CN103682519A - Method for heating low-temperature environment of electric vehicle - Google Patents
Method for heating low-temperature environment of electric vehicle Download PDFInfo
- Publication number
- CN103682519A CN103682519A CN201310716384.2A CN201310716384A CN103682519A CN 103682519 A CN103682519 A CN 103682519A CN 201310716384 A CN201310716384 A CN 201310716384A CN 103682519 A CN103682519 A CN 103682519A
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- heating
- obc
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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
-
- 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
-
- 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)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a method for heating the low-temperature environment of an electric vehicle. The method comprises the following steps: if a judgment result shows that the lowest temperature in a battery is lower than a first preset temperature in the charging process, controlling an OBC (On-Board Charger) to stop charging and begin heating until the lowest temperature in the battery is heated to a temperature which is higher than or equal to a second preset temperature, and controlling the battery to be continuously charged; after the OBC stops charging under the control of a BMS (Battery Management System), judging whether the lowest temperature in the battery is higher than or equal to a third preset temperature; if yes, confirming that the charging process is finished by the BMS; otherwise, controlling the OBC to enter a heating and heat preserving state and carrying out heat preserving timing; when the counted heat preserving time reaches a first preset time, controlling the OBC to terminate the heating and heat preserving state and confirming that the charging is finished. The method for heating the low-temperature environment of the electric vehicle has the advantages that the application temperature range of the electric vehicle is enlarged, the battery can still be normally charged when the ambient temperature is low in a heating mode, and a heat preserving means is adopted after the battery is charged full.
Description
Technical field
The present invention relates to electric automobile low temperature environment heating means.
Background technology
Pure electric automobile is in the north in winter, and in the environment of-20 ℃, the activity of battery is lower, and battery discharge current reduces; In the environment of-30 ℃, 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, limited popularization and the use of electric automobile, can not respond well the policy of national new-energy automobile.
Summary of the invention
The object of the present invention is to provide a kind of electric automobile low temperature environment heating means that guarantee that battery still can normally be worked in the situation that ambient temperature is lower.
Electric automobile low temperature environment heating means, comprise the following steps:
Step 1: if the ceiling voltage of cell is less than default maximum charging voltage in the process of charging, and BMS judgement inside battery minimum temperature is while being less than the first preset temperature, controls OBC and stops charging and start to heat; Step 2: in the process of heating, when judgement inside battery minimum temperature is more than or equal to the second preset temperature, BMS controls OBC and 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 while being less than specified charging current, BMS controls OBC and stops charging.Wherein, in step 3, when controlling OBC, BMS stops after charging, can perform step four: 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 and enter heating and thermal insulation state, and be incubated timing, when insulation timing time reaches the first Preset Time, control OBC and stop heating and thermal insulation state and confirm having charged; The 3rd preset temperature is more than or equal to the second preset temperature.
Preferably, in step 1, when BMS control OBC heats, first BMS sends heating request to OBC, the heating request of OBC response BMS, when judgement battery output end voltage is less than rated output voltage, the heating circuit of closed battery also notifies BMS to heat, and making BMS modification state is heated condition.
Preferably, when BMS receives the heating notice of OBC, while confirming that heating circuit electric current is not 0A, by status modifier, be heated condition.
Preferably, in step 2, when BMS controls OBC and stops heating, first BMS sends and stops heating request to OBC, and OBC response OBC stops heating request, and the heating circuit that disconnects battery also notifies BMS to stop heating, makes BMS modification state for heated condition not.
Preferably, described the first preset temperature value-1 degree Celsius is to 2 degrees Celsius, 4 degrees Celsius to 6 degrees Celsius of described the second preset temperature values.
Preferably, described the first Preset Time value is 0.5 hour to 3 hours.
Preferably, in described heating and thermal insulation state, first described OBC heats, and when the temperature difference of BMS judgement inside battery maximum temperature and minimum temperature is more than or equal to the first default temperature difference, controls OBC and suspends heating, makes battery standing the second Preset Time; After the second Preset Time arrives, the described temperature difference of judgement is less than or equal to and when second temperature difference and inside battery minimum temperature are less than the 4th preset temperature, continues heating; Described the 4th preset temperature is more than or equal to the 3rd preset temperature.Preferably, the described first 15 to 25 degrees Celsius of default temperature difference values, the described second 5 to 14 degrees Celsius of default temperature difference values.Preferably, described the 4th preset temperature value is 6 to 10 degrees Celsius.
Electric automobile low temperature environment heating means of the present invention have been widened the temperature limit of electric motor car, and the mode by heating, has guaranteed that power brick is in optimum temperature range, and battery can still can normally be worked when ambient temperature is lower.
Embodiment
Below in conjunction with specific embodiment, electric automobile low temperature environment heating means of the present invention are described in further detail.
