CN117755155A - Method, device, equipment and medium for thermal management of vehicle battery - Google Patents
Method, device, equipment and medium for thermal management of vehicle battery Download PDFInfo
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- CN117755155A CN117755155A CN202311852829.XA CN202311852829A CN117755155A CN 117755155 A CN117755155 A CN 117755155A CN 202311852829 A CN202311852829 A CN 202311852829A CN 117755155 A CN117755155 A CN 117755155A
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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
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses a thermal management method, a device, equipment and a medium for a vehicle battery, and belongs to the technical field of vehicles. The method comprises the following steps: acquiring the current first temperature of a battery, and the driving working condition and driving mode of a vehicle, wherein the driving working condition comprises a short-distance working condition and a non-short-distance working condition, and the driving mode comprises a fierce driving mode and a non-fierce driving mode; and judging whether to adjust the temperature of the battery according to the first temperature, the driving working condition and the driving mode. The method can consider the running condition and the driving mode of the vehicle, and judge whether to adjust the temperature of the battery based on the current temperature of the battery, so that the battery can be more accurately subjected to heat management, the performance of the vehicle is ensured, and the energy consumed by heat management is saved.
Description
Technical Field
The present invention relates to the field of vehicle technologies, and in particular, to a method, an apparatus, a device, and a medium for thermal management of a vehicle battery.
Background
The temperature of the battery directly affects the power performance of the vehicle and the service life of the battery, and it is necessary to adjust the temperature of the battery when the battery is in a low-temperature or high-temperature environment during running of the vehicle so as to achieve optimal performance of the vehicle and to protect the battery.
In the prior art, a threshold value of battery thermal management is determined according to an optimal temperature range in battery factory parameters, and when the actual temperature of the battery reaches the threshold value during running of a vehicle, temperature adjustment is performed. However, the method does not consider the running condition of the vehicle, so that the temperature adjustment is not accurate enough, and the energy consumption is wasted.
Disclosure of Invention
In view of the above problems, the present invention provides a method, an apparatus, a device, and a medium for thermal management of a vehicle battery, which can consider a driving condition and a driving mode of a vehicle, and determine whether to adjust the temperature of the battery based on the current temperature of the battery, so as to more accurately perform thermal management on the battery, ensure the performance of the vehicle, and save the electric energy consumed by thermal management.
In a first aspect, the present invention provides a method of thermal management of a vehicle battery, the method comprising:
acquiring the current first temperature of a battery, and the driving working condition and driving mode of a vehicle, wherein the driving working condition comprises a short-distance working condition and a non-short-distance working condition, and the driving mode comprises a fierce driving mode and a non-fierce driving mode;
and judging whether to adjust the temperature of the battery according to the first temperature, the driving working condition and the driving mode.
Optionally, the determining whether to adjust the temperature of the battery according to the first temperature, the driving condition and the driving mode includes:
the remaining power of the battery is obtained,
if the driving condition is the non-short-distance condition, the residual electric quantity is larger than an electric quantity threshold value, and the first temperature is smaller than a first temperature threshold value, the temperature of the battery is increased;
if the driving condition is the short-distance condition, the residual electric quantity is larger than the electric quantity threshold, the driving mode is the fierce driving mode, and the first temperature is smaller than the first temperature threshold, the temperature of the battery is increased;
if the driving condition is the short-distance condition, the residual electric quantity is larger than the electric quantity threshold, the driving mode is the non-violent driving mode, and the first temperature is smaller than the first temperature threshold, the temperature of the battery is not adjusted;
and if the residual electric quantity is smaller than or equal to the electric quantity threshold value or the first temperature is larger than or equal to the first temperature threshold value, not increasing the temperature of the battery.
Optionally, the determining whether to adjust the temperature of the battery according to the actual temperature, the driving condition and the driving mode further includes:
If the driving condition is the short-distance condition, the driving mode is the fierce driving mode, and the first temperature is greater than a second temperature threshold, the temperature of the battery is reduced;
if the driving condition is the short-distance condition, the driving mode is the non-violent driving mode, and the first temperature is greater than a third temperature threshold, the temperature of the battery is reduced;
wherein the third temperature threshold is greater than the second temperature threshold.
Optionally, the determining whether to adjust the temperature of the battery according to the actual temperature, the driving condition and the driving mode further includes:
if the driving condition is the non-short distance condition, acquiring a driving route of the vehicle, wherein the driving route comprises a common route and a common route;
if the driving condition is the non-short distance condition, the driving route is the unusual route, and the first temperature is greater than a second temperature threshold, the temperature of the battery is reduced;
if the driving condition is the non-short distance condition and the driving route is the common route, predicting a second temperature of the battery when the vehicle reaches a destination according to the first temperature; and judging whether to reduce the temperature of the battery according to the second temperature and the driving mode.
