CN103904754A - DC/DC convertor circuit for bi-directional modular high-power battery equalization - Google Patents
DC/DC convertor circuit for bi-directional modular high-power battery equalization Download PDFInfo
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Abstract
The invention discloses a DC/DC convertor circuit for bi-directional modular high-power battery equalization. The DC/DC convertor circuit comprises a series battery pack, a MCU controller and a DC/DC convertor. The DC/DC convertor comprises n equalization units which correspond to n battery cells in a one-to-one mode. Each equalization unit comprises a first equalization circuit, an equalization transformer and a second equalization circuit. By the adoption of the DC/DC convertor circuit, high-power bi-directional active equalization is achieved, for the battery cells, with unequal electric quantity, in the series batter pack, excessive electricity of the battery cells is taken, and supplemental electricity is provided for the battery cells with insufficient electricity; in the charging process, energy of the excessively saturated battery cells is transferred to the whole battery pack; in the discharging process, the energy of the series battery pack is transferred to the battery cells with insufficient electricity; in this way, all the battery cells can be rapidly kept good in consistency in the charging and discharging processes.
Description
Technical field
The present invention relates to battery management technical field, more particularly, relate to the balanced DC/DC converter circuit of using of a kind of bidirectional modularized high power battery.
Background technology
In use easily there is performance difference in lithium battery, thereby has influence on the service condition of series battery entirety, even occurs that battery too charges, too electric discharge, the problems such as the serious heating of inside battery when serious, and the performance of series battery is determined by the poorest joint cell of its performance, in the time that dwindling, a certain joint cell capacity can cause the actual capacity of series battery also and then to dwindle, for addressing the above problem, general way is to adopt the mode of active equalization to carry out equilibrium, and in prior art the active equalization technology of main flow taking charge balancing as main, i.e. only equilibrium in battery charging, in electric discharge, ignore, and euqalizing current is not generally very large, cannot solve so the various impacts that otherness that battery occurs in electric discharge time is brought, can not improve further portfolio effect and the inconsistency of improving battery, balancing speed and balanced operation scope are severely limited, therefore, be necessary existing balancing technique do further research and improve.
Summary of the invention
The object of the invention is the problem of mentioning in above-mentioned background technology in order to solve, provide a kind of bidirectional modularized high power battery the balanced DC/DC converter circuit of using, realize great power bidirectional active equalization, the inconsistent cell of electric weight in series battery is carried out getting few benefit more, in the process of charging, the energy of too saturated cell is transferred to whole series battery, the energy of series battery is transferred to electric weight cell not fully in the process of electric discharge, under charge status, can both make rapidly like this each cell keep good consistency.
To achieve these goals, technical scheme of the present invention is as follows:
The balanced DC/DC converter circuit of using of bidirectional modularized high power battery, comprise series battery to be discharged and recharged, MCU controller, and DC/DC converter, described series battery is in series by n joint cell, be respectively battery 1, battery 2, battery n, described DC/DC converter comprises that n is saved cell balanced unit one to one with described n, a described n balanced unit includes the first equalizing circuit, equalizer transformer, and second equalizing circuit, the former limit of a described n equalizer transformer is connected in parallel with n joint cell respectively, secondary is connected with the positive and negative terminal of series battery respectively, described the first equalizing circuit receives the PWMA control signal from MCU controller, be attempted by between the node and the former limit input of equalizer transformer between cell, described the second equalizing circuit receives the PWMB control signal from MCU controller, be attempted by between the negative terminal of series battery and the secondary input of equalizer transformer.
Further, described the first equalizing circuit comprises resistance R 1, capacitor C 1, NPN type triode Q1, positive-negative-positive triode Q2, resistance R 2, resistance R 3 and metal-oxide-semiconductor M1, and described the second equalizing circuit comprises resistance R 4, NPN type triode Q3, positive-negative-positive triode Q4, resistance R 5, resistance R 6 and metal-oxide-semiconductor M2.
