CN106877450A - A kind of family energy-storage system low battery control method - Google Patents
A kind of family energy-storage system low battery control method Download PDFInfo
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- CN106877450A CN106877450A CN201710207885.6A CN201710207885A CN106877450A CN 106877450 A CN106877450 A CN 106877450A CN 201710207885 A CN201710207885 A CN 201710207885A CN 106877450 A CN106877450 A CN 106877450A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 223
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000011217 control strategy Methods 0.000 claims abstract description 38
- 230000005059 dormancy Effects 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims abstract description 13
- 230000009467 reduction Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 16
- 238000007689 inspection Methods 0.000 claims description 16
- 230000002159 abnormal effect Effects 0.000 claims description 12
- 230000005856 abnormality Effects 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000007958 sleep Effects 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007306 turnover Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 8
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Classifications
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Abstract
The invention provides a kind of family energy-storage system low battery control method, using the control strategy more segmented in low battery, the Low Power Mode of energy-storage system is divided into holding state and resting state, the gradually reduction of voltage in the standby state according to energy-storage system simultaneously, it is divided into different voltage ranges, different voltage ranges uses different control strategies, and system is in different states, and the stand-by power consumption of system is reduced step by step.Energy-storage system in a dormant state when, each modular circuit is stopped, dormancy power consumption is reduced to minimum, it is that the global transport of product and turnover stock win more times, while in production, transport and storage than at least 30 times of stand-by power consumption reduction, can be with less electricity during product export, cost has been saved, and the reduction of system carried charge improves the security of transport and the storage of product, therefore low battery control strategy of the present invention has bigger practical significance.
Description
Technical field
The invention belongs to energy source use control technology field, more particularly to a kind of family energy-storage system low battery controlling party
Method.
Background technology
At present, energy-storage system as forward position energy storage technology, with photovoltaic, the development of wind power generation industry, in photovoltaic, wind
Application in the systems such as power generating, power grid frequency modulation is more and more extensive.The large-scale application of energy-storage system, particularly family energy storage system
A kind of form united as energy-storage system, at home and abroad develops very fast for nearly 2 years.Family is smaller with energy-storage system scale, stored energy capacitance
General family energy-storage system flexible configuration is easy for installation between 2kWh to 20kWh, is adapted to the terminal visitor in units of family
Family uses.It is that the development of new energy energy-storage system has great reality as increasing domestic consumer installs energy-storage system
Meaning.
Family energy-storage system industry, just rises, and is in the booming phase, at present, using energy-storage battery in low battery
Processing mode, usually system save electric energy under Low Power Mode using standby pattern, and now system is without output, but respectively
Modular circuit also in normal work, still there is certain stand-by power consumption.
The content of the invention
For above technical problem, the invention discloses a kind of family control method of energy-storage system low battery, using
The control strategy more segmented during low battery, different voltage ranges use different control strategies so that energy-storage system can be with
The electrification time of at least more than 30 times of extension；Simultaneously production, transport and store when, during energy-storage system product export can band more
Few electricity, has saved cost, and the reduction of system carried charge improves the security of transport and the storage of product.
In this regard, the technical solution adopted by the present invention is：
A kind of family control method of energy-storage system low battery, the energy-storage system includes energy-storage battery and battery management system,
The battery management system is controlled according to the voltage of energy-storage battery, when the voltage of energy-storage battery is less than default low battery threshold
During value, the Low Power Mode of the energy-storage battery is divided into standby mode and park mode according to voltage, in the standby state
The gradually reduction of the voltage according to energy-storage battery, is divided into different voltage ranges, and different voltage ranges use different control
Strategy, energy-storage system is in different states, and the stand-by power consumption of energy-storage system is reduced step by step.
