CN202134923U - Deep charging and discharging type battery energy storage paralleling device - Google Patents

Deep charging and discharging type battery energy storage paralleling device Download PDF

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Publication number
CN202134923U
CN202134923U CN201120226218U CN201120226218U CN202134923U CN 202134923 U CN202134923 U CN 202134923U CN 201120226218 U CN201120226218 U CN 201120226218U CN 201120226218 U CN201120226218 U CN 201120226218U CN 202134923 U CN202134923 U CN 202134923U
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China
Prior art keywords
current transforming
depth
module
degree
accumulation
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Expired - Lifetime
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CN201120226218U
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Chinese (zh)
Inventor
张文武
唐功友
高德欣
刘淑格
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Shenzhen city and Wei Wei power Polytron Technologies Inc
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张文武
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Abstract

The utility model discloses a deep charging and discharging type battery energy storage paralleling device, comprising a control module and a plurality of parallelly connected current transforming modules, wherein one end of the parallelly connected current transforming modules is connected with an ac input terminal, the other end of the parallelly connected current transforming modules is connected with an external energy storage module, the control module detects voltage of the energy storage module, ac input current, dc bus voltage and dc bus current by real time and sends control instructions used for controlling conduction states to the parallelly connected current transforming modules, and each current transforming module comprises an AC/DC current transforming unit and a DC/DC current transforming unit serially connected with the AC/DC current transforming unit, thereby realizing that the AC side power supply voltage is fixed inputted and DC output voltage of the DC side connected with the external energy storage module is adjustable. The device realizes the purpose of deep charging and discharging, is high in reliability, convenient in usage, and can avoid waste of new energy power generating as an environmental friendly product.

