CN111048871B - Vehicle-mounted battery heating control method for electric automobile - Google Patents
Vehicle-mounted battery heating control method for electric automobile Download PDFInfo
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- CN111048871B CN111048871B CN201911180627.9A CN201911180627A CN111048871B CN 111048871 B CN111048871 B CN 111048871B CN 201911180627 A CN201911180627 A CN 201911180627A CN 111048871 B CN111048871 B CN 111048871B
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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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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Abstract
The invention discloses a vehicle-mounted battery heating control method for an electric vehicle, which presets a heating start battery residual capacity limit value, a heating direct start temperature limit value and a heating inquiry start temperature range for controlling the heating start of a battery through a battery management module BMS, determines whether to start a heating function by comparing the current battery residual capacity SOC with the heating start battery residual capacity limit value, and starts the inquiry heating function according to the current temperature when determining to start, thereby avoiding the phenomenon that a vehicle can run to a destination without using the heating function when running in a short distance, but the heating function is automatically started to cause electric energy loss, improving the heating controllability of the vehicle-mounted battery, effectively increasing the winter driving range of the electric vehicle, avoiding unnecessary repeated heating of the battery, being beneficial to ensuring the service life of the vehicle-mounted battery, being suitable for the vehicle-mounted battery heating control of various types of electric vehicles, the market competitiveness of the electric automobile is improved.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted battery management, in particular to a vehicle-mounted battery heating control method for an electric vehicle.
Background
The electric automobile has the advantages of energy conservation, environmental protection, convenience, flexibility and the like, is more and more popularized in use, but in northern areas, due to cold weather in winter, the effective capacity of the battery of the electric automobile is greatly reduced, the endurance mileage of the electric automobile is seriously influenced, and the electric automobile becomes one of the problems which are difficult to effectively solve in the field. With the development of electric vehicle technology, each electric vehicle manufacturer relieves the mileage problem of electric vehicles in cold weather in winter to a certain extent by adding a charging heating system, but the currently used charging heating system has the following defects in the actual control and use process because the control method is still imperfect:
firstly, the heating starting condition of the battery is single. For example, the heating start condition is set to be that the temperature is lower than a certain set value, and the heating start condition is directly started, because the user travel has uncertainty, if the travel is short-distance travel, and the electric quantity is sufficient, the battery heating function is started blindly, but the electric quantity of the battery is consumed, and the significance of guaranteeing the endurance mileage is not provided.
Secondly, the flexibility of battery heating starting is poor. In the process of driving, if the energy of the battery can ensure that the automobile reaches the destination in one stroke, the battery does not need to start the heating function at all, but the currently used heating control method does not consider the factor of the one stroke, and the unnecessary consumption of the electric quantity of the battery is also caused.
Therefore, it is necessary to design a new battery heating control strategy to avoid the above-mentioned defects, to avoid the power consumption of the battery to the maximum extent, and to enable the battery to start the heating function more reasonably, which is one of the problems to be solved in the art.
Disclosure of Invention
The invention aims to provide a vehicle-mounted battery heating control method for an electric vehicle, which has a more optimized and reasonable starting function of a battery heating function and avoids electric energy consumption to the greatest extent.
