CN103855756B - Passive type equalizing circuit and corresponding passive type equalization methods - Google Patents
Passive type equalizing circuit and corresponding passive type equalization methods Download PDFInfo
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- CN103855756B CN103855756B CN201310594784.0A CN201310594784A CN103855756B CN 103855756 B CN103855756 B CN 103855756B CN 201310594784 A CN201310594784 A CN 201310594784A CN 103855756 B CN103855756 B CN 103855756B
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Abstract
The invention discloses a kind of passive type equalizing circuit, it comprises multiple energy-storage units, multiple balanced unit and tdm controller.Described multiple energy-storage units is cascaded.The energy-storage units that each balanced unit is corresponding with one is respectively connected, to gather the voltage of the energy-storage units of described correspondence, thus determine whether to perform equalization operation to the energy-storage units of described correspondence, and when needing to perform equalization operation, equalization operation is performed to the energy-storage units of described correspondence.Described tdm controller connects described multiple balanced unit, to perform the number of the balanced unit of equalization operation as required, and control at times describedly to need to perform the energy-storage units of balanced unit to described correspondence of equalization operation and perform equalization operation at times.
Description
Technical field
The present invention relates to the management system of energy storaging product, particularly relate in multiple energy-storage units, realize balancing energy passive type equalizing circuit and corresponding passive type equalization methods.
Background technology
Energy storaging product, other energy storage products of such as battery or similar battery, are widely used in each electronic product.Below for battery, a battery pack generally includes the battery of multiple mutual series connection, and because each battery is in the difference of each side such as charged state, impedance and temperature characterisitic, it is unbalanced that it can cause between these batteries.By making, the capacity of whole battery pack reduces this unbalanced phenomena, the lost of life.Therefore, design equalizing circuit at present to regulate the battery of multiple series connection, thus kept the capacity of battery pack, extend the life-span of battery pack.And passive type equalizing circuit simply obtains apply widely because of with low cost, structure.
Fig. 1 is a kind of schematic diagram of existing passive type equalizing circuit.As shown in Figure 1, existing passive type equalizing circuit comprises battery 110 and the multiple balanced unit 120 that 100 comprise multiple series connection, and the balanced unit 120 that wherein each battery 110 is corresponding with is respectively connected.Each balanced unit 120 comprises comparator 121, balanced starting resistor source 122, equalizing resistance 123 and switch element 124.
Wherein, an input of comparator 121 is electrically connected corresponding battery 110 to gather the voltage of corresponding battery 110, and its another input is electrically connected balanced starting resistor source 122, thus the balanced starting resistor that the voltage of corresponding battery 110 and balanced starting resistor source 122 provide is compared, to produce corresponding control signal.
Equalizing resistance 123 and switch element 124 are connected in parallel on the positive and negative electrode end of corresponding battery 110, thus form a balanced loop, and the control signal that the output that switch element 124 connects comparator 121 further produces to receive comparator 121, thus switch element 124 whether conducting is determined according to control signal, whether the balanced loop that namely equalizing resistance 123, switch element 124 are formed performs equalization operation to the battery 110 of correspondence.
In charging process, the comparator 121 in balanced unit 120 gathers the voltage of corresponding battery 110, and compares with the balanced starting resistor that balanced starting resistor source 122 provides.If the voltage of the corresponding battery 110 gathered is higher than balanced starting resistor, the control signal control switch element 124 that then comparator 121 sends closes, the balanced loop that equalizing resistance 123 and switch element 124 are formed is opened, to utilize equalizing resistance 123 to discharge to corresponding battery 110, to consume the electricity of corresponding battery 110.That is, each battery 110 in battery pack, in charging process, the battery 110 that state of charge is higher more early arrives balanced starting resistor, the time that the balanced loop of its correspondence is opened is also longer, the electricity consumed is also more, thus reaches the object of the electric quantity balancing of each battery 110 in battery pack.
