CN104393357A - Charging method of power battery of electric vehicle - Google Patents
Charging method of power battery of electric vehicle Download PDFInfo
- Publication number
- CN104393357A CN104393357A CN201410607257.3A CN201410607257A CN104393357A CN 104393357 A CN104393357 A CN 104393357A CN 201410607257 A CN201410607257 A CN 201410607257A CN 104393357 A CN104393357 A CN 104393357A
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- temperature
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- heating mode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charging method of a power battery of an electric vehicle. The charging method comprises the following steps: S1, detecting the maximal temperature and the minimal temperature of a battery, and judging whether the minimal temperature is lower than a first threshold temperature or not, if so, executing a step S2; if not, continuing to judge whether the minimal temperature is higher than a second threshold temperature or not, if so, executing a step S4, if not, executing a step S3; S2, entering a pure-heating mode; S3, entering a charging and heating mode; and S4, entering a pure-heating mode. According to the charging method of the power battery of the electric vehicle, provided by the invention, the power battery at low temperature is charged, the power battery enters different charging procedures according to the minimal temperature of the battery, namely, the pure-charging mode, the heating and charging mode and the pure-charging mode, so that the low-temperature charging and heating time can be shortened, and the rapid charging of the battery is ensured.
Description
Technical field
The present invention relates to electric vehicle engineering field, particularly relate to a kind of charging method of electric automobile power battery.
Background technology
Ferric phosphate lithium cell has many advantages, and such as, long service life, capacity be large, can carry out discharge and recharge etc. by big current, therefore usual using the electrokinetic cell of ferric phosphate lithium cell as electric automobile.And northerly winter, in the ferric phosphate lithium cell charging process of pure electric automobile, need heat, just can heat battery after being heated to uniform temperature, such heating time will unusual length! In heating process, often due to the reason of heater element distribution, and the reason of temperature acquisition point arrangement, in heating process, power brick internal difference in temperature can be very large, for the consideration to battery protection, in heating means usually when the temperature difference is greater than certain threshold values, heating and charging process will be stopped, thus cause the prolongation in heating and charging interval; And judging whether heating process completes is all judge according to minimum temperature, and when power brick heat insulation effect is bad, maximum temperature reaches more than 20 DEG C, minimum temperature sometimes also can below 0 DEG C, and such temperature is unbalanced also extends the charging interval.
Summary of the invention
The object of the present invention is to provide a kind of charging method of electric automobile power battery, the electrokinetic cell under low temperature is charged, the low-temperature charging heating time can be shortened, guarantee that battery is full of fast.
For achieving the above object, the invention provides a kind of charging method of electric automobile power battery, comprise the following steps:
Step S1, detect the highest, the minimum temperature of battery, and judge whether minimum temperature is less than the first threshold temperature, this first threshold temperature is the minimum temperature entering charging limit, limit heating mode, if then perform step S2; If not then continue to judge whether minimum temperature is greater than the second threshold temperature, this second threshold temperature is leave the maximum temperature of charging limit, limit heating mode or enter the minimum temperature of pure charge mode, if then perform step S4, if not then perform step S3;
Step S2, enters pure heating mode: closed add thermal relay and heat battery; Enter Inner eycle blower fan and whether open determination strategy, when being heated to minimum temperature and being more than or equal to the 3rd threshold temperature, perform step S3, otherwise, continue to perform step S2; 3rd threshold temperature is the start-up temperature being entered charging limit, limit heating mode by pure heating mode or pure charge mode;
Step S3, enters charging limit, limit heating mode: close and add thermal relay to heat battery, and closed positive and negative electrode relay is to charge to battery; Enter Inner eycle blower fan and whether open determination strategy; When being heated to minimum temperature and being more than or equal to the second threshold temperature, disconnect and add thermal relay, perform step S4;
Otherwise, continue to perform step S3;
Step S4, enters pure charge mode: closed positive and negative electrode relay is to charge until be full of to battery; Monitor the highest, the minimum temperature of battery simultaneously, when minimum temperature is less than the 3rd threshold temperature, and when the electric current being greater than threshold values H being detected, then closedly add thermal relay, performing step S3, this threshold values H is the current boundary value preventing from battery from crossing putting.
Further, this first threshold temperature is-3 ~ 2 DEG C, and this second threshold temperature is 2 ~ 7 DEG C, and the 3rd threshold temperature is 0 ~ 5 DEG C.
Further, threshold values H is 1 ~ 10A.
