CN105896663B - A kind of sampling flow equalizing circuit of battery balanced manager - Google Patents
A kind of sampling flow equalizing circuit of battery balanced manager Download PDFInfo
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- CN105896663B CN105896663B CN201610317911.6A CN201610317911A CN105896663B CN 105896663 B CN105896663 B CN 105896663B CN 201610317911 A CN201610317911 A CN 201610317911A CN 105896663 B CN105896663 B CN 105896663B
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- 238000005070 sampling Methods 0.000 title claims abstract description 72
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims 1
- 239000000178 monomer Substances 0.000 description 29
- 230000009471 action Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H02J7/0021—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of sampling flow equalizing circuit of battery balanced manager, the circuit flows unit including n sampling, sampling stream unit includes sample circuit and flow equalizing circuit, and sample circuit includes single battery anode sampling divider resistance and single battery cathode sampling divider resistance；Ith sample flows unit and is connect with i-th of battery cell；One end of wherein i-th battery cell anode sampling divider resistance connects the anode Vcelli+ of i-th of battery cell, other end connection battery electrode Vcell, by two series resistance Ri1And Ri3It forms；One end of i-th of single battery cathode sampling divider resistance connects the cathode Vcelli of i-th of battery cell, other end connection battery electrode Vcell, by two series resistance Ri2And Ri4It forms；I-th of flow equalizing circuit is flows resistance Ri0, flows resistance Ri0It is parallel between the positive and negative anodes of i-th of battery cell.The present invention has many advantages, such as that circuit is simple, sampling precision is high, leakage current difference is small, at low cost.
Description
Technical field
The present invention relates to a kind of sampling flow equalizing circuits of battery balanced manager, belong to technical field of power management.
Technical background
Circuit of battery pack balancing makes monomer voltage deviation be maintained at expected for ensureing that each single battery charging voltage is balanced
In the range of, so as to ensure that each single battery has not received stress impact during the spacecraft service life and is damaged.If without
Equalizaing charge controls, and with the increase of charge and discharge cycles, each monomer battery voltage difference can become larger, its service life is caused to contract significantly
It is short.
In current battery balanced management circuit, the sample circuit of battery cell voltage is sampled using electric resistance partial pressure, is seen
Patent application《A kind of equalizaing charge manager of Li-ion batteries piles for spacecraft》(201310128544.1) and article
《Spacecraft lithium-ions battery group equalizing circuit is studied》, spacecraft engineering, vol.21, No.1, page 73.This Balancing Manager
The Balance route to accumulator is realized by comparing the average voltage and monomer battery voltage of whole group battery.The Balancing Manager
The electric resistance partial pressure sample circuit of use, there is the inconsistent limitation of each battery cell sampling leakage current, adopting on each monomer
Sample leakage current is different, and sampling leakage current difference causes cell voltage deviation to increase, and causes monomer voltage unbalanced.
Invention content
The purpose of the present invention is to solve the above problems, propose that a kind of sampling applied to battery balanced manager is flowed
Circuit, the present invention have many advantages, such as that circuit is simple, sampling precision is high, leakage current difference is small, at low cost.
Realize that technical scheme is as follows：
A kind of sampling flow equalizing circuit of battery balanced manager, applicable battery pack share n battery cell, the circuit
Unit is flowed including n sampling, the sampling stream unit includes sample circuit and flow equalizing circuit, and the sample circuit includes storing
Battery cell anode samples divider resistance and single battery cathode sampling divider resistance；Ith sample flows unit and i-th
Battery cell connects, i=1,2 ... n；Wherein
One end of i-th of battery cell anode sampling divider resistance connects the anode Vcelli+ of i-th of battery cell, separately
One end connects battery electrode Vcell-, by two series resistance Ri1And Ri3It forms；I-th of single battery cathode sampling
One end of divider resistance connects the cathode Vcelli- of i-th of battery cell, other end connection battery electrode Vcell-, by
Two series resistance Ri2And Ri4It forms；
I-th of flow equalizing circuit is flows resistance Ri0, flows resistance Ri0It is parallel between the positive and negative anodes of i-th of battery cell；
R10=0 (i=1)
The resistance Ri1And Ri3Between lead-out wire as the positive sampled output of i-th of battery cell, Ri2And Ri4Between
Lead-out wire bears sampled output as i-th of battery cell.
