CN105514512A - Energy saving method for communication base station - Google Patents
Energy saving method for communication base station Download PDFInfo
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- CN105514512A CN105514512A CN201511033373.XA CN201511033373A CN105514512A CN 105514512 A CN105514512 A CN 105514512A CN 201511033373 A CN201511033373 A CN 201511033373A CN 105514512 A CN105514512 A CN 105514512A
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- discharge
- battery pack
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- 238000004891 communication Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 230000005611 electricity Effects 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 7
- 238000004378 air conditioning Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 13
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000004146 energy storage Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 238000010295 mobile communication Methods 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- 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
-
- H02J2007/0067—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to the field of energy conservation of a communication base station, and discloses an energy saving method for the communication base station. The energy saving method comprises the following specific steps that: a controller controls a battery or a battery pack to discharge in a peak electricity period, and allows the ambient temperature of the communication base station to be increased according to the characteristic of a lead acid storage battery which absorbs heat during low-current discharging; the indoor temperature of the communication base station is kept within a certain selected temperature range via the adjustment of the controller; the controller controls an indoor temperature adjustment device of the communication base station to increase the constant temperature while controlling the battery or the battery pack to discharge; the controller controls the indoor temperature adjustment device to recover the general setting of the constant temperature while controlling the battery or the battery pack to charge. The energy saving method has the advantages that due to the characteristic that the lead acid storage battery absorbs heat during low-current discharging, when the power supply requirement of the base station is met, an equal temperature control mechanism is provided; meanwhile, the problem of energy consumption of the base station is better solved by adjusting the charging and discharging time and the steps of the battery; the economical benefit is outstanding, and a higher application value is achieved.
Description
Technical field
The present invention relates to communication base station energy-conserving field, particularly a kind of communication base station power-economizing method, can effectively realize energy-conservation object.
Background technology
Valve controlled sealed accumulator is very responsive to temperature, and temperature raises, and all chemical reaction velocities all will exponentially rise, and the nominal serviceability temperature of storage battery is 25 DEG C, and long-time running temperature often raises 10 DEG C, and useful life about reduces half.In order to ensure the normal work of storage battery, having in machine room, be equipped with Special industrial air-conditioning, and operation of air conditioner temperature is set to 25 DEG C all the year round, thus creating a large amount of energy consumptions.
According to statistics, mobile communications industry has 73% energy consumption to be base station side, and is mainly air-conditioning and base station equipment in energy consumption of base station, and both almost respectively accounts for half.
It is the fundamental state policy of China that national energy-saving reduces discharging, the scheme of energy-saving and emission-reduction basic in Communication in China base station at present, mainly reduces air conditioning energy consumption, sets up new forms of energy base station and utilizes the energy storage technology of avoiding the peak hour of time-of-use tariffs difference.
In reduction air conditioning energy consumption, existing many precedents.Comprise a kind of mobile communication base station energy saving heat radiation cabinet, the method for the directed heat extraction cooling device of a kind of communication base station and a kind of communication base station energy-conserving system and control method.The air-conditioning in base station can be made to be in interval work state.
In the utilization of avoiding the peak hour energy storage technology, comprise a kind of communication power supply and to avoid the peak hour energy-storage system.Monitoring unit is utilized to carry out automatic control and management to the charge and discharge process of batteries, batteries peak period is release initiatively, insufficient section is again by the rectifier supply of DC power-supply system, and the valley period charges, thus realizes electrical network and use electricity in off-peak hours and optimize allocation of resources.Another part of utility model patent then discloses a kind of multifunction energy storage equipment, and a kind of modularity Mobile energy storage equipment, consist predominantly of the potential device, convertor assembly, energy storage device, Blast Furnace Top Gas Recovery Turbine Unit (TRT), inverter and the supervising device that electrically connect, form modularization, moveable energy storage device.Adopt the energy storage mechanism of energy storage of avoiding the peak hour, paddy electricity period or visual climate condition generate electricity by Blast Furnace Top Gas Recovery Turbine Unit (TRT), to store cheap electric energy, and provide electric power in the peak period of electricity consumption.
