CN111469713A - Passive equalization control method for new energy automobile power battery - Google Patents

Passive equalization control method for new energy automobile power battery Download PDF

Info

Publication number
CN111469713A
CN111469713A CN202010351910.XA CN202010351910A CN111469713A CN 111469713 A CN111469713 A CN 111469713A CN 202010351910 A CN202010351910 A CN 202010351910A CN 111469713 A CN111469713 A CN 111469713A
Authority
CN
China
Prior art keywords
battery
soc
balance
voltage
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010351910.XA
Other languages
Chinese (zh)
Other versions
CN111469713B (en
Inventor
何春芳
史洋
徐硕
李儒龙
谢琦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongfeng Motor Corp
Original Assignee
Dongfeng Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongfeng Motor Corp filed Critical Dongfeng Motor Corp
Priority to CN202010351910.XA priority Critical patent/CN111469713B/en
Publication of CN111469713A publication Critical patent/CN111469713A/en
Application granted granted Critical
Publication of CN111469713B publication Critical patent/CN111469713B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18Methods 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
    • B60L58/22Balancing the charge of battery modules
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/13Maintaining the SoC within a determined range
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

The invention relates to the technical field of battery equalization control, in particular to a passive equalization control method for a power battery of a new energy automobile, which comprises the step of controlling the power battery to be in a passive equalization mode at intervals of Tn(material, structure), the voltage inquiry of a round of battery cell is carried out; when the actual voltage U of one or more battery cells exists in the batteryn(tep, time) and the absolute value of the average voltage difference of the battery electric core is out of the set safe voltage range, and then passive balance control is carried out; the passive equalization control process is as follows: calculating theoretical total capacity SOC of batteryTheory of the inventionAnd the real-time electric quantity SOC of the batteryReal timeThe SOC range of the SOC' is determined by inquiring the SOC range-balance current I comparison table, balance control is carried out according to balance current corresponding to the SOC range in the SOC range-balance current I comparison table, passive balance is carried out when the electric quantity difference among the battery cores reaches a threshold value, the difference area of the electric quantity is fully considered, and balance current can be carried outThe control is in a reasonable small area, and the accuracy of passive equalization control is ensured.

