CN109245214A - Communication base station multichannel based on competition mechanism uses battery manager with - Google Patents
Communication base station multichannel based on competition mechanism uses battery manager with Download PDFInfo
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- CN109245214A CN109245214A CN201811130486.5A CN201811130486A CN109245214A CN 109245214 A CN109245214 A CN 109245214A CN 201811130486 A CN201811130486 A CN 201811130486A CN 109245214 A CN109245214 A CN 109245214A
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- power supply
- lithium battery
- bus
- supply unit
- battery power
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- 238000004891 communication Methods 0.000 title claims abstract description 61
- 230000007246 mechanism Effects 0.000 title claims abstract description 47
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 221
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 221
- 239000002253 acid Substances 0.000 claims abstract description 58
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 5
- 230000001447 compensatory effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 238000007667 floating Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
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- H02J7/0022—
-
- H02J7/045—
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
Abstract
A kind of mixed battery manager of the communication base station multichannel based on competition mechanism, including Switching Power Supply, load of base station, lead-acid battery group, multiple lithium battery power supply units, DC bus, each lithium battery power supply unit is independent lithium battery power supply unit, it does not communicate to connect each other, independent detection DC bus-bar voltage and independent control are discharged each by DC bus；By alternating current through Switching Power Supply it is that load of base station powers and is that lead-acid battery group and lithium battery power supply unit charge in mains-supplied, so that multiple lithium battery power supply units is followed successively by load of base station and lead-acid battery group power supply by competition mechanism in alternating current power loss；Realization is preferentially discharged by lithium battery group in the case where alternating current power loss; the charge and discharge number for reducing lead-acid battery carries out sufficient echelon utilization to retired dynamic lithium battery, and extends lead-acid battery service life; to reach protection lead-acid battery group, and guarantee communication base station stable operation.
Description
Technical field
The invention belongs to communication base station energy-storage battery technical fields, and in particular to a kind of communication base station based on competition mechanism
Multichannel uses battery manager with.
Background technique
As use of the people to mobile communication equipments such as mobile phones is further extensive, lead to as mobile radio communication is completed with mobile
Radio station is believed in the transceiving of communication and management function between credit household, the long-time low cost stable operation of communication base station at
For an important research and development project.And for communication base station, base station equipment failure is largely that base station interior power occurs
Problem, so guaranteeing that communication base station equipment is not interrupted, not because power failure influence becomes operator and master because of mains failure
The problem of equipment vendor must be taken into consideration.
In order to realize that communication base station does not generate failure because of mains failure, battery becomes in communication base station power supply system
Important component.Communication base station can be summarized as long service life and highly-safe for the basic demand of battery feed,
Should also have on this basis and the characteristics such as convenient, non-maintaining are installed.In current existing technology and design scheme, plumbic acid is often selected
Backup power source of the battery as communication base station, however lead-acid battery prominent question is exactly that its service life is short, domestic list
It is 5 to 8 years that body 12V lead-acid battery, which designs float life, and the lead-acid battery of communication base station was just needed replacing using 2 to 3 years.Plumbic acid
The quick aging of battery be primarily due to base station frequently have a power failure, power off time it is long, not only make the frequent charge and discharge of battery, it is also possible to
It causes to occur charge less because also underfill electricity just discharges again after lead-acid battery electric discharge, lose lead-acid battery capacity cumulative bad.
Therefore, lead-acid battery is protected, quotes other backup power sources on the basis of lead-acid battery application to reduce lead-acid battery charge and discharge
The mentality of designing of cycle-index is come into being.
The design side that the retired dynamic lithium battery echelon occurred based on this thinking is utilized, powered after communication base station
Case, can alleviate the frequent charge and discharge electric defect of lead-acid battery to a certain extent really, but cause other defect, such as lithium
Battery power discharge is difficult to be scheduled, part lithium battery group is caused to consume excessively, and the communication of responsible management lithium battery electric discharge is total
Line wiring quantity is more, internal system wiring is complicated, lithium battery group is difficult to increase or decrease etc. maintenance work, and communication is always
Line failure, which may cause lithium battery group under alternating current power failure state and cannot power, cause communication base station power supply system stability difference etc., asks
Topic.
