CN205960753U - Battery charge and discharge is utilized to communication base station lithium iron phosphate battery echelon - Google Patents
Battery charge and discharge is utilized to communication base station lithium iron phosphate battery echelon Download PDFInfo
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- CN205960753U CN205960753U CN201620801463.2U CN201620801463U CN205960753U CN 205960753 U CN205960753 U CN 205960753U CN 201620801463 U CN201620801463 U CN 201620801463U CN 205960753 U CN205960753 U CN 205960753U
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Abstract
The utility model provides a battery charge and discharge is utilized to communication base station lithium iron phosphate battery echelon, include: two -way energy storage converter, echelon battery system and electric automobile battery charging outfit, the interchange interface connection electric wire netting or the communication base station distribution equipment of two -way energy storage converter, ethernet interface connection communication base station switch, the CAN interface of CAN interface connection echelon battery system, the direct current interface of the two -way energy storage converter of direct current interface connection of echelon battery system, electric wire netting or communication base station distribution equipment are connected to the electric automobile battery charging outfit, pass through the CAN interface of the two -way energy storage converter of CAN interface connection simultaneously. The utility model discloses have multiple energy flow to to can be used for electric automobile to charge, utilize the technique through the battery echelon, can effectively avoid the short slab of lead -acid batteries in the aspect of life, energy density etc. Can also reduce lithium iron phosphate power battery's use cost simultaneously.
Description
Technical field
This utility model is related to communication base station energy-storage battery technical field, in particular it relates to a kind of communication base station iron phosphate
Lithium battery echelon utilizes charge-discharge system.
Background technology
The energy-storage battery overwhelming majority in existing base station uses lead-acid battery, in terms of energy density, service life
All there is larger gap compared with ferric phosphate lithium cell, and application in communication base station for the brand-new ferric phosphate lithium cell because cost because
Element and large-scale promotion cannot be realized.
With the application of electric automobile in recent years, the renewal of the electric automobile power battery causing because of capacity attenuation
Amount is increasing, for the electrokinetic cell replaced, because of low cost, and high temperature performance, energy density, cycle life, height
The aspects such as charge-discharge magnification, low self-discharge rate, safety and the feature of environmental protection are with the obvious advantage compared with traditional lead acid batteries, its reutilization technology
Receive significant attention.
In the station of existing communication base station, lead-acid battery standby power system is bulky.Using lithium ion echelon battery energy storage system
System (containing two-way PCS device) replace station in original battery system, for station in 48V dc bus provide backup power supply while,
Also power supply can be provided for electric automobile battery charger after two-way PCS device inversion, realize under conditions of the distribution not dilatation of base station
There is provided quick charge service for electric automobile, while expanding the communication base station scope of business, can achieve the mesh of electricity profit of reselling
's.
Though currently having application in communication base station for the ferric phosphate lithium cell, its major part is all using brand-new iron phosphate
Lithium battery, and the application aspect in battery energy storage, the equipment being mainly embodied as in communication base station provides emergency power supply.
Through retrieval,《Ferric phosphate lithium cell is in the Application research of the communications industry》(Yan Desheng, communication power supply technology, 2014
The 6th phase of volume 31 November 25) in ferric phosphate lithium cell, the application in the communications industry is inquired into, to LiFePO4 electricity
The performance of pond and lead-acid battery has carried out contrast it is indicated that the application direction in the communications industry for the ferric phosphate lithium cell, but is not directed to
The echelon of ferric phosphate lithium cell is using the charge and discharge control strategy of, electric business development of reselling, battery；
《Ferric phosphate lithium cell is in the application of the power supply system for communications》(Bearss Zhenhua, communication power supply technology, on November 25th, 2014
The 6th phase of volume 31) basic structure of the power supply system for communications is described, but system belongs to one-way system (i.e. energy flow direction
Can only be from electrical network to load-side), it is not directed in battery energy storage and in terms of being applied to charging electric vehicle.
Utility model content
For defect of the prior art, the purpose of this utility model is to provide a kind of communication base station ferric phosphate lithium cell ladder
Secondary utilization charge-discharge system, has multiple kinds of energy flow direction it is possible to be used for charging electric vehicle.
