Electric vehicle driving range calculation method, system, storage medium and electric vehicle

Abstract

The present invention provides a method, system, storage medium and electric vehicle for calculating the driving range of an electric vehicle, the method comprising: collecting the current ambient temperature and battery pack temperature; judging whether the vehicle has a core heating function turned on; if so, calculating the first available power of the battery pack at the heating cut-off temperature; calculating the first average power consumption of the vehicle within a specified mileage before the current moment; calculating the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature; calculating the driving range at the current moment according to the first available power, the estimated power consumption and the first average power consumption; if not, calculating the second available power of the battery pack at the battery pack temperature; calculating the second average power consumption of the vehicle within the specified mileage before the current moment; calculating the driving range at the current moment according to the second available power and the second average power consumption. The present invention solves the problem of a large jump in the driving range of existing vehicles when the core heating function is turned on.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle control, and in particular to a method and system for calculating the driving range of an electric vehicle, a storage medium and an electric vehicle. Background Art

[0002] In order to help drivers predict the remaining driving range and plan their trips in advance, almost all pure electric vehicles are currently equipped with a driving range display function. The driving range calculation method currently used by pure electric vehicles is: first calculate the remaining available power of the current battery pack based on the current ambient temperature, then calculate the average power consumption of a certain number of kilometers or a certain time before the current moment, and divide the former by the latter to obtain the remaining driving range.

[0003] However, in order to obtain higher energy density, electric vehicles currently generally use ternary lithium batteries or lithium iron phosphate batteries. These two types of batteries have poor discharge capabilities when the ambient temperature is low due to the physical properties of their own materials. As a result, even under the same SOC (state of charge) conditions, the available power of the battery pack at different temperatures is different. For example, when the SOC of the battery pack is 100%, the available power at room temperature is 50kwh, while the available power at minus 20 degrees Celsius may be 40kwh, resulting in a significant decrease in the available power and performance of the battery pack when used in a low temperature environment.

[0004] To solve this problem, electric vehicles using these two types of battery materials are generally equipped with a battery cell heating function. The working principle is to use the power of the battery pack or charging pile to heat the battery pack to the required temperature through PTC heating film or water circulation heating to restore the available power and performance, so as to improve the performance and driving range of the vehicle in cold environments.

[0005] When the cell heating is turned on, the temperature of the battery pack cells at the beginning of heating is low, resulting in lower available power than the available power corresponding to the temperature after heating is completed. And because heating the battery pack requires consumption of electrical energy in the battery pack, the average power consumption of the vehicle will also be higher than when the heating function is not turned on. At this time, according to the current method of calculating the range, the range will drop significantly at the beginning after the cell heating function is turned on. As the available power corresponding to the increase in the battery pack temperature increases and no additional power consumption is required after the heating is completed, the range will gradually increase again, which will cause a large jump in the range and interfere with the driver's judgment of the range. Therefore, there is a large error in its display accuracy, resulting in a large deviation between the vehicle's displayed range and the vehicle's actual range. This may cause the driver to plan the trip incorrectly, resulting in the vehicle running out of power during driving or having too much power remaining when the trip is completed, causing many inconveniences for the use of the vehicle. Summary of the invention

[0006] Based on this, the purpose of the present invention is to provide a method, system, storage medium and electric vehicle for calculating the driving range of an electric vehicle, so as to fundamentally solve the problem of a large jump in the driving range of existing vehicles when the battery cell heating function is turned on.

[0007] According to an embodiment of the present invention, a method for calculating the driving range of an electric vehicle includes:

[0008] Collect current ambient temperature and battery pack temperature;

[0009] Determine whether the vehicle has turned on the battery heating function;

[0010] If it is determined that the vehicle has turned on the battery cell heating function, the first available power when the battery pack reaches the heating cut-off temperature in the current state is calculated;

[0011] Calculate the first average power consumption of the vehicle within a specified mileage before the current moment;

[0012] Calculating the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature;

[0013] Calculating the driving range at the current moment according to the first available power, the estimated power consumption and the first average power consumption;

[0014] If it is determined that the vehicle does not have a battery cell heating function turned on, calculating a second available power of the battery pack at the battery pack temperature;

[0015] Calculate the second average power consumption of the vehicle within the specified mileage before the current moment;

[0016] The current driving range is calculated according to the second available power and the second average power consumption.

[0017] In addition, the method for calculating the driving range of an electric vehicle according to the above embodiment of the present invention may also have the following additional technical features:

[0018] Furthermore, the step of calculating the first average power consumption of the vehicle within a specified mileage before the current moment includes:

[0019] Collect the vehicle's current real-time speed and mileage, as well as the battery pack's real-time discharge power and real-time heating power;

[0020] Calculating the target time required for the vehicle to travel a specified mileage according to the real-time vehicle speed and the mileage, wherein the specified mileage is a calibrable mileage that can be calibrated according to road conditions and display requirements;

[0021] Calculate the real-time operating power of other electrical appliances except battery pack heating according to the real-time discharge power and the real-time heating power;

[0022] Calculate the average operating power within the target time consuming period according to the target time consuming period and the real-time operating power;

[0023] A first average power consumption of the vehicle when traveling the designated mileage is calculated according to the designated mileage, the average operating power, and the target time.

