Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
The term "module" as used in the embodiments of the present application refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and software code that is capable of performing the function associated with that element.
Some terms related to the embodiments of the present application are explained as follows:
BMS: the battery management system is mainly used for monitoring the running state of each battery in the battery energy storage unit and guaranteeing the safe and reliable running of the energy storage unit. The BMS can monitor and collect state parameters (including but not limited to single battery voltage, battery post temperature, battery loop current, battery pack terminal voltage, battery system insulation resistance and the like) of the energy storage battery in real time, performs necessary analysis and calculation on relevant state parameters to obtain more system state evaluation parameters, and realizes effective management and control on the energy storage battery body according to a specific protection control strategy so as to ensure safe and reliable operation of the whole battery energy storage unit. Meanwhile, the BMS can perform information interaction with other external equipment (PCS, EMS, fire-fighting system and the like) through a communication interface and an analog/digital input/output interface of the BMS, so that linkage control of all subsystems in the whole energy storage power station is formed, and safe, reliable and efficient grid-connected operation of the power station is ensured. In addition, the BMS has the following functions: the battery is safely managed, and the possible faults are subjected to alarm and emergency protection treatment; and the operation of the battery module and the battery cluster is safely and optimally controlled, so that the safe, reliable and stable operation of the battery is ensured.
BCU: and the battery cluster management unit is used for managing and controlling the equipment of the battery clusters. The system is mainly responsible for monitoring the state and performance of the battery cluster and carrying out charge and discharge control according to the requirement so as to ensure the safe and reliable operation of the battery cluster. The BCU monitors parameters such as voltage, temperature, current and the like of each single battery in the battery cluster to know the state of the battery in real time. It uses sensors to collect these data and sends them to a control unit for data processing and analysis. Based on these data, the BCU can determine the performance and status of the battery and take appropriate action to manage and control. In addition to monitoring and control functions, BCU has other advanced functions such as battery level management, battery balancing management, thermal management, and fault diagnosis. These functions may improve the efficiency and life of the battery cluster while ensuring safe and reliable operation thereof.
BMU: a battery management unit (Battery Management Unit), which is a system for managing battery modules, can detect the state (voltage, temperature, etc.) of the battery and provide a communication interface for the battery. The main functions of the BMU include: the BMU can monitor parameters such as voltage, current, temperature and the like of the battery in real time and send the data to other equipment for data processing and analysis; the BMU can protect the battery from being damaged by overcharge, overdischarge, overcurrent and the like, and prolong the service life of the battery; the BMU can provide an interface for communication with other devices (such as a charging pile, an energy management system and the like) to realize sharing and interaction of data; the BMU can reasonably control the charge and discharge processes of the battery according to the charge state and the running condition of the battery, and improves the energy utilization efficiency.
Among them, the BMS is management for the entire energy storage system, and it covers management from the battery cells, the battery packs to the battery clusters, and the entire battery system. At the bottom layer, the BMS monitors and collects operation information of the battery, such as temperature, voltage, current, SOC (state charge capacity), SOH (state health), etc., in real time through the BMU. The BMU transmits monitoring data to the BMS through a communication interface with the BMS, and after the BMS performs data processing and analysis, the BMS controls the charging and discharging processes of the battery according to set parameters so as to ensure operation in a safety range. Meanwhile, the BMS can respond and control various changes and abnormal conditions in the charging and discharging processes in time through coordination among the units so as to realize comprehensive management and protection of the battery pack.
The BCU is a part of the BMS, which manages the individual battery clusters integrated by the battery pack. The BCU is composed of a plurality of battery modules and circuit devices (a monitoring and protecting circuit, an electric and communication interface, a thermal management device and the like) which are connected through a circuit, and can control the charge and discharge processes of the plurality of battery modules and monitor the states of the battery modules. The BCU realizes information interaction through a communication interface with the BMU, and monitors and adjusts the state and performance of the battery cluster in real time. When abnormal information is monitored, the BCU can command the BMU to perform corresponding operation, so that accurate control is realized.
In summary, among the energy storage systems, the BMS is the highest level management system, which covers management from the battery cells to the entire battery system. BCU is a part of BMS and is focused on the management of battery clusters. The BMU is a device at a lower layer and is responsible for monitoring and collecting the operation information of the battery in real time and transmitting the data to an upper layer management system for data processing and analysis. The three are mutually cooperated to jointly ensure the safe, efficient and reliable operation of the energy storage system.
