CN102801217A - Voltage-equalizing charge device for energy-accumulating facilities suitable for transformer with any transformation ratio - Google Patents
Voltage-equalizing charge device for energy-accumulating facilities suitable for transformer with any transformation ratio Download PDFInfo
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- CN102801217A CN102801217A CN2012101498443A CN201210149844A CN102801217A CN 102801217 A CN102801217 A CN 102801217A CN 2012101498443 A CN2012101498443 A CN 2012101498443A CN 201210149844 A CN201210149844 A CN 201210149844A CN 102801217 A CN102801217 A CN 102801217A
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Abstract
The invention discloses a voltage-equalizing charge device for energy-accumulating facilities suitable for a transformer with any transformation ratio, belonging to single voltage-equalizing devices for a series energy-accumulating facility group. The voltage-equalizing charge device comprises a DC/DC (direct current-direct current) converter (1), a DC/AC (direct current-alternating current) inverter (2) and n voltage-equalizing branches (3). The voltage-equalizing charge device can absorb energy from the series energy-accumulating facility group and transfer the energy to single energy-accumulating facilities with low terminal voltages in the series energy-accumulating facility group, so as to realize equalization for the terminal voltage of each single energy-accumulating facility in the series energy-accumulating facility group. The voltage-equalizing charge device disclosed by the invention has the characteristics that the device is compatible with the transformer with any transformation ratio, low in a requirement on the accuracy of the transformer, capable of being applied to any series quantity of single energy-accumulating facilities after the transformation ratio of the transformer is set, high in flexibility, and strong in universality. Moreover, the quantities of the needed transformers and diodes are low, and all switch tubes can realize soft switching, so that loss is low.
Description
Technical field
The present invention proposes a kind of energy storage system of any no-load voltage ratio transformer that is applicable to and all presses charging device, belongs to the device of the monomer energy storage system that is connected in series all being pressed charging.
Background technology
Because the voltage of energy storage system monomer is generally smaller, when the energy storage system monomer uses separately, often can not satisfy the requirement of load for magnitude of voltage, power, discharge time.In actual applications, in order to satisfy the needs of capacity and magnitude of voltage, high-power energy-storage system generally need be constituted by a plurality of monomer energy storage system series connection and parallel connection.In charging process; Because the discreteness of parameter between each monomer energy storage system; Can cause each monomer energy storage system rate of voltage rise different, make monomer energy storage system Voltage unbalance, and then cause some monomer energy storage system to overcharge; If things go on like this, certainly will have a strong impact on the useful life and the functional reliability thereof of energy storage system group.Therefore, series connection energy storage system group should be taked the electric voltage equalization measure when charging.
Many in recent years researchers have carried out deep research to the monomer voltage equalization methods of series connection energy storage system group; Electric voltage equalization method commonly used at present can be divided into two big types: one type is the method that energy shifts, for example DC/DC converter method, flying capacitance method; Another kind of is the method for energy consumption, for example switch resistance method, paraller resistanc method and voltage-stabiliser tube method.Though energy consumption type equalizer circuit is with low cost, simple in structure, energy dissipation, heating are seriously.And energy transfer equalizer circuit consumed energy in the process of electric voltage equalization is few, becomes the focus of research gradually.Introduce a representative energy transfer below and all press scheme-transformer method for equalizing voltage.
Shown in Figure 1ly be a kind of voltage balancing device that the monomer energy storage system that is connected in series is carried out charge compensation described in People's Republic of China's application for a patent for invention publication number CN101369741A number.The energy storage system group produces direct voltage; This direct voltage passes through inverter (DC/AC converter) (21) by inversion; Alternating voltage through inversion is passed to rectifier (23) through transformer (22); This rectifier (23) becomes ac voltage rectifier direct voltage and converts alternating current into direct current, whereby to the minimum monomer energy storage system charging of terminal voltage.Voltage balancing device gives a minimum monomer energy storage system charging of terminal voltage earlier; Rise to the terminal voltage of the next to the lowest monomer energy storage system of terminal voltage up to its terminal voltage; Voltage balancing device charges for these two monomer energy storage systems simultaneously then, rises to the terminal voltage of the low monomer energy storage system of terminal voltage the 3rd up to both terminal voltage, and voltage balancing device charges for these three monomer energy storage systems simultaneously then; So analogize; Equate and reach n/one of the terminal voltage of energy storage system group up to the terminal voltage of all monomer energy storage systems, realize that the terminal voltage of monomer energy storage system is balanced, n is a natural number.
