CN104201743B - A kind of battery equalizing circuit and control method thereof - Google Patents
A kind of battery equalizing circuit and control method thereof Download PDFInfo
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- CN104201743B CN104201743B CN201410458737.8A CN201410458737A CN104201743B CN 104201743 B CN104201743 B CN 104201743B CN 201410458737 A CN201410458737 A CN 201410458737A CN 104201743 B CN104201743 B CN 104201743B
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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
Abstract
The invention discloses a kind of battery equalizing circuit and control method thereof, this battery equalizing circuit comprises the first equalizing circuit, for giving the second equalizing circuit by the charge transport of charging circuit and battery pack; Second equalizing circuit, passes to connected battery for the electricity the first equalizing circuit transmission come; Continuous current circuit, after disconnecting for the first equalizing circuit, the electric current of inductance in afterflow second freewheeling circuit; First sample circuit, for ceaselessly gathering the current voltage of connected battery; Timer, gives the first equalizing circuit signal for timing, makes the first equalizing circuit periodically break-make; First equalizing circuit is in parallel with battery pack; Each first sample circuit is connected with a battery respectively; Each second equalizing circuit respectively with a cell parallel behind the two ends of a battery, be electrically connected with the first equalizing circuit; Each continuous current circuit is connected with the second equalizing circuit linked together and battery respectively; Timer and the first equalizing circuit are electrically connected.
Description
Technical field
The present invention relates to battery protection system, be specifically related to a kind of battery equalizing circuit and control method thereof.
Background technology
For the battery pack including multiple battery; every cell degradation speed is different, temperature is different, charge/discharge capacity is uneven; some battery unit in series battery usually can be caused not mate with other battery cell capacity, and then cause the capacity mismatch of whole battery pack.During charging, other series-connected cell unit are not also full of, and aging fast battery unit is full of.During electric discharge, other battery units also do not discharge, and aging fast battery discharges, and form wooden pail effect, restrict the performance of whole battery pack.If allow battery system run in this case and not managed, the useful life of battery and the capacity of system all can be affected.In order to extend the useful life of battery pack, all battery cells must be made all to remain on same depth of discharge.
Current existing active equalization technology often adopts, and when some battery unit electricity is not enough in battery pack, shifts the battery unit of energy to electricity deficiency by inductance or electric capacity from the unit that electricity is many.
As in Fig. 1, suppose that battery unit Z1 voltage is higher than battery unit Z2, by closed S11 and S21, electric capacity C1 is charged to voltage Z1, disconnect S11, S21 close S12 and S22 then capacitance voltage higher than battery unit Z2 voltage, therefore electric capacity C1 discharges to Z2, discharge electricity amount is directly proportional to pressure reduction between battery unit Z1, Z2.Because pressure reduction between battery unit is very little, therefore transfer velocity is very slow, and requirement of real-time when cannot meet heavy-current discharge, electric charge can only shift between adjacent battery unit simultaneously, reduces transfer efficiency.
As shown in Figure 2, the switch of another one equalizing circuit generally all adopts semiconductor MOS FET or relay switch, such as, in Fig. 1, Fig. 2, switch S is all generally that MOSFET or relay are taken on, the subject matter of relay is that switching speed is too slow, general at about 5ms, make electricity transfer velocity slow, and MOSFET needs drive circuit, drive circuit just needs the voltage of a 7 ~ 10V higher than institute driven MOS FET source S, if this voltage from battery unit power taking, both added complexity by converter, also reduced efficiency.Along with battery pack series connection joint number increases, problem is more outstanding, also there is the problem that energy can only transmit between adjacent cells in this circuit in addition, when non-conterminous battery cell capacity mismatch, need repeatedly to transmit, the low battery of capacity could be delivered to from the battery that capacity is high, reduce transmission efficiency.
Summary of the invention
For above-mentioned deficiency of the prior art, electricity can be delivered to the low battery of voltage from the battery that voltage is high when discharging by battery equalizing circuit provided by the invention and control method rapidly thereof, realize the equilibrium of each battery discharge in battery pack, during charging, ensure that every battery unit is full of by equalizing circuit.
