CN109088462A - A kind of active equalization of battery device containing AC module - Google Patents
A kind of active equalization of battery device containing AC module Download PDFInfo
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- CN109088462A CN109088462A CN201811175038.7A CN201811175038A CN109088462A CN 109088462 A CN109088462 A CN 109088462A CN 201811175038 A CN201811175038 A CN 201811175038A CN 109088462 A CN109088462 A CN 109088462A
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- 239000003990 capacitor Substances 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 2
- 206010037660 Pyrexia Diseases 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 14
- 239000000178 monomer Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 238000004146 energy storage Methods 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
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- 238000002955 isolation Methods 0.000 description 2
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- 241000272470 Circus Species 0.000 description 1
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- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
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- 238000010079 rubber tapping Methods 0.000 description 1
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Classifications
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H02J7/008—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention devises a kind of battery balanced device containing AC module, including battery pack, inversion unit, balanced unit, the inversion unit input terminal is connected with the anode B+ of battery pack and battery cathode B-, the input terminal of the output end of inversion unit and all balanced units is connected in series, forming circuit；The cathode output end and cathode output end of balanced unit are connected with the positive and negative anodes of wanted balanced battery cell respectively；The structure of inversion unit is bridge inverter main circuit, semibridge system inversion single channel, recommends inverse formula power transformation road and other kinds of single-phase inversion circuit；Balanced unit is the rectification circuit containing half-wave rectifying circuit, full-wave rectifying circuit, full bridge rectifier and other types.The device can carry out simultaneously Balance route to any number of single batteries, and equalization efficiency is high, in addition to inversion unit；High-speed power switching device is not needed, at low cost, control simple and flexible, fever are low, it is only necessary to controllable switch identical with single battery quantity.
Description
Technical field
The present invention relates to a kind of active equalization of battery device containing AC module, belongs to the management of the associated batteries such as lithium battery
System especially connects to multiple single batteries and carries out balanced equalizing circuit.
Background technique
With the development of lithium battery and energy storage technology, the requirement to battery management system is also higher and higher.Multiple monomer electricity
Pond series connection can lead to the problem of unbalanced since the performance of single battery itself is inconsistent in charge and discharge process, will cause battery
Aging, influence service life and the safety of battery.
Carrying out balanced method to battery at present mainly has passive type equalization methods and active equalization methods.It is wherein passive
Formula equalization methods are mainly resistance consuming type, and in an each single battery shunt resistance in parallel, energy consumption equilibrium is exactly that will hold
Extra energy consumption is fallen in the more battery of amount, realizes the equilibrium of whole group cell voltage.Such as Chinese patent CN102457078A,
CN106329667A, CN102195314A, CN107492924A, CN108063473A individually disclose several various forms of consumptions
It can formula equalizing circuit and its control method.Consuming type equilibrium, which can not only consume valuable energy, can also cause system heat generation.
Active equalization method be by monomer energy it is high to be transferred to monomer energy low, or with whole group energy supplement to monomer
Minimum battery needs an energy storage link in implementation process, energy is allowed to re-start distribution by this link well.It is Chinese special
Sharp CN 207098716U, CN103248077A, CN105391130A, CN102111003A, CN104113110A disclose several
Using the battery equalizing circuit of inductive energy storage, and CN107994651A, CN103051029A, CN107579575A,
CN107317376A, CN106816930A disclose several battery equalizing circuits using capacitive energy storage.No matter being stored up using inductance
Capacitive energy storage can be still used, requires the device for power switching of multiple high-speed switches, higher cost, control are complicated, and cannot
Balance route is carried out to any single battery simultaneously, therefore equalization efficiency is lower.
Chinese patent CN104577227A, CN104201743, CN107785957A, CN107834655A disclose several
Using transformer isolation or DC/DC converter centralization active equalization circuit is used, due to only with a transformer equilibrium
All single batteries, therefore transformer tapping is more, fabrication and installation are difficult, the variation of improper battery pack.Furthermore it needs multiple high
Fast device for power switching, control at high cost are complicated.And multiple any single batteries cannot be carried out simultaneously balanced.