For realizing object above, this utility model provides a kind of communication base station ferric phosphate lithium cell echelon to utilize discharge and recharge system
System, including：Bidirectional energy-storage current transformer (PCS), echelon battery system and charging equipment of electric automobile, described bidirectional energy-storage unsteady flow
Device is provided with exchange interface, DC interface, Ethernet interface and CAN interface, described echelon battery system be provided with DC interface and
CAN interface, wherein：The exchange interface of described bidirectional energy-storage current transformer connects electrical network or communication base station controller switching equipment, described two-way
Switch in the Ethernet interface connection communication base station of energy accumulation current converter, the CAN interface of described bidirectional energy-storage current transformer connects ladder
The CAN interface of primary cell system, the direct current of the DC interface described bidirectional energy-storage current transformer of connection of described echelon battery system connects
Mouthful, described charging equipment of electric automobile connects electrical network or communication base station controller switching equipment, is connected described two-way by CAN interface simultaneously
The CAN interface of energy accumulation current converter.
More preferably, described bidirectional energy-storage current transformer is provided with for energy flow control, peak interval of time setting, management of charging and discharging
Controller, carries out information exchange, described controller by CAN communication between described controller and described charging equipment of electric automobile
Carry out information exchange with described echelon battery system also by CAN communication.
More preferably, described bidirectional energy-storage current transformer also includes：Charger information gathering part, battery information acquisition component,
Input and output logic control unit, clock unit, charger information gathering part, battery information acquisition component outfan connect control
Device input processed, controller connects input and output logic control unit, and clock unit is connected with controller.
More preferably, described echelon battery system comprises multiple LiFePO4 echelon set of cells, the plurality of LiFePO4 ladder
Primary cell group is placed in cabinet.
More preferably, described echelon battery system comprises battery management system, described batteries management system and described phosphoric acid
Ferrum lithium echelon set of cells connects.
More preferably, described echelon battery system is a 48V system, and its busbar voltage fluctuation scope is in 40～57V.
More preferably, described charging equipment of electric automobile is electric automobile DC charging motor and/or electric vehicle alternating-current charging
Stake, described electric automobile DC charging motor and/or electric vehicle alternating-current charging pile are provided with charging inlet.
More preferably, described bidirectional energy-storage current transformer, echelon battery system and charging equipment of electric automobile are all by insulation
Cable connection is to electrical network or communication base station controller switching equipment.
In this utility model, when communication base station dead electricity, described controller controls described echelon battery system, by described ladder
Primary cell system provides 48V power supply for communication equipment in communication base station automatically；In low power consumption period, described controller control
Make described bidirectional energy-storage current transformer, be echelon battery system charging energy-storing by described bidirectional energy-storage current transformer, simultaneously for the base that communicates
Stand and 48V power supply is provided；In the peak of power consumption period, described controller controls described bidirectional energy-storage current transformer, by described bidirectional energy-storage
Current transformer discharges the energy in described echelon battery system, supports as electrical network, provides charging service for electric automobile.
Compared with prior art, this utility model has following beneficial effect：
This utility model utilizes technology by battery echelon, can effectively evade lead-acid battery and adapt in service life, environment
The short slab of the aspects such as property, energy density, safety, can also reduce the use cost of lithium iron phosphate dynamic battery simultaneously；This practicality
Lead-acid battery in base station is replaced by new use LiFePO4 echelon battery, has multiple kinds of energy flow direction it is possible to be used for electronic
Automobile charges.When base station dead electricity, echelon battery system can provide 48V power supply for communication equipment in base station automatically；With
Electric low-valley interval, two-way PCS can be echelon battery charging energy-storing, provide 48V power supply for base station simultaneously；In the peak of power consumption period,
Energy in the releasable energy-storage battery of two-way PCS, supports as electrical network, provides charging service for automobile user.