There is weak point in this above-mentioned voltage balancing device based on transformer; High in the design of transformer to the no-load voltage ratio required precision; And this device designs the monomer energy storage system of the quantity that can not be applied to after the no-load voltage ratio of transformer to connect arbitrarily, and flexibility is low, versatility is not strong, and wherein also there is unbalanced problem in two dividing potential drop electric capacity operating voltages; Also have the quantity of transformer and diode to increase along with the increase of series connection energy storage system number; Suppose to have n energy storage system, so then need n transformer and 4n diode, the quantity of transformer and diode is very big.
Summary of the invention
Existing transformer method for equalizing voltage is high to the no-load voltage ratio required precision, and the transformer flexibility after designing is low, versatility is not strong.Along with the increase of series connection energy storage system unit, the required transformer and the quantity of diode are also more and more.The object of the present invention is to provide a kind of energy storage system of any no-load voltage ratio transformer that is applicable to all to press charging device; The compatible transformer of no-load voltage ratio arbitrarily of this device; Low to the transformer required precision; And this device designs the energy storage system group of the quantity that can be applied to after the no-load voltage ratio of transformer to connect arbitrarily, and flexibility is high, highly versatile.And the required transformer and the quantity of diode obviously reduce, and suppose to have 2n energy storage system, so then only need n transformer and 2n diode, reduce half the.All switching tubes can both be realized soft switch simultaneously, and loss is low.By can realize efficiently being connected in series the arbitrarily all pressures charging of monomer energy storage system of quantity of this device.
A kind of device that the super capacitor monomer that is connected in series is carried out electric voltage equalization that is applicable to comprises a DC/DC converter (1), a DC/AC inverter (2), the individual branch road (3) of all pressing of n.It is characterized in that:
Said DC/DC code converter (1) is by main open pipe (M
1), diode (D
A5, D
A6), inductance (L
0), electric capacity (C
0) DC converter formed, by auxiliary switch (M
2), resonant inductance (L
a), resonant capacitance (C
A1, C
A2), diode (D
A1, D
A2, D
A3, D
A4) auxiliary resonant net formed.Said resonant capacitance (C
A1) an end and diode (D
A2) negative pole and main switch (M
1) collector electrode be connected with the positive pole of energy storage system group; Said resonant inductance (L
a) an end and diode (D
A1) negative pole, diode (D
A2) anodal resonant electric capacity (C
A1) the other end link to each other; Said resonant inductance (L
a) the other end and resonant capacitance (C
A2) an end be connected; Said resonant capacitance (C
A2) the other end and diode (D
A3) negative pole, auxiliary switch (M
2) collector electrode be connected; Said diode (D
A3) positive pole and main switch (M
1) emitter, auxiliary switch (M
2) emitter, diode (D
A4, D
A5) negative pole, inductance (L
0) an end be connected; Said diode (D
A5) positive pole and electric capacity (C
0) an end be connected; Said inductance (L
0) the other end and electric capacity (C
0) the other end, diode (D
A1, D
A5, D
A6) positive pole be connected; Said diode (D
A6) negative pole be connected with the negative pole of energy storage system group.
Said DC/AC converter is by 4 switching tube (Q
1, Q
2, Q
3, Q
4), 4 diode (D
B1, D
B2, D
B3, D
B4) and 4 electric capacity (C
B1, C
B2, C
B3, C
B4) form.Said switching tube (Q
3) collector electrode, diode (D
B3) negative pole, electric capacity (C
B3) an end, switching tube (Q
4) collector electrode, diode (D
B4) negative pole, electric capacity (C
B4) an end, electric capacity (C
0) an end, diode (D
A5) positive pole be connected; Said switching tube (Q
3) emitter, diode (D
B3) positive pole, electric capacity (C
B3) the other end, switching tube (Q
1) collector electrode, diode (D
B1) negative pole and electric capacity (C
B1) an end be connected; Said switching tube (Q
4) emitter, diode (D
B4) positive pole, electric capacity (C
B4) the other end, switching tube (Q
2) collector electrode, diode (D
B2) negative pole and electric capacity (C
B2) an end be connected; Said switching tube (Q
1) emitter, diode (D
B1) positive pole, electric capacity (C
B1) the other end, switching tube (Q
2) emitter, diode (D
B2) positive pole, electric capacity (C
B2) the other end and diode (D
A6) positive pole be connected.Switching tube (Q
3) emitter and switching tube (Q
1) some A point lead-in wire that is connected in series of collector electrode connect an inductance (L
b) an end, inductance (L
b) the other end connect each and all press the transformer (T of branch road
n) former limit winding (n
1) end of the same name, switching tube (Q
4) emitter and switching tube (Q
2) some B point lead-in wire that is connected in series of collector electrode connect each and all press the transformer (T of branch road
n) former limit winding (n
1) the different name end.
