Vehicle ev capability enhancement method, apparatus and device, and storage medium and product

Abstract

A vehicle EV capability enhancement method, apparatus and device, and a storage medium and a product, which belong to the technical field of hybrid electric vehicles. The vehicle EV capability enhancement method comprises: acquiring a first permitted discharge power and a second permitted discharge power which are sent by a battery control system in a vehicle to be controlled; when a permitted discharge power increase operating condition is activated, calculating the target permitted usage discharge power of a vehicle system on the basis of the battery level of a battery pack, the temperature of the battery pack, the first permitted discharge power and the second permitted discharge power; and increasing the actual usage discharge power of a battery on the basis of the target permitted usage discharge power of the vehicle system, so as to achieve vehicle EV capability enhancement. By means of the method, when a permitted discharge power increase operating condition is activated, the actual usage discharge power of a battery is increased according to the target permitted usage discharge power of a vehicle system, until the target permitted usage discharge power increase operating condition of the vehicle system is completed, such that the EV capability of a hybrid electric vehicle is enhanced for a short time, thereby improving the user experience.

Description

Vehicle EV capability improvement method, device, equipment, storage medium and product

[0001] The present application claims priority to Chinese Patent Application No. 202410827417.9, filed on June 25, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of hybrid electric vehicles, in particular to a vehicle EV capability improvement method, device, equipment, storage medium and product. BACKGROUND

[0003] In a hybrid vehicle, the maximum capability of the power system in pure electric EV mode is mainly limited by the battery 10s permitted discharge capability and the P3 motor capability. In some special scenarios and working conditions, such as low SOC, high temperature, and low temperature, the permitted discharge power of the high-voltage battery 10s will be reduced, resulting in low pure electric EV power capability. In the process of sudden acceleration and engine starting, the engine needs to be started by allocating driving power, and after the engine is started, the power capability is greatly improved, resulting in the phenomenon of full throttle sudden acceleration jerk or power unevenness. In the current hybrid control technology, the above-mentioned power is generally reserved in the form of reserving electric power, that is, reserving the driving electric power required for engine starting. However, the above-mentioned power reservation method, whether it is full-condition power reservation or scenario-identified early power reservation, will result in the early reservation of power in some normal scenarios, thereby causing complaints about the decline of pure electric EV capability. Therefore, how to short-time improve the EV capability of a hybrid electric vehicle and improve user experience has become a problem to be solved. TECHNICAL PROBLEM

[0004] The main purpose of the present application is to provide a vehicle EV capability improvement method, device, equipment, storage medium and product, which aims to solve the technical problem of how to short-time improve the EV capability of a hybrid electric vehicle and improve user experience. TECHNICAL SOLUTION

[0005] To achieve the above-mentioned purpose, the present application provides a vehicle EV capability improvement method, which comprises the following steps:

[0006] Obtaining the first permitted discharge power and the second permitted discharge power sent by the battery control system in the vehicle to be controlled;

[0007] When the permitted discharge power improvement working condition is activated, calculating the target permitted use discharge power of the vehicle system according to the battery pack electric quantity, the battery pack temperature, the first permitted discharge power and the second permitted discharge power;

[0008] The actual discharge power of the battery is improved based on the target discharge power allowed to be used by the whole vehicle system, so as to improve the EV capability of the vehicle.

[0009] In an embodiment, the first allowed discharge power is greater than the second allowed discharge power, and the discharge duration of the battery pack corresponding to the first allowed discharge power is lower than the discharge duration of the battery pack corresponding to the second allowed discharge power.

[0010] In an embodiment, when the allowed discharge power improvement condition is activated, the step of calculating the target discharge power allowed to be used by the whole vehicle system according to the battery pack electric quantity, the battery pack temperature, the first allowed discharge power and the second allowed discharge power specifically comprises:

[0011] When the allowed discharge power improvement condition is activated, the initial allowed discharge power is calculated according to the battery pack electric quantity, the battery pack temperature, the first allowed discharge power and the second allowed discharge power.

[0012] The electric assist power allowed to be used is determined according to the battery pack electric quantity.

[0013] The minimum power between the initial allowed discharge power and the electric assist power is taken as the target discharge power allowed to be used by the whole vehicle system.

[0014] In an embodiment, the step of calculating the initial allowed discharge power when the allowed discharge power improvement condition is activated according to the battery pack electric quantity, the battery pack temperature, the first allowed discharge power and the second allowed discharge power specifically comprises:

[0015] When the allowed discharge power improvement condition is activated, the power difference between the first allowed discharge power and the second allowed discharge power is calculated.

[0016] The power coefficient is determined according to the battery pack electric quantity and the battery pack temperature, and the power product between the power difference and the power coefficient is calculated.

[0017] The sum of the power product and the second allowed discharge power is taken as the initial allowed discharge power.

[0018] In an embodiment, before the step of calculating the target discharge power allowed to be used by the whole vehicle system according to the battery pack electric quantity, the battery pack temperature, the first allowed discharge power and the second allowed discharge power when the allowed discharge power improvement condition is activated, the method further comprises:

[0019] A request judgment result corresponding to the engine start request and a current gear shifting process are determined.

[0020] The demand judgment result is obtained by judging the EV gear shifting demand according to the current gear shifting process.