[0024] Furthermore, the step of calculating the current driving range based on the first available power, the estimated power consumption and the first average power consumption includes:

[0025] Calculating an estimated available power of the battery pack after heating is completed according to the first available power and the estimated power consumption;

[0026] The current driving range is calculated based on the estimated available power after the heating is completed and the first average power consumption.

[0027] Further, the step of calculating the first available power when the battery pack reaches the heating cut-off temperature in the current state includes:

[0028] Get the current SOC of the vehicle;

[0029] According to the current SOC of the vehicle and the heating cut-off temperature, searching in a three-axis calibratable data table to determine the first available power at the heating cut-off temperature, wherein the heating cut-off temperature is a calibratable value calibrated according to the physical characteristics of the vehicle battery and the driving environment;

[0030] The three axes in the three-axis calibrable data table are battery pack temperature, SOC and available power, respectively. The three-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery pack.

[0031] Furthermore, the step of calculating the second average power consumption of the vehicle within a specified mileage before the current moment includes:

[0032] Collect the vehicle's current real-time speed and mileage, as well as the battery pack's real-time discharge power;

[0033] Calculating the target time required for the vehicle to travel a specified mileage according to the real-time vehicle speed and the mileage, wherein the specified mileage is a calibrable mileage that can be calibrated according to road conditions and display requirements;

[0034] Calculate the average discharge power within the target time according to the target time and the real-time discharge power;

[0035] A second average power consumption when the vehicle travels the designated mileage is calculated according to the designated mileage, the average discharge power, and the target elapsed time.

[0036] Further, the step of calculating the second available power of the battery pack at the battery pack temperature includes:

[0037] Get the current SOC of the vehicle;

[0038] According to the current SOC of the vehicle and the battery pack temperature, a second available power at the battery pack temperature is determined by searching in a three-axis calibratable data table;

[0039] The three axes in the three-axis calibrable data table are battery pack temperature, SOC and available power, respectively. The three-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery pack.

[0040] Furthermore, the step of calculating the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature includes:

[0041] According to the current ambient temperature, the battery pack temperature and the heating cut-off temperature, searching in a four-axis calibrable data table to determine the estimated power consumption required when the battery pack is heated to the heating cut-off temperature;

[0042] The four axes in the four-axis calibrable data table are respectively the heating cut-off temperature, the ambient temperature, the battery pack temperature, and the power consumption required for heating. The four-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery and the driving environment.

[0043] According to an embodiment of the present invention, a system for calculating the driving range of an electric vehicle includes:

[0044] Information collection module, used to collect current ambient temperature and battery pack temperature;

[0045] Function judgment module, used to judge whether the vehicle has turned on the battery heating function;

[0046] A first available power calculation module, used for calculating a first available power when the battery pack reaches a heating cut-off temperature in the current state when the function judgment module judges that the vehicle turns on the battery cell heating function;

[0047] A first average power consumption calculation module, used for calculating a first average power consumption of the vehicle within a specified mileage before the current moment when the function judgment module determines that the vehicle turns on the battery cell heating function;

[0048] An estimated power consumption calculation module, used for calculating the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature when the function judgment module judges that the vehicle turns on the battery cell heating function;

[0049] A first driving range calculation module, configured to calculate the driving range at the current moment according to the first available power, the estimated power consumption and the first average power consumption when the function determination module determines that the vehicle turns on the battery cell heating function;

[0050] A second available power calculation module, used for calculating a second available power of the battery pack at the battery pack temperature when the function determination module determines that the vehicle has not turned on the battery cell heating function;

[0051] A second average power consumption calculation module, used for calculating the second average power consumption of the vehicle within a specified mileage before the current moment when the function judgment module determines that the vehicle has not turned on the battery cell heating function;

[0052] The second driving range calculation module is used to calculate the driving range at the current moment according to the second available power and the second average power consumption when the function judgment module determines that the vehicle has not turned on the battery cell heating function.

[0053] A storage medium according to an embodiment of the present invention stores a computer program, which, when executed by a processor, implements the method for calculating the driving range of an electric vehicle as described above.

[0054] An electric vehicle according to an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for calculating the driving range of the electric vehicle as described above is implemented.

[0055] Compared with the existing technology: by estimating the power consumption of the entire heating process when the battery cell heating function is turned on, calculating the average power consumption of other electrical appliances except the battery cell heating components, and calculating the available power of the battery pack when the heating is completed in advance, the cruising range when the heating is completed can be calculated in advance, so that the current cruising range can be corrected in advance, and the problem of a large jump in the vehicle's cruising range when the battery cell heating function is turned on is avoided. When the battery cell heating function is not turned on, the current accurate cruising range is effectively calculated based on the available power calculated according to the current battery pack temperature, thereby making the cruising range display more accurate and improving the convenience of vehicle use. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 is a flow chart of a method for calculating the driving range of an electric vehicle in a first embodiment of the present invention;

[0057] Figure 2 is a schematic structural diagram of a system for calculating the driving range of an electric vehicle in a second embodiment of the present invention;

[0058] Figure 3 is a schematic structural diagram of an electric vehicle in a third embodiment of the present invention;

[0059] The following specific implementations will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0060] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0061] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0063] Embodiment 1

[0064] See also Figure 1 , which shows a method for calculating the driving range of an electric vehicle in a first embodiment of the present invention, and the method specifically includes steps S01 to S09.

