CN202679079U - An energy storage device equalizing charge device applicable to a transformer with a random transformation ratio - Google Patents
An energy storage device equalizing charge device applicable to a transformer with a random transformation ratio Download PDFInfo
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- CN202679079U CN202679079U CN 201220220083 CN201220220083U CN202679079U CN 202679079 U CN202679079 U CN 202679079U CN 201220220083 CN201220220083 CN 201220220083 CN 201220220083 U CN201220220083 U CN 201220220083U CN 202679079 U CN202679079 U CN 202679079U
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Abstract
The utility model provides an energy storage device equalizing charge device applicable to a transformer with a random transformation ratio and belongs to a single voltage equalizing device of an energy storage device group in series. The equalizing charge device comprising a DC/DC converter (1), a DC/AC inverter (2), and n voltage equalizing branches (3) is capable of acquiring energy from the energy storage device group in series and transferring the energy to single energy storage devices with lower terminal voltages in the energy storage device group in series in order to achieve equalized terminal voltages of single energy storage devices in the energy storage device group in series. The equalizing charge device is characterized in that the device is compatible with the transformer with a random transformation ratio, that accuracy requirement of the transformer is low, that the device can be applied to the single energy storage device with random amount of energy storage devices in series after the transformation ratio of the transformer is designed, and that the device has strong flexibility and strong versatility. In addition, low loss is achieved by the low number of required transformers and diodes and all switching tubes equipped with soft switching capability.
Description
Technical field
The utility model proposes a kind of energy storage system that is applicable to any no-load voltage ratio transformer and all press charging device, belong 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, often can not satisfy the requirement of load for magnitude of voltage, power, discharge time when the energy storage system monomer uses separately.In actual applications, in order to satisfy the needs of capacity and magnitude of voltage, high-power energy-storage system generally need to be constituted by a plurality of monomer energy storage system series and parallel connections.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 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 researchers conduct in-depth research the monomer voltage equalization methods of series connection energy storage system group in recent years, voltage balancing method commonly used can be divided into two large classes at present: a class is the method that energy shifts, for example DC/DC converter method, flying capacitance method; Another kind of is the method that energy consumes, for example switch resistance method, paraller resistanc method and voltage-stabiliser tube method.Although 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 gradually the focus of research.The below introduces a representative energy transfer and all presses scheme-transformer method for equalizing voltage.
Figure 1 shows that 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 (31) by inversion, alternating voltage through inversion is passed to rectifier by transformer, this rectifier becomes ac voltage rectifier direct voltage and alternating current is converted to direct current, whereby to the minimum monomer energy storage system charging of terminal voltage.Voltage balancing device gives first a minimum monomer energy storage system charging of terminal voltage, until its terminal voltage rises to the terminal voltage of the next to the lowest monomer energy storage system of terminal voltage, then voltage balancing device charges for these two monomer energy storage systems simultaneously, until both terminal voltages rise to the terminal voltage of the low monomer energy storage system of terminal voltage the 3rd, then voltage balancing device charges for these three monomer energy storage systems simultaneously, so analogize, until the terminal voltage of all monomer energy storage systems equates and reaches the n of the terminal voltage of energy storage system group/one, the terminal voltage that realizes the monomer energy storage system is balanced, and n is natural number.
This above-mentioned voltage balancing device Shortcomings part based on transformer, high to the no-load voltage ratio required precision in the design of transformer, 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, flexibility is low, versatility is not strong, 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 large.
The utility model content
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, required transformer and the quantity of diode are also more and more.The purpose of this utility model is to provide a kind of energy storage system that is applicable to any no-load voltage ratio transformer all to press charging device, the compatible arbitrarily transformer of no-load voltage ratio 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 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.All switching tubes can both be realized soft switch simultaneously, and loss is low.Can realize efficiently being connected in series arbitrarily all pressures charging of the monomer energy storage system of quantity by this device.
A kind of device that is applicable to the super capacitor monomer that is connected in series is carried out electric voltage equalization 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:
Described 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 that forms, 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 that forms.Described 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; Described resonant inductance (L
a) an end and diode (D
A1) negative pole, diode (D
A2) positive pole and resonant capacitance (C
A1) the other end link to each other; Described resonant inductance (L
a) the other end and resonant capacitance (C
A2) an end be connected; Described resonant capacitance (C
A2) the other end and diode (D
A3) negative pole, auxiliary switch (M
2) collector electrode be connected; Described 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; Described diode (D
A5) positive pole and electric capacity (C
0) an end be connected; Described 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; Described diode (D
A6) negative pole be connected with the negative pole of energy storage system group.