Optionally, the determining whether to reduce the temperature of the battery according to the second temperature and the driving mode includes:
if the second temperature is less than a fourth temperature threshold, not reducing the temperature of the battery;
if the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is the non-violent driving mode, determining a fifth temperature threshold according to a difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the fifth temperature threshold;
if the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is the aggressive driving mode, determining a sixth temperature threshold according to a difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the sixth temperature threshold;
wherein the sixth temperature threshold is less than the fifth temperature threshold, which is less than the fourth temperature threshold.
Optionally, before the acquiring the driving condition of the vehicle, the method further includes:
acquiring historical travel data of the vehicle, wherein the historical travel data comprises a travel distance, a travel starting time, a travel average speed and a battery average discharge power;
And determining the driving working condition of the vehicle according to the travel distance, the travel starting time, the travel average vehicle speed and the battery average discharge power.
Optionally, before the acquiring the driving mode of the vehicle, the method further includes:
acquiring the times that the depth of an accelerator pedal is larger than a depth threshold value and the accumulated time that the discharge power of the battery is larger than a power threshold value;
if the number of times is greater than a number threshold or the accumulated time is greater than a time threshold, determining that the driving mode is the fierce driving mode;
and if the number of times is not greater than the number of times threshold and the maximum discharge power is not greater than the power threshold, determining that the driving mode is the non-violent driving mode.
In a second aspect, the present invention provides a thermal management device for a vehicle battery, the device comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current first temperature of a battery, and the driving working conditions and driving modes of a vehicle, wherein the driving working conditions comprise short-distance working conditions and non-short-distance working conditions, and the driving modes comprise a fierce driving mode and a non-fierce driving mode;
and the judging module is used for judging whether to adjust the temperature of the battery according to the first temperature, the driving working condition and the driving mode.
Optionally, the judging module includes a heating unit for:
the remaining power of the battery is obtained,
if the driving condition is the non-short-distance condition, the residual electric quantity is larger than an electric quantity threshold value, and the first temperature is smaller than a first temperature threshold value, the temperature of the battery is increased;
if the driving condition is the short-distance condition, the residual electric quantity is larger than the electric quantity threshold, the driving mode is the fierce driving mode, and the first temperature is smaller than the first temperature threshold, the temperature of the battery is increased;
if the driving condition is the short-distance condition, the residual electric quantity is larger than the electric quantity threshold, the driving mode is the non-violent driving mode, and the first temperature is smaller than the first temperature threshold, the temperature of the battery is not adjusted;
and if the residual electric quantity is smaller than or equal to the electric quantity threshold value or the first temperature is larger than or equal to the first temperature threshold value, not increasing the temperature of the battery.
Optionally, the judging module further includes a first refrigeration unit, configured to:
if the driving condition is the short-distance condition, the driving mode is the fierce driving mode, and the first temperature is greater than a second temperature threshold, the temperature of the battery is reduced;
If the driving condition is the short-distance condition, the driving mode is the non-violent driving mode, and the first temperature is greater than a third temperature threshold, the temperature of the battery is reduced;
wherein the third temperature threshold is greater than the second temperature threshold.
Optionally, the judging module further includes:
the acquisition unit is used for acquiring a driving route of the vehicle if the driving condition is the non-short-distance condition, wherein the driving route comprises a common route and a common route;
the second refrigeration unit is used for reducing the temperature of the battery if the driving condition is the non-short-distance condition, the driving route is the unusual route and the first temperature is greater than a second temperature threshold;
the third refrigeration unit is used for predicting the second temperature of the battery when the vehicle reaches a destination according to the first temperature if the driving condition is the non-short-distance condition and the driving route is the common route; and judging whether to reduce the temperature of the battery according to the second temperature and the driving mode.
Optionally, the third refrigeration unit is further configured to:
if the second temperature is less than a fourth temperature threshold, not reducing the temperature of the battery;
If the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is the non-violent driving mode, determining a fifth temperature threshold according to a difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the fifth temperature threshold;
if the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is the aggressive driving mode, determining a sixth temperature threshold according to a difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the sixth temperature threshold;
wherein the sixth temperature threshold is less than the fifth temperature threshold, which is less than the fourth temperature threshold.
Optionally, the apparatus further includes a first determining module configured to:
acquiring historical travel data of the vehicle, wherein the historical travel data comprises a travel distance, a travel starting time, a travel average speed and a battery average discharge power;
and determining the driving working condition of the vehicle according to the travel distance, the travel starting time, the travel average vehicle speed and the battery average discharge power.
Optionally, the apparatus further includes a second determining module configured to:
acquiring the times that the depth of an accelerator pedal is larger than a depth threshold value and the accumulated time that the discharge power of the battery is larger than a power threshold value;
if the number of times is greater than a number threshold or the accumulated time is greater than a time threshold, determining that the driving mode is the fierce driving mode;
and if the number of times is not greater than the number of times threshold and the maximum discharge power is not greater than the power threshold, determining that the driving mode is the non-violent driving mode.