Wherein, the standby mode includes the first standby mode and the second standby mode, when battery management system etc. is waiting
The time for receiving data exceedes Preset Time, and energy-storage system enters the first standby mode, and the battery management system control postpones disconnected
Energy-storage system main loop circuit is opened, after delaying to reach preset durations, each submodule is stopped, into park mode；
When the voltage of energy-storage battery is located in the voltage range of the second standby mode, the energy-storage system is in the second standby mould
Formula, voltage range control system interruption of the battery management system according to residing for exports or enters park mode, performs standby
When, after closing the output arrival scheduled time, and the time of normal output regulation, close and export and normal output alternate run；
Wherein, voltage threshold of the voltage threshold of second standby mode less than the first standby mode；
When the energy-storage system is in park mode, main loop disconnects, without output, the battery management system and other moulds
Block is also stopped and could be started shooting, it is necessary to pass through manual intervention.
As a further improvement on the present invention, the park mode is divided into first and is stopped according to the voltage condition of energy-storage battery
Sleep mode and the second park mode, it is necessary to artificial start shooting or receive external charging signal when in first park mode
Afterwards, system can be reawaked；During second park mode, output is closed, while each modular circuit is stopped, only received
To after external charging signal, system can be reawaked；The voltage threshold of second park mode less than the first standby mode and
The voltage threshold of the second standby mode.
As a further improvement on the present invention, when the voltage of energy-storage battery is located in the voltage range of the second standby mode
When, the energy-storage system is in the second standby mode, voltage range control energy storage system of the battery management system according to residing for
System interruption exports or enters the second park mode, when performing standby, after closing the output arrival scheduled time, and normal output regulation
Time, close output and normal output alternate run.
As a further improvement on the present invention, second standby mode is divided into first voltage according to the setting of specific voltage
Interval standby mode and second voltage interval standby mode, it is described when the voltage of the energy-storage battery is located at first voltage interval
Energy-storage system is in first voltage interval standby mode, and the battery management system first closes output, enters line delay and waits predetermined
After time, control interruption output after receiving external charging signal, enters back into startup self-detection；
When the voltage of the energy-storage battery is located at second voltage interval, the energy-storage system is in the interval standby mould of second voltage
Formula, the battery management system first closes output, if any artificial starting-up signal, then interruption output is carried out, until receiving outside
After charging signals, system can be reawaked, and enter back into startup self-detection.
The interruption is output as closing after output reaches the scheduled time, and the time of normal output regulation, close output and
Normal output alternate run.
As a further improvement on the present invention, when energy-storage system occurs abnormal in normal condition, energy-storage system is exited just
Normal working condition, into abnormal patterns, under the abnormal patterns, system reenters startup self-detection, according to residing abnormal feelings
Condition, the voltage condition of energy-storage system enter different mode states.As a further improvement on the present invention, the energy-storage system is also
Including photovoltaic battery panel, energy storage inverter, alternating-current controller, the energy-storage battery is connected with battery management system, the energy storage
Battery is connected by battery management system with energy storage inverter, and the energy storage inverter connects with photovoltaic battery panel, alternating-current controller
Connect, the alternating-current controller is connected with outside electric power network or load.
As a further improvement on the present invention, it is comprised the following steps：
Step S1：After the energy-storage system start, system electrification, the battery management system carries out self-inspection to energy-storage battery, first
External line polarity reversal connection inspection is first carried out, after without exception, closure precharging circuit switch, open system precharge function；
Step S2：System electrification self-inspection is finished, and battery management system is communicated with energy storage inverter, by battery management system etc.