Description

The degree of depth discharges and recharges type battery accumulation of energy grid-connecting apparatus
Technical field
The utility model relates to a kind of battery accumulation of energy grid-connecting apparatus, specifically, relates to a kind of degree of depth and discharges and recharges type battery accumulation of energy grid-connecting apparatus.
Background technology
At present the most of electrical network of China is supplied power to the end user through existing transmission and distribution networks generally all based on large-scale centralized formula power station, this traditional mode electric power of can providing and delivering safely and reliably; But along with the increase of renewable energy power generation ratio demand, the essence of electrical network is also taking place to change, therefore; The problem that is now faced is that along with the energy ratio that wind energy turbine set and photovoltaic generation factory are provided is growing, these wind energy turbine set and photovoltaic generation factory are generally all away from the population collection district; And the power supply target is mainly the city electricity consumption and commercial power is supplied power, and therefore, can obtain electric power from various forms of power plants in order to ensure this novel power grid; At present; The subject matter that generation of electricity by new energy faced is that electricity collection is incomplete, is wasted greatly, can not be to the energy storage equipment deep charge; In addition, the problem that energy storage equipment can't deep discharge also can have influence on the accumulation of energy utilance that is incorporated into the power networks.
Thereby invent a kind of degree of depth and discharge and recharge the problem that type battery energy storage grid-connecting apparatus then becomes the utility model and faced.It can be stored honourable electric energy, in microgrid, can play emergent independent reversion reaction.
Based on this, how to invent a kind of accumulation of energy grid-connecting apparatus, can the degree of depth discharge and recharge, improve the utilance that is incorporated into the power networks, be the problem that the utility model mainly solves.
Summary of the invention
The utility model provides a kind of wind-powered electricity generation battery accumulation of energy grid-connecting apparatus to existing accumulation of energy grid-connecting apparatus, can store electric energy more than needed very easily, and energy storage device can the degree of depth discharge and recharge the reliability height.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme to be achieved:
A kind of degree of depth discharges and recharges type battery accumulation of energy grid-connecting apparatus; Comprise control module and be respectively applied for N the parallelly connected unsteady flow module that is connected outside accumulation of energy module; Said N the other end of parallelly connected unsteady flow module connects the alternating current input terminal respectively; Control module detect in real time the accumulation of energy module voltage, unsteady flow module input output voltage (such as exchanging input current, dc bus voltage, dc bus current etc.), send the unsteady flow module that is used to control the control command of conducting state to described N parallel connection, to select the quantity of while concurrent working in N the parallelly connected module; Wherein, N is a positive integer.
Further, described each unsteady flow module comprises AC-DC current transforming unit and DC-DC current transforming unit, and said AC-DC current transforming unit is in series through its dc terminal and DC-DC current transforming unit.
Further again, the dc terminal of described N AC-DC current transforming unit is in parallel.
Preferably, described DC-DC current transforming unit comprises the two-way high-power converter of IGBT type.
Preferably, described AC-DC current transforming unit comprises the voltage type PWM pulse rectifier.
Further again, described control module is a degree of depth charging-discharging controller.
In order to said degree of depth charging-discharging controller stable operating voltage to be provided, this degree of depth discharges and recharges type battery energy storage equipment and also comprises ups power.
Further, described accumulation of energy module is battery pack, and wherein, described battery pack can be wherein a kind of such as fuel cell, flow battery.
Compared with prior art, the advantage and the good effect of the utility model are: the degree of depth of the utility model discharges and recharges type battery accumulation of energy grid-connecting apparatus and is divided into two grades through discharging and recharging according to magnitude of voltage, and correspondingly adopts two charge and discharge devices to discharge and recharge respectively; Reached the purpose that the degree of depth discharges and recharges; Reliability is high, and is easy to use, and can store electric energy more than needed very easily; Avoided the waste of some generations of electricity by new energy, green, environmental protection.
After the detailed description in conjunction with advantages the utility model execution mode, other characteristics of the utility model and advantage will become clearer.
Description of drawings
Fig. 1 is a kind of embodiment circuit structure block diagram that the degree of depth that the utility model proposes discharges and recharges type battery accumulation of energy grid-connecting apparatus;
Fig. 2 is the part flow chart that the degree of depth that the utility model proposes discharges and recharges a kind of embodiment of type battery accumulation of energy grid-connecting apparatus.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done explanation in further detail.
Embodiment one, and referring to shown in Figure 1, the degree of depth of present embodiment discharges and recharges type battery accumulation of energy grid-connecting apparatus; Comprise control module P1, a N unsteady flow module P3 that is in parallel; Said unsteady flow module P3 one end connects the alternating current input terminal, and an other end connects outside accumulation of energy module P4, and said N unsteady flow module P3 is in parallel; Wherein, N is a positive integer.Control module P1 detects the voltage of accumulation of energy module P4 in real time; Through the size of this magnitude of voltage and preset threshold value (such as being made as 270V) relatively, generate and be used to control the control command of conducting state and be sent to described current conversion module P3, for example; The magnitude of voltage that detects accumulation of energy module P4 as control module P1 is during less than threshold value; The conducting state (selecting AC-DC or DC-AC etc. such as control) of sending controling instruction control unsteady flow module P3 at this moment, converts direct current into scope adjustable direct current by described unsteady flow module P3; And be delivered to accumulation of energy module P4 storage (charging process); Perhaps unsteady flow module P3 converts the direct current that accumulation of energy module P4 is stored to alternating current, and feeds back to (discharge process) in the electrical network, for the ease of management; Present embodiment also comprises battery set management module P2, is used for unified management accumulation of energy module P4 etc.
Because generally speaking, the conventional battery group will realize the two-way flow of electric energy, and the requirement that must reach line voltage is 270-390V, could realize under the effect of controller that then accumulation of energy is incorporated into the power networks, if brownout then can't realize this function.Unsteady flow module P3 is used for the current conversion between high voltage region; Described unsteady flow module P3 comprises AC-DC current transforming unit P3-1 and DC-DC current transforming unit P3-2; Said AC-DC current transforming unit P3-1 is in series through its dc terminal and DC-DC current transforming unit P3-2; And the dc terminal of described N AC-DC current transforming unit is in parallel, and therefore, can select AC-DC current transforming unit and DC-DC current transforming unit according to actual needs.Wherein, AC-DC current transforming unit P3-1, main circuit preferably adopts the voltage type PWM pulse rectifier, and described DC-DC current transforming unit P3-2 comprises the two-way high-power converter of IGBT type.
Introduce the process that control module P1 controls described unsteady flow module P3 work below in detail; As shown in Figure 2; With the threshold value is that 270V is an example; The magnitude of voltage that detects accumulation of energy module P4 as control module P1 is during less than 270V; Control module P1 sending controling instruction control P3-1 conducting; The alternating current of outside is reverse into the direct current of effective value of alternating current * * 1.1 sizes; The DC-DC transducer of controlling P3-2 simultaneously becomes the direct current of battery required voltage with it, and is delivered to accumulation of energy module P4 storage (charging process), perhaps in discharge process; When the voltage among the accumulation of energy module P4 during, feed back in the electrical network after converting high-tension direct current into alternating current by the unsteady flow module greater than 270V.When control module P1 detects accumulation of energy module P4 magnitude of voltage greater than 270V, then control P3-1 and P3-2 conducting, under the state of discharge; The direct voltage of accumulation of energy module P4 output; Boost to the high-voltage dc voltage of directly inversion feedback net through DC-DC, and after this high-voltage dc voltage passes through the AC-DC inversion, convert High Level AC Voltage into and feed back in the electrical network; Wherein, described control module P1 is a degree of depth charging-discharging controller.
In order to said degree of depth charging-discharging controller stable operating voltage to be provided, this degree of depth discharges and recharges type battery energy storage equipment and also comprises ups power.Described accumulation of energy module P4 is a battery pack, and wherein, described battery pack can be wherein a kind of of fuel cell, flow battery.
As shown in Figure 1, this grid-connecting apparatus can modularization, much organizes P3 unsteady flow module through parallel connection, thereby can charge to a plurality of battery pack, and stable performance is easy to realize.
The degree of depth of present embodiment discharges and recharges type battery accumulation of energy grid-connecting apparatus and discharges and recharges through AC-DC and two charge and discharge devices of DC-DC; Reached the purpose that the degree of depth discharges and recharges; Reliability is high, and is easy to use, and can store electric energy more than needed very easily; Avoided the waste of some generations of electricity by new energy, green, environmental protection.The advantage that this device has that volume is little, in light weight, modularization is formed has reduced and has installed required installing space, and device can modularization, the hot plug design; Be easy to install; Adopt the multimode paralleling model, the automatic detachment system of separate unit fault, safer, reliable.
Certainly; Above-mentioned explanation is not to be the restriction to the utility model; The utility model also be not limited in above-mentioned for example, variation, remodeling, interpolation or replacement that those skilled in the art are made in the essential scope of the utility model also should belong to the protection range of the utility model.