Brief description
By reading detailed description non-limiting example made with reference to the following drawings, of the present utility model other special
Levy, objects and advantages will become more apparent upon：
Fig. 1 is the circuit system schematic diagram of this utility model one embodiment；
Fig. 2 is the system wiring schematic diagram of this utility model one embodiment；
Fig. 3 is the schematic diagram of the first mode of operation of this utility model one Application Example；
Fig. 4 is the schematic diagram of the second mode of operation of this utility model one Application Example；
Fig. 5 is the schematic diagram of the third mode of operation of this utility model one Application Example；
Fig. 6 is the system control process figure of this utility model one Application Example；
In figure：Bidirectional energy-storage current transformer 100, echelon battery system 200, charging equipment of electric automobile 300, electrical network or communication
Base station controller switching equipment 400, insulated cable 500, electric automobile 600, AC/DC module 700, DC/DC module 800；
Bidirectional energy-storage current transformer exchange interface 101, DC interface 102, Ethernet interface 103, CAN interface 104, controller
105th, controller 105, charger information gathering part 106, battery information acquisition component 107, input and output logic control unit
108th, clock unit 109；
Echelon battery system DC interface 201, CAN interface 202, battery panel cabinet 203；
Charging equipment of electric automobile CAN interface 301, electric automobile DC charging motor 302, electric vehicle alternating-current charging pile
303rd, charging inlet 304, Ethernet interface 305, exchange interface 306.
Specific embodiment
With reference to specific embodiment, this utility model is described in detail.Following examples will be helpful to this area
Technical staff further understands this utility model, but does not limit this utility model in any form.It should be pointed out that to ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, some deformation can also be made and improve.
These broadly fall into protection domain of the present utility model.
As shown in figure 1, a kind of communication base station ferric phosphate lithium cell echelon utilizes the preferred embodiment of charge-discharge system to illustrate
Figure, including：Bidirectional energy-storage current transformer 100, echelon battery system 200 and charging equipment of electric automobile 300, described bidirectional energy-storage
Current transformer is provided with exchange interface 101, DC interface 102, Ethernet interface 103 and CAN interface 104, described echelon battery system
System is provided with DC interface 201 and CAN interface 202, wherein：The exchange interface 101 of described bidirectional energy-storage current transformer connect electrical network or
Communication base station controller switching equipment 400, switch in the Ethernet interface 103 connection communication base station of described bidirectional energy-storage current transformer, institute
State bidirectional energy-storage current transformer CAN interface 104 connect echelon battery system CAN interface 202, described echelon battery system straight
Stream interface 102 connects the DC interface 201 of described bidirectional energy-storage current transformer, and described charging equipment of electric automobile 300 connects electrical network
Or communication base station controller switching equipment 400, connect the CAN interface 104 of described bidirectional energy-storage current transformer by CAN interface 301 simultaneously.
Described bidirectional energy-storage current transformer 100 be provided with for energy hole stream, peak interval of time setting, management of charging and discharging control
Device 105, carries out information exchange by CAN communication between described controller 105 and described charging equipment of electric automobile 300, described
Controller 105 and described echelon battery system 200 carry out information exchange also by CAN communication.
When communication base station dead electricity, described controller 105 controls described echelon battery system 200, by described echelon battery
System 200 provides 48V power supply for communication equipment in communication base station automatically；In the low power consumption period, described controller 105 is controlled
Make described bidirectional energy-storage current transformer 100, be echelon battery system 200 charging energy-storing by described bidirectional energy-storage current transformer 100, simultaneously
There is provided 48V power supply for communication base station；In the peak of power consumption period, described controller 105 controls described bidirectional energy-storage current transformer 100,
Energy in described echelon battery system 200 is discharged by described bidirectional energy-storage current transformer 100, supports as electrical network, be electronic vapour
Car 600 provides charging service.
Described echelon battery system 200 comprises multiple LiFePO4 echelon set of cells, the plurality of LiFePO4 echelon electricity
Pond group is placed in battery panel cabinet 203.Described echelon battery system 200 contains battery management system (BMS), battery management simultaneously
System is connected with LiFePO4 echelon set of cells.
This utility model is for communication base station, the Acid Battery System of replaceable original base station and switch power supply equipment；
Echelon battery system is a 48V system, and busbar voltage needs to meet the fluctuation range of communication base station equipment, therefore its bus electricity
Pressure fluctuation range severely limited (40～57V), the requirement in groups of echelon battery system is 3 and 16 strings (i.e. first every 3 monomers
Cell parallel becomes a unit, then 16 unit series connection).
Described charging equipment of electric automobile is electric automobile DC charging motor 302 and/or electric vehicle alternating-current charging pile
303, described electric automobile DC charging motor and/or electric vehicle alternating-current charging pile are provided with charging inlet 304.Electric Vehicle's Alternating
Charging pile 304 is provided with Ethernet interface 305, is connected to switch in communication base station by this Ethernet interface 305.