Description

Passive equalization control method for new energy automobile power battery
Technical Field
The invention relates to the technical field of battery equalization control, in particular to a passive equalization control method for a power battery of a new energy automobile.
Background
The power battery is a source of energy of the electric automobile, and not only provides electric energy for driving the electric automobile, but also provides electric energy for electronic auxiliary equipment on the automobile. The cell performances of the series battery pack are difficult to achieve complete consistency, and the environmental difference in the using process aggravates the inconsistency among the performances of the single cells of the battery pack, so that the imbalance condition among the cells is worsened. Therefore, the inconsistency among the monomers is required to be improved through balance control in the use process of the battery pack, the energy utilization efficiency of the battery pack is improved, the service life of the battery pack is prolonged, and the cruising ability of the electric automobile is further improved. The passive balance plays a very key role in prolonging the service life of the power battery and improving the dynamic property of the new energy vehicle.
In the current passive equalization control algorithm of the power battery of the new energy automobile, the current and the voltage of a battery cell are mainly taken as consideration bases. When charging, when the voltage of the battery cell exceeds a certain limit value, the battery cell with the highest voltage is discharged to achieve the effect of balance. During discharging, when the voltage of the battery cell is lower than a certain limit value, the battery cell with the lowest voltage is charged to achieve the effect of balancing. The method fully considers the real-time voltage and current values of the battery cell, but does not consider the influence brought by the balanced current, the temperature and the time. Especially for the balanced current, if the balanced current can be controlled in a small state, the volume of a large number of parts can be controlled, and the cost of electronic components can be reduced. Therefore, it is also important to control the equalizing current in the control of the passive equalization.
Disclosure of Invention
The invention aims to provide a passive equalization control method for a power battery of a new energy automobile, aiming at the defects of the prior art, and the passive equalization control method can control the passive equalization current in a reasonable small area, so that the temperature of a battery pack in passive equalization can be better controlled.
The technical scheme of the invention is as follows:
at intervals of time Tn(material, structure), the voltage inquiry of a round of battery cell is carried out;
when the actual voltage U of one or more battery cells exists in the batteryn(tep, time) and the absolute value of the average voltage difference of the battery electric core is out of the set safe voltage range, and then passive balance control is carried out;
the passive equalization control process is as follows:
calculating theoretical total capacity SOC of batteryTheory of the inventionAnd the real-time electric quantity SOC of the batteryReal timeDetermining the SOC range of the SOC' by inquiring the SOC range-balance current I comparison table, and carrying out balance control according to the balance current corresponding to the SOC range in the SOC range-balance current I comparison table.
Preferably, the actual voltage U of the battery cellnThe (tep, time) acquisition mode comprises the following steps:
step 1, acquiring a voltage when the battery is fully charged and a voltage after the battery is reduced to a low charge through a sensor, and inquiring an electric quantity-voltage comparison table to obtain a first electric energy consumption amount of the battery in the process of reducing the battery from the full charge to the low charge;
step 2, integrating the discharge current according to the time consumed by the battery for reducing the full electric quantity to the low electric quantity to obtain a second electric energy consumption of the battery in the process of reducing the full electric quantity to the low electric quantity, calculating a difference value between the first electric energy consumption and the second electric energy consumption, and executing a step 3 and an inverse regular execution step 4 if the difference value is within a set error range;
step 3, taking the average value of the first electric energy consumption and the second electric energy consumption as the electric energy consumption, and inquiring an electric quantity-voltage comparison table according to the electric energy consumption to obtain a voltage U to be correctedn
Step 4, neutralizing the first electric energy consumption and the second electric energy consumptionThe electric quantity closer to the actual electric quantity required by the whole vehicle is used as the electric energy consumption quantity, and the electric quantity-voltage comparison table is inquired according to the electric energy consumption quantity to obtain the voltage U to be correctedn
Step 5, calculating the temperature change speed according to the time required by the battery to change from the initial temperature to the current temperature, inquiring a voltage correction coefficient comparison table according to the current temperature and the temperature change speed to obtain a voltage correction coefficient α, and obtaining the voltage correction coefficient according to a formula Un(tep,time)=Un+α*UnTo obtain the actual voltage Un(tep,time)。