In order to reach foregoing invention object, one embodiment of the invention provides a kind of battery equalizing circuit, its multiple batteries for being connected in series in balancing battery group, battery equalizing circuit comprises the first equalizing circuit, for giving the second equalizing circuit by the charge transport of charging circuit and battery pack.Some second equalizing circuits, pass to connected battery for the electricity the first equalizing circuit transmission come.
Some continuous current circuits, after disconnecting for the first equalizing circuit, the electric current of inductance in afterflow second freewheeling circuit.Some first sample circuits, for ceaselessly gathering the current voltage of connected battery.Timer, gives described first equalizing circuit signal for timing, makes the first equalizing circuit periodically break-make.Some battery protecting circuits, for battery charging process battery reach capacity voltage time and/or battery discharge procedure battery current voltage be more than or equal to battery pack current average voltage time forbid that the electricity of the first equalizing circuit is passed to the second equalizing circuit.
First equalizing circuit is in parallel with battery pack; Each first sample circuit is connected with a battery respectively; Each second equalizing circuit respectively with a cell parallel after, be electrically connected with the first equalizing circuit; Each continuous current circuit is connected with the second equalizing circuit linked together and battery respectively; Battery protecting circuit is connected between battery and the second equalizing circuit; Timer and the first equalizing circuit are electrically connected.
Another embodiment of the present invention provides a kind of battery equalizing circuit control method, comprises the following steps:
Judge the current status of battery pack;
When battery pack is in charged state, obtain the current voltage of each battery;
When there being the current voltage of a battery to reach capacity voltage in battery pack, cut off the charge circuit of battery pack and power supply circuits, conducting first equalizing circuit and the second equalizing circuit, make the first equalizing circuit and power supply circuits form loop simultaneously;
Control the first equalizing circuit with fixed duty cycle break-make, electricity is passed to the battery charging that the second equalizing circuit does not reach capacity to current voltage in battery pack;
When battery pack is in discharge condition, obtain the current voltage of each battery, and calculate the current average voltage of all batteries;
Calculate the difference between the current voltage of battery and current average voltage;
When difference is greater than the threshold values preset, conducting first equalizing circuit and the second equalizing circuit, make the first equalizing circuit and power supply circuits form loop simultaneously;
Control the first equalizing circuit with fixed duty cycle break-make, electricity is passed to the second equalizing circuit and be greater than the battery charging presetting threshold values to difference in battery pack.
Beneficial effect of the present invention is: in battery power discharge process, when partial cell voltage height is inconsistent, rapidly electricity can be delivered to the low battery of voltage from the battery that voltage is high by battery equalizing circuit of the present invention and control method thereof, realize the equilibrium of each battery discharge in battery pack, extend the useful life of battery pack.
In batteries charging process, after one of them battery is filled with, battery equalizing circuit of the present invention and control method thereof can control the charge circuit that battery pack and charging circuit form and disconnect, the loop that the former limit of closed conducting transformer, the first switch and charging circuit are formed, to unsaturated battery charging, avoids percentage of batteries and occurs overcharging and affecting battery life.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a battery equalizing circuit embodiment in prior art;
Fig. 2 is the circuit diagram of another embodiment of battery equalizing circuit in prior art;
Fig. 3 is the circuit diagram of a battery equalizing circuit of the present invention embodiment;
Fig. 4 is the flow chart of a control method embodiment of battery equalizing circuit of the present invention.
Embodiment
Below the specific embodiment of the present invention is described; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present invention determined, these changes are apparent, and all innovation and creation utilizing the present invention to conceive are all at the row of protection in appended claim.
Battery equalizing circuit provided by the invention is used for the multiple batteries be connected in series in balancing battery group, and the technical scheme of a battery equalizing circuit embodiment comprises the first equalizing circuit, for giving the second equalizing circuit by the charge transport of charging circuit and battery pack; Some second equalizing circuits, pass to connected battery for the electricity the first equalizing circuit transmission come; Some continuous current circuits, after disconnecting for the first equalizing circuit, the electric current of inductance in afterflow second freewheeling circuit.Some first sample circuits, for ceaselessly gathering the current voltage of connected battery.
