CN103682519B - Low-temperature environment of electric vehicle heating means - Google Patents
Low-temperature environment of electric vehicle heating means Download PDFInfo
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- CN103682519B CN103682519B CN201310716384.2A CN201310716384A CN103682519B CN 103682519 B CN103682519 B CN 103682519B CN 201310716384 A CN201310716384 A CN 201310716384A CN 103682519 B CN103682519 B CN 103682519B
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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
- 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
- H01M10/446—Initial charging measures
-
- 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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention relates to a kind of low-temperature environment of electric vehicle heating means, if be included in when judging that inside battery minimum temperature is less than the first preset temperature in the process of charging, then control OBC stops charging starting to heat, to inside battery minimum temperature be heated to be more than or equal to the second preset temperature time, then control battery continue charging.After BMS control OBC stops charging, judge whether inside battery minimum temperature is more than or equal to the 3rd preset temperature, if it is BMS confirms that charging process completes, otherwise control OBC enters heating and thermal insulation state, and carry out insulation timing, stop heating and thermal insulation state when being incubated control OBC when timing time reaches the first Preset Time and confirming charging complete.Low-temperature environment of electric vehicle heating means of the present invention have widened the temperature limit of electric motor car, by the mode of heating, battery still normally can be charged when ambient temperature is lower, after battery is full of electricity, uses Insulation.
Description
Technical field
The present invention relates to low-temperature environment of electric vehicle heating means.
Background technology
Pure electric automobile is in the north in winter, and in the environment of-20 DEG C, the activity of battery is lower, and battery discharge current reduces; In the environment of-30 DEG C, even cannot start, this is the characteristic of lithium ion battery.Current electric automobile major part do not have heating function or heating effect undesirable, limit popularization and the use of electric automobile, the policy of new-energy automobile of country can not be responded well.
Summary of the invention
The object of the present invention is to provide a kind of low-temperature environment of electric vehicle heating means that battery still can normally work at low ambient temperatures that ensure.
A kind of low-temperature environment of electric vehicle heating means, comprise the following steps:
Step one: if the ceiling voltage of cell is less than default maximum charging voltage in the process of charging, and when BMS judges that inside battery minimum temperature is less than the first preset temperature, then control OBC stops charging starting to heat; Step 2: in the process of heating, when judging that inside battery minimum temperature is more than or equal to the second preset temperature, BMS control OBC stops heating and entering charged state; Wherein the second preset temperature is greater than the first preset temperature; And step 3: in the process of charging, if the ceiling voltage of cell is more than or equal to default maximum charging voltage or total loop electric current when being less than rated charge stream, BMS controls OBC stops charging.Wherein, in step 3, after BMS control OBC stops charging, step 4 can be performed: judge whether inside battery minimum temperature is more than or equal to the 3rd preset temperature, if it is BMS confirms that charging process completes, otherwise control OBC enters heating and thermal insulation state, and carry out insulation timing, stop heating and thermal insulation state when being incubated control OBC when timing time reaches the first Preset Time and confirming charging complete; 3rd preset temperature is more than or equal to the second preset temperature.
Preferably, in step, when BMS control OBC heats, first BMS sends heat request to OBC, OBC responds the heat request of BMS, when judging that battery output voltage is less than rated output voltage, close the heating circuit of battery and notify that BMS heats, making BMS revise state is heated condition.
Preferably, when BMS receives the heating notice of OBC, when confirming that heating circuit electric current is not 0A, be heated condition by status modifier.
Preferably, in step 2, when BMS control OBC stops heating, first BMS sends stopping heat request to OBC, and OBC responds the stopping heat request of OBC, disconnects the heating circuit of battery and notifies that BMS stops heating, makes BMS revise state for non-heated condition.
Preferably, described first preset temperature value-1 degree Celsius to 2 degrees Celsius, described second preset temperature value 4 degrees Celsius to 6 degrees Celsius.
Preferably, described first Preset Time value 0.5 is little of 3 hours.