Summary of the invention
It is an object of the invention in view of the above-mentioned problems, proposing a kind of mixed electricity of the communication base station multichannel based on competition mechanism
Pool manager, from the angle of retired dynamic lithium battery group usage mode, by the discharge mode of several lithium battery groups and each other
Independent delay setting combines, the scheduling feature for replacing communication bus to discharge lithium battery group using competition mechanism, to solve
Communication base station lead-acid battery charge and discharge cycles are more, part lithium battery group consumes excessively, internal system wiring is complicated, communication bus is anti-
The problems such as interference performance difference causes communication base station power supply system stability poor reduces the cost of communication base station operation and maintenance, more preferably
Ground guarantees the stable operation of communication base station low cost.
The technical scheme adopted by the invention is as follows:
A kind of mixed battery manager of the communication base station multichannel based on competition mechanism, including Switching Power Supply, load of base station, lead
Sour battery pack, multiple lithium battery power supply units, DC bus, the Switching Power Supply input terminal are electrically connected with city, output end and straight
It flows bus to be connected, DC bus is connected with load of base station, lead-acid battery group and multiple lithium battery power supply units, which is characterized in that
Each lithium battery power supply unit is independent lithium battery power supply unit, does not communicate to connect each other, independent detection DC bus
Voltage and independent control are discharged each by DC bus；In mains-supplied by alternating current through Switching Power Supply be load of base station
It powers and is lead-acid battery group and lithium battery power supply unit charging, supply multiple lithium batteries by competition mechanism in alternating current power loss
Electric unit is followed successively by load of base station and lead-acid battery group power supply.
A kind of control method is also provided, which is characterized in that
It is that all lithium battery power supply units charge by DC bus in the presence of alternating current, current lithium battery power supply list
The loop open circuit that member charges lithium battery power supply unit after being full of from DC bus；
In alternating current power loss, lithium battery power supply unit is sequentially ingressed into DC bus by competition mechanism and supplies for DC bus
Electricity, the same time has and only one lithium battery power supply unit is powered；
All lithium battery power supply units be not able to satisfy DC bus need load of base station power demands, at this time again by
Lead-acid battery group is powered for load of base station.
Due to the application of the above technical scheme, compared with prior art, the present invention having following advantages and effect:
1) the communication base station multichannel based on competition mechanism uses battery manager with, can be by successively using lithium battery power supply
Unit is powered in alternating current power loss for load of base station, and the frequency of use of lead-acid battery is substantially reduced, and effectively reduces plumbic acid electricity
The charge and discharge cycles number in pond realizes the extension of lead-acid battery group service life.
2) the communication base station multichannel based on competition mechanism uses battery manager with, can pass through each lithium battery power supply unit
Interior independent delay setting makes the lithium battery power supply unit first discharged in power loss next time, lithium battery power supply unit competition electric discharge
During with very little competitiveness, avoid the same lithium battery power supply unit frequently discharge and have than other lithium batteries supply
The much higher utilization rate of electric unit.
3) the communication base station multichannel based on competition mechanism uses battery manager with, can be avoided single lithium battery power supply unit
In retired dynamic lithium battery performance decay rapidly, balance DC bus on all lithium battery power supply units utilization rate, realize
The approximate service life having the same of retired dynamic lithium battery group in the lithium battery power supply unit of DC bus is accessed with a batch,
Replacement and maintenance work can be uniformly carried out, the operation expense of communication base station power supply system is saved.
4) the communication base station multichannel based on competition mechanism uses battery manager with, can make between each lithium battery power supply unit
It is not necessary to realize that all lithium battery power supply unit wiring are independent of one another using communication bus.
