CN108879921A - A kind of accumulator charging/discharging system of recyclable electric energy - Google Patents
A kind of accumulator charging/discharging system of recyclable electric energy Download PDFInfo
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- CN108879921A CN108879921A CN201811012547.8A CN201811012547A CN108879921A CN 108879921 A CN108879921 A CN 108879921A CN 201811012547 A CN201811012547 A CN 201811012547A CN 108879921 A CN108879921 A CN 108879921A
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- bus
- battery
- power module
- electric
- charge
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
Abstract
A kind of accumulator charging/discharging system of recyclable electric energy, it include the power module for connecting alternating current network, it is multiple the bidirectional DC/DC charge/discharge unit of power module is connected to by DC bus, power module DC bus is connected to and picks out the main control unit of end, is connected to the electric-heating assembly of main control unit, the main control unit is connect by communication bus with each bidirectional DC/DC charge/discharge unit；The bus battery being made of multiple batteries is also connected on the DC bus, and the bus battery current sensor that the main control unit is connect on DC bus connecting line with the supply current sensor and bus battery being arranged on DC bus is separately connected；It using the dispatching method of " hanging up application-delay to execute " has the characteristics that charge or discharge process is farthest avoided to be interrupted；In addition to power module, system works in the DC low-voltage state of safety, low cost.
Description
Technical field
The present invention relates to a kind of accumulator charging/discharging systems of recyclable electric energy.
Background technique
Battery applications are extensive, such as electric car, electric bicycle, electric tool, charger baby；Battery production,
In maintenance process, need repeatedly, repeatedly charging and discharging；Recording capacity, voltage, electric current, rise etc. are joined in charge and discharge process
Number；When electric discharge, battery releases electric energy；When charging, battery absorbs electric energy.
There are many electric energy that method carrys out treatment of battery release at present.First kind method is：Using light bulb or heating wire, with straight
The mode of sending and receiving heat consumes electric energy, and this method is simple, is easily achieved, but disadvantage is obvious：Such as waste of energy；Largely, repeatedly
Fever, so that charging/discharging apparatus itself is unreliable, easily damaged；Meanwhile working environment high temperature is also resulted in, ventilation, heat extraction are difficult.
Huge discharge ventilation strip carrys out noise.
Second class method is：It is converted by DC-AC, the electric energy that battery is discharged is fed to mains network.Such side
The advantages of method is energy saving；Do not generate heat directly, a series of problems also just not generated by fever.But technically
It is related to " high voltage " and " high current " simultaneously, causes to realize that difficulty is big, at high cost.In addition, can also be caused to electricity network centainly
The harmonic pollution of degree, and face grid-connected license issue.
Third class method is：Using local DC bus, but exist obvious insufficient.Such as Patent No. 03256921.1 is public
In the technical solution opened, not on " direct current master tape M ", usable bus battery is stored up in setting, fills so that being greater than in discharge electricity amount
When power consumption, has to consume redundance by " electronic load ", lead to waste of energy；Charging, discharge operation are not more referred to
" hang up application-delay execute " processing method.For another example in technical solution disclosed in Patent No. 200510035713.2, do not have yet
There is setting bus battery；If " positive pole line voltage is higher than a certain setting value, and computer machine control system will be switched off partial discharge state
Under circuit ", also with regard to when have to interrupt discharge process；In this way, charge and discharge process will be discontinuous, this will lead to battery point
Gross error is generated when appearance, combo.Authorization Notice No. is that it is female to use direct current in technical solution disclosed in CN 201877857U
Line is not provided with bus battery；It is at high cost, safety is poor meanwhile because its DC bus-bar voltage is up to 590VDC.
Summary of the invention
It is an object of the invention to overcome the shortcomings of the prior art, and provide a kind of using " hang-up application-delay is held
The dispatching method of row ", farthest avoids charge or discharge process from being interrupted, in addition to power module, system works in direct current
Low-voltage state, in favor of safety, the accumulator charging/discharging system for the recyclable electric energy for reducing system cost.
