CN102479983A - Charging control method and device for electric vehicle power battery - Google Patents

Charging control method and device for electric vehicle power battery Download PDF

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Publication number
CN102479983A
CN102479983A CN2010105770194A CN201010577019A CN102479983A CN 102479983 A CN102479983 A CN 102479983A CN 2010105770194 A CN2010105770194 A CN 2010105770194A CN 201010577019 A CN201010577019 A CN 201010577019A CN 102479983 A CN102479983 A CN 102479983A
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China
Prior art keywords
power battery
electric automobile
automobile power
temperature
battery
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CN2010105770194A
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Chinese (zh)
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CN102479983B (en
Inventor
彭阿勇
汤小华
李帅辉
李伟铭
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比亚迪股份有限公司
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Priority to CN201010577019.4A priority Critical patent/CN102479983B/en
Publication of CN102479983A publication Critical patent/CN102479983A/en
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    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses a charging control method for an electric vehicle power battery, wherein the charging method comprises the following steps: detecting the temperature of the electric vehicle power battery; determining whether the temperature of the electric vehicle power battery is less than the preset minimum temperature value; charging and discharging for the electric vehicle power battery continuously in a switching mode if the temperature of the electric vehicle power battery is less than the preset minimum temperature value; and charging for the electric vehicle power battery only if the temperature of the electric vehicle power battery is not less than the minimum temperature value. According to the invention, the electric vehicle power battery is charged and heated by adopting the continuously charging and discharging method in the switching mode under the lower temperature condition, the charging for the power battery is realized on the premises of no damage of the power battery, the utilization ratio of the power battery is improved, and the service life of the power battery is prolonged; and additionally, the use temperature range of the power battery is expanded, thus the use regionalism of the electric vehicle using the type of the power battery becomes much wider.

