Background technique
The power supply source of existing communication base station includes alternating current, generator, solar energy, wind energy, battery etc., these energy turn
Changing and managing is completed by DC power system, and communication base station power supply block diagram is as shown in Figure 1.It is 1. DC power supply in figure
System, comprising: monitoring management unit 2., power input allocation unit 3., power conversion unit 4., power output allocation unit
⑤.Power input allocation unit realization different input energy sources are accessed and are distributed, power conversion unit can be AC/DC or
Input energy sources are converted to the negative 48V direct current of communication base station by person's DC/DC unit, and power output allocation unit realizes that negative 48V is straight
The output of galvanic electricity distributes and accesses battery and load, monitoring management unit collect power input allocation unit, power conversion unit,
The information of power output allocation unit, and control is managed to them.
Existing DC power system can use various energy resources, including alternating current, generator, wind energy, solar energy, battery
Deng, and support various energy resources access system simultaneously, such as use the oil-electricity system of generator and mains-supplied, using solar energy and
The gloss oil system of generator powered, using the honourable oil system of solar energy and generator and powered by wind energy.
Currently, a problem existing for communication base station is: being had to when in communication base station power supply system using multiple groups battery
Use same brand, identical new and old and same type multiple groups battery.Not so in system charging process due to charging coefficient not
Equally cause over-charging of battery or long-term undercharge, shortens the service life of battery;During discharge due to every group of electricity
The discharge curve in pond is inconsistent, there are problems that mutually charging between each group battery in discharge process.And due between battery
It mutually charges uncontrolled, cause cell damage or shortens the working life.
Simultaneously because cannot with suitable maximum current give battery pack charging, battery pack cannot maximum energy storage,
Energy waste is caused in system using oil machine, solar energy or wind power generation.
Existing DC power system uses modularized design, and power input allocation unit, power conversion unit, power are defeated
Allocation unit out, all using 19 inches of subrack designs of standard, it may be convenient to access and removal system, but existing power conversion list
Member only supports single group flow equalizing function, cannot achieve multiple groups voltage and current and is respectively set.
Existing DC power system also supports the energy input access at scene, and the system for such as using mains-supplied only needs
Increase DC/DC power conversion modules in systems, while configuring solar energy pole plate to realize on the basis of not increase system
Utilization to solar energy.AC/DC module is added in systems, while configuring blower, it can be on the basis of not increase system
Realize the utilization to wind energy.
Existing DC power system multiple groups battery is in parallel in systems, carries out the battery current and electricity of every group of battery respectively
Pressure detection, when battery management, are managed according to the battery pack of minimum charge current, it can be ensured that and every group of battery does not overcharge, but
It is to be unable to ensure every group of battery to charge all in accordance with most suitable voltage and current.
Existing DC power system generally comprises floating charge to battery management and fills, the even different product of different type battery
The equal float charge voltage of the battery of board is likely to inconsistent, overtension and too low will all cause cell damage.
Such as in the valve-control sealed lead acid battery generally used, float voltage setting is too low, battery is chronically at
Charge less electricity condition not only can form irreversible sulfation in accumulator pole intralamellar part, but also can be in active material and plate
High-resistance barrier is formed between grid, makes internal resistance increase, the capacity decline of battery.Float voltage setting is excessively high, and battery is long
Phase is in overcharge condition, battery charging current can be made to increase, the O2 gas that the H2 and anode that battery terminal negative is precipitated are precipitated
It is difficult to all be combined to H2O again, causes battery dehydration, grid corrosion accelerates, and service life terminates in advance.The feelings of normal floating charge
Under condition, charging current is minimum, and the O2 that the H2 and anode that battery terminal negative is precipitated are precipitated almost is combined to H2O.When filling
If electric current is excessive, gas is difficult to chemical combination again, will lead to internal storage battery air pressure increase, causes drain tap to be opened, cause to store
Battery dehydration.Therefore, it is filled or floating charge when will limit the charging current of battery in battery, referred to as " charging current limiter value ".
In most cases, cut-off current is between 0.05C~0.25C.
In the field of communications, in order to after exchange has a power failure battery can maintain longer time, the general battery that configures
Capacity is larger, and the discharge rate of battery is most of all in 0.02~0.05C within the scope of this.