[0065] Step S01, collecting the current ambient temperature and battery pack temperature.

[0066] Among them, in one embodiment of the present invention, a variety of sensors are arranged on the electric vehicle to collect and detect the vehicle's status information and external environment information. For example, the vehicle is arranged with multiple sets of ambient temperature sensors for collecting the current ambient temperature T1 of the vehicle's current exterior; the battery pack in the vehicle is arranged with multiple sets of battery cell temperature sensors for collecting the battery pack temperature T2; the BMS battery management system set in the battery pack is used to collect and calculate the vehicle's current SOC; the battery pack is arranged with a BMS discharge current and voltage sensor for collecting and calculating the real-time discharge power P of the battery pack; the battery pack is arranged with a battery pack heating current and voltage sensor for collecting and calculating the real-time heating power P of the battery pack. W The vehicle is equipped with a speed sensor to collect the current real-time speed and mileage of the vehicle. It should be noted that both the ambient temperature sensor and the battery cell temperature sensor can be set in multiple groups, which are dispersedly arranged around the vehicle body and the battery pack, so that the current external ambient temperature T1 and the battery pack temperature T2 in the battery pack can be calculated more evenly and accurately, avoiding the problem of inaccurate temperature detected by a single temperature sensor due to local thermal imbalance during vehicle driving.

[0067] Step S02, determining whether the vehicle has activated the battery cell heating function.

[0068] When it is determined that the vehicle turns on the battery cell heating function, step S03 to step S06 are executed; otherwise, step S07 to step S09 are executed.

[0069] Among them, in one embodiment of the present invention, before the step of determining whether the vehicle turns on the battery cell heating function, the method further includes: obtaining the current state of the vehicle and determining whether the vehicle enters a waiting state;

[0070] If it is determined that the vehicle enters the waiting state, then continue to determine whether the vehicle turns on the battery cell heating function. If the vehicle does not enter the waiting state, then end.

[0071] Among them, when the vehicle has not entered the waiting state, it indicates that the vehicle has not been started, so there is no need to calculate and display the cruising range, and the process ends directly without executing subsequent steps; when the vehicle is in the waiting state, regardless of whether the vehicle is moving, the cruising range must be calculated and displayed so that the driver can clearly know the mileage that the vehicle can continue to travel in the current state.

[0072] Furthermore, the vehicle may have certain settings for whether to turn on the battery cell heating function. When the vehicle enters the standby state, it obtains the battery pack temperature and the current SOC of the battery pack according to various sensors, and determines whether to automatically turn on the battery cell heating function according to the corresponding combination of the obtained battery pack temperature and current SOC. For example, when the current SOC of the battery pack is higher than the preset SOC value and the battery pack temperature is lower than the preset temperature (for example, minus A degrees), the vehicle can automatically turn on the battery cell heating function to improve the performance and driving range of the vehicle in cold environments.

[0073] Step S03, calculating the first available power when the battery pack reaches the heating cut-off temperature in the current state.

[0074] Among them, in one embodiment of the present invention, when it is determined that the vehicle turns on the battery cell heating function, the first available power when the battery pack reaches the heating cut-off temperature in the current state is calculated, which can be specifically implemented by the following steps:

[0075] Get the current SOC of the vehicle;

[0076] According to the current SOC and heating cut-off temperature of the vehicle, the first available power at the heating cut-off temperature is determined by searching in the three-axis calibrable data table, where the heating cut-off temperature is a calibrable value calibrated according to the physical characteristics of the vehicle battery and the driving environment;

[0077] Among them, the three axes in the three-axis calibrable data table are battery pack temperature, SOC and available power, and the three-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery pack.

[0078] Specifically, as mentioned above, the BMS battery management system can obtain and calculate the current SOC of the vehicle. It should be pointed out at this time that there is a one-to-one mapping table between the battery pack temperature, SOC and available power, that is, its three-axis calibrable data table. At this time, according to any two values ​​of the above-mentioned battery pack temperature, SOC and available power, the other value can be obtained by looking up the table in the three-axis calibrable data table. For example, when its SOC is a constant, the battery pack temperature is different, and the corresponding available power is also different. At this time, the corresponding available power can be found according to the specific SOC and battery pack temperature.