In order to solve the technical problem, the technical scheme of the invention is as follows: a vehicle-mounted battery heating control method for an electric vehicle is completed under the coordination of a battery management module BMS and a battery heating system of the electric vehicle, and comprises the following steps,
step one, presetting a heating starting battery residual capacity limit value, a heating direct starting temperature limit value and a heating inquiry starting temperature range for controlling the heating starting of the battery in the battery management module BMS;
step two, after the electric automobile opens the key, the battery management module BMS acquires the current temperature of the vehicle-mounted battery and the current battery residual capacity SOC;
step three, the battery management module BMS compares the current battery residual capacity SOC with the heating starting battery residual capacity limit value;
when the comparison result of the battery management module BMS indicates that the current battery residual capacity SOC is less than or equal to the heating starting battery residual capacity limit value, the battery management module BMS controls the battery heating system not to be started again until the battery management module BMS detects that the vehicle-mounted battery has a charging action and restarts the electric vehicle, and the battery management module BMS compares the current battery residual capacity SOC with the heating starting battery residual capacity limit value again;
when the comparison result of the battery management module BMS indicates that the current battery residual capacity SOC is larger than the heating starting battery residual capacity limit value, entering the next step;
step four, the battery management module BMS compares the current temperature with the heating direct start temperature limit value;
when the comparison result of the battery management module BMS indicates that the current temperature is less than or equal to the heating direct starting temperature limit value, the battery management module BMS controls the battery heating system to start, otherwise, the next step is carried out;
step five, the battery management module BMS compares the current temperature with the heating inquiry starting temperature range, and enters the next step when the lower limit value of the heating inquiry starting temperature range is less than the current temperature and less than or equal to the upper limit value of the heating inquiry starting temperature range, or enters the step seven;
step six, the battery management module BMS controls to send out inquiry information, wherein the inquiry information is whether the driver plans to accumulate the running time to exceed a time period T2 in a subsequent time period T1, and the battery management module BMS controls the starting of the battery heating system after receiving affirmative information; after receiving the negative information, the battery management module BMS controls the battery heating system not to be started;
and seventhly, controlling the battery heating system to be not started by the battery management module BMS.
As a preferable technical scheme, the limit value of the residual capacity of the heating starting battery is 30% of the rated capacity of the vehicle-mounted battery, the limit value of the heating direct starting temperature is set to-20 ℃, and the range of the heating inquiry starting temperature is-20 ℃ to-10 ℃.
As a preferred technical scheme, the time period T1 is 2 hours, and the time period T2 is 1 hour.
As a preferred technical solution, the battery management module BMS sends the inquiry information through a vehicle voice assistant installed in the electric vehicle.
As a preferred technical solution, the battery management module BMS may also send the inquiry information to a mobile intelligent terminal of a driver through a wireless communication module.
As a preferred technical solution, the wireless communication module includes a wireless communication interface based on GPRS, EDGE, WLAN, Wi-Fi, 3G and 4G technologies; the mobile intelligent terminal comprises a mobile phone, a remote controller or/and a portable computer.
As an improvement to the above technical solution, after the electric vehicle turns off the key, the battery management module BMS stores the remaining capacity of the parking battery when the key is turned off;
and the mobile intelligent terminal can send control information to the battery management module BMS at any time, and the battery management module BMS automatically enters the control of the third step to the seventh step after receiving the control information, so that the preheating control of the vehicle-mounted battery is realized.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the residual capacity limit value of the heating starting battery is used as a master control condition for starting the heating function, namely when the residual capacity of the vehicle-mounted battery is smaller than or equal to the residual capacity limit value of the heating starting battery, the heating function cannot be started no matter how low the external temperature is, and the vehicle-mounted battery is prevented from being consumed too fast; when the residual capacity of the vehicle-mounted battery is greater than the residual capacity limit value of the heating starting battery, the heating starting inquiry function is started according to the external temperature condition, the phenomenon that when the vehicle runs in a short distance, the vehicle can run to a destination without using the heating function is avoided, but the heating function is automatically started to cause electric energy loss is avoided, the heating waste of a short stroke when the vehicle-mounted battery is heated is avoided, the heating controllability of the vehicle-mounted battery is improved, the continuous driving range of the electric vehicle in winter is effectively increased, meanwhile, unnecessary repeated heating of the battery is avoided, the service life of the vehicle-mounted battery is favorably ensured, the vehicle-mounted battery heating control device is suitable for vehicle-mounted battery heating control of electric vehicles of various models, and the market competitiveness of the electric vehicles is improved.
