CN104578310A - Battery set energy balance circuit - Google Patents
Battery set energy balance circuit Download PDFInfo
- Publication number
- CN104578310A CN104578310A CN201510037274.2A CN201510037274A CN104578310A CN 104578310 A CN104578310 A CN 104578310A CN 201510037274 A CN201510037274 A CN 201510037274A CN 104578310 A CN104578310 A CN 104578310A
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- China
- Prior art keywords
- battery
- unit
- balancing
- parallel
- battery unit
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Classifications
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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
- H02J7/0013—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
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a battery set energy balance circuit. The battery set energy balance circuit comprises N battery units which are connected in series, wherein the serial numbers of the battery units range from 1 to N. The two electrodes of each battery unit are each connected with a balance battery with the same serial number as the battery unit in parallel through a first switch. The two ends of each balance battery are connected to the two electrodes of the battery unit corresponding to the balance battery with the serial number larger than the serial number of the balance battery by one in parallel through gating switches till the balance battery with the serial number of N is connected to the two electrodes of the battery unit with the serial number of 1 through gating switches in parallel. Compared with the prior art, the battery set energy balance circuit is simple in design, high in balance capacity and high in running stability and can meet the requirement for large-capacity balance.
Description
[technical field]
The invention belongs to the technical field of battery management system, be specifically related to a kind of battery pack power equalizing circuit.
[background technology]
Stored energy power battery pack generally includes that multiple batteries unit connects mutually, and a batteries unit is formed in parallel by one or more battery cell.Stored energy power battery pack is widely used in the field such as electric automobile and energy-accumulating power station.At present, new-energy automobile is development of automobile focus, and electric automobile is the most important thing more, and the performance of stored energy power battery pack is the key point of restriction Development of Electric Vehicles.
Because fabrication process condition restriction causes there is performance difference between cell, and along with the increase of stored energy power battery set charge/discharge number of times, the difference of the charging and discharging state of cell, temperature, terminal voltage, impedance and aging characteristics etc. in battery pack, make the state of cell possibility different, cause the electricity between battery unit and voltage etc. more unbalanced, therefore, in stored energy power battery pack, the consistency of cell is one of key index judging battery performance quality.The capacity of stored energy power battery pack and carried charge are determined by that the poorest batteries unit, namely " wooden pail effect ".In stored energy power battery pack, generally need application battery equalizing circuit adjusted, to keep the capacity of battery pack, extend the life-span etc. of battery pack.
Chinese patent ZL201120314275.4 discloses a kind of battery module balance circuit, it comprises the battery unit be connected to form by some serial battery, electric capacity, described some batteries are connected with described electric capacity respectively, some groups of single control switch unit, the quantity of described single control switch unit equals the quantity of described battery, often organizes described single control unit correspondence and is connected between a battery and described electric capacity, and master control switch element, described master control switch element is connected between described module and described electric capacity.As can be seen here, this patented technology mainly says that electric capacity carries out the transfer of electric capacity as carrier thus realizes balanced, the weak point of this patented technology is: circuit more complicated, and capacitor discharge stability is inadequate, more seriously cannot realize the equalization requirement of vast capacity.
In view of above drawback, be necessary to provide a kind of battery pack power equalizing circuit to overcome above-mentioned defect in fact.
[summary of the invention]
The object of this invention is to provide a kind of battery pack power equalizing circuit, this battery pack power equalizing circuit ability of equalization is strong, good operation stability and meet the demand of jumbo stored energy power battery pack balancing to a great extent, or even the stored energy power battery pack balancing demand of vast capacity.
To achieve these goals, the present invention adopts following technical scheme: a kind of battery pack power equalizing circuit, it comprises N number of series-connected cell unit that note sequence number is 1 to N, the two poles of the earth of described each battery unit all by the first switch in parallel have one with the balancing battery of this battery unit with sequence number, the two ends of described each balancing battery are also connected in parallel to by gating switch the two poles of the earth of adding the battery unit corresponding to 1 with this balancing battery sequence number until last is that the balancing battery of N is connected in parallel to by gating switch the two poles of the earth that sequence number is the battery unit of 1 by sequence number.
Preferably, also comprise detecting unit, described detecting unit for detecting the terminal voltage of described battery unit, and sends folding control signal to described gating switch.