Described 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.Described 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; Described 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; Described 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; Described 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 the transformer (T that each all presses branch road
n) former limit winding (n
1) Same Name of Ends, 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.
Described 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.Described 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) Same Name of Ends 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 natural number.
Above-mentioned energy storage system comprises super capacitor and lithium-ions battery.
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 first by DC/DC converter transformation, then carry out inversion by the DC/AC inverter, follow the transformation by transformer, by the AC/DC rectification, can realize at last the energy of energy storage system group is transferred in the lower monomer energy storage system of voltage through after the dual transformation again.
Adopt a kind of energy storage system that is applicable to any no-load voltage ratio transformer of the utility model all to press charging device to have following beneficial effect: the compatible arbitrarily transformer of no-load voltage ratio 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 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 two utmost points, reduce half.All switching tubes can both be realized soft switch simultaneously, and loss is low.Can efficiently realize all pressures charging of the monomer energy storage system that is connected in series by this device.
Description of drawings
Fig. 1 is the schematic diagram of the energy transfer voltage balance circuit of patent CN101369741A;
Fig. 2 is the functional-block diagram of voltage balancing device of the present utility model;
Fig. 3 is the circuit theory schematic diagram of an embodiment of voltage balancing device of the present utility model;
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
Figure 2 shows that the functional-block diagram that is used for the energy storage system that is connected in series is all pressed charging device according to the utility model.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), then the direct voltage after the transformation is carried out inversion by DC/AC converter (2), at last the alternating voltage after inversion is passed to AC/DC rectifier (3) by a plurality of transformers, this AC/DC rectifier (3) is converted to direct voltage with alternating voltage and is applied in the lower monomer energy storage system of each terminal voltage.
Figure 3 shows that an embodiment who all presses charging device according to a kind of energy storage system that is applicable to any no-load voltage ratio transformer of the utility model.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 that forms, 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 that forms; 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.
Described 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; Described resonant inductance (L
a) an end and diode (D
A1) negative pole, diode (D
A2) positive pole and resonant capacitance (C
A1) the other end link to each other; Described resonant inductance (L
a) the other end and resonant capacitance (C
A2) an end be connected; Described resonant capacitance (C
A2) the other end and diode (D
A3) negative pole, auxiliary switch (M
2) collector electrode be connected; Described 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; Described diode (D
A5) positive pole and electric capacity (C
0) an end be connected; Described 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; Described diode (D
A6) negative pole be connected with the negative pole of energy storage system group.
Described 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; Described 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; Described 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; Described 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 the transformer (T that each all presses branch road
n) former limit winding (n
1) Same Name of Ends, 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.
Described 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) Same Name of Ends 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 natural number.
In order to make those skilled in the art fully understand the course of work of the present utility model, the below cooperates Fig. 3 to further specify, and simplifies here and analyzes, and we suppose that all components and parts all are desirable in the circuit, and 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 is natural number), the voltage of the output of DC/DC converter is U
0, all press 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 first in this embodiment suitable all pressures branch road transformer voltage ratio K, and then suitably adjust the main switch (M in the converter
1) duty ratio D, according to formula
Can make neatly the terminal voltage n of the big or small a little higher than energy storage system group of transformer secondary output voltage/one, n is natural number.
The DC/DC converter is first 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 by 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-1Middle 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-1Middle 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 lower 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 time, this moment E
2, E
4..., E
2nMiddle 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
2nMiddle 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 lower 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 at last all monomer energy storage systems equates.
Figure 4 shows that the operation mode figure that all presses the DC/DC translation circuit (1) of charging device according to a kind of energy storage system that is applicable to any no-load voltage ratio transformer of the utility model.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: main switch M before
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 occurs, and inductive current is started from scratch to be increased by sinusoidal rule, main switch M
1Electric current then reduce with sinusoidal rule, until 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 both end 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 energy that resonant inductance stores 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
A2Both end voltage reaches maximum, D
A1Cut-off, this resonance branch road stops resonance.C in the circuit
A1Both as resonant capacitance, again with D
A1Consist of the resonant network change-over circuit, and by C
A1And D
A1It is to guarantee resonant inductance L that the resonance branch road that consists of 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 connect this front section to supervisor and turn-off auxiliary switch M in the period
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 load supplying, be resonant element energy reseting procedure on the other hand, resonant inductance L
aWith C
A1And C
A2Resonance occurs, capacitor C
A1Both end voltage U
Cr1Reduce gradually.
