CN107187334A - Series battery voltage balanced management system, series battery and its control method - Google Patents
Series battery voltage balanced management system, series battery and its control method Download PDFInfo
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- CN107187334A CN107187334A CN201710621442.1A CN201710621442A CN107187334A CN 107187334 A CN107187334 A CN 107187334A CN 201710621442 A CN201710621442 A CN 201710621442A CN 107187334 A CN107187334 A CN 107187334A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims description 14
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000007726 management method Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- BPKGOZPBGXJDEP-UHFFFAOYSA-N [C].[Zn] Chemical compound [C].[Zn] BPKGOZPBGXJDEP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
Series battery voltage balanced management system, multiple single batteries applied to cascade, including multiple voltage check devices and digital signal processing device, each single anode is connected with a voltage check device input, the detection means output signal is data signal, the output end of each voltage check device is connected with digital signal processing device, and the series battery also includes a switching network and voltage boosting device；Each single anode connecting valve network, the switching network is also connected with the voltage input end and voltage output end of voltage boosting device；Each switch control connection of the digital signal processing device and switching network.The invention also discloses a kind of series battery and its control method.The present invention realizes the balanced management of each single cell voltage to series battery using switching network, and rapid dynamic response speed, the electric voltage equalization time is short, effectively increases battery.
Description
Technical field
The invention belongs to electronic power supply field, it is related to a kind of battery management technique, and in particular to a kind of series battery electricity
Press balanced management system, series battery and its control method.
Background technology
Miniaturization and energy ratio with battery are improved constantly, and are occurred in that various by battery powered electrical equipment, example
Such as unmanned plane, electric automobile, battery truck, by taking electric automobile as an example, electric automobile refers to, using vehicle power as power, use motor
Driving moment is travelled, and meets road traffic, the vehicle of security legislation requirements.Due to the relatively conventional automobile of effect on environment compared with
Small, its prospect is had an optimistic view of extensively.The length of the mileages of continuation of electric automobile depends on the size of vehicle mounted dynamic battery capacity, vehicle-mounted
The weight of electrokinetic cell depend on select which kind of electrokinetic cell such as plumbic acid, zinc carbon, lithium battery etc., and battery proportion, compare work(
The indexs such as rate, specific energy.
But during battery use, due to the difference for the cell output voltage that commercial process is caused, cause electricity
Pond power output is uneven, and in use, this species diversity can persistently be amplified due to the discharge principle of battery, such as right
In the battery of output voltage, output current is larger, and output current causes battery-heating to increase greatly, causes internal resistance to be dropped after battery-heating
It is low, electric current increase is further resulted in, positive feedback is formed and make it that battery last is generated heat and excess load is powered, battery life significantly contracts
It is small.
In the prior art, using one hindrance of each cell parallel and the place of voltage detector with series battery
Reason mode, when detect cell voltage it is too high when, then hindrance is incorporated to circuit so that cell parallel resistance decline, voltage
Reduction, all consumption is in hindrance for unnecessary power consumption, and this processing mode is to battery power consumption increase, and response speed is slow,
And require high for voltage detector accuracy of detection, improve product cost.
The content of the invention
To overcome the technological deficiency that prior art is present, the invention discloses a kind of series battery voltage balanced management system
System, series battery and its control method.
Series battery voltage balanced management system of the present invention, applied to multiple single batteries of cascade, bag
Include multiple voltage check devices and digital signal processing device, each single anode and a voltage check device input
Connection, the detection means output signal is data signal, and output end and the Digital Signal Processing of each voltage check device are filled
Connection is put, the series battery also includes a switching network and voltage boosting device；Each single anode connects
Switching network is connect, the switching network is also connected with the voltage input end and voltage output end of voltage boosting device；
The switching network can be switched by switching, and select the positive pole of any one single battery and the electricity of voltage boosting device
Press input or voltage output end connection；Each switch control connection, institute of the digital signal processing device and switching network
State digital signal processing device and possess following function：The data signal inputted according to voltage check device, detects positive and negative extreme pressure
The minimum and maximum single battery of difference.