Description

The charge control method and the device that are used for electric automobile power battery
Technical field
The present invention relates to the electric vehicle engineering field, particularly a kind of charge control method and device that is used for electric automobile power battery.
Background technology
Because ferric phosphate lithium cell has a lot of advantages, for example, long service life, capacity be big, electric current discharges and recharges etc. greatly, and is therefore common with the electrokinetic cell of ferric phosphate lithium cell as electric automobile.Yet inventor of the present invention prior art is studied with practice process in find: the poor performance of ferric phosphate lithium cell during at low temperature; Generally speaking; For single only electric core, its capability retention at 0 ℃ is about 60%~70%, is about 40%~55% at-10 ℃ capability retentions; Capability retention at-20 ℃ is about 20%~40%, and is 100% at 23 ℃ capability retention.Such cryogenic property obviously can not satisfy the instructions for use of electrical source of power.In addition, when low temperature, battery is charged, the transition metal oxide that can make battery include lithium reacts, the precipitating metal lithium.And because this reaction is irreversible, even battery temperature returns to normal working temperature, lithium metal also can't get in the circulation that discharges and recharges once more, thereby causes the permanent reduction of battery capacity, finally causes battery to damage.And, because the accumulation of lithium metal makes and harm such as battery in use is short-circuited has easily also reduced simultaneously the fail safe of battery.Therefore,, not only battery can't be full of, but also the permanent reduction of battery capacity can be caused if when low temperature, electrokinetic cell is charged.
Summary of the invention
The object of the invention is intended to solve at least one of above-mentioned technological deficiency, proposes a kind of control method of under low temperature condition, electric automobile power battery being charged and device.
For achieving the above object, one aspect of the present invention proposes a kind of charge control method that is used for electric automobile power battery, may further comprise the steps: the temperature that detects electric automobile power battery; Whether the temperature of judging said electric automobile power battery is less than predefined minimum temperature value; If the temperature of judging said electric automobile power battery less than said minimum temperature value, then to constantly charging and the discharge of said electric automobile power battery with switching; And if the temperature of judging said electric automobile power battery is not less than said minimum temperature value, then only said electric automobile power battery is charged.
The present invention proposes a kind of battery charge controller that is used for electric automobile power battery on the other hand, comprises controller and current transformer.Wherein, Said controller is used to detect the temperature of said electric automobile power battery; And whether the temperature of judging said electric automobile power battery less than predefined minimum temperature value, and controls current transformer according to the result of said judgement and said electric automobile power battery is charged and/or discharge; Said current transformer is used for said electric automobile power battery is charged and/or discharging according to the judged result of said controller.
The present invention charges to electrokinetic cell through the mode that under low temperature condition, adopts constantly switching ground charging and discharge and heats; Realized under the prerequisite of not damaging battery, electrokinetic cell being charged; Improve the utilance of electrokinetic cell, prolonged the useful life of electrokinetic cell.In addition, enlarged the serviceability temperature scope of electrokinetic cell, thereby the use region of the electric automobile of feasible this type of electrokinetic cell of use is more extensive.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the flow chart of the charge control method that is used for electric automobile power battery of the embodiment of the invention; And
Fig. 2 is the structural representation of the battery charge controller that is used for electric automobile power battery of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
Be illustrated in figure 1 as the flow chart of the charge control method that is used for electric automobile power battery of the embodiment of the invention, this method may further comprise the steps:
Step S101, the electric weight of detection electric automobile power battery.
Step S102 judges whether electric automobile power battery is full of.
In an instance of the present invention, before charging, can at first detect the electric weight of electrokinetic cell, judge whether electrokinetic cell is full of.If judge electrokinetic cell underfill electricity, just begin execution in step S103, electrokinetic cell is charged; If judge that electrokinetic cell has been full of electricity, then electrokinetic cell is not charged, to prevent battery the being caused damage useful life of minimizing battery.
Step S103, the temperature of detection electric automobile power battery.
Step S104, whether the temperature of judging detected electric automobile power battery is less than predefined minimum temperature value.
In one embodiment of the invention, the minimum temperature that preestablishes electric automobile power battery is 20 ℃, should be understood that this is merely schematic embodiment, is not limited to the present invention, in addition, also can set other minimum temperature value.
Step S105 is if the temperature of judging electric automobile power battery less than predefined minimum temperature value, then to constantly charging and discharge of electric automobile power battery with switching.
Step S106 is not less than predefined minimum temperature value if judge the temperature of electric automobile power battery, then only electric automobile power battery is charged.
In one embodiment of the invention, when the temperature of electrokinetic cell is lower than 20 ℃, send charge command to current transformer; Current transformer charges to electrokinetic cell, and the charging interval continues 2 seconds, sends the discharge order to current transformer then; Continue 1 second discharge time; According to such charging interval: discharge time=2: 1 time scale, constantly switch the order that discharges and recharges, electrokinetic cell constantly discharges and recharges.Like this, because the existence of the internal resistance of cell, the discharging of pulsed in charging process can produce heat; The temperature of rising electrokinetic cell, and along with the raising of temperature of powered cell, resistance internal resistance meeting reduces; Ion activity can increase, and battery capacity can increase, and does not just have lithium metal and separates out.When temperature of powered cell reaches 20 ℃, electrokinetic cell is in the optimal charge state basically, and after this capacity restoration to 100% only charges to electrokinetic cell, is full of electricity until electric automobile power battery, stops charging.
Should understand; Said method is merely schematic embodiment; Be not limited to the present invention, those skilled in the art also can make other according to above-mentioned thought and be equal to replacement and change, for example; Change charging interval and/or discharge time etc., these are revised and conversion all should be included in protection scope of the present invention.
In order to realize the foregoing description, the present invention also provides a kind of battery charge controller that is used for electric automobile power battery.
Be illustrated in figure 2 as the structural representation of the battery charge controller that is used for electric automobile power battery of the embodiment of the invention, this device comprises controller 10 and current transformer 20.Controller 10 is used to detect the temperature of electric automobile power battery; And whether the temperature of judging electric automobile power battery less than predefined minimum temperature value, and controls 20 pairs of electric automobile power batteries of current transformer according to the result who judges and charge and/or discharge.Current transformer 20 is used for electric automobile power battery is charged and/or discharging according to the judged result of controller 10.
In one embodiment of the invention, controller 10 can comprise temperature detecting module 110, temperature judge module 120 and control module 130.Temperature detecting module 110 is used to detect the temperature of electric automobile power battery.Whether the temperature that temperature judge module 120 is used to judge detected electric automobile power battery is less than the minimum temperature value; In one embodiment of the invention, the minimum temperature value is 20 ℃, should understand; This is merely schematic embodiment, is not limited to the present invention.Control module 130 is used for charging and/or discharging according to 20 pairs of electric automobile power batteries of the judged result of temperature judge module 120 control current transformer.
Particularly; If the temperature that temperature judge module 120 is judged electric automobile power battery is less than the minimum temperature value, then control module 130 control current transformers 20 discharge and recharge time ratio to constantly charging and discharge of electric automobile power battery, in one embodiment of the invention with preset with switching; The preset time ratio that discharges and recharges is 2: 1; Should be understood that this is merely schematic embodiment, is not limited to the present invention; If temperature judge module 120 judges that the temperature of detected electric automobile power battery is not less than the minimum temperature value, then control module 130 20 in current transformers of control charge to electric automobile power battery.Should be understood that this is merely schematic embodiment, is not limited to the present invention.
In one embodiment of the invention, controller 10 also can comprise electric weight detection module 140 and electric weight judge module 150.Electric weight detection module 140 is used to detect the electric weight of electric automobile power battery.Electric weight judge module 150 is used to judge whether electric automobile power battery is full of.If electric weight judge module 150 judges that electric automobile power battery has been full of electricity, then electric automobile power battery is not charged.If electric weight judge module 150 is judged electric automobile power battery underfill electricity, then temperature detecting module 110 detects the temperature of electronic electric automobile power battery, begins to charge, and is full of electricity until electric automobile power battery, stops charging.
The present invention charges to electrokinetic cell through the mode that under low temperature condition, adopts constantly switching ground charging and discharge and heats; Realized under the prerequisite of not damaging battery, electrokinetic cell being charged; Improve the utilance of electrokinetic cell, prolonged the useful life of electrokinetic cell.In addition, enlarged the serviceability temperature scope of electrokinetic cell, thereby the use region of the electric automobile of feasible this type of electrokinetic cell of use is more extensive.
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can carry out multiple variation, modification, replacement and modification that scope of the present invention is accompanying claims and be equal to and limit to these embodiment.