Further, in pure heating mode or charging limit, limit heating mode, whether Inner eycle blower fan opens determination strategy is: when the temperature difference is greater than T1, then open Inner eycle blower fan, otherwise do not open Inner eycle blower fan; After Inner eycle blower fan is opened, when the temperature difference is less than T2, then close Inner eycle blower fan, otherwise Inner eycle blower fan is held open state, wherein T2 < T1.
Further, T1 is 3 ~ 9 DEG C, and T2 is 1 ~ 7 DEG C.
Further, in the heating mode of charging limit, limit, charging current increases and corresponding increase with temperature.
Further, in pure heating mode, the highest, the minimum temperature of Real-Time Monitoring battery, stops charging when the temperature difference is greater than when the temperature difference crosses secondary failure; When the temperature difference is less than excessive temperature differentials level fault, re-execute step S1.
Further, in the heating mode of charging limit, limit, the highest, the minimum temperature of Real-Time Monitoring battery, stops charging when the temperature difference is greater than when the temperature difference crosses secondary failure; When the temperature difference is less than excessive temperature differentials level fault, re-execute step S1.
Beneficial effect of the present invention: the charging method of electric automobile power battery of the present invention, electrokinetic cell under low temperature is charged, first judge to enter different charging flows according to battery minimum temperature, i.e. pure charge mode, limit heating edge charge mode and pure charge mode, the low-temperature charging heating time can be shortened, guarantee that battery is full of fast.And according to temperature difference situation that is the highest, minimum temperature in pure heating mode and limit heating edge charge mode, judge whether to open Inner eycle blower fan, the temperature in power brick is tended to balance, thus shorten heating time.
Accompanying drawing explanation
Fig. 1 is the flow chart of the charging method of electric automobile power battery of the present invention;
Fig. 2 is whether Inner eycle blower fan opens determination strategy flow chart.
Embodiment
Mechanism of the present invention and operation principle is described in detail below in conjunction with accompanying drawing.In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.The corresponding same or analogous parts of same or analogous label.
Refer to shown in Fig. 1 and Fig. 2, the invention provides a kind of charging method of electric automobile power battery, comprise the following steps:
Step S1, detect the highest, the minimum temperature of battery, and judge whether minimum temperature is less than the first threshold temperature, this first threshold temperature is the minimum temperature entering charging limit, limit heating mode, if then perform step S2; If not then continue to judge whether minimum temperature is greater than the second threshold temperature, this second threshold temperature is leave the maximum temperature of charging limit, limit heating mode or enter the minimum temperature of pure charge mode, if then perform step S4, if not then perform step S3.This first threshold temperature is-3 ~ 2 DEG C, and this second threshold temperature is 2 ~ 7 DEG C, in the present embodiment, and this first threshold temperature is 0 DEG C, and this second threshold temperature is 5 DEG C.
Step S2, enters pure heating mode: closed add thermal relay and heat battery, and battery management system sends request call for heat, sends pure heat temperature raising state simultaneously.The highest, the minimum temperature of Real-Time Monitoring battery, now, enters Inner eycle blower fan and whether opens determination strategy, to ensure the temperature equalization in power brick.When being heated to minimum temperature and being more than or equal to the 3rd threshold temperature, closed positive and negative electrode relay, to charge, performs step S3, namely enters limit heating edge charge mode; Otherwise, continue to perform step S2.3rd threshold temperature is the start-up temperature being entered charging limit, limit heating mode by pure heating mode or pure charge mode, and the 3rd threshold temperature is 0 ~ 5 DEG C, and in the present embodiment, the 3rd threshold temperature is 3 DEG C.
In this pure heating mode, whether described Inner eycle blower fan opens determination strategy is specially: when the temperature difference is greater than T1, then open Inner eycle blower fan, the temperature of power brick inside is tended to balance, also accelerates the diffusion of power brick temperature simultaneously, make minimum temperature close to maximum temperature, thus shorten heating time, otherwise Inner eycle blower fan keeps closed condition, returns Inner eycle blower fan and whether opens determination strategy; After Inner eycle blower fan is opened, in power brick, the temperature difference reduces gradually, when the temperature difference is less than T2, temperature in power brick is close, then close Inner eycle blower fan, with saves energy, otherwise Inner eycle blower fan is held open state, continue the highest, the minimum temperature in monitoring battery bag, wherein T2 < T1.T1 is the temperature controlling the unlatching of Inner eycle blower fan, and T2 is the temperature controlling the closedown of Inner eycle blower fan, and the concrete numerical value of T1, T2 sets according to the thermal field in power brick, and in the present embodiment, T1 is 3 ~ 9 DEG C, and T2 is 1 ~ 7 DEG C.