Timer, gives the first equalizing circuit signal for timing, makes the first equalizing circuit periodically break-make; First equalizing circuit is in parallel with battery pack; Each first sample circuit is connected with a battery respectively; Each second equalizing circuit respectively with a cell parallel after, be electrically connected with the first equalizing circuit; Each continuous current circuit is connected with the second equalizing circuit linked together and battery respectively; Timer and the first equalizing circuit are electrically connected.
In one embodiment of the invention, battery equalizing circuit can also comprise battery protecting circuit, for battery charging process battery reach capacity voltage time and/or battery discharge procedure battery current voltage be more than or equal to battery pack current average voltage time forbid that the electricity of the first equalizing circuit is passed to the second equalizing circuit; Battery protecting circuit is arranged between battery and the first equalizing circuit.After such setting, when electric quantity balancing being carried out to battery pack in charging and discharging process, can forbid charging to battery saturated in battery pack, the useful life of whole battery pack is affected to avoid battery overshoot, can also forbid charging to the battery that current voltage is more than or equal to current average voltage in discharge process, improve the equalization efficiency of discharge process.
In one embodiment of the invention, this battery equalizing circuit can also comprise control module, for judging the discharge and recharge situation of battery pack, when battery pack is charged state, judge the current voltage that the first sample circuit is uploaded, if there is the current voltage of a battery to reach capacity voltage in battery pack, cut off the charge circuit of battery pack and power supply circuits, control the battery that the first equalizing circuit and the second equalizing circuit do not reach capacity to current voltage in battery pack and charge.
When battery pack is discharge condition, the current voltage that the first sample circuit is uploaded is averaging, calculates the current voltage of each battery and the difference of current average voltage; When difference be greater than preset threshold values time, control the first equalizing circuit and the second equalizing circuit and be greater than the battery charging presetting threshold values to difference in battery pack.The control module increased can realize the Based Intelligent Control of battery set charge/discharge balancing procedure, avoids manually judging, controls battery electric quantity balanced, improves electric quantity balancing efficiency.
In one embodiment of the invention, this battery equalizing circuit can also comprise the second sample circuit be arranged in the charge cable of battery pack, for gathering the current flow on cable, and passes to control module.The main purpose that second sample circuit is arranged is that the electric current at convection current overcharge cable place gathers, to confirm that circuit is charged state or discharge condition.
The circuit diagram of a battery equalizing circuit of the present invention embodiment is shown with reference to figure 3, Fig. 3.As shown in Figure 3, for the sake of simplicity, merely illustrate percentage of batteries in Fig. 3, in one embodiment of the invention, the second equalizing circuit comprises transformer, the first diode D1 and energy storage inductor L0; Transformer, the first diode D1, energy storage inductor L0 and battery are electrically connected formation first loop mutually; First equalizing circuit comprises the first switch S 1; The all transformers of former limit Np(of transformer share a former limit Np), the first switch S 1, second switch S2 and battery pack be electrically connected formation second servo loop mutually; Continuous current circuit is energy storage inductor L0, the second diode D2 and storage capacitor Cout is mutually electrically connected and forms.
Wherein, battery protecting circuit comprises magnetic amplifier Lsr and magnetic amplifier control circuit; Magnetic amplifier Lsr is arranged between the secondary N1 of transformer and the first diode D1; Between the anode tap that magnetic amplifier control circuit is connected to the first diode D1 and anode end.
In one embodiment of the invention, the first switch S 1 can be MOSFET pipe; Second switch S2 can be relay.
