CN206077250U - Energy accumulation current converter - Google Patents
Energy accumulation current converter Download PDFInfo
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- CN206077250U CN206077250U CN201621117907.7U CN201621117907U CN206077250U CN 206077250 U CN206077250 U CN 206077250U CN 201621117907 U CN201621117907 U CN 201621117907U CN 206077250 U CN206077250 U CN 206077250U
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Abstract
This utility model provides a kind of energy accumulation current converter, and which is connected between battery modules and electrical network；The energy accumulation current converter includes the power cabinet being connected with the battery modules；When the battery modules are discharged, the DC voltage inversion that the battery modules are exported by the power cabinet is that alternating voltage is input into the electrical network；When the battery modules charge, the alternating current that the electrical network is exported is converted to DC voltage and is supplied to the battery modules by the power cabinet；The power cabinet includes three-phase line；Include at least two power cells being serially connected on every phase line；The power cell is for being alternating voltage by DC voltage inversion or alternating voltage is converted to DC voltage.The energy accumulation current converter that this utility model is provided need not access booster transformer and can access electrical network, and then can improve the energy conversion efficiency of the energy accumulation current converter, and floor space is less.
Description
【Technical field】
This utility model is related to technical field of electricity, more particularly to a kind of energy accumulation current converter.
【Background technology】
Energy accumulation current converter (Power Control System, PCS), for controlling the charging and discharging process of accumulator, enters
The conversion of row alternating current-direct current, directly can power for AC load under without grid condition.PCS is by DC/AC two way convertors, control
Unit etc. is constituted.PCS controllers receive Background control instruction by communicating, and control unsteady flow according to the symbol and size of power instruction
Device is charged to battery or discharges, and realizes the regulation to network re-active power and reactive power.
The alternating voltage of current energy accumulation current converter output is generally 315V, 380V or 660V etc., and electric pressure exists
The alternating voltage of output is if desired linked into the higher electrical network of voltage, such as 3.3kV, 10kV or 35kV etc. by below 1kV,
Then have to by accessing booster transformer realize.However, after booster transformer is accessed, access electric current can be caused larger, electricity
The problems such as floor space of the energy excessive and equipment of loss increases.
Additionally, existing Technology Energy conversion efficiency is low, and the power of single device is less, can only lean on to increase power
The parallel connection of multiple devices is realizing.However, when multiple devices are used in parallel, in the case of off-grid, because the output of multiple voltage sources,
The poor stable operation for being difficult to support micro-capacitance sensor of voltage concordance, easily because the impact for loading causes micro-capacitance sensor to collapse；Grid-connected
In the case of, it is difficult to reach completely the same impact that also can be certain to bulk power grid generation because multiple devices exchange output.
In consideration of it, real be necessary that offer one kind need not access booster transformer and can be directly accessed electrical network and energy conversion efficiency
High energy accumulation current converter.
【Utility model content】
The purpose of this utility model is to provide a kind of energy accumulation current converter, and the energy accumulation current converter need not access booster transformer i.e.
Accessible electrical network, and then the energy conversion efficiency of the energy accumulation current converter can be improved, and floor space is less.
To achieve these goals, this utility model provides a kind of energy accumulation current converter, and which is connected to battery modules and electrical network
Between；The energy accumulation current converter includes the power cabinet being connected with the battery modules；When the battery modules are discharged, the work(
The DC voltage inversion that the battery modules are exported by rate cabinet is that alternating voltage is input into the electrical network；When the battery modules charge
When, the alternating current that the electrical network is exported is converted to DC voltage and is supplied to the battery modules by the power cabinet；The power
Cabinet includes three-phase line；Include at least two power cells being serially connected on every phase line；The power cell is used for
It is alternating voltage by DC voltage inversion or alternating voltage is converted to into DC voltage.
In a preferred embodiment, the power cabinet also includes three Hall elements；Three hall sensings
Device respectively with the power unit cascade in it is described per in phase line sensing the current status of place circuit.
In a preferred embodiment, the energy accumulation current converter also includes and the power cabinet associated control unit；Institute
Control unit is stated for controlling the phase place of the power cabinet, so that the phase place phase of the power cell connected in every phase line
Together, and not the phase place between homophase is consistent with the phase place of the electrical network.