5) the communication base station multichannel based on competition mechanism uses battery manager with, can be supplied by lithium battery independent of each other
Electric unit mode of connection effectively simplifies the wiring work of lithium battery power supply unit access DC bus, solves communication base station power supply
The problem of internal system wiring complexity.
6) the communication base station multichannel based on competition mechanism uses battery manager with, can be by each lithium battery power supply list
It is identical and not by other lithium battery power supply lists by using all lithium battery power supply units on the basis of first independent patch
The competition mechanism of first effect of signals controls program, and the control program for further realizing all lithium battery power supply units being capable of independent work
Make, is not influenced by other other lithium battery power supply units.
7) the communication base station multichannel based on competition mechanism uses battery manager with, can exist in all lithium battery power supply units
On the basis of independence in wiring and control program, realization can be independently accessed additional lithium battery power supply to DC bus
During unit or the existing part lithium battery power supply unit of excision, without the program to other lithium battery power supply units or connect
Line makes any adjustment, to realize that the lithium battery power supply unit number accessed on DC bus can carry out any change according to demand
Change.
Detailed description of the invention
Fig. 1 is that the communication base station multichannel based on competition mechanism uses battery manager electrical schematic with；
Fig. 2 is that the communication base station multichannel based on competition mechanism uses battery manager structural schematic diagram with；
Fig. 3 is switching power supply structure schematic diagram；
Fig. 4 is lithium battery power supply unit internal structure chart；
Current flow diagram when Fig. 5 is mains-supplied；
Current flow diagram when Fig. 6 is alternating current power loss lithium battery power supply；
Fig. 7 is lead-acid battery discharge curve schematic diagram；
Fig. 8 is lithium battery power supply unit hysteresis control electric discharge schematic diagram；
Fig. 9 is non-competition mechanism control flow chart when being all highest gear of delay setting；
Figure 10 is competition mechanism control flow chart when delay setting is all highest gear；
Specific embodiment
The present invention is described further with reference to the accompanying drawing.
Below in conjunction with the attached drawing of the embodiment of the present invention, technical solution in the embodiment of the present invention is described.It is retouched
The embodiment stated is a part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff every other embodiment obtained without making creative work belongs to what the present invention protected
Range.
In order to facilitate understanding of embodiments of the present invention, it is further explained below in conjunction with attached drawing with specific embodiment
Bright, embodiment does not constitute the restriction to the embodiment of the present invention.
Fig. 1 is that the communication base station multichannel based on competition mechanism uses battery manager too many levels collaboration power supply structure block diagram with,
It mainly include alternating current, Switching Power Supply, DC bus, load of base station, lead-acid battery group, lithium battery power supply unit, by by alternating current
Direct current is converted to as the main power supply source in base station, lithium battery power supply unit as energy storage device and preferentially through Switching Power Supply
The high backup power source of grade, the lead-acid battery group backup power source minimum as priority are realized and are guaranteeing that communication base station supplies as far as possible
On the basis of electricity demanding, preferentially use lithium battery power supply unit as backup power source, by successively using lithium battery power supply unit
It powers in alternating current power loss for load of base station, the frequency of use of lead-acid battery is substantially reduced, and effectively reduces lead-acid battery
Charge and discharge cycles number realizes the extension of lead-acid battery group service life, and that improves entire communication base station power supply system uses the longevity
Life realizes the stable operation of communication base station low cost to reduce the operation expense of communication base station power supply aspect.
Fig. 2 is that the communication base station multichannel based on competition mechanism uses battery manager structural schematic diagram with, and main includes switch
Power supply, load of base station, lead-acid battery group, DC bus and several lithium battery power supply units, the Switching Power Supply input terminal and city
It is electrically connected, output end is connected with DC bus, DC bus and load of base station, lead-acid battery group and lithium battery power supply unit phase
Even, wherein the number for the lithium battery power supply unit being connected on DC bus can be adjusted according to communication base station design requirement,
The wiring of lithium battery power supply unit and DC bus connects and to the voltage detecting circuit of DC bus-bar voltage detection in different lithium
Between battery power supply unit independently of one another, it is independent of each other, about the number of lithium battery power supply unit " lithium battery power supply unit 1 " in figure
It is represented Deng only and arbitrarily connects some lithium battery power supply unit on DC bus, do not represent the lithium battery power supply unit in direct current mother
The physical location arrangement information of access sequence or lithium battery power supply unit on line in all lithium battery power supply units.