In new forms of energy base station construction, a kind of communication base station energy-conserving system, includes solar cell, Switching Power Supply, micro-control unit MCU.Realize energy-conservation by the work of regulation and control ventilating system and air-conditioning system, and power to ventilating system with solar electric power supply system.A kind of energy saving technology of mobile communication base station, make that machine room is unsettled to be built on launching tower pedestal, frame structure, body of wall is hollow insulation interlayer, and utilize solar energy as the energy of blower fan, illumination, cooling liquid circulating pump and non-communicating electricity consumption thereof, communication emitting equipment installs heat radiating device special, if storage cooling liquid device, utilize day and night temperature pump to circulate and air cooling cooling liquid, mobile communication base station construction can be widely used in, Economization on land.
In addition another invention then discloses a kind of for communication base station energy-conserving metering method, mainly based on the Calculation Method of Energy Consumption of energy consumption metering system part of data acquisition.Important evidence is provided for selecting energy-saving equipment, formulating energy-saving scheme and calculating energy-saving benefit.
These devices and scheme are that communication base station provides feasible energy-saving method, greatly reduce operating cost.But mostly need newly-built base station, configure new equipment, or the high temperature resistant technology battery of buying high cost, prepare process difficult, the investment payback time, (ROI) was relatively long, and economic benefit weakens relatively.
The problem of above-mentioned prior art is, needs to use extra temperature control equipment to regulate the temperature in communication base station, and recondition expense is high, and difficulty is large, and ordinary energy consumption is large.Or effectively do not utilize existing low power temperature control equipment in communication base station, cause overlapping investment and waste.
The present invention introduces a kind of new direction of communication base station energy-conserving--the solution of temperature adjustment pattern, lead acid accumulator low discharging current is utilized to inhale thermal property, base-station environment temperature is allowed to heighten, be further advanced by controller to match with air-conditioning equipment existing in communication base station, reduce the energy consumption of constant temperature further.
Summary of the invention
The present invention is directed in prior art and need extra large-scale temperature control equipment to be installed to regulate the shortcoming of the indoor temperature of communication base station, provide a kind of communication base station power-economizing method, utilize lead acid accumulator low discharging current to inhale thermal property, reach the object reducing energy consumption.
For achieving the above object, the present invention can take following technical proposals:
A kind of communication base station power-economizing method, is characterized in that, comprise following concrete steps:
Discharge and recharge temperature adjustment step: controller controls battery or battery power discharge in the peak electricity period, utilizes lead acid accumulator low discharging current to inhale thermal property, allows base-station environment temperature to heighten.; Described battery or battery pack make the indoor temperature of described communication base station remain in a temperature range selected when powering to communication equipment by the adjustment of described controller.
Further, as the optional scheme of one, in the embodiment of the application, also following concrete steps are comprised:
Step worked in coordination with by air-conditioning: while controller controls described battery or battery power discharge, controls to heighten at its thermostat temperature of indoor temperature regulating device of described communication base station.; While controller controls described battery or batteries charging, control its thermostat temperature of indoor temperature regulating device and recover usually to arrange.
Further, as the optional scheme of one, in the embodiment of the application, described controller, in the process controlling described battery or battery power discharge, limits the strength of discharge of described battery or battery pack; .
Further; as the optional scheme of one; in the embodiment of the application, described discharge and recharge temperature adjustment step also comprises: when described battery or battery power discharge, controls protection voltage when discharge time of described battery or battery pack and battery or battery power discharge simultaneously.
Further, as the optional scheme of one, in the embodiment of the application, the depth of discharge that described controller controls battery or battery pack controls the 5%-60% of the total capacity in described battery or battery pack.
The present invention has following remarkable technique effect:
The thermal effect of battery or the low discharging current of battery pack own can being made full use of, when discharging by controller, reaching the object reducing communication base station constant temperature energy consumption.
Accompanying drawing explanation
Fig. 1 is the controller syndeton schematic diagram in the communication base station of communication base station power-economizing method use.
