal terminal is used for connecting the external load to the main controller 21; the communication signal terminal is used for the inverter 2 and the battery management unit 22 to communicate with the main controller 21.

[0025] Specifically, the main housing 20 is used to carry and protect the internal functional units, and the functional units are integrated in the main housing 20. The functional units include a main controller 21, an inverter 2, and a battery management unit 22 (Battery Management System, BMS). The external power supply 24 is connected to one end of the inverter 2, and the other end of the inverter 2 is connected to the energy storage battery 23. The AC power provided by the external power supply 24 can be converted into DC power by the inverter 2 to charge the energy storage battery 23, and the DC power provided by the energy storage battery 23 can also be converted into AC power by the inverter 2 to discharge to the external power supply 24. The output end of the inverter 2 is connected to the battery management unit 22, so that the power provided by the external power supply 24 is used to power the battery management unit 22. The battery management unit 22 is connected to the energy storage battery 23, and the battery management unit 22 is used to detect the electrical parameters of the energy storage battery 23, such as the current, voltage and other parameters of each energy storage battery 23.

[0026] Figure 3 A schematic diagram of a control signal terminal of a main controller is provided for an embodiment of the utility model, see Figure 3 The main controller 21 is provided with a plurality of control signal terminals 212, which are used to output control signals to external loads or receive feedback signals input by external loads, wherein the external loads may include fans and fire protection systems, etc. A plug-in node may be provided on one side surface of the control signal terminal 212 of the main controller for plugging in a signal cable or a circuit board.

[0027] The control signal terminal 212 realizes the input and output point control of the main controller 21 to the external load, for example, the output node realizes the control of the inverter cooling fan, the hydrogen exhaust fan, the fire cylinder solenoid valve, and the inverter emergency stop control. The input node realizes the fire emergency stop, the electrical emergency stop input, the fire spray feedback, the access control feedback, the flooding feedback, the AC input surge feedback, the operation indicator light, the alarm indicator light, the fault indicator light, etc. Among them, the reserved control signal terminal 212 can be used to expand more external control applications. Figure 4 A schematic diagram of a communication signal terminal of a main controller is provided for an embodiment of the utility model, see Figure 4, the main controller 21 is provided with a plurality of communication signal terminals 30, exemplarily, the communication signal terminals 30 include a LAN communication terminal 31, a 2.4G / 4G antenna terminal 32 and an RS485 communication terminal 33, so that a plurality of communication modes can be provided to meet the communication requirements of the main controller 21 with external loads and internal units, wherein the LAN communication terminal 31 can be used to access an external switch, the RS485 communication terminal 33 can be used for communication connection of devices such as the inverter 2, the metering meter 41, the air conditioner 42, and the detector 43, and the 2.4G / 4G antenna can be used to upload communication data and parameters related to the energy storage battery 23 to the cloud platform. For example, the parameters of the energy storage battery 23 detected by the battery management unit 22 can be transmitted to the main controller 21 using the corresponding communication signal terminal 30, and the main controller 21 sends it to the control unit of the upper-level battery pack, thereby realizing the communication between the battery management unit 22 and the upper-level control unit of the energy storage battery 23, and then realizing the control, protection, communication and data recording functions of the entire battery cluster. The working status data of the inverter 2, the meter 41, the air conditioner 42, the detector 43, the fan and the fire protection system can also be transmitted to the main controller 21 by using the communication signal terminal 30. The main controller 21 outputs the feedback signal according to the working status data, thereby realizing the feedback output of the status of each device. A terminal pair plug point 35 can be set on one side surface of the communication signal terminal 30 of the main controller for plugging in the signal cable or circuit board. Exemplarily, the main controller 21 can use a MOZI-100 processor.

[0028] The technical solution provided by the embodiment of the utility model integrates the inverter, the battery management unit and the control host into one, and provides communication connection and control connection between the inverter, the battery management unit and the external load through the control host, thereby eliminating some repeated primary electrical circuit designs in the design, centralizing and emitting the system layout by the control host, reducing the layout of external signals, thereby realizing system integration, reducing connection lines and simplifying the system layout.

