CN203406637U - Battery pack active balancing circuit based on feedback control - Google Patents
Battery pack active balancing circuit based on feedback control Download PDFInfo
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- CN203406637U CN203406637U CN201320384097.1U CN201320384097U CN203406637U CN 203406637 U CN203406637 U CN 203406637U CN 201320384097 U CN201320384097 U CN 201320384097U CN 203406637 U CN203406637 U CN 203406637U
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Abstract
The utility model discloses a battery pack active balancing circuit based on feedback control. The circuit comprises a controller, an energy storage capacitor and N energy transfer circuits, wherein the controller acquires the electric quantity information of N batteries and the battery pack mean electric quantity information, and controls the alternative cyclic turn on and turn off of a battery-side switch in the energy transfer circuit corresponded with one or more batteries with electric quality higher than the mean value among the N batteries, so that the electric energy of one or more batteries with electric quality higher than the mean value is transferred to the energy storage capacitor by the corresponding energy transfer circuit; the controller also controls the alternative cyclic turn on and turn off of a common-side switch in the energy transfer circuit corresponded with one or more batteries with electric quality lower than the mean value among the N batteries, so that the electric energy of the energy storage capacitor is transferred to one or more batteries with electric quality lower than the mean value by the corresponding energy transfer circuit. The energy transfer among any number of batteries on any positions in the battery pack can be performed, with high energy transfer efficiency.
Description
Technical field
The utility model relates to a kind of battery pack active equalization circuit based on FEEDBACK CONTROL, it is for moving as battery pack realizes energy many strings energy-storage units, with balanced energy storage state, it is mainly used in new forms of energy product, battery and similar battery class is needed the energy storaging product of electronic circuit; It includes but not limited to following application: lithium-ions battery management system, lithium polymer battery battery management system, lead accumulator, nickel-cadmium cell, Ni-MH battery, super capacitor, and the peripheral electron circuit of novel energy-storing product.
Background technology
In battery management system, equalizing circuit, for the state-of-charge of each batteries of balancing battery group, can effectively improve battery performance, extending battery life.And the loss of active equalization circuit because, generating heat littlely, euqalizing current is larger and be subject to extensive concern.
Fig. 1 shows a kind of active equalization circuit of the prior art, for balance, compose in series the energy storage state of the battery B1 to B4 of battery pack, it comprises controller, interrupteur SW 1 to SW5 and as the inductance L 1 of energy-storage travelling wave tube to L3, one end of each inductance is connected on to be needed between two batteries that energy moves, the anode that is connected on high crosstalk pond that the other end replaces by switch respectively and the negative terminal in low crosstalk pond, this active equalization electricity path control deivce is the on off state of control switch SW1 to SW5 respectively, the energy of the higher battery of the adjacent electric weight in position in battery pack is moved to the lower battery of electric weight by inductance, and by multiple energy, move the energy storage state balance that realizes each battery in whole battery pack.But each ability of this active equalization circuit is moved and can only be occurred between two adjacent batteries, at the battery of high electric weight and low electric weight relatively far apart time, need to move the energy storage state balance that can realize them through multiple energy, therefore, can cause a large amount of losses of the energy content of battery, available battery charge reduces and produces heating problem.
Fig. 2 shows another kind of active equalization circuit of the prior art, and it comprises that controller, interrupteur SW 1 are to SW3, has the transformer of secondary winding L 4, former limit winding L 1 to L3, and diode D1.This active equalization circuit utilizes multi winding transformer to realize active equalization, when certain batteries electric weight is too high, by controller, control corresponding switch closed, make to produce alternating current in secondary coil L4, through transformer and diode D1 rectification, electric energy is filled with whole battery pack from the too high battery of this single-unit electric weight.Sort circuit can solve the problem of moving hypertelorism of the active equalization circuit shown in Fig. 1 to a certain extent.But because any time only have a batteries can carry out equilibrium, for whole battery pack, the ability of equalization of this active equalization circuit a little less than.
Utility model content
Technical problem to be solved in the utility model, is just to provide a kind of battery pack active equalization circuit based on FEEDBACK CONTROL, and the energy that can realize between the battery of optional position in battery pack, any amount is moved.