It is preferred that, the voltage boosting device is for BOOST boost configurations circuit or including one-level BOOST boost configuration circuits
Two-stage booster circuit.
It is preferred that, the switching network includes the multiple equalizer switches for connecting each single anode respectively, described equal
The other end of weighing apparatus switch is connected with voltage switching end；Voltage input end and the voltage output end difference of the voltage boosting device
It is connected by low tension switch and high-voltage switch gear with voltage switching end.
It is preferred that, the switching network includes the multiple input switches for connecting each single anode respectively, described defeated
The other end for entering switch is connected with the voltage input end of voltage boosting device, and the switching network also includes connecting each respectively
Multiple output switchs of single anode, the other end of the output switch connects with the voltage output end of voltage boosting device
Connect.
It is preferred that, the digital signal processing device is built-in with clock generator.
The invention also discloses a kind of series battery, the balanced management system described in as above any one is employed.
The invention also discloses a kind of series battery control method, based on the balanced management system described in as above any one
System, the data signal that digital signal processing device is inputted according to voltage check device, detect immediately both positive and negative polarity pressure difference it is maximum and
Minimum single battery, using the control of switching network, makes the electricity of the maximum single anode of pressure difference and voltage boosting device
Press input connection, the voltage output end connection of the minimum single anode of pressure difference and voltage boosting device.
Specifically, based on the balanced management system described in second of preferred embodiment as previously described, digital signal processing device
Detect after the minimum and maximum single battery of both positive and negative polarity pressure difference, elder generation is only by balanced the opening with the maximum single battery connection of pressure difference
Close and low tension switch closes a setting duration, then the equalizer switch and high-voltage switch gear being only connected with the minimum single battery of pressure difference
One setting duration of closure.
Specifically, based on the balanced management system described in the third preferred embodiment as previously described, digital signal processing device
After detecting the minimum and maximum single battery of both positive and negative polarity pressure difference, the input switch that will be only connected with the maximum single battery of pressure difference
Closed with the output switch being connected with the minimum single battery of pressure difference.
Specifically, based on the balanced management system described in the 4th kind of preferred embodiment as previously described, the Digital Signal Processing
The switching that device judges for the identification of data signal and each is switched, each week of the clock signal produced in clock generator
Phase, edge started synchronous progress.
Using series battery voltage balanced management system of the present invention, series battery and its control method, tool
There is following superiority：
One, realizes the balanced management of each single cell voltage to series battery, dynamic responding speed using switching network
It hurry up, using multiplexing, time-multiplexed instant control mode makes cell voltage balanced at any time, effectively increases battery and use
Life-span.
Two, high-voltage battery energy are collected for supplementing low-voltage battery, improve battery utilization ratio, extend electricity
Pond single charge use time.
Three, lift charging voltage using increasing apparatus, effectively shorten time for balance, portfolio effect is greatly improved, can be with
Realize the equilibrium between completion high-low pressure voltage within a very short time.
All single battery only needs to use a Battery pack increasing apparatus four, while to the accuracy of detection of voltage check device
It is required that being greatly reduced, balanced management hardware cost is reduced.
Brief description of the drawings
Fig. 1 is a kind of embodiment structural representation of series battery voltage balanced management system of the present invention
Figure, Fig. 2 is another embodiment structural representation of series battery voltage balanced management system of the present invention, figure
The middle entitled ADC- analog-digital converters of reference, DSP- digital signal processing devices, VO- feeder ears, VUP- voltage increases dress
Put, VG- voltage switchings end, K- equalizer switches, K1- input switches, K2- output switchs, KL- low tension switches, KH- high-voltage switch gears,
C1, C2, C3, C4 represent only different single batteries.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment to the present invention is described in further detail.