In a preferred embodiment, the power cell includes the first audion, the second audion, the three or three pole
Pipe, the 4th audion, the first diode, the second diode, the 3rd diode and the 4th diode；First audion
Colelctor electrode is connected with the positive pole of the battery modules；The emitter stage of first audion and the second transistor collector phase
Even；The emitter stage of second audion is connected with the negative pole of the battery modules；The colelctor electrode of the 3rd audion and institute
The positive pole for stating battery modules is connected；The emitter stage of the 3rd audion is connected with the 4th transistor collector；Described
The emitter stage of four audions is connected with the negative pole of the battery modules；The positive pole of first diode and first audion
Emitter stage be connected；The negative pole of first diode is connected with the colelctor electrode of first audion；Second diode
Positive pole be connected with the emitter stage of second audion；The current collection of the negative pole of second diode and second audion
Extremely it is connected；The positive pole of the 3rd diode is connected with the emitter stage of the 3rd audion；The negative pole of the 3rd diode
It is connected with the colelctor electrode of the 3rd audion；The positive pole of the 4th diode and the emitter stage phase of the 4th audion
Even；The negative pole of the 4th diode is connected with the colelctor electrode of the 4th audion.
In a preferred embodiment, the emitter stage of first audion and the colelctor electrode of second audion
Draw the first terminal in junction；Draw the junction of the emitter stage of the 3rd audion and the colelctor electrode of the 4th audion
Second terminal；The first terminal of one power cell is connected with the Second terminal of the adjacent power cell can be real
The series connection of existing two power cells.
In a preferred embodiment, it is described to include six power cells being serially connected per phase line；When the electricity
When pond module discharges, the voltage between the first terminal and the Second terminal of each power cell is 550V；Institute
State the alternating voltage that power cabinet exports 3.3kV.
The current transformer that this utility model is provided, as the power cabinet includes the power cell of multiple series connection, the battery
The DC voltage of module output directly can be hung on the electrical network after the power cabinet, need not access booster transformer, because
This, improves the energy conversion efficiency of the energy accumulation current converter, and floor space is less.
【Description of the drawings】
The functional block diagram of the energy accumulation current converter that Fig. 1 is provided for this utility model.
Fig. 2 is the circuit theory diagrams of power cabinet in Fig. 1.
【Specific embodiment】
In order that the purpose of this utility model, technical scheme and Advantageous Effects become apparent from understanding, below in conjunction with attached
Figure and specific embodiment, are further elaborated to this utility model.It should be appreciated that described in this specification
Specific embodiment is not intended to limit this utility model just for the sake of explaining this utility model.
Fig. 1 is referred to, the functional block diagram of its energy accumulation current converter 100 provided for this utility model.Energy accumulation current converter 100
It is connected between battery modules 200 and electrical network 300, for controlling the charging and discharging of battery modules 200, and carries out alternating current-direct current
Conversion, directly can power for AC load (not shown) in the case of without electrical network 300.Specifically, the energy accumulation current converter
100 for by the unidirectional current that battery modules 200 are exported be converted to alternating current and boost after access in the electrical network 300.Additionally, storage
Energy current transformer 100 is additionally operable to the alternating current that electrical network 300 is exported is converted to unidirectional current and battery modules 200 is supplied to as electricity
Pond module 200 charges.In the present embodiment, the battery modules 200 are ferric phosphate lithium cell.Further, the battery
Module 200 includes 54 groups of ferric phosphate lithium cells, and is respectively connected to the energy accumulation current converter 100 for a unit per 3 groups.Can manage
Xie Di, in other embodiments, the quantity of the battery included by the battery modules 200 can be according to the energy storage inverter
100 output and adjust.
Additionally, in the present embodiment, the electrical network 300 is 3.3kV buses.It is appreciated that in other embodiments,
The electrical network 300 can be other high voltage bus, for example, 10kV buses or 35kV buses etc..
The energy accumulation current converter 100 include the power cabinet 10 being connected with the battery modules 200 and with the power cabinet
10 associated control units 20.When battery modules 200 are discharged, the direct current that the battery modules 200 are exported by the power cabinet 10
Voltage inversion is that alternating voltage is input into the electrical network 300；When the battery modules 200 charge, the power cabinet 10 will be described
The alternating current of the output of electrical network 300 is converted to DC voltage and is input into the battery modules 200 and fills as the battery modules 200
Electricity.Specifically, the power cabinet 10 is included some power cells 11 being connected with the battery modules 200 and is series at described
Three Hall elements 12 in some power cells 11.In the present embodiment, the power cell 11 is for by unidirectional current
Pressure inversion is alternating voltage or alternating voltage is converted to DC voltage.The power cabinet includes 18 power cells 11,
It is located in being A, B, C three-phase line respectively, therefore, include six power being serially connected in the A phases, B phases and C phases respectively
Unit 11.Describe for convenience and distinguish, in the present embodiment, six power cells 11 in A phases are named as successively
A1～A6；In the same manner, six power cells 11 in B phases are named as into B1～B6 successively；By six power cells 11 in C phases according to
It is secondary to be named as C1～C6.Further, in the present embodiment, each power cell 11 exports the alternating voltage of 550V, therefore,
After the series connection of six power cells 11, the power cabinet 10 can export the alternating voltage of 3.3kV to electrical network 300.Can be with
Understand ground, in other embodiments, the number of the power cell 11 in every phase line can be entered according to the power being actually needed
Row adjustment, therefore, the serial number of (A phases, the B phases and C phases) power cell 11 on road of singly being got lines crossed by adjustment, you can increase or
The power of energy storage inverter 100 is reduced, and then avoids the discordance of multiple equipment parallel connection and caused multiple power supply outputs
Problem, so as to reduce when the battery modules 200 are discharged to the electrical network 300 or the impact of load, can also better conform to institute
State the impact of the fluctuation and load of electrical network to energy accumulation current converter.