The data that energy storage inverter to be received is sended over, now have two kinds of following situations：
After battery management system receives the data of energy storage inverter, both set up communication, and energy-storage battery can close major loop
Circuit, and precharging circuit is disconnected, into System self-test；
When battery management system waits the time of the data of energy storage inverter transmission to exceed Preset Time, energy-storage battery enters first
Standby mode；
Step S3：Energy-storage system self-inspection, the battery management system carries out self-inspection to the direct current total voltage and SOC of energy-storage battery,
When the direct current total voltage of energy-storage battery is less than or equal to preset value, or any one section of single battery less than or equal to preset value, SOC
Voltage be less than or equal to preset value when, system enter the second standby mode；Direct current total voltage, SOC or single-unit when energy-storage battery
In the case that the voltage of any one section of battery is outside the afore-mentioned, system enters normal operating conditions；
Step S4：After system enters normal operating conditions, battery management system carries out direct current total voltage, monomer electricity to energy-storage battery
The real-time monitoring of cell voltage, total current and temperature, when exception or battery management system and energy storage inverter occurs in arbitrary parameter
Communicating interrupt, when being unsatisfactory for normal operating conditions condition, system exits normal operating conditions, into abnormality, when system is entered
When entering abnormality, startup self-detection is reentered, the voltage condition according to abnormal conditions and energy-storage battery enters different moulds
Formula；
Step S5：When energy-storage system enters the first standby mode, now battery management system disconnects major loop, whole energy-storage system
Without output, other circuit modules still normal work, while timing starts, battery management system enters next delay switching-off ring
Section；
Under delay switching-off link, energy-storage system keeps system without output, and battery management system timing reaches preset value, and closing is led back
Road, into the first park mode；Now power consumption is extremely low, dormancy power consumption than under standby mode 1 it is small more than 30 times.In the pattern
Under, battery management system keeps each submodule to be stopped state；When artificial shift knob of opening gives system one starting-up signal
Or during outside access charger, battery management system is waken up, and reenters startup self-detection, enter different according to different situations
Pattern；
Step S6：When energy-storage system enters the second standby mode, system has interruption output work according to different voltage ranges
Or major loop can be disconnected, without output；It is standby that second standby mode is divided into first voltage interval according to the voltage of energy-storage battery
Pattern, second voltage interval standby mode and the second park mode, wherein, the voltage threshold of first voltage interval standby mode
Value>The voltage threshold of second voltage interval standby mode>The voltage threshold of the second park mode；Battery management system is to energy storage electricity
The total voltage and single battery voltage detecting in pond, different voltage ranges is belonged to according to the electrical voltage point for detecting, into corresponding
Pattern.
As a further improvement on the present invention, in step S6, when the total voltage of energy-storage battery is interval default in first voltage
In the single battery values of first voltage interval, now energy-storage system enters first for value scope or single battery voltage
Voltage range standby mode；
When the total voltage of energy-storage battery is interval single in first voltage in first voltage interval values or single battery voltage
In batteries values, now energy-storage system enters first voltage interval standby mode；When the total voltage of energy-storage battery exists
Second voltage interval values or single battery voltage in the single battery values of second voltage interval, now
Energy-storage system enters second voltage interval standby mode；
When the total voltage of energy-storage battery is electric in the second dormancy single-unit in the second dormancy voltage values or single battery voltage
In the values of pond, now energy-storage system enters the second park mode.
As a further improvement on the present invention, for 48V energy-storage systems, first voltage interval values are：
Total voltage >=the 40V of 42V ＞ energy-storage batteries, first voltage interval single battery values are：2.65 >=single-unit electricity
Pond >=2.5V；
Second voltage interval values are：Total voltage >=the 32V of 40V ＞ energy-storage batteries, the second voltage is interval
Single battery values are：2.5V ＞ single batteries >=2.0V；
The second dormancy voltage values are the total voltage of energy-storage battery<32V, the second dormancy single battery is preset
Value scope is the voltage of single battery<2.0V.
Compared with prior art, beneficial effects of the present invention are：
First, using technical scheme, the control strategy of system running pattern is further segmented, in system low battery
In the case of, holding state and resting state have been segmented according to the in running order power consumption of system；By segmenting low battery feelings
Working condition under condition, system control strategy more rationally and optimizes；And energy-storage system low battery control strategy, be system from
Dynamic operation, it is laborsaving, save trouble, save worry without other accessory operations.
