CN111509317B - Energy storage management method and system for storage battery and electronic equipment - Google Patents
Energy storage management method and system for storage battery and electronic equipment Download PDFInfo
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- CN111509317B CN111509317B CN202010430566.3A CN202010430566A CN111509317B CN 111509317 B CN111509317 B CN 111509317B CN 202010430566 A CN202010430566 A CN 202010430566A CN 111509317 B CN111509317 B CN 111509317B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides an energy storage management method, an energy storage management system and electronic equipment for a storage battery, wherein the method comprises the following steps: monitoring each battery cluster system in real time, and feeding back monitoring information to a master control mechanism to determine the battery cluster system to be stored and processed; butting a high-voltage socket and a low-voltage socket in the battery cluster system with a high-voltage socket and a low-voltage socket of a master control mechanism to start control actions; sending an instruction to a battery stack management unit of the battery cluster system to control the attraction with a pre-charging contactor; and according to a judgment rule, determining that the pre-charging contactor is disconnected and the main contactor is attracted, and merging the battery clusters into an energy storage management system so as to perform energy storage management on the electric quantity consumption and supply of each battery cluster system. The energy storage management method disclosed by the invention has the advantages that the single-cluster battery systems are combined into a unified whole, and the high-low voltage socket which can be plugged and pulled quickly is matched, so that the flexible configuration of electric quantity can be realized, and more effective energy storage management control can be carried out.
Description
Technical Field
The invention relates to the field of electrochemical energy storage, in particular to an energy storage management method and system for a storage battery and electronic equipment.
Background
Energy storage is an important component of future new energy power generation and even power systems, and from the practical development of the power industry of various countries in the world, energy storage is an effective way for solving the problem of renewable energy consumption and stabilizing new energy fluctuation.
The main equipment of the energy storage management system comprises a battery energy storage unit, an energy storage, current transformation and voltage boosting integrated device, an energy storage energy management system, a communication and control system and the like. The battery energy storage unit adopts a scheme that battery clusters are connected in parallel, and is arranged indoors or outdoors according to the arrangement condition of the energy storage management system.
A conventional energy storage management system is often found in a container type energy storage management system, wherein the electric quantity in a battery energy storage unit is configured according to the actual needs of a user; when the load changes, the total electric quantity of the battery energy storage unit cannot be quickly adjusted according to the requirements of users.
Therefore, there is a need for an energy storage management system with flexibly configurable capacity.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides an energy storage management method for a storage battery, the method comprising: monitoring each battery cluster system in real time, and feeding back monitoring information to a master control mechanism to determine the battery cluster system to be stored and processed; butting a high-voltage socket and a low-voltage socket in the battery cluster system with a high-voltage socket and a low-voltage socket of a master control mechanism to start control actions; sending an instruction to a battery stack management unit of the battery cluster system to control the attraction with a pre-charging contactor; and according to a judgment rule, determining that the pre-charging contactor is disconnected and the main contactor is attracted, and merging the battery clusters into an energy storage management system so as to perform energy storage management on the electric quantity consumption and supply of each battery cluster system.
Preferably, the monitoring each battery cluster system in real time includes: monitoring the state, the residual quantity or the click fault of each battery in each battery cluster system in real time, wherein when the current electric quantity consumption is monitored to be smaller than a set threshold value, energy storage processing is determined to be carried out on one battery cluster system; and/or when the current electric quantity consumption is monitored to be larger than a set threshold value, determining the number of the battery cluster systems to be stored and processed.
Preferably, the high-voltage socket of the battery cluster system to be stored and processed is in butt joint with the high-voltage socket of the master control mechanism through a high-voltage cable, and the low-voltage socket of the battery cluster system is in butt joint with the low-voltage socket of the master control mechanism through a low-voltage cable, so as to be incorporated into the energy storage management system.
Preferably, the method further comprises: and setting a judgment rule, and judging to be incorporated into the energy storage management system when the difference between the voltage on the bus of the control mechanism and the battery voltage of the monitored battery cluster system is smaller than a set value.
Preferably, the method further comprises: monitoring the total battery capacity of an energy storage management system, determining the increased number of battery cluster systems under the condition that the difference between the monitored battery consumption and the total battery capacity exceeds a preset maximum value, and merging the determined battery cluster systems into the energy storage management system through two high-voltage sockets and one low-voltage socket; and under the condition that the difference between the monitored battery consumption and the total battery capacity is smaller than a preset minimum value, determining the number of the battery cluster systems, and disconnecting the rest of the battery cluster systems from the energy storage management system.