In addition, according to temperature difference failure judgement state, charging is stopped, to protect rechargeable battery when the temperature difference is greater than when the temperature difference crosses secondary failure; When the temperature difference is less than excessive temperature differentials level fault, rejudges the flow process of charging, namely re-execute step S1.
Step S3, enters charging limit, limit heating mode: close and add thermal relay to heat battery, and closed positive and negative electrode relay is to charge to battery; If enter this charging limit, limit heating mode by pure heating mode, be in closure state owing to adding thermal relay, as long as then close positive and negative electrode relay.In this charging limit, limit heating mode, battery management system sends charge requirement electric current according to the highest, minimum temperature, charger is according to battery management system demand charging current, the charging current that adjustment exports, low current charge is adopted when temperature is lower, charging current corresponding increase when temperature is higher, with meet when take into account be full of, control the charging interval.The highest, the minimum temperature of Real-Time Monitoring battery, now, enters Inner eycle blower fan and whether opens determination strategy, to ensure the temperature equalization in power brick.When being heated to minimum temperature and being more than or equal to the second threshold temperature, disconnect and add thermal relay, and send insulation the finish command, perform step S4; Otherwise, continue to perform step S3.
In this charging limit, limit heating mode, it is identical with pure heating mode whether described Inner eycle blower fan opens determination strategy, and detailed process is just see the above.
In addition, according to temperature difference failure judgement state, charging is stopped when the temperature difference is greater than when the temperature difference crosses secondary failure; When the temperature difference is less than excessive temperature differentials level fault, rejudges the flow process of charging, namely re-execute step S1.
Step S4, enters pure charge mode: closed positive and negative electrode relay is to charge until be full of to battery.The highest, the minimum temperature of charging process Real-Time Monitoring battery, when minimum temperature is less than the 3rd threshold temperature, and when the electric current being greater than threshold values H being detected, then closes and adds thermal relay, perform step S3, namely enter charging limit, limit heating mode.Cross for preventing battery and put, the electric current that heating uses must can only be the foreign current that charger provides, and the electric current of battery can not be used to heat, this threshold values H is the current boundary value preventing from battery from crossing putting, its concrete numerical value is arranged calibration situation during correcting current according to hardboard, in the present embodiment, threshold values H is 1 ~ 10A.When entering into charging limit, limit heating mode again by pure charge mode, when the electric current being greater than threshold values H must be detected, could close and add thermal relay, prevent battery discharge from heating heating plate, thus the danger causing battery to cross to put.
In above whole charging flow, power-supply management system according to the various malfunction of fault judgment method real-time report, and takes corresponding fault handling method according to fault level.
In sum, the charging method of electric automobile power battery of the present invention, electrokinetic cell under low temperature is charged, first judge to enter different charging flows according to battery minimum temperature, i.e. pure charge mode, limit heating edge charge mode and pure charge mode, the low-temperature charging heating time can be shortened, guarantee that battery is full of fast.And according to temperature difference situation that is the highest, minimum temperature in pure heating mode and limit heating edge charge mode, judge whether to open Inner eycle blower fan, the temperature in power brick is tended to balance, thus shorten heating time.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection range that all should be included in the claims in the present invention.
Claims (8)
1. a charging method for electric automobile power battery, is characterized in that, comprises the following steps:
Step S1, detect the highest, the minimum temperature of battery, and judge whether minimum temperature is less than the first threshold temperature, this first threshold temperature is the minimum temperature entering charging limit, limit heating mode, if then perform step S2; If not then continue to judge whether minimum temperature is greater than the second threshold temperature, this second threshold temperature is leave the maximum temperature of charging limit, limit heating mode or enter the minimum temperature of pure charge mode, if then perform step S4, if not then perform step S3;
Step S2, enters pure heating mode: closed add thermal relay and heat battery; Enter Inner eycle blower fan and whether open determination strategy, when being heated to minimum temperature and being more than or equal to the 3rd threshold temperature, perform step S3, otherwise, continue to perform step S2; 3rd threshold temperature is the start-up temperature being entered charging limit, limit heating mode by pure heating mode or pure charge mode;
Step S3, enters charging limit, limit heating mode: close and add thermal relay to heat battery, and closed positive and negative electrode relay is to charge to battery; Enter Inner eycle blower fan and whether open determination strategy; When being heated to minimum temperature and being more than or equal to the second threshold temperature, disconnect and add thermal relay, perform step S4;
Otherwise, continue to perform step S3;
Step S4, enters pure charge mode: closed positive and negative electrode relay is to charge until be full of to battery; Monitor the highest, the minimum temperature of battery simultaneously, when minimum temperature is less than the 3rd threshold temperature, and when the electric current being greater than threshold values H being detected, then closedly add thermal relay, performing step S3, this threshold values H is the current boundary value preventing from battery from crossing putting.