Said n all press branch road each all press transformer (T of route
n), a diode (D
2n-1), a diode (D
2n), an energy storage system (E
2n-1) and an energy storage system (E
2n) form.Said energy storage system (E
2n-1) and energy storage system (E
2n) series arm and diode (D after being connected in series
2n-1) and diode (D
2n) series arm after the being connected in series composition that is in parallel, energy storage system (E
2n-1) and energy storage system (E
2n) series connection point and transformer (T
n) secondary winding (n
2) end of the same name link to each other diode (D
2n-1) and diode (D
2n) series connection point and transformer (T
n) secondary winding (n
2) the different name end link to each other.
Subscript n in the above-mentioned symbol is 1,2 ..., n, n is a natural number.
A kind of energy storage system that is applicable to any no-load voltage ratio transformer is all pressed the method for charging device; It is characterized in that: the terminal voltage of energy storage system group is earlier through DC/DC converter transformation; Carry out inversion through the DC/AC inverter then; Then,, can realize at last transferring to the energy of energy storage system group in the lower monomer energy storage system of voltage through after the dual transformation again through the AC/DC rectification through the transformation of transformer.
Adopt a kind of energy storage system of any no-load voltage ratio transformer that is applicable to of the present invention all to press charging device to have following beneficial effect: the compatible transformer of no-load voltage ratio arbitrarily of this device; Low to the transformer required precision; And this device designs the monomer energy storage system of the quantity that can be applied to after the no-load voltage ratio of transformer to connect arbitrarily, and flexibility is high, highly versatile.And the required transformer and the quantity of diode obviously reduce, and suppose to have n energy storage system, so then only need n transformer and 2n two utmost points, reduce half the.All switching tubes can both be realized soft switch simultaneously, and loss is low.All pressures charging of the monomer energy storage system that can efficiently realize by this device being connected in series.
Description of drawings
Fig. 1 is the sketch map of the energy transfer voltage balance circuit of patent CN101369741A;
Fig. 2 is the functional-block diagram of voltage balancing device of the present invention;
Fig. 3 is the circuit theory sketch map of an embodiment of voltage balancing device of the present invention;
Fig. 4 is the working state figure of the DC/DC translation circuit of this voltage balancing device;
Fig. 5 is the working state figure of the DC/AC inverter circuit of this voltage balancing device;
Embodiment
Shown in Figure 2 for be used for the energy storage system that is connected in series is all pressed the functional-block diagram of charging device according to the present invention.This all presses charging device to comprise a DC/DC converter (1), a DC/AC inverter (2) and a plurality of branch road (3) of all pressing, the number of all pressing branch road (3) be energy storage system number 1/2.The terminal voltage of energy storage system group is carried out transformation through DC/DC converter (1); Carry out inversion to the direct voltage after the transformation through DC/AC converter (2) then; Be passed to AC/DC rectifier (3) to the alternating voltage after inversion through a plurality of transformers at last, this AC/DC rectifier (3) converts alternating voltage into direct voltage and is applied in the lower monomer energy storage system of each terminal voltage.