Preferably, the method further comprises: the battery electric quantity of each battery cluster system is monitored and managed through the master control mechanism, so that the electric quantity of each battery module is controlled within a safe preset range.
Preferably, the method further comprises: the master control mechanism comprises a high-voltage socket and a low-voltage socket, and the voltage output by the low-voltage socket is used for supplying power to each battery cluster system.
Preferably, the method further comprises: the pre-charging contactor and the pre-charging resistor are connected in series, so that the batteries of each battery cluster system are pre-charged for a specific time under the condition of inconsistent voltage.
In addition, the invention also provides an energy storage management system, which uses the method of the invention to carry out energy storage management, and the energy storage management system comprises: the battery cluster system comprises a battery cluster high-voltage power distribution device, a plurality of battery modules and a cabinet body, wherein a high-voltage socket and a low-voltage socket are mounted on the cabinet body; the energy storage converter comprises a DC/AC bidirectional converter and a control unit, the energy storage converter is used for controlling the charging and discharging processes of a storage battery and is connected with each battery cluster system in a high-voltage mode, the remote monitoring management device is used for monitoring and managing the running state and the electric quantity of the battery of the energy storage converter, and the energy management device comprises a battery stack management unit (BSE), a battery cluster management unit (BCE) and a battery module management unit (BME).
In addition, the present invention also provides an electronic device, wherein the electronic device includes: a processor; and a memory storing computer executable instructions that, when executed, cause the processor to perform the energy storage management method according to the invention.
The invention has the beneficial effects that:
compared with the prior art, the energy storage management method disclosed by the invention has the advantages that the single-cluster battery systems are combined into a unified whole, and the high-low voltage socket capable of being plugged and unplugged quickly is matched, so that the flexible configuration of electric quantity can be realized, and more effective energy storage management control can be carried out. In addition, the energy storage management system is highly integrated, the system electric quantity can be flexibly configured, when the electric load changes, the configuration of the system electric quantity can be flexibly increased or reduced, the installation and the circuit design are simplified by the high integration, and the overall performance of the system is improved.
Drawings
Fig. 1 is a schematic flow chart of an example of an energy storage management method for a storage battery according to the present invention.
Fig. 2 is a system architecture diagram of an energy storage management system to which the energy storage management method for a secondary battery of the present invention is applied.
Fig. 3 is a schematic flow chart of another example of the energy storage management method for the storage battery according to the present invention.
Fig. 4 is a schematic structural block diagram of a battery cluster system of the energy storage management system of the present invention.
Fig. 5 is a schematic diagram of the high voltage distribution box of the present invention.
Fig. 6 is a schematic structural block diagram of an application scenario of the energy storage management system of the present invention.
Fig. 7 is a schematic structural block diagram of a main control mechanism (main control cabinet) of the energy storage management system of the present invention.
Fig. 8 is a schematic block diagram of an exemplary embodiment of an electronic device according to the present invention.
Fig. 9 is a schematic block diagram of an exemplary embodiment of a computer-readable medium according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings in combination with the embodiments.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but are not to be construed as limiting the present invention. In the present invention, the first surface is an upper surface, and the second surface is a lower surface opposite to the first surface.
Example 1
An embodiment of an energy storage management method for a storage battery will be described below with reference to fig. 1 to 3.
Fig. 1 is a schematic flow chart of an example of an energy storage management method for a storage battery according to the present invention.
As shown in fig. 1, a method for energy storage management of a battery, the method comprising:
and S101, monitoring each battery cluster system in real time, and feeding back monitoring information to a master control mechanism to determine the battery cluster system to be subjected to energy storage processing.
And S102, butting a high-voltage socket and a low-voltage socket in the battery cluster system with a high-voltage socket and a low-voltage socket of a master control mechanism to start control actions.
Step S103, sending a command to a cell stack management unit (BSE) of the battery cluster system to control the attraction with a pre-charging contactor (i.e. pre-charging process).
And step S104, according to the judgment rule, determining that the pre-charging contactor is disconnected and the main contactor is attracted, and merging the battery clusters into an energy storage management system to perform energy storage management on the electric quantity consumption and supply of each battery cluster system.