But, existing passive type equalizing circuit 100 can be consumed by the equalizing resistance 123 of correspondence due to electricity unnecessary in each battery 110, so a large amount of heats can be given out when passive type equalizing circuit 100 works, particularly when the balanced starting resistor having the voltage of many batteries 110 to provide higher than balanced starting resistor source 122 in passive type equalizing circuit 100, when needing to perform equalization operation to it, then caloric value can correspondingly increase, and the problem of heat radiation is more serious.Therefore the euqalizing current of existing passive type equalizing circuit 100 can not be too large, and its ability of equalization is limited.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of new passive type equalizing circuit, and it can reduce euqalizing current, reduces caloric value.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of passive type equalizing circuit, it comprises multiple energy-storage units, multiple balanced unit and tdm controller.Described multiple energy-storage units is cascaded.The energy-storage units that each balanced unit is corresponding with one is respectively connected, to gather the voltage of the energy-storage units of described correspondence, thus determine whether to perform equalization operation to the energy-storage units of described correspondence, and when needing to perform equalization operation, equalization operation is performed to the energy-storage units of described correspondence.Described tdm controller connects described multiple balanced unit, to perform the number of the balanced unit of equalization operation as required, and control at times describedly to need to perform the energy-storage units of balanced unit to described correspondence of equalization operation and perform equalization operation at times.
Wherein, each balanced unit comprises Balance route unit and balanced circuit units respectively.Described Balance route unit connects the energy-storage units of described correspondence, to gather the voltage of the energy-storage units of described correspondence, thus determines whether to perform equalization operation to the energy-storage units of described correspondence.Described balanced circuit units is parallel to the energy-storage units of described correspondence, during to determine at described Balance route unit to need to perform equalization operation to the energy-storage units of described correspondence, performs equalization operation to the energy-storage units of described correspondence.
Wherein, described Balance route unit comprises balanced starting resistor source and comparator respectively.The negative electricity that described balanced starting resistor source is electrically connected the energy-storage units of described correspondence is extreme.The first input end of described comparator is electrically connected the positive electricity end of the energy-storage units of described correspondence, and its second input is electrically connected described balanced starting resistor source, and its output is electrically connected described Time-sharing control.Wherein, described comparator gathers the voltage of the energy-storage units of described correspondence, and compares with the balanced starting resistor that described balanced starting resistor source provides, and exports the first corresponding control signal with the output at described comparator.
Wherein, described balanced circuit units comprises equalizing resistance and switch element.Described switch element and described equalizing resistance are cascaded, and the described equalizing resistance be cascaded and described switch element are connected in parallel between the extreme and positive electricity end of the negative electricity of the energy-storage units of described correspondence.Wherein, described switch element receives the second control signal that described tdm controller sends, to determine that whether opening described balanced circuit units performs equalization operation to the energy-storage units of described correspondence.
Wherein, described energy-storage units comprises lithium-ions battery, lithium polymer battery, lead accumulator, nickel-cadmium cell, Ni-MH battery or super capacitor.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of passive type equalization methods, and it comprises the voltage gathering multiple energy-storage units, needs to be performed equalization operation with which determining in described multiple energy-storage units; Perform the number of the energy-storage units of equalization operation as required, and balanced unit corresponding to Time-sharing control and to needing the energy-storage units performing equalization operation to perform equalization operation at times.
Wherein, the voltage of the multiple energy-storage units of described collection needs the step being performed equalization operation to comprise the voltage gathering each energy-storage units respectively with which determining in described multiple energy-storage units; The voltage of each energy-storage units gathered is compared with balanced starting resistor; When above-mentioned comparative result represents that the voltage of this energy-storage units of collection is greater than described balanced starting resistor, then determine that this energy-storage units needs to be performed equalization operation.
The invention has the beneficial effects as follows: the situation being different from prior art, passive type equalizing circuit of the present invention and corresponding passive type equalization methods can utilize tdm controller and open the balanced circuit units needing to perform in the balanced unit of equalization operation at times, thus at times equalization operation is performed to the energy-storage units of correspondence, therefore in the present invention, the euqalizing current of balanced unit when performing equalization operation that each needs to perform equalization operation can be reduced, thus decrease caloric value, how many energy-storage units then no matter are had to be performed equalization operation, its caloric value can't increase, thus farthest utilize the heat-sinking capability of whole system.。
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of existing passive type equalizing circuit;
Fig. 2 is the schematic diagram of the passive type equalizing circuit of the embodiment of the present invention.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to the passive type equalizing circuit proposed according to the present invention and its embodiment of passive type equalization methods, method, step, structure, feature and effect thereof, be described in detail as follows.
Aforementioned and other technology contents, Characteristic for the present invention, can know and present in the detailed description of following cooperation with reference to graphic preferred embodiment.By the explanation of embodiment, when can to the present invention for the technological means reaching predetermined object and take and effect be able to more deeply and concrete understanding, however institute's accompanying drawings be only to provide with reference to and the use of explanation, be not used for being limited the present invention.