Further, described bidirectional energy-storage current transformer 100 and charging equipment of electric automobile 300 are all by insulated cable
500 are connected to electrical network or communication base station controller switching equipment 400.More specifically, described bidirectional energy-storage current transformer 100 and electrical network or communication
It is less than 16 square millimeters of four core insulation cable connections by equivalent cross-sectional area between base station controller switching equipment 400, described electronic
It is less than 16 squares also by equivalent cross-sectional area between automobile DC charging motor 302 and electrical network or communication base station controller switching equipment 400
Four core insulation cables of millimeter, exchange interface 306 connect, described electric vehicle alternating-current charging pile 303 and electrical network or communication base station
It is less than 5 square millimeters of two core insulation cable connections by equivalent cross-sectional area between controller switching equipment 400.
As shown in Fig. 2 being the wiring schematic diagram of system described in the utility model, the controller 105 of bidirectional energy-storage current transformer
Connect AC/DC module 700, DC/DC module 800, and set with AC/DC module 700, DC/DC module 800, charging electric vehicle
Between standby 300, information exchange is carried out by CAN communication, the battery of controller 105 and echelon battery system 200 is also by CAN
Communication carries out information exchange；Two-way CAN is separate, under the factors such as controller 105 Interface limits limit, also can be all one
In bar CAN.
In a certain concrete application embodiment, line voltage is through circuit breaker Q F, fuse (in figure is not drawn into), catalyst KM
Afterwards, AC/DC module 700, DC/DC module 800 and charging equipment of electric automobile 300, wherein AC/DC module 700, DC/DC are delivered to
The ac working power supply of module 800 is taken from catalyst KM front end (near net side), and delivers to each after air switch QF1, QF2
AC/DC module 700, DC/DC module 800.Controller 105 working power taken from before catalyst KM by air switch QF3
End.
Under the control of the controller 105 of bidirectional energy-storage current transformer, described system flows to according to energy and divides, and has three kinds
Mode of operation, specially：
The first mode of operation：Electrical network charges for echelon battery system 200 through AC/DC module 700, and in communication base station
48V equipment provides power supply；Using this mode of operation, in a particular application, can be become by bidirectional energy-storage in the low power consumption period
Stream device 100 is echelon battery system 200 charging energy-storing, provides 48V power supply for communication base station simultaneously；As shown in figure 3, in figure other
Part, such as high voltage power distribution, low-voltage distribution, communication equipment, air conditioner in machine room, lightning protection earthing system, dynamic environment monitoring system, movement
Power station, standby generator sets etc., are the conventional auxiliary facility of communication base station, will not be described here；
Second mode of operation：Echelon battery system 200, after AC/DC module 700 inversion output, is electricity with electrical network jointly
Electrical automobile charger 300 provides power supply, and for charging for electric automobile 600, echelon battery system 200 is station communication simultaneously
Equipment is powered；Using this mode of operation, in a particular application, can be in the peak of power consumption period, bidirectional energy-storage current transformer 100 can be released
Put the energy in echelon battery system, support as electrical network, provide charging service for automobile user；As shown in figure 4, in figure
Other parts are the conventional auxiliary facility of communication base station, will not be described here；
The third mode of operation：Civil power dead electricity, echelon battery system 200 is that in base station, communication equipment is powered, using this work
Operation mode, in a particular application, can be in communication base station in communication base station dead electricity by echelon battery system 00 automatically
Communication equipment provides 48V power supply；As shown in figure 5, in figure other parts are the conventional auxiliary facility of communication base station, here is not
Repeat；
Described bidirectional energy-storage current transformer 100 is the core of whole system, and whole system controls by bidirectional energy-storage current transformer 100
Controller 105 realize, its topological structure logic is as shown in Figure 6.
Described bidirectional energy-storage current transformer 100 includes：Controller 105, charger information gathering part 106, battery information are adopted
Collection part 107, input and output logic control unit 108, clock unit 109, charger information gathering part 106, battery information
Acquisition component 107 outfan connects controller 105 input, and controller 105 connects input and output logic control unit 108, when
Clock part 109 is connected with controller 105.