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The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
fig. 1 is a control flow diagram of an embodiment of the present invention.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, a method for controlling heating of a vehicle-mounted battery for an electric vehicle is performed in cooperation with a battery management module BMS of the electric vehicle and a battery heating system, which are well known to those skilled in the art of electric vehicles and will not be described in detail herein. The control method of the embodiment comprises the following steps:
step one, presetting a heating starting battery residual capacity limit value, a heating direct starting temperature limit value and a heating inquiry starting temperature range for controlling the heating starting of the battery in the battery management module BMS. In this embodiment, the limit value of the residual capacity of the heating start battery is 30% of the rated capacity of the on-vehicle battery, the limit value of the heating direct start temperature is set to-20 ℃, the range of the heating inquiry start temperature is-20 ℃ to-10 ℃, and the battery management module BMS can modify the appropriate limit value of the heating direct start temperature and the range of the heating inquiry start temperature to improve the flexibility of the control method according to different usage areas of the electric vehicle and different temperature differences of each area.
And step two, after the electric automobile opens the key, the battery management module BMS acquires the current temperature T and the current battery residual capacity SOC of the vehicle-mounted battery. The current temperature T can be obtained according to a temperature sensor arranged on the electric automobile, and the current battery residual capacity SOC is automatically obtained through the cooperation of the battery management module BMS and the vehicle-mounted battery.
And step three, the battery management module BMS compares the current battery residual capacity SOC with the heating starting battery residual capacity limit value, and selects a corresponding control strategy according to the comparison result.
Specifically, when the comparison result of the battery management module BMS indicates that the current battery remaining capacity SOC is less than or equal to the heating start battery remaining capacity limit value (that is, the current battery remaining capacity SOC is less than or equal to 30% of the rated capacity of the vehicle-mounted battery), the battery management module BMS controls the battery heating system to stop starting no longer no matter how low the outside temperature is, until the battery management module BMS detects that the vehicle-mounted battery has a charging action and starts the electric vehicle again, the battery management module BMS compares the current battery remaining capacity SOC with the heating start battery remaining capacity limit value again, and if the comparison result does not yet, the battery heating system continues to be stopped, and the detection control is performed cyclically according to the method until the comparison result changes; and when the comparison result of the battery management module BMS indicates that the current battery residual capacity SOC is larger than the heating starting battery residual capacity limit value (namely, the current battery residual capacity SOC is larger than 30% of the rated capacity of the vehicle-mounted battery), the next step is carried out. Therefore, the heating starting battery residual capacity limit value is a first-layer switch for determining whether the battery heating system is started or not, the judgment is continued according to other conditions only when the set conditions are met, a corresponding control strategy is selected, and further control is not needed when the conditions are not met.
And step four, comparing the current temperature T with the heating direct start temperature limit value by the battery management module BMS, and obtaining different control strategies according to the comparison result of the current temperature T and the heating direct start temperature limit value.
And when the comparison result of the battery management module BMS indicates that the current temperature T is less than or equal to the heating direct starting temperature limit value (namely the current temperature T is less than or equal to minus 20 ℃), the battery management module BMS controls the battery heating system to start, otherwise, the next step is carried out. And (3) combining the above conditions, namely when the current battery residual capacity SOC is more than 30% of the rated capacity of the vehicle-mounted battery and the current temperature T is less than or equal to minus 20 ℃, the battery management module BMS controls the battery heating system to start, otherwise, the next step is carried out.
And step five, the battery management module BMS compares the current temperature T with the heating inquiry starting temperature range, and enters the next step when the lower limit value of the heating inquiry starting temperature range is less than the current temperature T and is less than or equal to the upper limit value of the heating inquiry starting temperature range (namely minus 20 ℃ and less than or equal to minus 10 ℃), otherwise, enters the step seven.
Sixthly, the battery management module BMS controls to send out inquiry information, wherein the inquiry information is whether the accumulated running time scheduled by the driver exceeds a time period T2 in a subsequent time period T1, and the battery management module BMS controls the battery heating system to start after receiving affirmative information; and after receiving the negative information, the battery management module BMS controls the battery heating system not to be started. If the time period T1 is 2 hours and the time period T2 is 1 hour, that is, the query information indicates whether the driver plans the accumulated travel time to exceed the time period 1 hour within the subsequent time period 2 hours, the battery management module BMS controls the activation of the battery heating system after receiving the affirmative information; and after receiving the negative information, the battery management module BMS controls the battery heating system not to be started. The two time periods are set values, and are used for being flexibly adjusted through the battery management module BMS according to actual use conditions. When the driver considers the problem that whether the planned accumulated running time exceeds 1 hour, the condition of stopping the vehicle in the middle can be taken into consideration, and in addition, if the plan is just about 1 hour, when the user can not accurately judge, the situation is irrelevant, the driving heating only optimizes and improves the vehicle using experience, and the vehicle function is not influenced or the damage of parts is not caused.