Solve the problems of the technologies described above, the technical method that the utility model adopts is as follows:
A kind of battery pack active equalization circuit based on FEEDBACK CONTROL, energy storage state for balancing battery group N batteries, wherein, N is more than or equal to 2 natural number, it is characterized in that: described active equalization circuit comprises that controller, a storage capacitor and N energy moves circuit, described in each, energy is moved circuit by battery side inductance, battery side fly-wheel diode, battery side switch, intermediate capacitance, public side switch, public side fly-wheel diode and public side inductance form, wherein, the positive input terminal of circuit is moved in one end of described battery side inductance as energy, the other end is connected with the negative electrode of described battery side fly-wheel diode and is connected to one end of described intermediate capacitance, the anode of described battery side fly-wheel diode is moved the negative input end of circuit as energy, described battery side switch and battery side fly-wheel diode are in parallel, the other end of described intermediate capacitance is connected with the anode of public side fly-wheel diode and is connected to one end of described public side inductance, described public side switch and public side fly-wheel diode are in parallel, the other end of described public side inductance is moved the positive output end of circuit as energy, the negative electrode of described public side fly-wheel diode is moved the negative output terminal of circuit as energy,
A described N energy is moved the corresponding output end that the battery side switch of circuit and the control end of public side switch are connected respectively to described controller, the positive output end that a described N energy is moved circuit is connected, negative output terminal is connected and ground connection, described storage capacitor is connected to this N energy and moves between the public positive output end and public negative output terminal of circuit, and, it is corresponding one by one with N batteries that a described N energy is moved circuit, and each energy moves the positive input terminal of circuit and the positive pole of corresponding battery is connected, negative input end is connected with the negative pole of corresponding battery.
Preferred implementation as the utility model active equalization circuit, battery side switch and public side switch that a described N energy is moved circuit are transistor, described controller output pwm signal, for controlling respectively opening and turn-offing of each battery side switch and public side switch cycle alternation.
Compared with prior art, the utlity model has following beneficial effect:
The utility model absorbs by storage capacitor the energy that the too high battery of electric weight is emitted, emit energy to the too low battery of electric weight, and by energy, move the energy that circuit realizes between battery and storage capacitor and move, therefore, the utility model can be realized optional position in battery pack, energy between the battery of any amount is moved, and the utility model only needs once to take out of and move into can be realized the high electric weight battery of any joint to the energy between the low electric weight battery of joint arbitrarily and move, it has overcome moves efficiency (loss) and moves the contradiction between ability in prior art, it is low that it carries out the loss that energy moves, there is high-energy and move efficiency.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the circuit theory diagrams of one of active equalization circuit of the prior art;
Fig. 2 is two circuit theory diagrams of active equalization circuit of the prior art;
Fig. 3 is the circuit theory diagrams of active equalization circuit of the present utility model.
Embodiment
Battery pack active equalization circuit based on FEEDBACK CONTROL of the present utility model, for the energy storage state of balancing battery group N batteries, wherein, N is more than or equal to 2 natural number.Active equalization circuit of the present utility model comprises that controller, storage capacitor C0 and N energy move circuit, each energy is moved circuit by battery side inductance, battery side fly-wheel diode, battery side switch, intermediate capacitance, public side switch, public side fly-wheel diode and public side inductance form, wherein, the positive input terminal of circuit is moved in one end of battery side inductance as energy, the other end is connected with the negative electrode of battery side fly-wheel diode and is connected to one end of intermediate capacitance, the anode of battery side fly-wheel diode is moved the negative input end of circuit as energy, battery side switch and battery side fly-wheel diode are in parallel, the other end of intermediate capacitance is connected with the anode of public side fly-wheel diode and is connected to one end of public side inductance, public side switch and public side fly-wheel diode are in parallel, the other end of public side inductance is moved the positive output end of circuit as energy, the negative electrode of public side fly-wheel diode is moved the negative output terminal of circuit as energy,
N energy moved the corresponding output end that the battery side switch of circuit and the control end of public side switch are connected respectively to controller, the positive output end that N energy moved circuit is connected, negative output terminal is connected and ground connection, storage capacitor C0 is connected to this N energy and moves between the public positive output end and public negative output terminal of circuit, and, it is corresponding one by one with N batteries that N energy moved circuit, and each energy moves the positive input terminal of circuit and the positive pole of corresponding battery is connected, negative input end is connected with the negative pole of corresponding battery.