In described bidirectional energy-storage current transformer 100：
Controller 5 is used for realizing the decision-making to whole system and instruction is issued；
Charger information gathering part 106 is used for gathering the chargers such as charger charge request information, charging real time information
Access state information, and information is defeated by controller 105；
Battery information acquisition component 107 is used for gathering the battery informations such as the real time information of echelon battery, and information is defeated by
Controller 105；
Input and output logic control unit 108 is used for the state back production such as charger access state, battery charging condition, with
And realize the control to system operating mode and battery charging and discharging；Input in input and output logic control unit 108 is shape
State back production, output is control signal；Therefore, both back production status information feedback gives control to input and output logic control unit 108
Device 105, also executes the instruction to it for the controller 105 simultaneously.
Clock unit 109 is used for providing controller 105 clock information, and controller 105 is periodically under charger, battery system
Send out pair when instruction.
Controller is according to the charger information gathering part 106 charger access state obtaining from battery information collecting unit
The clock information of information, the battery information of battery information acquisition component 107 collection and clock unit 109, the work of decision system
Operation mode, such as：Energy storage, electric discharge etc..
Further, described controller 105 controls the battery that AC/DC module is LiFePO4 echelon set of cells to be charged
(based on night charging energy-storing), when detect monomer ceiling voltage in LiFePO4 echelon set of cells reach setting numerical value when,
Then show that LiFePO4 echelon battery is filled substantially with, now stop charging.
In a particular application, stop charge condition include following any one：
(1) in LiFePO4 echelon set of cells monomer ceiling voltage reach 3.65V (this value can arrange manually or
Other numerical value)；
(2) AC/DC module output bus total voltage reaches 57V (this value can be arranged or other numerical value manually)；
(3) outlet battery failures, battery forbid charging, the abnormal conditions of communication failure；
(4) the peak of power consumption period；
(5) receive stopping charging instruction.
Further, described controller 105 is according to the capacity of current LiFePO4 echelon set of cells and filling of electric vehicle
Electric demand information, calculates discharge power, then controls and disconnects net side catalyst, controls AC/DC module to be operated in inverter mode,
And inform charging equipment of electric automobile 300 output voltage electric current, discharged.
In a particular application, discharge off condition include following any one：
(1) in LiFePO4 echelon set of cells monomer minimum voltage be less than 2.5V (this value can be arranged or it manually
His numerical value)；
(2) AC/DC module dc bus total voltage is less than 40V (this value can be arranged or other numerical value manually)；
(3) charging electric vehicle terminates, energy-storage battery forbids electric discharge, the abnormal conditions of communication failure；
(4) the low power consumption period.
(5) receive stopping electric discharge instruction.
The two-way PCS of this utility model is not only the power converter of an execute instruction, also has energy hole stream
Function, peak interval of time setting function, management of charging and discharging function；This utility model utilizes technology by battery echelon, can effectively advise
Keep away the short slab at aspects such as service life, energy density for the lead-acid battery, the use of lithium iron phosphate dynamic battery can also be reduced simultaneously
Cost.
Above specific embodiment of the utility model is described.It is to be appreciated that this utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make various modifications or modification within the scope of the claims,
This has no effect on flesh and blood of the present utility model.
Claims (8)
1. a kind of communication base station ferric phosphate lithium cell echelon utilizes charge-discharge system it is characterised in that including：Bidirectional energy-storage unsteady flow
Device, echelon battery system and charging equipment of electric automobile, described bidirectional energy-storage current transformer be provided with exchange interface, DC interface,
Ethernet interface and CAN interface, described echelon battery system is provided with DC interface and CAN interface, wherein：Described bidirectional energy-storage
The exchange interface of current transformer connects electrical network or communication base station controller switching equipment, and the Ethernet interface of described bidirectional energy-storage current transformer connects
Switch in communication base station, the CAN interface of described bidirectional energy-storage current transformer connects the CAN interface of echelon battery system, described ladder
The DC interface of primary cell system connects the DC interface of described bidirectional energy-storage current transformer, and described charging equipment of electric automobile connects
Electrical network or communication base station controller switching equipment, connect the CAN interface of described bidirectional energy-storage current transformer simultaneously by CAN interface.