In conclusion passive type equalizing circuit has the energy that can not only consume preciousness in the prior art, but also can draw
Play the problems such as system heat generation.Active equalization needs multiple high-speed power switching devices, and at high cost, control complexity needs to dissipate
Heat, cannot multiple any single batteries balanced simultaneously, equalization efficiency it is low.
Summary of the invention
The purpose of the invention is to provide a kind of battery balanced device containing AC module, compared with prior art, energy
Enough to carry out Balance route simultaneously to any number of single batteries, equalization efficiency is high, in addition to inversion unit, does not need high-speed power and opens
Device is closed, at low cost, control simple and flexible, fever are low, it is only necessary to controllable switch identical with single battery quantity.
The technical scheme adopted by the invention is as follows:
In order to achieve the above object, a kind of battery balanced device containing AC module of the invention, including battery pack, inversion
Unit, balanced unit, battery pack include anode B+, battery cathode B-, which is characterized in that the battery pack further includes detection
Line, equilibrium line；The inversion unit includes input, output end, the anode B+ and battery cathode of input terminal and battery pack
B- is connected；The balanced unit includes input terminal, cathode output end, cathode output end, the output end of inversion unit and all
The input terminal of balanced unit is connected in series, forming circuit；The cathode output end and cathode output end of the balanced unit respectively with
The positive and negative anodes of balanced battery cell are wanted to be connected；The structure of the inversion unit is bridge inverter main circuit, semibridge system inversion
Single channel recommends inverse formula power transformation road and other kinds of single-phase inversion circuit；The balanced unit is containing halfwave rectifier electricity
Road, full-wave rectifying circuit, full bridge rectifier and other types rectification circuit.
The bridge type inverse unit further includes the first power switch, the second power switch, third power switch, the 4th power
Switch, current sensor, outputting inductance；First power switch, the second power switch, third power switch, the 4th power
Switch composition single-phase bridge inverter circuit, current sensor detect the output electric current on outputting inductance, carry out Current Feedback Control.
The semibridge system inversion unit further includes the first power switch, the second power switch, current sensor, the first electricity
Hold, the second capacitor, outputting inductance；First power switch, the second power switch and first capacitor, the second capacitor composition are single-phase
Half bridge inverter circuit, current sensor detect the output electric current on outputting inductance, carry out Current Feedback Control.
The full-wave rectifying type balanced unit further includes transformer, the first rectifier diode, the second rectifier diode, filtering
Inductance, bypass controllable switch；It is connected after the primary side parallel connection bypass controllable switch of the transformer with input terminal, bypass is controllably opened
When closing connection, the primary side of transformer is bypassed, the subcarrier band centre cap of transformer, the primary side of the transformer and each secondary side
The number of turns it is identical, with the first rectifier diode, the second rectifier diode form full-wave rectifying circuit, the anode of the rectification circuit
Output end is connected after filter inductance with cathode output end, and the cathode of the rectification circuit is connected with cathode output end.
The full-bridge rectification formula balanced unit further includes transformer, the first rectifier diode, the second rectifier diode, filtering
Inductance, bypass controllable switch, third rectifier diode, the 4th rectifier diode；The primary side parallel connection bypass of the transformer is controllable
It is connected after switch with input terminal 36, when bypass controllable switch is connected, the primary side of transformer is bypassed, the secondary side of transformer and the
One rectifier diode, the second rectifier diode, third rectifier diode, the 4th rectifier diode form full bridge rectifier, institute
The cathode output end for stating rectification circuit is connected after filter inductance with cathode output end, the cathode of the rectification circuit and negative
Pole output end is connected.
The bypass controllable switch is in parallel with the primary side of transformer, is mounted between the primary side of transformer and rectification circuit,
When road controllable switch is connected, the primary side of transformer is shorted.
Forming circuit is connect with the output end of inversion unit after the primary side series connection of all transformers in the balanced unit；
Bypass controllable switch in the balanced unit is stopped by the control to bypass controllable switch when bypassing controllable switch and connecting
The only equalization operation to the battery cell connected carries out the battery cell connected when bypassing controllable switch and disconnecting balanced
Charging.
The inversion unit carries out current feedback by current sensor, to control euqalizing current size.