The Switching Power Supply, as shown in figure 3, including direct current bus voltage detecting circuit, AC/DC converter and its control electricity
Road adjusts control circuit output and controls AC/DC converter, from commercial power rectification by DC bus-bar voltage testing result
Obtain standard compliant DC bus-bar voltage.
The lithium battery power supply unit, as shown in figure 4, including DC/DC converter, retired dynamic lithium battery group, battery pack
Voltage detecting circuit, current detection circuit, battery management system (BMS), direct current bus voltage detecting circuit, DC/DC converter
Two sides are connected with DC bus and retired dynamic lithium battery group respectively, are responsible for converting the voltage output of retired dynamic lithium battery group
To voltage level identical with DC bus.Battery management system is connected with battery voltage detection circuit, current detection circuit,
Data calculate the information such as the state-of-charge of retired dynamic lithium battery group according to testing result, at the same battery management system also with direct current
Busbar voltage detection circuit is connected, and obtains the voltage data of DC bus, judges whether to allow retired power lithium according to decision logic
Battery pack charged by DC bus, it is DC bus powered or cut off from DC bus, and raw according to judging result to be
DC/DC converter is controlled at control signal.
Fig. 5 is current flow diagram under mains-supplied, as shown, in the case where mains-supplied, DC bus by
Alternating current is powered through Switching Power Supply conversion.DC bus is powered in the presence of alternating current for load of base station, and for lead-acid battery and
Lithium battery power supply unit charging.Lead-acid battery because itself can be with one directly on DC bus with the characteristic of floating charge, and lithium
Battery power supply unit is after detecting that internal lithium battery group fills with electricity, and BMS will automatically control DC/DC converter, by lithium
The charge circuit that battery power supply unit is connected with DC bus disconnects terminating charging process.
Fig. 6 is current flow diagram under alternating current power loss, lithium battery power supply, as shown, in the case where alternating current power loss,
DC bus is powered by the one of lithium battery power supply unit being connected with DC bus.DC bus is from lithium battery power supply
Unit obtains energy, and powers for load of base station, while charging for lead-acid battery.During this, lithium battery power supply unit is logical
Detection DC bus-bar voltage is crossed, be made whether electric discharge and whether stops the logic judgment of electric discharge, and realization makes direct current in electric discharge
Busbar voltage maintains the level for being slightly below lead-acid battery float charge voltage, and stops lithium battery power supply list at city power recovery
The discharge process of member.
Fig. 7 is lead-acid battery discharge curve schematic diagram, if as shown, lead-acid battery still carries out charging general fully charged afterwards
Into the floating charge stage, voltage remains float charge voltage V1, this is also the voltage level of DC bus under mains-supplied state.Floating
Two voltage values V2 and V3 are chosen between charging voltage V1 and the platform voltage V4 of lead-acid battery, make to meet quantitative relation V1 > V2 > V3 >
V4, note V3 are lithium battery discharge voltage, and V2 is offset, after alternating current power loss, before lithium battery power supply unit work, lead-acid battery
The power supply of DC bus will be served as in short time, voltage value is DC bus-bar voltage, when lithium battery power supply unit is examined
It can clearly judge that current system is in alternating current power failure state when measuring DC bus-bar voltage lower than lithium battery discharge voltage V3,
Discharging compensation is carried out, and DC bus-bar voltage is made to go up to offset V2, whether lithium battery power supply unit discharges during this
Logic controlled using hysteresis method.