Preferably, the SOC ranges in the SOC range-balance current I comparison table are 0 to SOC sequentially1、SOC1~SOC2……SOCn-1~SOCnThe balance current I corresponding to each SOC range in the SOC range-balance current I comparison table is I in sequence1、I2……In
Wherein 0<SOC1<SOC2<SOCn<C,0<I1<I2<In<ImaxSaid I ismaxThe maximum discharge current of the battery.
Preferably, the balancing current I ═ I (the difference in capacity C' between the cells, the time t available for balancing), I ═ I (the time t available for balancing)1、I2……InAre obtained according to the formula calibration.
Preferably, the real-time temperature of the battery pack and the equilibrium temperature point T of the battery pack are measuredBatteryDifference value of (1) TXIf the temperature exceeds the set temperature range, performing power reduction treatment and then performing passive balance control;
the method for reducing the power is to use the SOCTheory of the invention' As a new theoretical Total Capacity of the Battery, the SOCTheory of the invention′<SOCTheory of the invention
Preferably, the method further comprises performing a correction process on the equalization current, and the method comprises:
inquiring a temperature range-balance current I comparison table, and determining the real-time temperature of the battery pack and the balance temperature point T of the battery packBatteryDifference value of (1) TXTo which it belongsA temperature range;
and obtaining a corresponding balance current correction value according to the temperature range in the temperature range-balance current I comparison table, wherein the balance current correction value is the product of the balance current obtained after the SOC range-balance current I comparison table is inquired and a correction coefficient.
Preferably, the temperature ranges in the temperature range-equilibrium current I comparison table are T1-T2, T2-T3 and T3-T4 in sequence, and the equilibrium currents I corresponding to the temperature ranges in the temperature range-equilibrium current I comparison table are I in sequence0*α、I0*β、I0*γ;
Wherein 0<T1<T2<T3<T4<Tmaxα > β > gamma, said TmaxThe maximum acceptable temperature of the battery, I0The balance current obtained after inquiring the SOC range-balance current I comparison table.
The invention has the beneficial effects that:
1. when the electric quantity difference between the electric cores reaches a threshold value, passive equalization is carried out, the difference area of the electric quantity is fully considered, the equalization current can be controlled in a reasonable small area, and the accuracy of the passive equalization control is guaranteed.
2. The real-time voltage and current values and the influence of temperature and time on the real-time voltage of the battery cell are considered on the battery cell voltage, so that the battery cell voltage is more accurate.
3. The method has the advantages that the pure current balance control or the current balance control after power reduction is selected according to the real-time temperature of the battery pack, the influence of the battery temperature and the battery performance attenuation on the balance control can be eliminated, the battery pack temperature and the balance current during the balance control can be better controlled, and meanwhile, the hardware cost is reduced.
4. In the power reduction balance control, a correction coefficient pair I is adopted0And the accuracy of the balance control can be further ensured by correcting. The correction coefficient is obtained after real-time control, and reasonable passive balance can be carried out according to the actual performance of the battery and the requirement of the whole vehicle on the battery.
Drawings
Fig. 1 is a control flow diagram of a passive equalization control method for a new energy vehicle power battery according to the present invention.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
As shown in fig. 1, the control flow of the passive equalization control method for the power battery of the new energy vehicle of the invention is as follows:
step 1: collecting the real-time voltage of the battery cell, analyzing the influence of temperature and time on the cell to obtain the actual voltage U of the celln(tep,time)。
Actual voltage U of the battery cellnThe (tep, time) acquisition mode comprises the following steps:
step 101, acquiring a voltage when the battery is fully charged and a voltage after the battery is reduced to a low charge through a sensor, and inquiring an electric quantity-voltage comparison table to obtain a first electric energy consumption amount of the battery in the process of reducing the battery from the full charge to the low charge;
step 102, integrating the discharge current according to the time consumed by the battery for reducing the full electric quantity to the low electric quantity to obtain a second electric energy consumption of the battery in the process of reducing the full electric quantity to the low electric quantity, calculating a difference value between the first electric energy consumption and the second electric energy consumption, executing step 103 if the difference value is within a set error range, and executing step 104 in an anti-regular mode;
step 103, taking the average value of the first electric energy consumption and the second electric energy consumption as the electric energy consumption, and inquiring an electric quantity-voltage comparison table according to the electric energy consumption to obtain a voltage U to be correctedn
104, taking the electric energy consumption which is closer to the actual electric energy demand of the whole vehicle in the first electric energy consumption and the second electric energy consumption as the electric energy consumption, and inquiring an electric quantity-voltage comparison table according to the electric energy consumption to obtain a to-be-corrected voltage Un