Fig. 2 is the step annexation figure of communication base station power-economizing method.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, 2, a kind of communication base station power-economizing method, for utilizing battery or battery pack in the process of self discharge and recharge, low discharging current heat absorption characteristic, the electric discharge that small area analysis carries out when referring to and the discharging current of battery is limited to the less discharging current of relatively general nominal discharge current, those skilled in the art can arrange actual size of current under the discharging current limited, and arrange according to the actual effect of discharge magnitude, carry out indoor temperature and regulate.For this reason, need in communication base station, arrange the controller 101 that can control the discharge and recharge of described battery or battery pack 102 extraly, reach reduction energy consumption, save the object of the energy.The structure of described controller 101 can adopt any existing control device, and those skilled in the art can obtain the structure being applicable to the controller 101 that the present embodiment uses on the basis of state of the art.The connected mode of described controller as shown in Figure 1, controller 101 is connected with the indoor temperature regulating device 103 of a high frequency switch power 104 and communication base station, described high frequency switch power 104 is undertaken getting a little by electrical network, the charge and discharge process of described battery or battery pack 102 is controlled further under the control of described controller 101, further, controller 101 can also control described indoor temperature regulating device 103, regulates to improve indoor temperature further and saves the energy.
Described communication base station power-economizing method comprises following concrete steps:
As shown in Figure 2, discharge and recharge temperature adjustment step 201:
Controller 101 discharges at peak electricity period control battery or battery pack 102, utilizes lead acid accumulator low discharging current to inhale thermal property, allows base-station environment temperature to heighten.Described battery or battery pack 102 make the indoor temperature of described communication base station remain in a temperature range selected when powering to communication equipment by the adjustment of described controller 101.
Optimum working temperature due to battery itself is 20-25 DEG C, and therefore described controller 101 is when carrying out temperature adjustment to the indoor of communication base station, also must consider the working temperature of battery itself.In addition, the equipment of communication base station is placed in one and comparatively closes and heat insulation indoor, and its heat-proof quality is better usually, and the interior space is comparatively narrow, and therefore the suction heat release of battery or battery pack 102 can cause larger impact to the temperature of communication base station.In the embodiment of the application, generally the indoor temperature change generated in case caused due to heat-proof quality of communication base station is ignored, as the optional scheme of one, when the heat-proof quality of communication base station is not good, the optimum working temperature of described battery suitably can be regulated, thus the technical scheme that the embodiment of the application can be made to record is applied to situation more widely.
Further, for needing the indoor temperature regulating device 103 of use electric energy, controller 101 can also utilize time-of-use tariffs difference, reaches the saving energy further, reduces the object of electric energy spending.Usually the economize on electricity step thought is, is included in the electric discharge period in the peak electricity stage, is arranged in by charge period in the paddy electricity period, utilizes the difference of time-of-use tariffs, thus reach the object of saving electric energy spending.Further power-saving measures can also comprise, between peak-trough electricity, stabilize charge and discharge process as much as possible, restriction strength of discharge, within the whole peak electricity time period, extend discharge time, reduce battery discharge degree of depth during electric discharge, it is good that depth of discharge controls at 5%-60%.Be full of battery as quickly as possible when paddy electricity, as far as possible battery or battery pack 102 be full of at the end of paddy electricity.
Further, described communication base station power-economizing method also comprises following concrete steps:
Step 202 worked in coordination with by air-conditioning: controller 101 controls to heighten at its thermostat temperature of indoor temperature regulating device 103 of described communication base station while controlling described battery or battery pack 102 electric discharge.While controller 101 controls described battery or battery pack 102 charging, control its thermostat temperature of indoor temperature regulating device 103 and recover usually to arrange.
Further, described controller 101, in the process controlling described battery or battery pack 102 electric discharge, limits the strength of discharge of described battery or battery pack 102; Described controller 101, in the process controlling described battery or battery pack 102 charging, limits the charge strength of described battery or battery pack 102.
Further, described discharge and recharge temperature adjustment step 201 also comprises: when described battery or battery pack 102 discharge, and controls protection voltage when discharging discharge time of described battery or battery pack 102 and battery or battery pack 102 simultaneously.
When system meets with power failure; then start backup mode control strategy; meet with power failure when charging; then switch to electric discharge at once; and keep current protection voltage until the discharge voltage of battery or battery pack 102 is down to the voltage of regular picture; now close voltage protection, calculate the socking out time of battery according to the residual capacity of battery after peak electricity stage discharge, battery at least can also be supported the electric discharge of 8h or have a power failure to terminate.Have a power failure when meeting with when discharging; then controller 101 controls described battery or battery pack 102 and continues electric discharge until the discharge voltage of battery or battery pack 102 is down to normal discharge voltage; close voltage protection; and terminate once have a power failure, charge to battery or battery pack 102 immediately, be full of rear beginning above-mentioned discharge and recharge temperature adjustment step 201.