Shown in Figure 3 for according to the present invention a kind of energy storage system that is applicable to any no-load voltage ratio transformer all press an embodiment of charging device.This device comprises: a DC/DC converter (1), and by main open pipe (M
1), diode (D
A5, D
A6), inductance (L
0), electric capacity (C
0) DC converter formed, by auxiliary switch (M
2), resonant inductance (L
a), resonant capacitance (C
A1, C
A2), diode (D
A1, D
A2, D
A3, D
A4) auxiliary resonant net formed; A DC/AC inverter is by 4 switching tube (Q
1, Q
2, Q
3, Q
4), 4 diode (D
B1, D
B2, D
B3, D
B4) and 4 electric capacity (C
B1, C
B2, C
B3, C
B4) form; And n all press branch road each all press transformer (T of route
n), a diode (D
2n-1), a diode (D
2n), an energy storage system (E
2n-1) and an energy storage system (E
2n) form.
Said resonant capacitance (C
A1) an end and diode (D
A2) negative pole and main switch (M
1) collector electrode be connected with the positive pole of energy storage system group; Said resonant inductance (L
a) an end and diode (D
A1) negative pole, diode (D
A2) anodal resonant electric capacity (C
A1) the other end link to each other; Said resonant inductance (L
a) the other end and resonant capacitance (C
A2) an end be connected; Said resonant capacitance (C
A2) the other end and diode (D
A3) negative pole, auxiliary switch (M
2) collector electrode be connected; Said diode (D
A3) positive pole and main switch (M
1) emitter, auxiliary switch (M
2) emitter, diode (D
A4, D
A5) negative pole, inductance (L
0) an end be connected; Said diode (D
A5) positive pole and electric capacity (C
0) an end be connected; Said inductance (L
0) the other end and electric capacity (C
0) the other end, diode (D
A1, D
A5, D
A6) positive pole be connected; Said diode (D
A6) negative pole be connected with the negative pole of energy storage system group.
Said switching tube (Q
3) collector electrode, diode (D
B3) negative pole, electric capacity (C
B3) an end, switching tube (Q
4) collector electrode, diode (D
B4) negative pole, electric capacity (C
B4) an end, electric capacity (C
0) an end, diode (D
A5) positive pole be connected; Said switching tube (Q
3) emitter, diode (D
B3) positive pole, electric capacity (C
B3) the other end, switching tube (Q
1) collector electrode, diode (D
B1) negative pole and electric capacity (C
B1) an end be connected; Said switching tube (Q
4) emitter, diode (D
B4) positive pole, electric capacity (C
B4) the other end, switching tube (Q
2) collector electrode, diode (D
B2) negative pole and electric capacity (C
B2) an end be connected; Said switching tube (Q
1) emitter, diode (D
B1) positive pole, electric capacity (C
B1) the other end, switching tube (Q
2) emitter, diode (D
B2) positive pole, electric capacity (C
B2) the other end and diode (D
A6) positive pole be connected.Switching tube (Q
3) emitter and switching tube (Q
1) some A point lead-in wire that is connected in series of collector electrode connect an inductance (L
b) an end, inductance (L
b) the other end connect each and all press the transformer (T of branch road
n) former limit winding (n
1) end of the same name, switching tube (Q
4) emitter and switching tube (Q
2) some B point lead-in wire that is connected in series of collector electrode connect each and all press the transformer (T of branch road
n) former limit winding (n
1) the different name end.
Said energy storage system (E
2n-1) and energy storage system (E
2n) series arm and diode (D after being connected in series
2n-1) and diode (D
2n) series arm after the being connected in series composition that is in parallel, energy storage system (E
2n-1) and energy storage system (E
2n) series connection point and transformer (T
n) secondary winding (n
2) end of the same name link to each other diode (D
2n-1) and diode (D
2n) series connection point and transformer (T
n) secondary winding (n
2) the different name end link to each other.
Subscript n in the above-mentioned symbol is 1,2 ..., n, n is a natural number.
In order to make those skilled in the art fully understand the course of work of the present invention, cooperate Fig. 3 to further specify below, simplify here and analyze, we suppose that all components and parts all are desirable in the circuit, the terminal voltage of supposing the energy storage system group is U
In, the average voltage of energy storage system group is U
V, each monomer energy storage system voltage is U
En(n=1,2 ..., n, n is a natural number), the voltage of the output of DC/DC converter is U
0, all press the original edge voltage and the secondary voltage of the transformer of branch road to be respectively U
ABAnd U
CD, the no-load voltage ratio of transformer is k, flows through inductance L
bElectric current be i
P, switching tube M
1Duty ratio be D, wherein U
0=U
AB, U
AB=kU
CD,
Then have
Should choose suitable all pressures branch road transformer voltage ratio K in this embodiment earlier, and then suitably adjust the main switch (M in the converter
1) duty ratio D, according to formula
Can make terminal voltage n/one of the big or small a little higher than energy storage system group of transformer secondary output voltage neatly, n is a natural number.