In this example, the energy storage management method of the present invention is applied to an energy storage management system, which includes a battery cluster system and a master control mechanism electrically connected to the battery cluster system, where the master control mechanism includes an energy storage converter, and a remote monitoring management device and an energy management device electrically connected to the energy storage converter; the battery cluster system comprises a battery cluster high-voltage power distribution device, a plurality of battery modules and a cabinet body, wherein a high-voltage socket and a low-voltage socket are mounted on the cabinet body; the energy management apparatus includes a stack management unit (BSE), a battery cluster management unit (BCE), and a battery module management unit (BME). The energy storage management system performs energy storage management on each battery cluster system through a master control mechanism, which can be seen in fig. 2.
Specifically, in step S101, each battery state, remaining battery amount, or click failure in each battery cluster system is monitored in real time, wherein when it is monitored that the current power consumption is less than a set threshold, it is determined that energy storage processing is performed on one battery cluster system.
Further, when the current power consumption is monitored to be larger than a set threshold value, the number of the battery cluster systems to be stored and processed is determined.
It should be noted that, in the invention, the set threshold is determined according to the Power of a Power Conversion System (PCS for short) and the requirement of a user on energy storage, for example, the Power of the PCS is 50KW, the electric quantity of a single battery cluster System is 150KWh, and at this time, the whole System is charged in a valley of 3 hours theoretically, and discharged in a peak of 3 hours; as the user steps from winter to summer, the demand of the user for energy storage rises to 300KWh, and meanwhile, a battery cluster system needs to be added; however, the charging and discharging power is still limited by the power of the PCS, and at this time, the whole system is charged for 6 hours at the wave trough and discharged for 6 hours at the wave crest.
Next, in step S102, the high-voltage socket and the low-voltage socket in the battery cluster system are docked with the high-voltage socket and the low-voltage socket of the master control mechanism to start a control action.
Specifically, for the determined battery cluster system, the high-voltage socket and the low-voltage socket in the battery cluster system or the plurality of battery cluster systems are butted with the high-voltage socket and the low-voltage socket of the master control mechanism, so as to start the corresponding control unit of the master control mechanism to execute the control action.
For example, when it is monitored that the current power consumption is less than a set threshold, 1 battery cluster system can be selected as an energy storage part, a high-voltage connector of the battery cluster system is in butt joint with a high-voltage connector of a master control mechanism (also called a master control cabinet), a low-voltage connector of the battery cluster system is in butt joint with a low-voltage connector of the master control cabinet, after the butt joint is completed, the master control cabinet is started, a 24V power module in the master control cabinet outputs low voltage to supply to a battery cluster management unit (BCE) and a battery module management unit (BME) in a first cluster battery system, each BME reports information of each battery module to the BCE, and the BCE judges the accessible state of the battery cluster system by combining the information reported by the BMEs and other information (such as insulation resistance) of the battery.
Next, in step S103, the corresponding control unit issues a command to a battery stack management unit (BSE) of the battery cluster system to control the attraction with a precharge contactor (i.e., a precharge process).
In this example, the high-voltage socket and the low-voltage socket of the battery cluster system to be subjected to energy storage processing are butted with the high-voltage socket and the low-voltage socket of the master control mechanism, and then pre-charging processing is performed. Further, the BCE of the battery cluster system controls a pre-charging loop, and when the battery of the battery cluster system is pre-charged to be close to the bus voltage, the BMS host controls a pre-charging relay to be disconnected to terminate the pre-charging.
Next, in step S104, according to the determination rule, it is determined that the pre-charging contactor is disconnected and the main contactor is closed, and the battery cluster is incorporated into the energy storage management system, so as to perform energy storage management on the power consumption and supply of each battery cluster system.
Specifically, as shown in fig. 3, the method further includes a step S301 of setting a determination rule.
In step S301, a determination rule is set, and when the difference between the voltage on the bus of the control mechanism and the battery voltage of the monitored battery cluster system is smaller than a set value, it is determined that the battery cluster system is incorporated into the energy storage management system.
For safety reasons, the set value is, for example, 10V or less, and in this example, 5V.
In this example, the method further includes monitoring a total battery capacity of the energy storage management system, determining an increased number of battery cluster systems in a case where a difference between the monitored battery consumption and the total battery capacity exceeds a preset maximum value, and incorporating the determined battery cluster systems into the energy storage management system through two high voltage sockets and one low voltage socket.