[0021] determining whether to activate the permitted discharge power promotion condition according to the request determination result and the demand determination result.

[0022] In an embodiment, the step of determining whether to activate the permitted discharge power promotion condition according to the request determination result and the demand determination result specifically comprises:

[0023] When the request determination result is that an engine start request is received, or the demand determination result is that the engine is in a running state and the target gear corresponding to the vehicle to be controlled is in an EV gear or the current gear is in an EV gear, it is determined that the permitted discharge power promotion condition is activated.

[0024] In an embodiment, the step of promoting the actual discharge power of the battery based on the target permitted discharge power of the vehicle system to promote the EV capability of the vehicle specifically comprises:

[0025] The actual discharge power of the battery is promoted based on the target permitted discharge power of the vehicle system until the permitted discharge power promotion condition is completed.

[0026] After the permitted discharge power promotion condition is completed, the actual discharge power of the battery is controlled based on the second permitted discharge power to promote the EV capability of the vehicle.

[0027] In an embodiment, the step of promoting the actual discharge power of the battery based on the target permitted discharge power of the vehicle system until the permitted discharge power promotion condition is completed specifically comprises:

[0028] The actual discharge power of the battery is promoted based on the target permitted discharge power of the vehicle system until the engine start is completed, or in the engine running state, when the target gear corresponding to the vehicle to be controlled is not in an EV gear and the current gear is not in an EV gear, it is determined that the permitted discharge power promotion condition is completed.

[0029] In addition, to achieve the above-mentioned purpose, the application also provides a vehicle EV capability promotion device, which comprises:

[0030] A permitted discharge power acquisition module is configured to acquire a first permitted discharge power and a second permitted discharge power sent by a battery control system in a vehicle to be controlled.

[0031] A permitted discharge power calculation module is configured to calculate a target permitted discharge power of a vehicle system according to a battery pack power, a battery pack temperature, the first permitted discharge power and the second permitted discharge power when a permitted discharge power promotion condition is activated.

[0032] The vehicle EV capability improving module is configured to improve the actual discharge power of the battery based on the target discharge power of the vehicle system to improve the EV capability of the vehicle.

[0033] In addition, to achieve the above object, the application further provides a vehicle EV capability improving device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the vehicle EV capability improving method.

[0034] In addition, to achieve the above object, the application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the vehicle EV capability improving method.

[0035] In addition, to achieve the above object, the application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the steps of the vehicle EV capability improving method. Advantages

[0036] The application obtains the first and second permitted discharge powers sent by the battery control system in the vehicle to be controlled, and when the permitted discharge power improving condition is activated, the target permitted discharge power of the vehicle system is calculated according to the battery pack power, the battery pack temperature, the first permitted discharge power and the second permitted discharge power, and then the actual discharge power of the battery is improved based on the target permitted discharge power of the vehicle system to improve the EV capability of the vehicle. When the permitted discharge power improving condition is activated, the target permitted discharge power of the vehicle system is improved for a short time, and compared with the existing reserved engine starting use demand driven electric power, the application can improve the target permitted discharge power of the vehicle system for a short time based on the first and second permitted discharge powers of the battery pack when the permitted discharge power improving condition is activated, and then improve the actual discharge power of the battery based on the target permitted discharge power of the vehicle system until the power improving condition is completed, so that the EV capability of the hybrid electric vehicle is improved for a short time, the problem of weak power and uneven driving is avoided, and the user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification.

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings are only for the purpose of illustrating the embodiments of the present application, and for the person of ordinary skill in the art, other drawings can be obtained without creative labor.

[0039] Fig. 1 is a flowchart of the first embodiment of the vehicle EV capability improvement method of the present application;

[0040] Fig. 2 is a flowchart of the second embodiment of the vehicle EV capability improvement method of the present application;

[0041] Fig. 3 is a logic diagram of the calculation of the target permitted discharge power of the whole vehicle system in an embodiment of the vehicle EV capability improvement method of the present application;

[0042] Fig. 4 is a flowchart of the third embodiment of the vehicle EV capability improvement method of the present application;

[0043] Fig. 5 is a flowchart of the whole vehicle EV capability improvement method of an embodiment of the present application;

[0044] Fig. 6 is a structural block diagram of the first embodiment of the vehicle EV capability improvement device of the present application;

[0045] Fig. 7 is a structural diagram of the vehicle EV capability improvement device in the hardware running environment involved in the embodiments of the present application.

[0046] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments. Embodiments of the present application

[0047] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application, and are not used to limit the present application.

[0048] In order to better understand the technical solutions of the present application, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments.

[0049] The main solution of the embodiments of the present application is: obtaining the first permitted discharge power and the second permitted discharge power sent by the battery control system in the vehicle to be controlled; when the permitted discharge power improvement working condition is activated, calculating the target permitted discharge power of the whole vehicle system according to the battery pack power, the battery pack temperature, the first permitted discharge power and the second permitted discharge power; and improving the actual discharge power of the battery based on the target permitted discharge power of the whole vehicle system, so as to improve the EV capability of the vehicle.