Fig. 2 is the schematic diagram of the passive type equalizing circuit of the embodiment of the present invention.As shown in Figure 2, the passive type equalizing circuit 200 of the embodiment of the present invention comprises multiple energy-storage units 210, multiple balanced unit 220 and tdm controller 230.
Wherein, these energy-storage units 210 can be battery or other energy-storage travelling wave tube being similar to battery, such as lithium-ions battery, lithium polymer battery, lead accumulator, nickel-cadmium cell, Ni-MH battery, super capacitor or following novel energy storaging product.These energy-storage units 210 are cascaded to form an energy-storage units string, thus provide energy for other electronic product.
The energy-storage units 210 that each balanced unit 220 is corresponding with one is respectively connected, to gather the voltage of corresponding energy-storage units 210, thus determine whether to perform equalization operation to the energy-storage units 210 of correspondence, and when needing execution equalization operation, equalization operation is performed to the energy-storage units 210 of correspondence.
And tdm controller 230 connects these balanced units 220, to perform the number of the balanced unit 220 of equalization operation as required, and Time-sharing control these need to perform the energy-storage units 210 of balanced unit 220 to correspondence of equalization operation and perform equalization operation at times.
Wherein, each balanced unit 220 comprises comparator 221, balanced starting resistor source 222, equalizing resistance 223 and switch element 224 respectively.Comparator 221 and balanced starting resistor source 222 constitute Balance route unit, and equalizing resistance 223 and switch element 224 constitute balanced circuit units.
The Balance route unit that comparator 221 and balanced starting resistor source 222 are formed, connects corresponding energy-storage units 210, to gather the voltage of corresponding energy-storage units 210, thus determines whether to perform equalization operation to the energy-storage units 210 of correspondence.
Particularly, an input of comparator 221 is electrically connected corresponding energy-storage units 210, to gather the voltage of corresponding energy-storage units 210, and its another input is electrically connected balanced starting resistor source 222, therefore, the balanced starting resistor that the voltage of the energy-storage units 210 that comparator 221 is more corresponding and balanced starting resistor source 222 provide, when the voltage of the energy-storage units 210 of correspondence is greater than the balanced starting resistor that balanced starting resistor source 222 provides, then mean that corresponding energy-storage units 210 needs to be performed equalization operation, therefore the output of comparator 221 can export the first corresponding control signal.
At this, an input of comparator 221 can be made to be electrically connected the positive electricity end of corresponding energy-storage units 210; And the negative electricity that balanced starting resistor source 222 is electrically connected corresponding energy-storage units 210 is extreme, and be electrically connected to another input of comparator 221 further, the voltage of the energy-storage units 210 of the balanced starting resistor provided to make balanced starting resistor source 222 and the correspondence of collection is on same benchmark, thus can the voltage of the accurately energy-storage units 210 of the correspondence of the balanced starting resistor that provides of more balanced starting resistor source 222 and collection.
Tdm controller 230 is electrically connected the output of the comparator 221 in Balance route unit respectively, to receive the first control signal that each comparator 221 exports, thus according to the first control signal that each comparator 221 exports, and define which balanced unit 220 and need to perform equalization operation to the energy-storage units 210 of correspondence, then tdm controller 230 its can perform the number of the balanced unit 220 of equalization operation as required and produce corresponding second control signal.
And equalizing resistance 223 and switch element 224 constitute balanced circuit units, be parallel to corresponding energy-storage units 210, during to determine at Balance route unit to need to perform equalization operation to the energy-storage units 210 of correspondence, equalization operation is performed to the energy-storage units 210 of correspondence.
Equalizing resistance 223 and switch element 224 are cascaded, and the equalizing resistance 223 be cascaded and switch element 224 are connected in parallel between the extreme and positive electricity end of the negative electricity of corresponding energy-storage units 210.
Switch element 224 connects tdm controller 230 further, to receive the second control signal that tdm controller 230 sends, wherein these second control signals can be pulse signal, it can perform the number of the balanced unit 220 of equalization operation as required and distribute certain duty ratio, thus in turn at times conducting these need to perform the balanced unit 220 of equalization operation.That is, the balanced unit 220 performing equalization operation is needed for each, it is not can open the energy-storage units 210 of balanced circuit units to correspondence to discharge always, but under the control of tdm controller 230, with certain duty ratio, the energy-storage units 210 of the balanced circuit units of unlatching at times to correspondence discharges.
