CN204809925U - Multiplexed output charging circuit with feed back balanced function - Google Patents
Multiplexed output charging circuit with feed back balanced function Download PDFInfo
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- CN204809925U CN204809925U CN201520475523.1U CN201520475523U CN204809925U CN 204809925 U CN204809925 U CN 204809925U CN 201520475523 U CN201520475523 U CN 201520475523U CN 204809925 U CN204809925 U CN 204809925U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a multiplexed output charging circuit with feed back balanced function. This circuit contains the serial and fills electronic circuit, parallel electronic circuit and the electric energy feedback sub circuit of filling, wherein the serial fill electronic circuit and carry out whole series connection to series battery and charge, the parallel electronic circuit output multichannel DC power supply that fills, the input positive pole of electric energy feedback sub circuit connects series battery's positive pole, and the input negative pole of electric energy feedback sub circuit connects series battery's negative pole, and electric energy feedback sub circuit feeds back to the parallel electronic circuit that fills with the electric energy of group battery through the transform of isolated DCDC. The advantage lies in: can realize charging to the free differentiation of every battery, make every the battery monomer in the group battery can all be full of rated capacity, realize to the group battery that quick, efficient charges, can conveniently realize between interior each the battery monomer of group battery and the equilibrium of the electric quantity between a plurality of group battery. Be applicable to charging of the group battery that forms to establishing ties by a plurality of battery monomers.
Description
Technical field
The utility model relates to a kind of and charging circuit of the battery pack that formed monomer series-connected by multiple rechargeable battery, a kind of multiple-channel output charging circuit with feedback equalization function specifically.
Background technology
Rechargeable battery overcharges, mistake is placed with and may causes damage to battery, affects the performance of battery, even makes battery scrap.The voltage of rechargeable battery monomer is usually lower, usually needs polylith battery cell to be together in series, and composition series battery, to obtain higher voltage.When using battery cell composition series battery, because the performance of each battery cell has different, the particularly difference of capacity aspect, so when carrying out overall serial connection charge to battery pack, in order to not cause overcharging of any one piece of battery cell, just need the charging stopping whole battery pack when the battery of minimum capacity is charged to rated capacity.When battery power discharge, in order to not cause the mistake of any one piece of battery cell to put, just need the electric discharge stopping whole battery pack under the fastest battery cell of electric discharge reaches regular picture in limited time.So usually cause the available capacity of whole battery pack not reach its rated capacity, namely the rated capacity sum of each battery cell in battery pack, has a long way to go sometimes.
To reach to make the available capacity of battery pack or close to rated capacity, equalizer is adopted to carry out electric energy transfer and equilibrium in a lot of battery set management circuit, but balancing procedure needs to expend the long period, have impact on charging rate, and charging rate is an important indicator of battery pack.Meanwhile, most of equalizer can not carry out equilibrium while charge or discharge.
Therefore how to realize battery pack available capacity consistent with rated capacity, quick charge can be realized again, while charging and discharging can dynamic implement battery capacity balanced etc. in, still have the very large space had much room for improvement technically.In the management of charging and discharging of bank of super capacitors, also there is similar problem.
Summary of the invention
The purpose of this utility model is to provide a kind of can realization to charge to the differentiation of battery cell each in battery pack, can also realize charging fast and efficiently to battery pack; Both can realize the electric quantity balancing of each battery cell in battery pack easily, also can realize a kind of multiple-channel output charging circuit with feedback equalization function of the electric quantity balancing between battery pack easily.
The multiple-channel output charging circuit with feedback equalization function described in the utility model comprises three electronic circuits: serial charging electronic circuit, parallel charging electronic circuit, back electrical energy electronic circuit.Wherein serial charging electronic circuit can carry out entirety charging to battery pack, parallel charging electronic circuit can carry out charge independence to each battery cell in battery pack, back electrical energy electronic circuit by the output back electrical energy of battery pack to parallel charging electronic circuit, thus can realize the redistribution of energy between each battery cell in battery pack.These three sub-inside circuits have switch element, can realize operation and the stoppage in transit of each electronic circuit.
The serial charging electronic circuit had in the multiple-channel output charging circuit of feedback equalization function described in the utility model, comprise an AC/DC converter and a DC/DC converter, alternating current is converted to direct current by AC/DC converter wherein, DC/DC converter regulates direct voltage again, realizes the entirety charging to serial rechargeable battery pack or bank of super capacitors.