[0079] It should be pointed out that the three-axis calibratable data table is calibrated according to the physical characteristics of the vehicle battery pack, that is, the available power of battery packs with different material components may not be the same even at the same SOC and battery pack temperature. Therefore, the vehicle first records the model of the battery pack and the three-axis calibratable data table corresponding to the model. mCalibrate according to the physical characteristics of the vehicle battery and the driving environment, that is, the heating cut-off temperature T corresponding to the battery pack with different material components and different driving environments after the heating process is completed. m For example, even in different low-temperature environments, the heating cut-off temperature T of battery A in different vehicles after heating is completed is different. m The same, but the battery A and battery B in different vehicles, even in the same low temperature environment, have a heating cut-off temperature T after the heating is completed during the heating process. m Therefore, the vehicle also records the heating cut-off temperature T corresponding to the battery pack model. m , so that the battery pack can be heated to the heating cut-off temperature T m Then stop heating.

[0080] At this time, the first available power W mentioned above needs to be obtained. 1 When the first available power W at the heating cut-off temperature is directly determined by looking up the table according to the current SOC and the heating cut-off temperature currently obtained. 1 , so that the available power of the battery pack when heating is completed can be calculated in advance according to the current SOC and the heating cut-off temperature, and the subsequent driving range calculation can be based on the available power corresponding to when the battery pack finally reaches the heating cut-off temperature in the current state, thereby avoiding the problem that the calculated driving range of existing vehicles will have a large jump due to the different available power corresponding to different battery pack temperatures after the battery cell heating function is turned on.

[0081] Step S04, calculating a first average power consumption of the vehicle within a specified mileage before the current moment.

[0082] In one embodiment of the present invention, the calculation of the first average power consumption of the vehicle within the specified mileage before the current moment may be implemented by the following steps:

[0083] Collect the vehicle's current real-time speed and mileage, as well as the battery pack's real-time discharge power and real-time heating power;

[0084] Calculate the target time required for the vehicle to travel a specified mileage based on the real-time vehicle speed and mileage, where the specified mileage is a calibrable mileage that can be calibrated based on road conditions and display requirements;

[0085] Calculate the real-time operating power of other electrical appliances except battery pack heating according to the real-time discharge power and real-time heating power;

[0086] Calculate the average operating power within the target time according to the target time and the real-time operating power;

[0087] A first average power consumption of the vehicle when traveling the specified mileage is calculated according to the specified mileage, the average operating power, and the target time.

[0088] Specifically, as mentioned above, the ambient temperature sensor collects the current ambient temperature T1, the battery cell temperature sensor in the battery pack collects the battery pack temperature T2, the BMS battery management system calculates the current SOC of the vehicle, the BMS discharge current and voltage sensors collect and calculate the real-time discharge power P, and the battery pack heating current and voltage sensors collect and calculate the real-time heating power P of the battery pack. W The vehicle speed sensor collects the current real-time vehicle speed and mileage. At this time, the target time t for the vehicle to travel the specified mileage A can be calculated through data processing. The specified mileage A is the calibrable mileage. When the value increases, the mileage display will be more stable and less prone to jumps, but the response speed will be slower. Therefore, this parameter is calibrated according to the current road conditions and display requirements.

[0089] Furthermore, the real-time operating power P of other electrical appliances excluding the real-time heating power of the battery pack is calculated based on the real-time discharge power and the real-time heating power. D :

[0090] P D =PP W ;

[0091] Furthermore, according to the target time t and the calculated real-time operating power P D Calculate the average operating power P within the target time t 1 :

[0092]

[0093] Furthermore, according to the specified mileage A, average operating power P 1 , and the target time t to calculate the first average power consumption Q of the vehicle when it travels a specified mileage 1 :

[0094]

[0095] It is understandable that in other embodiments of the present invention, it can also calculate the first average power consumption of the specified time before the current moment, for example, data processing calculates the mileage of the vehicle within the specified time, calculates the average operating power within the specified time according to the specified time and the calculated real-time operating power, and calculates the first average power consumption of the vehicle within the specified time according to the mileage, average operating power, and the specified time. At this time, by estimating the average power consumption of other electrical appliances except the battery cell heating component during the vehicle's driving process when the battery cell heating function is turned on, the energy consumption impact caused by the heating of the battery pack is eliminated.

[0096] Step S05, calculating the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature.

[0097] In one embodiment of the present invention, the estimated power consumption required for heating can be calculated based on the current ambient temperature, the battery pack temperature and the heating cut-off temperature by the following steps:

[0098] According to the current ambient temperature, battery pack temperature and heating cut-off temperature, the estimated power consumption required to heat the battery pack to the heating cut-off temperature is determined in the four-axis calibrable data table;

[0099] The four axes in the four-axis calibrable data table are heating cut-off temperature, ambient temperature, battery pack temperature, and power consumption required for heating. The four-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery and the driving environment.

[0100] Specifically, there is a one-to-one mapping table between the current ambient temperature, battery pack temperature, heating cut-off temperature, and the amount of electricity required for heating, that is, the four-axis calibratable data table. At this time, according to any three of the above current ambient temperature, battery pack temperature, heating cut-off temperature, and the amount of electricity required for heating, the other value can be obtained by looking up the table in the four-axis calibratable data table. For example, when the SOC is a constant, the battery pack temperature is different, and the corresponding available electricity is also different. It should be pointed out that the four-axis calibratable data table is calibrated according to the physical characteristics of the vehicle battery pack. At this time, the vehicle records the model of the battery pack and the four-axis calibratable data table corresponding to the model. Furthermore, according to the current ambient temperature, battery pack temperature and heating cut-off temperature, the estimated power consumption W required to heat the battery pack to the heating cut-off temperature is determined by looking up in the four-axis calibratable data table. W It should be noted that since the battery pack will also generate heat during the discharge process, when the vehicle is usually used, when the battery pack temperature is heated to the heating cut-off temperature T m Then stop heating.