Further, sampling of the present invention stream unit further includes modulate circuit, and the modulate circuit is mainly by power supply
Protect circuit and output protection circuit；
I-th of power protecting circuit includes AD sampling A/D chips, current-limiting resistance Ri7And Ri8, decoupling capacitor Ci1、Ci2、Ci3With
Ci4；The AD sampling A/D chips+vdd terminal connects two branches, a branch passes through resistance Ri8Connect power supply V+, another branch
Pass sequentially through decoupling capacitor Ci3And Ci4Connect Vcell-；- VSS the ends of the AD sampling A/D chips connect two branches, a branch
Pass through resistance Ri7Power supply V- is connected, excessively another branch passes sequentially through decoupling capacitor Ci1And Ci2Connect Vcell-；AD sampling A/D chips
+ IN ends connect Ri1And Ri3Between lead-out wire ,-IN ends connection resistance the R of AD sampling A/D chipsi2And Ri4Between lead-out wire；AD is adopted
The OUT terminal connection output protection circuit of sample chip；
I-th of output protection circuit includes current-limiting resistance Ri9, filter capacitor Ci5And Ci6, catching diode Di1；Resistance Ri9
The output terminal OUT, resistance R of one end connection AD samplingsi9The other end connect diode D respectivelyi1Cathode and capacitance Ci5, two poles
Pipe Di1Anode connection battery pack cold end Vcell-, capacitance Ci5Series capacitance Ci6, Ci6The other end connects battery pack low potential
Hold Vcell-；Resistance Ri9Sampled output of the other end as battery cell.
Further, sample circuit of the present invention further includes sampling current-limiting resistance Ri5And Ri6, the Ri5It is connected to Ri1With
Ri3Between lead-out wire on, the Ri6It is connected to Ri2And Ri4Between lead-out wire on.
Advantageous effect
First, flows resistance of the present invention samples leakage current for compensating as caused by sample circuit, passes through flows resistance
Compensating action makes multiple cell batteries sampling leakage currents identical, reduces influence of the leakage current difference to cell voltage, keeps away
It is unbalanced to exempt from the battery cell voltage caused by sampling leakage current.
Second, present invention setting modulate circuit includes power protecting circuit and output protection circuit；Power protecting circuit is set
Current-limiting resistance, decoupling capacitor are put, decoupling capacitor is used in series using two, avoids the influence of single capacitance short-circuit；Output is protected
Protection circuit is made of current-limiting resistance, filter capacitor and catching diode, and filter capacitor takes two to be used in series, and avoids single electricity
Hold the influence of short circuit, output protection circuit inverse parallel catching diode, when sample circuit failure exports, catching diode conducting is defeated
Go out voltage clamping, protection late-class circuit normal work.
Third, circuit of the present invention is simple, and sampling precision is high, and circuit reliability is high, at low cost.
Description of the drawings
Fig. 1 is the battery pack sampling flow equalizing circuit structure principle chart of the present invention；
Fig. 2 is present invention sampling electric leakage flow diagram.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
The present invention proposes a kind of sampling flow equalizing circuit (as shown in Figure 1) of battery balanced manager, each battery cell
It samples flow equalizing circuit and includes sample circuit, flow equalizing circuit and modulate circuit.Battery pack shares n monomer, battery pack in Fig. 1
It samples flow equalizing circuit and includes battery cell 1 to the sampling flow equalizing circuit of battery cell n.Wherein, the cold end of battery pack is electricity
The cold end Vcell- of pond monomer 1, the hot end of battery pack are the maximum potential end Vcell+ of battery cell n.Below with
It is illustrated for battery cell n.
Sample circuit includes single battery anode sampling divider resistance Rn1 and Rn3, single battery cathode sampling partial pressure
Resistance Rn2 and Rn4, sampling current-limiting resistance Rn5 and Rn6, wherein：
After the other end series resistance Rn3 of one end connection single battery the hot end Vcell+, resistance Rn1 of resistance Rn1
It is connect with the low potential Vcell- ends of battery pack, i.e. the cold end of first segment monomer；
After the other end series resistance Rn4 of one end connection single battery the cold end Vcelln-, resistance Rn2 of resistance Rn2
It is connect with the low potential Vcell- ends of battery pack, i.e. the cold end of first segment monomer；
Lead-out wire between resistance Rn1 and Rn3 is connected with Rn5, the anode input of the other end connection AD sample circuits of Rn5
End；
Lead-out wire between resistance Rn2 and Rn4 is connected with Rn6, the cathode input of the other end connection AD sample circuits of Rn6
End.