In this embodiment, the battery management module BMS sends the inquiry information through a vehicle voice assistant installed in the electric vehicle, that is, the inquiry information is a voice prompt, and is suitable for a driver to hear the information when the driver is in the vehicle, and then the driver can select the information according to actual needs through a selection button or button connected to the battery management module BMS in the cab, that is, send a positive or negative information to the battery management module BMS.
And seventhly, controlling the battery heating system to be not started by the battery management module BMS. The control process is particularly suitable for controlling the vehicle in the running process.
When the vehicle is in a remote stop state, the following technical means can be selected to realize remote control. Namely, the battery management module BMS may also send the inquiry information to the mobile intelligent terminal of the driver through the wireless communication module. The wireless communication module comprises a wireless communication interface based on GPRS, EDGE, WLAN, Wi-Fi, 3G and 4G technologies; the mobile intelligent terminal comprises a mobile phone, a remote controller or/and a portable computer. And sending a remote control signal to the battery management module BMS through the mobile intelligent terminal and the wireless communication module, wherein the battery management module BMS is provided with an independent power supply for controlling and using in the parking process.
The specific control method comprises the following steps: and after the electric automobile is turned off, the battery management module BMS stores the residual capacity of the parking battery when the key is turned off, and the residual capacity of the parking battery is used for being compared with the limit value of the residual capacity of the heating starting battery after receiving a remote control signal. And the mobile intelligent terminal can send control information to the battery management module BMS at any time, and the battery management module BMS automatically enters the control of the third step to the seventh step after receiving the control information, so that the preheating control of the vehicle-mounted battery is realized. When the driver has a trip plan, the battery management module BMS sends information to the battery heating system in advance, the battery management module BMS can judge whether to start the battery heating system according to actual conditions, and when the heating conditions are met, the battery heating system is started in advance to heat the battery, so that the preheating purpose is achieved, and the cruising mileage of the vehicle is guaranteed.
According to the invention, the residual capacity limit value of the heating starting battery is used as a master control condition for starting the heating function, namely when the residual capacity of the vehicle-mounted battery is less than or equal to the residual capacity limit value of the heating starting battery, the heating function can not be started no matter how low the external temperature is, so that the vehicle-mounted battery is prevented from being consumed too fast; when the residual capacity of the vehicle-mounted battery is greater than the residual capacity limit value of the heating starting battery, the heating starting inquiry function is started according to the external temperature condition, the phenomenon that when the vehicle runs in a short distance, the vehicle can run to a destination without using the heating function is avoided, but the heating function is automatically started to cause electric energy loss is avoided, the heating waste of a short stroke when the vehicle-mounted battery is heated is avoided, the heating controllability of the vehicle-mounted battery is improved, the continuous driving range of the electric vehicle in winter is effectively increased, meanwhile, unnecessary repeated heating of the battery is avoided, the service life of the vehicle-mounted battery is favorably ensured, the vehicle-mounted battery heating control device is suitable for vehicle-mounted battery heating control of electric vehicles of various models, and the market competitiveness of the electric vehicles is improved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a vehicle-mounted battery heating control method for electric automobile, accomplishes under the cooperation of electric automobile battery management module BMS and battery heating system, its characterized in that: comprises the following steps of (a) carrying out,
step one, presetting a heating starting battery residual capacity limit value, a heating direct starting temperature limit value and a heating inquiry starting temperature range for controlling the heating starting of the battery in the battery management module BMS;
step two, after the electric automobile opens the key, the battery management module BMS acquires the current temperature of the vehicle-mounted battery and the current battery residual capacity SOC;