Claims (13)

1. a charge control method that is used for electric automobile power battery is characterized in that, may further comprise the steps:
Detect the temperature of electric automobile power battery;
Whether the temperature of judging said electric automobile power battery is less than predefined minimum temperature value;
If the temperature of judging said electric automobile power battery less than said minimum temperature value, then to constantly charging and the discharge of said electric automobile power battery with switching; And
Be not less than said minimum temperature value if judge the temperature of said electric automobile power battery, then said electric automobile power battery charged.
2. the charge control method that is used for electric automobile power battery according to claim 1 is characterized in that, before the temperature of said detection electric automobile power battery, also comprises:
The electric weight that detects said electric automobile power battery is to judge whether said electric automobile power battery is full of;
Be full of electricity if judge said electric automobile power battery, then said electric automobile power battery do not charged.
3. the charge control method that is used for electric automobile power battery according to claim 1 is characterized in that, said to said electric automobile power battery constantly with switching the charging and the discharge specifically comprise:
Discharge and recharge time ratio to constantly charging and the discharge of said electric automobile power battery with preset with switching.
4. the charge control method that is used for electric automobile power battery according to claim 3 is characterized in that, wherein, the said time ratio that discharges and recharges is 2: 1.
5. the charge control method that is used for electric automobile power battery according to claim 1 is characterized in that, said minimum temperature value is 20 ℃.
6. a battery charge controller that is used for electric automobile power battery is characterized in that, comprising:
Controller; Be used to detect the temperature of said electric automobile power battery; And whether the temperature of judging said electric automobile power battery less than predefined minimum temperature value, and controls current transformer according to the result of said judgement and said electric automobile power battery is charged and/or discharge; And
Said current transformer is used for said electric automobile power battery is charged and/or discharging according to the judged result of said controller.
7. the battery charge controller that is used for electric automobile power battery according to claim 6 is characterized in that, said controller further comprises:
Temperature detecting module is used to detect the temperature of said electric automobile power battery;
The temperature judge module, whether the temperature that is used to judge said detected electric automobile power battery is less than said minimum temperature value;
Control module is used for controlling said current transformer according to the judged result of said judge module and said electric automobile power battery is charged and/or discharges.
8. the battery charge controller that is used for electric automobile power battery according to claim 7 is characterized in that, said minimum temperature value is 20 ℃.
9. the battery charge controller that is used for electric automobile power battery according to claim 7; It is characterized in that said control module is controlled said current transformer according to the judged result of said temperature judge module and said electric automobile power battery is charged and/or discharges further comprised:
If said temperature judge module is judged the temperature of said detected electric automobile power battery less than said minimum temperature value, then said control module is controlled said current transformer to constantly charging and the discharge of said electric automobile power battery with switching;
If said judge module is judged the temperature of said detected electric automobile power battery and is not less than said minimum temperature value that then said control module is controlled said current transformer and only said electric automobile power battery charged.
10. the battery charge controller that is used for electric automobile power battery according to claim 7 is characterized in that, said control module control said current transformer to said electric automobile power battery constantly with switching the charging and the discharge further comprise:
Said control module is controlled said current transformer and is discharged and recharged time ratio to constantly charging and the discharge of said electric automobile with preset with switching.
11. the battery charge controller that is used for electric automobile power battery according to claim 10 is characterized in that, wherein, the said time ratio that discharges and recharges is 2: 1.
12. the battery charge controller that is used for electric automobile power battery according to claim 7 is characterized in that, said controller also comprises:
The electric weight detection module is used to detect the electric weight of said electric automobile power battery; And
The electric weight judge module is used for judging according to the electric weight of said detected electric automobile power battery whether said electric automobile power battery is full of.
13. the battery charge controller that is used for electric automobile power battery according to claim 12; It is characterized in that; If said electric weight judge module judges that said electric automobile power battery is full of electricity, then said controller is controlled said current transformer and said electric automobile power battery is not charged.
CN201010577019.4A 2010-11-30 2010-11-30 For charge control method and the device of electric automobile power battery CN102479983B (en)

