CN102707234A - Estimation method for residual charging time of battery - Google Patents
Estimation method for residual charging time of battery Download PDFInfo
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- CN102707234A CN102707234A CN201210136153XA CN201210136153A CN102707234A CN 102707234 A CN102707234 A CN 102707234A CN 201210136153X A CN201210136153X A CN 201210136153XA CN 201210136153 A CN201210136153 A CN 201210136153A CN 102707234 A CN102707234 A CN 102707234A
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Abstract
The invention relates to an estimation method for residual charging time of a battery. The estimation method comprises the steps of: obtaining temperature of each battery unit by a temperature sensor arranged on each battery unit of a battery pack; obtaining voltage of each battery units by a sampling circuit; according to the voltage, obtaining the battery load state of the battery pack by a battery control unit; when battery load state value is smaller than a constant-current charging threshold value, calculating the residual charging time by the battery control unit according to the formula (1), otherwise, calculating the residual charging time by the battery control unit according to the formula (2), wherein the constant-current charging threshold is a threshold obtained when a charger converts from larger charging current into stable smaller charging current; and displaying the residual charging time by a display unit. The estimation method for residual charging time of the battery can estimate the residual charging time of the battery pack by utilizing the battery load state, battery temperature and battery capacity according to the charging rules of the battery, so that a battery management system is capable of displaying residual charging time, thus further providing support for application of other related parts.
Description
Technical field
The present invention relates to the battery performance assessment, particularly relate to a kind of electric battery residue duration of charging evaluation method.
Background technology
In large-scale accumulator system (like the wind-powered electricity generation accumulator system), people require battery management system can show the residue duration of charging at any time, come the prompting changing energy-storage module.In electric automobile was used, people had proposed higher demand to the intellectuality of electric automobile, required in charging, particularly when the charging station charging of rapid charge, can show the residue duration of charging.
Summary of the invention
Based on this, be necessary to provide a kind of electric battery residue duration of charging evaluation method, to obtain the electric battery residue duration of charging.
A kind of electric battery residue duration of charging evaluation method comprises step:
Obtain the temperature of each battery unit by the temperature sensor on each battery unit that is arranged on electric battery;
Obtain the voltage of each battery unit by sample circuit;
Battery control unit obtains the battery charge state of electric battery according to said voltage;
Battery control unit is at said battery charge state during less than the constant-current charge thresholding; Calculate the residue duration of charging according to formula (1); Otherwise calculate the residue duration of charging according to formula (2), wherein said constant-current charge thresholding is charging set changes stable less charging current into from big charging current a thresholding:
t=(THR-SOC)*C/(KT*C)+2%*C/0.1C (1)
t=(100%–SOC)*C/0.1C(2)
Wherein, t is the residue duration of charging, and THR is the constant-current charge thresholding, and SOC is a battery charge state, and C is a battery capacity, and T is a temperature, and K is a temperature coefficient;
Display unit shows the said residue duration of charging.
In a preferred embodiment, said constant-current charge thresholding is 98%.The charging current of battery control unit control charging set with big charging current for charging the time is the product of KT and battery capacity C, and the charging current during with stable less charging current for charging is 0.1 times a battery capacity.
Electric battery residue duration of charging evaluation method of the present invention is according to the rule of battery charge; Utilize battery charge state (SOC), battery temperature and battery capacity to estimate the residue duration of charging of electric battery; Make battery management system can show the residue duration of charging, for the application of relevant other part of on-vehicle battery provides support.
Embodiment
With specific embodiment invention electric battery residue duration of charging evaluation method is described in further detail below.
The inventive method is mainly used in the batteries management system; This batteries management system mainly comprises battery control unit (battery control unit; BCU); (battery management unit BMU), and is arranged on temperature sensor and the sample circuit on each battery unit for the watch-dog that links to each other with battery control unit and a plurality of battery management unit.Wherein, each battery unit can only comprise a cell, also can comprise a plurality of cells that couple together through parallel connection or series-parallel mode.Battery control unit links to each other with charging set through charging CAN when batteries charging, obtains the parameter of charging set and feeds back the battery management system control signal.A plurality of battery management units respectively be arranged on each battery unit on temperature sensor and sample circuit link to each other, and obtain the temperature and the voltage of each battery unit from temperature sensor and sample circuit.
In the present embodiment, electric battery adopts ferric phosphate lithium cell, and the charging process of electric battery is divided into two stages, and be the constant-current charge stage early stage, and the current charge stage falls in the later stage.The charging current in constant-current charge stage is bigger, and relevant with battery pack temperature, and it is less that the charging current in current charge stage falls in the later stage.The charging current of battery control unit control charging set with big charging current for charging the time is the product of K, T and battery capacity C, and the charging current during with stable less charging current for charging is 0.1 times a battery capacity.Wherein, T is a battery pack temperature, can adopt the electric battery medial temperature, also can adopt the minimum temperature in the electric battery.K is a temperature coefficient.
Electric battery residue duration of charging evaluation method of the present invention mainly may further comprise the steps:
Step 1 is by the temperature of each battery unit of temperature sensor acquisition;
Step 2 is by the voltage of each battery unit of sample circuit acquisition;
Step 3, the voltage that battery control unit obtains according to abovementioned steps obtain electric battery battery charge state (State of Charge, SOC); General, obtain the SOC of electric battery through the mode of tabling look-up;
Step 4, battery control unit when (being called the constant-current charge thresholding in the present embodiment), calculates residue duration of charging according to formula (1) less than a preset value at battery charge state, otherwise calculates the residue duration of charging according to formula (2):
t=(THR-SOC)*C/(KT*C)+2%*C/0.1C (1)
t=(100%–SOC)*C/0.1C?(2)
Wherein, the constant-current charge thresholding also is constant-current charge stage and the turning point that falls the current charge stage.T is the residue duration of charging in the formula, and THR is the constant-current charge thresholding, and SOC is a battery charge state, and C is a battery capacity;
Step 5, the residue duration of charging that the display unit step display four of watch-dog obtains.