Physical circuit Fig. 3 below in conjunction with battery equalizing circuit charging is described the battery equalizing circuit charging process circuit all parts process realizing Balance route that cooperatively interacts:
The charge cable of battery pack be connected with charging circuit, closed first switch S 2, disconnection second switch S1, charging circuit starts to charge in the mode of constant current.The current voltage of the first sample circuit to place place battery of each balanced unit gathers, and pass to control module, when in the voltage that all first sample circuits pass over characterize have the current voltage of a battery reached capacity voltage Vref1 time, control module just controls second switch S2 and disconnects, closed first switch S 1, now, transformer all transformers of former limit Np(share a former limit Np), the first switch S 1, charging circuit be mutually electrically connected formed loop.
First switch S 1 is started working with fixed duty cycle and fixing frequency, and in the first switch S 1 conduction period, the former limit Np energy of transformer passes to each group of secondary N1 by transformer, and the number passing to secondary N1 energy depends on magnetic amplifier Lsr ON time.
The first switch S 1 one signals given by control module control timer, make the first switch S 1 with set time break-make, the duty ratio of the first switch S 1 (ratio in the duration of duty ratio positive pulse and pulse total cycle) is made to be D, cycle is T, magnetic amplifier Lsr conducting duty ratio is d, this value depends on the delay service time t that magnetic reset circuit controls, if the delay service time t that magnetic amplifier control circuit controls magnetic amplifier Lsr is greater than DT, so magnetic amplifier ON time is 0, and namely electricity can not pass to corresponding battery.
If the delay service time t that magnetic amplifier control circuit controls magnetic amplifier Lsr is less than DT, then magnetic amplifier Lsr service time is DT-t, electricity can pass to battery by magnetic amplifier Lsr, energy storage inductor L0, when magnetic amplifier Lsr service time is DT, magnetic amplifier Lsr is equivalent to short circuit, the electricity now passed is maximum, and is determined by former secondary circuit parameter.Therefore balanced unit can control the size of each winding rechargeable energy of secondary by respective magnetic amplifier control circuit and magnetic amplifier Lsr.
In charging process, each first sample circuit all ceaselessly gathers the voltage of place place battery, and pass to control module, for the battery that voltage has reached capacity, control module just controls the delay service time t that magnetic amplifier control circuit sends to magnetic amplifier Lsr and is greater than DT, magnetic amplifier Lsr is thoroughly turned off, complete charge; For the battery do not reached capacity, control module just controls the delay service time t that magnetic amplifier control circuit sends to magnetic amplifier Lsr and is less than DT, make magnetic amplifier Lsr conducting, charge in the mode of constant current to battery, the voltage Vref1 until voltage reaches capacity.
Physical circuit Fig. 3 below in conjunction with battery equalizing circuit charging is described the battery equalizing circuit discharge process circuit all parts process realizing Balance route that cooperatively interacts:
First sample circuit moment detected each battery cell voltage Vi of battery pack, the voltage that all first sample circuits are uploaded is carried out being averaging the average voltage Vavg obtained now by control module, and the current voltage of every batteries and current average voltage Vavg are compared, the difference of both acquisitions.
When difference exceed preset threshold values Vref2 time, control module just controls second switch S2 and closes, first switch S 1 turns off, and makes all transformers of former limit Np(of transformer share a former limit Np), the first switch S 1, battery pack be mutually electrically connected formed loop.
First switch S 1 is started working with fixed duty cycle and fixing frequency, in the first switch S 1 conduction period, for battery current voltage higher than average voltage Vavg, control module just controls the delay service time t that magnetic amplifier control circuit sends to magnetic amplifier Lsr and is greater than DT, guarantees that current voltage does not charge higher than the battery of current average voltage; For the current voltage of battery lower than the certain threshold values of current average voltage Vavg, control module just controls the delay service time t that magnetic amplifier control circuit sends to magnetic amplifier Lsr and is less than DT, make magnetic amplifier Lsr conducting, charge in the mode of constant current to battery, until voltage reaches average voltage Vavg.
Discharge regime, by above-mentioned discharge flow path, when certain batteries current voltage any amount certain for the current average voltage of this moment battery, illustrate that the electricity of each battery in battery pack is unbalanced, now start equalizing circuit, give the charging of this battery from bus, be equivalent to supplement to the battery of off-capacity from power taking other batteries, until this battery current voltage reaches the current average voltage Vavg of battery pack.