Wherein, a N of the present utility model energy is moved battery side switch and the public side switch of circuit and can be selected transistor to realize, accordingly, controller output pwm signal, for controlling respectively opening and turn-offing of each battery side switch and public side switch cycle alternation.Energy storage capacitor C0 of the present utility model selects the large bulk capacitance that meets the balanced needs of battery electric quantity.Fly-wheel diode of the present utility model can be selected Schottky diode, also can select other forms of switching device to realize, such as NMOS and PMOS etc., with the higher synchronous rectification of implementation efficiency.
The control method that the invention also discloses the above-mentioned active equalization circuit based on FEEDBACK CONTROL, it comprises the following steps:
Controller obtains N batteries information about power separately and the average information about power of battery pack in battery pack;
Controller is according to the information about power of obtaining, control any joint in N batteries or more piece electric weight and move opening and turn-offing of battery side switch cycle alternation in circuit higher than the corresponding energy of battery of average, make this joint or more piece electric weight by corresponding energy, move circuit higher than the electric energy of the battery of average and move in storage capacitor C0;
Meanwhile, controller is controlled any joint in N batteries or more piece electric weight and is moved opening and turn-offing of public side switch cycle alternation in circuit lower than the corresponding energy of battery of average, makes the electric energy of storage capacitor C0 move circuit by corresponding energy and moves in this joint or the battery of more piece electric weight lower than average.
Fig. 3 shows and utilizes the utility model a battery pack being comprised of 3 batteries B1～B3 to be carried out to the specific embodiment of energy storage state balance, the active equalization circuit of the present embodiment comprises that controller (not shown), storage capacitor C0 and 3 energy move circuit, wherein, the energy of corresponding battery B1 is moved electric routing battery side inductance L 1
bAT, battery side sustained diode 1
c, battery side interrupteur SW 1
d, intermediate capacitance C1, public side interrupteur SW 1
c, public side sustained diode 1
dwith public side inductance L 1
cAPform, it is identical that the energy of corresponding battery B2, B3 is moved the circuit form that circuit moves circuit with the energy of corresponding battery B1, do not repeat them here.The operation principle of the active equalization circuit of the present embodiment is as follows:
At controller, obtain and learn that the electric weight of battery B1 and battery B3 is higher than the average electric weight of battery pack, the electric weight of battery B2 is during lower than the average electric weight of battery pack, and controller is controlled battery side interrupteur SW 1
dwith battery side interrupteur SW 3
dopening and turn-offing of cycle alternation, can, by pwm signal control switch, make the electric energy of battery B1 through battery side inductance L 1
bAT, intermediate capacitance C1, battery side sustained diode 1
cwith public side inductance L 1
cAPmove to storage capacitor C0, and make the electric energy of battery B3 through battery side inductance L 3
bAT, intermediate capacitance C3, battery side sustained diode 3
cwith public side inductance L 3
cAPmove to storage capacitor C0; Meanwhile, controller is controlled public side interrupteur SW 2
copening and turn-offing of cycle alternation, makes the electric energy of storage capacitor C0 through public side inductance L 2
cAP, intermediate capacitance C2, public side sustained diode 2
dwith battery side inductance L 2
bATmove to battery B2, with this, realize the electric quantity balancing of this battery pack.
Active equalization circuit for the present embodiment is only moved the electric energy of the high electric weight battery of any joint to the control method of the low electric weight battery of any joint, and it is identical with above-mentioned control method principle, does not repeat them here.
In addition, active equalization circuit of the present utility model carries out electric quantity balancing to the battery pack being comprised of 2 batteries or the battery pack that is comprised of 4 joints or above battery, it needs correspondingly to need balanced battery that corresponding energy is set to move circuit and can realize, its controlling party ratio juris is identical with above-mentioned principle, does not repeat them here.
The utility model does not limit to and above-mentioned embodiment; according to foregoing; according to ordinary skill knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought of the utility model prerequisite; the utility model can also be made equivalent modifications, replacement or the change of other various ways, all drops among protection range of the present utility model.