The object of the present invention is achieved by the following technical solutions, a kind of battery charge and discharge of recyclable electric energy
Electric system, it includes power module, the multiple bidirectional DC/DCs that power module is connected to by DC bus for connecting alternating current network
Charge/discharge unit is connected to the electric heating that power module DC bus picks out the main control unit of end, is connected on DC bus
Component, the main control unit are connect by communication bus with each bidirectional DC/DC charge/discharge unit；Described is straight
The bus battery being made of multiple batteries, and the power module, bus battery and DC bus are also connected on stream bus
Between be respectively equipped with current sensor, the current sensor is connected respectively to main control unit.
As preferred：The electric-heating assembly is made of multiple heating wire or electrical bar series and parallel, the main control list
Member and setting electric heating current sensor on electric-heating assembly connecting line；The lower part of the electric heating current sensor, is additionally provided with and master control
The electronic switch that unit processed is connected, the bus battery are formed by multiple battery series and parallels, and the bidirectional DC/DC fills
The respective external battery being charged or discharged of discharge cell, and make electric energy between each battery of internal system, battery with
Between bus battery, it is transferred, stored, is recycled by DC bus.
The method have the characteristics that：
1) have benefited from the DC bus and bus battery in system, when electric discharge, the electric energy that battery is discharged is not direct
It is converted into thermal energy；But the DC bus shared by each bidirectional DC/DC charge/discharge unit, it is transferred to other to be charged in system
Battery or it is stored in shared bus battery.Realization recycles electric energy.
2) it is based on communication network, utilizes the dispatching method of " hanging up application-delay to execute ", each bidirectional DC/DC charge/discharge unit
Automatically dispatch its charging, discharge operation.Charge or discharge process is farthest avoided to be interrupted.
3) electric energy is not fed to electricity network, only recycles in internal system；It is not related to " high voltage ", safety is good,
To electricity network no-harmonic wave pollution.
4) DC bus, bus battery are preferred using DC low-voltage with 12-60VDC.
5) in addition to power module, system works in DC low-voltage state, in favor of safety, reduces system cost.Together
When,
So that corresponding DC bus, bus battery are easy to purchase, configuration.
By taking the electric bicycle of a routine as an example, the battery group of 4 section 12V 20AH (ampere-hour) is configured.One-time detection is filled
Electric discharge 2 times, 2 times the discharged electric energy of electric discharge can be calculated as：
4 section x 12V x 20AH x, 2 times=1.92 kilowatt hour (degree)
With 80% electric discharge transfer efficiency, estimation is guarded, electric energy can be saved：
0.8x (4 section x 12V x 20AH x 2 times)=1.536 kilowatt hours (degree)
It follows that energy-saving benefit is considerable in large-scale production, maintenance free cell.
Detailed description of the invention
Fig. 1 is system principle of compositionality figure of the invention.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings：It is of the present invention a kind of Ke Xunhuanliyong shown in Fig. 1
The accumulator charging/discharging system of electric energy, it include connect alternating current network power module (2), it is multiple by DC bus (1) even
It is connected to the bidirectional DC/DC charge/discharge unit (5) of power module (2), is connected to the master that power module (2) DC bus picks out end
Control unit (4), the electric-heating assembly (8) being connected on DC bus, the main control unit (4) pass through communication bus (7)
It is connect with each bidirectional DC/DC charge/discharge unit (5)；It is also connected on the DC bus (1) by multiple batteries
The bus battery (3) of composition, and electric current is respectively equipped between the power module (2), bus battery (3) and DC bus (1)
Sensor (10), the current sensor (10) are connected respectively to main control unit (4).
As shown in the figure：The electric-heating assembly (8) is made of multiple heating wire or electrical bar series and parallel, the master control
Electric heating current sensor (11) are set on unit (4) processed and electric-heating assembly (8) connecting line；The electric heating current sensor (11)
Lower part is additionally provided with the electronic switch (9) being connected with main control unit (4), and the bus battery (3) is by multiple batteries
Series and parallel forms, the respective external battery (6) being charged or discharged of the bidirectional DC/DC charge/discharge unit (5), and electric energy is made to exist
Between each battery of internal system, between battery and bus battery, it is transferred, is stored by DC bus, recycling benefit
With power module, bus battery, charge/discharge unit in system can repeat to configure multiple object instances.