The parallel charging electronic circuit had in the multiple-channel output charging circuit of feedback equalization function described in the utility model comprises an AC/DC converter and an isolated multiple-channel output DC/DC converter, alternating current is converted to direct current by AC/DC converter wherein, and this direct current is converted to multi-channel DC output voltage by isolated multiple-channel output DC/DC converter again.The input of isolated multiple-channel output DC/DC converter, export between by transformer isolation, each road exports and takies the different winding of transformer, mutually insulated between winding.Each road of isolated multiple-channel output DC/DC converter exports and connects a battery cell charge management circuit, and each battery cell charge management circuit connects a battery cell.Parallel like this charging electronic circuit has just possessed the ability of arbitrary piece of battery cell being carried out to charge independence.
When connecting AC power to batteries charging, circuit is with serial charging electronic circuit for main charhing unit, and with parallel charging electronic circuit for supplemental charging unit charges, back electrical energy electronic circuit is stopped transport.For the battery pack that n battery cell is composed in series, serial charging electronic circuit accepts n times of ability of electrical power according to that battery cell that power capacity in battery pack is minimum, carry out serial charging to whole battery pack; Each road of parallel charging electronic circuit exports the battery cell charging circuit comprised, then according to the capacity difference of minimum that battery cell of power capacity in its that battery cell connected and battery pack (on the occasion of), corresponding electrical power is drawn, to that battery cell charging that it connects according to this difference.Such serial charging electronic circuit and parallel charging electronic circuit can work simultaneously, make each block battery can according to the ability of himself to accept electrical power.Under normal circumstances, when a manufacture battery pack, manufacturer's battery cell that always selectivity is consistent as far as possible comes in groups, so serial charging electronic circuit assume responsibility for main power delivery task, parallel charging electronic circuit assume responsibility for secondary power delivery task, is conducive to the miniaturization of parallel charging electronic circuit and reduces the wastage when realizing circuit.This charging modes, is differentiation charging, other battery cells will be caused not charge in full amount because the capacity of some battery cells is low, thus make the available capacity of whole battery pack equal its rated capacity concerning each battery cell.Again because serial charging electronic circuit and parallel charging electronic circuit can work simultaneously, make battery pack can accept electrical power with its maximum capacity, extra charging interval waste can not be caused, thus achieve quick charge.
In disconnection AC power, the placing of battery pack band electricity or long-term vacant electric discharge a period of time after, may can produce difference again between battery cell, cause the reason of this species diversity may be local temperature differences, solder joint failure, battery cell wound, circuit impedance inequality etc.When this differential accumulation to a certain extent time, back electrical energy electronic circuit puts into operation.Back electrical energy electronic circuit is an isolated DC/DC converter, and its input is the output of battery pack, and its output is the input of isolated multiple-channel output DC/DC converter in parallel charging electronic circuit.Back electrical energy electronic circuit takes out electric energy from integral battery door group, isolated multiple-channel output DC/DC converter is given energy transferring, isolated multiple-channel output DC/DC converter gives each battery cell power distribution in differentiation ground again, the battery cell few to energy storage supplements more energy, the battery cell many to energy storage supplements less energy or non-makeup energy, thus to achieve the electric energy of battery cells many for energy storage to the few battery cell transmission of energy storage generally, reach balanced object.This balancing energy process, can carry out while battery power discharge.This balancing energy process, had both been applicable to the equilibrium in battery pack, was also applicable to the equilibrium between each battery pack of being connected in parallel.
The utility model has the advantage of: (1) can realize charging to the differentiation of each battery cell, makes each battery cell in battery pack be filled to rated capacity; (2) can realize charging fast and efficiently to battery pack; (3) both can realize the electric quantity balancing of each battery cell in battery pack easily, also can realize the electric quantity balancing between battery pack easily.The multiple-channel output charging circuit with feedback equalization function of the present invention is applicable to the charging of the battery pack formed for being connected by multiple battery cell, and charging that is monomer series-connected by multiple ultracapacitor and the bank of super capacitors formed.
Accompanying drawing explanation
Fig. 1 is the multiple-channel output charging circuit schematic diagram with feedback equalization function of the present utility model;
Fig. 2 is the first implementation schematic diagram of isolated multiple-channel output DC/DC converter in Fig. 1 circuit;
Fig. 3 is the second implementation schematic diagram of isolated multiple-channel output DC/DC converter in Fig. 1 circuit;
Fig. 4 is the third implementation schematic diagram of isolated multiple-channel output DC/DC converter in Fig. 1 circuit;
Fig. 5 is the 4th kind of implementation schematic diagram of isolated multiple-channel output DC/DC converter in Fig. 1 circuit.
Specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
See Fig. 1, the structure with the multiple-channel output charging circuit of feedback equalization function of the present utility model as shown in Figure 1, battery cell 901, battery cell 902, battery cell 903 ..., battery cell 90n, n (n > 3) individual battery cell is by being composed in series battery pack altogether, namely the positive pole of battery pack is the positive pole of battery cell 901, and namely the negative pole of battery pack is the negative pole of battery cell 90n.
The multiple-channel output charging circuit with feedback equalization function comprises serial charging electronic circuit, parallel charging electronic circuit and back electrical energy electronic circuit.
Serial charging electronic circuit is made up of AC/DC converter 100, switch element 700, DC/DC converter 300, alternating current is from the input B1 of AC/DC converter 100 ~ and B2 ~ access, after over commutation, filtering, one group of high direct voltage Vcc1 is exported from output B3+ and B3-of AC/DC converter 100, the positive pole of Vcc1 meets B3+, and the negative pole of Vcc1 meets B3-.The input cathode C1-of B3-and DC/DC converter 300 is connected, and the input anode C1+ of B3+ and DC/DC converter 300 is connected through switch element 700.Like this, when needs carry out serial charging, switch element 700 closes, and the input voltage of DC/DC converter 300 is exactly Vcc1, and its output voltage Vcc2 sends from output C2+ and C2-of DC/DC converter 300, and wherein C2+ is positive pole, and C2-is negative pole.C2+ is connected with battery anode, and C2-is connected with battery electrode, and the magnitude of voltage of Vcc2 can regulate according to the demand of charging.The electric current formed by Vcc2 flows to the positive pole of battery cell 901 from C2+ end, again one by one through battery cell 902, battery cell 903, until battery cell 90n, flow back to C2-from the negative pole of battery cell 90n, thus achieve the serial of battery cell each in battery pack is charged.
Parallel charging electronic circuit is made up of AC/DC converter 200, switch element 600, isolated multiple-channel output DC/DC converter 500, alternating current is from the input A1 of AC/DC converter 200 ~ and A2 ~ access, after over commutation, filtering, one group of high direct voltage Vcc3 is exported from the output terminals A 3+ of AC/DC converter 200 and A3-, the positive pole of Vcc3 meets A3+, and the negative pole of Vcc3 meets A3-.A3-is connected with the input cathode E1-of isolated multiple-channel output DC/DC converter 500, and A3+ is connected through switch element 600 with the input anode E1+ of isolated multiple-channel output DC/DC converter 500.Like this, when needs carry out parallel charging, switch element 600 closes, and the input voltage of isolated multiple-channel output DC/DC converter 500 is exactly Vcc3.Inner at isolated multiple-channel output DC/DC converter 500, by transformer and PWM (pulse width modulation) circuit, Vcc3 is converted to the mutually isolated direct current of n group export Vo1, Vo2 ..., Von, often organize direct current output and connect a battery cell charging circuit, then receive respectively battery cell 901, battery cell 902 ..., battery cell 90n, each battery cell charging circuit can independent regulation.Like this, when needs carry out parallel charging, switch element 600 closes, and the input voltage of isolated multiple-channel output DC/DC converter 500 is exactly Vcc3, and n group that what it exported is can the direct voltage of independent regulation, and each group direct voltage is mutually isolated.Wherein, the positive pole F1+ of first group of direct voltage connects the positive pole of battery cell 901, and the negative pole F1-of first group of direct voltage connects the negative pole of battery cell 901; The positive pole F2+ of second group of direct voltage connects the positive pole of battery cell 902, and the negative pole F2-of second group of direct voltage connects the negative pole of battery cell 902; The positive pole Fn+ of n-th group of direct voltage connects the positive pole of battery cell 90n, and the negative pole Fn-of n-th group of direct voltage connects the negative pole of battery cell 90n.So, just can realize charging to the differentiation of any one battery cell in battery pack.
Serial charging electronic circuit and the associated working of parallel charging electronic circuit, charge to battery pack.If each battery cell is respectively from battery cell 901 to the ability of the accepted charged electrical power of battery cell 90n in battery pack:
x
1，x
2，…，x
n
Minimum value is wherein x
min=min (x
1, x
2..., x
n)
Order:
Δx
1＝x
1-x
min
Δx
2＝x
2-x
min
Δx
n＝x
n-x
min
Then serial charging electronic circuit is according to n x doubly
minelectrical power is charged to battery pack entirety, and parallel charging electronic circuit is then according to electrical power Δ x
1, Δ x
2..., Δ x
nrespectively to battery cell 901, battery cell 902 ..., battery cell 90n charges.The ability that so every block battery all can accept charged electrical power according to it is charged, and both can ensure that each battery cell can be charged to rated capacity, can ensure that again charging rate is fast.