Further, described PMMA control signal is connected in series resistance R 1 successively, capacitor C 1, the first power amplified drive circuit, resistance R 2, and the grid of metal-oxide-semiconductor M1, the source electrode of described metal-oxide-semiconductor M1 is connected on the Nodes between cell, drain electrode is connected on the former limit input of equalizer transformer, described resistance R 3 one ends are connected between resistance R 2 and the grid of metal-oxide-semiconductor M1, the other end is connected on the Nodes between cell, described the first power amplified drive circuit is made up of NPN type triode Q1 and positive-negative-positive triode Q2, the base stage of described NPN type triode Q1 is connected the input as the first power amplified drive circuit with the base stage of described positive-negative-positive triode Q2, the emitter of described NPN type triode Q1 is connected the output as the first power amplified drive circuit with the emitter of described positive-negative-positive triode Q2, the collector electrode of described NPN type triode Q1 is connected with power supply, node between collector electrode and the cell of described positive-negative-positive triode Q2 is connected.
Further, described PMMB control signal is connected in series resistance R 4 successively, the second power amplified drive circuit, resistance R 5, and the grid of metal-oxide-semiconductor M2, the source electrode of described metal-oxide-semiconductor M2 is connected on the negative terminal of series battery, drain electrode is connected on the secondary input of equalizer transformer, described resistance R 6 one ends are connected between resistance R 5 and the grid of metal-oxide-semiconductor M2, the negative terminal of another termination series battery, described the second power amplified drive circuit is made up of NPN type triode Q3 and positive-negative-positive triode Q4, the base stage of described NPN type triode Q3 is connected the input as the second power amplified drive circuit with the base stage of described positive-negative-positive triode Q4, the emitter of described NPN type triode Q3 is connected the output as the second power amplified drive circuit with the emitter of described positive-negative-positive triode Q4, the collector electrode of described NPN type triode Q3 is connected with power supply, the collector electrode of described positive-negative-positive triode Q4 is connected with the negative terminal of series battery.
Further, described the first power amplified drive circuit and the second power amplified drive circuit all adopt isolated form push-pull circuit.
Further, between two secondary inputs of described equalizer transformer, be also provided with freewheeling circuit, described freewheeling circuit is formed by resistance R 7 and sustained diode 1 serial connection, and described sustained diode 1 reversal connection is in circuit.
Further, in described MCU controller, be provided with PWMA modulating pulse output module and PWMB modulating pulse output module.
Compared with prior art, beneficial effect of the present invention is as follows: bidirectional modularized high power battery equilibrium provided by the invention has realized great power bidirectional active equalization with DC/DC converter circuit, the inconsistent cell of electric weight in series battery is carried out getting few benefit more, in the process of charging, the energy of too saturated cell is transferred to whole series battery, the energy of series battery is transferred to electric weight cell not fully in the process of electric discharge, under charge status, can both be made rapidly like this each cell keep good consistency.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is electrical block diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In conjunction with the balanced DC/DC converter circuit of using of the bidirectional modularized high power battery shown in Fig. 1, comprise series battery to be discharged and recharged, MCU controller, and DC/DC converter, series battery is in series by n joint cell, be respectively battery 1, battery 2, battery n, DC/DC converter comprises that n is saved cell balanced unit one to one with n, n balanced unit includes the first equalizing circuit, equalizer transformer, and second equalizing circuit, n the former limit of equalizer transformer is connected in parallel with n joint cell respectively, secondary is connected with the positive and negative terminal of series battery respectively, the first equalizing circuit receives the PWMA control signal from MCU controller, be attempted by between the node and the former limit input of equalizer transformer between cell, the second equalizing circuit receives the PWMB control signal from MCU controller, be attempted by between the negative terminal of series battery and the secondary input of equalizer transformer.
In the present embodiment, the first equalizing circuit comprises resistance R 1, capacitor C 1, NPN type triode Q1, positive-negative-positive triode Q2, resistance R 2, resistance R 3 and metal-oxide-semiconductor M1, and the second equalizing circuit comprises resistance R 4, NPN type triode Q3, positive-negative-positive triode Q4, resistance R 5, resistance R 6 and metal-oxide-semiconductor M2.