PCS: the energy storage converter is also called as a bidirectional energy storage inverter. The device is a core component for realizing bidirectional flow of electric energy between an energy storage system and a power grid, and is used for controlling the charging and discharging processes of a battery to perform alternating current-direct current conversion. The main functions of PCS include: and (3) performing constant power or constant current control according to the microgrid monitoring instruction to charge or discharge the battery, and simultaneously smoothing the output with strong fluctuation of wind photovoltaic and the like.
ESCU: the energy storage control unit is mainly responsible for controlling the charge and discharge process of the energy storage battery and realizing the storage and management of energy. The ESCU monitors and manages the state of charge, the state of health and the like of the battery by collecting information such as the voltage, the current and the temperature of the battery, and simultaneously controls the charge and discharge processes of the battery according to the collected information so as to ensure the safety and the reliability of the battery. In addition, ESCU still possesses the communication function with electric wire netting or other energy systems, can realize energy dispatch and optimal management, improves energy utilization efficiency.
EMS: the energy management system can realize real-time monitoring and intelligent management of each device of the system. The EMS can realize data acquisition, storage, processing, uploading, operation control, operation policy formulation and the like, and overall informationized monitoring management is carried out.
The industrial and commercial energy storage equipment is energy storage equipment used in industrial or commercial terminals, and industrial and commercial users can not only utilize peak-to-valley electricity price difference to reduce operation cost, but also serve as a standby power supply to cope with sudden power failure accidents by configuring the industrial and commercial energy storage equipment. Existing industrial and commercial energy storage devices typically include battery clusters, high voltage tanks, BMS, PCS, power supply loops, control loops, and the like.
However, in the existing industrial and commercial energy storage equipment, the fusion of the PCS and the BMS is low, the PCS and the high-voltage tank pre-charging loop cannot be mutually restricted, so that the PCS and the high-voltage tank pre-charging loop can possibly perform pre-charging actions at the same time, the control system is disordered, the performance of the relay is reduced, and the cost of the energy storage equipment is increased due to the repeated design of electrical protection.
In face of the technical problem, the embodiment of the application provides the energy storage device, a high-voltage box is omitted on hardware, and the BCU can acquire voltage and current data acquired by the PCS, so that the connection between the BCU and the PCS is tighter, the fusion capability of the PCS and the BMS is enhanced, the disorder of a control system of the energy storage device can be effectively prevented, and the cost of the energy storage device can be reduced. Reference is made specifically to the following examples of the present application.
Referring to fig. 1, fig. 1 is a schematic diagram of a communication architecture of an energy storage device according to an embodiment of the present application. In some embodiments of the present application, the energy storage devices include EMS110, ESCU120, and at least one energy storage sub-device, such as energy storage sub-device 131, energy storage sub-devices 132, … …, energy storage sub-device 13n, and the like. Each of the above energy storage sub-devices includes a battery cluster (not shown in fig. 1), a PCS, and a BCU. In addition, each energy storage sub-device further comprises a plurality of BMUs, such as BMU-1, BMU-2, … …, BMU-n and the like, each BMU is connected with a corresponding battery pack, n battery packs form a battery cluster, the plurality of BMUs are connected with the BCUs, and the connection mode can be serial connection or parallel connection; the selection of n in the above-described one battery cluster is preferably 4, 6 or 8.
In some embodiments, the PCS in each of the energy storage sub-devices is configured to collect voltage and current data of the battery cluster, and send the collected voltage and current data to the BCU; the BCU is used to transmit the voltage and current data to the ESCU120, and the ESCU120 is used to transmit the voltage and current data to the EMS110.
Each BMU in each energy storage sub-device CAN acquire single voltage and temperature data in a corresponding battery pack, and the single voltage and temperature data are uploaded to the BCU through a CAN bus or a daisy chain communication mode. The PCS is in communication connection with the BCU, the BCU does not collect voltage and current data of the battery cluster any more, the PCS collects the voltage and current data of the battery cluster, and the BCU directly obtains voltage and current information collected by the PCS from the PCS.
In some embodiments, the EMS110 is configured to generate charge and discharge management information according to the voltage and current data, and send the charge and discharge management information to the ESCU120, where the ESCU120 is configured to send the charge and discharge control command to the PCS and BCU in each of the energy storage sub-devices according to the charge and discharge management information, so that charge and discharge control of the whole industrial and commercial energy storage device can be achieved.
