CN106026333A - Cascaded capacitor equalizing charge method for power batteries - Google Patents
Cascaded capacitor equalizing charge method for power batteries Download PDFInfo
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- CN106026333A CN106026333A CN201610469101.2A CN201610469101A CN106026333A CN 106026333 A CN106026333 A CN 106026333A CN 201610469101 A CN201610469101 A CN 201610469101A CN 106026333 A CN106026333 A CN 106026333A
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- Prior art keywords
- equilibrium
- electric capacity
- lithium battery
- forth
- way switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a cascaded capacitor equalizing charge method for power batteries. The cascaded capacitor equalizing charge method comprises a charging main circuit and a plurality of lithium battery cells, wherein the plurality of lithium battery cells are arranged between a positive electrode and a negative electrode of the charging main circuit in series; any two adjacent lithium battery cells form an equalizing basic unit; each equalizing basic unit is provided with a shuttle equalizing capacitor; a positive two-way change-over switch is arranged at a positive end of each shuttle equalizing capacitor; a negative two-way change-over switch is arranged at a negative end of each shuttle equalizing capacitor; each positive two-way change-over switch alternately communicates with the positive electrode and the negative electrode of each lithium battery cell in the upstream of current in each equalizing basic unit; and the negative two-way change-over switch of each shuttle equalizing capacitor alternately communicates with the positive electrode and the negative electrode of each lithium battery cell in the downstream of the current in each equalizing basic unit. According to the cascaded capacitor equalizing charge method, the fast capacity equalizing operation when a power battery pack is charged can be achieved.
Description
Technical field
The present invention relates to new forms of energy dynamic lithium battery technical field, particularly a kind of electrokinetic cell cascade electric capacity balanced charging method.
Background technology
New forms of energy refer to that just starting outside traditional energy develops or the most actively study, needs the various energy forms promoted; new forms of energy can effectively cope with the problem such as oil crisis and environmental pollution, the most such as: solar energy, geothermal energy, wind energy, ocean energy, biomass energy and nuclear fusion energy etc.；The memory transfer of new forms of energy utilize be the key link that new forms of energy are promoted also be the technical barrier of emphasis public relations, the storage of new forms of energy is main is converted into the forms such as chemical energy, potential energy, kinetic energy, electromagnetic energy by certain technology by new forms of energy, make the energy after conversion have the most transferable or feature of time upper transferable or quality controllable system, can discharge in a suitable manner in reasonable time, place.The most most commonly seen energy storage mode is battery energy storage, but still awaits developing further for its power energy storage battery technology providing new forms of energy for high energy consumption, powerful power-equipment.
Lithium ion power storage battery, as a kind of environmental protection battery, has the advantages such as high-energy-density, high working voltage, high safety performance and long life, therefore demonstrates superior prospect in terms of the new forms of energy energy storage such as portable electric appts, electric automobile.In order to enable series battery to reach the capacity utilization of maximum, reducing the probability of battery excessive pressure damages simultaneously as far as possible, extend the service life of set of cells, we must carry out capacity equilibrium to the battery unit in series battery.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of electrokinetic cell cascade electric capacity balanced charging method.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of electrokinetic cell cascade electric capacity balanced charging method, including cascade electric capacity equalizing charge system, described cascade electric capacity equalizing charge system includes charge main circuit and several lithium battery monomers, several described lithium battery monomers are serially connected between the both positive and negative polarity being arranged at described charging main circuit, two described lithium battery monomers of arbitrary neighborhood constitute an equilibrium elementary cell, each described equilibrium elementary cell is provided with the equilibrium electric capacity that shuttles back and forth, the positive terminal of equilibrium electric capacity of shuttling back and forth described in each is provided with positive pole two-way switching switch, the negative pole end of equilibrium electric capacity of shuttling back and forth described in each is provided with negative pole two-way switching switch；And comprise the following steps:
Step one, each described in the shuttle back and forth described positive pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the positive pole of the described lithium battery monomer in current upstream direction in described equilibrium elementary cell, each described in the shuttle back and forth described negative pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the positive pole of the described lithium battery monomer of electric current downstream direction in described equilibrium elementary cell；
Step 2, each described in the shuttle back and forth described positive pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the negative pole of the described lithium battery monomer in current upstream direction in described equilibrium elementary cell, each described in the shuttle back and forth described negative pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the negative pole of the described lithium battery monomer of electric current downstream direction in described equilibrium elementary cell；
Described step one and described step 2 are alternately repeated and carry out.