By the control to balanced unit, Balance route can be carried out to 1 to n-1 battery cell simultaneously, wherein n is
Battery cell number, n are the integer more than or equal to 1.
The input terminal of the inversion unit can also be connected with independent external power supply.
Since above-mentioned technical proposal is used, the present invention has following advantages and effect compared with prior art:
An effect of the invention is, using active equalization control mode, reduces energy content of battery loss, reduces balanced electricity
Resistance fever.
An effect of the invention is, carries out Balance route using AC module, and a small number of high frequency power switches are used only
Device, cost substantially reduce, and control simple and flexible.
An effect of the invention is that each balanced unit uses independent high frequency transformer, and structure is simple, installation side
Just, it can be connected with any number of batteries balanced, realize the electrical isolation of active equalization power supply and single battery, more safety can
It leans on.
An effect of the invention is, can carry out equalization operation simultaneously to any 1 to n-1 single battery, wherein
N is the number of single battery in battery pack.
An effect of the invention is, using controllable switch even relay of low frequency etc. can to balanced unit into
Row bypass makes to control greatly simplified without being controlled equalizing circuit using high frequency power switching device, reduces system
Cost.
An effect of the invention is, while carrying out Balance route to battery, can continue to supplement to battery pack
Electric energy makes battery while reaching equilibrium, also reaches full state.
Detailed description of the invention
Fig. 1 tradition consuming type equalizing circuit schematic diagram；
Fig. 2 traditional inductance stored energy transfer formula equalizing circuit schematic diagram；
Fig. 3 traditional capacitance stored energy transfer formula equalizing circuit schematic diagram；
Fig. 4 conventional monomer to group an energy transfer formula equalizing circuit schematic diagram；
Fig. 5 traditional group is to monomer energy transfer formula equalizing circuit schematic diagram；
Fig. 6 is equalizing circuit schematic diagram of the present invention；
Fig. 7 is bridge-type inversion unit schematic diagram in the present invention；
Fig. 8 is semibridge system inversion unit schematic diagram in the present invention；
Fig. 9 is the full-wave rectifying type balanced unit schematic diagram that can be bypassed in the present invention；
Figure 10 is the full-bridge rectification formula balanced unit schematic diagram that primary side can bypass in the present invention；
Figure 11 is the full-bridge rectification formula balanced unit schematic diagram that secondary side can bypass in the present invention；
Figure 12 is active equalization device application example in the present invention；
Figure 13 is that independent external power supply application example is connect in the present invention.
In attached drawing, component representated by each label:
1, battery pack, 2, inversion unit, 3, balanced unit, 4, external power supply, 101, detection line；102, equilibrium line, 201,
First power switch, 202 second power switch, 203, third power switch, the 204, the 4th power switch, 205, current sense
Device；206, input terminal, 207, output terminal, 208, first capacitor, the 209, second capacitor, 210, outputting inductance, 301, transformation
Device, the 302, first rectifier diode, the 303, second rectifier diode, 304, filter inductance, 305, bypass controllable switch, 306, defeated
Enter end, 307, cathode output end, 308, cathode output end, 309, third rectifier diode, the 310, the 4th rectifier diode.
Specific embodiment
The present invention is described further with reference to the accompanying drawing.
In the battery management system (bms) that lithium battery is representative, Balance route is single battery equalizaing charge, makes electricity
Each battery all reaches balanced consistent state in the group of pond.Balanced unit is the core component of battery management system.Battery is being made
It makes and the inconsistent phenomenon of performance can be generated in use process, performance is inconsistent to will lead to service life reduction and reliability reduction.Tradition
Balanced unit be divided into active equalization and passive balanced two major class.Passive balanced mainly resistance consuming type, in each list
A body battery shunt resistance in parallel, it is exactly to fall energy consumption extra in the battery more than capacity that energy consumption is balanced, realizes whole group
The equilibrium of cell voltage.Traditional consuming type equalizing circuit schematic diagram as shown in Figure 1, battery pack 1 by n single battery series connection group
At the detection line 101 being attached thereto detects the voltage of single battery by detection unit, controls equilibrium line by voltage detecting
102 balanced units connected.Consuming type balanced unit in Fig. 1 is made of bleeder resistance R (i) and control switch S (i),
The wherein n of i=1,2,3 ....Monomer battery voltage is obtained using detection unit, its control switch S is connected to the higher battery of voltage
(i) and by R (i) electric energy it releases, keeps the voltage of the single battery consistent with other monomers cell voltage.Thus in vain
The electric energy stored in battery is consumed, bleeder resistance R (i) is made to generate heat.