[0101] Step S06, calculating the current driving range according to the first available power, the estimated power consumption and the first average power consumption.

[0102] In one embodiment of the present invention, the above-mentioned calculation of the driving range at the current moment according to the first available power, the estimated power consumption and the first average power consumption can be achieved by the following steps:

[0103] Calculate the estimated available power of the battery pack after heating is completed according to the first available power and the estimated power consumption;

[0104] The current driving range is calculated based on the estimated available power and the first average power consumption.

[0105] Specifically, according to the first available power W obtained above 1 And the estimated power consumption W W Calculate the estimated available power W of the battery pack after heating is completed 3 :

[0106] W 3 =W 1 -W W ;

[0107] Furthermore, according to the estimated available power W 3 and the first average power consumption Q 1 Calculate the current driving range S 1 :

[0108]

[0109] Therefore, it is possible to ultimately estimate the power consumption during the entire heating process, calculate the average power consumption of other electrical appliances except the battery cell heating components, and calculate the available power of the battery pack corresponding to the heating cut-off temperature in advance, so that the driving range when the heating is completed can be calculated in advance, thereby obtaining the driving range at the current moment excluding the influence of the battery pack temperature on the available power and the influence of the battery pack heating factors.

[0110] Furthermore, the calculated driving range S 1 Displayed on the dashboard.

[0111] Correspondingly, in other embodiments of the present invention, when calculating the first average power consumption during the specified driving time, the possible driving time can be calculated according to the above formula, and then the driving range can be obtained.

[0112] Step S07, calculating a second available power of the battery pack at the battery pack temperature;

[0113] Among them, in one embodiment of the present invention, when it is determined that the vehicle does not turn on the battery cell heating function, the second available power of the battery pack at the battery pack temperature is calculated, which can be specifically implemented by the following steps:

[0114] Get the current SOC of the vehicle;

[0115] According to the current SOC of the vehicle and the battery pack temperature, the second available power at the battery pack temperature is determined by searching in the three-axis calibratable data table;

[0116] The three axes in the three-axis calibratable data table are battery pack temperature, SOC and available power. The three-axis calibratable data table is calibrated according to the physical characteristics of the vehicle battery pack.

[0117] Specifically, referring to the above, at this time, the second available power W at the battery pack temperature is directly determined by searching in the three-axis calibrable data table according to the current SOC of the vehicle and the battery pack temperature. 2 .

[0118] Step S08, calculating the second average power consumption of the vehicle within a specified mileage before the current moment.

[0119] In one embodiment of the present invention, the calculation of the second average power consumption of the vehicle within the specified mileage before the current moment may be implemented by the following steps:

[0120] Collect the vehicle's current real-time speed and mileage, as well as the battery pack's real-time discharge power;

[0121] Calculate the target time required for the vehicle to travel a specified mileage based on the real-time vehicle speed and mileage, where the specified mileage is a calibrable mileage that can be calibrated based on road conditions and display requirements;

[0122] Calculate the average discharge power within the target time according to the target time and the real-time discharge power;

[0123] The second average power consumption of the vehicle when traveling the designated mileage is calculated according to the designated mileage, the average discharge power, and the target time consumption.

[0124] Specifically, referring to the above, the target time t for the vehicle to travel a specified mileage A can be calculated through data processing, and the average discharge power P within the target time t can be calculated based on the real-time discharge power P. 2 :

[0125]

[0126] Furthermore, according to the specified mileage A, average discharge power P 2 , and the target time t to calculate the second average power consumption Q of the vehicle when it travels a specified mileage 2 :

[0127]

[0128] Step S09, calculating the current driving range according to the second available power and the second average power consumption.

[0129] Specifically, referring to the above, according to the second available power W 2 and the second average power consumption Q 2 Calculate the current driving range S 2 :

[0130]

[0131] Furthermore, the calculated driving range S 2 Displayed on the dashboard.

[0132] Further, the process jumps to the start state and repeats the above steps, so that the current driving range of the vehicle can be continuously calculated.

[0133] In summary, the method for calculating the driving range of an electric vehicle in the above-mentioned embodiment of the present invention, by estimating the power consumption during the entire heating process and calculating the average power consumption of other electrical appliances except the battery cell heating component when the battery cell heating function is turned on, and calculating the available power of the battery pack when the heating is completed in advance, can calculate the driving range when the heating is completed in advance, so that the current driving range can be corrected in advance, and the problem of a large jump in the driving range of the vehicle when the battery cell heating function is turned on is avoided. When the battery cell heating function is not turned on, the current accurate driving range is effectively calculated directly according to the available power calculated corresponding to the current battery pack temperature, thereby making the driving range display more accurate and improving the convenience of vehicle use.