In the present embodiment, PMMA control signal is connected in series resistance R 1 successively, capacitor C 1, the first power amplified drive circuit, resistance R 2, and the grid of metal-oxide-semiconductor M1, the source electrode of metal-oxide-semiconductor M1 is connected on the Nodes between cell, drain electrode is connected on the former limit input of equalizer transformer, resistance R 3 one ends are connected between resistance R 2 and the grid of metal-oxide-semiconductor M1, the other end is connected on the Nodes between cell, the first power amplified drive circuit is made up of NPN type triode Q1 and positive-negative-positive triode Q2, the base stage of NPN type triode Q1 is connected the input as the first power amplified drive circuit with the base stage of positive-negative-positive triode Q2, the emitter of NPN type triode Q1 is connected the output as the first power amplified drive circuit with the emitter of positive-negative-positive triode Q2, the collector electrode of NPN type triode Q1 is connected with power supply, node between collector electrode and the cell of positive-negative-positive triode Q2 is connected.
In the present embodiment, PMMB control signal is connected in series resistance R 4 successively, the second power amplified drive circuit, resistance R 5, and the grid of metal-oxide-semiconductor M2, the source electrode of metal-oxide-semiconductor M2 is connected on the negative terminal of series battery, drain electrode is connected on the secondary input of equalizer transformer, resistance R 6 one ends are connected between resistance R 5 and the grid of metal-oxide-semiconductor M2, the negative terminal of another termination series battery, the second power amplified drive circuit is made up of NPN type triode Q3 and positive-negative-positive triode Q4, the base stage of NPN type triode Q3 is connected the input as the second power amplified drive circuit with the base stage of positive-negative-positive triode Q4, the emitter of NPN type triode Q3 is connected the output as the second power amplified drive circuit with the emitter of positive-negative-positive triode Q4, the collector electrode of NPN type triode Q3 is connected with power supply, the collector electrode of positive-negative-positive triode Q4 is connected with the negative terminal of series battery.
In the present embodiment, the first power amplified drive circuit and the second power amplified drive circuit all adopt isolated form push-pull circuit.
In the present embodiment, between two secondary inputs of equalizer transformer, be also provided with freewheeling circuit, freewheeling circuit is formed by resistance R 7 and sustained diode 1 serial connection, and sustained diode 1 reversal connection is in circuit.
In the present embodiment, in MCU controller, be provided with PWMA modulating pulse output module and PWMB modulating pulse output module.
The present invention exports PWMA control signal and the PWMB control signal of positive negative level by MCU controller, PWMA control signal is through being delivered to the first power amplified drive circuit after resistance R 1 and capacitor C 1, the first power amplified drive circuit is processed this signal, expand driving force, through current-limiting resistance R2 rear drive metal-oxide-semiconductor M1, PWMB control signal is through being delivered to the second power amplified drive circuit after resistance R 4, the second power amplified drive circuit is processed this signal, expand driving force, through current-limiting resistance R5 rear drive metal-oxide-semiconductor M2, thereby control the conducting of metal-oxide-semiconductor M1 and M2 and close.
In the present invention, the conducting of MCU controller by its inner PWMA modulating pulse output module and PWMB modulating pulse output module control metal-oxide-semiconductor and closing, thus control the size of euqalizing current.
