CN113328453A - Optical coupling switch dormancy awakening circuit and awakening method of low-voltage household energy storage system - Google Patents
Optical coupling switch dormancy awakening circuit and awakening method of low-voltage household energy storage system Download PDFInfo
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- CN113328453A CN113328453A CN202110639927.XA CN202110639927A CN113328453A CN 113328453 A CN113328453 A CN 113328453A CN 202110639927 A CN202110639927 A CN 202110639927A CN 113328453 A CN113328453 A CN 113328453A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention relates to a dormancy awakening circuit and an awakening method of an optical coupling switch of a low-voltage user energy storage system, wherein the awakening circuit is used for managing a battery management system unit part of the low-voltage user energy storage system and comprises: the CAN signal input module, the optocoupler conduction module, the MOS tube control module and the MCU connection module realize awakening after the battery management system enters deep dormancy through an awakening circuit, operation strategy adjustment is carried out according to a power grid, load, energy storage and electricity price, and system operation optimization and user income maximization are realized. The invention realizes the real dormancy and awakening of the battery management system, and the cost is more acceptable than that of household products.
Description
Technical Field
The invention relates to the technical field of wake-up circuits of low-voltage household energy storage systems, in particular to a sleep wake-up circuit and a wake-up method of an optical coupling switch of a low-voltage household energy storage system.
Background
At present, energy storage is applied to a household and a microgrid off-grid system particularly, the requirement on the power consumption of the system is strict, particularly, in the off-grid system, a sleep function is generally needed for an energy storage battery management system, the sleep function can be basically realized, but deep sleep of the system is difficult to realize, namely, a user can only be in a low-power-consumption state when the user does not use or does not communicate for a period of time, so that the power consumption of the battery management system is reduced, but the power consumption is limited, the power supply of an MCU and other peripheral circuits of the board in the low-power-consumption state still exists, the power consumption still exists, the overdischarge and power consumption of the system still exist, and the system cannot be used after a long time.
At present, a conventional external circuit cannot realize a wake-up function, only an expensive integrated chip is provided, and the conventional external circuit cannot be accepted by household products with higher requirements on cost.
Disclosure of Invention
In view of the defects in the background art, the invention relates to a sleep wake-up circuit and a wake-up method for an optical coupling switch of a low-voltage household energy storage system.
The invention relates to a dormancy awakening circuit and an awakening method of an optical coupling switch of a low-voltage user energy storage system, wherein the awakening circuit is used for managing a battery management system unit part of the low-voltage user energy storage system and comprises: CAN signal input module: detecting an external CANH/CANL signal and feeding back the signal input state to a next module; the optical coupling conduction module: the CAN signal input module is used for receiving a CAN signal input signal, and the CAN signal input module is used for receiving a signal; the MOS pipe control module: the circuit comprises a first MOS tube and a second MOS tube, wherein the first capacitor is fully filled by calculating a second resistor, a fourth resistor and the first capacitor to match and determining a reasonable pulse number, and the fully filled first capacitor supplies power to the second MOS tube; MCU link module: the DC/DC power supply module supplies power through VCC and supplies power to the MCU; the battery management system is awakened after entering deep sleep through the awakening circuit, operation strategy adjustment is carried out according to a power grid, load, stored energy and electricity price, and system operation optimization and user income maximization are achieved.
By adopting the scheme, the low-voltage user energy storage system used in the invention adopts the design idea of an integrated micro-grid, can run in an off-grid mode and a grid-connected mode, can realize seamless switching of the running modes, greatly improves the power supply reliability, and is flexible and efficient in configuration. The wake-up circuit of the invention is used for managing the battery management system unit part of the battery in the system, monitoring key data such as the monomer voltage, the temperature state, the photovoltaic charging current, the negative load electricity utilization current, the current electric quantity of the battery pack and the like of the battery pack in real time, particularly in photovoltaic system applications without a grid, photovoltaic panels cannot generate electricity in cloudy or rainy days, at the moment, the battery system with more load power consumption is in a voltage or feed state, the system is required to enter a low power consumption state, namely a sleep state, the traditional sleep is a shallow sleep, the MCU is always in a time detection state, the power consumption is in mA level, in order to ensure that the battery system does not seriously feed due to the power consumption of the battery management system, the requirement on the sleep power consumption is in a microampere level, namely, the battery management system needs to enter a deep sleep state, and the optical coupling switch activates the sleep circuit to wake up the battery management system after entering the deep sleep state.
Furthermore, the first capacitor is an electric storage capacitor, a second capacitor is further arranged in the MOS tube control module, the second capacitor is a filter capacitor, the first resistor is a current-limiting resistor, and the second resistor and the fourth resistor are peripheral resistors and are used for controlling the response time of circuit awakening.