Second, using technical scheme, by energy-storage system low battery control strategy, in the standby state, electricity
Pond management system interruption opens precharging circuit, the reduction of system consumption electric energy, more power saving, while extending stand-by time；By energy storage
System low battery control strategy, in the dormant state, system stored energy battery compartment enters park mode, and power dissipation ratio holding state is small
30 to 40 times, more power saving, it is meant that system identical electricity, the electrification time that at least more than 30 times can be extended of system.
3rd, technical scheme greatly reduces energy-storage system electricity by energy-storage system low battery control strategy
The probability of pond emptying, while reducing after-sales service cost；For more times are won in the whole world transport and stock's turnover of product；
And in production, transport and storage, it is possible to reduce the electricity of institute's band during product export, save cost；Reduce product export
When carried charge while, improve the security of transport and the storage of product.
Brief description of the drawings
Fig. 1 is the Organization Chart of family energy-storage system of the invention.
Fig. 2 is energy-storage system main control policy logic figure of the invention.
Fig. 3 is the logic chart of energy-storage system of the invention i.e. the first Low Power Mode of sub- control strategy 1.
Fig. 4 is the logic chart of energy-storage system of the invention i.e. the second Low Power Mode of sub- control strategy 2.
Fig. 5 is the interval control strategy logic chart of first voltage of the invention.
Fig. 6 is the interval control strategy logic chart of second voltage of the invention.
Fig. 7 is the second resting state control strategy logic chart of the invention.
Specific embodiment
Preferably embodiment of the invention is described in further detail below.
Family system solution of the present invention describes the ruuning situation of system in detail in terms of energy-storage system control strategy,
Such as the start level self-inspection of system, normal operating condition, abnormality, holding state and resting state, are elaborated as follows.
1st, energy-storage system composition
As indicated with 1, the energy-storage system also includes photovoltaic battery panel, storage to the structured flowchart of the family energy-storage system of the technical program
Energy inverter, alternating-current controller, energy-storage battery, the energy-storage battery are connected with battery management system BMS, and the energy-storage battery leads to
Cross battery management system BMS to be connected with energy storage inverter, the energy storage inverter is connected with photovoltaic battery panel, alternating-current controller,
The alternating-current controller is connected with outside electric power network or load.The energy-storage system of the present embodiment is the system of 48V.
2nd, control strategy
This programme energy-storage system control strategy can be divided into a main control strategy and two sub- control strategies, wherein described two sons
Control strategy is Low Power Mode control strategy, and such as Fig. 2 ~ Fig. 4, the first Low Power Mode in Fig. 2 corresponds to the first holding state,
The second holding state of the second Low Power Mode correspondence.
Main control strategy according to energy-storage system, energy-storage system has following several working conditions.
2.1 normal operating conditions
System is in normal work, the output with stabilization；
2.2 Low Power Modes
There are two kinds of working conditions, respectively holding state and resting state under Low Power Mode；
2.3 holding states
Holding state is divided into two kinds of situation of the first holding state and the second holding state
（1）First holding state
Postpone to disconnect main loop circuit, follow procedure control execution is standby, each submodule work is stopped after postponing certain hour；
（2）Second holding state
Interruption output, follow procedure control execution is standby, after closing output certain hour, normally exports the regular hour, alternately transports
OK；
2.4 resting states
Main loop disconnects, and without output, other modules such as BMS and power supply are also stopped, it is necessary to pass through manual intervention ability
Start.Resting state is divided into two kinds of situation of the first resting state and the second resting state
（1）First resting state
In this case, it is necessary to after artificially starting shooting or access charger, system can be reawaked.
（2）Second resting state
In this case, it is necessary to after charger is accessed, system can be reawaked.
2.5 abnormalities
System occurs exception in normal condition, normal operating conditions is exited, into abnormality.
3rd, energy-storage system main control strategy is described in detail
As shown in Fig. 2 since system boot, energy-storage system main control strategy is described in detail as follows.
3.1st, system boot
Manually start shooting, the shift knob of energy-storage system, system boot are pressed with hand.
Explanation：Hand switch button, under shutdown, holding state and the first resting state all effectively, can normal boot-strap.