In a third aspect, the present invention provides an electronic device, comprising: a memory and a processor, the memory and the processor being communicatively coupled to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method according to the first aspect.
In a fourth aspect, the present invention provides a computer readable storage medium storing computer instructions for causing a computer to perform the method of the first aspect.
The technical scheme provided by the embodiment of the invention has at least the following technical effects or advantages:
The thermal management method, the device, the equipment and the medium for the vehicle battery provided by the embodiment of the invention can firstly acquire the current first temperature of the battery, the running working condition of the vehicle and the driving mode, wherein the running working condition comprises a short-distance working condition and a non-short-distance working condition, the driving mode comprises a fierce driving mode and a non-fierce driving mode, the distance of a destination is estimated through the running working condition, and the requirement of a driver on the dynamic property is known through the driving mode; and judging whether to adjust the temperature of the battery according to the first temperature, the driving working condition and the driving mode, so as to realize the thermal management of the battery. The method can consider the running condition and the driving mode of the vehicle, more accurately perform thermal management on the battery, ensure the performance of the vehicle and save the energy consumed by thermal management.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a flow chart of a method of thermal management of a vehicle battery provided in an embodiment of the present invention;
fig. 2 is a block diagram of a thermal management device for a vehicle battery according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for thermal management of a vehicle battery according to an embodiment of the present invention, as shown in fig. 1, the method includes:
step S110, the current first temperature of the battery, the running condition of the vehicle and the driving mode are obtained.
The driving modes comprise a fierce driving mode and a non-fierce driving mode.
In this embodiment, when the battery is thermally managed, not only the current temperature condition of the battery but also the running condition and driving mode of the vehicle are considered. The driving working condition can estimate the distance of the destination, and the driving mode can reflect the requirement of the driver on the dynamic property.
Optionally, before step S110, the method further includes:
acquiring historical travel data of a vehicle, wherein the historical travel data comprises travel distance, travel starting time, travel average speed and battery average discharge power; and determining the running working condition of the vehicle according to the travel distance, the travel starting time, the travel average vehicle speed and the battery average discharge power.
It can be understood that when the vehicle is powered down after each trip, the data of the current trip is recorded in the history trip data, namely, the trip distance, the trip starting time, the running average speed and the battery charge and discharge power of the run are recorded.
In this embodiment, determining the driving condition of the vehicle according to the trip distance, the trip start time, the trip average vehicle speed and the battery average discharge power includes:
and if the travel distance is smaller than the distance threshold, the travel average speed is smaller than the speed threshold, the average discharge power of the battery is smaller than the first power threshold, and the travel starting time is within a set time period, the first accumulated number of times of one short travel is increased.
It can be understood that if the distance, the average vehicle speed and the average discharge power of the battery of the journey are all smaller than the set threshold value when the vehicle is powered down, and the starting time of the journey is within the set time period, the use condition of the vehicle of the user is judged to be short distance running, at this time, the first accumulated number of times of short distance running of the vehicle is +1, and the first accumulated number of times of short distance running is recorded in the memory.
And step two, if the travel distance is not smaller than the distance threshold, the travel average vehicle speed is not smaller than the vehicle speed threshold, the average discharge power of the battery is not smaller than the first power threshold, or the travel starting time is not in the set time period, the second accumulated number of non-short travel is increased.
It can be understood that if the distance, the average vehicle speed or the average discharge power of the battery of the journey is greater than or equal to the set threshold value when the vehicle is powered down, or the starting time of the journey is not within the set time period, the use condition of the vehicle of the user is judged to be non-short distance running, at this time, the second accumulated number of times of non-short distance running of the vehicle is +1, and the second accumulated number of times of non-short distance running is recorded in the memory.
And thirdly, if the first accumulated times are larger than the second times threshold, defaulting the driving working condition of the next journey of the vehicle to be a short-distance working condition, and clearing the first accumulated times and the second accumulated times after the next journey starts.
It can be understood that if the first accumulated number of times of short-distance running is greater than the second threshold, judging that the running condition of the next journey of the vehicle of the user is a short-distance condition; and at the beginning of the next trip, clearing the first accumulated times of short-distance running and the second accumulated times of non-short-distance running, namely, recounting from the beginning of the next trip.
The second time threshold may be determined according to practical situations, for example, the second time threshold is 2.
And fourthly, if the second accumulated times are larger than the second times threshold, defaulting the running condition of the next journey of the vehicle to a non-short-distance condition, and clearing the first accumulated times and the second accumulated times after the next journey starts.
It can be understood that if the second accumulated number of times of non-short-distance running is greater than the second number threshold, judging that the running condition of the next journey of the vehicle of the user is a non-short-distance condition; and at the beginning of the next trip, clearing the first accumulated times of short-distance running and the second accumulated times of non-short-distance running, namely, recounting from the beginning of the next trip.