Three Hall elements 12 are series at respectively in the circuit of the A phases, B phases and C phases, for sensing each
Current conditions in circuit.In the present embodiment, described each Hall element 12 is series at 6 power cells respectively
In the middle of 11.It is to be appreciated that in other embodiments, the Hall element 12 can be series at the A phases, B phases and C
Optional position in the circuit of phase.
Control unit 20 is used to control the phase place of the power cabinet 10, makes the phase place phase of power cell 11 being often in series
Together, and not the phase place between homophase meets 300 standard of electrical network, and then consistent with the phase place of electrical network 300 when causing grid-connected.In this reality
Apply in mode, the phase contrast between every phase is 120 degree.Additionally, described control unit 20 is made up of entity circuit and is connect by CAN
Mouth is communicated with BMS to obtain the status information of the battery modules 200, and then is capable of achieving to 200 protectiveness of the battery modules
Discharge and recharge run safety to guarantee battery modules 200.
Referring again to Fig. 2, which is the physical circuit schematic diagram of each power cell 11.Power cell 11 includes the one or three pole
Pipe Q1, the second audion Q2, the 3rd audion Q3, the 4th audion Q4, the first diode D1, the second diode D2, the three or two
Pole pipe D3 and the 4th diode D4.Specifically, the positive pole of the colelctor electrode of the first audion Q1 and the battery modules 200
It is connected；The emitter stage of the first audion Q1 is connected with the second audion Q2 colelctor electrodes；The second audion Q2's
Emitter stage is connected with the negative pole of the battery modules 200.The colelctor electrode and the battery modules 200 of the 3rd audion Q3
Positive pole is connected；The emitter stage of the 3rd audion Q3 is connected with the 4th audion Q4 colelctor electrodes；4th audion
The emitter stage of Q4 is connected with the negative pole of the battery modules 200.The positive pole of the first diode D1 and first audion
The emitter stage of Q1 is connected；The negative pole of the first diode D1 is connected with the colelctor electrode of the first audion Q1.Described second
The positive pole of diode D2 is connected with the emitter stage of the second audion Q2；The negative pole of the second diode D2 and described second
The colelctor electrode of audion Q2 is connected.The positive pole of the 3rd diode D3 is connected with the emitter stage of the 3rd audion Q3；Institute
The negative pole for stating the 3rd diode D3 is connected with the colelctor electrode of the 3rd audion Q3.The positive pole of the 4th diode D4 and institute
The emitter stage for stating the 4th audion Q4 is connected；The negative pole of the 4th diode D4 and the colelctor electrode phase of the 4th audion Q4
Even.Further, the junction of the emitter stage of the first audion Q1 and the colelctor electrode of the second audion Q2 draws the
One terminal 111；Draw second in the junction of the emitter stage of the 3rd audion Q3 and the colelctor electrode of the 4th audion Q4
Terminal 112.In the present embodiment, the voltage between the first terminal 111 and the Second terminal 112 is 550V alternating currents
Pressure.When two power cells 11 are connected, by the first terminal 111 of previous power cell 11 and next power cell 11
Second terminal 112 is connected.In the present embodiment, the first audion Q1～the 4th audion Q4 is NPN type three
Pole pipe.It is to be appreciated that the base stage of the first audion Q1～the 4th audion Q4 can connect high level or low level,
And then it is described to control by controlling the low and high level state of the base stage of the first audion Q1～the 4th audion Q4
The conducting of the first audion Q1～the 4th audion Q4 and cut-off such that it is able to which the battery modules 200 are exported by realization
DC inverter into alternating current.
The energy accumulation current converter 100 that this utility model is provided, as the power cabinet 10 includes the power cell of multiple series connection
11, the DC voltage of the output of the battery modules 200 need not be connect by directly hanging on high-voltage fence 300 after power cabinet 10
Enter booster transformer, and then improve the energy conversion efficiency of energy accumulation current converter 100, and floor space is less.