2. the charging method of electric automobile power battery according to claim 1, is characterized in that, this first threshold temperature is-3 ~ 2 DEG C, and this second threshold temperature is 2 ~ 7 DEG C, and the 3rd threshold temperature is 0 ~ 5 DEG C.
3. the charging method of electric automobile power battery according to claim 1, is characterized in that, threshold values H is 1 ~ 10A.
4. the charging method of electric automobile power battery according to claim 1, it is characterized in that, in pure heating mode or charging limit, limit heating mode, whether Inner eycle blower fan opens determination strategy is: when the temperature difference is greater than T1, then open Inner eycle blower fan, otherwise do not open Inner eycle blower fan; After Inner eycle blower fan is opened, when the temperature difference is less than T2, then close Inner eycle blower fan, otherwise Inner eycle blower fan is held open state, wherein T2 < T1.
5. the charging method of electric automobile power battery according to claim 4, is characterized in that, T1 is 3 ~ 9 DEG C, and T2 is 1 ~ 7 DEG C.
6. the charging method of electric automobile power battery according to claim 1, is characterized in that, in the heating mode of charging limit, limit, charging current increases and corresponding increase with temperature.
7. the charging method of electric automobile power battery according to claim 1, is characterized in that, in pure heating mode, the highest, the minimum temperature of Real-Time Monitoring battery, stops charging when the temperature difference is greater than when the temperature difference crosses secondary failure; When the temperature difference is less than excessive temperature differentials level fault, re-execute step S1.
8. the charging method of electric automobile power battery according to claim 1, is characterized in that, in the heating mode of charging limit, limit, the highest, the minimum temperature of Real-Time Monitoring battery, stops charging when the temperature difference is greater than when the temperature difference crosses secondary failure; When the temperature difference is less than excessive temperature differentials level fault, re-execute step S1.
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| CN201410607257.3A CN104393357A (en) | 2014-11-03 | 2014-11-03 | Charging method of power battery of electric vehicle |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449778A (en) * | 2015-12-31 | 2016-03-30 | 惠州市亿能电子有限公司 | Charging control circuit and control method |
| CN105922880A (en) * | 2016-05-03 | 2016-09-07 | 北京新能源汽车股份有限公司 | Charging control method and system for power battery of electric automobile |
| CN106252788A (en) * | 2016-08-24 | 2016-12-21 | 合肥国轩高科动力能源有限公司 | Low-temperature heating method and device for lithium battery |
| CN106394264A (en) * | 2016-05-27 | 2017-02-15 | 奇瑞汽车股份有限公司 | Method and device for quick charging of electric automobile |
| CN106785120A (en) * | 2016-12-29 | 2017-05-31 | 洛阳宝盈智控科技有限公司 | A kind of electric automobile power supply system charging heating control method |
| CN106965700A (en) * | 2017-04-28 | 2017-07-21 | 北京新能源汽车股份有限公司 | Electric automobile heating charging circuit and charging method |
| CN107331922A (en) * | 2016-04-28 | 2017-11-07 | 宝沃汽车（中国）有限公司 | Power battery charging heating system and control method, electrokinetic cell bag and vehicle |
| CN107878234A (en) * | 2017-11-09 | 2018-04-06 | 成都雅骏新能源汽车科技股份有限公司 | It is a kind of based on adaptive electrokinetic cell heating means |
| CN108859814A (en) * | 2018-05-24 | 2018-11-23 | 北京新能源汽车股份有限公司 | Charging control method and device for hybrid electric vehicle and vehicle |
| CN109742484A (en) * | 2018-12-21 | 2019-05-10 | 浙江零跑科技有限公司 | Batteries of electric automobile packet heating process |
| CN109830782A (en) * | 2017-11-23 | 2019-05-31 | 郑州深澜动力科技有限公司 | A kind of batteries of electric automobile driving method for heating and controlling |