Electric automobile low temperature environment heating means of the present invention are applied in existing electric automobile, this electric automobile power battery group, battery management system (the BATTERY MANAGEMENT SYSTEM that battery pack is managed, BMS) and Vehicular charger (On Board Charger, OBC).OBC is controlled by BMS, is mainly used in controlling charge circuit and the heating circuit of power battery pack.This heating circuit comprises a plurality of heaters, for power battery pack is heated, 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 (we are called specified charging current the charging current in this stage) more than 3A, when reaching maximum charging voltage and enter continuation of the journey state, charging current is less than 3A.
Electric automobile low temperature environment heating means of the present invention mainly comprise following four steps.
Step 1: if the ceiling voltage of cell is less than default maximum charging voltage in the process of charging, and BMS judgement inside battery minimum temperature is while being less than the first preset temperature, controls OBC and stops charging and start to heat.Wherein the first preset temperature is-1 ℃ to 2 ℃, is 0 ℃ in the present embodiment.
Concrete, when BMS control OBC heats, BMS sends heating request to OBC.The heating request of OBC response BMS, when judgement battery output end voltage is less than rated output voltage 60V, the heating circuit of closed battery also notifies BMS to heat, and making BMS modification state is heated condition.In some side circuits, BMS, when sending heating request to OBC, needs the thermal relay that adds of first closed its control, and needs during OBC closed-loop path high-voltage relay in closed-loop path to connect loop, also be that BMS and OBC cooperation just can be connected heating circuit, guarantee the fail safe of circuit operation.In addition when BMS receives the heating notice of OBC, when confirming heating circuit electric current not for 0A, by status modifier, be just heated condition, to guarantee that battery pack is really in heated condition.
Step 2: in the process of heating, when judgement inside battery minimum temperature is more than or equal to the second preset temperature, BMS controls OBC and stops heating and entering charged state.Wherein the second preset temperature is greater than the first preset temperature.The second 4 degrees Celsius of preset temperature values are to 6 degrees Celsius.In the present embodiment, be 5 ℃.
Concrete, when BMS controls OBC and stops heating, first BMS sends and stops heating request to OBC, and OBC response OBC stops heating request, and the heating circuit that disconnects battery also notifies BMS to stop heating, makes BMS modification state for heated condition not.Then, BMS sends request charging instruction to OBC.The charging request of OBC response BMS, and charging for battery pack, and just feed back in charge notification to BMS.BMS receives after the feedback of charging, and need to check that always road electric current be not 0A, then to revise current state be charged state.
In some side circuits, OBC needs the high-voltage relay in cutoff circuit while disconnecting heating circuit.BMS receive OBC feedback stop heating notice time, disconnect the thermal relay that adds of its control, and the state of revising is for heated condition not.BMS sends request to OBC the positive and negative electrode relay on charge circuit that is positioned at that charging instruction needs closed its control before.OBC, when being batteries charging, also needs the high-voltage relay on charge circuit that is positioned at of closed its control.
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 while being less than specified charging current 3A, BMS controls OBC and stops charging.
In this process, the communication process between BMS and OBC and step 1 and step 2 are similar, and both want co-ordination, guarantee stability and the fail safe of circuit operation.For example, BMS will send request to OBC, makes feedback after OBC operation, BMS receive to confirm after feedback always road electric current be whether 0A again modification state be uncharged state etc.
In addition, in step 3, BMS control OBC stops after charging, can perform step four: 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 and enter heating and thermal insulation state, and be incubated timing, when insulation timing time reaches the first Preset Time, control OBC and stop heating and thermal insulation state and confirm having charged.The 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.The first Preset Time value 0.5 hour, to 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 is more than or equal to the first default temperature difference, control OBC and suspend heating, make battery standing the second Preset Time, overheated to prevent some cell.Wherein the first default temperature difference value is 15 to 25 degrees Celsius, is 20 ℃ in the present embodiment.The 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, reach the first Preset Time, stop heating and thermal insulation state and confirm having charged.If battery standing finishes rear insulation timing, do not reach yet the first Preset Time, and the temperature difference of maximum temperature and minimum temperature is less than the second default temperature difference, continuation heating when inside battery minimum temperature is greater than the 3rd preset temperature but is less than the 4th temperature simultaneously.Wherein the second default temperature difference value is 5 to 14 degrees Celsius, and the present embodiment is 10 ℃.The 4th preset temperature is more than or equal to the 3rd preset temperature, can value 6 to 10 degrees Celsius, in the present embodiment, be 8 ℃.
Electric automobile low temperature environment heating means of the present invention have been widened the temperature limit of electric motor car, and the mode by heating, has guaranteed that power brick is in optimum temperature range, and battery can still can normally be charged when ambient temperature is lower; After battery is full of electricity, use Insulation, guarantee 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 such substituting, improve and change are all included in the spirit and scope of attached claim.
Claims (9)
1. electric automobile low temperature environment heating means, is characterized in that comprising the following steps:
Step 1: if the ceiling voltage of cell is less than default maximum charging voltage in the process of charging, and BMS judgement inside battery minimum temperature is while being less than the first preset temperature, controls OBC and stops charging and start to heat;
Step 2: in the process of heating, when judgement inside battery minimum temperature is more than or equal to the second preset temperature, BMS controls OBC and 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 while being less than specified charging current, BMS controls OBC and stops charging;
Wherein, in step 3, when controlling OBC, BMS stops after charging, can perform step four: 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 and enter heating and thermal insulation state, and be incubated timing, when insulation timing time reaches the first Preset Time, control OBC and stop heating and thermal insulation state and confirm having charged; The 3rd preset temperature is more than or equal to the second preset temperature.