[0050] In a hybrid vehicle, the maximum power of the power system in pure electric EV mode is mainly limited by the discharge capacity permitted by the battery 10s and the power of the P3 motor. In some special scenarios and working conditions, such as low SOC, high temperature, and low temperature, the discharge power permitted by the high-voltage battery 10s will be reduced, resulting in low pure electric EV power. In the process of starting the engine in a sudden acceleration, the engine needs to be started by allocating driving power, and the power capability is greatly improved after starting, which causes the phenomenon of sudden acceleration and power unevenness. In the current hybrid control technology, the method of reserving electric power is generally used to process, that is, reserving the electric power required for starting the engine. However, the above-mentioned method of reserving electric power, whether reserving electric power in all working conditions or reserving electric power in advance in identified scenarios, will cause the pure electric EV capability to decrease in some normal scenarios due to the advance reservation of electric power, thereby causing complaints.

[0051] The application obtains the first permitted discharge power and the second permitted discharge power sent by the battery control system in the vehicle to be controlled. When the permitted discharge power improvement working condition is activated, the target permitted use discharge power of the vehicle system is calculated according to the battery pack power, the battery pack temperature, the first permitted discharge power, and the second permitted discharge power. Then, the actual use discharge power of the battery is improved based on the target permitted use discharge power of the vehicle system, so as to improve the EV capability of the vehicle. When the permitted discharge power improvement working condition is activated, the target permitted use discharge power of the vehicle system is improved for a short time. Compared with the existing method of reserving the electric power required for starting the engine, the application can improve the target permitted use discharge power of the vehicle system for a short time based on the first and second permitted discharge powers of the battery pack when the permitted discharge power improvement working condition is activated. Then, the actual use discharge power of the battery is improved based on the target permitted use discharge power of the vehicle system until the power improvement working condition is completed. Thus, the EV capability of the hybrid electric vehicle is improved for a short time, the problem of weak power and uneven driving is avoided, and the user experience is improved.

[0052] It should be noted that the execution subject of the application can be a vehicle power control system, which can include a vehicle control unit (VCU), a microcontroller unit (MCU), and the like.

[0053] Based on this, the application embodiment provides a vehicle EV capability improvement method. Referring to FIG. 1, FIG. 1 is a flowchart of a first embodiment of the vehicle EV capability improvement method of the application.

[0054] In this embodiment, the vehicle EV capability improvement method includes the following steps:

[0055] Step S10: obtaining the first permitted discharge power and the second permitted discharge power sent by a battery control system in the vehicle to be controlled.

[0056] It can be understood that the vehicle to be controlled refers to a hybrid vehicle that needs to improve EV capability, and the EV capability refers to power capability, which can be reflected by maximum torque and maximum power.

[0057] It should be understood that the battery control system can be a battery management system (BMS), and the first permitted discharge power and the second permitted discharge power can be calculated through the battery control system. Specifically, the battery control system can obtain the battery pack power and the battery pack temperature, and then obtain the first permitted discharge power and the second permitted discharge power through battery bench testing.

[0058] Further, in the embodiment, the first permitted discharge power is greater than the second permitted discharge power, and the battery pack discharge duration corresponding to the first permitted discharge power is lower than the battery pack discharge duration corresponding to the second permitted discharge power.

[0059] It can be understood that the first permitted discharge power in the embodiment can be a 2s permitted discharge power, and the second permitted discharge power can be a 10s permitted discharge power. The 2s permitted discharge power is greater than the 10s permitted discharge power, for example, the 2s permitted discharge power is 150 kW, and the 10s permitted discharge power is 100 kW. Moreover, the battery pack discharge duration corresponding to the first permitted discharge power is lower than the battery pack discharge duration corresponding to the second permitted discharge power, i.e., 2s is lower than 10s.

[0060] Step S20: when the permitted discharge power improvement condition is activated, calculating the whole vehicle system target permitted use discharge power according to the battery pack power, the battery pack temperature, the first permitted discharge power, and the second permitted discharge power.

[0061] It should be understood that the permitted discharge power improvement condition refers to a condition in which the permitted discharge power needs to be improved. In a conventional case, the actual use discharge power of the battery is the 10s permitted discharge power. When the permitted discharge power improvement condition is activated, the whole vehicle system target permitted use discharge power can be calculated according to the battery pack power, the battery pack temperature, the first permitted discharge power, and the second permitted discharge power, and the whole vehicle system target permitted use discharge power is between the 2s permitted discharge power and the 10s permitted discharge power.

[0062] It can be understood that after the permission discharge power promotion working condition is activated, a short-term use of EV pure electric capacity is needed for transition, and a short-term permission discharge power function can be activated. After the short-term permission discharge power is activated, considering that the engine starting process or the EV shift process time will exceed 2s, if it is simply constrained within 2s, the driving will be interrupted due to the rapid exit of the short-term permission discharge power. However, if the permission discharge power is promoted for a long time, the high-voltage battery pack has a high-voltage under-voltage risk, so the activation time limit is matched with the maximum constraint of the vehicle power control system. Within the maximum activation time limit, after the engine starting is completed or the EV shift is completed (the target gear or the actual gear is not in EV), the permission discharge power is gradually exited and restored to the normal permission discharge power (10s permission discharge power).