This utility model is not restricted to described in description and embodiment, therefore for the personnel of familiar field
For be easily achieved additional advantage and modification, therefore in the general concept limited without departing substantially from claim and equivalency range
Spirit and scope in the case of, this utility model be not limited to specific details, representational equipment and shown here as with retouch
The examples shown stated.
Claims (6)
1. a kind of energy accumulation current converter, which is connected between battery modules and electrical network；It is characterized in that：The energy accumulation current converter includes
The power cabinet being connected with the battery modules；When the battery modules are discharged, the battery modules are exported by the power cabinet
DC voltage inversion be that alternating voltage is input into the electrical network；When the battery modules charge, the power cabinet is by the electricity
The alternating current of net output is converted to DC voltage and is supplied to the battery modules；The power cabinet includes three-phase line；It is described every
Include at least two power cells being serially connected on phase line；The power cell for by DC voltage inversion be alternating current
Alternating voltage is converted to DC voltage by pressure.
2. energy accumulation current converter as claimed in claim 1, it is characterised in that：The power cabinet also includes three Hall elements；
Three Hall elements respectively with the power unit cascade in it is described per in phase line sensing the electric current of place circuit
State.
3. energy accumulation current converter as claimed in claim 2, it is characterised in that：The energy accumulation current converter also includes and the power cabinet
Associated control unit；Described control unit is used for the phase place for controlling the power cabinet, so that the work(connected in every phase line
The phase place of rate unit is identical, and the phase place between homophase is not consistent with the phase place of the electrical network.
4. energy accumulation current converter as claimed in claim 3, it is characterised in that：The power cell include the first audion, second
Audion, the 3rd audion, the 4th audion, the first diode, the second diode, the 3rd diode and the 4th diode；
The colelctor electrode of first audion is connected with the positive pole of the battery modules；The emitter stage of first audion and described
Two transistor collectors are connected；The emitter stage of second audion is connected with the negative pole of the battery modules；Described 3rd 3
The colelctor electrode of pole pipe is connected with the positive pole of the battery modules；The emitter stage of the 3rd audion and the 4th audion collection
Electrode is connected；The emitter stage of the 4th audion is connected with the negative pole of the battery modules；The positive pole of first diode
It is connected with the emitter stage of first audion；The colelctor electrode phase of the negative pole of first diode and first audion
Even；The positive pole of second diode is connected with the emitter stage of second audion；The negative pole of second diode and institute
The colelctor electrode for stating the second audion is connected；The positive pole of the 3rd diode is connected with the emitter stage of the 3rd audion；Institute
The negative pole for stating the 3rd diode is connected with the colelctor electrode of the 3rd audion；The positive pole and the described 4th of the 4th diode
The emitter stage of audion is connected；The negative pole of the 4th diode is connected with the colelctor electrode of the 4th audion.
5. energy accumulation current converter as claimed in claim 4, it is characterised in that：The emitter stage of first audion and described second
Draw the first terminal in the junction of the colelctor electrode of audion；The emitter stage of the 3rd audion and the collection of the 4th audion
Draw Second terminal in the junction of electrode；By the first terminal of a power cell and the of the adjacent power cell
Two-terminal is connected and is capable of achieving the series connection of two power cells.
6. energy accumulation current converter as claimed in claim 5, it is characterised in that：It is described to include six work(being serially connected per phase line
Rate unit；When the battery modules are discharged, between the first terminal and the Second terminal of each power cell
Voltage be 550V；The power cabinet exports the alternating voltage of 3.3kV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621117907.7U CN206077250U (en) | 2016-10-12 | 2016-10-12 | Energy accumulation current converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621117907.7U CN206077250U (en) | 2016-10-12 | 2016-10-12 | Energy accumulation current converter |
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| Publication Number | Publication Date |
|---|---|
| CN206077250U true CN206077250U (en) | 2017-04-05 |
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ID=58442284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621117907.7U Active CN206077250U (en) | 2016-10-12 | 2016-10-12 | Energy accumulation current converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181183A (en) * | 2020-01-18 | 2020-05-19 | 中国人民解放军海军潜艇学院 | Ship shore power system and control method |
| WO2020107948A1 (en) * | 2018-11-27 | 2020-06-04 | 珠海格力电器股份有限公司 | Current converter and energy storage system |
-
2016
- 2016-10-12 CN CN201621117907.7U patent/CN206077250U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020107948A1 (en) * | 2018-11-27 | 2020-06-04 | 珠海格力电器股份有限公司 | Current converter and energy storage system |
| CN111181183A (en) * | 2020-01-18 | 2020-05-19 | 中国人民解放军海军潜艇学院 | Ship shore power system and control method |
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