The DC/DC converter is earlier the terminal voltage U of energy storage system group
InBe transformed to U
0, the DC/AC converter is with the voltage U of DC/DC converter output
0Be reverse into alternating voltage U
AB, be U through the transformer transformation again
CD, because transformers connected in parallel and no-load voltage ratio are k, so each transformer secondary voltage voltage U
CDEqual and opposite in direction is at alternating voltage U
CDJust half work period time, this moment E
1, E
3..., E
2n-1In terminal voltage minimum and be lower than average voltage U
VMonomer energy storage system E
2n-1Corresponding rectifier diode D
2n-1Elder generation's conducting, other not conducting of rectifier diode becomes direct voltage with ac voltage rectifier, and alternating current is converted into direct current, whereby to E
1, E
3..., E
2n-1In terminal voltage minimum and be lower than average voltage U
VMonomer energy storage system E
2n-1Charging.Simultaneously, the conducting of this rectifier diode is all pressed the secondary voltage U of branch road transformation with all
CDPositive half period be clamped on than low value, make other monomer energy storage system not have electric current to flow into or only flow into minimum electric current.
In like manner, at alternating voltage U
CDNegative half work period the time, this moment E
2, E
4..., E
2nIn terminal voltage minimum and be lower than average voltage U
VMonomer energy storage system E
2nCorresponding rectifier diode D
2nElder generation's conducting, other not conducting of rectifier diode becomes direct voltage with ac voltage rectifier, and alternating current is converted into direct current, whereby to E
2, E
4..., E
2nIn terminal voltage minimum and be lower than average voltage U
VMonomer energy storage system E
2nCharging.Simultaneously, the conducting of this rectifier diode is all pressed the secondary voltage U of branch road transformation with all
CDPositive half period be clamped on than low value, make other monomer energy storage system not have electric current to flow into or only flow into minimum electric current.So analogize, the terminal voltage that can obtain all monomer energy storage systems at last equates.
Shown in Figure 4 for according to the present invention a kind of energy storage system that is applicable to any no-load voltage ratio transformer all press the operation mode figure of the DC/DC translation circuit (1) of charging device.The operation mode of the DC/DC translation circuit of charging device of all pressing shown in Figure 3 is analyzed total following 6 kinds of mode of operations below with reference to Fig. 4:
Pattern 1 (t
0): t
0As shown in Figure 5 before: main switch M
1Conducting, auxiliary switch M
2Turn-off, auxiliary network is not worked.
Pattern 2 (t
0-t
1): t
0The time, auxiliary switch M
2Zero current passing, L
aWith C
A1And C
A2Resonance takes place, and inductive current is started from scratch to be increased by sinusoidal rule, main switch M
1Electric current then reduce with sinusoidal rule, up to i
LaReach maximum, main switch M
1Electric current drops to zero, turn-offs main switch M this moment
1, realized main switch M
1Zero-current switching.Main switch M
1Electric current drops to zero, turn-offs main switch M this moment
1, realized main switch M
1Zero-current switching.
Mode 3 (t
1-t
2): t
1The time, main switch M
1Turn-off main open pipe voltage U
M1Rising, resonant capacitance C
A1, C
A2Voltage also raises gradually.Work as U
Cr1=U
InThe time, D
A1Conducting, the resonance branch road is from M
2, L
a, C
A1And C
A2Transfer to L
a, C
A2, M
2, D0 and D
A1The loop, the resonant inductance energy stored is to capacitor C
A2Shift resonant inductance L
aElectric current reduces gradually, sustained diode
A4Electric current increases gradually, for zero current is connected.When the resonant inductance current i
LaWhen being zero, capacitor C
A2Voltage reaches maximum, D
A1End, this resonance branch road stops resonance.C in the circuit
A1Both as resonant capacitance, again with D
A1Constitute the resonant network change-over circuit, and by C
A1And D
A1It is to guarantee resonant inductance L that the resonance branch road that constitutes shifts
aEnergy continues to capacitor C
A2Shift the key point that realizes the auxiliary switch zero-current switching.