Preferably, in described heating and thermal insulation state, first described OBC heats, and when BMS judges that the temperature difference of inside battery maximum temperature and minimum temperature is more than or equal to the first default temperature difference, control OBC suspends heating, makes battery standing second Preset Time; Second Preset Time judge after arriving that the described temperature difference is less than or equal to second temperature difference and inside battery minimum temperature is less than the 4th preset temperature time continue to heat; Described 4th preset temperature is more than or equal to the 3rd preset temperature.Preferably, described first presets temperature difference value 15 to 25 degrees Celsius, and described second presets temperature difference value 5 to 14 degrees Celsius.Preferably, described 4th preset temperature value 6 to 10 degrees Celsius.
Low-temperature environment of electric vehicle heating means of the present invention have widened the temperature limit of electric motor car, by the mode of heating, ensure that power brick is in optimum temperature range, battery still can normally be worked when ambient temperature is lower.
Embodiment
Below in conjunction with specific embodiment, low-temperature environment of electric vehicle heating means of the present invention are described in further detail.
Low-temperature environment of electric vehicle heating means of the present invention are applied in existing electric automobile, this electric automobile power battery group, the battery management system (BATTERYMANAGEMENTSYSTEM that battery pack is managed, and Vehicular charger (OnBoardCharger, OBC) BMS).OBC controls by BMS, is mainly used in the charge circuit and the heating circuit that control power battery pack.This heating circuit comprises multiple heater, for heating power battery pack, can adopt existing heater.
In the present embodiment, the rated output voltage of power battery pack is 60V, the maximum charging voltage of cell is 3.7V, when cell charges normal, its charging current is in more than 3A (charging current in this stage we be called rated charge stream), when reaching maximum charging voltage and entering continuation of the journey state, charging current is less than 3A.
Low-temperature environment of electric vehicle heating means of the present invention mainly comprise following four steps.
Step one: if the ceiling voltage of cell is less than default maximum charging voltage in the process of charging, and when BMS judges that inside battery minimum temperature is less than the first preset temperature, then control OBC stops charging starting to heat.Wherein the first preset temperature is-1 DEG C to 2 DEG C, is 0 DEG C in the present embodiment.
Concrete, when BMS control OBC heats, BMS sends heat request to OBC.OBC responds the heat request of BMS, when judging that battery output voltage is less than rated output voltage 60V, closes the heating circuit of battery and notifies that BMS heats, and making BMS revise state is heated condition.In some side circuits, BMS is when sending heat request to OBC, and what first need close its control adds thermal relay, and needs the high-voltage relay in closed-loop path to connect loop during OBC closed-loop path, also namely BMS and OBC cooperation just can connect heating circuit, guarantees the fail safe that circuit runs.In addition, when BMS receives the heating notice of OBC, when confirming that heating circuit electric current is not 0A, status modifier is heated condition by, to guarantee that battery pack is in heated condition really.
Step 2: in the process of heating, when judging that inside battery minimum temperature is more than or equal to the second preset temperature, BMS control OBC stops heating and entering charged state.Wherein the second preset temperature is greater than the first preset temperature.Second preset temperature value 4 degrees Celsius is to 6 degrees Celsius.In the present embodiment be 5 DEG C.
Concrete, when BMS control OBC stops heating, first BMS sends stopping heat request to OBC, and OBC responds the stopping heat request of OBC, disconnects the heating circuit of battery and notifies that BMS stops heating, makes BMS revise state for non-heated condition.Then, BMS sends request charging instruction to OBC.OBC responds the charge request of BMS, and charges for battery pack, and feed back just in charge notification to BMS.After BMS receives the feedback of charging, need check that always road electric current is not 0A, then to revise current state be charged state.
In some side circuits, when OBC disconnects heating circuit, need the high-voltage relay in cutoff circuit.When BMS receives the stopping heating notice of OBC feedback, what disconnect its control adds thermal relay, and state of revising is for non-heated condition.BMS needed the closed positive and negative electrode relay be positioned on charge circuit that it controls before OBC sends request charging instruction.OBC, when for batteries charging, also needs the closed high-voltage relay be positioned on charge circuit that it controls.
Step 3: in the process of charging, if the ceiling voltage of cell is more than or equal to default maximum charging voltage 3.7V or total loop electric current when being less than rated charge stream 3A, BMS controls OBC stops charging.