3.2nd, startup self-detection
After energy-storage system start, system electrification, the energy-storage battery part to system carries out self-inspection, line polarity external first
Reversal connection check, it is without exception after, closure precharging circuit switch, open system precharge function.
3.3rd, system communication
System electrification self-inspection is finished, and the BMS of energy-storage battery part is communicated with inverter, by the energy storage inversion to be received such as BMS
The data that device is sended over, now have two kinds of situations.
1. after BMS receives the data of energy storage inverter, both set up communication, and the energy-storage battery part of system can close
Main loop circuit, and precharging circuit is disconnected, into System self-test；
2. when BMS waits the data that energy storage inverter sends, more than Preset Time 2 minutes（Time can be set）, the energy storage of system
Battery compartment can enter the first Low Power Mode.
3.4th, System self-test
Energy-storage system self-inspection, direct current total voltage and SOC to energy-storage battery part carry out self-inspection, now have two kinds of situations.
1., when system detectio direct current total voltage is less than or equal to preset value 42V（It is settable）, SOC be less than or equal to preset value 5%
（It is settable）, or any one section of single battery voltage be less than or equal to preset value 2.65V（It is settable）When, system stored energy battery unit
Branch enters the second Low Power Mode；
2., when the situation of the voltage outside the first situation of system detectio direct current total voltage, SOC or any one section of single battery
Under, system enters normal operating conditions.
3.5th, normal operating conditions
After system enters normal operating conditions, energy-storage system opens direct current total voltage, monomer battery voltage, total current and temperature
Real-time monitoring, when abnormal, or BMS and energy storage inverter communicating interrupt occurs in arbitrary parameter, be unsatisfactory for normal operating conditions
During condition, system exits normal operating conditions, into abnormality.
3.6th, abnormality
When system enters system mode, startup self-detection can be reentered, different sub- control strategies is entered according to abnormal conditions.
4th, the sub- control strategy 1 of energy-storage system（First Low Power Mode）Control strategy is described in detail
According to the sub- control strategy 1 of energy-storage system as shown in Figure 3（First electricity pattern）Logic chart, is described in detail as follows.
4.1st, the first holding state
Energy-storage system enters sub- control strategy 1 from main control strategy（First Low Power Mode）When, initially enter under this pattern
First holding state, when energy-storage system be in holding state, now system disconnect major loop, system without output, other circuit moulds
Block still normal work, while timing starts, system enters next delay switching-off link.
4.2nd, delaying shutdown
Energy-storage system keeps system without output, and system timing reaches preset value 5 minutes（It is settable）, major loop is closed, into the
One resting state.
4.3rd, the first resting state
In the case of the first resting state, system keeps each submodule to be stopped state to energy-storage system, and now power consumption is extremely low,
Dormancy power consumption than under standby mode 1 it is small more than 30 times.
4.4th, dormancy awakening
Energy-storage system is in the case of the first resting state, when artificial shift knob of opening is to one starting-up signal of system or outer
Portion accesses charger, and now system can be waken up under the first resting state, reenter startup self-detection, be entered according to different situations
Enter different control strategies.
5th, the sub- control strategy 2 of energy-storage system（Second Low Power Mode）Control strategy is described in detail
As shown in figure 4, when energy-storage system enters the second Low Power Mode, in the second holding state, now system disconnection master
Loop, inactivity output.Voltage range under second holding state is divided into 3 intervals, respectively first voltage by control strategy
Interval, second voltage interval and the second resting state.Energy-storage system to battery total voltage and single battery voltage detecting, according to inspection
The electrical voltage point for measuring belongs to different voltage ranges, into corresponding operating mechanism.
5.1st, first voltage is interval
When energy-storage system detects system total voltage in values 42V ＞ U1≥40V（Scope can be set）, or single battery
Voltage is in values 2.65V >=U1X≥2.5V（Scope can be set）Interior, now system enters first voltage range restraint plan
Slightly, as shown in Figure 5.