If existing direct voltage system (including and is not limited to using different product using the battery of multiple groups different performance
Board, different type and different capabilities) when, battery management can only be by the battery of minimum capacity or the battery of minimum charging coefficient
As unified management object, due to that cannot be charged with suitable maximum current to battery pack, battery pack cannot store up to the greatest extent
Can, energy waste is caused in the system using oil machine, solar energy or wind power generation.
If existing direct voltage system is used in parallel using the battery of multiple groups different performance, due to the electric discharge of every group of battery
Curve is inconsistent, there are between each group battery mutual charge and discharge in discharge process and due to mutually charging between battery
It is uncontrolled, it cell damage or shortens the working life.
Summary of the invention
Provided herein is a kind of base station power system and the management methods of DC power supply multiple groups battery, can solve the relevant technologies
The problem of being had to when middle multiple groups battery using same brand, identical new and old and same type multiple groups battery.
Disclosed herein is a kind of base station power systems, including monitoring management unit and sequentially connected power input point
With unit, power conversion unit, power output allocation unit group and Parallel Control unit, the monitoring management unit and power are defeated
Enter allocation unit, power conversion unit, power output allocation unit group, Parallel Control unit are connected;
Wherein, the power conversion unit includes N number of power conversion modules, and the power output allocation unit group includes simultaneously
The N group power output allocation unit of connection;
In the power conversion unit each power conversion modules respectively with one group in the power output allocation unit group
The input terminal of power output allocation unit is connected, and the input terminal of each group power output allocation unit is also respectively connected with one group of battery,
The output end of each group power output allocation unit is connect with the Parallel Control unit:
The Parallel Control unit is realized and is distributed each group power output in parallel in the power output allocation unit group
Current detecting, load access between unit, and realize the parallel function of the power output allocation unit group.
Optionally, in above system, the power conversion unit is AC/DC or DC/DC, input energy sources is converted to logical
Interrogate the negative 48V direct current of base station equipment.
Optionally, in above system, each power conversion modules are by the monitoring management unit in the power conversion unit
Grouping setting voltage, threshold currents and packet number.
Optionally, in above system, the power output allocation unit group, realize negative 48V direct current output distribution with
And short-circuit or overvoltage protection, and access battery and load.
Optionally, in above system, the Parallel Control unit, including voltage and current detection circuit, preferential output control
Circuit and prevent mutual charging circuit between battery;
The voltage and current detection circuit monitors voltage between different groups of power output allocation unit in real time and with load
Situation;
The preferential output control circuit, according to the electricity between the power output allocation unit of the different groups monitored in real time
It presses and with situation is carried, controls main battery preferentially band load according to the requirement of monitoring management unit;
It is described to prevent mutual charging circuit between battery, according to different battery pack parallel connection powering loads, and prevent not
With mutually charging between battery pack.
There is disclosed herein a kind of management methods of DC power supply multiple groups battery, comprising:
Base station power system accesses one or more energy by power input allocation unit, turns by power conversion unit
It turns to negative direct current, negative 48V direct current and each group battery and is connected to Parallel Control unit by power output allocation unit group,
Control according to monitoring management unit is that load supplying and battery charge;
Wherein, the power conversion unit includes N number of power conversion modules, and the power output allocation unit group includes simultaneously
The N group power output allocation unit of connection;
In the power conversion unit each power conversion modules respectively with one group in the power output allocation unit group
The input terminal of power output allocation unit is connected, and the input terminal of each group power output allocation unit is also respectively connected with one group of battery,
The output end of each group power output allocation unit is connect with the Parallel Control unit.
Optionally, in the above method, the power conversion unit uses AC/DC or DC/DC, by the energy conversion of input
For the negative 48V direct current of communication base station equipment.
Optionally, the above method further include:
The voltage of each power conversion modules, threshold currents in the power conversion unit is arranged in the monitoring management unit grouping
And packet number.
Optionally, the above method further include:
Voltage and current detection circuit in the Parallel Control unit, monitor in real time different groups power output allocation unit it
Between voltage and with carry situation;
Preferential output control circuit in the Parallel Control unit, according to the power output point of the different groups monitored in real time
With the voltage between unit and with situation is carried, according to the requirement control main battery of monitoring management unit preferentially with load.
Optionally, the above method further include:
The Parallel Control unit prevents between different battery packs mutually according to different battery pack parallel connection powering loads
Charging.