[0134] Embodiment 2

[0135] Another aspect of the present invention is to provide a system for calculating the driving range of an electric vehicle. Figure 2 , which is a system for calculating the driving range of an electric vehicle in a second embodiment of the present invention, wherein the system for calculating the driving range of an electric vehicle comprises:

[0136] The information collection module 11 is used to collect the current ambient temperature and battery pack temperature;

[0137] Function determination module 12, used to determine whether the vehicle has activated the battery cell heating function;

[0138] A first available power calculation module 13, configured to calculate a first available power when the battery pack reaches a heating cut-off temperature in the current state when the function determination module 12 determines that the vehicle turns on the battery cell heating function;

[0139] A first average power consumption calculation module 14 is used to calculate a first average power consumption of the vehicle within a specified mileage before the current moment when the function determination module 12 determines that the vehicle turns on the battery cell heating function;

[0140] The estimated power consumption calculation module 15 is used to calculate the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature when the function judgment module 12 judges that the vehicle turns on the battery cell heating function;

[0141] A first driving range calculation module 16, configured to calculate the driving range at the current moment according to the first available power, the estimated power consumption and the first average power consumption when the function determination module 12 determines that the vehicle turns on the battery cell heating function;

[0142] A second available power calculation module 17, configured to calculate a second available power of the battery pack at the battery pack temperature when the function determination module 12 determines that the vehicle has not turned on the battery cell heating function;

[0143] The second average power consumption calculation module 18 is used to calculate the second average power consumption of the vehicle within a specified mileage before the current moment when the function determination module 12 determines that the vehicle has not turned on the battery cell heating function;

[0144] The second driving range calculation module 19 is used to calculate the driving range at the current moment according to the second available power and the second average power consumption when the function determination module 12 determines that the battery cell heating function is not turned on in the vehicle.

[0145] Furthermore, in one embodiment of the present invention, the first average power consumption calculation module 14 includes:

[0146] The first information collection unit is used to collect the current real-time speed and mileage of the vehicle, as well as the real-time discharge power and real-time heating power of the battery pack;

[0147] A first time-consuming time calculation unit is used to calculate the target time-consuming time required for the vehicle to travel a specified mileage according to the real-time vehicle speed and mileage, wherein the specified mileage is a calibrable mileage calibrated according to the road conditions and display requirements;

[0148] A real-time operating power calculation unit, used to calculate the real-time operating power of other electrical appliances except battery pack heating when working according to the real-time discharge power and the real-time heating power;

[0149] An average operating power calculation unit, used to calculate the average operating power within the target time according to the target time and the real-time operating power;

[0150] The first average power consumption calculation unit is used to calculate the first average power consumption of the vehicle when it travels the specified mileage according to the specified mileage, the average operating power, and the target time.

[0151] Furthermore, in one embodiment of the present invention, the first driving range calculation module 16 includes:

[0152] An estimated available power calculation unit, used to calculate the estimated available power of the battery pack after heating is completed according to the first available power and the estimated power consumption;

[0153] The first driving range calculation unit is used to calculate the driving range at a current moment according to the estimated available power and the first average power consumption.

[0154] Furthermore, in one embodiment of the present invention, the first available power calculation module 13 includes:

[0155] A first current SOC acquisition unit, used to acquire a current SOC of the vehicle;

[0156] A first available power determination unit, configured to search and determine a first available power at the heating cut-off temperature in a three-axis calibratable data table according to the current SOC of the vehicle and the heating cut-off temperature, wherein the heating cut-off temperature is a calibratable value calibrated according to the physical characteristics of the vehicle battery and the driving environment;

[0157] The three axes in the three-axis calibrable data table are battery pack temperature, SOC and available power, respectively. The three-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery pack.

[0158] Furthermore, in one embodiment of the present invention, the second average power consumption calculation module 18 includes:

[0159] The second information collection unit is used to collect the current real-time speed and mileage of the vehicle, and the real-time discharge power of the battery pack;

[0160] A second time-consuming time calculation unit is used to calculate the target time-consuming time required for the vehicle to travel a specified mileage according to the real-time vehicle speed and mileage, wherein the specified mileage is a calibrable mileage calibrated according to the road conditions and display requirements;

[0161] An average discharge power calculation unit, used to calculate the average discharge power within the target time according to the target time and the real-time discharge power;

[0162] The second average power consumption calculation unit is used to calculate the second average power consumption of the vehicle when it travels the specified mileage according to the specified mileage, the average discharge power, and the target time.

[0163] Furthermore, in one embodiment of the present invention, the second available power calculation module 17 includes:

[0164] A second current SOC acquisition unit, used to acquire a current SOC of the vehicle;

[0165] A second available power determination unit, configured to search and determine a second available power at the battery pack temperature in a three-axis calibratable data table according to the current SOC of the vehicle and the battery pack temperature;

[0166] The three axes in the three-axis calibrable data table are battery pack temperature, SOC and available power, respectively. The three-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery pack.