（1）Close output
After energy-storage system enters first voltage range restraint strategy, first, BMS disconnects the main loop circuit of energy-storage battery, closes
After output, next step time delay wait is subsequently entered.
（2）Time delay is waited
When time delay is waited, main circuit loop can be held off a period of time to energy-storage system, start simultaneously at timing, this programme shut-off
Time preset value is 1 hour（Time can be set）, when BMS detects the turn-off time to be met 1 hour, system enters into next step
Interruption output, otherwise continues waiting for, until meeting the stand-by period.
（3）Interruption output
When energy-storage system enters interruption output, main circuit loop can be closed and kept for a period of time, start simultaneously at timing, this programme
Interruption output time preset value is 5 minutes（Time can be set）, after system interruption output meets to be required, if having in the process
External charger is accessed, and system enters into external charging between next step, otherwise returns to closing output node.
（4）External charging
When artificially external charger access system, or the photovoltaic charged function of energy storage inverter is opened, energy-storage system is opened
Charge function, while into startup self-detection, otherwise returning to closing output node.
5.2nd, second voltage is interval
When energy-storage system detects system total voltage in values 40V ＞ U2≥32V（Scope can be set）, or single battery
Voltage values 2.5V ＞ U2X≥2.0V（Scope can be set）Interior, now system enters second voltage range restraint strategy,
As shown in Figure 6.
（1）, close output
After energy-storage system enters second voltage range restraint strategy, BMS disconnects the main loop circuit of energy-storage battery, closes output.
Now system charge is very low, need to can just be turned back on by human intervention, or outside access charger and energy storage inverter
Photovoltaic charged function open and can also turn back on, when the entrance next step that system is turned back on by shift knob is started shooting letter
Number, and pass through that when accessing external charger or the energy storage inverter photovoltaic charged function of unlatching external charging can be directly entered.
（2）, starting-up signal
In starting-up signal, the power on button that need to press energy-storage system by human intervention can just be turned back on energy-storage system, be
After system start, next step can be entered and be interrupted output.
（3）, interruption output
When energy-storage system enters interruption output, main circuit loop can be closed and kept for output a period of time, start simultaneously at timing, this
Scheme interruption output time preset value is 5 minutes（Time can be set）, after system interruption output meets to be required, if in this process
In there is external charger to access, system enters into external charging between next step, otherwise returns to closing output node.
（4）, external charging
When artificially external charger access system, or the photovoltaic charged function of energy storage inverter is opened, energy-storage system is opened
Charge function, while into startup self-detection, otherwise returning to closing output node.
5.3rd, the second resting state
When energy-storage system detects system total voltage in values 32V ＞ U3（Scope can be set）, or single battery voltage
Values 2.0V ＞ U3X（Scope can be set）Interior, now system enters the second resting state, as shown in Figure 7.
In the case of the second resting state, energy-storage system disconnects the main loop circuit of energy-storage battery to energy-storage system, closes defeated
Go out, while each modular circuit is stopped, now dormancy power consumption reaches minimum, then under this state, outside can only be connect by artificial
Enter charger, or the photovoltaic charged function of energy storage inverter is opened, energy-storage system can just be turned back on, and open charge function, together
When enter startup self-detection, otherwise continue keep the second resting state.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
Specific implementation of the invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should be all considered as belonging to of the invention
Protection domain.
Claims (9)
1. a kind of family energy-storage system low battery control method, the energy-storage system includes energy-storage battery and battery management system,
It is characterized in that：The battery management system is controlled according to the voltage of energy-storage battery, when the voltage of energy-storage battery is less than pre-
If low battery threshold value when, the Low Power Mode of the energy-storage battery is divided into standby mode and park mode according to voltage,
The gradually reduction of the voltage according to energy-storage battery in the standby state, is divided into different voltage ranges, and different voltage ranges are adopted
With different control strategies, energy-storage system is in different states, and the stand-by power consumption of energy-storage system is reduced step by step.