In the embodiment of the application, the energy storage device may be implemented by one or more energy storage sub-devices, which may have the following beneficial effects:
the capacity expansion is convenient: by increasing the number of energy storage sub-devices, the overall capacity of the energy storage device can be expanded to meet larger-scale energy storage requirements.
The modularized design is convenient: the energy storage sub-equipment can be independently operated and managed, and has the characteristic of modularization. The design enables the configuration of the energy storage device to be more flexible, and the energy storage device can be combined and expanded according to actual requirements.
And (3) independent control: each energy storage sub-device can be provided with an independent control system, so that accurate control of each device is realized. The independent control mode can improve the operation efficiency and stability of the whole energy storage device.
Redundancy backup: when one of the energy storage sub-devices fails, the other sub-devices can continue to operate normally, and a redundant backup function is provided. This increases the reliability and usability of the energy storage device.
Optimizing resource configuration: by deploying different energy storage sub-devices at different positions or in different application scenes, the optimal configuration of resources can be realized. For example, a high energy density energy storage sub-device is used in a scenario requiring high power output, while a high power density energy storage sub-device is used in a scenario requiring long time energy storage.
The cost is reduced: the whole cost of the energy storage equipment can be reduced by the methods of batch purchasing, optimal design, production cost reduction and the like. Meanwhile, unnecessary waste and loss can be reduced by reasonably configuring and using the energy storage sub-equipment, and the running cost is further reduced.
The energy utilization efficiency is improved: by reasonably arranging the charge and discharge time and the power output of the energy storage sub-equipment, the energy utilization efficiency can be optimized. For example, the power grid is charged in the low-valley period of the power grid demand and discharged in the peak period, so that the load pressure of the power grid is relieved, and the energy utilization efficiency is improved.
The stability of the system is improved: multiple energy storage sub-devices operating in parallel may increase the stability of the overall energy storage system. When one of the sub-devices fails, the other sub-devices can continue to provide power support, so that the normal operation of the system is ensured.
Easy maintenance and management: the plurality of energy storage sub-devices can be maintained and managed respectively, so that the maintenance and management of the whole energy storage system are more convenient. Meanwhile, the distributed management mode also improves the reliability and flexibility of the system.
The energy storage equipment provided by the embodiment of the application omits a high-voltage box on hardware, and the BCU can acquire voltage and current data acquired by the PCS, so that the connection between the BCU and the PCS is tighter, the fusion capability of the PCS and the BMS is enhanced, the disorder of a control system of the energy storage equipment can be effectively prevented, and the cost of the energy storage equipment can be reduced. And, because the energy storage device may be composed of one or more energy storage sub-devices, the overall capacity of the energy storage device may be expanded according to the energy storage needs of the user; meanwhile, each energy storage sub-device is provided with independent PCS and BCU, so that accurate control of each energy storage sub-device can be realized, and the operation efficiency and stability of the whole energy storage device are improved; in addition, the stability of the whole energy storage device can be improved by the parallel operation of the plurality of energy storage sub-devices, and when one of the energy storage sub-devices fails, the other energy storage sub-devices can continue to provide power support, so that the normal operation of the system is ensured.
Based on the descriptions in the above embodiments, in some embodiments of the present application, a PCS and a BCU in each of the above energy storage sub-devices are connected through a first bus; the PCS is used for sending the collected voltage and current data to the BCU through the first bus.
Optionally, the PCS may actively send the collected voltage and current data to the BCU through the first bus, or may send the collected voltage and current data to the BCU through the first bus after receiving an acquisition instruction sent by the BCU. Alternatively, the BCU may directly read the voltage and current data collected by the PCS through the first bus.
Alternatively, the first bus may be various types of communication buses, such as a CAN bus, which is not limited in the embodiments of the present application.
In some embodiments, the PCS and ESCU120 in each of the above energy storage sub-devices are connected by a communication network; the ESCU is used for sending charge and discharge control commands to each PCS by utilizing the communication network according to the charge and discharge management information.
Alternatively, the communication network may be a wired communication network or a wireless communication network, which is not limited in the embodiments of the present application. The communication network may be, for example, a local area network (Local Area Network, LAN).