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Cited By (12)

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CN103117421A (en) * 2013-03-07 2013-05-22 清华大学 Low-temperature battery charging method
WO2014176980A1 (en) * 2013-04-28 2014-11-06 华为终端有限公司 Charging method, device and electronic device
WO2014206368A1 (en) * 2013-06-28 2014-12-31 Shenzhen Byd Auto R&D Company Limited Power system for electric vehicle, electric vehicle and method for charging power battery
CN104779652A (en) * 2014-01-09 2015-07-15 同济大学 Power battery charger by using AC charging and discharging for quick preheating
CN104935020A (en) * 2014-03-17 2015-09-23 比亚迪股份有限公司 Wireless charging system for electric vehicle and wireless charging method thereof
CN105098272A (en) * 2015-07-13 2015-11-25 惠州亿纬锂能股份有限公司 Safe charging method and apparatus for lithium secondary battery
CN105223460A (en) * 2015-09-18 2016-01-06 苏州工业园区职业技术学院 A kind of pick-up unit of electrokinetic cell exception
CN105337381A (en) * 2014-08-07 2016-02-17 镇江利明电器有限公司 Intelligent alternating current/direct current full-off electric vehicle charger
CN106602168A (en) * 2016-12-01 2017-04-26 安徽鸿创新能源动力有限公司 Thermal management system for battery pack of electric vehicle and control method
CN107394284A (en) * 2016-05-16 2017-11-24 铃木株式会社 The battery control device of vehicle
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CN109216794A (en) * 2017-06-29 2019-01-15 青岛恒金源电子科技有限公司 A kind of operation method of base station battery pack

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Publication number Priority date Publication date Assignee Title
CN103117421A (en) * 2013-03-07 2013-05-22 清华大学 Low-temperature battery charging method
WO2014176980A1 (en) * 2013-04-28 2014-11-06 华为终端有限公司 Charging method, device and electronic device
WO2014206368A1 (en) * 2013-06-28 2014-12-31 Shenzhen Byd Auto R&D Company Limited Power system for electric vehicle, electric vehicle and method for charging power battery
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CN104779652A (en) * 2014-01-09 2015-07-15 同济大学 Power battery charger by using AC charging and discharging for quick preheating
CN104779652B (en) * 2014-01-09 2017-01-25 同济大学 Power battery charger by using AC charging and discharging for quick preheating
CN104935020A (en) * 2014-03-17 2015-09-23 比亚迪股份有限公司 Wireless charging system for electric vehicle and wireless charging method thereof
CN104935020B (en) * 2014-03-17 2017-09-29 比亚迪股份有限公司 Wireless charging system and wireless charging method for electric automobile
CN105337381A (en) * 2014-08-07 2016-02-17 镇江利明电器有限公司 Intelligent alternating current/direct current full-off electric vehicle charger
CN105337381B (en) * 2014-08-07 2019-06-21 镇江利明电器有限公司 Intelligent alternating current-direct current turns off electric car charger entirely
CN105098272A (en) * 2015-07-13 2015-11-25 惠州亿纬锂能股份有限公司 Safe charging method and apparatus for lithium secondary battery
CN105098272B (en) * 2015-07-13 2017-07-18 惠州亿纬锂能股份有限公司 A kind of safe lithium secondary battery charging method
CN105223460A (en) * 2015-09-18 2016-01-06 苏州工业园区职业技术学院 A kind of pick-up unit of electrokinetic cell exception
CN107394284A (en) * 2016-05-16 2017-11-24 铃木株式会社 The battery control device of vehicle
CN106602168A (en) * 2016-12-01 2017-04-26 安徽鸿创新能源动力有限公司 Thermal management system for battery pack of electric vehicle and control method
CN109216794A (en) * 2017-06-29 2019-01-15 青岛恒金源电子科技有限公司 A kind of operation method of base station battery pack

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