[0167] Furthermore, in one embodiment of the present invention, the estimated power consumption calculation module 15 includes:

[0168] An estimated power consumption calculation unit, used to search and determine the estimated power consumption required when the battery pack is heated to the heating cut-off temperature in a four-axis calibrable data table according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature;

[0169] The four axes in the four-axis calibrable data table are respectively the heating cut-off temperature, the ambient temperature, the battery pack temperature, and the power consumption required for heating. The four-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery and the driving environment.

[0170] The functions or operation steps implemented when the above modules and units are executed are generally the same as those in the above method embodiments, and will not be repeated here.

[0171] In summary, the electric vehicle cruising range calculation system in the above-mentioned embodiment of the present invention, by estimating the power consumption during the entire heating process and calculating the average power consumption of other electrical appliances except the battery cell heating component when the battery cell heating function is turned on, and calculating the available power of the battery pack when the heating is completed in advance, can calculate the cruising range when the heating is completed in advance, so that the current cruising range can be corrected in advance, and the problem of a large jump in the vehicle's cruising range when the battery cell heating function is turned on is avoided. When the battery cell heating function is not turned on, the current accurate cruising range is effectively calculated directly according to the available power calculated corresponding to the current battery pack temperature, thereby making the cruising range display more accurate and improving the convenience of vehicle use.

[0172] Embodiment 3

[0173] Another aspect of the present invention also provides an electric vehicle, see Figure 3 , shown is an electric vehicle in the third embodiment of the present invention, including a memory 20, a processor 10, and a computer program 30 stored in the memory 20 and executable on the processor 10. When the processor 10 executes the computer program 30, the electric vehicle range calculation method as described above is implemented.

[0174] Specifically, the electric vehicle may be a pure electric vehicle carrying a ternary lithium battery or a lithium iron phosphate battery. In some embodiments, the processor 10 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chip, which is used to run the program code stored in the memory 20 or process data, such as executing access restriction programs.

[0175] Among them, the memory 20 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. The memory 20 can be an internal storage unit of the electric vehicle in some embodiments, such as the hard disk of the electric vehicle. The memory 20 can also be an external storage device of the electric vehicle in other embodiments, such as a plug-in hard disk equipped on the electric vehicle, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), etc. Further, the memory 20 can also include both an internal storage unit of the electric vehicle and an external storage device. The memory 20 can be used not only to store application software and various types of data installed in the electric vehicle, but also to temporarily store data that has been output or is to be output.

[0176] It should be pointed out that Figure 3 The structure shown does not constitute a limitation on the electric vehicle. In other embodiments, the electric vehicle may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0177] In summary, the electric vehicle in the above-mentioned embodiment of the present invention, by estimating the power consumption during the entire heating process and calculating the average power consumption of other electrical appliances except the battery cell heating components when the battery cell heating function is turned on, and calculating the available power of the battery pack when the heating is completed in advance, can calculate the cruising range when the heating is completed in advance, so that the current cruising range can be corrected in advance, and the problem of a large jump in the cruising range of the vehicle when the battery cell heating function is turned on is avoided. When the battery cell heating function is not turned on, the current accurate cruising range is effectively calculated directly according to the available power calculated corresponding to the current battery pack temperature, thereby making the cruising range display more accurate and improving the convenience of vehicle use.

[0178] The embodiment of the present invention further provides a storage medium on which a computer program is stored. When the program is executed by a processor, the method for calculating the driving range of an electric vehicle as described in the aforementioned method embodiment is implemented.

[0179] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0180] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0181] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0182] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0183] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for calculating the driving range of an electric vehicle, characterized in that: The method comprises: Collect current ambient temperature and battery pack temperature; Determine whether the vehicle has turned on the battery heating function; If it is determined that the vehicle has turned on the battery cell heating function, the first available power when the battery pack reaches the heating cut-off temperature in the current state is calculated; Calculate the first average power consumption of the vehicle within a specified mileage before the current moment; Calculating the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature; Calculating the driving range at the current moment according to the first available power, the estimated power consumption and the first average power consumption; If it is determined that the vehicle does not have a battery cell heating function turned on, calculating a second available power of the battery pack at the battery pack temperature; Calculate the second average power consumption of the vehicle within the specified mileage before the current moment; Calculating the current driving range according to the second available power and the second average power consumption; The step of calculating the first average power consumption of the vehicle within the specified mileage before the current moment comprises: Collect the vehicle's current real-time speed and mileage, as well as the battery pack's real-time discharge power and real-time heating power; Calculating the target time required for the vehicle to travel a specified mileage according to the real-time vehicle speed and the mileage, wherein the specified mileage is a calibrable mileage that can be calibrated according to road conditions and display requirements; Calculate the real-time operating power of other electrical appliances except battery pack heating according to the real-time discharge power and the real-time heating power; Calculate the average operating power within the target time consuming period according to the target time consuming period and the real-time operating power; A first average power consumption of the vehicle when traveling the designated mileage is calculated according to the designated mileage, the average operating power, and the target time.