Fig. 2 is traditional inductance stored energy transfer formula equalizing circuit schematic diagram, and S (i) therein is high frequency power switching device, work
Make under HF switch state, usual switching frequency is greater than 10kHz, therefore S (i) has biggish switching loss, and fever is serious.
The equalizing circuit can only carry out electric voltage equalization between two neighboring single battery.For example, if B1 voltage is higher than B2 voltage, just
It controls S1 and carries out chop control, be stored into the electric energy on B1 in L1, and be filled in B2 by D2, it therefore, can only be successively to phase
Adjacent two batteries carry out balanced.If B1 voltage highest, Bn voltage is minimum, then balancing procedure is just very long, equalization efficiency is non-
It is often low, and a large amount of electric energy can be lost in balancing procedure.
It is similar with inductive energy storage for capacitive energy storage transfer type equalizing circuit, see Fig. 3.The energy-storage travelling wave tube of the circuit is capacitor
C(i).S (i) therein is high frequency power switching device, is worked under HF switch state, and usual switching frequency is greater than 10kHz,
Therefore S (i) has biggish switching loss, and fever is serious.The equalizing circuit can only carry out electricity between two neighboring single battery
Pressure is balanced.For example, just controlling S1, S3 and S2 if B1 voltage is higher than B2 voltage, S4 replaces fast conducting.When S1, S3 are connected
When, B1 voltage and the C1 balance of voltage, energy are passed to C1.When S1, S3 are disconnected, and S2, S4 are connected, B2 voltage and C1 voltage are flat
Weighing apparatus, electric energy are passed to B2 by C1, so alternately B1 are back and forth made to reach balanced with B2 voltage.Therefore, changing circuit can only be successively to adjacent
Two batteries carry out balanced.If B1 voltage highest, Bn voltage is minimum, then balancing procedure is just very long, equalization efficiency is very
It is low, and a large amount of electric energy can be lost in balancing procedure.Furthermore if can draw when two neighboring monomer battery voltage difference is larger
Biggish euqalizing current is played, the requirement of requirement and capacitor to device for power switching is all very high.
Fig. 4 is conventional monomer to group energy transfer formula equalizing circuit schematic diagram, and each single battery passes through connected
Converter, be filled with entire battery pack after extra electric energy is boosted.But in order to realize the control of multiple single batteries, become
Depressor production is extremely complex, as soon as each single battery requires a winding, such transformer winding number determines battery
Number, if changing the concatenated number of battery, it is necessary to remake transformer.And the installation of transformer is extremely difficult, around
The consistency of group is also difficult to ensure very much.
Fig. 5 is traditional group to monomer energy transfer formula equalizing circuit schematic diagram, is that the energy of battery pack is passed through converter
It is filled with single battery respectively, thus Balance route selectively cannot be carried out to any battery, so control effect is poor.And
And it is also similar with circuit shown in Fig. 4, there is transformer production difficulty, winding consistency is looked into, the bad problem of portfolio effect.
In order to overcome the above problem, the present invention carries out Balance route to single battery using AC converter respectively, becomes
Depressor is mutually indepedent, and simple and reliable, makes and easy for installation, flexible.Pass through the battery of capacity lagging each into battery pack 1
Monomer electric energy supplement reaches balanced purpose, and after the completion of battery pack balancing, all battery cells have reached full state.
The present embodiment as shown in fig. 6, the input terminal of inversion unit 2 is connected with the positive and negative anodes of battery pack 1, can also directly with
The positive and negative anodes of charger are connected, and are high-frequency alternating current by DC inverter, then with the input terminal of the balanced unit of series connection 3
It is connected, forms a circuit.The number of balanced unit 3 is identical as the single battery number n in battery pack 1, and balanced unit 3
Output end be connected respectively with the positive and negative anodes of corresponding single battery.