[0029] In some embodiments, the main controller 21 is provided with a DC switching power supply 34, which is electrically connected to the energy storage battery 23; the battery management unit 22 is also connected to the DC switching power supply 34, which is used to provide internal power supply.

[0030] Specifically, the main controller 21 has a built-in DC switching power supply 34, and the main controller 21 can perform energy management on the entire energy storage and distribution control device. For example, the main controller 21 can have a built-in 90W, 24V DC switching power supply 34, and the DC switching power supply 34 is connected to the energy storage battery 23, so as to realize the uninterruptible power supply output function. Exemplarily, the DC switching power supply 34 can be divided into 2 outputs, 1 for the isolated power supply path, and 1 for the non-isolated power supply path, so as to power the main controller 21 itself, the battery management unit 22 and the external load without adding an external switching power supply. Exemplarily, the DC switching power supply 34 can provide power for the fan, the battery management unit 22 and some external detection equipment (such as temperature sensors and liquid sensors, etc.).

[0031] In some embodiments, Figure 5 A schematic diagram of the structure of another energy storage and distribution control device is provided for the embodiment of the utility model, see Figure 5 The functional unit further includes a first detection unit 51, which is arranged between the inverter 2 and the energy storage battery 23, and is in communication connection with the main controller 21; the first detection unit 51 is used to detect the electrical parameters input or output between the inverter 2 and the energy storage battery 23. The data detected by the first detection unit 51 can be transmitted to the main controller 21, and the main controller 21 can monitor and collect the data status of the energy storage battery 23.

[0032] In some embodiments, Figure 6 A schematic diagram of a high voltage AC circuit is provided for the present invention. Figure 6 A switch unit 62 can also be set in the circuit between the external power supply 24 and the inverter 2. The external power supply 24 provided by the AC primary circuit can enter the energy storage distribution control device through the quick-plug terminal. The normal access power indicator 61 lights up. The switch unit 62 is set on one side of the AC circuit. When the voltage between the external power supply 24 and the inverter 2 is greater than the threshold, it jumps to the disconnected state, thereby playing a protective role. The external power supply 24 can be connected and disconnected by the switch unit 62. Among them, the switch unit 62 can be connected to the main controller 21 to realize the connection and disconnection function of the switch unit 62 through the control signal of the main controller 21. Exemplarily, the switch unit 62 can use a shunt release. The shunt release is a circuit breaker that is remotely controlled to open the switch. When the power supply voltage is a preset voltage, the circuit breaker is disconnected. When the circuit breaker is closed again, the micro switch returns to the closed position.

[0033] Continue to see Figure 6In some embodiments, a lightning protection unit 63 is connected in parallel to one side of the output end of the switch unit. The lightning protection unit 63 is generally composed of a plurality of varistors and a discharge tube. When the AC input circuit is struck by lightning, an instantaneous high voltage will be generated at the AC input end. At this time, the resistance of the varistor will instantly decrease, and the discharge tube will be short-circuited instantly. In this way, at the moment of lightning strike, the AC circuit is connected to the ground, and the strong voltage and current are unloaded, which effectively protects the equipment.

[0034] Continue to see Figure 6 In some embodiments, the energy storage power distribution control device further includes a metering meter 41; the input end of the metering meter 41 is connected to the line between the external power source 24 and the inverter 2, and the metering meter 41 is used to measure the electrical parameters input between the external power source 24 and the inverter 2 of the high-voltage AC circuit. Specifically, the metering meter 41 is set on the AC circuit between the external power source 24 and the inverter 2, and the electric energy data on the AC circuit can be collected in real time.