Claims (2)
1. the battery pack active equalization circuit based on FEEDBACK CONTROL, energy storage state for balancing battery group N batteries, wherein, N is more than or equal to 2 natural number, it is characterized in that: described active equalization circuit comprises that controller, storage capacitor (C0) and N energy move circuit, described in each, energy is moved circuit by battery side inductance, battery side fly-wheel diode, battery side switch, intermediate capacitance, public side switch, public side fly-wheel diode and public side inductance form, wherein, the positive input terminal of circuit is moved in one end of described battery side inductance as energy, the other end is connected with the negative electrode of described battery side fly-wheel diode and is connected to one end of described intermediate capacitance, the anode of described battery side fly-wheel diode is moved the negative input end of circuit as energy, described battery side switch and battery side fly-wheel diode are in parallel, the other end of described intermediate capacitance is connected with the anode of public side fly-wheel diode and is connected to one end of described public side inductance, described public side switch and public side fly-wheel diode are in parallel, the other end of described public side inductance is moved the positive output end of circuit as energy, the negative electrode of described public side fly-wheel diode is moved the negative output terminal of circuit as energy,
A described N energy is moved the corresponding output end that the battery side switch of circuit and the control end of public side switch are connected respectively to described controller, the positive output end that a described N energy is moved circuit is connected, negative output terminal is connected and ground connection, described storage capacitor (C0) is connected to this N energy and moves between the public positive output end and public negative output terminal of circuit, and, it is corresponding one by one with N batteries that a described N energy is moved circuit, and each energy moves the positive input terminal of circuit and the positive pole of corresponding battery is connected, negative input end is connected with the negative pole of corresponding battery.
2. the battery pack active equalization circuit based on FEEDBACK CONTROL according to claim 1, it is characterized in that: battery side switch and public side switch that a described N energy is moved circuit are transistor, described controller output pwm signal, for controlling respectively opening and turn-offing of each battery side switch and public side switch cycle alternation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320384097.1U CN203406637U (en) | 2013-06-28 | 2013-06-28 | Battery pack active balancing circuit based on feedback control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320384097.1U CN203406637U (en) | 2013-06-28 | 2013-06-28 | Battery pack active balancing circuit based on feedback control |
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| CN203406637U true CN203406637U (en) | 2014-01-22 |
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| CN201320384097.1U Expired - Lifetime CN203406637U (en) | 2013-06-28 | 2013-06-28 | Battery pack active balancing circuit based on feedback control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414218A (en) * | 2013-06-28 | 2013-11-27 | 广东电网公司电力科学研究院 | Battery pack active equalization circuit based on feedback control, and control method thereof |
| CN109038698A (en) * | 2017-06-12 | 2018-12-18 | 周锡卫 | A kind of moving type active equalization battery group string management system and control method based on monomer voltage |
-
2013
- 2013-06-28 CN CN201320384097.1U patent/CN203406637U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414218A (en) * | 2013-06-28 | 2013-11-27 | 广东电网公司电力科学研究院 | Battery pack active equalization circuit based on feedback control, and control method thereof |
| CN103414218B (en) * | 2013-06-28 | 2015-06-10 | 广东电网公司电力科学研究院 | Battery pack active equalization circuit based on feedback control, and control method thereof |
| CN109038698A (en) * | 2017-06-12 | 2018-12-18 | 周锡卫 | A kind of moving type active equalization battery group string management system and control method based on monomer voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Guangzhou City, Guangdong province Yuexiu District 510080 Dongfeng East Road, No. 8 building water Kong Guangdong Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Corp. Patentee after: Guangdong Saiwei Electronics Co.,Ltd. Address before: Guangzhou City, Guangdong province Yuexiu District 510080 Dongfeng East Road, No. 8 building water Kong Guangdong Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Corp. Patentee before: DONGGUAN CELLWISE MICROELECTRONICS Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Guangzhou City, Guangdong province Yuexiu District 510080 Dongfeng East Road, No. 8 building water Kong Guangdong Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Co.,Ltd. Patentee after: Guangdong Saiwei Electronics Co.,Ltd. Address before: Guangzhou City, Guangdong province Yuexiu District 510080 Dongfeng East Road, No. 8 building water Kong Guangdong Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Corp. Patentee before: Guangdong Saiwei Electronics Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221102 Address after: 523808 room 402, 404, 408, building 1, no.6, South Industrial Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee after: Guangdong Saiwei Electronics Co.,Ltd. Address before: Guangzhou City, Guangdong province Yuexiu District 510080 Dongfeng East Road, No. 8 building water Kong Guangdong Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Co.,Ltd. Patentee before: Guangdong Saiwei Electronics Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140122 |
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| CX01 | Expiry of patent term |