Specifically, under the condition that the difference between the battery consumption and the total battery capacity is monitored to be smaller than a preset minimum value, the number of the battery cluster systems is determined, and the connection between the remaining battery cluster systems and the energy storage management system is disconnected.
Furthermore, the battery electric quantity of each battery cluster system is monitored and managed through a master control mechanism, so that the electric quantity of each battery module is controlled within a safe preset range.
It should be noted that the electric quantity of the energy storage management system is usually controlled to be 10% to 90%, and the interval is dynamically adjusted according to the SOH state of the battery.
Furthermore, the master control mechanism comprises a high-voltage socket and a low-voltage socket, and the master control mechanism supplies power to each battery cluster system through the voltage output by the low-voltage socket.
In the present example, the pre-charging contactor and the pre-charging resistor are connected in series, so that the batteries of each battery cluster system are pre-charged for a certain time under the condition that the voltages are not consistent.
For example, in the case that the initial voltages of the battery cluster systems are inconsistent, the battery cluster system voltage with lower voltage reaches the bus voltage through pre-charging, and is finally merged into the system operation.
It should be noted that the above-mentioned processes of the energy storage management method are only used for illustrating the present invention, and the sequence and number of the steps are not particularly limited. In addition, the steps in the method can be split into two or three steps, or some steps can be combined into one step, and the steps are adjusted according to practical examples.
Compared with the prior art, the energy storage management method disclosed by the invention has the advantages that the single-cluster battery systems are combined into a unified whole, and the high-low voltage socket capable of being plugged and unplugged quickly is matched, so that the flexible configuration of electric quantity can be realized, and more effective energy storage management control can be carried out.
Those skilled in the art will appreciate that all or part of the steps to implement the above embodiments are implemented as programs (computer programs) executed by a computer data processing apparatus. When the computer program is executed, the method provided by the invention can be realized. Furthermore, the computer program may be stored in a computer readable storage medium, which may be a readable storage medium such as a magnetic disk, an optical disk, a ROM, a RAM, or a storage array composed of a plurality of storage media, such as a magnetic disk or a magnetic tape storage array. The storage medium is not limited to centralized storage, but may be distributed storage, such as cloud storage based on cloud computing.
Embodiments of the energy storage management system of the present invention are described below, which may be used to perform method embodiments of the present invention. The details described in the device embodiments of the invention should be regarded as supplementary to the method embodiments described above; reference is made to the above-described method embodiments for details not disclosed in the apparatus embodiments of the invention.
Example 2
With reference to fig. 2, 4 to 7, a storage battery-based energy storage management system of the present invention will be described, which can implement more convenient and flexible configuration of battery capacity by the energy storage management method described in embodiment 1.
Specifically, the energy storage management system includes: the battery cluster system comprises a battery cluster high-voltage power distribution device, a plurality of battery modules and a cabinet body, wherein a high-voltage socket and a low-voltage socket are mounted on the cabinet body; the general control mechanism (also called a general control cabinet) is electrically connected with the battery cluster systems, the general control mechanism comprises an energy storage converter, and a remote monitoring management device and an energy management device which are electrically connected with the energy storage converter, wherein the energy storage converter comprises a DC/AC bidirectional converter and a control unit, the energy storage converter is used for controlling the charging and discharging processes of a storage battery and is connected with each battery cluster system at high voltage, the remote monitoring management device is used for monitoring and managing the running state and the battery electric quantity of the energy storage converter, and the energy management device comprises a battery stack management unit (BSE), a battery cluster management unit (BCE) and a battery module management unit (BME).
Further, the energy storage management system comprises at least two battery cluster systems, the two battery cluster systems are connected in parallel, and two sets of high-voltage sockets and one low-voltage socket are installed on the cabinet body of each battery cluster system.
Furthermore, the two sets of high-voltage sockets are used for being connected with other battery cluster systems in parallel inside, or are used for being connected with the high-voltage sockets of the master control mechanism in parallel, and each set of high-voltage sockets can be used as input ports or output ports.
In this example, the low-voltage socket is used for connecting with other battery cluster systems inside the control mechanism in parallel, or the low-voltage socket is used for connecting with the low-voltage socket of the overall control mechanism in parallel, and the low-voltage socket can be used as an input port or an output port.