Further, the depth of discharge that described controller 101 controls battery or battery pack 102 controls the 5%-60% of the total capacity in described battery or battery pack 102, and charges immediately after the depth of discharge of described battery or battery pack 102 reaches the full quota.As the optional scheme of one, depth of discharge can adjust in above-mentioned limits.
Also further comprise an example specifically in the present embodiment, use a base station as shown in Figure 1, the system of base station comprises electrical network, high frequency switch power, battery pack 102, controller 101, air-conditioning, BTS DC load apparatus.First open discharge and recharge temperature adjustment step 201, and controller 101 controls battery pack 102 by the electric discharges in 8 o'clock to 24 o'clock of a day, embodiment 1 for discharging current be 0.006C
10or 3A, discharge time is 16 hours, and the battery power discharge degree of depth is 9.6%.Charged 8 hours by 0 o'clock to 8 o'clock battery, charging modes is modified constant-voltage charge, and charging voltage is 2.27V/ battery, and cut-off current is 0.15C
10or 75A; Embodiment 2 is discharging current 0.0375C10 or 18.75A, discharge time is 16 hours, and the battery power discharge degree of depth is 60%, and charge 8 hours, charging modes is modified constant-voltage charge, and charging voltage is 2.35V/ battery, and cut-off current is 0.15C
10or 75A, this charge and discharge system is higher to battery performance requirements, is more suitable for using peak load shifting energy storage technology.Secondly the corresponding unlatching of step worked in coordination with by air-conditioning, at 8 o'clock to 24 o'clock, controller controls base station air conditioner simultaneously and reaches 35 DEG C of unlatchings in ambient temperature, and to arrange thermostat temperature be 35 DEG C, then opened after ambient temperature reaches 25 DEG C at 0 o'clock to 8 o'clock, and the thermostat temperature of base station air conditioner is set to 25 DEG C, the thermostat temperature of above-mentioned air-conditioning is an optional instantiation in the scope that the claim of the application limits, other thermostat temperature is also optional, further, after controller 101 detects that ambient temperature reaches thermostat temperature, just open air-conditioning, and indoor temperature promotes or is reduced to thermostat temperature by non-used air-conditioning equipment, the suction exothermic character making full use of battery reaches the object of node.Through calculating, after with the addition of a controller, make full use of temperature adjustment, embodiment 1 power saving rate can reach 15.32%, is the cost dropped at the recoverable initial stage in 0.20 afterwards; Embodiment 2 power saving rate can reach 22.11%, the cost of recoverable initial stage input after 0.41.Controller 101 controls battery pack 102 and carries out small area analysis constant-current discharge, and the depth of discharge of battery is 5%-60%, and the discharge cycles quantity of battery greatly increases.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (5)
1. a communication base station power-economizing method, is characterized in that, comprises following concrete steps:
Discharge and recharge temperature adjustment step (201): controller (101) controls battery or battery pack (102) electric discharge in the peak electricity period, utilizes lead acid accumulator low discharging current to inhale thermal property, allows base-station environment temperature to heighten; Described battery or battery pack (102) make the indoor temperature of described communication base station remain in a temperature range selected when powering to communication equipment by the adjustment of described controller (101).
2. communication base station power-economizing method according to claim 1, is characterized in that, also comprises following concrete steps:
Step (202) worked in coordination with by air-conditioning: controller (101) controls while described battery or battery pack (102) discharge, to control to heighten at indoor temperature regulating device (103) its thermostat temperature of described communication base station; Controller (101) controls while described battery or battery pack (102) charge, to control indoor temperature regulating device (103) its thermostat temperature and recover usually to arrange.
3. the communication base station power-economizing method according to claims 1 or 2, it is characterized in that, described controller (101) is controlling, in the process that described battery or battery pack (102) discharge, to limit the strength of discharge of described battery or battery pack (102).