It can be appreciated that, compared with the traditional RS485 communication, the PCS can effectively enhance the anti-interference capability of the energy storage device and enhance the stability of data communication by communicating with the ESCU120 through the network port.
In some embodiments, the BCU in each of the above energy storage sub-devices is connected to ESCU120 via a second bus; the BCU is configured to send the voltage and current data to ESCU120 via a second bus.
Alternatively, the BCU may actively send the voltage and current data to the ESCU120 through the second bus, or may send the voltage and current data to the ESCU120 through the second bus after receiving an acquisition command sent by the ESCU120. Alternatively, ESCU120 can read the voltage and current data in BCU directly through the second bus.
Alternatively, the second bus may be various types of communication buses, such as a CAN bus, which is not limited in the embodiments of the present application.
In some embodiments, the BCU may control the voltage data refresh rate to be within 100ms and the temperature data refresh rate to be within 1s when communicating with the ESCU120 via the second bus.
In some embodiments, ESCU120 and EMS110 are connected by a communications network; ESCU120 is configured to send the voltage and current data to EMS110 via the communication network.
Alternatively, the communication network may be a wired communication network or a wireless communication network, which is not limited in the embodiments of the present application. By way of example, the communication network may be a 4G network, a 5G network, an ethernet network, or the like.
In some embodiments, EMS110 acts as an energy management unit to issue charge and discharge management information to ESCU120, and ESCU120 implements charge and discharge control of the entire industrial and commercial energy storage system by issuing control commands to PCS and BCU, respectively.
Based on the description of the foregoing embodiments, referring to fig. 2, fig. 2 is a schematic diagram of a communication architecture of an energy storage device according to an embodiment of the present application. In some embodiments of the present application, the energy storage device further includes an anti-backflow meter 140 and a bi-directional meter 150. Wherein, anti-reflux meter 140 and bi-directional meter 150 are both communicatively coupled to ESCU120.
Alternatively, the anti-backflow ammeter 140 and the bidirectional meter 150 may be connected to the ESCU120 in a RS485 communication manner, which is not limited in the embodiment of the present application.
The anti-backflow electricity meter 140 and the bi-directional electricity meter 150 are both devices for monitoring and measuring electric energy. The anti-reverse-flow ammeter 140 is mainly applied to a grid-connected system, and can monitor and display the current value flowing into a power grid in real time. When detecting that current flows to the power grid, the anti-backflow ammeter can cut off the power supply immediately, and damage to the power grid caused by backflow of current is prevented. The bidirectional metering ammeter 150 can monitor and meter the input and output electric energy at the same time, can precisely meter the electric energy consumed by the load, and provides important data support for optimizing and operating the system.
Each of the energy storage sub-devices further comprises a Heating, ventilation and Air Conditioning, HVAC (Heating, ventilation and air conditioning) module and a fire module. Wherein, the HVAC module and the fire module are both connected with the BCU.
Optionally, the HVAC module may be in RS485 communication connection with the BCU, and the fire protection module may be in I/O interface communication connection with the BCU, which is not limited in this embodiment of the present application.
The HVAC module can control and adjust the temperature and the humidity of the battery to ensure the performance and the safety of the battery. The fire control module can be used for monitoring the running state of the energy storage sub-equipment in real time, for example, abnormal conditions such as temperature, smoke, gas and the like are detected, and can immediately generate alarm information so as to ensure the safe running of the energy storage equipment.
Referring to fig. 3, fig. 3 is a schematic diagram of a control strategy of an energy storage device according to an embodiment of the present application. In some embodiments of the present application, the EMS may implement issuing a control command; the ESCU can realize stack level control, charge and discharge control, system interface display, EMS control command execution and the like; the PCS can realize the execution of charge and discharge commands, the uploading of alarm information and the like; the BCU can realize single cell cluster data acquisition, alarm information uploading, battery fault information uploading and the like; the PCS and the BCU can directly realize sharing of the voltage and current data, interaction linkage of alarm information and the like.
According to the energy storage device provided by the embodiment of the application, after the high-voltage box is omitted on hardware, the BCU does not need to directly collect voltage and current data of the cluster-level direct current bus, but can acquire the direct current and voltage information of the direct current bus collected by the PCS through the bus, so that the BCU can be more tightly connected with the PCS, and the fusion capability of the PCS and the BMS is enhanced.