In one embodiment, inversion unit 2 uses bridge inverter main circuit, as shown in Figure 7.The bridge type inverse unit 2
Including the first power switch 201, the second power switch 202, third power switch 203, the 4th power switch 204, current sense
Device 205, input terminal 206, output terminal 207, outputting inductance 210.Wherein, power switch can be MOSFET, IGBT or
Other power electronic devices, in the present embodiment, it is only necessary to 4 high-frequency power devices, than the power in traditional equalizing circuit
Device is few very much.First power switch 201, the second power switch 202, third power switch 203, the 4th power switch
204 composition single-phase bridge inverter circuits can be with by current sensor 205 the DC inverter of input at high-frequency alternating current
The output electric current on outputting inductance 210 is detected, according to the electric current fed back, the duty ratio by controlling power switch be can control
The size for exporting electric current is allowed to consistent with to constant current, reaches optimal equalization state.
In one embodiment, inversion unit 2 uses half bridge inverter circuit, as shown in Figure 8.The semibridge system inversion list
Member 2 include the first power switch 201, the second power switch 202, current sensor 205, input terminal 206, output terminal 207,
First capacitor 208, the second capacitor 209, outputting inductance 210.First power switch 201, the second power switch 202 composition one
A bridge arm, by PWM control mode generate high frequency square wave voltage, the first capacitor 208, the second capacitor 209 using capacity compared with
Big electrolytic capacitor series connection is connected on DC bus, and mid-point voltage approximation is kept constant, and overflows an output end from its midpoint
Son 207.Current sensor 205 detects the output electric current on outputting inductance 210, carries out Current Feedback Control.Due to first capacitor
208, the second capacitor 209 divides DC bus composed by input terminal 206, therefore the amplitude of the square-wave voltage exported
It is the half of 206 both end voltage of input terminal, therefore the voltage stress that the device that can reduce balanced unit 3 is born.Due to
Only one control bridge arm, therefore there are two required high frequency power switching devices, cost is reduced.
Fig. 9 is the full-wave rectifying type balanced unit schematic diagram bypassed in the present embodiment, and the full-wave rectifying type is balanced
Unit 3, including transformer 301, the first rectifier diode 302, the second rectifier diode 303, filter inductance 304, bypass are controllably
Switch 305, input terminal 306, cathode output end 307, cathode output end 308.The subcarrier band centre cap of the transformer 301,
Primary side and it is each it is secondary while identical, or both the number of turns of the number of turns it is close and while primary side the number of turns is more than secondary slightly, to guarantee each
The Balance route of circuit can be gone on smoothly.The transformer 301 primary side parallel connection bypass controllable switch 305 after with input terminal
306 are connected.The bypass controllable switch 305 can be semi-conductor electricity sub switch, be also possible to mechanical relay or dry
Reed pipe relay etc..It can control the turn-on and turn-off of bypass controllable switch 305 by controlling signal.Make to bypass when by control
When controllable switch 305 is connected, the primary side of transformer 301 is bypassed, then the single battery B that 3 output end of balanced unit is connected
(i) without equalization operation.When make to bypass controllable switch 305 by control disconnect when, high-frequency ac that inversion unit 2 is exported
Voltage is transmitted to secondary side by transformer 301, is made into what direct current connected 3 output end of balanced unit using rectifying part
Single battery B (i) carries out equalization operation.The subcarrier band centre cap of transformer 301, it is whole with the first rectifier diode 302, second
It flows diode 303 and forms full-wave rectifying circuit, the cathode output end of the rectification circuit is defeated with anode after filter inductance 304
Outlet 307 is connected.The secondary side centre cap of the transformer 301 is connected with cathode output end 308.