Further improvement as technique scheme, capacity to described lithium battery monomer detects and calculates the average size of several described lithium battery monomers before charging, will be less than the described lithium battery monomer of average size and replaces between the interspersed both positive and negative polarity being connected on described charging main circuit higher than the described lithium battery monomer of average size.The meaning alternately interted is so that each adjacent both sides being less than the described lithium battery monomer of average size is the described lithium battery monomer higher than average size, makes each adjacent both sides being higher than the described lithium battery monomer of average size be the described lithium battery monomer less than average size.
Further improvement as technique scheme, several described lithium battery monomers are divided into multiple electrokinetic cell to be grouped, described lithium battery amount of monomer contained in the packet of each described electrokinetic cell is identical, two described electrokinetic cell packets of arbitrary neighborhood constitute an equilibrium group unit, each described equilibrium group unit is provided with the equilibrium group electric capacity that shuttles back and forth, the positive terminal of equilibrium group electric capacity of shuttling back and forth described in each is provided with a positive pole two-way switching switch, each described in the shuttle back and forth negative pole end of equilibrium group electric capacity be provided with a negative pole two-way switching switch；And comprise the following steps:
Step one, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described positive pole switch be turned on being positioned at current upstream direction in described equilibrium group unit described electrokinetic cell packet positive pole, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described negative pole switch be turned on being positioned at electric current downstream direction in described equilibrium group unit described electrokinetic cell packet positive pole；
Step 2, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described positive pole switch be turned on being positioned at current upstream direction in described equilibrium group unit described electrokinetic cell packet negative pole, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described negative pole switch be turned on being positioned at electric current downstream direction in described equilibrium group unit described electrokinetic cell packet negative pole；
Described step one and described step 2 are alternately repeated and carry out.
Compared with prior art, the invention has the beneficial effects as follows:
A kind of electrokinetic cell cascade electric capacity balanced charging method provided by the present invention, the switching repeatedly switched by two-way switching, make adjacent two electrokinetic cell packets or lithium battery monomer capacity consistent, the capacity finally making all lithium battery monomers is consistent, and the shuttle back and forth balancing speed of equalizing circuit of above-mentioned cascade electric capacity is fast, the time of consuming is shorter.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is cascade electric capacity equalizing charge system structural representation of the present invention；
Fig. 2 is the structural representation of electrokinetic cell of the present invention packet.
Detailed description of the invention
It is the structural representation of one specific embodiment of the present invention referring to figs. 1 through Fig. 2, Fig. 1 to Fig. 2.
As shown in Figure 1 to Figure 2, a kind of electrokinetic cell cascade electric capacity balanced charging method, including cascade electric capacity equalizing charge system, described cascade electric capacity equalizing charge system includes charge main circuit U and 16 lithium battery monomers, and 16 described lithium battery monomers are serially connected between the both positive and negative polarity being arranged at described charging main circuit U；Particularly preferably, capacity to described lithium battery monomer detects and calculates the average size of 16 described lithium battery monomers before charging, will be less than the described lithium battery monomer of average size and replaces between the interspersed both positive and negative polarity being connected on described charging main circuit U higher than the described lithium battery monomer of average size.The meaning alternately interted is so that each adjacent both sides being less than the described lithium battery monomer of average size is the described lithium battery monomer higher than average size, makes each adjacent both sides being higher than the described lithium battery monomer of average size be the described lithium battery monomer less than average size.