[0063] In a specific implementation, in the case of 2s permission discharge power function activation, the battery 2s permission use power is used as the power system calculation boundary. In a normal case, the battery 2s permission discharge power is much higher than the 10s permission discharge power, and is higher than the maximum rated power of the battery matched by the assembly system. It is unnecessary to use the actual discharge power of the battery beyond the rated power, and in some extremely low temperature and extremely high temperature and extremely low SOC conditions, the battery 2s permission discharge power will not have a greater obvious promotion compared with the 10s permission discharge power. In order to reduce the under-voltage risk, it is unnecessary to use the 2s discharge power or to use the 2s discharge power at a reduced rate. Therefore, the actual 2s discharge power is constrained according to the 10s permission discharge power used in a normal manner, and thus the target permission use discharge power of the vehicle system needs to be calculated.

[0064] Further, in order to accurately determine whether to activate the permission discharge power promotion working condition, in the embodiment, before the step S20, the method further includes: determining an engine starting request corresponding request determination result and a current shift process; performing an EV shift demand judgment according to the current shift process to obtain a demand judgment result; and determining whether to activate the permission discharge power promotion working condition according to the request determination result and the demand judgment result.

[0065] It can be understood that the request determination result can include receiving an engine starting request and not receiving an engine starting request. The current shift process refers to the shift process of the vehicle to be controlled at the current time, for example, from 1st gear to 2nd gear, from 2nd gear to EV gear, etc. Then, the demand judgment result is obtained by performing an EV shift demand judgment according to the current shift process. The demand judgment result can include a gear passing through EV gear. Finally, whether to activate the permission discharge power promotion working condition is determined according to the request determination result and the demand judgment result.

[0066] Further, in order to accurately determine whether to perform the through-EV shift demand determination, in the embodiment, the step of determining whether to activate the discharge power permission promotion condition according to the request determination result and the demand determination result specifically includes: when the request determination result is that the engine start request is received, or the demand determination result is that the target gear of the vehicle to be controlled passes through the EV gear in the engine running state, it is determined that the discharge power permission promotion condition is activated.

[0067] It should be understood that when the request determination result is that the engine start request is received, or the demand determination result is that the target gear of the vehicle to be controlled passes through the EV gear in the engine running state, the target gear refers to the gear to be switched by the vehicle to be controlled, for example, the gears corresponding to the vehicle to be controlled include 1st gear, 2nd gear, EV gear, 3rd gear, 4th gear, when the target gear is the 3rd gear, the gear changes from 1st gear-2nd gear-EV gear-3rd gear, at this time, the EV gear is passed, that is, the target gear passes through the EV gear; or the demand determination result is that the current gear of the vehicle to be controlled is the EV gear, that is, the gear of the vehicle to be controlled at the current time is the EV gear. In the above three cases, it is determined that the discharge power permission promotion condition can be activated.

[0068] Step S30: promoting the actual discharge power of the battery based on the target discharge power of the vehicle system to promote the EV capability of the vehicle.

[0069] It can be understood that the target discharge power of the vehicle system is between the 2s discharge power permission and the 10s discharge power permission, but the target discharge power of the vehicle system in a normal case is the 10s discharge power permission of the battery pack, therefore, adjusting the target discharge power of the vehicle system to the 2s discharge power permission, or between the two, can promote the discharge power permission of the vehicle system from the battery pack, and then promoting the actual discharge power of the battery based on the target discharge power of the vehicle system, thereby promoting the EV capability of the vehicle.

[0070] The embodiment obtains the first permitted discharge power and the second permitted discharge power sent by the battery control system in the vehicle to be controlled. When the permitted discharge power promotion condition is activated, the vehicle system target permitted use discharge power is calculated according to the battery pack electric quantity, the battery pack temperature, the first permitted discharge power and the second permitted discharge power. Then, the battery actual use discharge power is promoted based on the vehicle system target permitted use discharge power, so as to promote the EV capability of the vehicle. When the permitted discharge power promotion condition is activated, the battery actual use discharge power is promoted based on the vehicle system target permitted use discharge power in the application. Compared with the existing reserved engine starting use demand driven electric power, the embodiment can promote the vehicle system target permitted use discharge power for a short time when the permitted discharge power promotion condition is activated, and then promote the battery actual use discharge power based on the vehicle system target permitted use discharge power until the power promotion condition is completed. Therefore, the EV capability of the hybrid electric vehicle is promoted for a short time, the problem of weak power and uneven driving is avoided, and the user experience is improved.

[0071] Referring to FIG. 2, FIG. 2 is a flowchart of a second embodiment of the vehicle EV capability promotion method.

[0072] Based on the first embodiment, in the embodiment, the step S20 comprises:

[0073] Step S201: When the permitted discharge power promotion condition is activated, the initial permitted discharge power is calculated according to the battery pack electric quantity, the battery pack temperature, the first permitted discharge power and the second permitted discharge power.

[0074] It can be understood that when the permitted discharge power promotion condition is activated, the initial permitted discharge power can be calculated according to the battery pack electric quantity, the battery pack temperature, the first permitted discharge power and the second permitted discharge power in the embodiment. The initial permitted discharge power refers to the initial permitted use battery actual use discharge power.

[0075] Further, in order to accurately obtain the initial permitted discharge power, in the embodiment, the step S201 comprises: when the permitted discharge power promotion condition is activated, the power difference between the first permitted discharge power and the second permitted discharge power is calculated; the power coefficient is determined according to the battery pack electric quantity and the battery pack temperature, and the power product between the power difference and the power coefficient is calculated; and the sum of the power product and the second permitted discharge power is taken as the initial permitted discharge power.