In particular, the high-voltage socket and the low-voltage socket are sockets with sealing means.
In this example, the energy storage converter (PCS) is used to control the charging and discharging process of the battery, perform ac/dc conversion, and directly supply power to the ac load. The energy storage converter (PCS) comprises a DC/AC bidirectional converter, a control unit and the like, and the energy storage converter (PCS) also comprises a lightning protection design inside.
Specifically, the ACDC module is 1 module capable of converting 220V ac power into 24V dc power, the power of which is greater than 3KW, and is mainly used for supplying power to ventilation devices in an energy management system, a remote monitoring management system terminal, and a battery cluster system.
It should be noted that, depending on the usage, the battery cluster system may be equipped with a battery heating and heat dissipation module. The battery cluster high-voltage power distribution system comprises a battery cluster management unit (BCE), a direct current contactor, a pre-charging resistor, a fuse and an input/output socket. The battery cluster management unit (BCE) has the functions of high-voltage acquisition, insulation detection, adhesion detection and the like. The pre-charging contactor is connected with the pre-charging resistor in series, and the pre-charging resistor selects a resistor with larger power, such as 1000W or more than 1000W, so as to ensure that the pre-charging can be carried out for a long time under the condition that the voltages of the batteries in each cluster are inconsistent.
Preferably, the battery module comprises a battery core, a battery module management unit (BME) and a cabinet, wherein the cabinet mainly comprises a battery module support and a cabinet.
In addition, positive negative pole socket and signal socket of battery cluster input all directly install on the cabinet body. Further, the bottom of the cabinet body can be provided with a roller or a tray structure, so that the cabinet is convenient to move.
It should be noted that two sets of high-voltage input sockets and low-voltage sockets are mounted on the cabinet body of each battery cluster system. The two sets of high-voltage sockets are connected in parallel inside the high-voltage box, and each set of high-voltage socket can be used as an input port and an output port; two sets of low-voltage sockets are also used in parallel, and each set of low-voltage socket can be used as an input port and an output port, as shown in fig. 4 and 5.
Preferably, the high-voltage socket and the low-voltage socket are sockets with sealing devices, so that the protection level of IP67 level can be realized through a protective cover and other components under the condition that no plug is inserted. When no plug is inserted, a person cannot directly touch the pins in the plug, which should be at the IP67 level protection level.
In this example, the remote monitoring management system includes a remote monitoring management terminal, a remote monitoring management system server and remote monitoring management software, wherein the remote monitoring management terminal may be implemented by a battery stack management unit (BSE), or may be implemented by other devices with an RS485 communication module and an internet connection module. When the BSE is implemented, the BSE is required to send information such as the running state of the PCS and the battery power state in real time, when the remote monitoring management terminal is communicated with the remote monitoring management system server, the modes such as a wireless network, a 2G mode, a 3G mode and a 4G mode can be adopted, the remote monitoring management terminal and the remote monitoring management system need to correct clocks at intervals, and the system is ensured to run in a mode with the maximized economic benefit. In addition, the remote monitoring management software can remotely check the running state of the system and correct or modify some running states.
It should be noted that the energy management system adopts a three-level architecture management mode and is used for completing battery state acquisition, battery life estimation, battery energy balance, battery fault analysis and diagnosis and battery information management. Therefore, the functions of battery state acquisition, battery life estimation, battery energy balance, battery fault analysis and diagnosis, battery information management, data interaction with a power storage converter (PCS) and an Energy Management System (EMS) and the like can be accurately and efficiently completed.
It should be noted that, in this example, the general control mechanism further includes a high-voltage distribution box, and the BSE is used as the energy management host and the remote monitoring management terminal, and when the BSE cannot be used as the remote monitoring management terminal, a new remote monitoring management terminal is required.
Next, a communication architecture of the energy storage management system of the present invention will be described.
Specifically, the BCE and the host BSE of each battery cluster system communicate with each other through a CAN (field bus). And the pre-charging control and the direct current contactor control are both realized by a battery management unit BCE in each battery cluster system.
Preferably, each battery cluster system CAN set its own CAN ID address, implement a uniform coding mode, and avoid duplication of IDs of two battery cluster systems. When the newly incorporated system battery cluster CAN ID (field bus identification) and the existing battery cluster CAN ID are repeated, the CAN ID of the newly incorporated system battery cluster CAN be automatically changed.