Two described lithium battery monomers of arbitrary neighborhood constitute an equilibrium elementary cell, each described equilibrium elementary cell is provided with the equilibrium electric capacity that shuttles back and forth, the positive terminal of equilibrium electric capacity of shuttling back and forth described in each is provided with positive pole two-way switching switch, each described in the shuttle back and forth negative pole end of equilibrium electric capacity be provided with a negative pole two-way switching switch；And comprise the following steps:
Step one, each described in the shuttle back and forth described positive pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the positive pole of the described lithium battery monomer in current upstream direction in described equilibrium elementary cell, each described in the shuttle back and forth described negative pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the positive pole of the described lithium battery monomer of electric current downstream direction in described equilibrium elementary cell；
Step 2, each described in the shuttle back and forth described positive pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the negative pole of the described lithium battery monomer in current upstream direction in described equilibrium elementary cell, each described in the shuttle back and forth described negative pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the negative pole of the described lithium battery monomer of electric current downstream direction in described equilibrium elementary cell；
Described step one and described step 2 are alternately repeated and carry out.
Further, 16 described lithium battery monomers are divided into four electrokinetic cell packet G1-1, G1-2, G1-3 and G1-4, described lithium battery amount of monomer contained in the packet of each described electrokinetic cell is identical, two described electrokinetic cell packets of arbitrary neighborhood constitute an equilibrium group unit, each described equilibrium group unit is provided with the equilibrium group electric capacity C1-1 that shuttles back and forth, C1-2 or C1-3, the positive terminal of equilibrium group electric capacity of shuttling back and forth described in each is provided with a positive pole two-way switching switch S1-1, S1-2 or S1-3, the negative pole end of equilibrium group electric capacity of shuttling back and forth described in each is provided with a negative pole two-way switching switch S1-2, S1-3 or S1-4；And comprise the following steps:
Step one, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described positive pole switch be turned on being positioned at current upstream direction in described equilibrium group unit described electrokinetic cell packet positive pole, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described negative pole switch be turned on being positioned at electric current downstream direction in described equilibrium group unit described electrokinetic cell packet positive pole；
Step 2, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described positive pole switch be turned on being positioned at current upstream direction in described equilibrium group unit described electrokinetic cell packet negative pole, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described negative pole switch be turned on being positioned at electric current downstream direction in described equilibrium group unit described electrokinetic cell packet negative pole；
Described step one and described step 2 are alternately repeated and carry out.
As a example by four described lithium battery monomer G0-1, G0-2, G0-3 in any one electrokinetic cell is grouped and G0-4: when two-way switching switch S0-1, S0-2, S0-3 connect the positive pole of lithium battery monomer G0-1, G0-2, G0-3 and G0-4 of being serially connected with S0-4, equilibrium electric capacity C0-1, C0-2 or C0-3 voltage that shuttles back and forth is equal with lithium battery monomer G0-1, G0-2, G0-3 respectively；When two-way switching switch S0-1, S0-2, S0-3 connect the negative pole of four lithium battery monomer G0-1, G0-2, G0-3 and G0-4 being serially connected with S0-4, equilibrium electric capacity C0-1, C0-2 or C0-3 voltage that shuttles back and forth is equal with lithium battery monomer G0-2, G0-3, G0-4 respectively；The change of equilibrium electric capacity C0-1, C0-2 or C0-3 voltage of shuttling back and forth can produce absorption or the release of electric energy, so that the capacity of lithium battery monomer G0-1, G0-2, G0-3 and G0-4 reaches unanimity；Then similar principle, makes the capacity of four electrokinetic cells packet G1-1, G1-2, G1-3 and G1-4 reach unanimity, thus accelerates the speed of the capacity equilibrium of the lithium battery monomer in the packet of all electrokinetic cells.
In like manner, if the quantity of lithium battery monomer increases further, it is also possible to the packet of multiple described electrokinetic cells is further grouped, thus improves power battery pack at rechargeable balancing speed.
Preferably enforcement to the present invention is illustrated above; certainly; the present invention can be to use form different from the embodiment described above; those of ordinary skill in the art in the conversion of the equivalent made on the premise of spirit of the present invention or change accordingly, all should belong in protection scope of the present invention.