Technical scheme provides the scheme of a kind of DC power supply multiple groups battery group and management in parallel, improves electricity
The battery management ability of source system, may be implemented the personality management of communication base station difference battery, straight in a set of operational process
Stream power-supply system can be used different brands, different capabilities, different type and Bu Tong new and old various batteries.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment pair
Technical solution of the present invention is described in further detail.It should be noted that in the absence of conflict, embodiments herein and
Feature in embodiment can be arbitrarily combined with each other.
Present inventor has to when finding in communication base station power supply system using multiple groups battery using same brand, phase
With new and old and same type multiple groups battery.Not so cause over-charging of battery since charging coefficient is different in system charging process
Or long-term undercharge, the service life of battery can be shortened;During discharge since the discharge curve of every group of battery is different
It causes, there are problems that mutually charging between each group battery in discharge process.And it is uncontrolled due to mutually charging between battery,
It will cause cell damage or shorten the working life.Simultaneously because cannot be charged with suitable maximum current to battery pack, battery
Group cannot maximum energy storage, cause energy waste in the system using oil machine, solar energy or wind power generation.
Based on above-mentioned discovery, the present embodiment provides a kind of base station power systems, including monitoring management unit, power input point
With unit, power conversion unit, power output allocation unit group and Parallel Control unit.
Monitoring management unit and power input allocation unit, power conversion unit, power output allocation unit group and in parallel
Control unit is all connected with, and mainly collects power input allocation unit, power conversion unit, power output allocation unit, parallel connection
The information of control unit, and control is managed to them.
Specifically, monitoring management unit may include Ethernet interface and all the way RS232 interface all the way, be used for backstage group
Net, so as to be monitored management to power-supply system by backstage.
Power input allocation unit is accessed and is distributed for realizing to different input energy sources, input termination alternating current,
The input of the energy such as generator, solar energy, wind energy, output termination power conversion unit;
Power conversion unit can be AC/DC DC/DC unit, set for input energy sources to be converted to communication base station
Spare negative 48V direct current, input termination power input allocation unit, output termination power output allocation unit, wherein base
Power-supply system of standing interior power includes how many groups of batteries, and power conversion unit just includes how many a power conversion modules, i.e. a function
Rate conversion module corresponds to the one power output allocation unit transformation of power output allocation unit to provide accordingly for corresponding battery
Operation.For different battery packs, it can be grouped by monitoring management unit and the corresponding power conversion modules of the battery pack are set
Voltage, threshold currents and packet number.
In addition, the power conversion unit can also be required according to the control of monitoring management unit, different capacity output is realized
Parallel-current equalization function between allocation unit group reaches the power conversion unit between different capacity output allocation unit group
Output is balanced.It may also be noticed that being, power conversion unit can also become whole power when not needing to carry out battery group management
Change the mold block parallel output.
Power output allocation unit group is realized output distribution and short circuit or the overvoltage protection of negative 48V direct current, and is accessed
Battery and load, input termination power conversion unit and battery, output termination Parallel Control unit.Wherein, base station power
System interior power includes how many groups of batteries, and power output allocation unit group just includes how many groups of power output allocation units, i.e., one
A power output allocation unit corresponds to one group of battery and provides power output distribution control.
Parallel Control unit, including voltage and current detection circuit, preferential output control circuit and prevent between battery mutually
Charging circuit, it is defeated for realizing current detecting, load access and grouping and parallel function between power output allocation unit group
Enter termination power output allocation unit group, exports terminating load and another group of power output allocation unit group.
Wherein, voltage and current detection circuit, voltage between different groups can be monitored in real time and with carrying situation;
Preferential output control circuit, can (control i.e. under monitoring management unit refers to according to the requirement of monitoring management unit
Enabling) preferentially band carries control main battery (one group of battery in i.e. pre-defined multiple groups battery is main battery);
Mutual charging circuit between battery is prevented, having prevents mutual charging circuit between battery pack, realizes different groups of electricity
Pond parallel connection powering load, and can prevent from mutually charging between battery pack.
Base station power system interior power is divided into advance it should be noted that battery pack involved in the application refers to
Multiple battery packs, each battery pack may include a battery, or including multiple same brands, identical new and old program, identical
Multiple batteries of type.This application is not particularly limited.