In disconnection AC power, the placing of battery pack band electricity or long-term vacant electric discharge a period of time after, may can produce difference again between battery cell, cause the reason of this species diversity may be local temperature differences, solder joint failure, battery cell wound, circuit impedance inequality etc.When this differential accumulation to a certain extent time, back electrical energy electronic circuit puts into operation.Back electrical energy electronic circuit comprises an isolated DC/DC converter 400 and a switch element 800, and its input is the output of battery pack, and its output is the input of isolated multiple-channel output DC/DC converter 500 in parallel charging electronic circuit.The input positive pole D2+ of isolated DC/DC converter 400 is connected with battery anode, and the input negative pole D2-of isolated DC/DC converter 400 is connected with battery electrode; The output cathode D1+ of isolated DC/DC converter 400 is connected with the input positive pole of isolated multiple-channel output DC/DC converter 500, and the output negative pole D1-of isolated DC/DC converter 400 is connected with the input negative pole of isolated multiple-channel output DC/DC converter 500.After switch element 800 is closed, back electrical energy electronic circuit puts into operation.Back electrical energy electronic circuit takes out electric energy from integral battery door group, isolated multiple-channel output DC/DC converter 500 is given energy transferring, isolated multiple-channel output DC/DC converter 500 gives each battery cell power distribution in differentiation ground again, the battery cell few to energy storage supplements more energy, the battery cell many to energy storage supplements less energy or non-makeup energy, thus to achieve the electric energy of battery cells many for energy storage to the few battery cell transmission of energy storage generally, reach balanced object.This balancing energy process, can carry out while battery power discharge.This balancing energy process, had both been applicable to the equilibrium of each battery cell in battery pack, was also applicable to the equilibrium between multiple battery pack of being connected in parallel.
Isolated multiple-channel output DC/DC converter in charged in parallel electronic circuit can have multiple way of realization, and its first way of realization is see Fig. 2.In Fig. 2, isolated multiple-channel output DC/DC converter is combined by multiple DC/DC converter and battery cell charging circuit, wherein the 1st DC/DC converter comprises PWM controller 510, transformer 5100, secondary side rectification circuit 511, secondary side filter inductance 5110, secondary side filter capacitor 5111 form, the input of battery cell charging circuit 5112 is received in the output of this DC/DC converter, and the output of battery cell charging circuit 5112 is gone to a battery cell charging.Similar, 2nd DC/DC converter comprises PWM controller 520, transformer 5200, secondary side rectification circuit 521, secondary side filter inductance 5210, secondary side filter capacitor 5211 form, the input of battery cell charging circuit 5212 is received in the output of this DC/DC converter, and the output of battery cell charging circuit 5212 is gone to a battery cell charging; N-th DC/DC converter comprises PWM controller 5n0, transformer 5n00, secondary side rectification circuit 5n1, secondary side filter inductance 5n10, secondary side filter capacitor 5n11 form, the input of battery cell charging circuit 5n12 is received in the output of this DC/DC converter, and the output of battery cell charging circuit 5n12 is gone to a battery cell charging.The feature of the first way of realization is: inner each DC/DC converter has the transformer had alone, and transformer is one group of input and one group of output.The occasion that this circuit is suitable for heavier loads uses.
The second way of realization of isolated multiple-channel output DC/DC converter is see Fig. 3.In Fig. 3, isolated multiple-channel output DC/DC converter only has a pwm control circuit, and only comprises 1 transformer, and this transformer primary side has a winding, and secondary side has n (n > 2) individual winding.Direct current input forms n road and exports after PWM controller 510 and transformer 5100, wherein the 1st tunnel exports and connects secondary side rectification circuit 511, form one group of secondary side direct current by the effect of secondary side filter inductance 5110, secondary side filter capacitor 5111 again to export, receive the input of battery cell charging circuit 5112 again, the output of battery cell charging circuit 5112 is gone to a battery cell charging.Similar, 2nd tunnel exports and connects secondary side rectification circuit 512, form one group of secondary side direct current by the effect of secondary side filter inductance 5120, secondary side filter capacitor 5121 again to export, receive the input of battery cell charging circuit 5122 again, the output of battery cell charging circuit 5122 is gone to a battery cell charging; N-th tunnel exports and meets secondary side rectification circuit 51n, form one group of secondary side direct current by the effect of secondary side filter inductance 51n0, secondary side filter capacitor 51n1 again to export, receive the input of battery cell charging circuit 51n2 again, the output of battery cell charging circuit 51n2 is gone to a battery cell charging.The feature of the second way of realization is: inside only has a pwm control circuit and a transformer, and transformer is one group of input and organizes output more.This circuit is suitable for the lighter occasion of load and uses, and can reduce the quantity of components and parts, be conducive to reducing costs.