Series battery voltage balanced management system of the present invention, applied to multiple single batteries of cascade, bag
Multiple voltage check devices and digital signal processing device DSP are included, each single anode and a voltage check device are defeated
Enter end connection, the detection means output signal is at data signal, the output end and data signal of each voltage check device
Device connection is managed, the series battery also includes a switching network and voltage boosting device VUP；Each single battery
Positive pole connecting valve network, the switching network is also connected with the voltage input end and voltage output end of voltage boosting device；
The switching network can be switched by switching, and select the positive pole of any one single battery and the electricity of voltage boosting device
Press input or voltage output end connection；Each switch control connection, institute of the digital signal processing device and switching network
State digital signal processing device and possess following function：The data signal inputted according to voltage check device, detects positive and negative extreme pressure
The minimum and maximum single battery of difference.
As shown in figure 1, providing in a series-connected cell application mode based on four single batteries, Fig. 1, using analog-to-digital conversion
Four single battery C1, C2, C3, C4 cathode voltage analog signal are converted into digital letter by device ADC as voltage check device
Number digital signal processing device is input to, it can be seen from figure 1 that the cathode voltage of C2, C3, C4 battery is also C1, C2, C3 negative electricity
Pressure, digital signal processing device is according to the data signal received, it is easy to calculate the difference between each anode voltage,
So as to obtain the instant output voltage of each single battery, and compare the single battery for selecting highest and minimum pressure difference.
Digital signal processing device controlling switch network, makes the voltage of the single battery of highest pressure difference and voltage boosting device defeated
Enter end connection, by the use of the single anode of highest pressure difference as input power booster tension, with the electricity after lifting after booster tension
Pressure charges to the single battery of minimum pressure difference, and realization makes up low pressure difference battery with high-tension battery electricity.
Fig. 1 and Fig. 2 sets forth in two kinds of embodiments of switching network, the embodiment shown in Fig. 1,
Switching network includes connecting multiple equalizer switch K of each single anode respectively, the other end of the equalizer switch with
Voltage switching end is connected；The voltage input end and voltage output end of the voltage boosting device pass through low tension switch KL and height respectively
The KH that compresses switch is connected with voltage switching end VG.
Assuming that digital signal detector detects single battery C1 pressure difference highests, single battery C3 pressure differences are minimum, then first
The equalizer switch and low tension switch being connected with C1 are first closed, other switches disconnect, form C1 positive poles to voltage boosting device electricity
The path of input is pressed, charging pressure-boosting operation is carried out, then closes the equalizer switch and high-voltage switch gear being connected with C3, other switches
Disconnect, form the path that C3 positive poles arrive voltage boosting device voltage output end, progress discharge operation, using exporting high pressure to list
One battery C3 positive poles are charged, and complete electric voltage equalization.Closed high switchs the time with low tension switch according to preset value
Determine, typically in microsecond rank.
In the prior art, realize that boost in voltage has the ripe framework such as BOOST, BUCK-BOOST, charge pump, it is contemplated that this hair
Bright middle boost in voltage may need to reach rank nearly a hundred times, it is preferred to use BOOST boost configurations, or using two-stage boost configuration,
For example first with charge pump boosting once, then with BOOST structures lifting voltage again, realize that high power is boosted.
The number of switches that switching network embodiment shown in Fig. 1 is used is less, but needs timesharing to enter charging and discharging
OK, response speed is slower；Switching network embodiment shown in Fig. 2 can improve response speed.
In embodiment shown in Fig. 2, the switching network includes connecting many of each single anode respectively
Individual input switch K1, the other end of the input switch is connected with the voltage input end of voltage boosting device, the switch net
Network also includes connecting multiple output switch K2 of each single anode respectively, and the other end of the output switch is and voltage
Lifting device VUP voltage output end connection.
It is still assumed that digital signal detector detects single battery C1 pressure difference highests, single battery C3 pressure differences are minimum,
After digital signal processing device is detected, the control input switch being connected with C1 and the output switch closure being connected with C3, other
Switch disconnects, formation C1 positive poles to the path and C3 positive poles of voltage boosting device voltage input end to voltage boosting device voltage
The path of output end, voltage boosting device is with C1 just extremely charge power supply booster tensions, voltage output after lifting to C3 positive poles
Charging, completes electric voltage equalization；Embodiment shown in Fig. 2, can immediately carry out for switch switching and battery selection, carries
High response speed.