Further, when the MCU supplies power through the DC/DC power supply module, the MCU is started, meanwhile, the MCU sleep control pin is pulled down, the MCU releases the sleep state, and the MCU is normally started.
Further, when the MCU needs to sleep, the MCU sleep control pin is released.
Further, manage low pressure user energy storage system and include energy storage system, family's load, battery, ammeter, cloud control, electric wire netting, energy storage system includes solar panel.
Further, the management low-voltage user energy storage system can be applied to houses, public facilities and small factories.
An optical coupling switch dormancy awakening method of a low-voltage household energy storage system comprises the following steps: s1: the CAN signal input module detects and detects an external signal, and when a CAN signal is input, an optocoupler switch in the optocoupler conduction module is conducted; s2: after the optical coupling switch is switched on, the VCC charges the first capacitor, and the first MOS tube is switched on when the first capacitor is charged to more than 75% of electric quantity; s3: after the first MOS tube is conducted, the source electrode level of a second MOS tube is pulled down, the second MOS tube is conducted at the moment, VCC supplies power to a DC/DC power supply module, and the DC/DC power supply module supplies power to the MCU; s4: starting the MCU after the MCU is powered on, wherein the dormant pin of the MCU is pulled down, the MCU is released from dormancy, and the MCU is started; s5: and when the MCU dormancy control pin is released, the MCU enters a dormancy state.
Further, when the energy storage system for managing the low-voltage users is in a deep sleep state, the optical coupling switch and a circuit at the right end of the optical coupling switch are both in a power-off state, the awakening mode is communication information through the CAN, when data messages exist, the CANH/CANL has a pulse type high level, and when the data messages do not exist, the data messages are in a low level.
Furthermore, when the CAN signal input module has data communication, the problem of inconsistent electric potentials at two ends is solved by a pulse type high level through an optical coupler switch, meanwhile, a first resistor with a current limiting function is added at the front end to ensure that the output high level and the output low level are within a safety range, at the moment, a first capacitor at the front end of a first MOS (metal oxide semiconductor) tube is charged, the first MOS tube cannot be conducted due to the fact that one pulse signal is too short in time, and the capacitor is fully charged by means of system calculation and matching of a peripheral second resistor, a peripheral fourth resistor and a first capacitance value to determine the pulse quantity.
Furthermore, when the first capacitor is fully charged, enough electric quantity is provided for the conduction of the first MOS tube, the second MOS tube is conducted after the first MOS tube is conducted, the DC/DC power supply module of the power supply part of the MCU of the system is started after the second MOS tube is conducted, the system is awakened at the moment, and the MCU is supported by another MCU power supply circuit to supply power after the system is awakened.
By adopting the scheme: the dormancy in the true sense is realized, the power consumption of a battery management system is reduced, the deep dormancy awakening is realized through the optical coupling switch and the resistor and capacitor design, the system cost is reduced, the product volume is reduced, and the problems that the original dormancy and the awakening adopt foreign special chips are solved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic diagram of a wake-up circuit according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a connection structure of a user energy storage system and a wake-up circuit module according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a user energy storage system according to an embodiment of the present invention.
Reference numeral, 1, a CAN signal input module; 11. a first resistor; 2. the optical coupling conduction module; 21. an optocoupler switch; 3. the MOS tube control module; 31. a first capacitor; 32. a first MOS transistor; 33. a second MOS transistor; 34. a second resistor; 35. a third resistor; 36. a fourth resistor; 37. a second capacitor; 4. the MCU is connected with the module; 41. MCU; 42. a DC/DC power supply module; 5. an energy storage system; 6. a home load; 7. a battery; 8. an electricity meter; 9. cloud monitoring; 10. a power grid; 12. a power distribution switch; 13. an energy storage converter; 14. a combiner.