Pattern 4 (t
2-t
3): t
2The time, i
La=0, the auxiliary switch M that connects with it
2Electric current also is zero, from t
2Begin to turn-off auxiliary switch M in the period to this section of being responsible for before connecting
2Can realize the zero-current switching of auxiliary tube.Auxiliary network quit work after auxiliary tube turn-offed, and circuit operates in inductance L
0Be in the conventional PWM mode of afterflow state, be inductance L
0The afterflow stage.
Pattern 5 (t
3-t
4): t
3The time, main switch M
1Conducting, circuit is on the one hand to inductance L
0The charging and to electric, be resonant element energy reseting procedure on the other hand, resonant inductance L
aWith C
A1And C
A2Resonance takes place, capacitor C
A1Voltage U
Cr1Reduce gradually.
Pattern 6 (t
4-t
5) t
4The time, U
Cr1=0 o'clock, D
A2Conducting, L
aWith C
A2Continue resonance, up to resonant inductance L
aCurrent i
La=0 o'clock, D in the middle of the resonance
A3And D
A2End, circuit stops resonance, and the resonant inductance energy is all transferred on the electric capacity, C
A2Voltage remains on-U
Crmax, C
A1Voltage remains zero, for next switch periods main switch zero-current switching is prepared.t
5Auxiliary network is not worked later on, and circuit is got back to conventional PWM operational mode again, repeats a switch periods job.So main switch M
1With auxiliary switch M
2Belong to zero current turning-on and zero-current switching, realized switching tube M
1, M
2Soft switch.
Shown in Figure 5 for according to the present invention a kind of energy storage system that is applicable to any no-load voltage ratio transformer all press inverter circuit (2) the operation mode figure of charging device.If transformer voltage ratio k=N
1/ N
2, at time t
0Before be Q
1, Q
4Conducting, U
AB=U
0, output voltage compares U
K=U
0N
2/ N
1, the resonant inductance current i
P=i
LbN
2/ N
1, U
C1=U
C3=0, U
C2=U
C4=U
0The operation mode of the inverter circuit of voltage balancing device shown in Figure 3 is analyzed total following 5 kinds of mode of operations below with reference to Fig. 5:
Pattern 1 (t
0): t
0The time, switching tube Q
1, Q
4Conducting, U
ABFor on the occasion of, current i
LbFrom liter above freezing, all press the transformer secondary voltage U of branch road
CDFor on the occasion of, so E
1, E
3..., E
2n-1Middle terminal voltage is lower than one or more monomer energy storage system E of transformer secondary voltage size
2n-1The corresponding rectifier diode D that all presses branch road
2n-1Conducting, the transformer primary current is through switching tube Q
4, capacitor C
0, switching tube Q
1And leakage inductance L
bFlow, the transformer secondary current is through rectifier diode D
2n-1And monomer energy storage system E
2n-1Flow, whereby to E
1, E
3..., E
2n-1Middle terminal voltage is lower than one or more monomer energy storage system E of transformer secondary voltage size
2n-1Charging.
Pattern 2 (t
0-t
1): t
0The time, Q
1Turn-off i
Q1Begin to descend capacitor C
B1Since 0 charging, U
Cb1Progressively rise, make Q
1Soft shutoff.This stage L
bWith the former limit of transformer equivalent inductance through Q
4, D
B3Discharge energy storage, because former limit equivalent inductance K
2L is bigger, makes primary current i
PIt is very slow, constant basically to descend.Transformer original edge voltage U
ABWith U
Cb1Charging and U
Cb3Discharge, progressively descend, to t
1The time be U
AB=0, output U
0Also change to 0 simultaneously.
Mode 3 (t
1-t
2): t
1The time, because C
B3Discharge finishes, i
P＞0, so D
B3Conducting, i
PThrough Lr-Q
4-D
B3Afterflow, i
PDescend.At t
1-t
2In because D
B3Conducting, U
Cb3=0, so Q
3Can be in the zero-voltage state conducting.