The lithium battery power supply unit hysteresis controls electric discharge, uses whether as shown in figure 8, lithium battery power supply unit is discharged
Logical value 1 and 0 indicate, then can be expressed as voltage from float charge voltage V1 or more than be decreased below lithium battery discharge voltage V3 when put
Electric logic is 1 from 0 jump, that is, starts to discharge；Voltage goes back up to floating charging from lower than lithium battery discharge voltage V3 in discharge process
Electric discharge logic is 0 from 1 jump when pressing V1, that is, stops electric discharge.
The competition mechanism for making lithium battery power supply unit be followed successively by load of base station and lead-acid battery group power supply, passes through lithium electricity
The delay setting of pond power supply unit is achieved.In the BMS of each lithium battery power supply unit each other for the setting for the gear that is delayed
Independent, specific delay setting is divided into T1 to T10 from low to high and amounts to 10 gears, and wherein T1 indicates delay 1 second, and T2 indicates delay
2 seconds, T10 indicated delay 10 seconds, and so on.In use, since the gap of different lithium battery power supply units is necessarily deposited
, though each lithium battery power supply unit delay gear it is identical, delay the end time also can be variant, handle faster lithium battery
Power supply unit can make discharge operation earlier, so that DC bus-bar voltage has been after the delay of other lithium battery power supply units
Most fast lithium battery power supply unit compensation is processed to lithium battery discharge voltage V3 is higher than, other lithium battery power supply units are therefore
It cannot discharge, to realize the competition mechanism on discharging compensation between lithium battery power supply unit, and avoid communication bus and exist
Use in system simplifies installation steps so that all lithium battery power supply units individually need only carry out wiring with DC bus
Reduce wiring quantity simultaneously.
Further, competition mechanism is set by delay independent in each lithium battery power supply unit, makes the lithium first to discharge
Battery power supply unit competitiveness with very little during power loss next time, lithium battery power supply unit competition electric discharge, avoids
The same lithium battery power supply unit frequently discharges and has the utilization rate more much higher than other lithium battery power supply units.
Further, competition mechanism avoids the retired dynamic lithium battery performance in single lithium battery power supply unit and declines rapidly
Subtract, reached the balance to lithium battery power supply unit utilization rates all on DC bus, realizes with a batch access DC bus
The approximate service life having the same of retired dynamic lithium battery group in lithium battery power supply unit, uniformly can be replaced and be safeguarded
The operation expense of communication base station power supply system is saved in work.
The competition mechanism for making lithium battery power supply unit be followed successively by load of base station and lead-acid battery group power supply, in direct current mother
Control strategy in the case that the delay setting of all lithium battery power supply units is not completely in highest gear T10 on line, such as
Shown in Fig. 9, specifically includes the following steps:
When A-1:BMS detects that DC bus-bar voltage is less than or equal to lithium battery discharge voltage V3, each lithium battery power supply list
Member carries out delay operation according to the delay gear of therein delay setting；
A-2: after delay, if lithium battery power supply unit remains to detect that DC bus-bar voltage is less than or equal to lithium battery
Discharge voltage V3 then carries out electric discharge and the delay of itself setting is increased by 1 (i.e. the time of delay next time increases by 1 second), otherwise
Continue to test DC bus-bar voltage；The lithium battery power supply unit of end first delay competes the task to discharging compensation DC bus,
Examine other lithium battery power supply units after delay DC Bus voltage compensatory to offset V2 rapidly after discharging compensation
DC bus-bar voltage is not detected less than or equal to V3, to realize that single lithium battery power supply unit is discharged；Delay is arranged
Different lithium battery power supply units, delay gear is higher, and competitiveness is lower；
When A-3:BMS detects that DC bus-bar voltage is more than or equal to V1, it can be determined that alternating current is recovered out, if currently
Lithium battery power supply unit is also in discharging compensation state and then stops discharging；The retired power lithium battery that BMS is managed further according to itself
Pond group state controls DC/DC converter if electricity is discontented, is the charging of retired dynamic lithium battery group by DC bus.