Based on the descriptions in the foregoing embodiments, referring to fig. 4, fig. 4 is a schematic circuit structure of an energy storage sub-device according to an embodiment of the present application. In some embodiments of the present application, the energy storage sub-device includes a battery cluster 401, a PCS402, a first circuit breaker QF1, and an auxiliary power supply loop 403. The auxiliary power supply circuit 403 includes a black start circuit 4031, a second circuit breaker QF2, and a BCU.
In some embodiments, PCS402 includes a direct current filter circuit EMI, a first contactor KM1, a second contactor KM2, a pre-charge resistor R, a fuse FU, and an AC/DC inverter circuit. Wherein:
the direct current filter circuit EMI is connected in parallel between the positive electrode interface and the negative electrode interface of the battery cluster 401; the EMI can be used for a circuit for filtering useless signals in a power circuit, so that the interference of the signals can be reduced, and the stable output of the power is ensured.
The first end of the first contactor KM1 and the first end of the second contactor KM2 are connected with the positive electrode interface, the second end of the first contactor KM1 is connected with the first direct current end of the AC/DC inverter circuit, and the pre-charging resistor R is connected between the second end of the second contactor KM2 and the first direct current end in series; the fuse FU is connected in series between the negative electrode interface and a second direct current end of the AC/DC inverter circuit; the alternating current end of the AC/DC inverter circuit is connected with the first end of the first breaker QF1, and the second end of the first breaker QF1 is connected with an external power grid.
The contactor is an electrical device for remotely switching on and off a circuit, and is commonly used for controlling loads such as a motor. The device consists of a contact, a coil, an arc extinguishing device and the like, and can control the opening and closing of the contact by controlling the current of the coil, thereby controlling the on-off of the current.
A precharge resistor is a resistor used to limit current, and is commonly used in circuits to prevent excessive current from burning out electrical equipment. When the contactor is on, the pre-charge resistor may limit the instantaneous value of the current, thereby protecting the electrical equipment in the circuit.
A fuse is a device for protecting a circuit, and when a current in the circuit exceeds a rated value, the fuse blows due to overheating, thereby cutting off the current and protecting electrical equipment in the circuit.
A circuit breaker is a switching device for making and breaking an electrical circuit, which can be controlled manually or automatically. The device consists of a contact, a spring, an operating mechanism and the like, and the opening and closing of the contact can be controlled through the operating mechanism, so that the on-off of current is controlled. The circuit breaker has overload protection, short-circuit protection and other functions, and when overload, short-circuit and other conditions occur in the circuit, the circuit breaker can automatically break the circuit to protect electrical equipment in the circuit.
An AC/DC inverter circuit is a circuit that converts alternating current into direct current. In the inverter circuit, the voltage of the ac power supply is rectified into a dc voltage by a rectifying circuit, and then smoothly output through a filter. At the output of the inverter circuit, a direct current is available, the voltage and frequency of which are different from those of the input alternating current power supply.
In the embodiment of the application, the precharge control and short-circuit protection circuit of the PCS402 avoids the repeated design of the precharge and short-circuit protection of the high-voltage box in the electrical design, directly connects the battery outlet with the direct-current input side of the PCS through the high-voltage wire harness, and enables the direct-current input port of the PCS to be close to the battery outlet as much as possible in the device layout, so that a better short-circuit protection effect can be achieved.
In the embodiment of the application, the on-off control of the cluster-level direct current bus can be realized through the fuse and the pre-charging loop, and the fuse can provide the short-circuit protection function of the direct current bus. The two electrical structures can completely replace relays, pre-charge circuits and fuses in the traditional high-voltage tank. The voltage and current data of the cluster-level direct current bus can be acquired by the voltage and current acquisition circuit in the PCS and transmitted to the BCU in a bus communication mode, so that a voltage and current acquisition loop of the cluster-level direct current bus in a traditional high-voltage box can be omitted, a voltage and current acquisition interface on the BCU is not required to be used, the module can be removed when the BCU is designed in hardware, the hardware cost can be saved, and the fusion of the PCS and the BMS is realized.