Next, the precharge control of the energy storage management system of the present invention will be described.
Specifically, the BCE of each battery cluster system controls a pre-charging loop, and when the batteries of the battery cluster system are pre-charged to be close to the bus voltage, the BMS host controls a pre-charging relay to be disconnected to terminate the pre-charging; and then the direct current contactor is closed, and the battery cluster system is connected in parallel to the system.
For example, the string number of each battery system is consistent, and new battery clusters with the electric quantity of 0-100% can be integrated into the system to achieve benefits.
To more clearly describe the energy storage management system of the present invention, the present invention is further described below with reference to fig. 6 and 7 in conjunction with specific examples.
For example, the operation principle when 1 battery cluster system is operated or 2 battery cluster systems are simultaneously operated is as follows.
When the power consumption is small (i.e., less than a set threshold), 1 battery cluster system may be selected as the energy storage portion. The high-voltage connector of the battery cluster system is butted with the high-voltage connector of a master control mechanism (also called a master control cabinet), and the low-voltage connector of the battery cluster system is butted with the low-voltage connector of the master control cabinet; after the butt joint is completed, starting the control action of the main control cabinet; the 24V power module in the main control cabinet outputs low voltage to supply to the BCE and the BME in the battery system, each BME reports the information of each battery module to the BCE, and the BCE judges the accessible state of the battery system by combining the information reported by the BME and other information (such as insulation resistance) of the battery; when the BCE judges that the battery cluster system can be accessed into the system and is communicated with the BSE successfully, the BCE controls the pre-charging contactor to be attracted, then the positive contactor is attracted, and therefore the battery cluster system is merged into the system and operates.
As shown in fig. 6, when the power consumption becomes larger than the set threshold, and 1 battery cluster system (the first battery cluster) cannot meet the energy storage requirement, a new battery cluster system (the second battery cluster system) may be incorporated into the existing system in case of power failure; and the high-voltage socket and the low-voltage socket of the second battery cluster system are respectively butted with the high-voltage socket and the low-voltage connector of the first battery cluster system.
Further, when the BCE confirms that a new battery cluster system (a second battery cluster system) can be connected into the system, the pre-charging contactor in the battery cluster is controlled to be closed, when the battery voltage of the battery cluster system is pre-charged to be within 5V of the voltage of the battery in the first battery cluster system, the pre-charging contactor is controlled to be opened, and the positive electrode contactor is controlled to be closed, so that the battery cluster system is connected into the system and runs.
In addition, when the power consumption becomes smaller and smaller than the set threshold, the second battery system cluster may be deleted again, for example, the second battery cluster system may be deleted in the case of system shutdown, specifically, the low-voltage socket and the high-voltage socket are sequentially disconnected. And then the system can be restarted to run again.
In embodiment 2, the description of the same portions as those in embodiment 1 is omitted. Further, the number of the battery cluster systems is not particularly limited, and may be two, three, or more. The foregoing is illustrative only and is not to be construed as limiting the invention.
Compared with the prior art, the energy storage management system is highly integrated, can flexibly configure the electric quantity of the system, can flexibly increase or reduce the configuration of the electric quantity of the system when the electric load changes, simplifies the installation and the circuit design by high integration, and improves the overall performance of the system.
Example 3
Embodiments of the electronic device of the present invention are described below, which may be considered as specific physical implementations of the above-described embodiments of the method and system of the present invention. Details described in the embodiments of the electronic device of the invention should be considered supplementary to the embodiments of the method or system described above; for details not disclosed in the embodiments of the electronic device of the invention, reference may be made to the above-described method or system embodiments.
Fig. 8 is a block diagram of an exemplary embodiment of an electronic device according to the present invention. An electronic apparatus 200 according to this embodiment of the present invention is described below with reference to fig. 8. The electronic device 200 shown in fig. 8 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
As shown in fig. 8, the electronic device 200 is embodied in the form of a general purpose computing device. The components of the electronic device 200 may include, but are not limited to: at least one processing unit 210, at least one memory unit 220, a bus 230 connecting different system components (including the memory unit 220 and the processing unit 210), a display unit 240, and the like.