4. communication base station power-economizing method according to claim 1; it is characterized in that; described discharge and recharge temperature adjustment step (201) also comprises: when described battery or battery pack (102) electric discharge, controls protection voltage when discharge time of described battery or battery pack (102) and battery or battery pack (102) electric discharge simultaneously.
5. communication base station power-economizing method according to claim 1, it is characterized in that, the depth of discharge that described controller (101) controls battery or battery pack (102) controls the 5%-60% of the total capacity in described battery or battery pack (102).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511033373.XA CN105514512B (en) | 2015-12-31 | 2015-12-31 | Communication base station power-economizing method |
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| CN201511033373.XA CN105514512B (en) | 2015-12-31 | 2015-12-31 | Communication base station power-economizing method |
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| CN105514512A true CN105514512A (en) | 2016-04-20 |
| CN105514512B CN105514512B (en) | 2018-06-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684481A (en) * | 2016-12-13 | 2017-05-17 | 芜湖市吉安汽车电子销售有限公司 | Method for optimizing service life of power battery of new energy automobile |
| CN107732332A (en) * | 2017-09-12 | 2018-02-23 | 深圳市佰特瑞储能***有限公司 | A kind of telecomm base station battery dormancy and air-conditioning association's control method and system |
| CN111917122A (en) * | 2020-06-30 | 2020-11-10 | 嘉善数能技术有限公司 | Peak clipping and valley filling power supply control method for communication base station |
| CN112803400A (en) * | 2021-01-29 | 2021-05-14 | 国网浙江义乌市供电有限公司 | Energy consumption regulation and control method for 5G base station |
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| US20030071523A1 (en) * | 2001-10-11 | 2003-04-17 | Silverman Martin S. | Digital battery |
| CN102635919A (en) * | 2011-11-17 | 2012-08-15 | 深圳市艾苏威尔科技发展有限公司 | Energy-saving method for controlling communication base station, background server and communication base station air conditioner |
| CN102709611A (en) * | 2012-04-25 | 2012-10-03 | 北京宝盒精英科技有限公司 | Back-up power supply of accumulator batteries for communication base station and fine maintenance method of back-up power supply |
| CN103606944A (en) * | 2013-12-04 | 2014-02-26 | 北京时空科技有限公司 | Intelligent power supply system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030071523A1 (en) * | 2001-10-11 | 2003-04-17 | Silverman Martin S. | Digital battery |
| CN102635919A (en) * | 2011-11-17 | 2012-08-15 | 深圳市艾苏威尔科技发展有限公司 | Energy-saving method for controlling communication base station, background server and communication base station air conditioner |
| CN102709611A (en) * | 2012-04-25 | 2012-10-03 | 北京宝盒精英科技有限公司 | Back-up power supply of accumulator batteries for communication base station and fine maintenance method of back-up power supply |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684481A (en) * | 2016-12-13 | 2017-05-17 | 芜湖市吉安汽车电子销售有限公司 | Method for optimizing service life of power battery of new energy automobile |
| CN107732332A (en) * | 2017-09-12 | 2018-02-23 | 深圳市佰特瑞储能***有限公司 | A kind of telecomm base station battery dormancy and air-conditioning association's control method and system |
| CN107732332B (en) * | 2017-09-12 | 2019-12-10 | 深圳市佰特瑞储能***有限公司 | Telecommunication base station battery dormancy and air conditioner cooperative control method and system |
| CN111917122A (en) * | 2020-06-30 | 2020-11-10 | 嘉善数能技术有限公司 | Peak clipping and valley filling power supply control method for communication base station |
| CN112803400A (en) * | 2021-01-29 | 2021-05-14 | 国网浙江义乌市供电有限公司 | Energy consumption regulation and control method for 5G base station |
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| CN105514512B (en) | 2018-06-08 |
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Effective date of registration: 20220303 Address after: No.72, landscape Avenue, Qingshanhu street, Lin'an City, Hangzhou City, Zhejiang Province Patentee after: ZHEJIANG NARADA POWER SOURCE Co.,Ltd. Patentee after: Wuhan Nandu New Energy Technology Co., Ltd Address before: No.72, landscape Avenue, Qingshanhu street, Lin'an City, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG NARADA POWER SOURCE Co.,Ltd. |
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