And fifthly, if the first accumulated times are not greater than the second times threshold or the second accumulated times are not greater than the second times threshold, defaulting the running condition of the next journey of the vehicle to the running condition of the last journey.
In this embodiment, if the vehicle starts the navigation function, navigation information is acquired, that is, the time, mileage and road condition required for navigating to the destination are acquired; if the time is smaller than the second time threshold value and the mileage is smaller than the mileage threshold value, and the running road is a non-expressway and a non-mountain road, updating the running condition of the vehicle to be a short-distance condition; if the time is not less than the second time threshold or the mileage is not less than the mileage threshold, or the running road has a highway or a mountain road, the running condition of the vehicle is updated to be a non-short-distance condition. The running condition judged by navigation is only used for the current running, does not participate in the calculation of the accumulated times of the short-distance running or the non-short-distance running of the vehicle, and does not record the current travel data into a memory of the historical travel data.
In this embodiment, when the vehicle is powered on, the IVI (In-Vehicle Infotainment) is used to inquire of the driver whether the driving condition of the current journey is a short-distance condition, and if the driver selects yes, the driving condition is updated to be the short-distance condition; if the driver selects no, the driving working condition is updated to be a non-short-distance working condition; and inquiring the journey of the driving working condition of the driver through the IVI, participating in the calculation of the accumulated times of the short-distance driving or the non-short-distance driving of the vehicle, and recording the journey data into a memory of the historical journey data.
Optionally, before step S110, the method further includes:
acquiring the times that the depth of an accelerator pedal is larger than a depth threshold value and the accumulated time that the discharge power of a battery is larger than a power threshold value; if the number of times is greater than the number of times threshold or the accumulated time is greater than the time threshold, determining that the driving mode is a fierce driving mode; and if the number of times is not greater than the number threshold and the maximum discharge power is not greater than the power threshold, determining that the driving mode is a non-violent driving mode.
It is understood that if the depth of the driver's stepping on the accelerator pedal is greater than the depth threshold value (first time threshold value) or the accumulated time of the battery discharge power being greater than the power threshold value (second power threshold value) is greater than the time threshold value (first time threshold value), it indicates that the driver has a need for aggressive driving, and the driving mode is adjusted to the aggressive driving mode. If the number of times is not greater than the number of times threshold (first time threshold) and the maximum discharge power is not greater than the power threshold (second power threshold), it is indicated that the driver has no need for aggressive driving, and the driving mode is adjusted to a non-aggressive driving mode with a low need for dynamic performance.
In this embodiment, the power mode selected by the user on the IVI may also be obtained, where the power mode may include an economy mode, a comfort mode, and a sport mode, where the power performance of the vehicle in the economy mode is general, the power performance of the vehicle in the comfort mode is better, and the power performance of the vehicle in the sport mode is stronger. If the power mode is the sport mode, indicating that the driver is driving hard, determining the driving mode as the hard driving mode. If the power mode is the economy mode or the comfort mode, the driving mode is determined to be the non-aggressive driving mode.
Step S120, judging whether to adjust the temperature of the battery according to the first temperature, the driving condition and the driving mode.
It can be understood that according to the specific conditions of the first temperature, the driving working condition and the driving mode, whether the battery needs to be heated or cooled is judged, so that the performance of the battery is improved, the service life of the battery is ensured, and the dynamic property of the whole vehicle is improved.
Optionally, step S120 includes:
step S1201, the remaining power of the battery is acquired.
It is understood that since the energy consumption for heating the battery is relatively large, the remaining capacity of the battery needs to be considered in determining whether the battery needs to be heated.
Step 1202, if the driving condition is a non-short-distance condition, the remaining power is greater than the power threshold, and the first temperature is less than the first temperature threshold, increasing the temperature of the battery.
It will be appreciated that long distance travel is required and that the battery is relatively charged and that heating of the battery is required when the battery temperature is very low. Because the temperature of the battery directly influences the output power of the battery, the temperature of the battery is increased at the moment, so that the battery is prevented from being damaged, and the output power of the battery can meet the requirements of a driver.
In step S1203, if the driving condition is a short-distance condition, the remaining power is greater than the power threshold, the driving mode is a aggressive driving mode, and the first temperature is less than the first temperature threshold, the temperature of the battery is increased.
It is understood that the vehicle is traveling in a short distance and the battery is relatively charged, but the driver has a strong driving demand and needs to heat the battery when the battery temperature is very low. Preventing the output power of the battery from not meeting the driver's demand.
In step S1204, if the driving condition is a short-distance condition, the remaining power is greater than the power threshold, the driving mode is a non-aggressive driving mode, and the first temperature is less than the first temperature threshold, the temperature of the battery is not adjusted.