[0076] It should be understood that, referring to Figure 3, which is a logic diagram of calculating the target permitted discharge power of the vehicle system according to an embodiment of the vehicle EV capability enhancement method of this application, when the permitted discharge power enhancement condition is activated, the power difference between the first permitted discharge power and the second permitted discharge power can be calculated, that is, the difference P between the 2s permitted discharge power and the 10s permitted discharge power can be calculated. error .

[0077] Understandably, considering that batteries at extremely low or high temperatures may experience undervoltage due to high discharge power at extremely low SOC, a discharge power coefficient Kr is determined based on the battery pack temperature T and the battery pack SOC to avoid undervoltage caused by a short-term increase in discharge capacity. The Kr coefficient calibration table is shown in Table 1 below. The lower the battery pack SOC, and the lower the battery pack temperature (too high or too low), the lower the Kr coefficient.

[0078] Table 1:

[0079] SOC1SOC2SOC3SOC4SOC5T1Kr11Kr12Kr13Kr14Kr15T2Kr21Kr22Kr23Kr24Kr25T3Kr31Kr32Kr33Kr34Kr35T4Kr41Kr42Kr44Kr44Kr45

[0080] In practical implementation, the power coefficient Kr can be obtained by referring to Table 1 based on the battery pack capacity and battery pack temperature, and the power difference P can be calculated. error The product of the power coefficient Kr is taken as the power product. The sum of the power product and the second permitted discharge power is taken as the initial permitted discharge power. That is, the sum of the power product and the 10s permitted discharge power is taken as the initial permitted discharge power P. BMS_inter .

[0081] Step S202: Determine the permissible electric assist power based on the battery pack capacity.

[0082] Understandably, this embodiment takes into account that if the battery pack capacity is low, excessive use of the actual discharge power of the battery would further reduce the battery pack capacity, thereby increasing the risk of the high-voltage system malfunctioning. To avoid extremely low battery pack capacity, the permissible electric assist power P is determined based on the battery pack capacity. e-boost Table 2 shows P e-boost The calibration table shows that the lower the battery pack charge, the lower the permissible electric assist power P. e-boost The smaller.

[0083] Table 2:

[0084] SOC1 SOC2 SOC3 SOC4 SOC5 Pe-boost1 Pe-boost2 Pe-boost3 Pe-boost4 Pe-boost5

[0085] Step S203: taking the minimum power between the initial permitted discharge power and the electric assist power as the whole vehicle system target permitted use discharge power.

[0086] It should be understood that the minimum power between the initial permitted discharge power P BMS_inter and the electric assist power P e-boost may be taken as the whole vehicle system target permitted use discharge power P allow . Through the above control logic, it can be seen that P allow is between the 10s permitted discharge power and the 2s permitted discharge power.

[0087] The embodiment calculates the initial permitted discharge power according to the battery pack electric quantity, the battery pack temperature, the first permitted discharge power and the second permitted discharge power when the permitted discharge power boosting condition is activated, then determines the permitted use electric assist power according to the battery pack electric quantity, and takes the minimum power between the initial permitted discharge power and the electric assist power as the whole vehicle system target permitted use discharge power. The embodiment calculates the initial permitted discharge power according to the battery pack electric quantity, the battery pack temperature, the first permitted discharge power and the second permitted discharge power when the permitted discharge power boosting condition is activated, and takes the minimum power between the initial permitted discharge power and the electric assist power as the whole vehicle system target permitted use discharge power, so that the whole vehicle system target permitted use discharge power can be automatically and accurately calculated.

[0088] Referring to FIG. 4, FIG. 4 is a flowchart of the third embodiment of the vehicle EV capability boosting method.

[0089] Based on the above embodiments, in the present embodiment, the step S30 comprises:

[0090] Step S301: boosting the battery actual use discharge power based on the whole vehicle system target permitted use discharge power until the permitted discharge power boosting condition is completed.

[0091] It can be understood that the present embodiment can boost the battery actual use discharge power based on the whole vehicle system target permitted use discharge power, and the battery actual use discharge power is boosted for a short time until the permitted discharge power boosting condition is completed.

[0092] Further, in order to effectively determine whether the permitted discharge power promotion condition is completed, in the embodiment, the step S301 comprises: promoting the actual discharge power of the battery based on the target permitted discharge power of the vehicle system until the engine starts, or when the target gear of the vehicle to be controlled is not in the EV gear and the current gear is not in the EV gear under the engine running state, determining that the permitted discharge power promotion condition is completed.

[0093] It should be understood that the actual discharge power of the battery can be promoted based on the target permitted discharge power of the vehicle system, and the promotion time length can be a preset time length which can be determined according to actual vehicle test and can be set to 2-3s. After the actual discharge power of the battery is promoted for the preset time length, or the engine starts, or when the target gear of the vehicle to be controlled is not in the EV gear and the current gear is not in the EV gear under the engine running state, that is, in the above three cases, it is determined that the permitted discharge power promotion condition is completed.

[0094] Step S302: After the permitted discharge power promotion condition is completed, the actual discharge power of the battery is controlled based on the second permitted discharge power to promote the EV capability of the vehicle.