2. family according to claim 1 energy-storage system low battery control method, it is characterised in that：The standby mode bag
The first standby mode and the second standby mode are included, Preset Time, storage are exceeded when the time of the data to be received such as battery management system
Energy system enters the first standby mode, and the battery management system control postpones to disconnect energy-storage system main loop circuit, is deferred to
Up to after preset durations, each submodule is stopped, into park mode；
When the voltage of energy-storage battery is located in the voltage range of the second standby mode, the energy-storage system is in the second standby mould
Formula, voltage range control energy-storage system interruption of the battery management system according to residing for is exported or enters park mode, is performed
When standby, close after exporting the arrival scheduled time, and the time of normal output regulation, closing is exported and normal output replaces fortune
OK；
Wherein, voltage threshold of the voltage threshold of second standby mode less than the first standby mode；
When the energy-storage system is in park mode, main loop disconnects, without output, the battery management system and other moulds
Block is also stopped and could be started shooting, it is necessary to pass through manual intervention.
3. family according to claim 2 energy-storage system low battery control method, it is characterised in that：The park mode root
The first park mode and the second park mode are divided into according to the voltage condition of energy-storage battery, when in first park mode
When, it is necessary to it is artificial start shooting or receive external charging signal after, system can be reawaked；During second park mode, close defeated
Go out, while each modular circuit is stopped, only after external charging signal is received, system can be reawaked；Described second stops
The voltage threshold of sleep mode is less than the first standby mode and the voltage threshold of the second standby mode.
4. family according to claim 3 energy-storage system low battery control method, it is characterised in that：The second standby mould
Formula is divided into first voltage interval standby mode and second voltage interval standby mode, the energy storage electricity according to the setting of specific voltage
When the voltage in pond is located at first voltage interval, the energy-storage system is in first voltage interval standby mode, the battery management
System first closes output, after entering the line delay wait scheduled time, control interruption output, and after receiving external charging signal,
Enter back into startup self-detection；
When the voltage of the energy-storage battery is located at second voltage interval, the energy-storage system is in the interval standby mould of second voltage
Formula, the battery management system first closes output, if any artificial starting-up signal, then interruption output is carried out, until receiving outside
After charging signals, system can be reawaked, and enter back into startup self-detection.
5. family according to claim 4 energy-storage system low battery control method, it is characterised in that：When energy-storage system is just
When normal state occurs abnormal, energy-storage system exits normal operating conditions, into abnormal patterns, under the abnormal patterns, and system weight
Newly enter startup self-detection, the voltage condition according to residing abnormal conditions and energy-storage system enters different mode states.
6. family according to claim 5 energy-storage system low battery control method, it is characterised in that：The energy-storage system is also
Including photovoltaic battery panel, energy storage inverter, alternating-current controller, the energy-storage battery is connected with battery management system, the energy storage
Battery is connected by battery management system with energy storage inverter, and the energy storage inverter connects with photovoltaic battery panel, alternating-current controller
Connect, the alternating-current controller is connected with outside electric power network or load.
7. family according to claim 6 energy-storage system low battery control method, it is characterised in that：It includes following step
Suddenly：
Step S1：After the energy-storage system start, system electrification, the battery management system carries out self-inspection to energy-storage battery, first
External line polarity reversal connection inspection is first carried out, after without exception, closure precharging circuit switch, open system precharge function；
Step S2：System electrification self-inspection is finished, and battery management system is communicated with energy storage inverter, by battery management system etc.