Claims (7)

1. a degree of depth discharges and recharges type battery accumulation of energy grid-connecting apparatus; It is characterized in that: comprise control module and the unsteady flow module that is respectively applied for N the parallel connection that is connected outside accumulation of energy module; An other end of said N parallelly connected unsteady flow module connects the alternating current input terminal respectively, control module detect in real time the accumulation of energy module voltage, unsteady flow module input output voltage, send the control command that is used to control conducting state to described N parallelly connected unsteady flow module; Wherein, N is a positive integer.
2. the degree of depth according to claim 1 discharges and recharges type battery accumulation of energy grid-connecting apparatus; It is characterized in that: described unsteady flow module comprises AC-DC current transforming unit and DC-DC current transforming unit, and said AC-DC current transforming unit is in series through its dc terminal and DC-DC current transforming unit.
3. the degree of depth according to claim 2 discharges and recharges type battery accumulation of energy grid-connecting apparatus, it is characterized in that: the dc terminal of described N AC-DC current transforming unit is in parallel.
4. the degree of depth according to claim 3 discharges and recharges type battery accumulation of energy grid-connecting apparatus, it is characterized in that: described DC-DC current transforming unit comprises the two-way high-power converter of IGBT type.
5. the degree of depth according to claim 4 discharges and recharges type battery accumulation of energy grid-connecting apparatus, it is characterized in that: described AC-DC current transforming unit comprises the voltage type PWM pulse rectifier.
6. discharge and recharge type battery accumulation of energy grid-connecting apparatus according to the described degree of depth of each claim of claim 1-5, it is characterized in that: described control module is a degree of depth charging-discharging controller.
7. the degree of depth according to claim 6 discharges and recharges type battery accumulation of energy grid-connecting apparatus, it is characterized in that: also be included as the ups power that said degree of depth charging-discharging controller provides operating voltage.
CN201120226218U 2011-06-30 2011-06-30 Deep charging and discharging type battery energy storage paralleling device Expired - Lifetime CN202134923U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624047A (en) * 2012-02-23 2012-08-01 国彪电源集团有限公司 Emergency power supply of combined charge and discharged type medium-voltage system
CN104852444A (en) * 2015-05-05 2015-08-19 深圳晶福源科技股份有限公司 DC charging device for electric automobiles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624047A (en) * 2012-02-23 2012-08-01 国彪电源集团有限公司 Emergency power supply of combined charge and discharged type medium-voltage system
CN104852444A (en) * 2015-05-05 2015-08-19 深圳晶福源科技股份有限公司 DC charging device for electric automobiles

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Effective date of registration: 20151013

Address after: 266000 Qingdao hi tech Industrial Development Zone, Qingdao National University Science Park, Shandong

Patentee after: Qingdao Pike Energy Co.,Ltd.

Address before: Chongqing Sifang District Shandong road 266200 Qingdao City No. 298 Yanshan century business building room 1503

Patentee before: Zhang Wenwu

C41 Transfer of patent application or patent right or utility model
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Effective date of registration: 20160509

Address after: 518049 Guangdong city of Shenzhen province Futian District Camry Factory 1, the entire 318

Patentee after: AUTOWAY, GUANGDONG ELECTRIC POWER CONSTRUCTION CO., LTD.

Address before: 266000 Qingdao hi tech Industrial Development Zone, Qingdao National University Science Park, Shandong

Patentee before: Qingdao Pike Energy Co.,Ltd.

C41 Transfer of patent application or patent right or utility model
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Address after: Longgang street community of Longgang District of Shenzhen City Tongde Guangdong province 518049 pit road No. 64 building two

Patentee after: Shenzhen city and Wei Wei power Polytron Technologies Inc

Address before: 518049 Guangdong city of Shenzhen province Futian District Camry Factory 1, the entire 318

Patentee before: AUTOWAY, GUANGDONG ELECTRIC POWER CONSTRUCTION CO., LTD.

C56 Change in the name or address of the patentee
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Granted publication date: 20120201

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