Flow equalizing circuit is flows resistance Rn0, and flows resistance samples leakage current for compensating as caused by sample circuit, passes through
The compensating action of flows resistance makes multiple cell batteries sampling leakage currents identical, reduces leakage current difference to cell voltage
Influence；
The other end connection monomer electricity of one end connection single battery the hot end Vcell+, resistance Rn0 of flows resistance Rn0
Pond cold end Vcelln-.
Modulate circuit includes power protecting circuit and output protection circuit.Power protecting circuit is provided with current-limiting resistance Rn7
And Rn8, decoupling capacitor Cn1, Cn2, Cn3, Cn4, decoupling capacitor are used in series using two, avoid the shadow of single capacitance short-circuit
It rings；Output protection circuit is made of current-limiting resistance Rn9, filter capacitor Cn5 and Cn6 and catching diode Dn1, and filter capacitor is taken
Two are used in series, and avoid the influence of single capacitance short-circuit, output protection circuit inverse parallel catching diode, when sample circuit event
Barrier output, catching diode conducting output voltage is clamped, protection late-class circuit normal work, wherein：
One end connection power supply V-, the other end series capacitance Cn2 of the other end series capacitance Cn1, capacitance Cn1 of resistance Rn7,
The other end connection battery pack cold end Vcell- of Cn2；
Lead-out wire between resistance Rn7 and capacitance Cn1 is connected with the negative power end-Vss of AD sample circuits；
One end connection power supply V+, the other end series capacitance Cn4 of the other end series capacitance Cn3, capacitance Cn3 of resistance Rn8,
The other end connection battery pack cold end Vcell- of Cn4；
Lead-out wire between resistance Rn8 and capacitance Cn3 is connected with the positive power source terminal+VDD of AD sample circuits；
The other end of the output terminal OUT of resistance Rn9 one end connection AD samplings, resistance Rn9 connect the negative of diode Dn1 respectively
Pole and capacitance Cn5, anode connection the battery pack cold end Vcell-, capacitance Cn5 series capacitances Cn6, Cn6 of diode Dn1 are another
One end connection battery pack cold end Vcell-.
The accumulator group of n batteries monomer compositions, 1 sample rate current of battery cell is maximum, uncompensation sampling resistor, to monomer
Sampling leakage current is made to be consistent with monomer 1 after 2- monomers n compensation.For the compensation resistance R of 2 sample circuit of monomer20To monomer n
The compensation resistance R of sample circuitn0It is obtained by following formula：
As shown in Fig. 2, the design for compensating resistance is briefly described below：
If battery cell voltage is Vbat
Section 1 monomer：
Negative terminal sample rate current
Anode sample rate current
Section 2 monomer：
Negative terminal sample rate current
Anode sample rate current
N-th section monomer：
Negative terminal sample rate current
Anode sample rate current
Total sampling leakage current of Section 1 monomer is：
I10=I12+I21+I22+...+In1+In2
Total sampling leakage current of Section 2 monomer is：
I20=I22+...+In1+In2
Total sampling leakage current of n-th section monomer is：
In0=In2
The sampling leakage current of Section 1 monomer is maximum, uncompensation sampling resistor；After 2nd to the n-th section monomer compensation
Sampling leakage current is consistent with Section 1, reduces influence of the sampling leakage current difference to cell voltage.
The sampling leakage current that Section 2 monomer needs compensate：
I2b=I10-I20=I12+I21
The sampling leakage current that n-th section monomer needs compensate：
Inb=I10-In0=I12+I21+I22+...+In1
Resistance sizes are compensated to remove in the sampling leakage current that need to be compensated for monomer voltage；
Section 2 monomer compensates resistance：
I-th section monomer compensation resistance：
In conclusion the foregoing is merely a prefered embodiment of the invention, it is not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (2)
1. a kind of sampling flow equalizing circuit of battery balanced manager, applicable battery pack share n battery cell, feature exists
In the circuit includes n sampling and flows unit, and the sampling stream unit includes sample circuit and flow equalizing circuit, the sampling
Circuit includes single battery anode sampling divider resistance and single battery cathode sampling divider resistance；Ith sample flows
Unit is connect with i-th of battery cell, i=1,2 ... n；Wherein
One end of i-th single battery anode sampling divider resistance connects the anode Vcelli+ of i-th battery cell, another
End connection battery electrode Vcell-, by two resistance Ri1And Ri3It is in series；I-th of single battery cathode sampling point