The present invention is that the principle based on transformer realizes the equilibrium to battery, realize energy by equalizer transformer shifts between cell and series battery, in this circuit, every joint cell two ends all pick out equilibrium line, PACK+ and PACK-are total positive pole and total negative poles of series battery, the former edge joint of equalizer transformer cell, and secondary is connected on PACK+ and PACK-, and former limit and secondary loop are all controlled by metal-oxide-semiconductor.When finding in the process of battery charging, a certain cell is if the voltage of battery 1 is apparently higher than the voltage of other cells in series battery, and exceed the threshold range of regulation, the energy of battery 1 is too saturated with respect to other batteries, now MCU controller output PWM1A and PWM1B signal, after expanding driving force through push-pull circuit, promote the metal-oxide-semiconductor conducting of rear end and close, control like this conducting of the former limit of equalizer transformer and secondary and close, and then control energy output to secondary from former limit, be finally delivered to series battery; Same, in discharge process, find that the voltage of battery 1 is starkly lower than the voltage of other cells in series battery, and exceed the threshold range of regulation, battery 1 is put with respect to the obvious mistake of other batteries, MCU controller provides pwm control signal equally, allows energy be delivered to former limit from equalizer transformer secondary, and energy is delivered to cell from series battery, realize like this bi-directional of energy, realized charge balancing and equalization discharge to battery.Wherein, the Time dependent of metal-oxide-semiconductor conducting the size of euqalizing current, MCU controller can be controlled frequency and the duty ratio of pwm signal by program, and then controls the working condition of metal-oxide-semiconductor, has so just realized the control to euqalizing current size.
In whole circuit, the max-thresholds of euqalizing current is only limited by the electric parameter of metal-oxide-semiconductor and equalizer transformer and heat radiation situation of circuit etc.
The present invention carries out bilateral control to equalizer transformer, realize the object of bidirectional equalization, utilize pwm signal control push-pull circuit to expand driving force, driven MOS pipe, realize high-power active equalization, in battery charging and discharging, can both provide effective guarantee, larger euqalizing current is provided, promote balanced speed, can repair rapidly the difference between battery.
The present invention is used to the series battery that contains at least two cells to carry out equilibrium; comprise the series battery of at least two cells; in balancing procedure; make the electric weight trend of each battery consistent; realizing electric weight shifts; realize the dynamic equilibrium of electric weight in dynamic process; avoid overcharging and overdischarge phenomenon; protection battery pack; increase the service life, the energy content of battery makes full use of, and energy content of battery utilance is high; and greatly improved balancing speed and portfolio effect, the present invention is applied in the battery that capacity is larger can reach balanced object rapidly.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. the balanced DC/DC converter circuit of using of bidirectional modularized high power battery, it is characterized in that, comprise series battery to be discharged and recharged, MCU controller, and DC/DC converter, described series battery is in series by n joint cell, be respectively battery 1, battery 2, battery n, described DC/DC converter comprises that n is saved cell balanced unit one to one with described n, a described n balanced unit includes the first equalizing circuit, equalizer transformer, and second equalizing circuit, the former limit of a described n equalizer transformer is connected in parallel with n joint cell respectively, secondary is connected with the positive and negative terminal of series battery respectively, described the first equalizing circuit receives the PWMA control signal from MCU controller, be attempted by between the node and the former limit input of equalizer transformer between cell, described the second equalizing circuit receives the PWMB control signal from MCU controller, be attempted by between the negative terminal of series battery and the secondary input of equalizer transformer.
2. the balanced DC/DC converter circuit of using of bidirectional modularized high power battery as claimed in claim 1, it is characterized in that, described the first equalizing circuit comprises resistance R 1, capacitor C 1, NPN type triode Q1, positive-negative-positive triode Q2, resistance R 2, resistance R 3 and metal-oxide-semiconductor M1, and described the second equalizing circuit comprises resistance R 4, NPN type triode Q3, positive-negative-positive triode Q4, resistance R 5, resistance R 6 and metal-oxide-semiconductor M2.
3. the balanced DC/DC converter circuit of using of bidirectional modularized high power battery as claimed in claim 2, it is characterized in that, described PMMA control signal is connected in series resistance R 1 successively, capacitor C 1, the first power amplified drive circuit, resistance R 2, and the grid of metal-oxide-semiconductor M1, the source electrode of described metal-oxide-semiconductor M1 is connected on the Nodes between cell, drain electrode is connected on the former limit input of equalizer transformer, described resistance R 3 one ends are connected between resistance R 2 and the grid of metal-oxide-semiconductor M1, the other end is connected on the Nodes between cell, described the first power amplified drive circuit is made up of NPN type triode Q1 and positive-negative-positive triode Q2, the base stage of described NPN type triode Q1 is connected the input as the first power amplified drive circuit with the base stage of described positive-negative-positive triode Q2, the emitter of described NPN type triode Q1 is connected the output as the first power amplified drive circuit with the emitter of described positive-negative-positive triode Q2, the collector electrode of described NPN type triode Q1 is connected with power supply, node between collector electrode and the cell of described positive-negative-positive triode Q2 is connected.