step three, the battery management module BMS compares the current battery residual capacity SOC with the heating starting battery residual capacity limit value;
when the comparison result of the battery management module BMS indicates that the current battery residual capacity SOC is less than or equal to the heating starting battery residual capacity limit value, the battery management module BMS controls the battery heating system not to be started again until the battery management module BMS detects that the vehicle-mounted battery has a charging action and restarts the electric vehicle, and the battery management module BMS compares the current battery residual capacity SOC with the heating starting battery residual capacity limit value again;
when the comparison result of the battery management module BMS indicates that the current battery residual capacity SOC is larger than the heating starting battery residual capacity limit value, entering the next step;
step four, the battery management module BMS compares the current temperature with the heating direct start temperature limit value;
when the comparison result of the battery management module BMS indicates that the current temperature is less than or equal to the heating direct starting temperature limit value, the battery management module BMS controls the battery heating system to start, otherwise, the next step is carried out;
step five, the battery management module BMS compares the current temperature with the heating inquiry starting temperature range, and enters the next step when the lower limit value of the heating inquiry starting temperature range is less than the current temperature and less than or equal to the upper limit value of the heating inquiry starting temperature range, or enters the step seven;
sixthly, the battery management module BMS controls to send out inquiry information, wherein the inquiry information is whether the accumulated running time scheduled by the driver exceeds a time period T2 in a subsequent time period T1, and the battery management module BMS controls the battery heating system to start after receiving affirmative information; after receiving the negative information, the battery management module BMS controls the battery heating system not to be started;
and seventhly, controlling the battery heating system to be not started by the battery management module BMS.
2. The on-vehicle battery heating control method for the electric vehicle according to claim 1, characterized in that: the residual capacity limit value of the heating starting battery is 30% of the rated capacity of the vehicle-mounted battery, the heating direct starting temperature limit value is set to be-20 ℃, and the heating inquiry starting temperature range is-20 ℃ to-10 ℃.
3. The on-vehicle battery heating control method for the electric vehicle according to claim 1, characterized in that: the time period T1 is 2 hours and the time period T2 is 1 hour.
4. The on-vehicle battery heating control method for the electric vehicle according to claim 1, characterized in that: the battery management module BMS issues the inquiry information through a vehicle voice assistant installed in the electric vehicle.
5. The on-vehicle battery heating control method for the electric vehicle according to claim 4, characterized in that: the battery management module BMS may also send the inquiry information to the mobile intelligent terminal of the driver through the wireless communication module.
6. The on-vehicle battery heating control method for the electric vehicle according to claim 5, characterized in that: the wireless communication module comprises a wireless communication interface based on GPRS, EDGE, WLAN, Wi-Fi, 3G and 4G technologies; the mobile intelligent terminal comprises a mobile phone, a remote controller or/and a portable computer.
7. The on-vehicle battery heating control method for the electric vehicle according to claim 5 or 6, characterized in that: after the electric automobile is turned off, the battery management module BMS stores the remaining capacity of the parking battery when the key is turned off;
and the mobile intelligent terminal can send control information to the battery management module BMS at any time, and the battery management module BMS automatically enters the control of the third step to the seventh step after receiving the control information, so that the preheating control of the vehicle-mounted battery is realized.
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| CN111762064B (en) * | 2020-05-26 | 2021-07-20 | 博雷顿科技有限公司 | Remote preheating method for battery of pure electric vehicle |
| CN112109593A (en) * | 2020-09-02 | 2020-12-22 | 长城汽车股份有限公司 | Method and device for controlling battery heating and vehicle |
| CN112271359B (en) * | 2020-11-13 | 2022-03-01 | 睿驰电装(大连)电动系统有限公司 | Heating system control method and device based on battery and electronic equipment |
| CN114655080B (en) * | 2022-03-31 | 2023-05-23 | 重庆长安新能源汽车科技有限公司 | Battery heating control method and control system in running process of electric vehicle |
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| CN111048871A (en) | 2020-04-21 |
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