Step 105, calculating the temperature change speed according to the time required by the battery to change from the initial temperature to the current temperature, inquiring a voltage correction coefficient comparison table according to the current temperature and the temperature change speed, and acquiring the voltage correctionPositive coefficient α according to formula Un(tep,time)=Un+α*UnTo obtain the actual voltage Un(tep,time)。
Wherein, the electric quantity-voltage comparison table is a conventional table obtained according to statistics.
The voltage correction coefficient comparison table is a two-dimensional comparison table, the row attributes and the column attributes of the voltage correction coefficient comparison table are the current temperature and the temperature change speed respectively, and data in the table are voltage correction coefficients. The table is a voltage correction coefficient obtained by counting the variation state of the electric quantity at different temperatures and temperature variation speeds and based on the variation state of the electric quantity.
Step 2: according to the material and the battery arrangement structure of the battery pack, a table is looked up to obtain a time period Tn (structural) for polling and checking the electric quantity of the battery cell, and the following principle is that the material and the arrangement structure which are more unfavorable for heat dissipation are more favorable, and the time period for polling and checking the electric quantity of the battery cell is shorter.
And step 3: at intervals of time Tn(material), a round of voltage inquiry of battery cell is carried out, when the voltage U of one or more battery cells exists in the batterynAnd (tep, time) and the absolute value of the average voltage difference value of the battery electric core is out of the set safe voltage range, and then the passive balance control is carried out.
And 4, step 4: setting a battery pack equalization temperature point TBatteryCalculating the real-time temperature of the battery pack and the equilibrium temperature point T of the battery packBatteryDifference value of (1) TXWhen the real-time temperature of the battery pack and the equilibrium temperature point T of the battery pack are reachedBatteryDifference value of (1) TXOut of the set temperature range (0, T)1) If yes, executing step 5; when the real-time temperature of the battery pack and the equilibrium temperature point T of the battery packBatteryDifference value of (1) TXWithin a set temperature range (in the present embodiment, the set temperature range is (0, T)1) Step 6) is executed;
and 5: the power reduction processing is carried out by using the SOCTheory of the invention' As a new theoretical Total Capacity of the Battery, the SOCTheory of the invention′<SOCTheory of the invention,SOCTheory of the invention' may be set in terms of percentages.
Step 6: calculating the theoretical total capacity of the battery (if the preorder step is 4, the theoretical total capacity of the battery is SOC)Theory of the inventionIf the preceding step is 4, the theoretical total capacity of the battery is SOCTheory of the invention') and battery real-time capacity SOCReal timeDetermining the SOC range of the SOC' by inquiring the SOC range-balance current I comparison table, and carrying out balance control according to the balance current corresponding to the SOC range in the SOC range-balance current I comparison table.
Preferably, the SOC ranges in the SOC range-balance current I comparison table are 0 to SOC in sequence1、SOC1~SOC2……SOCn-1~SOCnThe balance current I corresponding to each SOC range in the SOC range-balance current I comparison table is I in sequence1、I2……In(ii) a Wherein 0<SOC1<SOC2<SOCn<C,0<I1<I2<In<ImaxSaid I ismaxThe maximum discharge capacity of the battery. In this embodiment, n is 3, and the value of n may be set according to an actual situation.
In this example, the SOC range-equalization current I look-up table is shown in the following table:
SOC range 0~SOC1 SOC1~SOC2 SOC2~SOC3
Equalizing current I I1 I2 I3
Preferably, the balancing current I ═ I (the difference in capacity C' between the cells, the time t available for balancing), I ═ I (the time t available for balancing)1、I2……InAre obtained according to the formula calibration.
And 7: and correcting the equalizing current.
Inquiring a temperature range-balance current I comparison table, and determining the real-time temperature of the battery pack and the balance temperature point T of the battery packBatteryDifference value of (1) TXThe temperature range to which it belongs;
and obtaining a corresponding balance current correction value according to the temperature range in the temperature range-balance current I comparison table, wherein the balance current correction value is the product of the balance current obtained after the SOC range-balance current I comparison table is inquired and a correction coefficient.
Preferably, the temperature ranges in the temperature range-equilibrium current I comparison table are T1-T2, T2-T3 and T3-T4 in sequence, and the equilibrium currents I corresponding to the temperature ranges in the temperature range-equilibrium current I comparison table are I in sequence0*α、I0*β、I0*γ;
Wherein 0<T1<T2<T3<T4<Tmaxα > β > gamma, said TmaxThe maximum acceptable temperature of the battery, I0The balance current obtained after inquiring the SOC range-balance current I comparison table.
In this example, the temperature range-equilibrium current I comparison table is shown in the following table:
temperature range T1~T2 T2~T3 T3~T4
Equalizing current I I0 I0 I0
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.