In addition, the present embodiment also provides a kind of management method of DC power supply multiple groups battery, comprising:
Base station power system accesses one or more energy by power input allocation unit, turns by power conversion unit
It turns to negative direct current, negative 48V direct current and each group battery and is connected to Parallel Control unit by power output allocation unit group,
Control according to monitoring management unit is that load supplying and battery charge;
Wherein, power conversion unit includes N number of power conversion modules, and the power output allocation unit group includes in parallel
N group power output allocation unit;
In power conversion unit each power conversion modules respectively with one group of power in the power output allocation unit group
The input terminal for exporting allocation unit is connected, and the input terminal of each group power output allocation unit is also respectively connected with one group of battery, each group
The output end of power output allocation unit is connect with the Parallel Control unit.
Wherein, the above method can rely on above-mentioned base station power system and realize, therefore the specific implementation details of the above method can join
See the related content of above-mentioned base station power system, details are not described herein.
Illustrate the specific implementation of above scheme with reference to the accompanying drawing.
Fig. 2 show the specific example of the application, the base station power system schematic of two groups of battery group management.It should
Base station power system include monitoring management unit (22), power input allocation unit (23), power conversion unit (24A) and
(24B), power output allocation unit group A (25A), power output allocation unit group B (25B), Parallel Control unit (26).Power
Allocation unit group A connection battery pack 1, power output allocation unit group B connection battery pack 2 are exported, while power output distribution is single
Tuple connects Parallel Control unit.
Monitoring management unit connects power input allocation unit, power conversion unit, power output allocation unit, simultaneously respectively
Join control unit, carries out signal acquisition, battery management, system control.
Power input allocation unit realizes access and distribution to different input energy sources.Its input terminal includes multichannel AC
Input is spaced apart to be switched with protective device and switching, is also spaced apart comprising multi-channel DC input, is connect alternating current, generator, solar energy, wind energy
Equal energy input, output end includes power interface plate, for connecing power conversion unit.
Power conversion unit may include AC/DC module and DC/DC module, and it is negative that input energy sources are converted to communication base station use
48V direct current.It inputs termination power input allocation unit, and output termination power output allocation unit can be according to monitoring
The control instruction of administrative unit controls each power conversion modules, to realize the parallel connection electricity between different capacity output allocation unit group
Equalization function is flowed, and whole power conversion unit parallel current-sharing exports when not needing to be grouped management.In this example, function
Rate converter unit is divided into two power conversion modules (4A) and (4B).
Power output allocation unit group A realizes that the output of negative 48V direct current distributes and accesses battery and load.It is inputted
Termination power converter unit, output end includes protective device, is spaced apart, for connecing Parallel Control unit and battery pack 1;
In this example, battery pack 1 is used as main battery, can configure cycle-index height, the big circular form battery of charging current
Main battery as heat recovery.The main battery is reserved when configuring power conversion unit grouping simultaneously suitably to fill
Electric current loading electric current;
Power output allocation unit group B realizes that the output of negative 48V direct current distributes and accesses battery and load.It is inputted
Termination power converter unit, output end include be spaced apart, protective device, for connecing Parallel Control unit and battery pack 2.
Specifically, Parallel Control unit may include voltage and current detection circuit, preferential output control circuit and prevent electricity
Mutual charging circuit between pond.
The course of work of above-mentioned base station power system is described in detail again below.
The one or more energy such as alternating current, generator, solar energy, wind energy is empty by the input of power input allocation unit
It opens and switches switch access system, and power conversion unit is connected to by power interface plate, be converted by AC/DC and DC/DC
Negative 48V direct current, negative 48V direct current are connected to Parallel Control unit and battery by being spaced apart for power output allocation unit, are negative
Carry power supply and battery charging.
Voltage controls in charging process: since Parallel Control unit prevents mutual charging circuit between battery pack, i.e., 2 groups
It will not mutually power between battery, and 2 groups of batteries can only power to the load.Monitoring management unit can be respectively according to battery pack 1
It requires to charge respectively with the float charge voltage of battery pack 2, makes 2 groups of batteries that can charge with most suitable voltage.As primary electricity
Its anti-circnit NOT can be bypassed by contactor, be made as the energy loss between primary battery pack 1 and load more by pond group 1
It is small.
Current control in charging process: monitoring management list is sent on Parallel Control unit detection group A and group B load current value
Member.Monitoring management unit controls A group power conversion unit cut-off current according to load A group electric current and 1 performance related parameter of battery, and
Dynamic updates the cut-off current.Calculation formula is as follows:
Power conversion unit group A cut-off current=(load A group electric current+1 capacity of charging current ratio × battery pack)/A group function
Rate converter unit quantity.