Show the flow chart 400 of a control method embodiment of battery equalizing circuit of the present invention with reference to figure 4, Fig. 4, this control method comprises step 401 to step 409.
In step 401, the current status of battery pack is judged.Concrete judges that battery pack is in charged state or is in discharge condition, exactly if be in charged state just enter step 402, if discharge condition just enters step 406.
In one embodiment of the invention, the current conditions of the charge cable of battery pack can be gathered by the second sample circuit, flow through when charge cable there being electric current and just can show that battery pack is in charged state, when charge cable does not have power supply to flow through, then show battery pack and be in discharge condition.
In step 402, when battery pack is in charged state, obtain the current voltage of each battery; Concrete operations flow process is, each first sample circuit ceaselessly gathers the voltage of its place place battery, and voltage is passed to control module.
In step 403, when there being the current voltage of a battery to have reached capacity voltage in battery pack.
In step 404, cut off the charge circuit of battery pack and power supply circuits, conducting first equalizing circuit and the second equalizing circuit, make the first equalizing circuit and power supply circuits form loop (loop that the former limit of conducting transformer, the first switch and charging circuit are formed) simultaneously.
In step 405, control the first equalizing circuit with fixed duty cycle break-make, electricity is passed to the battery charging that the second equalizing circuit does not reach capacity to voltage in battery pack; Namely the first switch S 1 is controlled with fixed duty cycle break-make, to the battery charging that current voltage in battery pack does not reach capacity.
In one embodiment of the invention, the ON time controlling the first equalizing circuit is less than the second equalizing circuit and postpones service time, be described as during the physical circuit of composition graphs 3, control magnetic amplifier control circuit and be less than ON time in the first switch S 1 cycle to the delay service time that magnetic amplifier Lsr sends.Concrete operations flow process is, control module controls magnetic amplifier control circuit and sends delay service time t to magnetic amplifier Lsr, makes delay service time t be less than DT, makes magnetic amplifier Lsr conducting, charge in the mode of constant current to battery, the voltage Vref until voltage reaches capacity.
In one embodiment of the invention, in charging process, when cell voltage has reached capacity voltage, the ON time controlling the first equalizing circuit is less than the second equalizing circuit and postpones service time.Be described as during the physical circuit of composition graphs 3, control magnetic amplifier control circuit and be greater than ON time in the first switch periods to the delay service time that magnetic amplifier Lsr sends.Concrete operations flow process is, control module just controls the delay service time t that magnetic amplifier control circuit sends to magnetic amplifier Lsr and is greater than DT, magnetic amplifier Lsr is thoroughly turned off, complete charge.
In a step 406, when battery pack is in discharge condition, obtain the current voltage of each battery, and calculate the current average voltage of all batteries; Voltage is herein all the time all in collection, and average voltage is also all the time all in calculating.
In step 407, the current voltage of battery and the difference of current average voltage is calculated;
The concrete operations flow process of the circuit diagram shown in above-mentioned steps 406 and step 407 composition graphs 3 is, first sample circuit moment detected each battery cell voltage Vi of battery pack, the current voltage that all first sample circuits are uploaded is carried out being averaging the current average voltage Vavg obtained now by control module, and the current voltage of every batteries and current average voltage Vavg are compared, the difference of both acquisitions.
In a step 408, when difference be greater than preset threshold values Vref2(preset threshold values user can sets itself, such as 100mv, 150mv), conducting first equalizing circuit and the second equalizing circuit, make the first equalizing circuit and battery pack form loop (i.e. second servo loop) simultaneously;
When difference exceed preset threshold values Vref2 time, control module just controls second switch S2 and closes, first switch S 1 turns off, and makes all transformers of former limit Np(of transformer share a former limit Np), the first switch S 1, battery pack be electrically connected formation second servo loop mutually.
In step 409, control the first switch with fixed duty cycle break-make, electricity is passed to the second equalizing circuit and be greater than the battery charging presetting threshold values to difference in battery pack.