Claims (7)

1. A passive balance control method for a power battery of a new energy automobile is characterized in that,
at intervals of time Tn(material, structure), the voltage inquiry of a round of battery cell is carried out;
when the actual voltage U of one or more battery cells exists in the batteryn(tep, time) and the absolute value of the average voltage difference of the battery electric core is out of the set safe voltage range, and then passive balance control is carried out;
the passive equalization control process is as follows:
calculating theoretical total capacity SOC of batteryTheory of the inventionAnd the real-time electric quantity SOC of the batteryReal timeDetermining the SOC range of the SOC' by inquiring the SOC range-balance current I comparison table, and carrying out balance control according to the balance current corresponding to the SOC range in the SOC range-balance current I comparison table.
2. The method according to claim 1, wherein the actual voltage U of the battery cell is controlled according to the actual voltage UnThe (tep, time) acquisition mode comprises the following steps:
step 1, acquiring a voltage when the battery is fully charged and a voltage after the battery is reduced to a low charge through a sensor, and inquiring an electric quantity-voltage comparison table to obtain a first electric energy consumption amount of the battery in the process of reducing the battery from the full charge to the low charge;
step 2, integrating the discharge current according to the time consumed by the battery for reducing the full electric quantity to the low electric quantity to obtain a second electric energy consumption of the battery in the process of reducing the full electric quantity to the low electric quantity, calculating a difference value between the first electric energy consumption and the second electric energy consumption, and executing a step 3 and an inverse regular execution step 4 if the difference value is within a set error range;
step 3, taking the average value of the first electric energy consumption and the second electric energy consumption as the electric energy consumption, and inquiring an electric quantity-voltage comparison table according to the electric energy consumption to obtain a voltage U to be correctedn
Step 4, taking the electric energy consumption which is closer to the actual electric energy demand of the whole vehicle in the first electric energy consumption and the second electric energy consumption as the electric energy consumption, and inquiring an electric quantity-voltage comparison table according to the electric energy consumption to obtain a to-be-corrected voltage Un
Step 5, calculating the temperature change speed according to the time required by the battery to change from the initial temperature to the current temperature, inquiring a voltage correction coefficient comparison table according to the current temperature and the temperature change speed to obtain a voltage correction coefficient α, and obtaining the voltage correction coefficient according to a formula Un(tep,time)=Un+α*UnTo obtain the actual voltage Un(tep,time)。
3. The passive balance control method for the power battery of the new energy automobile according to claim 1, wherein the SOC ranges in the SOC range-balance current I comparison table are sequentially 0-SOC1、SOC1~SOC2……SOCn-1~SOCnThe balance current I corresponding to each SOC range in the SOC range-balance current I comparison table is I in sequence1、I2……In
Wherein 0<SOC1<SOC2<SOCn<C,0<I1<I2<In<ImaxSaid I ismaxThe maximum discharge current of the battery.
4.The method for controlling the passive balance of the power batteries of the new energy automobile according to claim 3, wherein the balance current I (the capacity difference C' between the batteries) is I (the time t available for balance), and I is1、I2……InAre obtained according to the formula calibration.
5. The passive balance control method for the power battery of the new energy automobile according to claim 1, characterized in that when the real-time temperature of the battery pack and the balance temperature point T of the battery pack are reachedBatteryDifference value of (1) TXIf the temperature exceeds the set temperature range, performing power reduction treatment and then performing passive balance control;
the method for reducing the power is to use the SOCTheory of the invention' As a new theoretical Total Capacity of the Battery, the SOCTheory of the invention′<SOCTheory of the invention
6. The passive balance control method for the power battery of the new energy automobile according to claim 1, further comprising the step of correcting the balance current, wherein the method comprises the following steps:
inquiring a temperature range-balance current I comparison table, and determining the real-time temperature of the battery pack and the balance temperature point T of the battery packBatteryDifference value of (1) TXThe temperature range to which it belongs;
and obtaining a corresponding balance current correction value according to the temperature range in the temperature range-balance current I comparison table, wherein the balance current correction value is the product of the balance current obtained after the SOC range-balance current I comparison table is inquired and a correction coefficient.
7. The passive balance control method for the power battery of the new energy automobile as claimed in claim 6, wherein the temperature ranges in the temperature range-balance current I comparison table are sequentially T1-T2, T2-T3 and T3-T4, and the balance currents I corresponding to the temperature ranges in the temperature range-balance current I comparison table are sequentially I0*α、I0*β、I0*γ;
Wherein 0<T1<T2<T3<T4<Tmaxα > β > gamma, said TmaxThe maximum acceptable temperature of the battery, I0The balance current obtained after inquiring the SOC range-balance current I comparison table.
CN202010351910.XA 2020-04-28 2020-04-28 Passive equalization control method for new energy automobile power battery Active CN111469713B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010351910.XA CN111469713B (en) 2020-04-28 2020-04-28 Passive equalization control method for new energy automobile power battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010351910.XA CN111469713B (en) 2020-04-28 2020-04-28 Passive equalization control method for new energy automobile power battery

Publications (2)

Publication Number Publication Date
CN111469713A true CN111469713A (en) 2020-07-31
CN111469713B CN111469713B (en) 2021-11-12

Family

ID=71762838

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010351910.XA Active CN111469713B (en) 2020-04-28 2020-04-28 Passive equalization control method for new energy automobile power battery

Country Status (1)