Embodiment：The effect of each component of the invention is：
A) DC bus 1 is used to connect all parts, between the components transmitted in both directions electric energy.DC bus is maintained
Voltage (such as 24V) is always above the voltage (such as 12V) for being charged or discharged pond.Larger, to be charged or discharged pond quantity more
System in, use copper bar, preferably to carry high current.
B) the common Switching Power Supply in market can be selected in power module 2.It can obtain electric energy from electricity network, and output is stablized
DC voltage (a small range adjustable) arrive DC bus.Included excess current protective function.When it is each be electrically charged battery needed for
Electric energy, greater than each electric energy for being discharged battery and being discharged, and when bus battery is also not enough to provide institute's electricity demand, direct current
Busbar voltage can decline.When DC bus-bar voltage is lower than the output voltage of power module, power module starts to feed to system
Electric energy is allowed to be unlikely to too low to maintain busbar voltage, prevents bus battery overcurrent, over-discharge.This is nature and smooth
Process.
C) bus battery 3 is direct or via bus battery management unit, the battery pack being articulated on DC bus.It can
Pass through parallel connection by multiple single batteries, be composed in series.Play storage, release electric energy.Meanwhile bus battery is equivalent to great Rong
The capacitor of amount can play the buffer function of stable busbar voltage.Bus cell voltage (such as 24V), is always above electric power storage
The voltage (such as 12V) in pond.
When the electric energy (power) for being discharged battery and being discharged, taken greater than the electric energy (power) for being electrically charged battery, by mother
Line battery receptacle, the electric energy for storing redundance.When bus battery charge is full, it is not enough to receive, storage redundance electric energy
When, start electric-heating assembly, initiatively, with heating system consumed, to maintain system to stablize.
The electric energy needed for being electrically charged battery, when greater than being discharged electric energy that battery is discharged, bus battery automatic discharging,
Electric energy needed for supplying charging.When bus battery is also not enough to provide institute's electricity demand, then automatically, by power module from alternating current
Network obtains electric energy, to maintain needed for system.
D) main control unit 4 realizes 2 major functions：
First is that the following crucial system parameter of acquisition:
The supply electric current of power module；
The electric current (or power configuration situation) of electric-heating assembly；
Charging or discharging current (two-way), the voltage of bus battery；
DC bus-bar voltage.
Together with configuration parameter, the bus battery capacity configuration parameter etc. of power module power, together by communication bus, divide
Issue each charge/discharge unit.
Second is that estimating bus battery charge state according to busbar voltage, bus battery current.Control the electric-heating assembly (side PWM
Formula), with heating system, initiatively consume bus battery be not enough to receive, the part electric energy of storage, prevent the over-voltage of bus battery,
It overcharges, system is maintained to stablize.
E) charge/discharge unit 5 is the core component of system, is based on bidirectional DC/DC shift theory.By single-chip microcontroller, field-effect tube
(MOSFET), the main elements such as radiator, small-sized axial flow fan form.Single-chip microcontroller executes program, according to the current state of system
(power module feed electric current, electric-heating assembly electric current (or power configuration situation), bus battery charging and discharging stream, DC bus-bar voltage,
Power module power, bus battery capacity) it is required according to technique, the charge and discharge for executing the modes such as constant current, constant pressure to battery are grasped
Make, and shows, records the parameters such as its electric current, voltage, ampere-hour.The working power of itself, is also derived from DC bus.
In system, multiple charge/discharge units can be configured.Each unit, the battery that a termination is charged or discharged, the other end
It is connected in parallel to DC bus.That is, charge/discharge unit connects between battery and DC bus.It has 2 main working conditions：
First is that charged state.When needing to charge, if bus battery, power module, it is sufficient to provide needed for this time charging
Electricity, charge/discharge unit are directly entered charged state, execute charging operations；Otherwise, this charging application, waiting system item are hung up
When part meets, then automatic execution charging operations.