The competition mechanism for making lithium battery power supply unit be followed successively by load of base station and lead-acid battery group power supply, in direct current mother
The demonstrate set of all lithium battery power supply units is completely in the control strategy in the case where highest gear T10, such as Figure 10 on line
It is shown, specifically includes the following steps:
When B-1:BMS detects that DC bus-bar voltage is less than or equal to lithium battery discharge voltage V3, each lithium battery power supply list
Member carries out delay operation according to the delay gear of therein delay setting；
B-2: since the delay setting of all lithium battery power supply units is highest gear T10, after delay, lithium battery
Power supply unit detects that DC bus-bar voltage is less than or equal to lithium battery discharge voltage V3, then itself delay setting is reset to T1,
And restart to be delayed according to modified delay setting；This process due to T1 delay, even if each lithium battery power supply list
The reaction speed of member has differences, and the delay setting resetting of all lithium battery power supply units can be also completed in 1 second time；
B-3: after delay, if lithium battery power supply unit remains to detect that DC bus-bar voltage is less than or equal to lithium battery
Discharge voltage V3 then carries out electric discharge and the delay of itself is arranged to increase by 1 (being changed to T2), otherwise continues to test direct current mother
Line voltage；The lithium battery power supply unit competition of end first delay to discharging compensation DC bus task, after discharging compensation rapidly
By DC Bus voltage compensatory to offset V2, other lithium battery power supply units is made to can't detect DC bus after delay
Voltage is less than or equal to V3, to realize that single lithium battery power supply unit is discharged；It is all heavy by the delay setting in B-2
It sets, guarantees that delay time will not extend without limitation in this step, also ensure that all lithium battery power supply units still and can be carried out and is competing
It strives, competition mechanism is saved；
When B-4:BMS detects that DC bus-bar voltage is more than or equal to V1, it can be determined that alternating current is recovered out, if currently
Lithium battery power supply unit is also in discharging compensation state and then stops discharging；The retired power lithium battery that BMS is managed further according to itself
Pond group state controls DC/DC converter if electricity is discontented, is the charging of retired dynamic lithium battery group by DC bus.
The competition mechanism for making lithium battery power supply unit be followed successively by load of base station and lead-acid battery group power supply, realizes competition
The lithium battery power supply unit control program of mechanism is not by lithium battery power supply lists other in addition to the lithium battery power supply unit where itself
The influence of member, therefore the control program for further realizing all lithium battery power supply units can work independently.
Further, independence of the lithium battery power supply unit in wiring and control program, realizes to DC bus
During being independently accessed additional lithium battery power supply unit or the existing part lithium battery power supply unit of excision, without to other
Any adjustment is made in the program of lithium battery power supply unit or wiring, to realize the lithium battery power supply unit accessed on DC bus
Number can carry out any variation according to demand.
By taking certain communication base station as an example, a specific embodiment of the invention is introduced.
The power supply system structure of the communication base station is as shown in Fig. 2, on DC bus other than load of base station and lead-acid battery
Several lithium battery power supply units are separately connected to, all T1 are arranged in the delay in each unit.Due to using not by lithium battery power supply
The competition mechanism that unit number influences, each lithium battery power supply unit is independently connected with DC bus and built-in identical control journey
Sequence, delay setting is independent of one another, does not use communication bus, and lithium battery power supply unit is in hardware connection level and program design layer
On face independently of one another, therefore a lithium battery power supply unit can be added on DC bus at any time according to demand, it can also be with
Existing lithium battery power supply unit is extractd at any time.