Country Link
CN (1) CN111469713B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112339610A (en) * 2020-10-29 2021-02-09 东风汽车集团有限公司 New energy vehicle power battery charging and discharging control system and method
WO2022088591A1 (en) * 2020-10-28 2022-05-05 广州汽车集团股份有限公司 Method and system for estimating equilibrium state of battery pack of new energy vehicle
CN114578785A (en) * 2022-01-28 2022-06-03 徐州徐工挖掘机械有限公司 Power limit control method and system for electric engineering machinery

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102946479A (en) * 2012-11-02 2013-02-27 惠州Tcl移动通信有限公司 Method for mobile terminal to update electric quantity of battery and mobile terminal
CN104426180A (en) * 2013-08-28 2015-03-18 国家电网公司 Equalization control chip and equalization control method
CN104505550A (en) * 2014-12-25 2015-04-08 宁德时代新能源科技有限公司 Passive equalizing method and system for lithium iron phosphate battery pack
CN104865533A (en) * 2015-04-30 2015-08-26 江苏中辆科技有限公司 High-precision display method for state of charge (SOC) of on-vehicle power supply
CN205039569U (en) * 2015-09-02 2016-02-17 国网上海市电力公司 Lithium ion battery organizes balanced management system
CN105610209A (en) * 2015-10-21 2016-05-25 金龙联合汽车工业(苏州)有限公司 Passive equalization method of battery pack
CN105811500A (en) * 2016-03-17 2016-07-27 哈尔滨工业大学 Balance control method for lithium-ion battery pack
CN106208235A (en) * 2016-08-18 2016-12-07 联方云天科技(北京)有限公司 The forecast Control Algorithm that a kind of lithium cell charging passively equalizes
CN106300545A (en) * 2016-09-22 2017-01-04 华中科技大学 A kind of active equalization for liquid metal cell controls device and control method
EP3114493A1 (en) * 2014-03-07 2017-01-11 Renault S.A.S. Method for assessing a state of charge of a battery comprising a plurality of cells having a variable range of use of state of charge
CN106340926A (en) * 2016-09-29 2017-01-18 中国科学院广州能源研究所 Lithium battery equalization control strategy optimization method
US20170125857A1 (en) * 2011-12-26 2017-05-04 Guangzhou Fullriver Battery New Technology Co., Ltd. Method and system for equalizing and matching lithium secondary batteries
DE102017221825A1 (en) * 2017-12-04 2019-06-06 Audi Ag Method for controlling an electrical system of an electrically driven motor vehicle
CN110015174A (en) * 2017-08-31 2019-07-16 比亚迪股份有限公司 Battery equalization method, system, vehicle, storage medium and electronic equipment
CN110015169A (en) * 2017-08-31 2019-07-16 比亚迪股份有限公司 Battery equalization method, system, vehicle, storage medium and electronic equipment
CN110401247A (en) * 2019-08-07 2019-11-01 贾明钋 A kind of active equalization of battery method
CN110525269A (en) * 2019-04-25 2019-12-03 吉林大学 The battery pack balancing control method of SOC
CN210337646U (en) * 2019-05-05 2020-04-17 金华职业技术学院 Electric quantity equalization processing equipment for electric automobile