Such as, when there being three energy-storage units 210 to need to be performed equalization operation, balanced circuit units then in this balanced unit 220 corresponding to three energy-storage units 210 is opened in turn, and it respectively accounts for the duty ratio of 1/3 (about 33%), in turn discharges to these three energy-storage units 210.Because each needs the energy-storage units 210 being performed equalization operation to be when performing equalization operation at times, therefore, its euqalizing current is correspondingly reduced to 1/3.That is, in the present invention, when multiple balanced unit 220 performs equalization operation to the energy-storage units 210 of correspondence at times, the sum total of its euqalizing current to be only equal in prior art a balanced unit performs equalization operation euqalizing current to the energy-storage units of correspondence, therefore in the present invention, multiple balanced unit 220 performs equalization operation to the energy-storage units 210 of correspondence at times, and its caloric value does not increase.
In addition, it will be understood by those skilled in the art that, in actual applications, the present invention also can according to the difference of radiating condition, each is needed between the opening time in the balanced loop performed in the balanced unit 220 of equalization operation, be designed to that there is certain overlap, i.e. its duty ratio incomplete by needing the number of balanced unit 220 performing equalization operation to determine.
The present invention also provides a kind of passive type equalization methods, and it comprises the voltage gathering multiple energy-storage units 210, needs to be performed equalization operation with which determining in multiple energy-storage units; And perform the number of energy-storage units 210 of equalization operation as required, and balanced unit 220 corresponding to Time-sharing control and to needing the energy-storage units 210 performing equalization operation to perform equalization operation at times.
Wherein, the voltage of the multiple energy-storage units of above-mentioned collection needs the step being performed equalization operation to comprise with which determining in multiple energy-storage units 210: the voltage gathering each energy-storage units 210 respectively; The voltage of each energy-storage units 210 gathered is compared with balanced starting resistor; When above-mentioned comparative result represents that the voltage of this energy-storage units 210 of collection is greater than described balanced starting resistor, then determine that this energy-storage units 210 needs to be performed equalization operation.
In sum, passive type equalizing circuit of the present invention and corresponding passive type equalization methods can utilize tdm controller and open the balanced circuit units needing to perform in the balanced unit of equalization operation at times, thus at times equalization operation is performed to the energy-storage units of correspondence, therefore in the present invention, the euqalizing current of balanced unit when performing equalization operation that each needs to perform equalization operation can be reduced, thus decrease caloric value, how many energy-storage units then no matter are had to be performed equalization operation, its caloric value can't increase, thus farthest utilize the heat-sinking capability of whole system.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. a passive type equalizing circuit, is characterized in that, comprising:
Multiple energy-storage units, wherein said multiple energy-storage units is cascaded;
Multiple balanced unit, the energy-storage units that each balanced unit is corresponding with one is respectively connected, to gather the voltage of the energy-storage units of described correspondence, thus determine whether to perform equalization operation to the energy-storage units of described correspondence, and when needing to perform equalization operation, equalization operation is performed to the energy-storage units of described correspondence;
Tdm controller, connects described multiple balanced unit, to perform the number of the balanced unit of equalization operation as required, and controls at times describedly to need to perform the balanced unit of equalization operation and perform equalization operation at times to the energy-storage units of described correspondence;
Wherein, each balanced unit comprises respectively:
Balance route unit, connects the energy-storage units of described correspondence, to gather the voltage of the energy-storage units of described correspondence, thus determines whether to perform equalization operation to the energy-storage units of described correspondence;
Balanced circuit units, is parallel to the energy-storage units of described correspondence, during to determine at described Balance route unit to need to perform equalization operation to the energy-storage units of described correspondence, performs equalization operation to the energy-storage units of described correspondence;
Wherein, Balance route unit comprises respectively:
Balanced starting resistor source, the negative electricity being electrically connected the energy-storage units of described correspondence is extreme;
Comparator, it comprises:
First input end, is electrically connected the positive electricity end of the energy-storage units of described correspondence;
Second input, is electrically connected described balanced starting resistor source;
Output, is electrically connected described tdm controller;
Wherein, described comparator gathers the voltage of the energy-storage units of described correspondence, and compares with the balanced starting resistor that described balanced starting resistor source provides, and exports the first corresponding control signal with the output at described comparator.
2. passive type equalizing circuit according to claim 1, is characterized in that, balanced circuit units comprises:
Equalizing resistance;
Switch element, is cascaded with described equalizing resistance, and the described equalizing resistance be cascaded and described switch element are connected in parallel between the extreme and positive electricity end of the negative electricity of the energy-storage units of described correspondence;
Wherein, described switch element receives the second control signal that described tdm controller sends, to determine that whether opening described balanced circuit units performs equalization operation to the energy-storage units of described correspondence.
3. passive type equalizing circuit according to claim 1, is characterized in that, described energy-storage units comprises lithium-ions battery, lithium polymer battery, lead accumulator, nickel-cadmium cell, Ni-MH battery or super capacitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310594784.0A CN103855756B (en) | 2012-11-28 | 2013-11-21 | Passive type equalizing circuit and corresponding passive type equalization methods |
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| CN2012105020248 | 2012-11-28 | ||
| CN201210502024.8 | 2012-11-28 | ||
| CN201210502024 | 2012-11-28 | ||
| CN201310594784.0A CN103855756B (en) | 2012-11-28 | 2013-11-21 | Passive type equalizing circuit and corresponding passive type equalization methods |
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| CN103855756A CN103855756A (en) | 2014-06-11 |
| CN103855756B true CN103855756B (en) | 2016-02-24 |
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| CN201320744569.XU Expired - Lifetime CN203674739U (en) | 2012-11-28 | 2013-11-21 | Passive equalizer circuit |
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| CN109435758B (en) * | 2017-08-31 | 2022-03-18 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic device |
| CN109435777B (en) * | 2017-08-31 | 2021-02-23 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method, and storage medium |
| CN113765199B (en) * | 2021-11-10 | 2022-03-01 | 北京理工大学 | Reconfigurable battery pack capacity utilization maximization control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4168978B2 (en) * | 2004-05-31 | 2008-10-22 | 新神戸電機株式会社 | Battery control circuit |
| CN101764421A (en) * | 2010-01-15 | 2010-06-30 | 中国科学院电工研究所 | Equalizing equipment for battery units of electric automobile |
| CN201868928U (en) * | 2010-12-13 | 2011-06-15 | 中国船舶重工集团公司第七一二研究所 | Charging equalizing judgment and supplement device for energy consumption type battery pack |
| JP2012105533A (en) * | 2010-11-08 | 2012-05-31 | O2 Micro Inc | Battery management systems and methods |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5060857B2 (en) * | 2007-07-19 | 2012-10-31 | 日立ビークルエナジー株式会社 | Cell controller |
| KR101211756B1 (en) * | 2010-02-11 | 2012-12-12 | 삼성에스디아이 주식회사 | Battery Pack |
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- 2013-11-21 CN CN201310594784.0A patent/CN103855756B/en active Active
- 2013-11-21 CN CN201320744569.XU patent/CN203674739U/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4168978B2 (en) * | 2004-05-31 | 2008-10-22 | 新神戸電機株式会社 | Battery control circuit |
| CN101764421A (en) * | 2010-01-15 | 2010-06-30 | 中国科学院电工研究所 | Equalizing equipment for battery units of electric automobile |
| JP2012105533A (en) * | 2010-11-08 | 2012-05-31 | O2 Micro Inc | Battery management systems and methods |
| CN201868928U (en) * | 2010-12-13 | 2011-06-15 | 中国船舶重工集团公司第七一二研究所 | Charging equalizing judgment and supplement device for energy consumption type battery pack |
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| CN103855756A (en) | 2014-06-11 |
| CN203674739U (en) | 2014-06-25 |
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Address after: 523808 room 6, No. 6, No. 3, No. 410, 411, 412, industrial South Road, high and New Technology Industrial Development Zone of Songshan Lake, Guangdong Patentee after: CellWise Microelectronics Co., Ltd. (Dongguan) Address before: 523808 Dongguan, Guangdong Songshan Lake Science and Technology Industrial Park, building 404-409 room Patentee before: CellWise Microelectronics Co., Ltd. (Dongguan) |
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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: 523808 room 410, 411, 412, building 3, no.6, Gongye South Road, Songshanhu high tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: DONGGUAN CELLWISE MICROELECTRONICS Co.,Ltd. |