2. The method for calculating the driving range of an electric vehicle according to claim 1, characterized in that: The step of calculating the current driving range based on the first available power, the estimated power consumption and the first average power consumption includes: Calculating an estimated available power of the battery pack after heating is completed according to the first available power and the estimated power consumption; The current driving range is calculated based on the estimated available power after the heating is completed and the first average power consumption.

3. The method for calculating the driving range of an electric vehicle according to claim 1, characterized in that: The step of calculating the first available power when the battery pack reaches the heating cut-off temperature in the current state comprises: Get the current SOC of the vehicle; According to the current SOC of the vehicle and the heating cut-off temperature, searching in a three-axis calibratable data table to determine the first available power at the heating cut-off temperature, wherein the heating cut-off temperature is a calibratable value calibrated according to the physical characteristics of the vehicle battery and the driving environment; The three axes in the three-axis calibrable data table are battery pack temperature, SOC and available power, respectively. The three-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery pack.

4. The method for calculating the driving range of an electric vehicle according to claim 1, characterized in that: The step of calculating the second average power consumption of the vehicle within the specified mileage before the current moment comprises: Collect the vehicle's current real-time speed and mileage, as well as the battery pack's real-time discharge power; Calculating the target time required for the vehicle to travel a specified mileage according to the real-time vehicle speed and the mileage, wherein the specified mileage is a calibrable mileage that can be calibrated according to road conditions and display requirements; Calculate the average discharge power within the target time according to the target time and the real-time discharge power; A second average power consumption when the vehicle travels the designated mileage is calculated according to the designated mileage, the average discharge power, and the target time consumption.

5. The method for calculating the driving range of an electric vehicle according to claim 1, characterized in that: The step of calculating the second available power of the battery pack at the battery pack temperature comprises: Get the current SOC of the vehicle; Searching and determining a second available power at the battery pack temperature in a three-axis calibratable data table according to the current SOC of the vehicle and the battery pack temperature; The three axes in the three-axis calibrable data table are battery pack temperature, SOC and available power, respectively. The three-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery pack.

6. The method for calculating the driving range of an electric vehicle according to claim 1, characterized in that: The step of calculating the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature comprises: According to the current ambient temperature, the battery pack temperature and the heating cut-off temperature, searching in a four-axis calibrable data table to determine the estimated power consumption required when the battery pack is heated to the heating cut-off temperature; The four axes in the four-axis calibrable data table are respectively the heating cut-off temperature, the ambient temperature, the battery pack temperature, and the power consumption required for heating. The four-axis calibrable data table is calibrated according to the physical characteristics of the vehicle battery and the driving environment.

7. A system for calculating the driving range of an electric vehicle, characterized in that: The system comprises: Information collection module, used to collect current ambient temperature and battery pack temperature; Function judgment module, used to judge whether the vehicle has turned on the battery heating function; A first available power calculation module, used for calculating a first available power when the battery pack reaches a heating cut-off temperature in the current state when the function judgment module judges that the vehicle turns on the battery cell heating function; A first average power consumption calculation module, used for calculating a first average power consumption of the vehicle within a specified mileage before the current moment when the function judgment module determines that the vehicle turns on the battery cell heating function; An estimated power consumption calculation module, used for calculating the estimated power consumption required for heating according to the current ambient temperature, the battery pack temperature and the heating cut-off temperature when the function judgment module judges that the vehicle turns on the battery cell heating function; A first driving range calculation module, configured to calculate the driving range at the current moment according to the first available power, the estimated power consumption and the first average power consumption when the function determination module determines that the vehicle turns on the battery cell heating function; A second available power calculation module, used for calculating a second available power of the battery pack at the battery pack temperature when the function determination module determines that the vehicle has not turned on the battery cell heating function; A second average power consumption calculation module, used for calculating the second average power consumption of the vehicle within a specified mileage before the current moment when the function judgment module determines that the vehicle has not turned on the battery cell heating function; A second driving range calculation module, configured to calculate the driving range at the current moment according to the second available power and the second average power consumption when the function determination module determines that the battery cell heating function is not turned on for the vehicle; The first average power consumption calculation module includes: The first information collection unit is used to collect the current real-time speed and mileage of the vehicle, as well as the real-time discharge power and real-time heating power of the battery pack; A first time-consuming time calculation unit is used to calculate the target time-consuming time required for the vehicle to travel a specified mileage according to the real-time vehicle speed and mileage, wherein the specified mileage is a calibrable mileage calibrated according to the road conditions and display requirements; A real-time operating power calculation unit, used to calculate the real-time operating power of other electrical appliances except battery pack heating when working according to the real-time discharge power and the real-time heating power; An average operating power calculation unit, used to calculate the average operating power within the target time according to the target time and the real-time operating power; The first average power consumption calculation unit is used to calculate the first average power consumption of the vehicle when it travels the specified mileage according to the specified mileage, the average operating power, and the target time.

8. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for calculating the driving range of an electric vehicle as claimed in any one of claims 1 to 6 is implemented.

9. An electric vehicle, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for calculating the driving range of an electric vehicle as claimed in any one of claims 1 to 6 is implemented.

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