When to battery charging, charge/discharge unit works in such a way that BUCK is depressured, and electric energy is drawn from DC bus.From straight
The electric energy drawn on stream bus, the electric energy that a part is discharged from other charge/discharge units to discharge, another part come
From bus battery.When bus battery is not enough to provide charging institute's electricity demand, then automatically, obtained by power module from electricity network
Electric energy is taken, to maintain needed for system.
Second is that discharge condition.When needing to discharge, if bus battery, electric-heating assembly, it is sufficient to absorb or consumption is this time discharged
The electricity discharged, charge/discharge unit are directly entered discharge condition, execute discharge operation；Otherwise, this application is hung up, system is waited
When system condition meets, then automatic execution discharge operation.
When to electric power storage tank discharge, charge/discharge unit draws (release) electric energy with the work of BOOST boosting mode, from battery.
By DC bus, a part of electric energy by other units to charge be transferred to it is corresponding be electrically charged battery, another part,
By bus battery storage.When bus battery charge is full, is not enough to receive, stores redundance electric energy, then by main control list
Member controls electric-heating assembly via electronic switch, initiatively, with heating system is consumed, so that system voltage be maintained to stablize.
F) battery 6 is the target for needing to charge, discharge.It can be single battery, be also possible to by multiple monomers
The battery pack that battery is connected, composed in parallel.
G) in 7 realization system of communication bus each component interconnection.Main control unit passes through communication bus, conveyer system parameter
To each charge/discharge unit；Charge/discharge unit realizes itself function according to these parameters.It is collected simultaneously each charge/discharge unit
Operating status.
H) electric-heating assembly 8.Main control unit controls the electronic switch between electric-heating assembly and DC bus with PWM mode,
Prevent electric-heating assembly initiatively, with heating system consumes system from the electric energy that shifts, store.
The present invention in a particular embodiment, mainly considers following two aspects：
It on the one hand is the capacity configuration of bus battery：When system is run, by production scheduling, the charge and discharge of battery are deployed
Ratio can make bus battery be in the idle state for neither charging nor discharging.Also that is, what battery was discharged when discharging
Electricity, the other batteries all to be charged absorb.This is perfect condition, does not also need power module from electricity network
Take electricity.
Terrifically, when battery whole in system discharges simultaneously, bus battery is needed to absorb maximum electric energy.Bus
Battery capacity can be calculated as follows:
Cbus=(N*Cb*0.8)/0.3；
Note：Cbus：Bus battery capacity (ampere-hour)；
N：Battery quantity in system, that is, charge/discharge unit quantity；
0.3：Bus battery rate of charge；
0.8：Estimation transfer efficiency when electric power storage tank discharge.
But, in practice, bus battery capacity can be suitably reduced, because：
First is that can be asked using " hanging up application-delay to execute " mode, the electric discharge that charge/discharge unit delay executes battery
It asks.Suitable opportunity is namely waited, then starts to discharge.In that way it is possible to avoid consuming electric energy with heating system completely.Charge and discharge
Single-chip microcontroller in unit executes program, realizes " hanging up application-delay to execute " function with can be convenient.
Second is that battery whole in system discharges simultaneously, it is egregious cases, battery can be deployed by production scheduling
Charge and discharge ratio, mitigate bus battery energy storage pressure；It is, the charge capacity and discharge electricity amount of allotment battery, to the greatest extent
Amount is allowed to balance.
Third is that when more battery is badly in need of electric discharge, and when production scheduling is difficult to deploy charge and discharge ratio, main control list
Member plays a role:Electric-heating assembly is controlled, with heating system, consumes part electric energy.
In practice, estimating system median generatrix battery capacity, is aided with rational management as the following formula, and system can be with stable operation:
Cbus=N*Cb；
Also that is, bus battery capacity and battery total capacity are roughly the same.