In this process, the communication process between BMS and OBC and step one and step 2 similar, both want co-ordination, guarantee the stability that circuit runs and fail safe.Such as, BMS will send request to OBC, makes feedback after OBC operation, will confirm that always whether road electric current is that to revise state be again uncharged state etc. to 0A after BMS receives feedback.
In addition, after in step 3, BMS control OBC stops charging, step 4 can be performed: judge whether inside battery minimum temperature is more than or equal to the 3rd preset temperature, if it is BMS confirms that charging process completes, otherwise control OBC enters heating and thermal insulation state, and carry out insulation timing, stop heating and thermal insulation state when being incubated control OBC when timing time reaches the first Preset Time and confirming charging complete.3rd preset temperature is more than or equal to the second preset temperature, and in the present embodiment, the 3rd preset temperature equals the second preset temperature.First Preset Time value 0.5 is little of 3 hours, is 2 hours in the present embodiment.
Especially, in heating and thermal insulation state, first OBC can heat, and the real-time monitoring battery internal temperature of BMS, when the temperature difference of inside battery maximum temperature and minimum temperature be more than or equal to first preset the temperature difference time, control OBC suspends heating, makes battery standing second Preset Time, to prevent some cell overheated.Wherein first preset temperature difference value 15 to 25 degrees Celsius, in the present embodiment, be 20 DEG C.Second Preset Time value 0.1 to 1 hour is 0.5 hour in the present embodiment.If be incubated timing in the process of battery standing to reach the first Preset Time, then stop heating and thermal insulation state and confirm charging complete.If battery standing terminates rear insulation timing do not reach the first Preset Time yet, and the temperature difference of maximum temperature and minimum temperature is less than the second default temperature difference, continues heating when inside battery minimum temperature is greater than the 3rd preset temperature but is less than the 4th temperature simultaneously.Wherein second preset temperature difference value 5 to 14 degrees Celsius, the present embodiment is 10 DEG C.4th preset temperature is more than or equal to the 3rd preset temperature, can value 6 to 10 degrees Celsius, is 8 DEG C in the present embodiment.
Low-temperature environment of electric vehicle heating means of the present invention have widened the temperature limit of electric motor car, by the mode of heating, ensure that power brick is in optimum temperature range, battery still can normally be charged when ambient temperature is lower; After battery is full of electricity, uses Insulation, guarantees that battery can normally work.
Although the description of this invention carries out in conjunction with above specific embodiment, those skilled in the art can carry out many replacements, modifications and variations, be apparent according to above-mentioned content.Therefore, all like this substitute, improve and change be all included in the spirit and scope of attached claim.
Claims (8)
1. low-temperature environment of electric vehicle heating means, is characterized in that comprising the following steps:
Step one: if the ceiling voltage of cell is less than default maximum charging voltage in the process of charging, and when BMS judges that inside battery minimum temperature is less than the first preset temperature, then control OBC stops charging starting to heat;
Step 2: in the process of heating, when judging that inside battery minimum temperature is more than or equal to the second preset temperature, BMS control OBC stops heating and entering charged state; Wherein the second preset temperature is greater than the first preset temperature;
Step 3: in the process of charging, if the ceiling voltage of cell is more than or equal to default maximum charging voltage or total loop electric current when being less than rated charge stream, BMS controls OBC stops charging;
Wherein, in step 3, after BMS control OBC stops charging, step 4 can be performed: judge whether inside battery minimum temperature is more than or equal to the 3rd preset temperature, if it is BMS confirms that charging process completes, otherwise control OBC enters heating and thermal insulation state, and carry out insulation timing, stop heating and thermal insulation state when being incubated control OBC when timing time reaches the first Preset Time and confirming charging complete; 3rd preset temperature is more than or equal to the second preset temperature;
In step one, when BMS control OBC heats, first BMS sends heat request to OBC, OBC responds the heat request of BMS, when judging that battery output voltage is less than rated output voltage, close the heating circuit of battery and notify that BMS heats, making BMS revise state is heated condition.
2. low-temperature environment of electric vehicle heating means according to claim 1, is characterized in that, when BMS receives the heating notice of OBC, when confirming that heating circuit electric current is not 0A, are heated condition by status modifier.