Wherein the storage unit stores program code executable by the processing unit 210 to cause the processing unit 210 to perform steps according to various exemplary embodiments of the present invention described in the above-mentioned electronic device processing method section of the present specification. For example, the processing unit 210 may perform the steps as shown in fig. 1.
The memory unit 220 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)2201 and/or a cache memory unit 2202, and may further include a read only memory unit (ROM) 2203.
The storage unit 220 can also include a program/utility 2204 having a set (at least one) of program modules 2205, such program modules 2205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination thereof may comprise an implementation of a network environment.
The electronic device 200 may also communicate with one or more external devices 300 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 200, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 200 to communicate with one or more other computing devices. Such communication may occur through input/output (I/O) interfaces 250. Also, the electronic device 200 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 260. The network adapter 260 may communicate with other modules of the electronic device 200 via the bus 230. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 200, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments of the present invention described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiment of the present invention can be embodied in the form of a software product, which can be stored in a computer-readable storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to make a computing device (which can be a personal computer, a server, or a network device, etc.) execute the above method according to the present invention. The computer program, when executed by a data processing apparatus, enables the computer readable medium to carry out the above-described methods of the invention.
As shown in fig. 9, the computer program may be stored on one or more computer readable media. The computer readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution device, system, or apparatus. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In situations involving remote computing devices, the remote computing devices may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to external computing devices (e.g., through the internet using an internet service provider).
In summary, the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that some or all of the functionality of some or all of the components in embodiments in accordance with the invention may be implemented in practice using a general purpose data processing device such as a microprocessor or a Digital Signal Processor (DSP). The present invention may also be embodied as apparatus or system programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
While the foregoing embodiments have described the objects, aspects and advantages of the present invention in further detail, it should be understood that the present invention is not inherently related to any particular computer, virtual machine or electronic device, and various general-purpose machines may be used to implement the present invention. The invention is not to be considered as limited to the specific embodiments thereof, but is to be understood as being modified in all respects, all changes and equivalents that come within the spirit and scope of the invention.
Claims (6)
1. An energy storage management method for a battery, the method comprising:
the method comprises the steps of monitoring the state, the residual quantity or the click fault of each battery in each battery cluster system in real time, feeding back monitoring information to a master control mechanism, determining to perform energy storage processing on one battery cluster system when the current electric quantity consumption is monitored to be smaller than a set threshold value, and/or determining the number of the battery cluster systems to be subjected to energy storage processing when the current electric quantity consumption is monitored to be larger than the set threshold value so as to determine the battery cluster systems to be subjected to energy storage processing;
two sets of high-voltage sockets and low-voltage sockets in the battery cluster system are butted with the high-voltage socket and the low-voltage socket of the master control mechanism to start control action, the high-voltage sockets are used for being connected with other battery cluster systems in parallel inside or being connected with the high-voltage socket of the master control mechanism in parallel, each set of high-voltage socket can be used as an input port or an output port, the low-voltage sockets are used for being connected with other battery cluster systems in parallel inside the control mechanism or being connected with the low-voltage socket of the master control mechanism in parallel, and the low-voltage sockets can be used as input ports or output ports;
sending a command to a battery stack management unit (BSE) of the battery cluster system to control the attraction with a pre-charging contactor, pre-charging the batteries of each battery cluster system for a specific time under the condition that the initial voltages are inconsistent by connecting the pre-charging contactor with a pre-charging resistor in series, and merging the batteries into an energy storage management system when the initial voltages reach the specific voltages;
each battery module management unit (BME) reports electric quantity information of each battery module to each battery cluster management unit (BCE), each battery module management unit (BME) judges the current accessible state of a battery cluster system according to the electric quantity information and insulation resistance information of a battery so as to determine the disconnection with a pre-charging contactor and the attraction with a main contactor, each battery cluster is merged into an energy storage management system so as to carry out energy storage management on the electric quantity consumption and supply of each battery cluster system, the electric quantity of the energy storage management system is controlled to be 10-90%, and the interval can be dynamically adjusted according to the SOH state of the battery; the method comprises the steps of monitoring the total battery capacity of the energy storage management system, determining the increased number of battery cluster systems under the condition that the difference between the monitored battery consumption and the total battery capacity exceeds a preset maximum value, and merging the determined battery cluster systems into the energy storage management system through two high-voltage sockets and one low-voltage socket; under the condition that the difference between the monitored battery consumption and the total battery capacity is smaller than a preset minimum value, determining the number of the battery cluster systems, and disconnecting the rest of the battery cluster systems from the energy storage management system; the battery electric quantity of each battery cluster system is monitored and managed through the master control mechanism, so that the electric quantity of each battery module is controlled within a safe preset range.