2. electric automobile low temperature environment heating means according to claim 1, it is characterized in that, in step 1, when BMS control OBC heats, first BMS sends heating request to OBC, and the heating request of OBC response BMS, when judgement battery output end voltage is less than rated output voltage, the heating circuit of closed battery also notifies BMS to heat, and making BMS modification state is heated condition.
3. electric automobile low temperature environment heating means according to claim 2, is characterized in that, when BMS receives the heating notice of OBC, while confirming that heating circuit electric current is not 0A, by status modifier, are heated condition.
4. electric automobile low temperature environment heating means according to claim 1, it is characterized in that, in step 2, when BMS control OBC stops heating, first BMS sends and stops heating request to OBC, OBC response OBC stops heating request, and the heating circuit that disconnects battery also notifies BMS to stop heating, makes BMS modification state for heated condition not.
5. electric automobile low temperature environment heating means according to claim 1, is characterized in that, described the first preset temperature value-1 degree Celsius is to 2 degrees Celsius, 4 degrees Celsius to 6 degrees Celsius of described the second preset temperature values.
6. electric automobile low temperature environment heating means according to claim 1, is characterized in that, described the first Preset Time value 0.5 hour to 3 hours.
7. electric automobile low temperature environment heating means according to claim 1, it is characterized in that, in described heating and thermal insulation state, first described OBC heats, when the temperature difference of BMS judgement inside battery maximum temperature and minimum temperature is more than or equal to the first default temperature difference, control OBC and suspend heating, make battery standing the second Preset Time; After the second Preset Time arrives, the described temperature difference of judgement is less than or equal to and when second temperature difference and inside battery minimum temperature are less than the 4th preset temperature, continues heating; Described the 4th preset temperature is more than or equal to the 3rd preset temperature.
8. electric automobile low temperature environment heating means according to claim 7, is characterized in that, the described first 15 to 25 degrees Celsius of default temperature difference values, the described second 5 to 14 degrees Celsius of default temperature difference values.
9. electric automobile low temperature environment heating means according to claim 7, is characterized in that, 6 to 10 degrees Celsius of described the 4th preset temperature values.
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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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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN104900935A (en) * | 2015-06-02 | 2015-09-09 | 安徽江淮汽车股份有限公司 | Charging heat management control method of battery pack |
| JP2016105672A (en) * | 2014-12-01 | 2016-06-09 | トヨタ自動車株式会社 | Power storage system and control method therefor |
| 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 |
| CN106803299A (en) * | 2017-03-14 | 2017-06-06 | 广州创想科技股份有限公司 | Environment self-adaption control of bluetooth access control device and method |
| CN107331923A (en) * | 2017-06-27 | 2017-11-07 | 北京新能源汽车股份有限公司 | Electric automobile power battery temprature control method and device |
| CN108445400A (en) * | 2018-02-09 | 2018-08-24 | 惠州市亿能电子有限公司 | A kind of remaining charging time evaluation method 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 |
| US10661663B2 (en) | 2016-02-04 | 2020-05-26 | Cps Technology Holdings, Llc | Battery system temperature and charge adjustment system and method |
| 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 |
| CN111769606A (en) * | 2020-06-15 | 2020-10-13 | 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 |
| 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 |
| CN112751099A (en) * | 2020-12-30 | 2021-05-04 | 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 |
| CN113161650A (en) * | 2021-04-13 | 2021-07-23 | 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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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| US20170324118A1 (en) * | 2014-12-01 | 2017-11-09 | Toyota Jidosha Kabushiki Kaisha | Power storage system and method for controlling the same |
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| CN107004916B (en) * | 2014-12-01 | 2019-07-05 | 丰田自动车株式会社 | Accumulating system and its control method |
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| CN104900935A (en) * | 2015-06-02 | 2015-09-09 | 安徽江淮汽车股份有限公司 | 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 |
| 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 |
| CN106803299A (en) * | 2017-03-14 | 2017-06-06 | 广州创想科技股份有限公司 | Environment self-adaption control of bluetooth access control device and method |
| CN107331923A (en) * | 2017-06-27 | 2017-11-07 | 北京新能源汽车股份有限公司 | Electric automobile power battery temprature control method and device |
| 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 |
| CN108445400A (en) * | 2018-02-09 | 2018-08-24 | 惠州市亿能电子有限公司 | A kind of remaining charging time evaluation method 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 |
| CN111769606A (en) * | 2020-06-15 | 2020-10-13 | 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 |
| 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 |
| CN112751099A (en) * | 2020-12-30 | 2021-05-04 | 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 |
| 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 |
| CN113161650A (en) * | 2021-04-13 | 2021-07-23 | 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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