Pattern 6 (t
4-t
5) t
4The time, U
Cr1=0 o'clock, D
A2Conducting, L
aWith C
A2Continue resonance, until resonant inductance L
aElectric current I
La=0 o'clock, D in the middle of the resonance
A3And D
A2Cut-off, circuit stops resonance, and the resonant inductance energy is all transferred on the electric capacity, C
A2Voltage remains on-U
Cr max, 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 again conventional PWM operational mode, 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.
Figure 5 shows that inverter circuit (2) the operation mode figure that all presses charging device according to a kind of energy storage system that is applicable to any no-load voltage ratio transformer of the utility model.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 side electric 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 transformer primary side equivalent inductance through Q
4, D
B3Discharge energy storage, because former limit equivalent inductance K
2L is larger, makes primary current i
PDescend very slow, substantially constant.The transformer primary side voltage U
ABWith U
Cb1Charging and U
Cb3Discharge, progressively descend, to t
1The time be U
AB=0, output U
0Also change to simultaneously 0.
Mode 3 (t
1-t
2): t
1The time, because C
B3Discharge finishes, i
P＞0, therefore 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 in parallel C with it
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
ABEnter 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
B givesC
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
bOppositely energy storage.At t
4-t
5Between U
AB=-U
0, U
d=U
0N
2/ N
1, all press the transformer primary side 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 electric 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 to 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 (2)
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; It is characterized in that, described 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 that forms, 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 that forms, described resonant capacitance (C
A1) an end and diode (D
A2) negative pole and main switch (M
1) collector electrode be connected described resonant inductance (L with the positive pole of energy storage system group
a) an end and diode (D
A1) negative pole, diode (D
A2) positive pole and resonant capacitance (C
A1) the other end link to each other described resonant inductance (L
a) the other end and resonant capacitance (C
A2) an end be connected described resonant capacitance (C
A2) the other end and diode (D
A3) negative pole, auxiliary switch (M
2) collector electrode be connected described 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 described diode (D
A5) positive pole and electric capacity (C
0) an end be connected described 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 described diode (D
A6) negative pole be connected with the negative pole of energy storage system group; Described DC/AC inverter (2) 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 described 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 described 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 described 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 described 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 the transformer (T that each all presses branch road
n) former limit winding (n
1) Same Name of Ends, 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; Described 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 described 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) Same Name of Ends 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 natural number.
2. a kind of energy storage system that is applicable to any no-load voltage ratio transformer according to claim 1 is all pressed charging device, it is characterized in that energy storage system comprises super capacitor and lithium-ions battery.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220220083 CN202679079U (en) | 2012-05-08 | 2012-05-08 | An energy storage device equalizing charge device applicable to a transformer with a random transformation ratio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220220083 CN202679079U (en) | 2012-05-08 | 2012-05-08 | An energy storage device equalizing charge device applicable to a transformer with a random transformation ratio |
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| Publication Number | Publication Date |
|---|---|
| CN202679079U true CN202679079U (en) | 2013-01-16 |
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ID=47499954
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| Country | Link |
|---|---|
| CN (1) | CN202679079U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052123A (en) * | 2014-06-25 | 2014-09-17 | 哈尔滨工程大学 | Super-capacitor series connection voltage equalizing circuit |
| CN114734842A (en) * | 2022-03-16 | 2022-07-12 | 昆明理工大学 | Low-voltage large-current wireless charging system with bilateral LCC-nT topology |
-
2012
- 2012-05-08 CN CN 201220220083 patent/CN202679079U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052123A (en) * | 2014-06-25 | 2014-09-17 | 哈尔滨工程大学 | Super-capacitor series connection voltage equalizing circuit |
| CN104052123B (en) * | 2014-06-25 | 2016-05-04 | 哈尔滨工程大学 | A kind of super capacitor series average-voltage circuit |
| CN114734842A (en) * | 2022-03-16 | 2022-07-12 | 昆明理工大学 | Low-voltage large-current wireless charging system with bilateral LCC-nT topology |
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