It is understood that the vehicle is traveling in a short distance, the battery is relatively charged, and the driver does not have a strong driving demand, and the battery is not required to be heated when the battery temperature is very low. Because the short distance traveling vehicle can reach the destination quickly, the heating can cause the vehicle to reach the destination just after the heating is finished, and the waste of the energy consumption of the heating is prevented.
In step S1205, if the remaining power is less than or equal to the power threshold or the first temperature is greater than or equal to the first temperature threshold, the temperature of the battery is not increased.
It will be appreciated that the battery has a low charge and, in order to save power, the battery cannot be heated at this time; alternatively, the temperature of the battery is not very low and the battery is not heated.
In the present embodiment, if the first temperature of the battery is heated to the stop heating threshold (seventh temperature threshold), the increase in the temperature of the battery, that is, the heating is stopped. Wherein the stop heating threshold may be determined based on a battery charge-discharge performance table and a decay characteristic of the battery.
Optionally, step S120 further includes:
if the driving condition is a short-distance condition, the driving mode is a fierce driving mode, and the first temperature is greater than the second temperature threshold, the temperature of the battery is reduced; if the driving condition is a short-distance condition, the driving mode is a non-violent driving mode, and the first temperature is greater than the third temperature threshold, the temperature of the battery is reduced.
Wherein the third temperature threshold is greater than the second temperature threshold.
It is understood that under short-range conditions, it is possible to determine whether to cool the battery directly from the driving mode and the battery temperature.
Specifically, under a short-distance working condition, if a driver has a strong driving requirement, refrigerating the battery when the first temperature reaches a second temperature threshold value so as to reduce the temperature of the battery; under the short-distance working condition, if the driver does not have a strong driving requirement, the battery is refrigerated when the first temperature reaches a third temperature threshold value, so that the temperature of the battery is reduced. The third temperature threshold value is set to be larger than the second temperature threshold value, because the heat generation amount of the battery is relatively low when no violent driving is performed, the battery can be refrigerated when the temperature of the battery is higher, so that the energy consumption is saved, the battery is prevented from being excessively fast in temperature rise caused by the violent driving, and the temperature reduction treatment is performed slightly in advance, so that the safety of the battery and the running safety of a vehicle are ensured.
Optionally, step S120 further includes:
and if the driving condition is a non-short-distance condition, acquiring a driving route of the vehicle, wherein the driving route comprises a common route and a common route.
It can be understood that under the non-short-distance working condition, the running route of the vehicle needs to be considered, and whether the battery needs to be refrigerated or not is judged according to the running route and the first temperature so as to reduce the temperature of the battery.
The common route refers to several routes that the vehicle often runs, and the common route refers to a route that the vehicle rarely runs or does not run.
In this embodiment, the route of each driving of the vehicle may be recorded, and if the number of times of driving the route is greater than the corresponding third threshold, the route is recorded as a common route, and the routes not recorded in the common route are all very common routes. The position of the vehicle can be determined, and after the vehicle starts, if the position deviates from the normal route for a while, the driving route of the vehicle is determined as the very normal route, and if the position is always on the normal route or the deviation time is small, the driving route of the vehicle is determined as the normal route. If the vehicle starts navigation, whether the route of the vehicle is a common route can be directly judged according to the navigation route.
And step two, if the driving working condition is a non-short-distance working condition, the driving route is a very-used route, and the first temperature is greater than a second temperature threshold value, and then the temperature of the battery is reduced.
It can be understood that under the non-short-distance working condition, the driving route is also a very useful route, and the driving condition of the vehicle is hardly expected, at the moment, when the first temperature is higher than the second temperature threshold, namely, a relatively smaller temperature threshold is selected, and the battery is immediately refrigerated when the battery temperature is slightly higher, so that the battery safety and the driving safety are better protected, and the battery temperature rise is too fast due to the uncertain route.
Thirdly, if the driving condition is a non-short-distance condition and the driving route is a common route, predicting a second temperature of the battery when the vehicle reaches a destination according to the first temperature; and judging whether to reduce the temperature of the battery according to the second temperature and the driving mode.
It is understood that, under the non-short distance working condition, if the driving route is a common route, it is necessary to further know the second temperature of the battery when the vehicle reaches the destination, and determine whether to cool the battery according to the second temperature and the driving mode.
Wherein, the battery temperature when the vehicle reaches the destination, namely the second temperature, can be calculated according to the temperature of the current battery, the remaining distance from the current position of the vehicle to the destination, the remaining time and the temperature rise rate of the battery without cooling the battery.
Optionally, the third step includes:
and step one, if the second temperature is smaller than the fourth temperature threshold value, the temperature of the battery is not reduced.
Wherein the fourth temperature threshold is the highest temperature threshold, if the second temperature of the battery exceeds the fourth temperature threshold, the battery temperature is too high, which is very dangerous, all possible measures must be taken to cool the battery, otherwise, the risk coefficient of passengers, the battery and the vehicle is very high, and it is difficult to determine their safety.