Claims (3)
1. an electrokinetic cell cascade electric capacity balanced charging method, it is characterized in that: include cascading electric capacity equalizing charge system, described cascade electric capacity equalizing charge system includes charge main circuit and several lithium battery monomers, several described lithium battery monomers are serially connected between the both positive and negative polarity being arranged at described charging main circuit, two described lithium battery monomers of arbitrary neighborhood constitute an equilibrium elementary cell, each described equilibrium elementary cell is provided with the equilibrium electric capacity that shuttles back and forth, the positive terminal of equilibrium electric capacity of shuttling back and forth described in each is provided with positive pole two-way switching switch, the negative pole end of equilibrium electric capacity of shuttling back and forth described in each is provided with negative pole two-way switching switch；And comprise the following steps:
Step one, each described in the shuttle back and forth described positive pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the positive pole of the described lithium battery monomer in current upstream direction in described equilibrium elementary cell, each described in the shuttle back and forth described negative pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the positive pole of the described lithium battery monomer of electric current downstream direction in described equilibrium elementary cell；
Step 2, each described in the shuttle back and forth described positive pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the negative pole of the described lithium battery monomer in current upstream direction in described equilibrium elementary cell, each described in the shuttle back and forth described negative pole two-way switching switch of equilibrium electric capacity be turned on being positioned at the negative pole of the described lithium battery monomer of electric current downstream direction in described equilibrium elementary cell；
Described step one and described step 2 are alternately repeated and carry out.
A kind of electrokinetic cell cascade electric capacity balanced charging method the most according to claim 1, it is characterized in that: the capacity to described lithium battery monomer detects and calculate the average size of several described lithium battery monomers before charging, will be less than the described lithium battery monomer of average size and replace between the interspersed both positive and negative polarity being connected on described charging main circuit higher than the described lithium battery monomer of average size.
A kind of electrokinetic cell cascade electric capacity balanced charging method the most according to claim 1 and 2, it is characterized in that: several described lithium battery monomers are divided into multiple electrokinetic cell to be grouped, described lithium battery amount of monomer contained in the packet of each described electrokinetic cell is identical, two described electrokinetic cell packets of arbitrary neighborhood constitute an equilibrium group unit, each described equilibrium group unit is provided with the equilibrium group electric capacity that shuttles back and forth, the positive terminal of equilibrium group electric capacity of shuttling back and forth described in each is provided with a positive pole two-way switching switch, the negative pole end of equilibrium group electric capacity of shuttling back and forth described in each is provided with a negative pole two-way switching switch；And comprise the following steps:
Step one, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described positive pole switch be turned on being positioned at current upstream direction in described equilibrium group unit described electrokinetic cell packet positive pole, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described negative pole switch be turned on being positioned at electric current downstream direction in described equilibrium group unit described electrokinetic cell packet positive pole；
Step 2, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described positive pole switch be turned on being positioned at current upstream direction in described equilibrium group unit described electrokinetic cell packet negative pole, each described in shuttle back and forth equilibrium group electric capacity the two-way switching of described negative pole switch be turned on being positioned at electric current downstream direction in described equilibrium group unit described electrokinetic cell packet negative pole；
Described step one and described step 2 are alternately repeated and carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610469101.2A CN106026333A (en) | 2016-06-25 | 2016-06-25 | Cascaded capacitor equalizing charge method for power batteries |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610469101.2A CN106026333A (en) | 2016-06-25 | 2016-06-25 | Cascaded capacitor equalizing charge method for power batteries |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786989A (en) * | 2017-02-14 | 2017-05-31 | 广西师范大学 | A kind of dynamic lithium battery equalization methods and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1901389A2 (en) * | 2006-09-15 | 2008-03-19 | Kabushiki Kaisha Toshiba | Power supply system and motor car |
| CN205693407U (en) * | 2016-06-23 | 2016-11-16 | 芜湖格利特新能源科技有限公司 | A kind of lithium battery cascade electric capacity shuttles back and forth equalizing circuit |
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2016
- 2016-06-25 CN CN201610469101.2A patent/CN106026333A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1901389A2 (en) * | 2006-09-15 | 2008-03-19 | Kabushiki Kaisha Toshiba | Power supply system and motor car |
| CN205693407U (en) * | 2016-06-23 | 2016-11-16 | 芜湖格利特新能源科技有限公司 | A kind of lithium battery cascade electric capacity shuttles back and forth equalizing circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786989A (en) * | 2017-02-14 | 2017-05-31 | 广西师范大学 | A kind of dynamic lithium battery equalization methods and device |
| CN106786989B (en) * | 2017-02-14 | 2023-03-14 | 广西师范大学 | Power lithium battery equalization method and device |
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