The concrete operations flow process of step 409 is, control module just controls the delay service time t that magnetic amplifier control circuit sends to magnetic amplifier Lsr and is greater than DT, guarantees that current voltage does not charge higher than the battery of current average voltage.For the current voltage of battery and the difference of current average voltage Vavg be greater than preset threshold values Vref2 time, control module just controls the delay service time t that magnetic amplifier control circuit sends to magnetic amplifier Lsr and is less than DT, make magnetic amplifier Lsr conducting, charge in the mode of constant current to battery, until voltage reaches average voltage Vavg.
At discharge regime, by ceaselessly repeating step 406 to step 409, when any certain batteries current voltage amount certain for the average voltage of present battery group, explanation battery electric quantity is unbalanced, now start equalizing circuit, give the charging of this battery from bus, be equivalent to supplement to the battery of off-capacity from other battery assembly module power takings, until this battery current voltage reaches the current average voltage Vavg of battery pack, reach the object of battery electric quantity equilibrium.
Claims (7)
1. a battery equalizing circuit, for the multiple batteries be connected in series in balancing battery group, its feature exists, and comprising:
First equalizing circuit, for giving the second equalizing circuit by the charge transport of charging circuit and battery pack;
Some second equalizing circuits, pass to connected battery for the electricity the first equalizing circuit transmission come;
Some continuous current circuits, after disconnecting for the first equalizing circuit, the electric current of inductance in afterflow second freewheeling circuit;
Some first sample circuits, for ceaselessly gathering the current voltage of connected battery;
Timer, gives described first equalizing circuit signal for timing, makes the first equalizing circuit periodically break-make;
Some battery protecting circuits, for battery charging process battery reach capacity voltage time and/or battery discharge procedure battery current voltage be more than or equal to battery pack current average voltage time forbid that the electricity of the first equalizing circuit is passed to the second equalizing circuit;
Described first equalizing circuit is in parallel with described battery pack; Each first sample circuit is connected with a battery respectively; Each second equalizing circuit respectively with a cell parallel after, be electrically connected with described first equalizing circuit; Each continuous current circuit is connected with the second equalizing circuit linked together and battery respectively; Described battery protecting circuit is connected between battery and the second equalizing circuit; Described timer and described first equalizing circuit are electrically connected;
Described second equalizing circuit comprises transformer, the first diode and energy storage inductor; Described transformer, described first diode, described energy storage inductor and described battery are electrically connected formation first loop mutually; Described first equalizing circuit comprises the first switch; The former limit of described transformer, the first switch, second switch and battery pack are electrically connected formation second servo loop mutually; Described continuous current circuit is described energy storage inductor, the second diode and storage capacitor are mutually electrically connected and form; Described battery protecting circuit comprises magnetic amplifier and magnetic amplifier control circuit; Described magnetic amplifier is arranged between the secondary of described transformer and described first diode; Described magnetic amplifier control circuit is connected between the anode tap of described first diode and described anode end.
2. battery equalizing circuit according to claim 1, its feature exists: also comprise control module, for judging the charge condition of battery pack, when battery pack is charged state, judge the current voltage that the first sample circuit is uploaded, if there is a battery current voltage to reach capacity voltage in battery pack, cut off the charge circuit of battery pack and power supply circuits, control the battery that the first equalizing circuit and the second equalizing circuit do not reach capacity to current voltage in battery pack and charge;
When battery pack is discharge condition, the current voltage that the first sample circuit is uploaded is averaging, calculates the current voltage of each battery and the difference of current average voltage; When difference be greater than preset threshold values time, control the first equalizing circuit and the second equalizing circuit and be greater than the battery charging presetting threshold values to difference in battery pack.
3. battery equalizing circuit according to claim 2, its feature exists: also comprise be arranged on described battery pack charge cable on the second sample circuit, for gathering the current flow on cable, and pass to control module.