2. The energy storage management method for the storage batteries according to claim 1, characterized in that the high-voltage socket of the battery cluster system to be energy-stored is docked with the high-voltage socket of the general control mechanism through a high-voltage cable, and the low-voltage socket of the battery cluster system is docked with the low-voltage socket of the general control mechanism through a low-voltage cable, so as to be incorporated into the energy storage management system.
3. The energy storage management method for a battery of claim 1, further comprising:
and setting a judgment rule, and judging to be incorporated into the energy storage management system when the difference between the voltage on the bus of the control mechanism and the battery voltage of the monitored battery cluster system is smaller than a set value.
4. The energy storage management method for a battery of claim 1, further comprising:
the master control mechanism comprises a high-voltage socket and a low-voltage socket, and the voltage output by the low-voltage socket is used for supplying power to each battery cluster system.
5. An energy storage management system, wherein the energy storage management system performs energy storage management by using the method of claim 1, and the energy storage management system comprises:
the battery cluster system comprises a battery cluster high-voltage distribution device, a plurality of battery modules and a cabinet body, wherein two sets of high-voltage sockets and low-voltage sockets are mounted on the cabinet body, the high-voltage sockets and the low-voltage sockets are sockets with sealing devices, the high-voltage sockets are used for being connected with other battery cluster systems in parallel inside or being connected with the high-voltage sockets of a master control mechanism in parallel, each set of high-voltage sockets can be used as input ports or output ports, the low-voltage sockets are used for being connected with other battery cluster systems in parallel inside the control mechanism or being connected with the low-voltage sockets of the master control mechanism in parallel, and the low-voltage sockets can be used as input ports or output ports;
the master control mechanism is electrically connected with the battery cluster system and comprises an energy storage converter, and a remote monitoring management device and an energy management device which are electrically connected with the energy storage converter, wherein,
the energy storage converter comprises a DC/AC bidirectional converter and a control unit, the energy storage converter is used for controlling the charging and discharging processes of the storage battery and is connected with each battery cluster system at high voltage,
the remote monitoring management device is used for monitoring and managing the running state of the energy storage converter and the electric quantity of the battery,
the energy management device comprises a battery stack management unit (BSE), a battery cluster management unit (BCE) and a battery module management unit (BME), wherein each battery module management unit (BME) reports the electric quantity information of each battery module to each battery cluster management unit (BCE), and each battery module management unit (BME) judges the current accessible state of the battery cluster system according to the electric quantity information and the insulation resistance information of the battery; sending an instruction to a battery stack management unit (BSE) of the battery cluster system to control the attraction with a pre-charging contactor, connecting the pre-charging contactor and a pre-charging resistor in series to pre-charge batteries of each battery cluster system for a specific time under the condition that the initial voltages are inconsistent, and connecting the batteries to the energy storage management system when the initial voltages reach a specific voltage, wherein the electric quantity of the energy storage management system is controlled to be 10% -90%, and the interval can be dynamically adjusted according to the SOH state of the batteries; the method comprises the steps that the total battery capacity of the energy storage management system is monitored, the increased number of battery cluster systems is determined under the condition that the difference between the monitored battery consumption and the total battery capacity exceeds a preset maximum value, and the determined battery cluster systems are merged into the energy storage management system through two high-voltage sockets and one low-voltage socket; under the condition that the difference between the monitored battery consumption and the total battery capacity is smaller than a preset minimum value, determining the number of the battery cluster systems, and disconnecting the rest of the battery cluster systems from the energy storage management system; the battery electric quantity of each battery cluster system is monitored and managed through the master control mechanism, so that the electric quantity of each battery module is controlled within a safe preset range.
6. An electronic device, wherein the electronic device comprises:
a processor; and the number of the first and second groups,
a memory storing computer executable instructions that, when executed, cause the processor to perform the energy storage management method of any of claims 1 to 4.
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| CN117318253A (en) * | 2023-11-30 | 2023-12-29 | 杭州科工电子科技股份有限公司 | Anti-reverse connection system of direct current circuit of bus cabinet of energy storage system and alarm method thereof |
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