Preferably, during initial conditions, described first switch is closure state, described gating switch is off-state, when detecting unit detects high and minimum two battery unit of terminal voltage, the folding condition of the first switch and gating switch guarantees the two ends of the battery unit that terminal voltage is the highest balancing battery not in parallel, two ends two balancing batteries in parallel of the battery unit that terminal voltage is minimum.
Compared with prior art, battery pack power equalizing circuit simplicity of design of the present invention, the ability of equalization is strong, good operation stability, and the demand that can adapt to jumbo equilibrium.
[accompanying drawing explanation]
Fig. 1 is the circuit diagram of any 4 series-connected cell unit in battery pack power equalizing circuit of the present invention;
Fig. 2 is the circuit diagram when unit of series-connected cell shown in Fig. 1 does not open equalizing system;
Fig. 3 for the first battery unit electricity in the unit of series-connected cell shown in Fig. 1 the highest, circuit diagram when the 3rd battery unit electricity is minimum;
Fig. 4 for the second battery unit electricity in the unit of series-connected cell shown in Fig. 1 the highest, circuit diagram when the 4th battery unit electricity is minimum;
Fig. 5 is the schematic diagram of the equalizing system of battery pack power equalizing circuit of the present invention.
[embodiment]
Please refer to shown in Fig. 1 to Fig. 5, a kind of battery pack power equalizing circuit of the present invention, it comprises N number of series-connected cell unit that note sequence number is 1 to N, the two poles of the earth of described each battery unit all by the first switch in parallel have one with the balancing battery of this battery unit with sequence number, the two ends of described each balancing battery are also connected in parallel to by gating switch the two poles of the earth of adding the battery unit corresponding to 1 with this balancing battery sequence number until last is that the balancing battery of N is connected in parallel to by gating switch the two poles of the earth that sequence number is the battery unit of 1 by sequence number.
Shown in Fig. 1, when not needing equilibrium, by gating switch, balancing battery is connected in parallel on corresponding battery unit.When opening balanced, by gating switch balancing battery in parallel for battery unit the highest for electricity moved on on rear stage battery unit and work, until the stopping of the balancing battery corresponding to the battery unit movement that electricity is minimum, the battery unit that such electricity is minimum just has two balancing batteries to supplement capacity, and the battery unit that electricity is the highest does not have balancing battery in parallel.
Take time-multiplexed control gimmick to control balancing battery want position in parallel, make it each group battery unit electricity more balanced and control equalizing circuit more stable.Use this kind of equalization methods can fast uniform, its scope be zero to the balancing battery electricity of twice, especially suitable jumbo battery unit, and the electricity that its loss is very low.
Equalizing system control logic: first, detect the terminal voltage of each battery unit, judge whether the pressure reduction between each element cell exceeds standard, if exceed, then open Balance route, by gating switch, balancing battery in parallel for battery pack the highest for voltage is moved on to the work of rear stage battery pack, until the stopping of the balancing battery corresponding to the battery unit movement that voltage is minimum, after these complete, again detect each battery cell voltage.If do not exceeded, then judge whether the change of each cell voltage is consistent again.If change in voltage is consistent, then returns and detect each battery cell voltage; If inconsistent, open equilibrium, by gating switch, battery unit balancing battery in parallel the slowest for change in voltage is moved on to the work of rear stage battery unit, until the stopping of the balancing battery corresponding to the battery unit movement that change in voltage is the fastest, return after completing and detect each battery cell voltage.
For the battery unit of four joint series connection, being: when not needing equilibrium to this equalization methods specific descriptions, being connected in parallel on corresponding battery unit by gating switch by balancing battery, formed shown in circuit diagram 2, the arrow head part of Fig. 2 represents that switch closes.Operationally, find that first segment battery unit electricity is the highest, the 3rd batteries electricity unit is minimum, need open equilibrium.A batteries unit is in parallel backward to make first segment and second section balancing battery by gating switch, section three, and Section of four balancing battery are connected in parallel on corresponding battery unit, then first segment battery unit declines because lose balancing battery electricity, 3rd batteries unit has had more the then electricity increase of a balancing battery, just formed shown in circuit diagram 3, the arrow head part of Fig. 3 represents that switch closes.Run a period of time again, find that second section battery electric quantity is the highest, the 4th batteries electricity is minimum, in like manner, the highest circuit of second section battery unit declines because lose balancing battery electricity, and the 4th batteries unit has had more the then electricity increase of a balancing battery, then form the connected mode as Fig. 4.