Detailed Description
While the embodiments of the present invention will be described and illustrated in detail with reference to the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking specific embodiments as examples with reference to the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
Example 1: with the proposal of carbon peak reaching and carbon neutralization, green energy is used more and more, particularly, a photovoltaic system is mainly used in a light storage integrated low-voltage household energy storage system, the system structure is shown in fig. 2 and 3, the household energy storage system adopts an integrated household appliance design, is exquisite, beautiful and convenient to install, is provided with a long-life lithium ion battery to provide photovoltaic array access, and can provide electric power for residences, public facility places, small factories and the like. By adopting the design idea of an integrated micro-grid, the off-grid and grid-connected modes can be operated, the seamless switching of the operation modes can be realized, and the power supply reliability is greatly improved; the management system is flexible and efficient to configure, operation strategies can be adjusted according to the power grid, loads, stored energy and electricity prices, and system operation optimization and user income maximization are achieved. The system structure comprises an energy storage system 5, a household load 6, a battery 7, a battery 8, a cloud monitor 9, a power grid 10, a power distribution switch 12, an energy storage converter 13 and a combiner;
the invention is a battery management system unit part used for managing batteries in a system, which monitors key data such as the state of the voltage and the temperature of a battery pack monomer, the photovoltaic charging current, the current of a negative load, the current electric quantity of the battery pack and the like in real time, particularly in the application of a photovoltaic system without a power grid, a photovoltaic panel cannot generate power on a cloudy day or a rainy day, a battery system with more load power consumption is in a voltage or feed state at the moment, the system is required to enter a low power consumption state, namely a sleep state, the traditional sleep state is a shallow sleep state, an MCU41 is always in a moment detection state, the power consumption is in a mA level, in order to ensure that the battery system cannot cause serious feed due to the power consumption of the battery management system, the requirement on the sleep power consumption is in a microampere level, namely to enter a deep sleep state, an optical coupler switch 21 activates a sleep circuit to realize awakening after the battery management system enters the deep sleep state, at present, the conventional external circuit cannot realize the awakening function, only an expensive integrated chip is provided, and the awakening function cannot be accepted by household products with higher cost requirements.
The battery energy storage part is the most main part in the system, so that the reliability and stability of clean energy power supply are solved, meanwhile, the battery energy storage part is also used as a standby power supply, and when the clean energy or power grid power supply suddenly breaks down and cannot supply power, the battery energy storage part can be used as an emergency energy source to output electric energy, so that the normal power supply and use of key power utilization equipment are ensured; the battery energy storage unit mainly comprises a single battery cell, a Battery Management System (BMS), a control unit and related structural components.
The invention relates to a wake-up circuit based on an optical coupling switch, which has the following specific working principle and composition: the wake-up circuit is shown in fig. 1: including CAN signal input module 1, opto-coupler switch-on module 2, MOS management and control module 3, MCU linking module 4, CAN signal input module 1 includes CANH CANL of CAN communication, plays the first resistance 11 of current limiting effect, opto-coupler switch-on module 2 includes opto-coupler switch 21, MOS management and control module 3 includes that the first electric capacity 31 that the deposit was used, second electric capacity 37 that the filtering was used, first MOS pipe 32, second MOS pipe 33, control circuit's the response time's of awakening up second resistance 34 and fourth resistance 36, the third resistance 35 of partial pressure effect. The MCU connection module 4 includes a DC/DC power supply module 42 and an MCU 41. The specific working principle is that when the management system is in a deep sleep state, the optical coupling switch 21 and the circuit at the right end thereof are in a power-off state, the awakening mode is based on communication information of the CAN, when data messages exist, the CANH/CANL has a pulse type high level, when no communication exists, the optical coupling switch is in a low level, when data communication exists, the pulse type high level solves the problem of inconsistent potentials at two ends through the optical coupling switch, meanwhile, the current-limiting first resistor 11 is added at the front end to ensure that the output high and low levels are within a safe range, the first capacitor 31 at the front end of the first MOS tube 32 is charged, because the first MOS tube 32 cannot be conducted due to the short pulse signal time, the capacitor is fully charged through system calculation and the reasonable pulse quantity determined by the value matching of the peripheral second resistor 34, the fourth resistor 36 and the first capacitor 31, and sufficient electric quantity is provided for the conduction of the first MOS tube 32 after the capacitor is fully charged, after the first MOS transistor 32 is turned on, the second MOS transistor 33 is turned on, and after the second MOS transistor 33 is turned on, the DC/DC power supply module 42 of the power supply part for the system MCU41 is started, the system is awakened, and after the system is awakened, the MCU41 is supported by the MCU41 power supply circuit.
The awakening method of the awakening circuit comprises the following steps:
s1: the CAN signal input module detects and detects an external signal, and when a CAN signal is input, the optocoupler switch 21 in the optocoupler conduction module 2 is conducted;
s2: after the optical coupling switch 21 is switched on, the VCC charges the first capacitor 31, and the first MOS tube 32 is switched on when the first capacitor 31 reaches over 75% of electric quantity;
s3: after the first MOS transistor 32 is turned on, the source level of the second MOS transistor 33 is pulled low, at this time, the second MOS transistor 33 is turned on, VCC supplies power to the DC/DC42 power supply module, and the DC/DC42 power supply module supplies power to the MCU 41;
s4: the MCU41 starts to start after power is supplied, at the moment, the sleep pin of the MCU41 is pulled low, the MCU41 stops sleeping, and the MCU41 finishes starting;
s5: when the MCU41 sleep control pin is released, the MCU41 enters a sleep state.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a low pressure family energy storage system's optical coupling switch dormancy awakening circuit which characterized in that: the wake-up circuit is used for managing a battery management system unit part of a low-voltage user energy storage system, and comprises:
CAN signal input module: detecting an external CANH/CANL signal and feeding back the signal input state to a next module;
the optical coupling conduction module: the CAN signal input module is used for receiving a CAN signal input signal, and the CAN signal input module is used for receiving a signal;
the MOS pipe control module: the circuit comprises a first MOS tube and a second MOS tube, wherein the first capacitor is fully filled by calculating a second resistor, a fourth resistor and the first capacitor to match and determining a reasonable pulse number, and the fully filled first capacitor supplies power to the second MOS tube;
MCU link module: the DC/DC power supply module supplies power through VCC and supplies power to the MCU;
the battery management system is awakened after entering deep sleep through the awakening circuit, operation strategy adjustment is carried out according to a power grid, load, stored energy and electricity price, and system operation optimization and user income maximization are achieved.