In the present embodiment, constant-current charge thresholding THR is 98%.
Utilize electric battery residue duration of charging evaluation method of the present invention can estimate the residue duration of charging of the electric battery of forming by more piece SP cell.In the battery system that meets above-mentioned charging rule, can remain the calculating in duration of charging with the method.Thereby battery management system can have residue duration of charging prompting function, can help the staff rationally to arrange, coordinate charging equipment at quick charge station, large-scale energy storage station etc.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (3)
1. an electric battery residue duration of charging evaluation method is characterized in that, comprises step:
Obtain the temperature of each battery unit by the temperature sensor on each battery unit that is arranged on electric battery;
Obtain the voltage of each battery unit by sample circuit;
Battery control unit obtains the battery charge state of electric battery according to said voltage;
Battery control unit is at said battery charge state during less than the constant-current charge thresholding; Calculate the residue duration of charging according to formula (1); Otherwise calculate the residue duration of charging according to formula (2), wherein said constant-current charge thresholding is charging set changes stable less charging current into from big charging current a thresholding:
t=(THR-SOC)*C/(KT*C)+2%*C/0.1C (1)
t=(100%–SOC)*C/0.1C(2)
Wherein, t is the residue duration of charging, and THR is the constant-current charge thresholding, and SOC is a battery charge state, and C is a battery capacity, and T is a temperature, and K is a temperature coefficient;
Display unit shows the said residue duration of charging.
2. electric battery residue duration of charging evaluation method according to claim 1 is characterized in that said constant-current charge thresholding is 98%.
3. electric battery residue duration of charging evaluation method according to claim 2; It is characterized in that; The charging current of battery control unit control charging set with big charging current for charging the time is the product of KT and battery capacity C, and the charging current during with stable less charging current for charging is 0.1 times a battery capacity.
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CN103235266A (en) * | 2013-03-29 | 2013-08-07 | 重庆长安汽车股份有限公司 | Charging state estimation method and charging state estimation device of power batteries |
CN103728566A (en) * | 2013-12-20 | 2014-04-16 | 惠州市亿能电子有限公司 | Method for correcting SOC based on different temperature and rate charging curves |
CN105680541A (en) * | 2016-03-28 | 2016-06-15 | 西安特锐德智能充电科技有限公司 | Charging method for low-temperature charging strategy |
CN105988084A (en) * | 2015-01-30 | 2016-10-05 | 联想(北京)有限公司 | Information processing method and electronic device |
CN106487045A (en) * | 2015-08-24 | 2017-03-08 | 鸿富锦精密工业(武汉)有限公司 | Charging system and charging method |
CN107192960A (en) * | 2017-06-26 | 2017-09-22 | 北京普莱德新能源电池科技有限公司 | The method and device that a kind of remaining charging interval to battery is estimated |
CN108646190A (en) * | 2018-05-08 | 2018-10-12 | 宁德时代新能源科技股份有限公司 | Method, device and equipment for estimating residual charging time of battery |
CN110098439A (en) * | 2019-04-09 | 2019-08-06 | 浙江零跑科技有限公司 | A kind of method of power battery charging time Estimate |
CN110109024A (en) * | 2019-05-15 | 2019-08-09 | 广州小鹏汽车科技有限公司 | The prediction technique of battery charge time, device, battery management system |
CN110133506A (en) * | 2018-02-09 | 2019-08-16 | 宝山钢铁股份有限公司 | A kind of device and its calculation method using the time for calculating lithium battery residue |
CN110857035A (en) * | 2018-08-24 | 2020-03-03 | 宝沃汽车(中国)有限公司 | Method and device for determining charging remaining time and electric vehicle |
WO2020108638A1 (en) * | 2018-11-30 | 2020-06-04 | 宁德时代新能源科技股份有限公司 | Method, device and system for estimating remaining charging time and a storage medium |
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CN112557926A (en) * | 2020-12-04 | 2021-03-26 | 湖北亿纬动力有限公司 | Method and device for calculating residual charging time |
CN112798966A (en) * | 2020-12-30 | 2021-05-14 | 蜂巢能源科技有限公司 | Method and device for estimating remaining battery charging time, storage medium and electronic equipment |
CN114047448A (en) * | 2021-10-25 | 2022-02-15 | 安徽锐能科技有限公司 | Adaptive charging remaining time estimation method, device, system and storage medium |
DE102020210989A1 (en) | 2020-09-01 | 2022-03-03 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for determining a second charging time of a battery system |
WO2022078206A1 (en) * | 2020-10-13 | 2022-04-21 | 长城汽车股份有限公司 | Method and apparatus for determining remaining charging time, and vehicle |
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CN103235266B (en) * | 2013-03-29 | 2017-03-08 | 重庆长安汽车股份有限公司 | The charging state estimation method and a charging state estimation device of electrokinetic cell |
CN103728566A (en) * | 2013-12-20 | 2014-04-16 | 惠州市亿能电子有限公司 | Method for correcting SOC based on different temperature and rate charging curves |
CN103728566B (en) * | 2013-12-20 | 2016-08-24 | 惠州市亿能电子有限公司 | A kind of based on different temperatures with the method for multiplying power charging curve correction SOC |
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CN105680541B (en) * | 2016-03-28 | 2017-11-03 | 西安特锐德智能充电科技有限公司 | A kind of charging method of low temperature charging strategy |
CN105680541A (en) * | 2016-03-28 | 2016-06-15 | 西安特锐德智能充电科技有限公司 | Charging method for low-temperature charging strategy |
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