CN107706998A - A kind of charge and discharge device and electrical energy storage systems - Google Patents

A kind of charge and discharge device and electrical energy storage systems Download PDF

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Publication number
CN107706998A
CN107706998A CN201711129566.4A CN201711129566A CN107706998A CN 107706998 A CN107706998 A CN 107706998A CN 201711129566 A CN201711129566 A CN 201711129566A CN 107706998 A CN107706998 A CN 107706998A
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CN
China
Prior art keywords
module
energy
discharge
storage
resistance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711129566.4A
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Chinese (zh)
Inventor
文午
张伟先
胡润文
柯建明
陈朝晖
付鹏
李玉梅
付亚娥
张婷婷
陈盛才
言果
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Zhuzhou Locomotive Co Ltd
Original Assignee
CRRC Zhuzhou Locomotive Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CRRC Zhuzhou Locomotive Co Ltd filed Critical CRRC Zhuzhou Locomotive Co Ltd
Priority to CN201711129566.4A priority Critical patent/CN107706998A/en
Publication of CN107706998A publication Critical patent/CN107706998A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068Battery or charger load switching, e.g. concurrent charging and load supply
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04Regulation of charging current or voltage
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices

Abstract

This application discloses a kind of charge and discharge device, including:Commutation inversion module, energy-storage module, bidirectional DC/DC module, discharge resistance module;Wherein, the output end of power network and the first end of commutation inversion module connect, second end of commutation inversion module and the first end of energy-storage module connect, second end of energy-storage module is connected with the first end of bidirectional DC/DC module, second end of bidirectional DC/DC module is connected with the first end of discharge resistance module, and the second end of discharge resistance module is connected with outside energy storage device.Using the charge and discharge device in the present invention, charge and discharge device can be not only reduced to inputting the capacity requirement of power network, and also improve the utilization rate of energy.Accordingly, a kind of electrical energy storage systems provided by the invention equally have above-mentioned beneficial effect.

Description

A kind of charge and discharge device and electrical energy storage systems
Technical field
The present invention relates to electric and electronic technical field, more particularly to a kind of charge and discharge device and electrical energy storage systems.
Background technology
Electric energy storage device is visual plant indispensable among electrical engineering, it ensure system safe and stable operation, Improve the quality of power supply, the reliability for improving power supply etc. to play a very important role.Among prior art, to electric energy storage When device is charged, typically directly charged from power network power taking by converter plant and corresponding control device, with Reach the requirement to various application environments.And when discharging electric energy storage device, it is classified generally by ohmic load During electric discharge, or when being controlled electric discharge by PWM (Pulse Width Modulation, pulse width modulation), energy Utilization rate it is not high, so, how preferably to be solved to this problem, being that those skilled in the art are urgently to be resolved hurrily asks Topic.
The content of the invention
In view of this, it is an object of the invention to provide a kind of charge and discharge device and electrical energy storage systems, to reduce charge and discharge Electric installation is to inputting the capacity requirement of power network and improving the utilization rate of energy.Its concrete scheme is as follows:
A kind of charge and discharge device, including:
Commutation inversion module, energy-storage module, bidirectional DC/DC module, discharge resistance module;
Wherein, the output end of power network is connected with the first end of the commutation inversion module, and the of the commutation inversion module Two ends are connected with the first end of the energy-storage module, the second end of the energy-storage module and the first end of the bidirectional DC/DC module Connection, the second end of the bidirectional DC/DC module are connected with the first end of the discharge resistance module, the discharge resistance module The second end be connected with outside energy storage device.
Preferably, the nominal input voltage of the commutation inversion module be 380V three-phase alternating current, rated output voltage For 750V, output-current rating 50A, peak power output 37.5kw.
Preferably, the rated voltage of the bidirectional DC/DC module be 750V DC voltage, rated current 600A.
Preferably, the discharge resistance module includes:
Insulated gate bipolar transistor, resistance and contactor;
The colelctor electrode of the igbt is connected with the first end of the contactor, and the insulated gate bipolar is brilliant The emitter stage of body pipe is connected with the first end of the resistance;
Wherein, the second end of the colelctor electrode of the insulated gate bipolar transistor and the resistance collectively forms the electric discharge The first end of resistive module, the second end of the resistance and the second end of the contactor collectively form the discharge resistance module The second end.
Preferably, the maximum current of the discharge resistance module and maximum heat radiation power are respectively 100A and 2KW.
Preferably, the rated value of resistance of the resistance is 0.2 Ω.
Preferably, the energy-storage module is three accumulation power supply casees being connected in parallel;
Each accumulation power supply case includes 36 modules being connected in series, and the module includes the first electric capacity being connected in parallel Group and the second capacitance group, first capacitance group include 8 super capacitors being connected in series, and second capacitance group includes 2 The super capacitor being connected in parallel;
Wherein, the first end of each accumulation power supply case collectively forms the first end of the energy-storage module, each energy storage Second end of power supply box collectively forms the second end of the energy-storage module.
Preferably, the rated capacity of the super capacitor is 9500F.
Preferably, the rated voltage of the energy-storage module is 750V, maximum charging current 1800A, maximum discharge current For 1800A, rated capacity 198F.
Accordingly, the invention also discloses a kind of electrical energy storage systems, including foregoing disclosed charge and discharge device.
In the present invention, a kind of charge and discharge device, including:Commutation inversion module, energy-storage module, bidirectional DC/DC module, put Electric resistive module;Wherein, the output end of power network and the first end of commutation inversion module connect, the second end of commutation inversion module with The first end connection of energy-storage module, the second end of energy-storage module are connected with the first end of bidirectional DC/DC module, bidirectional DC/DC module The second end be connected with the first end of discharge resistance module, the second end of discharge resistance module is connected with outside energy storage device.
It can be seen that the charge and discharge device in the present invention, the capacity usage ratio in charge and discharge device is improved by energy-storage module, That is, when the voltage of energy-storage module is relatively low, energy-storage module can supplement electricity by inputting power network and commutation inversion module, when When the voltage of energy-storage module is higher, by commutation inversion module to power network feedback energy.So compared to prior art, this hair Bright charge and discharge device can maximumlly realize the utilization rate to power grid energy.Moreover, in the present invention, the energy of power network output Amount is by commutation inversion module first, is then charged again to energy-storage module, reduces charge and discharge device to inputting power network Capacity requirement, can be in the interval of equipment, to energy storage in the form of low current that is, by such design method Module is charged, and then reduces the capacity requirement to inputting power network.In summary, the charge and discharge Denso in the present invention is utilized Put, can not only reduce charge and discharge device to inputting the capacity requirement of power network, and also improve the utilization rate of energy.Accordingly , a kind of electrical energy storage systems provided by the invention equally have above-mentioned beneficial effect.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of structure chart of charge and discharge device provided in an embodiment of the present invention;