2. The optical coupling switch dormancy awakening circuit of low-voltage household energy storage system according to claim 1, characterized in that: the first capacitor is an electric storage capacitor, a second capacitor is further arranged in the MOS tube control module, the second capacitor is a filter capacitor, the first resistor is a current-limiting resistor, and the second resistor and the fourth resistor are peripheral resistors and are used for controlling response time of circuit awakening.
3. The optical coupling switch dormancy awakening circuit of low-voltage household energy storage system according to claim 1, characterized in that: when the MCU supplies power through the DC/DC power supply module, the MCU is started, meanwhile, the MCU dormancy control pin is pulled down, the MCU releases the dormancy state, and the MCU is normally started.
4. The optical coupling switch dormancy awakening circuit of low-voltage household energy storage system according to claim 4, characterized in that: and when the MCU needs to sleep, the MCU sleep control pin is released.
5. The optical coupling switch dormancy awakening circuit of low-voltage household energy storage system according to claim 1, characterized in that: the energy storage system for managing the low-voltage users comprises an energy storage system, a household load, a battery, an electric meter, a cloud monitor and a power grid, wherein the energy storage system comprises a solar panel.
6. The optical coupling switch dormancy awakening circuit of low-voltage household energy storage system according to claim 5, characterized in that: the system for managing the low-voltage user energy storage can be applied to houses, public facility places and small factories.
7. A sleep awakening method for an optical coupling switch of a low-voltage household energy storage system is characterized by comprising the following steps: the optical coupling switch dormancy awakening circuit of the low-voltage household energy storage system adopts the optical coupling switch dormancy awakening method as follows:
s1: the CAN signal input module detects and detects an external signal, and when a CAN signal is input, an optocoupler switch in the optocoupler conduction module is conducted;
s2: after the optical coupling switch is switched on, the VCC charges the first capacitor, and the first MOS tube is switched on when the first capacitor is charged to more than 75% of electric quantity;
s3: after the first MOS tube is conducted, the source electrode level of a second MOS tube is pulled down, the second MOS tube is conducted at the moment, VCC supplies power to a DC/DC power supply module, and the DC/DC power supply module supplies power to the MCU;
s4: starting the MCU after the MCU is powered on, wherein the dormant pin of the MCU is pulled down, the MCU is released from dormancy, and the MCU is started;
s5: and when the MCU dormancy control pin is released, the MCU enters a dormancy state.
8. The optical coupling switch dormancy awakening method of the low-voltage household energy storage system according to claim 7, characterized in that: when the management low-voltage user energy storage system is in a deep sleep state, the optical coupling switch and a circuit at the right end of the optical coupling switch are in a power-off state, the awakening mode is communication information through the CAN, when data messages exist, the CANH/CANL has a pulse type high level, and when no communication exists, the optical coupling switch and the circuit are in a low level.
9. The optical coupling switch dormancy awakening method of the low-voltage household energy storage system according to claim 8, characterized in that: when the CAN signal input module has data communication, the problem of inconsistent electric potentials at two ends is solved by a pulse type high level through an optical coupling switch, meanwhile, a first resistor for limiting current is added at the front end to ensure that the output high level and the output low level are in a safety range, at the moment, a first capacitor at the front end of a first MOS (metal oxide semiconductor) tube is charged, the first MOS tube cannot be conducted due to the fact that one pulse signal is too short in time, and the capacitor is fully charged by determining the pulse quantity through system calculation and matching of a peripheral second resistor, a peripheral fourth resistor and a first capacitance value.
10. The optical coupling switch dormancy awakening method of the low-voltage household energy storage system according to claim 8, characterized in that: when the first capacitor is fully charged, enough electric quantity is provided for the conduction of the first MOS tube, the first MOS tube conducts the second MOS tube, after the second MOS tube conducts, the DC/DC power supply module of the power supply part of the MCU of the system is started, the system is awakened at the moment, and after the system is awakened, the MCU is supported by another MCU power supply circuit to supply power.
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Application publication date: 20210831 |