[0035] The external power supply 24 enters the energy storage distribution control device through the quick-plug terminal, and is connected and disconnected with the external power supply 24 through the switch unit 62. The meter 41 is set on the AC circuit to realize the collection of electric energy data. The energy storage battery 23 is directly connected to the inverter 2 on the DC high-voltage circuit. The battery management unit 22 collects the voltage, current and other parameters of the energy storage battery 23, and communicates with the upper-level battery pack through the main controller 21 to realize the control, protection, communication and data recording functions of the battery pack. The main controller 21 provides multiple control signal terminals 212 and multiple communication signal terminals 30. The control signal terminal 212 realizes the input and output point control of the main controller 21 on the external load. For example, the output potential realizes the control of the inverter cooling fan, the hydrogen exhaust fan, the fire cylinder solenoid valve, the inverter emergency stop control, and the switch unit control. The input node realizes fire emergency stop, electrical emergency stop input, fire sprinkler feedback, access control feedback, water immersion feedback, AC input surge feedback, operation indicator light, alarm indicator light, fault indicator light, etc., thereby realizing protection control and fire control on the high-voltage AC circuit side, and realizing the operation of the charge and discharge control strategy. In addition, the relevant data can be transmitted to the cloud platform through 4G communication to facilitate remote information acquisition.

[0036] By integrating the switch unit 61, battery management unit 22, metering meter 41, DC switching power supply 34 inverter 2 and main controller 21 into the energy storage distribution control device, the functions realized by the high-voltage box and distribution box in the original system are integrated, and the repeated primary electrical circuit design is eliminated in the design, thereby reducing space occupancy and reducing external signals of the system, thereby realizing system integration and simplifying the system layout.

[0037] The embodiment of the utility model also provides an energy storage system, which is an energy storage system that can store chemical energy, potential energy, kinetic energy, etc. in the form of electrical energy to achieve energy supply on the user side. Because it includes the energy storage and distribution control device of any embodiment of the utility model, it has the same beneficial effects and is not repeated here.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An energy storage and distribution control device, characterized in that: include: A mainframe box and a functional unit located in the mainframe box; the functional unit includes a main controller, an inverter and a battery management unit; The external power supply is connected to the energy storage battery through the inverter; the battery management unit is connected to the energy storage battery and the inverter respectively; the main controller provides multiple control signal terminals and multiple communication signal terminals; the control signal terminal is used for the external load to connect to the main controller; the communication signal terminal is used for the inverter and the battery management unit to communicate with the main controller.

2. The energy storage and distribution control device according to claim 1, characterized in that: The main controller is provided with a DC switching power supply, which is electrically connected to the energy storage battery; the DC switching power supply is used to provide internal power supply.

3. The energy storage and distribution control device according to claim 1, characterized in that: The functional unit also includes a first detection unit, which is arranged between the inverter and the energy storage battery and is communicatively connected to the main controller; the first detection unit is used to detect electrical parameters input or output by the energy storage battery.

4. The energy storage and distribution control device according to claim 1, characterized in that: The communication signal terminal includes a LAN communication terminal, a 2.4G / 4G antenna terminal, an RS485 communication terminal and a CAN communication terminal.

5. The energy storage and distribution control device according to claim 1, characterized in that: It also includes a switch unit, which is arranged in the line between the external power supply and the inverter, and is used to jump to a circuit-breaking state when the voltage between the external power supply and the inverter is greater than a threshold.

6. The energy storage and distribution control device according to claim 5, characterized in that: The switch unit is a shunt release.

7. The energy storage and distribution control device according to claim 6, characterized in that: It also includes a lightning protection unit, and an output side of the switch unit is connected in parallel with the lightning protection unit.

8. The energy storage and distribution control device according to claim 5, characterized in that: It also includes a metering meter; the input end of the metering meter is connected to the line between the external power supply and the inverter, and the metering meter is used to measure the electrical parameters of the input or output of the external power supply.

9. An energy storage system, characterized in that: It includes the energy storage and power distribution control device as described in any one of claims 1-8.

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