The third way of realization of isolated multiple-channel output DC/DC converter is see Fig. 4, and this form is the distortion of the first way of realization of aforementioned isolated multiple-channel output DC/DC converter.In Fig. 4, isolated multiple-channel output DC/DC converter is combined by multiple DC/DC converter and battery cell charging circuit, and wherein some DC/DC converter is input one output, and some is an input multi output.In Fig. 4 510,520,52n is pwm control circuit, 5100,5200,52n0 is transformer, 511,512,51m, 521,52n is secondary side rectification circuit, 5110,5120,51m0,5210,52n0 is secondary side filter inductance, 5111,5121,51m1,5211,52n1 is filter capacitor, 5112,5122,51m2,5212,52n2 is battery cell charging circuit.The feature of the third way of realization is: inner each DC/DC converter has and has alone
Transformer, wherein the transformer of some DC/DC converter is input one output, and some is an input multi output.This circuit can be applicable to the battery pack that plurality of voltages exports.
4th kind of way of realization of isolated multiple-channel output DC/DC converter is see Fig. 5, and this form is the distortion of the second way of realization of aforementioned isolated multiple-channel output DC/DC converter.In Fig. 5, isolated multiple-channel output DC/DC converter only has a pwm control circuit, and comprises multiple transformer, and these transformers are input one output a bit, and some is an input multi output.In Fig. 5,510 is pwm control circuits, 5100,5200,52n0 is transformer, 511,512,51m, 521,52n is secondary side rectification circuit, 5110,5120,51m0,5210,52n0 is secondary side filter inductance, 5111,5121,51m1,5211,52n1 is filter capacitor, 5112,5122,51m2,5212,52n2 is battery cell charging circuit.The feature of the 4th kind of way of realization is: inside only has a pwm control circuit, and has multiple transformer, and wherein some transformer is input one output, and some is an input multi output.This circuit is suitable for plurality of voltages and exports, and multiple-channel output institute bringing onto load difference is not the use of king-sized battery pack.
Claims (3)
1. one kind has the multiple-channel output charging circuit of feedback equalization function, it is characterized in that: this circuit comprises serial charging electronic circuit, parallel charging electronic circuit and back electrical energy electronic circuit, and wherein serial charging electronic circuit carries out overall serial connection charge for series battery; Parallel charging electronic circuit exports the 3 above DC power supply in road, and each DC power supply connects a battery cell charging circuit, charges, be isolated from each other between these DC power supply by transformer coil for a battery cell, does not have direct circuit to connect; The input positive pole of back electrical energy electronic circuit connects the positive pole of series battery, the input negative pole of back electrical energy electronic circuit connects the negative pole of series battery, namely the electric energy of battery pack is passed through isolated DC/DC by back electrical energy electronic circuit: DC to DC converter, feeds back to parallel charging electronic circuit.
2. the multiple-channel output charging circuit with feedback equalization function according to claim 1, it is characterized in that: serial charging electronic circuit, parallel charging electronic circuit and back electrical energy electronic circuit, these three sub-inside circuits all contain electronic switch, can switch on and off according to charging strategy.
3. the multiple-channel output charging circuit with feedback equalization function according to claim 1, it is characterized in that: namely parallel charging electronic circuit comprises AC/DC: AC-dc converter and isolated multiple-channel output DC/DC converter, isolated multiple-channel output DC/DC converter inside wherein uses transformer to be kept apart by the primary and secondary of DC/DC converter, is also kept apart by different transformer secondary output windings between secondary multiple-channel output.
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| CN201520475523.1U CN204809925U (en) | 2015-06-26 | 2015-06-26 | Multiplexed output charging circuit with feed back balanced function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967167A (en) * | 2015-06-26 | 2015-10-07 | 咸阳华清设备科技有限公司 | Multi-channel output charging circuit with feedback equalization function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967167A (en) * | 2015-06-26 | 2015-10-07 | 咸阳华清设备科技有限公司 | Multi-channel output charging circuit with feedback equalization function |
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