| CN110767958A (en) * | 2019-10-23 | 2020-02-07 | 合肥国轩高科动力能源有限公司 | Method for controlling temperature difference by heating power battery |
| CN111391716A (en) * | 2020-03-10 | 2020-07-10 | 北京新能源汽车股份有限公司 | Vehicle control method and system and vehicle |
| CN111497672A (en) * | 2019-01-30 | 2020-08-07 | 北京新能源汽车股份有限公司 | Control method and device for vehicle charging thermal management |
| CN111725578A (en) * | 2020-06-04 | 2020-09-29 | 奇瑞商用车（安徽）有限公司 | Quick charging method for power battery in low-temperature state |
| CN111769338A (en) * | 2020-07-10 | 2020-10-13 | 陕西航空电气有限责任公司 | Method for charging storage battery by aviation power distribution product charger |
| CN111942228A (en) * | 2020-07-28 | 2020-11-17 | 中国第一汽车股份有限公司 | Low-temperature charging control system and control method for electric automobile |
| CN113078377A (en) * | 2021-03-16 | 2021-07-06 | 杭州鹏成新能源科技有限公司 | Thermal management method for forklift battery |
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| CN113665430A (en) * | 2021-09-24 | 2021-11-19 | 上汽通用五菱汽车股份有限公司 | Fast charging method and device adaptive to low-temperature environment and storage medium |
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| CN113928135A (en) * | 2021-11-25 | 2022-01-14 | 深圳市德力普电池科技有限公司 | Low-temperature charging method and system for lithium ion power battery and storage medium |
| CN114435190A (en) * | 2021-12-28 | 2022-05-06 | 重庆长安新能源汽车科技有限公司 | Battery thermal management control method and system, vehicle and storage medium |
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| CN105449778A (en) * | 2015-12-31 | 2016-03-30 | 惠州市亿能电子有限公司 | Charging control circuit and control method |
| CN107331922A (en) * | 2016-04-28 | 2017-11-07 | 宝沃汽车（中国）有限公司 | Power battery charging heating system and control method, electrokinetic cell bag and vehicle |
| CN107331922B (en) * | 2016-04-28 | 2019-09-20 | 宝沃汽车（中国）有限公司 | Power battery charging heating system and control method, power battery pack and vehicle |
| CN105922880A (en) * | 2016-05-03 | 2016-09-07 | 北京新能源汽车股份有限公司 | Charging control method and system for power battery of electric automobile |
| WO2017190475A1 (en) * | 2016-05-03 | 2017-11-09 | 北京新能源汽车股份有限公司 | Charging control method and control system of electric vehicle power battery |
| CN106394264A (en) * | 2016-05-27 | 2017-02-15 | 奇瑞汽车股份有限公司 | Method and device for quick charging of electric automobile |
| CN106394264B (en) * | 2016-05-27 | 2019-03-12 | 奇瑞汽车股份有限公司 | The method and apparatus that quick charge is carried out to electric car |
| CN106252788A (en) * | 2016-08-24 | 2016-12-21 | 合肥国轩高科动力能源有限公司 | Low-temperature heating method and device for lithium battery |
| CN106785120A (en) * | 2016-12-29 | 2017-05-31 | 洛阳宝盈智控科技有限公司 | A kind of electric automobile power supply system charging heating control method |
| CN106965700A (en) * | 2017-04-28 | 2017-07-21 | 北京新能源汽车股份有限公司 | Electric automobile heating charging circuit and charging method |
| CN107878234A (en) * | 2017-11-09 | 2018-04-06 | 成都雅骏新能源汽车科技股份有限公司 | It is a kind of based on adaptive electrokinetic cell heating means |
| CN109830782A (en) * | 2017-11-23 | 2019-05-31 | 郑州深澜动力科技有限公司 | A kind of batteries of electric automobile driving method for heating and controlling |
| CN109830782B (en) * | 2017-11-23 | 2021-06-01 | 郑州深澜动力科技有限公司 | Battery driving heating control method for electric automobile |
| CN108859814A (en) * | 2018-05-24 | 2018-11-23 | 北京新能源汽车股份有限公司 | Charging control method and device for hybrid electric vehicle and vehicle |
| CN109742484A (en) * | 2018-12-21 | 2019-05-10 | 浙江零跑科技有限公司 | Batteries of electric automobile packet heating process |
| CN111497672A (en) * | 2019-01-30 | 2020-08-07 | 北京新能源汽车股份有限公司 | Control method and device for vehicle charging thermal management |
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Application publication date: 20150304 |