In one embodiment, balanced unit 3 is the full-bridge rectification formula equalizing circuit that primary side can bypass, and sees Figure 10.It is described
The full-bridge rectification formula balanced unit 3 that primary side can bypass, including transformer 301, the first rectifier diode 302, second rectify two poles
Pipe 303, filter inductance 304, bypass controllable switch 305, input terminal 306, cathode output end 307, cathode output end 308, third
Rectifier diode 309, the 4th rectifier diode 310.The number of turns of the primary and secondary side of the transformer 301 is identical, or both
The number of turns is close and primary side the number of turns is more than secondary side slightly.To guarantee that the Balance route of each circuit can be gone on smoothly.The change
It is connected after the primary side parallel connection bypass controllable switch 305 of depressor 301 with input terminal 306.The bypass controllable switch 305 can be
Semi-conductor electricity sub switch is also possible to mechanical relay or reed switch relay etc..It can control side by controlling signal
The turn-on and turn-off of road controllable switch 305.When making to bypass the connection of controllable switch 305 by control, by the primary side of transformer 301
Bypass, then the single battery B (i) that 3 output end of balanced unit is connected is without equalization operation.Make bypass can when passing through control
When controlling the disconnection of switch 305, the high-frequency ac voltage that inversion unit 2 is exported is transmitted to secondary side by transformer 301, using whole
Stream part is made into the single battery B (i) that direct current connects 3 output end of balanced unit and carries out equalization operation.The rectification part
Divide includes the first rectifier diode 302, the second rectifier diode 303, third rectifier diode 309, the 4th rectifier diode 310
Single phase bridge type rectifier circu is formed, the cathode parallel connection of first rectifier diode 302, third rectifier diode 309 is through filtering
It is connected after wave inductance 304 with cathode output end 307, the second rectifier diode the 303, the 4th of the rectification circuit rectifies two poles
The anode parallel connection of pipe 310 is connected with cathode output end 308.
In one embodiment, the bypass controllable switch 305 of the balanced unit 3 is in parallel with the secondary side of transformer 301, place
Between the secondary side of transformer 301 and rectifying part.Can to the secondary side of transformer 301, that is, rectifying part input terminal into
Row bypass.Its effect is in parallel with the primary side of transformer 301 with bypass controllable switch 305, it can control to being connected
The Balance route of single battery B (i), as shown in figure 11.
In the present embodiment, inversion unit 2 and balanced unit 3 as shown in FIG. 6 can use different element circuits, see
Fig. 7,8,9,10,11.In one embodiment, using bridge type inverse unit 2 and 3 institute of full-wave rectifying type balanced unit that can be bypassed
The active equalization device of composition is as shown in figure 12.Wherein active equalization device, it is only necessary to 1 inversion unit 2 and n balanced unit
3, n be the number of single battery in battery pack 1.The primary side of each balanced unit 3 is connected, and output end is separately connected corresponding list
Body battery realizes equalization function.When using Balance route, while the monomer number for carrying out equalization operation is less than n.
In one embodiment, the input terminal of inversion unit 2 can connect independent external power supply 4, see Figure 13.
Balancer of the invention also constantly supplements energy during carrying out equalization operation to single battery for battery,
When n single batteries all in battery pack 1 reach equilibrium, the electric energy of battery pack 1 is also just filled with.
The foregoing description of the disclosed embodiments, being only used for professional and technical personnel in the field can be realized or use this hair
It is bright.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present invention, therefore sheet
Invention is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and innovative point phase
Consistent widest scope.
Claims (10)
1. a kind of active equalization of battery device containing AC module, including battery pack (1), inversion unit (2), balanced unit (3),
Battery pack (1) includes anode B+, battery cathode B-, which is characterized in that the battery pack (1) further include detection line (101),
Equilibrium line (102)；The inversion unit (2) includes input terminal (206), output end (207), input terminal (206) and battery pack (1)
Anode B+ be connected with battery cathode B-；The balanced unit (3) includes input terminal (306), cathode output end
(307), cathode output end (308), the output end (207) of inversion unit (2) and the input terminal (306) of all balanced units (3)
It is connected in series, forming circuit；The cathode output end (307) and cathode output end (308) of the balanced unit (3) respectively with wanted
The positive and negative anodes of balanced battery cell are connected；The structure of the inversion unit (2) is bridge inverter main circuit, semibridge system inversion list
Inverse formula power transformation road and other kinds of single-phase inversion circuit are recommended in road；The balanced unit (3) is containing halfwave rectifier electricity
Road, full-wave rectifying circuit, full bridge rectifier and other types rectification circuit.