[0095] It should be understood that after the permitted discharge power promotion condition is completed, the actual discharge power of the battery can be controlled based on the second permitted discharge power, that is, the actual discharge power of the battery is controlled to return to the conventional 10s permitted discharge power to promote the EV capability of the vehicle.

[0096] In a specific implementation, referring to FIG. 5, FIG. 5 is a schematic diagram of the overall flow of the vehicle EV capability promotion method according to an embodiment of the application. As shown in FIG. 5, the embodiment can first determine whether the permitted discharge power promotion condition is activated, if yes, promote the actual discharge power of the battery, then determine whether the promotion time length reaches the preset time length, if yes, return to the conventional 10s permitted discharge power, if no, determine whether the permitted discharge power promotion condition is completed, if yes, return to the conventional 10s permitted discharge power.

[0097] The embodiment is based on the whole vehicle system target permitted discharge power to improve the actual discharge power of the battery until the permitted discharge power improvement condition is completed, and after the permitted discharge power improvement condition is completed, the actual discharge power of the battery is controlled based on the second permitted discharge power to improve the EV capability of the vehicle. The embodiment is based on the whole vehicle system target permitted discharge power to improve the actual discharge power of the battery until the permitted discharge power improvement condition is completed, and the improvement time of the whole vehicle system target permitted discharge power control can be determined, and after the permitted discharge power improvement condition is completed, the actual discharge power of the battery is controlled based on the second permitted discharge power, so that the EV capability of the hybrid electric vehicle is improved for a short time.

[0098] Referring to FIG. 6, FIG. 6 is a structural block diagram of the first embodiment of the vehicle EV capability improvement device.

[0099] As shown in FIG. 6, the vehicle EV capability improvement device provided by the embodiment includes:

[0100] The permitted discharge power acquisition module 10 is configured to acquire the first permitted discharge power and the second permitted discharge power sent by the battery control system in the vehicle to be controlled;

[0101] The permitted discharge power calculation module 20 is configured to calculate the whole vehicle system target permitted discharge power according to the battery pack power, the battery pack temperature, the first permitted discharge power and the second permitted discharge power when the permitted discharge power improvement condition is activated.

[0102] The vehicle EV capability improvement module 30 is configured to improve the actual discharge power of the battery based on the whole vehicle system target permitted discharge power to improve the EV capability of the vehicle.

[0103] The embodiment obtains the first permitted discharge power and the second permitted discharge power sent by the battery control system in the vehicle to be controlled. When the permitted discharge power promotion condition is activated, the vehicle system target permitted use discharge power is calculated according to the battery pack electric quantity, the battery pack temperature, the first permitted discharge power and the second permitted discharge power. The battery actual use discharge power is promoted based on the vehicle system target permitted use discharge power, so as to promote the EV capability of the vehicle. When the permitted discharge power promotion condition is activated, the battery actual use discharge power is promoted based on the vehicle system target permitted use discharge power in the application. Compared with the existing reserved engine start use demand driven electric power, the embodiment can promote the vehicle system target permitted use discharge power for a short time based on the first and second permitted discharge powers of the battery pack when the permitted discharge power promotion condition is activated. Then, the battery actual use discharge power is promoted based on the vehicle system target permitted use discharge power until the power promotion condition is completed. Therefore, the EV capability of the hybrid electric vehicle is promoted for a short time, the problem of weak power and uneven driving is avoided, and the user experience is improved.

[0104] It should be noted that the above-described workflow is only illustrative and does not limit the protection scope of the application. In actual application, a person skilled in the art can select part or all of them according to actual needs to achieve the purpose of the embodiment scheme, which is not limited here.

[0105] In addition, technical details not described in detail in the embodiment can be referred to the vehicle EV capability promotion method provided by any embodiment of the application, which will not be described here.

[0106] Based on the first embodiment of the vehicle EV capability promotion device described above, the second embodiment of the vehicle EV capability promotion device of the application is proposed.

[0107] In the embodiment, the first permitted discharge power is greater than the second permitted discharge power, and the battery pack discharge duration corresponding to the first permitted discharge power is lower than the battery pack discharge duration corresponding to the second permitted discharge power.

[0108] Further, the permitted discharge power calculation module 20 is further configured to calculate an initial permitted discharge power according to the battery pack electric quantity, the battery pack temperature, the first permitted discharge power and the second permitted discharge power when the permitted discharge power promotion condition is activated; determine the permitted use electric assist power according to the battery pack electric quantity; and take the minimum power between the initial permitted discharge power and the electric assist power as the vehicle system target permitted use discharge power.

[0109] Further, the permitted discharge power calculation module 20 is further configured to, when the permitted discharge power promotion condition is activated, calculate a power difference between the first permitted discharge power and the second permitted discharge power; determine a power coefficient according to the battery pack electric quantity and the battery pack temperature, and calculate a power product between the power difference and the power coefficient; and take a sum of the power product and the second permitted discharge power as an initial permitted discharge power.

[0110] Further, the permitted discharge power calculation module 20 is further configured to determine a request judgment result corresponding to an engine start request and a current gear shifting process; determine a demand judgment result according to a through-EV gear shifting demand judgment result according to the current gear shifting process; and determine whether to activate the permitted discharge power promotion condition according to the request judgment result and the demand judgment result.