Therefore, under the non-short-distance working condition, if the driving route is a common route, the second temperature is smaller than the fourth temperature threshold value, and the temperature of the battery does not need to be reduced.
And step two, if the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is a non-violent driving mode, determining a fifth temperature threshold according to the difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the fifth temperature threshold.
It can be understood that, under the non-short distance working condition, the driving route is a common route, and the driving mode is a non-violent driving mode, and when the second temperature is greater than or equal to the fourth temperature threshold, the fifth temperature threshold is determined according to the difference value between the second temperature and the fourth temperature threshold. The larger the difference value is, the higher the heat generated by the battery is in the journey, the lower the fifth temperature threshold value is, and the battery is cooled as soon as possible, so that the battery is prevented from being over-heated; if the difference value is smaller, the fact that the battery heat generation amount is relatively low in the journey is indicated, the fifth temperature threshold value is higher, the battery is refrigerated later, and energy consumption is saved.
Therefore, under the non-short-distance working condition, the driving route is a common route, the driving mode is a non-violent driving mode, and if the first temperature of the battery is greater than the fifth temperature threshold, the temperature of the battery is reduced.
And step three, if the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is a fierce driving mode, determining a sixth temperature threshold according to the difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the sixth temperature threshold.
Wherein the sixth temperature threshold is less than the fifth temperature threshold, and the fifth temperature threshold is less than the fourth temperature threshold.
It can be understood that, under the non-short distance working condition, the driving route is a common route, and the driving mode is a non-violent driving mode, and when the second temperature is greater than or equal to the fourth temperature threshold, the sixth temperature threshold is determined according to the difference between the second temperature and the fourth temperature threshold. Similarly, the larger the difference, the smaller the sixth temperature threshold; the smaller the difference, the greater the sixth temperature threshold.
Therefore, under the non-short-distance working condition, the driving route is a common route, the driving mode is a fierce driving mode, and if the first temperature of the battery is greater than the sixth temperature threshold value, the temperature of the battery is reduced. At this time, the sixth temperature threshold is set to be smaller than the fifth temperature threshold, and because the fifth temperature threshold is a threshold when no heavy driving demand is present, the battery heat production is relatively low when no heavy driving demand is present, so that the temperature can be higher than the temperature for refrigeration, and the energy consumption is saved; the sixth temperature threshold is a threshold when the vehicle has a strong driving demand, and the battery heat generation is relatively high when the vehicle has a strong driving demand, so that the refrigeration can be started in advance when the temperature is slightly lower, and the battery is prevented from being overheated.
In this embodiment, because the battery generates heat under the short-distance working condition may be lower than that under the non-short-distance working condition, the second temperature threshold may be set to be greater than the fifth temperature threshold, and the battery temperature under the short-distance working condition may be higher to perform refrigeration again, so as to save energy consumption. And the fourth temperature threshold is the highest threshold, so the sixth temperature threshold < the fifth temperature threshold < the second temperature threshold < the third temperature threshold < the fourth temperature threshold.
In the present embodiment, if the first temperature of the battery is reduced to the stop cooling threshold (eighth temperature threshold), cooling of the battery is stopped, that is, the reduction of the temperature of the battery is stopped.
Based on the same inventive concept, the embodiment of the invention further provides a thermal management device for a vehicle battery, and fig. 2 is a block diagram of a thermal management device for a vehicle battery according to the embodiment of the invention, as shown in fig. 2, the device 200 includes an acquisition module 210 and a determination module 220.
The obtaining module 210 is configured to obtain a current first temperature of the battery, and a driving condition and a driving mode of the vehicle, where the driving condition includes a short-distance condition and a non-short-distance condition, and the driving mode includes a aggressive driving mode and a non-aggressive driving mode;
The judging module 220 is configured to judge whether to adjust the temperature of the battery according to the first temperature, the driving condition and the driving mode.
Optionally, the judging module 220 includes a heating unit for:
the remaining power of the battery is obtained,
if the driving working condition is a non-short-distance working condition, the residual electric quantity is larger than the electric quantity threshold value, and the first temperature is smaller than the first temperature threshold value, the temperature of the battery is increased;
if the driving condition is a short-distance condition, the residual electric quantity is larger than the electric quantity threshold value, the driving mode is a fierce driving mode, and the first temperature is smaller than the first temperature threshold value, and the temperature of the battery is increased;
if the driving condition is a short-distance condition, the residual electric quantity is larger than the electric quantity threshold value, the driving mode is a non-violent driving mode, and the first temperature is smaller than the first temperature threshold value, and the temperature of the battery is not regulated;
if the remaining power is less than or equal to the power threshold or the first temperature is greater than or equal to the first temperature threshold, the temperature of the battery is not increased.