2. a kind of active equalization of battery device containing AC module as described in claim 1, which is characterized in that the bridge-type is inverse
Becoming unit (2) further includes the first power switch (201), the second power switch (202), third power switch (203), the 4th power
Switch (204), current sensor (205), outputting inductance (210)；First power switch (201), the second power switch
(202), third power switch (203), the 4th power switch (204) form single-phase bridge inverter circuit, current sensor (205)
The output electric current on outputting inductance (210) is detected, Current Feedback Control is carried out.
3. a kind of active equalization of battery device containing AC module as described in claim 1, which is characterized in that the semibridge system
Inversion unit (2) further includes the first power switch (201), the second power switch (202), current sensor (205), first capacitor
(208), the second capacitor (209), outputting inductance (210)；First power switch (201), the second power switch (202) and
One capacitor (208), the second capacitor (209) form single-phase semi-bridge formula inverter circuit, and current sensor (205) detects outputting inductance
(210) the output electric current on carries out Current Feedback Control.
4. a kind of active equalization of battery device containing AC module as described in claim 1, which is characterized in that the all-wave is whole
Streaming balanced unit (3) further includes transformer (301), the first rectifier diode (302), the second rectifier diode (303), filtering
Inductance (304), bypass controllable switch (305)；The transformer (301) primary side parallel connection bypass controllable switch (305) afterwards with it is defeated
Enter end (306) to be connected, when bypass controllable switch (305) is connected, the primary side of transformer (301) is bypassed, transformer (301)
Subcarrier band centre cap, the primary side of the transformer (301) is identical with the number of turns on each secondary side, with the first rectifier diode
(302), the second rectifier diode (303) forms full-wave rectifying circuit, and the cathode output end of the rectification circuit passes through filtered electrical
Sense (304) is connected with cathode output end (307) afterwards, and the cathode of the rectification circuit is connected with cathode output end (308).
5. a kind of active equalization of battery device containing AC module as described in claim 1, which is characterized in that the full-bridge is whole
Streaming balanced unit (3) further includes transformer (301), the first rectifier diode (302), the second rectifier diode (303), filtering
Inductance (304), bypass controllable switch (305), third rectifier diode (309), the 4th rectifier diode (310)；The transformation
Primary side parallel connection bypass controllable switch (305) of device (301) is connected with input terminal 306 afterwards, and bypass controllable switch (305) is connected
When, the primary side of transformer (301) is bypassed, the secondary side and the first rectifier diode (302) of transformer (301), the second rectification two
Pole pipe (303), third rectifier diode (309), the 4th rectifier diode (310) form full bridge rectifier, the rectified current
The cathode output end on road is connected after filter inductance (304) with cathode output end (307), the cathode of the rectification circuit with
Cathode output end (308) is connected.
6. a kind of active equalization of battery device containing AC module as claimed in claim 5, which is characterized in that the bypass can
Control switch (305) is in parallel with the primary side of transformer (301), is mounted between the primary side and rectification circuit of transformer (301), works as road
When controllable switch (305) is connected, the primary side of transformer (301) is shorted.
7. a kind of active equalization of battery device containing AC module as described in claim 1, which is characterized in that described balanced single
Forming circuit is connect with the output end of inversion unit (2) after the primary side series connection of all transformers (301) in first (3)；It is described equal
Bypass controllable switch (305) in weighing apparatus unit (3), by the control to bypass controllable switch (305), when bypass controllable switch
(305) stop equalization operation to the battery cell connected when connecting, when bypassing controllable switch (305) and disconnecting to being connected
Battery cell carry out equalizaing charge.
8. a kind of active equalization of battery device containing AC module as described in claim 1, which is characterized in that the inversion list
First (2) carry out current feedback by current sensor (205), to control euqalizing current size.
9. a kind of active equalization of battery device containing AC module as described in claim 1, which is characterized in that by equilibrium
The control of unit (3) can carry out Balance route to 1 to n-1 battery cell simultaneously, and wherein n is battery cell number, n
For the integer more than or equal to 1.
10. a kind of active equalization of battery device containing AC module as described in claim 1, which is characterized in that the inversion
The input terminal (206) of unit (2) can also be connected with independent external power supply (4).
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