Battery voltage detector can also take more multi-part in addition to ADC, for example, first will detect electricity with operational amplifier
Pressure signal is sampled with inputting ADC again after an a reference value error amplification, or one current sampling resistor of series connection on battery,
By characterizing cell voltage to sampling resistor two ends pressure differential detection；Because each single battery of actual use is all demarcation performance
Identical battery, the difference between cell output voltage and electric current is not too large, and the absolute value of detection cell voltage in itself has no
Too big meaning, but be due to the presence of difference, it may still result in the drastically shortening of battery life, therefore the effect of detection means
The digital value of battery voltage value can be characterized by mainly detecting one, so as to pick out voltage highest and two minimum lists of voltage
One battery.
In the present invention, due to the voltage difference being only concerned between single battery, and dynamic equilibrium is used so that ADC is examined
The requirement for surveying precision is greatly reduced, even if ADC detections have error, the error is also offset by mathematic interpolation, and due to dynamic
State balance mode so that ADC detection error hardly produces substantial effect to poised state, reduces product cost.
In the present invention, digital signal processing device uses instant detection technique, switches the working condition of each switch at any time,
For example when foregoing battery C1 and C3 realizes electric voltage equalization, each ADC still persistently detects each single cell voltage, realizes voltage
After equilibrium, single battery C2 is likely to become both positive and negative polarity pressure difference highest battery in four batteries, and single battery C4 is likely to become four
The minimum battery of both positive and negative polarity pressure difference in individual battery, now digital signal processing device then control to connect single battery C1 and C3 phase
Inductive switch disconnects, and closes the respective switch for connecting single battery C2 and C4, realizes the electric voltage equalization between C2 and C4.Realize dynamic
During state Balance route and immediately detection, it is possible to use when increasing clock generator generation in digital signal processing device
Clock signal, management is synchronized to detection voltage and switching switch motion, reduces the possibility that misoperation and operation conflict occur,
Rising edge clock signal can be for example arranged on and start new voltage detecting, in this cycle trailing edge or next cycle after detection
Rising edge is controlled switching to each switch, so as to preferably realize that sequential is correct.
Although embodiment of the present invention only discloses the situation of four single battery series connection, it is apparent that ability
Field technique personnel can arbitrarily increase battery series connection number according to the disclosure of invention, realize the series connection of more single batteries
Battery network structure.
In the present invention, digital signal processing device realize according to data signal sequencing selection peak and minimum, and
The corresponding switch of control, is in the art very simple program composition, belongs to prior art, and those skilled in the art can be with
Easily realize.
Using series battery voltage balanced management system of the present invention, series battery and its control method, tool
There is following superiority：
One, realizes the balanced management of each single cell voltage to series battery, dynamic responding speed using switching network
It hurry up, using multiplexing, time-multiplexed instant control mode makes cell voltage balanced at any time, effectively increases battery and use
Life-span.
Two, high-voltage battery energy are collected for supplementing low-voltage battery, improve battery utilization ratio, extend electricity
Pond single charge use time.
Three, lift charging voltage using increasing apparatus, effectively shorten time for balance, portfolio effect is greatly improved, can be with
Realize the equilibrium between completion high-low pressure voltage within a very short time.
All single battery only needs to use a Battery pack increasing apparatus four, while to the accuracy of detection of voltage check device
It is required that being greatly reduced, balanced management hardware cost is reduced.
Previously described each preferred embodiment for the present invention, if the preferred embodiment in each preferred embodiment
It is not substantially contradictory or premised on a certain preferred embodiment, each preferred embodiment can any stack combinations
Use, the design parameter in the embodiment and embodiment merely to clearly state inventor invention verification process, and
The scope of patent protection of the limitation present invention is not used to, scope of patent protection of the invention is still defined by its claims, all
It is the equivalent structure change made with the specification and accompanying drawing content of the present invention, similarly should be included in the protection model of the present invention
In enclosing.