Based on above-mentioned analysis, the communication base station multichannel based on competition mechanism of the communication base station uses the reality of battery manager with
Existing method:
It (1) is DC bus powered, DC bus after Switching Power Supply is transformed to direct current by alternating current in the presence of alternating current
It powers for load of base station and lead-acid battery group, and the lithium battery power supply unit power supply to need to charge, lead-acid battery group charge to
Floating charge state, the retired dynamic lithium battery group inside battery management system (BMS) judgement in lithium battery power supply unit have been filled
DC/DC converter after full electricity inside automatic control unit, by the charge circuit open circuit of the lithium battery power supply unit；
(2) alternating current power loss moment, simultaneously DC bus-bar voltage decline is not detected in lithium battery power supply unit, by lead in the short time
Sour battery be it is DC bus powered, DC bus be load of base station power；
(3) alternating current power loss and be DC bus-bar voltage decline after DC bus carries out of short duration power supply by lead-acid battery, when
When DC bus-bar voltage drops to lithium battery discharge voltage V3 or following, all lithium battery power supply units connect on DC bus
It is almost detected simultaneously by this voltage decline phenomenon and triggers respective delay setting, any lithium battery power supply unit is by delay
Afterwards if still having DC bus-bar voltage not higher than lithium battery discharge voltage V3, starting electric discharge and increasing the gear of delay setting
The lithium battery power supply unit competition for adding, therefore most terminating delay fastly has been arrived for DC bus powered task and DC bus is electric
Pressure is compensated to offset V2, while will be reduced automatically from the competitiveness in competition process next time, additionally due in whole
The step for all resetting to T1 are needed when all T10 gear of lithium battery power supply unit, most short delay in entire competition process
It is T1=1 seconds, longest delay is T10+T1=10+1=11 seconds；
(4) behind city power recovery, restore to by alternating current through Switching Power Supply be it is DC bus powered, DC bus is lead-acid battery
The state of group and load of base station power supply, the detectable DC bus-bar voltage of lithium battery power supply unit gos up to float charge voltage at this time
V1, the BMS for receiving this information can automatically control DC/DC converter, and the discontented lithium battery power supply unit of electricity starts by straight
Busbar charging is flowed, thus the case where returning to (1).
The foregoing description of the disclosed embodiments, being only used for professional and technical personnel in the field can be realized or use this hair
It is bright.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present invention, therefore sheet
Invention is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and innovative point phase
Consistent widest scope.
Claims (10)
1. a kind of communication base station multichannel based on competition mechanism uses battery manager, including Switching Power Supply, load of base station, plumbic acid with
Battery pack, multiple lithium battery power supply units, DC bus, the Switching Power Supply input terminal are electrically connected with city, output end and direct current
Bus is connected, and DC bus is connected with load of base station, lead-acid battery group and multiple lithium battery power supply units, which is characterized in that every
A lithium battery power supply unit is independent lithium battery power supply unit, does not communicate to connect each other, independent detection DC bus electricity
Pressure and independent control are discharged each by DC bus；In mains-supplied by alternating current through Switching Power Supply be load of base station supply
Electricity simultaneously charges for lead-acid battery group and lithium battery power supply unit, makes multiple lithium battery power supplies by competition mechanism in alternating current power loss
Unit is followed successively by load of base station and lead-acid battery group power supply.
2. the communication base station multichannel based on competition mechanism uses battery manager with as described in claim 1, which is characterized in that every
A lithium battery power supply unit sets respective discharge lag and parameter is arranged, and the discharge lag setting parameter is that each lithium battery supplies
Electric unit from detect DC bus-bar voltage meet condition to control electric discharge delay duration；The multiple lithium battery power supply
The competition mechanism of unit is arranged parameter by setting discharge lag and realizes.
3. the communication base station multichannel based on competition mechanism uses battery manager with as described in claim 1, which is characterized in that every
A lithium battery power supply unit is using hysteresis control electric discharge；Two are set between the float charge voltage and platform voltage of lead-acid battery group
Voltage value, smaller value are lithium battery discharge voltage, and the larger value is offset, the lithium electricity when DC bus-bar voltage is lower than discharge voltage
Power supply unit access DC bus in pond simultaneously starts to discharge, by DC Bus voltage compensatory to offset, when DC bus-bar voltage returns
Lead-acid battery group float charge voltage is risen to, then lithium battery power supply unit stops electric discharge.