3. low-temperature environment of electric vehicle heating means according to claim 1, it is characterized in that, in step 2, when BMS control OBC stops heating, first BMS sends stopping heat request to OBC, OBC responds the stopping heat request of OBC, disconnects the heating circuit of battery and notifies that BMS stops heating, makes BMS revise state for non-heated condition.
4. low-temperature environment of electric vehicle heating means according to claim 1, is characterized in that, described first preset temperature value-1 degree Celsius to 2 degrees Celsius, described second preset temperature value 4 degrees Celsius to 6 degrees Celsius.
5. low-temperature environment of electric vehicle heating means according to claim 1, is characterized in that, described first Preset Time value 0.5 is little of 3 hours.
6. low-temperature environment of electric vehicle heating means according to claim 1, it is characterized in that, in described heating and thermal insulation state, first described OBC heats, when BMS judges that the temperature difference of inside battery maximum temperature and minimum temperature is more than or equal to the first default temperature difference, control OBC suspends heating, makes battery standing second Preset Time; Second Preset Time judge after arriving that the described temperature difference is less than or equal to second temperature difference and inside battery minimum temperature is less than the 4th preset temperature time continue to heat; Described 4th preset temperature is more than or equal to the 3rd preset temperature.
7. low-temperature environment of electric vehicle heating means according to claim 6, is characterized in that, described first presets temperature difference value 15 to 25 degrees Celsius, and described second presets temperature difference value 5 to 14 degrees Celsius.
8. low-temperature environment of electric vehicle heating means according to claim 6, is characterized in that, described 4th preset temperature value 6 to 10 degrees Celsius.
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| CN201310716384.2A CN103682519B (en) | 2013-12-23 | 2013-12-23 | Low-temperature environment of electric vehicle heating means |
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| CN201310716384.2A CN103682519B (en) | 2013-12-23 | 2013-12-23 | Low-temperature environment of electric vehicle heating means |
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| CN103682519B true CN103682519B (en) | 2016-03-23 |
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| CN104393357A (en) * | 2014-11-03 | 2015-03-04 | 惠州市亿能电子有限公司 | Charging method of power battery of electric vehicle |
| JP6330639B2 (en) * | 2014-12-01 | 2018-05-30 | トヨタ自動車株式会社 | Power storage system and control method thereof |
| CN104900935B (en) * | 2015-06-02 | 2017-03-22 | 安徽江淮汽车集团股份有限公司 | Charging heat management control method of battery pack |
| US10661663B2 (en) | 2016-02-04 | 2020-05-26 | Cps Technology Holdings, Llc | Battery system temperature and charge adjustment system and method |
| CN105922880B (en) * | 2016-05-03 | 2018-10-16 | 北京新能源汽车股份有限公司 | Charging control method and system for power battery of electric automobile |
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| CN107331923A (en) * | 2017-06-27 | 2017-11-07 | 北京新能源汽车股份有限公司 | Temperature control method and device for power battery of electric vehicle |
| CN108445400B (en) * | 2018-02-09 | 2020-06-26 | 惠州市亿能电子有限公司 | Method for estimating residual charging time of battery pack |
| CN109358672A (en) * | 2018-09-28 | 2019-02-19 | 厦门科华恒盛股份有限公司 | A kind of low-temperature heating system, header box and photovoltaic generating system |
| CN109768352A (en) * | 2019-01-17 | 2019-05-17 | 重庆长安汽车股份有限公司 | A kind of battery method for heating and controlling, device, equipment and the system of electric car |
| CN112072218A (en) * | 2019-06-10 | 2020-12-11 | 北京新能源汽车股份有限公司 | Heating control method and device for 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 |
| CN111769606B (en) * | 2020-06-15 | 2022-04-01 | 上海动力储能电池系统工程技术有限公司 | Charging control method and system of composite power supply system |
| CN112751099B (en) * | 2020-12-30 | 2022-03-11 | 广州橙行智动汽车科技有限公司 | Battery heating system detection method and device, vehicle and storage medium |
| CN113161650B (en) * | 2021-04-13 | 2022-11-01 | 安徽交通职业技术学院 | Self-heat-preservation control method for power battery of new energy bus |
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