It on the other hand is the power configuration of power module：Terrifically, when battery whole in system, while with maximum
Constant-current charge, and when bus battery has been vented (charged is 0%), system institute electricity demand is derived from electricity network completely.It can
The power of power module is calculated as follows:
N*P=N*Vb*Cb*0.15；
Note：n:Power module quantity；
P：Power module output power；
N：Battery quantity in system, that is, charge/discharge unit quantity；
Vb：Nominal battery voltage；
Cb：Accumulator capacity (ampere-hour)；
0.15：Battery rate of charge；
Similarly, using the method for " hanging up application-delay to execute ", the charging that charge/discharge unit delay executes battery is asked
It asks.Suitable opportunity is namely waited, then is started to charge.The configuration power of power module can be reduced in this way, to reduce and be
System cost.
In practice, as the following formula in estimating system power module configuration power, be aided with rational management, system can stablize fortune
Row:
N*P=(N*Vb*Cb*0.15) * 0.5.
Claims (2)
1. a kind of accumulator charging/discharging system of recyclable electric energy, it includes the power module for connecting alternating current network（2）, it is more
It is a to pass through DC bus（1）It is connected to power module（2）Bidirectional DC/DC charge/discharge unit（5）, be connected to power module（2）Directly
Stream bus picks out the main control unit of end（4）, the electric-heating assembly that is connected on DC bus（8）, it is characterised in that it is described
Main control unit（4）Pass through communication bus（7）With each bidirectional DC/DC charge/discharge unit（5）Connection；The direct current
Bus（1）On be also connected with the bus battery being made of multiple batteries（3）, and the power module（2）, bus battery（3）
With DC bus（1）Between be respectively equipped with current sensor (10), the current sensor (10) is connected respectively to main control list
Member（4）.
2. the accumulator charging/discharging system of recyclable electric energy according to claim 1, it is characterised in that the electricity
Hot component（8）It is made of multiple heating wire or electrical bar series and parallel, the main control unit（4）With electric-heating assembly（8）Connection
Electric heating current sensor (11) are set on line；The lower part of the electric heating current sensor (11), is additionally provided with and main control unit（4）
The electronic switch being connected（9）, the bus battery（3）It is formed by multiple battery series and parallels, the bidirectional DC/DC fills
Discharge cell（5）The respective external battery being charged or discharged（6）, and make electric energy between each battery of internal system, store
Between battery and bus battery, it is transferred, stored, is recycled by DC bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012547.8A CN108879921A (en) | 2018-08-31 | 2018-08-31 | A kind of accumulator charging/discharging system of recyclable electric energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012547.8A CN108879921A (en) | 2018-08-31 | 2018-08-31 | A kind of accumulator charging/discharging system of recyclable electric energy |
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| CN108879921A true CN108879921A (en) | 2018-11-23 |
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Citations (6)
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| CN205231778U (en) * | 2015-11-25 | 2016-05-11 | 成都迅能达电源科技有限公司 | Battery internalization becomes to fill discharge device and internalization becomes charging and discharging equipment |
| WO2018021130A1 (en) * | 2016-07-26 | 2018-02-01 | 日本電気株式会社 | Electricity storage system, charging and discharging control device and control method, and recording medium having program recorded thereon |
| CN209029971U (en) * | 2018-08-31 | 2019-06-25 | 黄根池 | The accumulator charging/discharging system of Ke Xunhuanliyong electric energy |
-
2018
- 2018-08-31 CN CN201811012547.8A patent/CN108879921A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231546A (en) * | 2011-06-30 | 2011-11-02 | 武汉市菱电汽车电子有限责任公司 | Battery management system with balanced charge and discharge functions and control method thereof |
| CN102709976A (en) * | 2012-06-01 | 2012-10-03 | 张家港市泓溢电源科技有限公司 | Common bus energy-saving recovery type storage battery charging-discharging power supply equipment |
| CN104158273A (en) * | 2014-08-07 | 2014-11-19 | 东莞市冠佳电子设备有限公司 | Battery forming and capacity grading system |
| CN205231778U (en) * | 2015-11-25 | 2016-05-11 | 成都迅能达电源科技有限公司 | Battery internalization becomes to fill discharge device and internalization becomes charging and discharging equipment |
| WO2018021130A1 (en) * | 2016-07-26 | 2018-02-01 | 日本電気株式会社 | Electricity storage system, charging and discharging control device and control method, and recording medium having program recorded thereon |
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