Fig. 2 is a kind of structure chart of discharge resistance module provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of charge and discharge device, as shown in figure 1, the charge and discharge device includes:
Commutation inversion module 101, energy-storage module 102, bidirectional DC/DC module 103, discharge resistance module 104;
Wherein, the output end of power network is connected with the first end of commutation inversion module 101, and the second of commutation inversion module 101 End is connected with the first end of energy-storage module 102, and the second end of energy-storage module 102 is connected with the first end of bidirectional DC/DC module 103, Second end of bidirectional DC/DC module 103 is connected with the first end of discharge resistance module 104, the second end of discharge resistance module 104 It is connected with outside energy storage device.
In the present embodiment, by commutation inversion module 101, energy-storage module 102, bidirectional DC/DC module 103 and discharge resistance Module 104 links together, first, when getting electricity from power network, by commutation inversion module 101 to energy-storage module 102 Charged, then outside energy-storage module is discharged by bidirectional DC/DC module 103.It should be noted that by two-way One uncontrolled input direct voltage can be for conversion into another in check output direct current by DCDC modules 103 Pressure, so, improve the stability of charge and discharge device in the present invention.
In the prior art, when being charged to the electric energy storage device of high-power Large Copacity, usually directly taken from power network Electricity, electric energy storage device is charged by converter plant and corresponding charging equipment, it is clear that if necessary to electric energy storage device Quick charge is carried out, the requirement to net capacity is larger, and in the present embodiment, power network is by commutation inversion module 101 to storage Can module 102 when being charged, enable to the charge and discharge device of the present invention, at one's leisure between also can to energy-storage module 102 with Less electric current is charged, so, by such design method, reduce the requirement to inputting net capacity, and then solve Among prior art of having determined, when being charged to the electric energy storage device of high-power Large Copacity, is required to net capacity the problem of high
On the other hand, it is usually logical when discharging the electric energy storage device of high-power Large Copacity among prior art Cross ohmic load and carry out classification electric discharge, or PWM control constant-current discharges, in the process, the heating power of resistance is larger, for dissipating The requirement of heat is very high, moreover, such a design method, the equipment volume designed is larger, and capacity usage ratio is not high.In this implementation In example, when external electrical energy storage device needs charging, energy-storage module 102 passes through bidirectional DC/DC module, and outside is stored up with high current Energy equipment is charged;When outside energy storage device needs electric discharge, by bidirectional DC/DC module 103, energy-storage module 102 is carried out Charging, when external electrical energy storage device voltage needs to be discharged to 0V, then constant-current discharge is carried out by discharge resistance module, by outside Electricity emptying in energy storage device, by such mode, can facilitate staff to be maintained maintenance, also ensure maintenance The personal safety of personnel.
It is understood that the circuit and electronics of the technique effect of charge and discharge device modules in the present invention can be reached Component is varied, can be super capacitor for example, for energy-storage module 102, can be battery or lithium electricity Other energy storage components such as pond.Herein, should be not construed as limiting herein for the purpose of it can reach practical application.Certainly, for each The design parameter of individual module in actual applications, herein also without limiting, all are for the purpose of reaching practical application.
It can be seen that the charge and discharge device in the present invention, the capacity usage ratio in charge and discharge device is improved by energy-storage module, That is, when the voltage of energy-storage module is relatively low, energy-storage module can supplement electricity by inputting power network and commutation inversion module, when When the voltage of energy-storage module is higher, by commutation inversion module to power network feedback energy.So compared to prior art, this hair Bright charge and discharge device can maximumlly realize the utilization rate to power grid energy.Moreover, in the present invention, the energy of power network output Amount is by commutation inversion module first, is then charged again to energy-storage module, reduces charge and discharge device to inputting power network Capacity requirement, can be in the interval of equipment, to energy storage in the form of low current that is, by such design method Module is charged, and then reduces the capacity requirement to inputting power network.In summary, the charge and discharge Denso in the present invention is utilized Put, can not only reduce charge and discharge device to inputting the capacity requirement of power network, and also improve the utilization rate of energy.
Based on above-described embodiment, the present embodiment has carried out specific limit to the parameter of the modules in a upper embodiment It is fixed.
Specifically, the nominal input voltage of commutation inversion module 101 is 380V three-phase alternating current, rated output voltage is 750V DC voltage, output-current rating 50A, peak power output 37.5kw.