4. the communication base station multichannel based on competition mechanism uses battery manager with as described in claim 1, which is characterized in that institute
Stating Switching Power Supply includes direct current bus voltage detecting circuit, AC/DC converter and its control circuit, is examined by DC bus-bar voltage
It surveys and AC/DC converter is controlled as a result, adjusting control circuit output, obtain standard compliant DC bus from commercial power rectification
Voltage.
5. the communication base station multichannel based on competition mechanism uses battery manager with as described in claim 1, which is characterized in that institute
Stating lithium battery power supply unit includes DC/DC converter, retired dynamic lithium battery group, battery management system (BMS), DC bus electricity
Detection circuit is pressed, wherein DC/DC converter two sides are connected with DC bus and retired dynamic lithium battery group respectively, DC bus electricity
Detection circuit is pressed to detect DC bus-bar voltage, DC bus-bar voltage signal inputs to battery management system, and battery management system is defeated
Control signal gives DC/DC converter out.
6. the communication base station multichannel based on competition mechanism uses battery manager with as claimed in claim 5, which is characterized in that institute
Stating lithium battery power supply unit further comprises, battery voltage detection circuit, current detection circuit, battery voltage detection electricity
Road, current detection circuit are connected to battery management system；Current detection circuit detects the electric current for flowing in or out lithium battery group, electricity
Pond group voltage detecting circuit detects the voltage value of retired dynamic lithium battery group entirety.
7. the communication base station multichannel based on competition mechanism uses battery manager with as described in claim 1, which is characterized in that every
A lithium battery power supply unit is being then to increase discharge lag setting parameter after DC bus is powered by competition mechanism；
When all lithium battery power supply unit discharge lags setting parameter is maximum delay duration, when being re-set as minimum delay
It is long.
8. a kind of control method based on claim 1 battery manager, which is characterized in that
It is that all lithium battery power supply units charge by DC bus, current lithium battery power supply unit is filled in the presence of alternating current
The loop open circuit that lithium battery power supply unit charges from DC bus after full；
In alternating current power loss, lithium battery power supply unit by competition mechanism is sequentially ingressed into DC bus and to be DC bus powered,
The same time has and only one lithium battery power supply unit is powered；
All lithium battery power supply units be not able to satisfy DC bus need load of base station power demands, at this time again by plumbic acid
Battery pack is powered for load of base station.
9. control method as claimed in claim 8, which is characterized in that
In alternating current power loss, lithium battery power supply unit is sequentially ingressed into DC bus by competition mechanism and is DC bus powered tool
Body the following steps are included:
A-1: when each lithium battery power supply unit detects that DC bus-bar voltage is less than or equal to lithium battery discharge voltage V3, each lithium electricity
Pond power supply unit carries out delay operation according to the delay parameter that therein is arranged；
A-2: after delay, if lithium battery power supply unit remains to detect that DC bus-bar voltage discharges less than or equal to lithium battery
Voltage, then control carries out electric discharge and increases the delay parameter of itself, otherwise continues to test DC bus-bar voltage；Terminate to prolong at first
When lithium battery power supply unit by discharging after tournament selection, other lithium battery power supply units are caused after its discharging compensation
DC bus-bar voltage be can't detect after delay less than or equal to discharge voltage, realize that unique lithium battery power supply unit is put
Electricity；
A-3:, can when each lithium battery power supply unit detects that DC bus-bar voltage is more than or equal to the float charge voltage of lead-acid battery group
To judge that alternating current is recovered, stop discharging if current lithium battery power supply unit is also in discharging compensation state；And
DC/DC converter can be controlled if electricity is discontented, is to move back by DC bus according to respective retired dynamic lithium battery group state
Use as a servant the charging of dynamic lithium battery group.
10. control method as claimed in claim 9, which is characterized in that
In step A-2: when the delay parameter of lithium battery power supply unit is maximum value, after delay, lithium battery power supply unit
It detects that DC bus-bar voltage is less than or equal to lithium battery discharge voltage V3, then itself delay parameter is reset into minimum value, laid equal stress on
New trigger operation.
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| CN109245214B (en) | 2023-08-29 |
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