The balancing battery that the present invention uses is the battery identical with battery unit, and the capacity general recommendations of balancing battery is 3% to 8% of battery unit, and the capacity that specifically arranges needs reference product characteristic and the market demand to carry out determined value.
Battery pack power equalizing circuit of the present invention, be not restricted to described in specification and execution mode, therefore additional advantage and amendment can easily be realized for the personnel of familiar field, therefore when not deviating from the spirit and scope of the universal that claim and equivalency range limit, the present invention is not limited to specific details, representational equipment and illustrates here and the examples shown described.
Claims (3)
1. a battery pack power equalizing circuit, it is characterized in that: comprise N number of series-connected cell unit that note sequence number is 1 to N, the two poles of the earth of described each battery unit all by the first switch in parallel have one with the balancing battery of this battery unit with sequence number, the two ends of described each balancing battery are also connected in parallel to by gating switch the two poles of the earth of adding the battery unit corresponding to 1 with this balancing battery sequence number until last is that the balancing battery of N is connected in parallel to by gating switch the two poles of the earth that sequence number is the battery unit of 1 by sequence number.
2. circuit of battery pack balancing as claimed in claim 1, is characterized in that: also comprise detecting unit, and described detecting unit for detecting the terminal voltage of described battery unit, and sends folding control signal to described gating switch.
3. circuit of battery pack balancing as claimed in claim 2, it is characterized in that: during initial conditions, described first switch is closure state, described gating switch is off-state, when detecting unit detects high and minimum two battery unit of terminal voltage, the folding condition of the first switch and gating switch guarantees the two ends of the battery unit that terminal voltage is the highest balancing battery not in parallel, two ends two balancing batteries in parallel of the battery unit that terminal voltage is minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510037274.2A CN104578310A (en) | 2015-01-23 | 2015-01-23 | Battery set energy balance circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510037274.2A CN104578310A (en) | 2015-01-23 | 2015-01-23 | Battery set energy balance circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104578310A true CN104578310A (en) | 2015-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510037274.2A Pending CN104578310A (en) | 2015-01-23 | 2015-01-23 | Battery set energy balance circuit |
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| Country | Link |
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| CN (1) | CN104578310A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882642A (en) * | 2015-05-22 | 2015-09-02 | 武汉巨能集群科技有限公司 | Automobile-used lithium battery module beneficial to realize non-energy-consumption-type electric quantity balance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263364A (en) * | 1999-02-12 | 2000-08-16 | 吴世侊 | Control system of chargeable battery and its control method |
| CN1825676A (en) * | 2005-02-25 | 2006-08-30 | 松下电器产业株式会社 | Battery pack |
| CN102376989A (en) * | 2010-08-13 | 2012-03-14 | 周金平 | Serially-connected battery pack of lithium ion power battery with automatic equalization of charging and discharging |
| CN202206153U (en) * | 2011-08-25 | 2012-04-25 | 上海新进芯微电子有限公司 | Battery module balance circuit |
| CN203352230U (en) * | 2013-07-04 | 2013-12-18 | 山东大学 | Zero current switching active equalization circuit of power battery |
| JP2014176244A (en) * | 2013-03-12 | 2014-09-22 | Mitsubishi Electric Corp | Cell balancing circuit |
-
2015
- 2015-01-23 CN CN201510037274.2A patent/CN104578310A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263364A (en) * | 1999-02-12 | 2000-08-16 | 吴世侊 | Control system of chargeable battery and its control method |
| CN1825676A (en) * | 2005-02-25 | 2006-08-30 | 松下电器产业株式会社 | Battery pack |
| CN100514744C (en) * | 2005-02-25 | 2009-07-15 | 松下电器产业株式会社 | Battery pack |
| CN102376989A (en) * | 2010-08-13 | 2012-03-14 | 周金平 | Serially-connected battery pack of lithium ion power battery with automatic equalization of charging and discharging |
| CN202206153U (en) * | 2011-08-25 | 2012-04-25 | 上海新进芯微电子有限公司 | Battery module balance circuit |
| JP2014176244A (en) * | 2013-03-12 | 2014-09-22 | Mitsubishi Electric Corp | Cell balancing circuit |
| CN203352230U (en) * | 2013-07-04 | 2013-12-18 | 山东大学 | Zero current switching active equalization circuit of power battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882642A (en) * | 2015-05-22 | 2015-09-02 | 武汉巨能集群科技有限公司 | Automobile-used lithium battery module beneficial to realize non-energy-consumption-type electric quantity balance |
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Application publication date: 20150429 |