The data that energy storage inverter to be received is sended over, now have two kinds of following situations：
After battery management system receives the data of energy storage inverter, both set up communication, and energy-storage battery can close major loop
Circuit, and precharging circuit is disconnected, into System self-test；
When battery management system waits the time of the data of energy storage inverter transmission to exceed Preset Time, energy-storage battery enters first
Standby mode；
Step S3：Energy-storage system self-inspection, the battery management system carries out self-inspection to the direct current total voltage and SOC of energy-storage battery,
When the direct current total voltage of energy-storage battery is less than or equal to preset value, or any one section of single battery less than or equal to preset value, SOC
Voltage be less than or equal to preset value when, system enter the second standby mode；Direct current total voltage, SOC or single-unit when energy-storage battery
In the case that the voltage of any one section of battery is outside the afore-mentioned, system enters normal operating conditions；
Step S4：After system enters normal operating conditions, battery management system carries out direct current total voltage, monomer electricity to energy-storage battery
The real-time monitoring of cell voltage, total current and temperature, when exception or battery management system and energy storage inverter occurs in arbitrary parameter
Communicating interrupt, when being unsatisfactory for normal operating conditions condition, system exits normal operating conditions, into abnormality, when system is entered
When entering abnormality, startup self-detection is reentered, the voltage condition according to abnormal conditions and energy-storage battery enters different moulds
Formula；
Step S5：When energy-storage system enters the first standby mode, now battery management system disconnects major loop, whole energy-storage system
Without output, other circuit modules still normal work, while timing starts, battery management system enters next delay switching-off ring
Section；
Under delay switching-off link, energy-storage system keeps system without output, and battery management system timing reaches preset value, and closing is led back
Road, into the first park mode；
In this mode, battery management system keeps each submodule to be stopped state；When artificial shift knob of opening is to system
When one starting-up signal or outside access charger, battery management system is waken up, and reenters startup self-detection, according to difference
Situation enters different patterns；
Step S6：When energy-storage system enters the second standby mode, system has interruption output work according to different voltage ranges
Or major loop can be disconnected, without output；It is standby that second standby mode is divided into first voltage interval according to the voltage of energy-storage battery
Pattern, second voltage interval standby mode and the second park mode, wherein, the voltage threshold of first voltage interval standby mode
Value>The voltage threshold of second voltage interval standby mode>The voltage threshold of the second park mode；Battery management system is to energy storage electricity
The total voltage and single battery voltage detecting in pond, different voltage ranges is belonged to according to the electrical voltage point for detecting, into corresponding
Pattern.
8. family according to claim 7 energy-storage system low battery control method, it is characterised in that：In step S6, work as storage
The total voltage of energy battery is pre- in first voltage interval single battery in first voltage interval values or single battery voltage
If in the range of value, now energy-storage system enters first voltage interval standby mode；
When the total voltage of energy-storage battery is interval single in first voltage in first voltage interval values or single battery voltage
In batteries values, now energy-storage system enters first voltage interval standby mode；When the total voltage of energy-storage battery exists
Second voltage interval values or single battery voltage in the single battery values of second voltage interval, now
Energy-storage system enters second voltage interval standby mode；
When the total voltage of energy-storage battery is electric in the second dormancy single-unit in the second dormancy voltage values or single battery voltage
In the values of pond, now energy-storage system enters the second park mode.
9. family according to claim 8 energy-storage system low battery control method, it is characterised in that：For 48V energy storage system
Unite, first voltage interval values are：Total voltage >=the 40V of 42V ＞ energy-storage batteries, the first voltage is interval single
Batteries values are：2.65 >=single battery >=2.5V；
Second voltage interval values are：Total voltage >=the 32V of 40V ＞ energy-storage batteries, the second voltage is interval
Single battery values are：2.5V ＞ single batteries >=2.0V；
The second dormancy voltage values are the total voltage of energy-storage battery<32V, the second dormancy single battery is preset
Value scope is the voltage of single battery<2.0V.
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| CN110690721A (en) * | 2019-08-30 | 2020-01-14 | 阳光电源股份有限公司 | Starting-up self-detection method of energy storage system and application device and system thereof |
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Denomination of invention: A Low Battery Control Method for Household Energy Storage Systems Granted publication date: 20190628 Pledgee: Shanghai Pudong Development Bank Co.,Ltd. Shenzhen Branch Pledgor: BST POWER (SHENZHEN) Ltd. Registration number: Y2024980007457 |
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