[0111] Further, the permitted discharge power calculation module 20 is further configured to determine that the permitted discharge power promotion condition is activated when the request judgment result is that the engine start request is received, or the demand judgment result is that the target gear of the vehicle to be controlled is a through-EV gear or the current gear is an EV gear in an engine running state.

[0112] Further, the vehicle EV capability promotion module 30 is further configured to promote the actual discharge power of the battery based on the target permitted discharge power of the whole vehicle system until the permitted discharge power promotion condition is completed; and control the actual discharge power of the battery based on the second permitted discharge power to promote the EV capability of the vehicle after the permitted discharge power promotion condition is completed.

[0113] Further, the vehicle EV capability promotion module 30 is further configured to promote the actual discharge power of the battery based on the target permitted discharge power of the whole vehicle system until the permitted discharge power promotion condition is completed; and control the actual discharge power of the battery based on the second permitted discharge power to promote the EV capability of the vehicle after the permitted discharge power promotion condition is completed.

[0114] Other embodiments or specific implementations of the vehicle EV capability promotion device provided in the present application can refer to the above-mentioned method embodiments, and will not be described here.

[0115] The present application provides a vehicle EV capability promotion device, which comprises at least one processor and a memory in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the vehicle EV capability promotion method in the above-mentioned embodiment I.

[0116] Reference is now made to FIG. 7, which shows a structural diagram of a vehicle EV capability enhancement device suitable for implementing embodiments of the present application. The vehicle EV capability enhancement device in embodiments of the present application can include, but is not limited to, a mobile terminal such as a mobile phone, a notebook computer, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Portable Application Description), a PMP (Portable Media Player), a car terminal (e.g., a car navigation terminal), and the like, as well as a stationary terminal such as a digital TV, a desktop computer, and the like. The vehicle EV capability enhancement device shown in FIG. 7 is merely an example and should not impose any limitation on the function and use range of embodiments of the present application.

[0117] As shown in FIG. 7, the vehicle EV capability enhancement device can include a processing device 1001 (e.g., a central processor, a graphic processor, etc.) that can perform various appropriate actions and processes according to a program stored in a ROM (Read Only Memory) 1002 or a program loaded from a storage device 1003 into a RAM (Random Access Memory) 1004. In the RAM 1004, various programs and data required for operation of the vehicle EV capability enhancement device are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An I / O (Input / Output) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, and the like; an output device 1008 including, for example, an LCD (Liquid Crystal Display), a speaker, a vibrator, and the like; the storage device 1003 including, for example, a magnetic tape, a hard disk, and the like; and a communication device 1009. The communication device 1009 can allow the vehicle EV capability enhancement device to communicate wirelessly or by wire with other devices to exchange data. Although the vehicle EV capability enhancement device having various systems is shown in the figure, it should be understood that all the shown systems are not required to be implemented or provided. More or less systems can be alternatively implemented or provided.

[0118] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program codes for executing the method shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiments disclosed in the present application are executed.

[0119] The vehicle EV capability improving device provided by the present application adopts the vehicle EV capability improving method in the above-mentioned embodiments, and can solve the technical problem of how to improve the EV capability of a hybrid vehicle for a short time and improve user experience. Compared with the prior art, the vehicle EV capability improving device provided by the present application has the same beneficial effects as the vehicle EV capability improving method provided by the above-mentioned embodiments, and other technical features in the vehicle EV capability improving device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0120] It should be understood that various parts of the present application can be realized by hardware, software, firmware or a combination thereof. In the description of the above-mentioned embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0121] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0122] The present application provides a computer readable storage medium having stored thereon computer readable program instructions (i.e. computer program) for executing the vehicle EV capability improving method in the above-mentioned embodiments.

[0123] The computer readable storage medium provided in the application may be, for example, a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination thereof. More specific examples of the computer readable storage medium may include, but are not limited to, an electric connection with one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the embodiment, the computer readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), and the like, or any suitable combination thereof.

[0124] The above computer readable storage medium may be contained in the vehicle EV capability improvement device, or may exist separately without being assembled into the vehicle EV capability improvement device.

[0125] The above computer readable storage medium carries one or more programs, when the one or more programs are executed by the vehicle EV capability improvement device, the vehicle EV capability improvement device is caused to: acquire a first permitted discharge power and a second permitted discharge power sent by a battery control system in a vehicle to be controlled; when the permitted discharge power improvement condition is activated, calculate a whole vehicle system target permitted use discharge power according to a battery pack electric quantity, a battery pack temperature, the first permitted discharge power, and the second permitted discharge power; and improve a battery actual use discharge power based on the whole vehicle system target permitted use discharge power, so as to improve the vehicle EV capability.

[0126] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0127] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0128] The modules involved in the embodiments of the present application can be implemented in the manner of software, or can be implemented in the manner of hardware. Among them, the name of the module does not constitute a limitation of the unit itself in some cases.

[0129] The readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e. computer program) for executing the vehicle EV capability improvement method described above, and can solve the technical problem of how to improve the EV capability of the hybrid electric vehicle for a short time and improve the user experience. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the vehicle EV capability improvement method provided by the above-mentioned embodiments, which will not be repeated here.

[0130] The application further provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the vehicle EV capability improving method as described above.