One end of piezoresistance connects the cathode Vcelli- of i-th of battery cell, other end connection battery electrode Vcell-, by two
A resistance Ri2And Ri4It is in series；
I-th of flow equalizing circuit is flows resistance Ri0, flows resistance Ri0It is parallel between the positive and negative anodes of i-th of battery cell；
R10=0
The resistance Ri1And Ri3Between lead-out wire as the positive sampled output of i-th of battery cell, Ri2And Ri4Between extraction
Line bears sampled output as i-th of battery cell；
The sampling stream unit further includes modulate circuit, and the modulate circuit is mainly by power protecting circuit and output protection electricity
Road forms；
I-th of power protecting circuit includes AD sampling A/D chips, current-limiting resistance Ri7And Ri8, decoupling capacitor Ci1、Ci2、Ci3And Ci4；Institute
State AD sampling A/D chips+vdd terminal connects two branches, a branch passes through resistance Ri8Power supply V+ is connected, another branch leads to successively
Cross decoupling capacitor Ci3And Ci4Connect battery electrode Vcell-；Two branches of-VSS ends connection of the AD sampling A/D chips, one
Branch passes through resistance Ri7Power supply V- is connected, another branch passes sequentially through decoupling capacitor Ci1And Ci2Connect battery electrode Vcell-；
+ IN ends connection the R of AD sampling A/D chipsi1And Ri3Between lead-out wire ,-IN ends connection resistance the R of AD sampling A/D chipsi2And Ri4Between
Lead-out wire；The OUT terminal connection output protection circuit of AD sampling A/D chips；
I-th of output protection circuit includes current-limiting resistance RI9,Filter capacitor Ci5And Ci6, catching diode Di1；Resistance Ri9One end connects
Meet the output terminal OUT, resistance R of AD samplingsi9The other end connect diode D respectivelyi1Cathode and capacitance Ci5, diode Di1's
Anode connects battery electrode Vcell-, capacitance Ci5Series capacitance Ci6, Ci6Other end connection battery electrode Vcell-；Resistance
Ri9Sampled output of the other end as battery cell.
A kind of 2. sampling flow equalizing circuit of battery balanced manager according to claim 1, which is characterized in that the sampling electricity
Road further includes sampling current-limiting resistance Ri5And Ri6, the Ri5It is connected to Ri1And Ri3Between lead-out wire on, the Ri6It is connected to Ri2
And Ri4Between lead-out wire on.
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| CN201610317911.6A CN105896663B (en) | 2016-05-13 | 2016-05-13 | A kind of sampling flow equalizing circuit of battery balanced manager |
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| CN201610317911.6A CN105896663B (en) | 2016-05-13 | 2016-05-13 | A kind of sampling flow equalizing circuit of battery balanced manager |
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| CN105896663B true CN105896663B (en) | 2018-06-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107040025B (en) * | 2017-05-10 | 2020-02-28 | 国网江西省电力有限公司电力科学研究院 | Method for realizing integrated circuit special for single storage battery |
| CN109613447B (en) * | 2018-12-26 | 2024-08-13 | 苏州易美新思新能源科技有限公司 | Self-balancing battery voltage sampling circuit |
| CN112462272A (en) * | 2020-11-11 | 2021-03-09 | 深圳市誉娇诚科技有限公司 | Voltage sampling circuit of multi-string lithium ion battery |
| CN114336853B (en) * | 2021-12-29 | 2023-11-28 | 西安华泰半导体科技有限公司 | Equalization circuit structure for multiplexing sampling circuit during multi-lithium battery component |
| CN114865742A (en) * | 2022-04-29 | 2022-08-05 | 广东友电新能源科技有限公司 | Battery pack parallel circuit, design method, battery and charging and discharging system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2844928Y (en) * | 2005-11-22 | 2006-12-06 | 比亚迪股份有限公司 | Multiple serial battery voltage testing circuits with current equilization function |
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| US7081737B2 (en) * | 2003-06-19 | 2006-07-25 | O2Micro International Limited | Battery cell monitoring and balancing circuit |
| CN103178586A (en) * | 2013-04-15 | 2013-06-26 | 北京空间飞行器总体设计部 | Equalizing charge manager of lithium ion battery pack for spacecraft |
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| CN2844928Y (en) * | 2005-11-22 | 2006-12-06 | 比亚迪股份有限公司 | Multiple serial battery voltage testing circuits with current equilization function |
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Effective date of registration: 20170619 Address after: 100094 Friendship Road, Beijing, Haidian District No. 104 Applicant after: Beijing Institute of Spacecraft System Engineering Applicant after: China Great Wall Industry Corporation Address before: 100094 Friendship Road, Beijing, Haidian District No. 104 Applicant before: Beijing Institute of Spacecraft System Engineering |
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