Pattern 4 (t
2-t
3): t
2The time, Q
4Turn-off, and parallelly connected with it C
B4Charging needs certain hour, so Q
4Can under zero-voltage state, turn-off.With C
B4Charging, U
Cb4Raise, B point current potential rises, U
ABProgressively oppositely increase U from 0
ABGet into negative half period.C
B4Charging current is still equivalent inductance and L
bFreewheel current, this electric current is on the one hand through C
B4-D
B3-L
bGive C
B4Charging is simultaneously also through C
2-C
0-D
B3With the energy storage feedback power.
Pattern 5 (t
3-t
4-t
5): t
3The time, with C
B2Discharge finishes, D
B2Conducting, U
Cb20, so Q
2Can be in the zero-voltage state conducting, so i
PThrough D
B2And D
B3Afterflow, electric current descends rapidly.At t
4The time i
PTo 0, because Q
2, Q
3The beginning conducting, i
PNegative sense increases, L
bReverse energy storage.At t
4-t
5Between U
AB=-U
0, U
d=U
0N
2/ N
1, all press the transformer original edge voltage U of branch road
ABBe negative value, so E
2, E
4..., E
2nIn terminal voltage be lower than one or more monomer energy storage system E of transformer secondary voltage order of magnitude
2nThe corresponding rectifier diode D that all presses branch road
2nConducting, the transformer primary current is through switching tube Q
3, capacitor C
0, switching tube Q
2And leakage inductance L
bFlow, the transformer secondary current is through rectifier diode D
2nAnd monomer energy storage system E
2nFlow, whereby to E
2, E
4..., E
2nIn terminal voltage be lower than one or more monomer energy storage system E of transformer secondary voltage order of magnitude
2nCharging.
t
5After change of current situation similar with above-mentioned analytic process, t
6-t
11Stage in like manner can push away.So switching tube Q
1, Q
2, Q
3, Q
4Belong to no-voltage conducting and no-voltage and turn-off, realized switching tube Q
1, Q
2, Q
3, Q
4Soft switch.
Claims (5)
1. an energy storage system that is applicable to any no-load voltage ratio transformer is all pressed charging device, comprises a DC/DC converter (1), a DC/AC inverter (2), the individual branch road (3) of all pressing of n.
2. said DC/DC converter (1) is by main open pipe (M
1), diode (D
A5, D
A6), inductance (L
0), electric capacity (C
0) DC converter formed, by auxiliary switch (M
2), resonant inductance (L
a), resonant capacitance (C
A1, C
A2), diode (D
A1, D
A2, D
A3, D
A4) auxiliary resonant net formed, it is characterized in that: said resonant capacitance (C
A1) an end and diode (D
A2) negative pole and main switch (M
1) collector electrode be connected with the positive pole of energy storage system group; Said resonant inductance (L
a) an end and diode (D
A1) negative pole, diode (D
A2) anodal resonant electric capacity (C
A1) the other end link to each other; Said resonant inductance (L
a) the other end and resonant capacitance (C
A2) an end be connected; Said resonant capacitance (C
A2) the other end and diode (D
A3) negative pole, auxiliary switch (M
2) collector electrode be connected; Said diode (D
A3) positive pole and main switch (M
1) emitter, auxiliary switch (M
2) emitter, diode (D
A4, D
A5) negative pole, inductance (L
0) an end be connected; Said diode (D
A5) positive pole and electric capacity (C
0) an end be connected; Said inductance (L
0) the other end and electric capacity (C
0) the other end, diode (D
A1, D
A5, D
A6) positive pole be connected; Said diode (D
A6) negative pole be connected with the negative pole of energy storage system group.