Specifically, the rated voltage of energy-storage module is 750V, maximum charging current 1800A, maximum discharge current is 1800A, rated capacity 198F.
Specifically, the rated voltage of bidirectional DC/DC module 103 is 750V, rated current 600A.
In the present embodiment, energy-storage module 102 is three accumulation power supply casees being connected in parallel;
Each accumulation power supply case includes 36 modules being connected in series, module include the first capacitance group being connected in parallel and Second capacitance group, the first capacitance group include 8 super capacitors being connected in series, and the second capacitance group is connected in parallel super including 2 Level electric capacity;
Wherein, the first end of each accumulation power supply case collectively forms the first end of energy-storage module, each accumulation power supply Second end of case collectively forms the second end of energy-storage module.
Specifically, the rated capacity of super capacitor is 9500F.
It is understood that in the present embodiment, using super capacitor as energy-storage module in main energy-storage travelling wave tube, be Because super capacitor has the advantages that power density is big, energy storage efficiency is high, charge/discharge rates are fast.Single super-capacitor voltage compared with It is low, and the energy that can be stored also can be smaller, so, it is with above-mentioned company by single super capacitor in the present embodiment The mode of connecing has carried out connection in series-parallel, forms a super-capacitor module, namely energy-storage module 102.Certainly, for energy-storage module 102 Also other implementations, such as battery, lithium battery component, are not construed as limiting herein.
As a preferred embodiment, as shown in Fig. 2 discharge resistance module includes:Insulated gate bipolar transistor Q, resistance R and contactor KM;
Igbt Q colelctor electrode is connected with contactor KM first end, igbt Q hair Emitter-base bandgap grading is connected with resistance R first end;
Wherein, insulated gate bipolar transistor Q colelctor electrode and resistance R the second end collectively form discharge resistance module First end, resistance R the second end and contactor KM the second end collectively form the second end of discharge resistance module.
Specifically, the maximum current of discharge resistance module and maximum heat radiation power are respectively 100A and 2KW.
Specifically, the rated value of resistance of resistance is 0.2 Ω.
In the present embodiment, outside energy storage device is specifically described by taking vehicles energy accumulating power supply as an example, vehicles energy accumulating The parameters of power supply are respectively:Rated voltage is DC750V, maximum charging and discharging currents are 600A, rated capacity 66F.Work as electricity When net output 380V three-phase alternating current passes through commutation inversion module 101, it will export 50A constant current, pressure limiting 600V gives Energy-storage module 102 is charged.After energy-storage module 102 charges to 600V, commutation inversion module 101 can stop to energy-storage module 102 are charged.When outside energy storage device need charging when, then can by bidirectional DC/DC module 103 to outside energy storage device with 600A constant current and 750V voltage are charged, and after outside energy storage device is fully charged, the voltage of energy-storage module 102 is big Cause can drop to 400V.If outside energy-storage module needs electric discharge, outside energy storage mould can be made by bidirectional DC/DC module 103 Block is discharged with 600A constant current, brilliant by insulated gate bipolar when the tension discharge of outside energy-storage module is to 50V Body tube power switchs Q, and PWM controls are discharged with 100A constant current, until being discharged to 0V.
Specifically, in the present embodiment, the conversion efficiency of commutation inversion module 101 and bidirectional DC/DC module 103 is reachable More than 95%, moreover, under optimum, charge and discharge device can recycle to 85% energy, only exist one Divide the loss of conversion efficiency.Certainly, the energy-storage module 102 in the present embodiment can also be other storages such as battery, lithium battery Energy element, all are not construed as limiting herein for the purpose of it can reach practical application.
It should be noted that it is to give some specific parameters and data result, certainly in reality in the present embodiment Application among, component in modules and design all can be different, and the adjustment of corresponding parameter also can be different, all For the purpose of reaching practical application, do not repeat herein.
Accordingly, the invention also discloses a kind of electric energy-storage system, including foregoing disclosed charge and discharge device.
It is understood that a kind of electric energy-storage system disclosed by the invention, due to charge and discharge device disclosed above, So the capacity usage ratio of electric energy-storage system can be improved, the maximized requirement reduced to inputting power network.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning Covering including for nonexcludability, so that process, method, article or equipment including a series of elements not only include that A little key elements, but also the other element including being not expressly set out, or also include for this process, method, article or The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged Except other identical element in the process including the key element, method, article or equipment being also present.
A kind of charge and discharge device provided by the present invention and electrical energy storage systems are described in detail above, herein Apply specific case to be set forth the principle and embodiment of the present invention, the explanation of above example is only intended to help Understand the method and its core concept of the present invention;Meanwhile for those of ordinary skill in the art, according to the thought of the present invention, There will be changes in specific embodiments and applications, in summary, this specification content should not be construed as to this The limitation of invention.