4., according to the control method of the arbitrary described battery equalizing circuit of claim 1-3, it is characterized in that, comprise the following steps:
Judge the current status of described battery pack;
When battery pack is in charged state, obtain the current voltage of each battery;
When there being the current voltage of a battery to reach capacity voltage in battery pack, cut off the charge circuit of battery pack and power supply circuits, conducting first equalizing circuit and the second equalizing circuit, make the first equalizing circuit and power supply circuits form loop simultaneously;
Control the first equalizing circuit with fixed duty cycle break-make, electricity is passed to the battery charging that the second equalizing circuit does not reach capacity to current voltage in battery pack;
When battery pack is in discharge condition, obtain the current voltage of each battery, and calculate the current average voltage of all batteries;
Calculate the difference between the current voltage of battery and described current average voltage;
Preset threshold values when described difference is greater than, conducting first equalizing circuit and the second equalizing circuit, make the first equalizing circuit and power supply circuits form loop simultaneously;
Control the first equalizing circuit with fixed duty cycle break-make, electricity is passed to the second equalizing circuit and be greater than the battery charging presetting threshold values to difference in battery pack.
5. the control method of battery equalizing circuit according to claim 4, it is characterized in that, electricity, with fixed duty cycle break-make, is passed to the charge battery step that the second equalizing circuit do not reach capacity to current voltage in battery pack and comprises further by described control first equalizing circuit: control described second equalizing circuit and postpone the ON time that service time is less than the first equalizing circuit.
6. the control method of battery equalizing circuit according to claim 4, is characterized in that, in charging process, when the current voltage of battery has reached capacity voltage, the second equalizing circuit postpones the ON time that service time is greater than the first equalizing circuit.
7., according to the control method of the arbitrary described battery equalizing circuit of claim 4-6, it is characterized in that, judge that described battery pack current status step comprises further: the electric current obtaining the charge cable of described battery pack; If there is electric current to flow through, being charged state, if no current flows through, is discharge condition.
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| CN105429488A (en) * | 2015-12-16 | 2016-03-23 | 中国电子科技集团公司第四十三研究所 | Magnetic amplifier based switch power supply self-feedback circuit and control method therefor |
| CN105609885B (en) * | 2015-12-30 | 2019-10-25 | 国安新能源（荆门）有限公司 | A kind of control method and control circuit of power battery constant current equilibrium |
| CN106911167B (en) * | 2017-04-28 | 2024-01-30 | 易事特集团股份有限公司 | Unidirectional active equalization circuit for energy storage |
| CN107069876B (en) * | 2017-04-28 | 2023-11-07 | 易事特集团股份有限公司 | Unidirectional active equalization circuit for energy storage |
| TWI646753B (en) * | 2017-05-19 | 2019-01-01 | 迪吉亞節能科技股份有限公司 | Analog-to-dc controllable current electronic switch, charging method using the same, and discharging method using the same |
| CN110015178B (en) * | 2017-08-31 | 2022-10-18 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic device |
| CN109387785B (en) * | 2018-12-05 | 2022-01-07 | 广东博力威科技股份有限公司 | Single-section voltage acquisition system of multi-string battery pack |
| CN112653206A (en) * | 2020-11-18 | 2021-04-13 | 中国南方电网有限责任公司超高压输电公司广州局 | Dynamic balancing method and device for power communication power supply battery pack |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101467325A (en) * | 2006-06-15 | 2009-06-24 | Sk能源株式会社 | Charge equalization apparatus and method |
| CN102856936A (en) * | 2011-06-29 | 2013-01-02 | 北汽福田汽车股份有限公司 | Device for balancing power batteries |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0759266A (en) * | 1993-08-17 | 1995-03-03 | Toshiba Corp | Secondary battery charging circuit |
-
2014
- 2014-09-11 CN CN201410458737.8A patent/CN104201743B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101467325A (en) * | 2006-06-15 | 2009-06-24 | Sk能源株式会社 | Charge equalization apparatus and method |
| CN102856936A (en) * | 2011-06-29 | 2013-01-02 | 北汽福田汽车股份有限公司 | Device for balancing power batteries |
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