Optionally, the judging module 220 further includes a first refrigeration unit, configured to:
if the driving condition is a short-distance condition, the driving mode is a fierce driving mode, and the first temperature is greater than the second temperature threshold, the temperature of the battery is reduced;
if the driving condition is a short-distance condition, the driving mode is a non-violent driving mode, and the first temperature is greater than a third temperature threshold, the temperature of the battery is reduced;
Wherein the third temperature threshold is greater than the second temperature threshold.
Optionally, the determining module 220 further includes:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a driving route of a vehicle if the driving condition is a non-short-distance condition, and the driving route comprises a common route and a common route;
the second refrigeration unit is used for reducing the temperature of the battery if the driving condition is a non-short-distance condition, the driving route is a very-used route and the first temperature is greater than the second temperature threshold;
the third refrigeration unit is used for predicting the second temperature of the battery when the vehicle reaches the destination according to the first temperature if the driving condition is a non-short-distance condition and the driving route is a common route; and judging whether to reduce the temperature of the battery according to the second temperature and the driving mode.
Optionally, the third refrigeration unit is further configured to:
if the second temperature is less than the fourth temperature threshold, not reducing the temperature of the battery;
if the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is a non-violent driving mode, determining a fifth temperature threshold according to the difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the fifth temperature threshold;
if the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is a fierce driving mode, determining a sixth temperature threshold according to the difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the sixth temperature threshold;
Wherein the sixth temperature threshold is less than the fifth temperature threshold, and the fifth temperature threshold is less than the fourth temperature threshold.
Optionally, the apparatus 200 further includes a first determining module configured to:
acquiring historical travel data of a vehicle, wherein the historical travel data comprises travel distance, travel starting time, travel average speed and battery average discharge power;
and determining the running working condition of the vehicle according to the travel distance, the travel starting time, the travel average vehicle speed and the battery average discharge power.
Optionally, the apparatus 200 further includes a second determining module configured to:
acquiring the times that the depth of an accelerator pedal is larger than a depth threshold value and the accumulated time that the discharge power of a battery is larger than a power threshold value;
if the number of times is greater than the number of times threshold or the accumulated time is greater than the time threshold, determining that the driving mode is a fierce driving mode;
and if the number of times is not greater than the number threshold and the maximum discharge power is not greater than the power threshold, determining that the driving mode is a non-violent driving mode.
It will be appreciated that the apparatus provided in the above embodiment is only exemplified by the division of the above functional modules, and in practical application, the above functional allocation may be performed by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules, so as to perform all or part of the functions described above.
Embodiments of the present invention also provide an electronic device that may include a processor and a memory, where the processor and the memory may be communicatively coupled to each other via a bus or other means.
The processor may be a central processing unit (Central Processing Unit, CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits implementing embodiments of the present application.
The memory may include mass storage for data or instructions. By way of example, and not limitation, the memory may comprise a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or universal serial bus (Universal Serial Bus, USB) Drive, or a combination of two or more of the foregoing. The memory may include removable or non-removable (or fixed) media, where appropriate. The memory may be internal or external to the electronic device, where appropriate. In particular embodiments, the memory may be a non-volatile solid state memory.
In one example, the Memory may be a Read Only Memory (ROM). In one example, the ROM may be mask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.
The processor reads and executes the computer program instructions stored in the memory to implement the method of thermal management of a vehicle battery of any of the above embodiments.
In one example, the electronic device may also include a communication interface and a bus. The processor, the memory and the communication interface are connected through a bus and complete communication with each other. The communication interface is mainly used for realizing communication among the modules, the devices, the units and/or the equipment in the embodiment of the application. The bus may include one or more buses, where appropriate.
In addition, in combination with the method for thermal management of a vehicle battery in the above embodiments, embodiments of the present invention may be implemented by providing a computer-readable storage medium. The computer readable storage medium has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement a method of thermal management of a vehicle battery of any of the above embodiments.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the thermal management method, the device, the equipment and the medium for the vehicle battery provided by the embodiment of the invention can firstly acquire the current first temperature of the battery, the running working condition of the vehicle and the driving mode, wherein the running working condition comprises a short-distance working condition and a non-short-distance working condition, the driving mode comprises a fierce driving mode and a non-fierce driving mode, the distance of a destination is estimated through the running working condition, and the requirement of a driver on the dynamic property is known through the driving mode; and judging whether to adjust the temperature of the battery according to the first temperature, the driving working condition and the driving mode, so as to realize the thermal management of the battery. The method can consider the running condition and the driving mode of the vehicle, more accurately perform thermal management on the battery, ensure the performance of the vehicle and save the energy consumed by thermal management.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
Claims (10)
1. A method of thermal management of a vehicle battery, the method comprising:
acquiring the current first temperature of a battery, and the driving working condition and driving mode of a vehicle, wherein the driving working condition comprises a short-distance working condition and a non-short-distance working condition, and the driving mode comprises a fierce driving mode and a non-fierce driving mode;
and judging whether to adjust the temperature of the battery according to the first temperature, the driving working condition and the driving mode.