Claims (10)
1. a kind of series battery voltage balanced management system, multiple single batteries applied to cascade, it is characterised in that
Including multiple voltage check devices and digital signal processing device, each single anode and a voltage check device are inputted
End connection, the detection means output signal is data signal, the output end and Digital Signal Processing of each voltage check device
Device is connected, and the series battery also includes a switching network and voltage boosting device；Each single anode
Connecting valve network, the switching network is also connected with the voltage input end and voltage output end of voltage boosting device；
The switching network can be switched by switching, and select the positive pole of any one single battery and the electricity of voltage boosting device
Press input or voltage output end connection；Each switch control connection, institute of the digital signal processing device and switching network
State digital signal processing device and possess following function：The data signal inputted according to voltage check device, detects positive and negative extreme pressure
The minimum and maximum single battery of difference.
2. series battery voltage balanced management system as claimed in claim 1, it is characterised in that the voltage boosting device
For BOOST boost configurations circuit or include the two-stage booster circuit of one-level BOOST boost configuration circuits.
3. series battery voltage balanced management system as claimed in claim 1, it is characterised in that the switching network includes
Multiple equalizer switches of each single anode are connected respectively, and the other end of the equalizer switch connects with voltage switching end
Connect；The voltage input end and voltage output end of the voltage boosting device are cut by low tension switch and high-voltage switch gear with voltage respectively
Change end connection.
4. series battery voltage balanced management system as claimed in claim 1, it is characterised in that the switching network includes
Connect multiple input switches of each single anode respectively, the other end of the input switch with voltage boosting device
Voltage input end is connected, and the switching network also includes the multiple output switchs for connecting each single anode respectively, described
The other end of output switch is connected with the voltage output end of voltage boosting device.
5. series battery voltage balanced management system as claimed in claim 1, it is characterised in that the Digital Signal Processing
Device is built-in with clock generator.
6. series battery, it is characterised in that employ the balanced management system as described in claim 1-5 any one.
7. series battery control method, it is characterised in that based on the balanced management system as described in claim 1-5 any one
System, the data signal that digital signal processing device is inputted according to voltage check device, detect immediately both positive and negative polarity pressure difference it is maximum and
Minimum single battery, using the control of switching network, makes the electricity of the maximum single anode of pressure difference and voltage boosting device
Press input connection, the voltage output end connection of the minimum single anode of pressure difference and voltage boosting device.
8. series battery control method as claimed in claim 7, it is characterised in that based on as claimed in claim 3 equal
Weighed management system, and digital signal processing device detected after the minimum and maximum single battery of both positive and negative polarity pressure difference, first only will be with
The equalizer switch and low tension switch of the maximum single battery connection of pressure difference close a setting duration, then only will be single with pressure difference minimum
The equalizer switch and high-voltage switch gear of battery connection close a setting duration.
9. series battery control method as claimed in claim 7, it is characterised in that based on as claimed in claim 4 equal
Weighed management system, and digital signal processing device is detected after the minimum and maximum single battery of both positive and negative polarity pressure difference, only will be with pressure
The input switch of the maximum single battery connection of difference and the output switch closure being connected with the minimum single battery of pressure difference.
10. series battery control method as claimed in claim 7, it is characterised in that based on as claimed in claim 5 equal
Weigh management system, the switching that the digital signal processing device judges for the identification of data signal and each is switched, in clock
The each cycle edge for the clock signal that generator is produced starts synchronous progress.
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| CN108382230A (en) * | 2018-02-07 | 2018-08-10 | 成都信息工程大学 | The active equalization control method of power battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108155427A (en) * | 2017-12-29 | 2018-06-12 | 中科芯时代科技有限公司 | A kind of lithium battery pack management chip and battery balanced control method |
| CN108382230A (en) * | 2018-02-07 | 2018-08-10 | 成都信息工程大学 | The active equalization control method of power battery |
| CN113612277A (en) * | 2021-07-30 | 2021-11-05 | 阳光电源股份有限公司 | Battery unit and control method thereof |
| CN113612277B (en) * | 2021-07-30 | 2024-02-09 | 阳光电源股份有限公司 | Battery unit and control method thereof |
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