4. the balanced DC/DC converter circuit of using of bidirectional modularized high power battery as claimed in claim 3, it is characterized in that, described PMMB control signal is connected in series resistance R 4 successively, the second power amplified drive circuit, resistance R 5, and the grid of metal-oxide-semiconductor M2, the source electrode of described metal-oxide-semiconductor M2 is connected on the negative terminal of series battery, drain electrode is connected on the secondary input of equalizer transformer, described resistance R 6 one ends are connected between resistance R 5 and the grid of metal-oxide-semiconductor M2, the negative terminal of another termination series battery, described the second power amplified drive circuit is made up of NPN type triode Q3 and positive-negative-positive triode Q4, the base stage of described NPN type triode Q3 is connected the input as the second power amplified drive circuit with the base stage of described positive-negative-positive triode Q4, the emitter of described NPN type triode Q3 is connected the output as the second power amplified drive circuit with the emitter of described positive-negative-positive triode Q4, the collector electrode of described NPN type triode Q3 is connected with power supply, the collector electrode of described positive-negative-positive triode Q4 is connected with the negative terminal of series battery.
5. bidirectional modularized high power battery as claimed in claim 4 is balanced uses DC/DC converter circuit, it is characterized in that, described the first power amplified drive circuit and the second power amplified drive circuit all adopt isolated form push-pull circuit.
6. the balanced DC/DC converter circuit of using of bidirectional modularized high power battery as claimed in claim 1, it is characterized in that, between two secondary inputs of described equalizer transformer, be also provided with freewheeling circuit, described freewheeling circuit is formed by resistance R 7 and sustained diode 1 serial connection, and described sustained diode 1 reversal connection is in circuit.
7. bidirectional modularized high power battery as claimed in claim 1 is balanced uses DC/DC converter circuit, it is characterized in that, is provided with PWMA modulating pulse output module and PWMB modulating pulse output module in described MCU controller.
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| CN105609885A (en) * | 2015-12-30 | 2016-05-25 | 深圳市思格纳斯科技有限公司 | Control method and control circuit for constant-current equalization of power batteries |
| CN107733241A (en) * | 2017-11-14 | 2018-02-23 | 深圳睿舍智能科技有限公司 | Double primary side insulating power supplies |
| CN108054807A (en) * | 2018-01-18 | 2018-05-18 | 杭州电子科技大学 | A kind of master passively combines buck battery equalizing circuit |
| CN108134428A (en) * | 2018-01-18 | 2018-06-08 | 杭州电子科技大学 | A kind of master passively combines booster battery equalizing circuit |
| CN108134429A (en) * | 2018-01-18 | 2018-06-08 | 杭州电子科技大学 | A kind of master passively mixes decompression equalizing circuit |
| CN109742459A (en) * | 2018-12-20 | 2019-05-10 | 中国电子科技集团公司第四十八研究所 | A kind of lithium battery management system of unmanned plane quick charge |
| CN111342152A (en) * | 2020-03-06 | 2020-06-26 | 温州大学 | Composite battery pack equalization circuit |
| CN112186852A (en) * | 2020-09-30 | 2021-01-05 | 宁波新舜信息科技有限公司 | Marine BMS passive equalization control circuit |
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| CN112186852A (en) * | 2020-09-30 | 2021-01-05 | 宁波新舜信息科技有限公司 | Marine BMS passive equalization control circuit |
| CN112186852B (en) * | 2020-09-30 | 2022-07-26 | 宁波新舜信息科技有限公司 | Marine BMS passive equalization control circuit |
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Application publication date: 20140702 |