3. said DC/AC converter is by 4 switching tube (Q
1, Q
2, Q
3, Q
4), 4 diode (D
B1, D
B2, D
B3, D
B4) and 4 electric capacity (C
B1, C
B2, C
B3, C
B4) form, it is characterized in that: said switching tube (Q
3) collector electrode, diode (D
B3) negative pole, electric capacity (C
B3) an end, switching tube (Q
4) collector electrode, diode (D
B4) negative pole, electric capacity (C
B4) an end, electric capacity (C
0) an end, diode (D
A5) positive pole be connected; Said switching tube (Q
3) emitter, diode (D
B3) positive pole, electric capacity (C
B3) the other end, switching tube (Q
1) collector electrode, diode (D
B1) negative pole and electric capacity (C
B1) an end be connected; Said switching tube (Q
4) emitter, diode (D
B4) positive pole, electric capacity (C
B4) the other end, switching tube (Q
2) collector electrode, diode (D
B2) negative pole and electric capacity (C
B2) an end be connected; Said switching tube (Q
1) emitter, diode (D
B1) positive pole, electric capacity (C
B1) the other end, switching tube (Q
2) emitter, diode (D
B2) positive pole, electric capacity (C
B2) the other end and diode (D
A6) positive pole be connected switching tube (Q
3) emitter and switching tube (Q
1) some A point lead-in wire that is connected in series of collector electrode connect an inductance (L
b) an end, inductance (L
b) the other end connect each and all press the transformer (T of branch road
n) former limit winding (n
1) end of the same name, switching tube (Q
4) emitter and switching tube (Q
2) some B point lead-in wire that is connected in series of collector electrode connect each and all press the transformer (T of branch road
n) former limit winding (n
1) the different name end.
4. said n all press branch road each all press transformer (T of route
n), a diode (D
2n-1), a diode (D
2n), an energy storage system (E
2n-1) and an energy storage system (E
2n) form, it is characterized in that: said energy storage system (E
2n-1) and energy storage system (E
2n) series arm and diode (D after being connected in series
2n-1) and diode (D
2n) series arm after the being connected in series composition that is in parallel, energy storage system (E
2n-1) and energy storage system (E
2n) series connection point and transformer (T
n) secondary winding (n
2) end of the same name link to each other diode (D
2n-1) and diode (D
2n) series connection point and transformer (T
n) secondary winding (n
2) the different name end link to each other.N in the above-mentioned symbol is 1,2 ..., n, n is a natural number.
5. said energy storage system comprises super capacitor and lithium-ions battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101498443A CN102801217A (en) | 2012-05-08 | 2012-05-08 | Voltage-equalizing charge device for energy-accumulating facilities suitable for transformer with any transformation ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101498443A CN102801217A (en) | 2012-05-08 | 2012-05-08 | Voltage-equalizing charge device for energy-accumulating facilities suitable for transformer with any transformation ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102801217A true CN102801217A (en) | 2012-11-28 |
Family
ID=47200231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101498443A Pending CN102801217A (en) | 2012-05-08 | 2012-05-08 | Voltage-equalizing charge device for energy-accumulating facilities suitable for transformer with any transformation ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102801217A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572189A (en) * | 2019-09-29 | 2021-03-30 | 比亚迪股份有限公司 | Vehicle-mounted charging and discharging system and vehicle with same |
| CN114342236A (en) * | 2020-07-29 | 2022-04-12 | 华为数字能源技术有限公司 | Conversion circuit and related electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2424560Y (en) * | 2000-03-30 | 2001-03-21 | 黄以安 | Balance charger of battery |
| CN1977439A (en) * | 2004-06-28 | 2007-06-06 | 西门子公司 | Device and method for equalizing charges of series-connected energy stores |
| CN101369741A (en) * | 2008-07-09 | 2009-02-18 | 南京航空航天大学 | Apparatus and method for electric voltage equalization of accumulator units connected in series |
-
2012
- 2012-05-08 CN CN2012101498443A patent/CN102801217A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2424560Y (en) * | 2000-03-30 | 2001-03-21 | 黄以安 | Balance charger of battery |
| CN1977439A (en) * | 2004-06-28 | 2007-06-06 | 西门子公司 | Device and method for equalizing charges of series-connected energy stores |
| CN101369741A (en) * | 2008-07-09 | 2009-02-18 | 南京航空航天大学 | Apparatus and method for electric voltage equalization of accumulator units connected in series |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572189A (en) * | 2019-09-29 | 2021-03-30 | 比亚迪股份有限公司 | Vehicle-mounted charging and discharging system and vehicle with same |
| CN112572189B (en) * | 2019-09-29 | 2022-03-18 | 比亚迪股份有限公司 | Vehicle-mounted charging and discharging system and vehicle with same |
| CN114342236A (en) * | 2020-07-29 | 2022-04-12 | 华为数字能源技术有限公司 | Conversion circuit and related electronic device |
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Application publication date: 20121128 |