In some embodiments, the black start circuit 4031 includes a first fuse FU1, a second fuse FU2, a DC/DC switching power supply, a relay KA, an AC/DC switching power supply, and a third contactor KM; wherein:
the first fuse FU1 is connected in series between the positive electrode interface and the first input end of the DC/DC switching power supply, and the second fuse FU2 is connected in series between the negative electrode interface and the second input end of the DC/DC switching power supply; the first end of relay KA connects the output of DC/DC switching power supply, and the second end of relay KA connects the direct current end of AC/DC switching power supply, and the alternating current end of AC/DC switching power supply connects the first end of third contactor KM, and the first end of second circuit breaker QF2 is connected to the second end of third contactor KM, and the first end of first circuit breaker QF1 is connected to the second end of second circuit breaker QF 2.
The black start refers to that after the whole power system is shut down due to failure, the unit without the self-starting capability is driven by the unit with the self-starting capability, the recovery range of the power system is gradually enlarged, and finally the recovery of the whole power system is realized.
In some embodiments, the second terminal of the relay KA is provided with a power supply circuit for supplying power to the BCU.
In the embodiment of the application, under the condition that an external power grid supplies power normally, a normally open point is closed after a KM coil is powered on, and an AC/DC switching power supply outputs DC24V; the normally closed point is disconnected after the KA coil is powered, so that the output of the DC/DC switching power supply is disconnected, and the DC24V power supply for supplying power to the control loop is provided by the AC/DC switching power supply. Under the condition that an external power grid cannot supply power, the KM coil is powered off, the output of the AC/DC switching power supply is disconnected, the KA coil is powered off, the normally closed point is closed, the DC/DC switching power supply outputs DC24V, and the DC24V power supply for supplying power to the control loop under the condition is provided by the DC/DC switching power supply.
In this embodiment of the present application, the black start circuit 4031 can complete automatic switching between the mains supply and the battery powered loop without using a software program, and the switching time is in the millisecond level, so that the effect of ensuring that the important control loop is not powered off can be achieved.
Based on the descriptions in the above embodiments, in some embodiments of the present application, each energy storage sub-device further includes an air cooling component or a liquid cooling component; the air-cooled assembly or liquid-cooled assembly is connected to the second end of the second circuit breaker QF 2.
In some embodiments of the present application, the energy storage device includes a master energy storage sub-device and at least one slave energy storage sub-device; the power supply circuit in the main energy storage sub-device is also used for supplying power to the ESCU and the communication network respectively.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an energy storage device according to an embodiment of the present application.
In fig. 5, the energy storage device includes a master energy storage sub-device 501 and a plurality of slave energy storage sub-devices, namely slave energy storage sub-devices 502, … … and slave energy storage sub-device 50n.
Alternatively, the number n of slave energy storage sub-devices may be 1, or may be 2, 3, 4, or the like, which is not limited in the embodiments of the present application.
Wherein the power supply circuitry in the main energy storage sub-device 501 is also used to power the ESCU and the communication network, respectively.
The master energy storage sub-device 501, the slave energy storage sub-devices 502, … …, and the slave energy storage sub-device 50n each include an air cooling assembly, which includes an HVAC module and a fan located in the battery cluster.
One end of the fan is connected to an AC/DC switching power supply, the other end of the AC/DC switching power supply is connected to one end of a breaker QF3, and the other end of the breaker QF3 is connected to the first end of the QF 1.
The HVAC module is connected to one end of the breaker QF4, and the other end of the breaker QF4 is connected to the first end of the QF 1.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an energy storage device according to an embodiment of the present application.
In fig. 6, the energy storage device includes a master energy storage sub-device 601 and a plurality of slave energy storage sub-devices, namely slave energy storage sub-devices 602, … … and slave energy storage sub-device 60n.
The power supply circuit in the main energy storage sub-device 601 is further configured to supply power to the ESCU and the communication network, respectively.
The master energy storage sub-device 501 and the slave energy storage sub-devices 502 and … … each include a liquid cooling component from the energy storage sub-device 50n.
Wherein, above-mentioned liquid cooling subassembly is connected in the one end of circuit breaker QF4, and the first end of QF1 is connected to the other end of circuit breaker QF 4.
The energy storage equipment provided by the embodiment of the application adopts a main multi-slave structure, and the power supply circuit in the main energy storage sub-equipment supplies power to the ESCU and the communication network, so that the circuit structure can be simplified, and the cost of the energy storage equipment is reduced.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in each embodiment of the present application may be integrated in one processing unit, or each module may exist alone physically, or two or more modules may be integrated in one unit. The units formed by the modules can be realized in a form of hardware or a form of hardware and software functional units.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.