Similarly, monitoring management unit controls B group power conversion list according to load B group electric current and 2 performance related parameter of battery
First cut-off current.
Power conversion unit group 1 is respectively set according to the battery management demand of various batteries for monitoring management unit and power becomes
The output voltage and electric current of unit group 2 are changed, realizes the separated charging of two groups of batteries, it can be according to the maximum charge system of respective battery
Number charges, and realizes the abundant storage of the energy.
If exchange has a power failure in short-term in charging process, battery pack 1 and battery pack 2 are supplied by Parallel Control unit to load
Electricity, battery pack 1 are used as main battery, and administrative unit in parallel bypasses its anti-circnit NOT by D.C. contactor, obtain compared with battery pack 2
Lower loop pressure drop realizes the preferential powering load of main battery.
After battery is full of, monitoring management unit control system disconnects energy input, is load supplying by battery, at this time may be used
It controls and accesses administrative unit in parallel, the few standby electricity of another set cycle-index as the battery of primary cycle-index high circulation type
Type battery can disconnect and the connection of administrative unit in parallel;The contactor closure being attached thereto in administrative unit in parallel is controlled simultaneously,
Load circuit pressure difference is reduced to which battery is participated in energy circulation, reduces the runing time of generator, the band for improving generator carries
Rate reduces oil consumption.Battery can store extra solar energy in solar energy abundance simultaneously, and when solar energy is insufficient, battery is put
Electricity, to use solar energy resources to greatest extent.
When circular form battery discharge is lower to voltage, Parallel Control unit controls A group bypass D.C. contactor and disconnects, and prevents
It only mutually charges in battery discharge procedure, then controls B group bypass contactor closure, while monitoring management unit is closed another set
Cycle-index lacks storing electricity battery and accesses administrative unit in parallel, powers off load equipment not, extends system charging time.
When 2 groups of batteries all discharge into low-voltage and system energy input is insufficient, system can be according to load important degree
Lower electric protection is carried out, disconnects load successively to protect battery.
Monitoring management unit is according to battery capacity, cell voltage, battery current, battery charging coefficient, the internal resistance of cell, battery
The battery managements demand control Parallel Control such as temperature-compensating unit, power conversion unit and power output allocation unit group grouping and
Parallel operation realizes the grouping and management in parallel of battery.
Monitoring management unit equally can rationally divide according to battery SOC and battery SOH, preestimating battery cycles left number
With preferentially use battery, make 2 groups at the same time section reach maximum service life (MSL).Electricity can be replaced when system maintenance at the same time
System maintenance number is reduced in pond.
Since the battery between respectively realizes grouping management, circular form and standby can be configured in same DC power supply simultaneously
Two kinds of batteries of electric type had not only met high efficiency of energy storage but also had met the high reliability of communication power supply power supply.
It is noted that two groups of batteries that the battery group of the application and management in parallel are not limited merely in this example
Power-supply system, the application can be extended to the power-supply system of multiple groups battery.
The DC power system energy input of the application is also not limited to generator, the energy input of every power-supply system
It can include one or more of alternating current, generator, solar energy, wind energy.
The acquisition of all of above information and the management of battery and the control of system are realized by monitoring management unit
, there are also 1 road Ethernet interfaces and 1 tunnel RS232 interface for monitoring management unit, for realizing backstage networking, so as to pass through
More easily realize the monitoring and management of power-supply system in backstage.
From above-described embodiment as can be seen that technical scheme, can be used in new site two groups of different brands and
The battery while parallel operation of different performance;It can use the original battery of old website, it is standby that one group of new battery raising system can be increased
The electric time improves the load capacity and functional reliability of DC power system, reduces build a station cost and the dilatation cost of website.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program
Related hardware is completed, and described program can store in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, one or more integrated circuits can be used also to realize in all or part of the steps of above-described embodiment.Accordingly
Ground, each module/unit in above-described embodiment can take the form of hardware realization, can also use the shape of software function module
Formula is realized.The application is not limited to the combination of the hardware and software of any particular form.
The above, preferred embodiments only of the invention, is not intended to limit the scope of the present invention.It is all this
Within the spirit and principle of invention, any modification, equivalent substitution, improvement and etc. done should be included in protection model of the invention
Within enclosing.