2. a kind of communication base station ferric phosphate lithium cell echelon according to claim 1 utilizes charge-discharge system, and its feature exists
In, described bidirectional energy-storage current transformer be provided with for energy flow control, peak interval of time setting, management of charging and discharging controller, described
Between controller and described charging equipment of electric automobile, information exchange, described controller and described echelon are carried out by CAN communication
Battery system carries out information exchange also by CAN communication.
3. a kind of communication base station ferric phosphate lithium cell echelon according to claim 2 utilizes charge-discharge system, and its feature exists
In described bidirectional energy-storage current transformer also includes：Charger information gathering part, battery information acquisition component, input and output logic
Control parts and clock unit, charger information gathering part, the outfan of battery information acquisition component connect the defeated of controller
Enter end, controller connects input and output logic control unit, clock unit is connected with controller.
4. a kind of communication base station ferric phosphate lithium cell echelon according to any one of claim 1-3 utilizes charge-discharge system,
It is characterized in that, described echelon battery system comprises multiple LiFePO4 echelon set of cells, described LiFePO4 echelon set of cells
It is placed in cabinet.
5. a kind of communication base station ferric phosphate lithium cell echelon according to claim 4 utilizes charge-discharge system, and its feature exists
In described echelon battery system comprises battery management system, described batteries management system and described LiFePO4 echelon battery
Group connects.
6. a kind of communication base station ferric phosphate lithium cell echelon according to claim 4 utilizes charge-discharge system, and its feature exists
In described echelon battery system is a 48V system, and its busbar voltage fluctuation scope is in 40～57V.
7. a kind of communication base station ferric phosphate lithium cell echelon according to any one of claim 1-3 utilizes charge-discharge system,
It is characterized in that, described charging equipment of electric automobile is electric automobile DC charging motor and/or electric vehicle alternating-current charging pile, institute
State electric automobile DC charging motor and/or electric vehicle alternating-current charging pile is provided with charging inlet.
8. a kind of communication base station ferric phosphate lithium cell echelon according to any one of claim 1-3 utilizes charge-discharge system,
It is characterized in that, described bidirectional energy-storage current transformer, echelon battery system and charging equipment of electric automobile are all by insulated cable
It is connected to electrical network or communication base station controller switching equipment.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110116657A (en) * | 2019-05-30 | 2019-08-13 | 江苏易飞特科技有限公司 | The power supply system and method for rail vehicle |
| CN110176778A (en) * | 2019-03-26 | 2019-08-27 | 国网天津市电力公司电力科学研究院 | A kind of distribution movable energy storage system |
| CN110572449A (en) * | 2019-09-04 | 2019-12-13 | 南京国电南自电网自动化有限公司 | Multi-channel cooperative communication system and method for BMS and PCS of energy storage power station |
-
2016
- 2016-07-27 CN CN201620801463.2U patent/CN205960753U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176778A (en) * | 2019-03-26 | 2019-08-27 | 国网天津市电力公司电力科学研究院 | A kind of distribution movable energy storage system |
| CN110116657A (en) * | 2019-05-30 | 2019-08-13 | 江苏易飞特科技有限公司 | The power supply system and method for rail vehicle |
| CN110572449A (en) * | 2019-09-04 | 2019-12-13 | 南京国电南自电网自动化有限公司 | Multi-channel cooperative communication system and method for BMS and PCS of energy storage power station |
| CN110572449B (en) * | 2019-09-04 | 2022-06-17 | 南京国电南自电网自动化有限公司 | Multi-channel cooperative communication system and method for BMS and PCS of energy storage power station |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A cascade charging and discharging system for lithium iron phosphate battery in communication base station Effective date of registration: 20220616 Granted publication date: 20170215 Pledgee: The Bank of Shanghai branch Caohejing Limited by Share Ltd. Pledgor: SHANGHAI ENNEAGON ENERGY TECHNOLOGY Co.,Ltd. Registration number: Y2022310000063 |
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Denomination of utility model: A step charging and discharging system for Lithium iron phosphate battery in communication base station Effective date of registration: 20230616 Granted publication date: 20170215 Pledgee: The Bank of Shanghai branch Caohejing Limited by Share Ltd. Pledgor: SHANGHAI ENNEAGON ENERGY TECHNOLOGY Co.,Ltd. Registration number: Y2023310000261 |