[0131] The computer program product provided by the application can solve the technical problem of how to improve the EV capability of a hybrid vehicle for a short time and improve the user experience. Compared with the prior art, the computer program product provided by the application has the same beneficial effects as the vehicle EV capability improving method provided by the above-mentioned embodiments, and will not be described here.

[0132] The above only describes some embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or direct / indirect application in other related technical fields based on the technical concept of the application and the content of the specification and drawings are included in the patent protection scope of the application.

Claims

1. A vehicle EV capability enhancement method, wherein, The vehicle EV capability improving method comprises the following steps: Obtaining the first and second permitted discharging powers sent by a battery control system in a vehicle to be controlled; When the permitted discharging power improving condition is activated, calculating a target permitted discharging power of a vehicle system according to the battery pack electric quantity, the battery pack temperature, the first permitted discharging power and the second permitted discharging power; Based on the target permitted discharging power of the vehicle system, the actual discharging power of the battery is improved to improve the EV capability of the vehicle.

2. The vehicle EV capability boost method of claim 1, wherein, The first permitted discharging power is greater than the second permitted discharging power, and the battery pack discharging duration corresponding to the first permitted discharging power is lower than the battery pack discharging duration corresponding to the second permitted discharging power.

3. The vehicle EV capability boost method of claim 2, wherein, The step of calculating the target permitted discharging power of the vehicle system according to the battery pack electric quantity, the battery pack temperature, the first permitted discharging power and the second permitted discharging power when the permitted discharging power improving condition is activated specifically comprises: When the permitted discharging power improving condition is activated, calculating an initial permitted discharging power according to the battery pack electric quantity, the battery pack temperature, the first permitted discharging power and the second permitted discharging power; Determining an electric assist power to be used according to the battery pack electric quantity; Taking the minimum power between the initial permitted discharging power and the electric assist power as the target permitted discharging power of the vehicle system.

4. The vehicle EV capability boost method of claim 3, wherein, The step of calculating the initial permitted discharging power according to the battery pack electric quantity, the battery pack temperature, the first permitted discharging power and the second permitted discharging power when the permitted discharging power improving condition is activated specifically comprises: When the permitted discharging power improving condition is activated, calculating a power difference between the first permitted discharging power and the second permitted discharging power; Determining a power coefficient according to the battery pack electric quantity and the battery pack temperature, and calculating a power product between the power difference and the power coefficient; Taking the sum of the power product and the second permitted discharging power as the initial permitted discharging power.

5. The vehicle EV capability boost method of claim 1, wherein, Before the step of calculating the target permitted discharging power of the vehicle system according to the battery pack electric quantity, the battery pack temperature, the first permitted discharging power and the second permitted discharging power when the permitted discharging power improving condition is activated, the method further comprises: Determining a request judgment result corresponding to an engine start request and a current gear shifting process; Judging a demand judgment result according to the current gear shifting process; Judging whether to activate the permitted discharging power improving condition according to the request judgment result and the demand judgment result.

6. The vehicle EV capability boost method of claim 5, wherein, The step of judging whether to activate the permitted discharging power improving condition according to the request judgment result and the demand judgment result specifically comprises: When the request judgment result is that the engine start request is received, or the demand judgment result is that the target gear of the vehicle to be controlled is an EV gear or the current gear is an EV gear under the engine running state, it is determined that the permitted discharging power improving condition is activated.

7. The vehicle EV capability boost method of any one of claims 1-6, wherein, The step of improving the actual discharging power of the battery based on the target permitted discharging power of the vehicle system to improve the EV capability of the vehicle specifically comprises: The actual discharge power of the battery is improved based on the target discharge power allowed to be used by the whole vehicle system until the discharge power allowed to be used is improved to a condition that is completed. After the condition that the discharge power allowed to be used is improved is completed, the actual discharge power of the battery is controlled based on the second discharge power allowed to be used to improve the EV capability of the vehicle.

8. The vehicle EV capability boost method of claim 7, wherein, The step of improving the actual discharge power of the battery based on the target discharge power allowed to be used by the whole vehicle system until the condition that the discharge power allowed to be used is improved is completed specifically includes: The actual discharge power of the battery is improved based on the target discharge power allowed to be used by the whole vehicle system until the discharge power allowed to be used is improved to a condition that is completed.

9. A vehicle EV capability enhancement apparatus, wherein, The vehicle EV capability improving device includes: The discharge power allowed to be used is obtained by a discharge power allowed to be used acquisition module. The target discharge power allowed to be used by the whole vehicle system is calculated by a discharge power allowed to be used calculation module based on the battery pack electric quantity, the battery pack temperature, the first discharge power allowed to be used and the second discharge power allowed to be used when the condition that the discharge power allowed to be used is improved is activated. The actual discharge power of the battery is improved based on the target discharge power allowed to be used by the whole vehicle system to improve the EV capability of the vehicle by a vehicle EV capability improving module.

10. A vehicle EV capability enhancement device, wherein, The device includes a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the vehicle EV capability improving method according to any one of claims 1 to 8.

11. A storage medium, wherein, The storage medium is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the vehicle EV capability improving method according to any one of claims 1 to 8.

12. A computer program product, wherein, The computer program product includes a computer program, and the computer program is executed by the processor to implement the steps of the vehicle EV capability improving method according to any one of claims 1 to 8.

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