2. The method of thermal management of a vehicle battery according to claim 1, wherein the determining whether to adjust the temperature of the battery based on the first temperature, the driving condition, and the driving mode comprises:
the remaining power of the battery is obtained,
if the driving condition is the non-short-distance condition, the residual electric quantity is larger than an electric quantity threshold value, and the first temperature is smaller than a first temperature threshold value, the temperature of the battery is increased;
if the driving condition is the short-distance condition, the residual electric quantity is larger than the electric quantity threshold, the driving mode is the fierce driving mode, and the first temperature is smaller than the first temperature threshold, the temperature of the battery is increased;
If the driving condition is the short-distance condition, the residual electric quantity is larger than the electric quantity threshold, the driving mode is the non-violent driving mode, and the first temperature is smaller than the first temperature threshold, the temperature of the battery is not adjusted;
and if the residual electric quantity is smaller than or equal to the electric quantity threshold value or the first temperature is larger than or equal to the first temperature threshold value, not increasing the temperature of the battery.
3. The method of thermal management of a vehicle battery according to claim 1, wherein the determining whether to adjust the temperature of the battery based on the actual temperature, the running condition, and the driving mode further comprises:
if the driving condition is the short-distance condition, the driving mode is the fierce driving mode, and the first temperature is greater than a second temperature threshold, the temperature of the battery is reduced;
if the driving condition is the short-distance condition, the driving mode is the non-violent driving mode, and the first temperature is greater than a third temperature threshold, the temperature of the battery is reduced;
wherein the third temperature threshold is greater than the second temperature threshold.
4. The method of thermal management of a vehicle battery according to claim 1, wherein the determining whether to adjust the temperature of the battery based on the actual temperature, the running condition, and the driving mode further comprises:
if the driving condition is the non-short distance condition, acquiring a driving route of the vehicle, wherein the driving route comprises a common route and a common route;
if the driving condition is the non-short distance condition, the driving route is the unusual route, and the first temperature is greater than a second temperature threshold, the temperature of the battery is reduced;
if the driving condition is the non-short distance condition and the driving route is the common route, predicting a second temperature of the battery when the vehicle reaches a destination according to the first temperature; and judging whether to reduce the temperature of the battery according to the second temperature and the driving mode.
5. The method of thermal management of a vehicle battery according to claim 4, wherein the determining whether to decrease the temperature of the battery according to the second temperature and the driving mode includes:
if the second temperature is less than a fourth temperature threshold, not reducing the temperature of the battery;
If the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is the non-violent driving mode, determining a fifth temperature threshold according to a difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the fifth temperature threshold;
if the second temperature is greater than or equal to the fourth temperature threshold and the driving mode is the aggressive driving mode, determining a sixth temperature threshold according to a difference value between the second temperature and the fourth temperature threshold, and reducing the temperature of the battery when the first temperature is greater than the sixth temperature threshold;
wherein the sixth temperature threshold is less than the fifth temperature threshold, which is less than the fourth temperature threshold.
6. The method of thermal management of a vehicle battery of claim 1, wherein prior to said obtaining a driving condition of the vehicle, the method further comprises:
acquiring historical travel data of the vehicle, wherein the historical travel data comprises a travel distance, a travel starting time, a travel average speed and a battery average discharge power;
And determining the driving working condition of the vehicle according to the travel distance, the travel starting time, the travel average vehicle speed and the battery average discharge power.
7. The method of thermal management of a vehicle battery of claim 1, wherein prior to said obtaining a driving pattern of the vehicle, the method further comprises:
acquiring the times that the depth of an accelerator pedal is larger than a depth threshold value and the accumulated time that the discharge power of the battery is larger than a power threshold value;
if the number of times is greater than a number threshold or the accumulated time is greater than a time threshold, determining that the driving mode is the fierce driving mode;
and if the number of times is not greater than the number of times threshold and the maximum discharge power is not greater than the power threshold, determining that the driving mode is the non-violent driving mode.
8. A thermal management device for a vehicle battery, the device comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current first temperature of a battery, and the driving working conditions and driving modes of a vehicle, wherein the driving working conditions comprise short-distance working conditions and non-short-distance working conditions, and the driving modes comprise a fierce driving mode and a non-fierce driving mode;
And the judging module is used for judging whether to adjust the temperature of the battery according to the first temperature, the driving working condition and the driving mode.
9. An electronic device, comprising: a memory and a processor in communication with each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of any of claims 1-7.
10. A computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any one of claims 1-7.
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| CN202311852829.XA CN117755155A (en) | 2023-12-28 | 2023-12-28 | Method, device, equipment and medium for thermal management of vehicle battery |
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| CN202311852829.XA CN117755155A (en) | 2023-12-28 | 2023-12-28 | Method, device, equipment and medium for thermal management of vehicle battery |
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