Claims (10)

  1. A kind of 1. charge and discharge device, it is characterised in that including:
    Commutation inversion module, energy-storage module, bidirectional DC/DC module, discharge resistance module;
    Wherein, the output end of power network is connected with the first end of the commutation inversion module, the second end of the commutation inversion module It is connected with the first end of the energy-storage module, the second end of the energy-storage module and the first end of the bidirectional DC/DC module connect Connect, the second end of the bidirectional DC/DC module is connected with the first end of the discharge resistance module, the discharge resistance module Second end is connected with outside energy storage device.
  2. 2. device according to claim 1, it is characterised in that the nominal input voltage of the commutation inversion module is 380V Three-phase alternating current, rated output voltage is 750V DC voltage, and output-current rating 50A, peak power output is 37.5kw。
  3. 3. device according to claim 1, it is characterised in that the rated voltage of the bidirectional DC/DC module is 750V, volume It is 600A to determine electric current.
  4. 4. device according to claim 1, it is characterised in that the discharge resistance module includes:
    Insulated gate bipolar transistor, resistance and contactor;
    The colelctor electrode of the igbt is connected with the first end of the contactor, the igbt Emitter stage be connected with the first end of the resistance;
    Wherein, the second end of the colelctor electrode of the insulated gate bipolar transistor and the resistance collectively forms the discharge resistance The first end of module, the second end of the resistance and the second end of the contactor collectively form the of the discharge resistance module Two ends.
  5. 5. device according to claim 4, it is characterised in that the maximum current of the discharge resistance module and maximum radiating Power is respectively 100A and 2KW.
  6. 6. device according to claim 4, it is characterised in that the rated value of resistance of the resistance is 0.2 Ω.
  7. 7. according to the device described in any one of claim 1 to 6, it is characterised in that the energy-storage module is three and is connected in parallel Accumulation power supply case;
    Each accumulation power supply case includes 36 modules being connected in series, the module include the first capacitance group being connected in parallel and Second capacitance group, first capacitance group include 8 super capacitors being connected in series, and second capacitance group includes 2 parallel connections The super capacitor of connection;
    Wherein, the first end of each accumulation power supply case collectively forms the first end of the energy-storage module, each accumulation power supply Second end of case collectively forms the second end of the energy-storage module.
  8. 8. device according to claim 7, it is characterised in that the rated capacity of the super capacitor is 9500F.
  9. 9. device according to claim 7, it is characterised in that the rated voltage of the energy-storage module is 750V, and maximum is filled Electric current is 1800A, maximum discharge current 1800A, rated capacity 198F.
  10. 10. a kind of electrical energy storage systems, it is characterised in that including the charge and discharge device as described in any one of claim 1 to 9.
CN201711129566.4A 2017-11-15 2017-11-15 A kind of charge and discharge device and electrical energy storage systems Pending CN107706998A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711129566.4A CN107706998A (en) 2017-11-15 2017-11-15 A kind of charge and discharge device and electrical energy storage systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711129566.4A CN107706998A (en) 2017-11-15 2017-11-15 A kind of charge and discharge device and electrical energy storage systems

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Publication Number Publication Date
CN107706998A true CN107706998A (en) 2018-02-16

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005010972A (en) * 2003-06-18 2005-01-13 Yaskawa Electric Corp Electronic device equipped with data back up function
CN102244391A (en) * 2011-07-12 2011-11-16 华北电力大学 Energy storage grid-connected circuit based on lithium batteries and super capacitor and control method thereof
CN205509516U (en) * 2015-12-03 2016-08-24 北京科林普尔电气科技有限公司 Electronic workover rig in oil field is with two -way energy storage converter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005010972A (en) * 2003-06-18 2005-01-13 Yaskawa Electric Corp Electronic device equipped with data back up function
CN102244391A (en) * 2011-07-12 2011-11-16 华北电力大学 Energy storage grid-connected circuit based on lithium batteries and super capacitor and control method thereof
CN205509516U (en) * 2015-12-03 2016-08-24 北京科林普尔电气科技有限公司 Electronic workover rig in oil field is with two -way energy storage converter

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