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170125857A1 (en) * 2011-12-26 2017-05-04 Guangzhou Fullriver Battery New Technology Co., Ltd. Method and system for equalizing and matching lithium secondary batteries
CN102946479A (en) * 2012-11-02 2013-02-27 惠州Tcl移动通信有限公司 Method for mobile terminal to update electric quantity of battery and mobile terminal
CN104426180A (en) * 2013-08-28 2015-03-18 国家电网公司 Equalization control chip and equalization control method
EP3114493A1 (en) * 2014-03-07 2017-01-11 Renault S.A.S. Method for assessing a state of charge of a battery comprising a plurality of cells having a variable range of use of state of charge
CN104505550A (en) * 2014-12-25 2015-04-08 宁德时代新能源科技有限公司 Passive equalizing method and system for lithium iron phosphate battery pack
CN104865533A (en) * 2015-04-30 2015-08-26 江苏中辆科技有限公司 High-precision display method for state of charge (SOC) of on-vehicle power supply
CN205039569U (en) * 2015-09-02 2016-02-17 国网上海市电力公司 Lithium ion battery organizes balanced management system
CN105610209A (en) * 2015-10-21 2016-05-25 金龙联合汽车工业(苏州)有限公司 Passive equalization method of battery pack
CN105811500A (en) * 2016-03-17 2016-07-27 哈尔滨工业大学 Balance control method for lithium-ion battery pack
CN106208235A (en) * 2016-08-18 2016-12-07 联方云天科技(北京)有限公司 The forecast Control Algorithm that a kind of lithium cell charging passively equalizes
CN106300545A (en) * 2016-09-22 2017-01-04 华中科技大学 A kind of active equalization for liquid metal cell controls device and control method
CN106340926A (en) * 2016-09-29 2017-01-18 中国科学院广州能源研究所 Lithium battery equalization control strategy optimization method
CN110015174A (en) * 2017-08-31 2019-07-16 比亚迪股份有限公司 Battery equalization method, system, vehicle, storage medium and electronic equipment
CN110015169A (en) * 2017-08-31 2019-07-16 比亚迪股份有限公司 Battery equalization method, system, vehicle, storage medium and electronic equipment
DE102017221825A1 (en) * 2017-12-04 2019-06-06 Audi Ag Method for controlling an electrical system of an electrically driven motor vehicle
CN110525269A (en) * 2019-04-25 2019-12-03 吉林大学 The battery pack balancing control method of SOC
CN210337646U (en) * 2019-05-05 2020-04-17 金华职业技术学院 Electric quantity equalization processing equipment for electric automobile
CN110401247A (en) * 2019-08-07 2019-11-01 贾明钋 A kind of active equalization of battery method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022088591A1 (en) * 2020-10-28 2022-05-05 广州汽车集团股份有限公司 Method and system for estimating equilibrium state of battery pack of new energy vehicle
CN112339610A (en) * 2020-10-29 2021-02-09 东风汽车集团有限公司 New energy vehicle power battery charging and discharging control system and method
CN112339610B (en) * 2020-10-29 2022-02-11 东风汽车集团有限公司 New energy vehicle power battery charging and discharging control system and method
CN114578785A (en) * 2022-01-28 2022-06-03 徐州徐工挖掘机械有限公司 Power limit control method and system for electric engineering machinery
CN114578785B (en) * 2022-01-28 2024-03-01 徐州徐工挖掘机械有限公司 Power limiting control method and system for electric engineering machinery

Also Published As

Publication number Publication date
CN111469713B (en) 2021-11-12

Similar Documents

Publication Publication Date Title
CN111469713B (en) Passive equalization control method for new energy automobile power battery
CN106340926B (en) Lithium battery Balance route policy optimization method
CN109143099B (en) Method and device for estimating health condition of battery system
CN109446619B (en) Optimization method of design parameters of lithium ion battery electrode
CN109017381B (en) Composite balance control method for power battery pack
CN111239611A (en) Calculation method for calibrating PACKSOC based on single battery capacity
CN112213641A (en) Battery management system and method for obtaining remaining time
Lv et al. Influence of equalization on LiFePO4 battery inconsistency
CN107490768B (en) Lithium battery heating current obtaining method based on capacity attenuation and electric quantity consumption
CN110362897B (en) Multi-objective optimization balancing method for series battery packs
CN115021361A (en) Equalizing method for ternary lithium-lithium iron phosphate hybrid battery pack
CN113602148B (en) Balanced duration management method for full-time balancing
CN110794306A (en) Lithium iron phosphate SOC terminal correction method
CN110854959A (en) Passive equalization method for battery system
CN113829957A (en) Battery equalization evaluation method for charging new energy battery
CN112213649B (en) Method and system for constructing open-circuit voltage curve
CN117172028A (en) Efficient balance calculation method based on lithium iron phosphate cell unbalance model
CN108446494B (en) Equalization algorithm for battery module or system
CN114879053B (en) Method for predicting service life of energy storage lithium iron phosphate battery
CN115939543A (en) Self-adaptive method for charging current and charging initial temperature of lithium ion power battery system
CN115911617A (en) Passive equalization method of battery pack
CN113707960B (en) Method for quickly charging lithium ion power battery
CN115102248A (en) Battery equalization method and device, terminal equipment and storage medium
CN114290959B (en) Active life control method and system for power battery and computer readable storage medium
CN117013665B (en) Energy storage system adjusting method, computer medium, energy storage system and power generation system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant