Control method, device and equipment for full-power slope sliding of electric vehicle and storage medium

Abstract

The invention discloses a control method, device and equipment for full-power slope sliding of an electric vehicle and a computer readable storage medium, and the method comprises the steps: determining whether the vehicle is in a slope sliding state or not according to the obtained gear information of the current vehicle and the direction of the rotating speed of a motor; if it is determined that the vehicle is in the slope sliding state, whether a battery pack is in a full charge state or not is determined according to the obtained SOC of the battery pack of the vehicle and the available recharging capacity power value of the battery pack; if it is determined that the battery pack is in the full-power state, a full-power slope sliding strategy is activated, and the full-power slope sliding strategy comprises the steps that a locked-rotor request is sent to a first motor, and negative torque is sent to a second motor; and the first motor and the second motor are controlled according to the activated full-power slope sliding strategy, the vehicle is prevented from sliding on the slope, and the technical problems that the total discharge space of a battery is reduced, the power endurance mileage of the whole vehicle is affected, the cost is additionally increased and the slope sliding working condition response is full in the vehicle full-power slope sliding in the related technology are solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a control method, device, equipment and computer-readable storage medium for an electric vehicle to roll down a slope when fully charged. Background Art

[0002] For electric vehicles, the recharge power of the power battery pack is relatively small at high SOC, and the power battery pack will have the problem of rolling downhill after being fully charged. If the power battery pack reserves a part of the SOC interval to ensure the recharge power after being fully charged, it will lead to a reduction in the total discharge space of the battery, affecting the electric range of the vehicle; if a hydraulic braking compensation strategy is adopted to control the vehicle through hydraulic braking when rolling downhill with full power, the chassis control system and the vehicle controller need to be coordinated and controlled, which will increase the cost; if the recharge capacity is obtained by increasing the power consumption of high-voltage accessories under the condition of rolling downhill with full power, the power of high-voltage accessories will rise slowly, and the reaction to the rolling downhill condition will not be fast enough. Therefore, there is an urgent need for a method to solve the problem of electric vehicles rolling downhill with full power. Summary of the invention

[0003] The present application provides a control method, device, equipment and computer-readable storage medium for an electric vehicle with a full charge rolling down a slope, which can solve the technical problems in the prior art that the total battery discharge space is reduced when the vehicle rolls down a slope with a full charge, which affects the electric range of the entire vehicle, increases additional costs and has insufficient response to rolling down slope conditions.

[0004] In a first aspect, an embodiment of the present application provides a method for controlling a fully charged electric vehicle to roll down a slope, the method comprising:

[0005] Determine whether the vehicle is in a sliding slope state by obtaining the current vehicle gear information and the direction of the motor speed;

[0006] If it is determined that the vehicle is in a rolling slope state, determining whether the battery pack is fully charged according to the SOC of the battery pack of the vehicle and the power value of the available recharging capacity of the battery pack;

[0007] If it is determined that the battery pack is in a fully charged state, a full-charge ramp strategy is activated, wherein the full-charge ramp strategy includes sending a stall request to the first motor and sending a negative torque to the second motor;

[0008] The first motor and the second motor are controlled according to the activated full-charge rolling downhill strategy to prevent the vehicle from rolling down the hill.

[0009] In combination with the first aspect, in one implementation, determining whether the vehicle is in a sliding slope state according to obtaining the current gear information of the vehicle and the direction of the motor speed includes:

[0010] Get the current vehicle gear information and motor speed direction;

[0011] Obtaining the direction corresponding to the gear information of the current vehicle through the gear information of the current vehicle;

[0012] Determining whether the vehicle is in a sliding slope state by judging whether the direction corresponding to the gear information is consistent with the direction of the motor speed;

[0013] If the direction corresponding to the gear information is inconsistent with the direction of the motor speed, it is determined that the vehicle is in a sliding downhill state.

[0014] In combination with the first aspect, in one implementation, determining whether the battery pack is in a fully charged state according to obtaining the battery pack SOC of the vehicle and the available recharging capacity power value of the battery pack includes:

[0015] Obtain the battery pack SOC and the available recharging power value of the battery pack;

[0016] If the SOC of the battery pack is greater than or equal to the preset SOC, and the available recharging power value of the battery pack is less than or equal to the preset power value, it is determined that the battery pack is in a fully charged state.

[0017] In combination with the first aspect, in one implementation, controlling the first motor and the second motor according to the activated full-power rolling downhill strategy to prevent the vehicle from rolling downhill includes:

[0018] The full-charge ramp strategy includes sending a stall request to the first motor, controlling the first motor to work based on the stall power carried by the stall request, so as to consume the power of the battery pack;

[0019] The full-charge strategy includes sending negative torque to the second motor to control the second motor to work based on the negative torque to charge the battery pack and prevent the vehicle from rolling down the slope.

[0020] In combination with the first aspect, in one implementation, after preventing the vehicle from sliding down the slope, the method further includes:

[0021] Obtaining the gear position information of the vehicle after sliding down the slope and the direction of the speed of the speed motor;

[0022] Determining whether the vehicle is in a sliding slope state according to the gear information of the vehicle after sliding slope and the direction of the speed of the speed motor;

[0023] If it is determined that the vehicle is not in a rolling hill state, the full-charge rolling hill strategy is exited.

[0024] In combination with the first aspect, in one implementation, after preventing the vehicle from sliding down the slope, the method further includes:

[0025] Get the duration of preventing the vehicle from sliding down the slope;

[0026] If the duration for preventing the vehicle from rolling down the slope is greater than or equal to the preset duration, the full-power rolling down the slope strategy is exited, and the electronic parking method is used to prevent the vehicle from rolling down the slope.

[0027] In combination with the first aspect, in one implementation, the stall power is the same as the power corresponding to the negative torque.

[0028] In a second aspect, an embodiment of the present application provides a control device for a fully-charged electric vehicle to roll down a slope, the control device for a fully-charged electric vehicle to roll down a slope comprising:

[0029] A first determination module is used to determine whether the vehicle is in a sliding slope state according to the current gear information of the vehicle and the direction of the motor speed;

[0030] A second determination module is used to determine whether the battery pack is fully charged according to the SOC of the battery pack of the vehicle and the power value of the available recharging capacity of the battery pack if it is determined that the vehicle is in a sliding state;

[0031] an activation strategy module, configured to activate a full-charge ramp strategy if it is determined that the battery pack is in a fully-charged state, wherein the full-charge ramp strategy includes sending a stall request to the first motor and sending a negative torque to the second motor;

[0032] The control module is used to control the first motor and the second motor according to the activated full-charge rolling downhill strategy to prevent the vehicle from rolling down the hill.

[0033] In a third aspect, an embodiment of the present application provides a control device for an electric vehicle that rolls down a slope when fully charged, the control device for an electric vehicle that rolls down a slope when fully charged comprises a processor, a memory, and a control program for an electric vehicle that rolls down a slope when fully charged, the program being stored in the memory and executable by the processor, wherein when the control program for an electric vehicle that rolls down a slope when fully charged is executed by the processor, the steps of the control method for an electric vehicle that rolls down a slope when fully charged as described above are implemented.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which is stored a control program for an electric vehicle to coast down a hill when fully charged. When the control program for an electric vehicle to coast down a hill when fully charged is executed by a processor, the steps of the control method for an electric vehicle to coast down a hill when fully charged as described above are implemented.

[0035] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0036] By obtaining the gear information of the current vehicle and the direction of the motor speed, it is determined whether the vehicle is in a rolling hill state; if it is determined that the vehicle is in a rolling hill state, whether the battery pack is fully charged is determined by obtaining the battery pack SOC of the vehicle and the power value of the available recharging capacity of the battery pack; if it is determined that the battery pack is fully charged, the full-charge rolling hill strategy is activated, and the full-charge rolling hill strategy includes sending a stall request to the first motor and sending a negative torque to the second motor; the first motor and the second motor are controlled according to the activated full-charge rolling hill strategy to prevent the vehicle from rolling down the hill, which solves the technical problems in the related art that the total battery discharge space is reduced when the vehicle is fully charged and the electric range of the whole vehicle is affected, the additional cost is increased, and the rolling hill condition response is insufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a flow chart of a first embodiment of a method for controlling a fully-charged electric vehicle to coast downhill;

[0038] Figure 2 This is a flow chart of a second embodiment of a method for controlling a fully-charged electric vehicle to roll down a slope;

[0039] Figure 3 This is a functional module diagram of an embodiment of a control device for rolling down a slope when the electric vehicle is fully charged;

[0040] Figure 4 This is a schematic diagram of the hardware structure of a control device for a fully-charged electric vehicle rolling down a hill involved in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] First, some technical terms in the present application are explained to facilitate those skilled in the art to understand the present application.

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0044] In a first aspect, an embodiment of the present application provides a method for controlling a fully-charged electric vehicle to roll down a hill.

[0045] In one embodiment, referring to Figure 1 , Figure 1This is a flow chart of the first embodiment of the control method for electric vehicle full-charge ramping in this application. Figure 1 As shown in the figure, the control method of electric vehicle full-charge sliding slope includes:

[0046] Step S10: determining whether the vehicle is in a sliding slope state according to the current gear information of the vehicle and the direction of the motor speed;

[0047] Exemplarily, the gear information of the current vehicle and the direction of the motor speed are obtained. If the gear information of the current vehicle obtained is a preset gear, and the direction of the motor speed is a preset direction, it is determined that the vehicle is in a rolling downhill state. If the gear information obtained is a preset gear, and the direction of the motor speed is not a preset direction, it is determined that the vehicle is not in a rolling downhill state; if the gear information obtained is not a preset gear, and the direction of the motor speed is a preset direction, it is determined that the vehicle is not in a rolling downhill state. For example, when the gear information of the vehicle obtained is a forward gear, and the direction of the motor speed is downward, it is determined that the vehicle is in a rolling downhill state.

[0048] Specifically, the method of determining whether the vehicle is in a rolling downhill state based on obtaining the gear information of the current vehicle and the direction of the motor speed includes: obtaining the gear information of the current vehicle and the direction of the motor speed; obtaining the direction corresponding to the gear information of the current vehicle through the gear information of the current vehicle; determining whether the vehicle is in a rolling downhill state by judging whether the direction corresponding to the gear information is consistent with the direction of the motor speed; if the direction corresponding to the gear information is inconsistent with the direction of the motor speed, determining that the vehicle is in a rolling downhill state.

[0049] Exemplarily, the gear information of the current vehicle and the direction of the motor speed are obtained. If the gear information of the current vehicle is a forward gear, the direction corresponding to the gear information of the current vehicle is obtained as the forward direction; if the gear information of the current vehicle is a reverse gear, the direction corresponding to the gear information of the current vehicle is obtained as the backward direction. It is determined whether the direction corresponding to the gear information of the current vehicle is consistent with the direction of the motor speed, and whether the vehicle is in a sliding state; if the direction corresponding to the gear information is inconsistent with the direction of the motor speed, it is determined that the vehicle is in a sliding state. For example, if the direction corresponding to the gear information is the forward direction and the direction of the motor speed is backward, it is determined that the vehicle is in a sliding state.

[0050] Step S20: if it is determined that the vehicle is in a rolling downhill state, determining whether the battery pack is fully charged according to the SOC of the battery pack of the vehicle and the power value of the available recharging capacity of the battery pack;

[0051] Exemplarily, if it is determined that the vehicle is in a state of sliding down a slope, the battery pack SOC and the available recharge capacity power value of the battery pack are obtained, and whether the battery pack is fully charged is determined based on the obtained battery pack SOC and the available recharge capacity power value of the battery pack. For example, the battery pack SOC and the available recharge capacity power value of the battery pack are obtained; the obtained battery pack SOC is compared with the preset SOC, and the obtained battery pack available recharge capacity power value is compared with the preset power value. If the battery pack SOC is greater than or equal to 99% of the preset SOC, and the battery pack available recharge capacity power value is less than or equal to the preset power value of 2000W, it is determined that the battery pack is fully charged.

[0052] Step S30: if it is determined that the battery pack is in a fully charged state, activating a full-charge ramp strategy, wherein the full-charge ramp strategy includes sending a stall request to the first motor and sending a negative torque to the second motor;

[0053] Exemplarily, if it is determined that the battery pack is in a fully charged state, the full-charge hill-climbing strategy is activated. The full-charge hill-climbing strategy is to send a stall request to the first motor, control the first motor by the stall power carried in the stall request, and the first motor operates according to the stall power, thereby consuming the power of the battery pack and making the battery pack not in a fully charged state. The second motor sends a negative torque to control the second motor to operate based on the negative torque to charge the battery pack and prevent the vehicle from rolling down the hill.

[0054] Step S40: Controlling the first motor and the second motor according to the activated full-charge rolling downhill strategy to prevent the vehicle from rolling down the hill.

[0055] Exemplarily, the vehicle controller sends a stall request to the first motor based on the full-charge rolling strategy, and controls the first motor to work based on the stall power carried by the stall request to consume the power of the battery pack; the vehicle controller sends a negative torque to the second motor based on the full-charge strategy to control the second motor to work based on the negative torque to charge the battery pack and prevent the vehicle from rolling. The stall power is the same as the power corresponding to the negative torque. For example, if the stall power is 3000W, the power generated by the negative torque is also 3000W. The purpose is to coordinate the power of the two motors to ensure that it does not exceed the recharging capacity limit of the high-voltage network.

[0056] In this embodiment, whether the vehicle is in a rolling hill state is determined by obtaining the gear information of the current vehicle and the direction of the motor speed; if it is determined that the vehicle is in a rolling hill state, whether the battery pack is fully charged is determined by obtaining the battery pack SOC of the vehicle and the power value of the available recharging capacity of the battery pack; if it is determined that the battery pack is fully charged, the full-charge rolling hill strategy is activated, and the full-charge rolling hill strategy includes sending a stall request to the first motor and sending a negative torque to the second motor; the first motor and the second motor are controlled according to the activated full-charge rolling hill strategy to prevent the vehicle from rolling down the hill, which solves the technical problems in the related art that the total battery discharge space is reduced when the vehicle is fully charged and the electric range of the whole vehicle is affected, the additional cost is increased, and the rolling hill condition response is insufficient.

[0057] In one embodiment, referring to Figure 2 , Figure 2 This is a flow chart of the second embodiment of the control method for electric vehicle full-charge slope sliding in this application. Figure 2 As shown in the figure, the control method of electric vehicle full-charge sliding slope includes:

[0058] Step S11: determining whether the vehicle is in a sliding slope state according to the current gear information of the vehicle and the direction of the motor speed;

[0059] Exemplarily, the gear information of the current vehicle and the direction of the motor speed are obtained. If the gear information of the current vehicle obtained is a preset gear, and the direction of the motor speed is a preset direction, it is determined that the vehicle is in a rolling downhill state. If the gear information obtained is a preset gear, and the direction of the motor speed is not a preset direction, it is determined that the vehicle is not in a rolling downhill state; if the gear information obtained is not a preset gear, and the direction of the motor speed is a preset direction, it is determined that the vehicle is not in a rolling downhill state. For example, when the gear information of the vehicle obtained is a forward gear, and the direction of the motor speed is downward, it is determined that the vehicle is in a rolling downhill state.

[0060] Specifically, the method of determining whether the vehicle is in a rolling downhill state based on obtaining the gear information of the current vehicle and the direction of the motor speed includes: obtaining the gear information of the current vehicle and the direction of the motor speed; obtaining the direction corresponding to the gear information of the current vehicle through the gear information of the current vehicle; determining whether the vehicle is in a rolling downhill state by judging whether the direction corresponding to the gear information is consistent with the direction of the motor speed; if the direction corresponding to the gear information is inconsistent with the direction of the motor speed, determining that the vehicle is in a rolling downhill state.

[0061] Exemplarily, the gear information of the current vehicle and the direction of the motor speed are obtained. If the gear information of the current vehicle is a forward gear, the direction corresponding to the gear information of the current vehicle is obtained as the forward direction; if the gear information of the current vehicle is a reverse gear, the direction corresponding to the gear information of the current vehicle is obtained as the backward direction. It is determined whether the direction corresponding to the gear information of the current vehicle is consistent with the direction of the motor speed, and whether the vehicle is in a sliding state; if the direction corresponding to the gear information is inconsistent with the direction of the motor speed, it is determined that the vehicle is in a sliding state. For example, if the direction corresponding to the gear information is the forward direction and the direction of the motor speed is backward, it is determined that the vehicle is in a sliding state.

[0062] Step S12: if it is determined that the vehicle is in a rolling downhill state, determining whether the battery pack is fully charged according to the SOC of the battery pack of the vehicle and the power value of the available recharging capacity of the battery pack;

[0063] Exemplarily, if it is determined that the vehicle is in a state of sliding down a slope, the battery pack SOC and the available recharge capacity power value of the battery pack are obtained, and whether the battery pack is fully charged is determined based on the obtained battery pack SOC and the available recharge capacity power value of the battery pack. For example, the battery pack SOC and the available recharge capacity power value of the battery pack are obtained; the obtained battery pack SOC is compared with the preset SOC, and the obtained battery pack available recharge capacity power value is compared with the preset power value. If the battery pack SOC is greater than or equal to 99% of the preset SOC, and the battery pack available recharge capacity power value is less than or equal to the preset power value of 2000W, it is determined that the battery pack is fully charged.

[0064] Step S13: if it is determined that the battery pack is in a fully charged state, activating a full-charge ramp strategy, wherein the full-charge ramp strategy includes sending a stall request to the first motor and sending a negative torque to the second motor;

[0065] Exemplarily, if it is determined that the battery pack is in a fully charged state, the full-charge hill-climbing strategy is activated. The full-charge hill-climbing strategy is to send a stall request to the first motor, control the first motor by the stall power carried in the stall request, and the first motor operates according to the stall power, thereby consuming the power of the battery pack and making the battery pack not in a fully charged state. The second motor sends a negative torque to control the second motor to operate based on the negative torque to charge the battery pack and prevent the vehicle from rolling down the hill.

[0066] Step S14: Controlling the first motor and the second motor according to the activated full-charge rolling downhill strategy to prevent the vehicle from rolling down the hill.

[0067] Exemplarily, the vehicle controller sends a stall request to the first motor based on the full-charge rolling strategy, and controls the first motor to work based on the stall power carried by the stall request to consume the power of the battery pack; the vehicle controller sends a negative torque to the second motor based on the full-charge strategy to control the second motor to work based on the negative torque to charge the battery pack and prevent the vehicle from rolling. The stall power is the same as the power corresponding to the negative torque. For example, if the stall power is 3000W, the power generated by the negative torque is also 3000W. The purpose is to coordinate the power of the two motors to ensure that it does not exceed the recharging capacity limit of the high-voltage network.

[0068] Step S15: obtaining the gear information of the vehicle after rolling down the slope and the direction of the speed of the speed motor;

[0069] Step S16: determining whether the vehicle is in a rolling downhill state according to the gear information of the vehicle after rolling downhill and the direction of the speed motor speed;

[0070] Step S17: If it is determined that the vehicle is not in a rolling hill state, then the full-charge rolling hill strategy is exited.

[0071] Exemplarily, the gear information of the vehicle after rolling down the slope and the direction of the speed motor speed are used to determine whether the vehicle is in a rolling down the slope state. For example, if the gear information of the vehicle after rolling down the slope is a forward gear, the direction of the forward gear is forward, and the direction of the speed motor speed of the vehicle after rolling down the slope is also forward, it is determined that the vehicle is not in a rolling down the slope state, and the vehicle exits the full-power rolling down the slope strategy.

[0072] Specifically, after preventing the vehicle from rolling down the slope, the method further includes: obtaining a time duration for preventing the vehicle from rolling down the slope; if the time duration for preventing the vehicle from rolling down the slope is greater than or equal to a preset time duration, exiting the full-power rolling down the slope strategy, and using electronic parking to prevent the vehicle from rolling down the slope.

[0073] Exemplarily, the time length for preventing the vehicle from rolling down the slope is obtained, and the obtained time length for preventing the vehicle from rolling down the slope is compared with the preset time length. If the time length for preventing the vehicle from rolling down the slope is greater than or equal to the preset time length, the full-power rolling down the slope strategy is exited, and electronic parking is used to prevent the vehicle from rolling down the slope.

[0074] In this embodiment, whether the vehicle is in a rolling hill state is determined by obtaining the gear information of the current vehicle and the direction of the motor speed; if it is determined that the vehicle is in a rolling hill state, whether the battery pack is in a fully charged state is determined by obtaining the battery pack SOC of the vehicle and the power value of the available recharging capacity of the battery pack; if it is determined that the battery pack is in a fully charged state, the full-charge rolling hill strategy is activated, and the full-charge rolling hill strategy includes sending a stall request to the first motor and sending a negative torque to the second motor; the first motor and the second motor are controlled according to the activated full-charge rolling hill strategy to prevent the vehicle from rolling down the hill, and when the vehicle is not in a fully-charged rolling hill state, the full-charge rolling hill strategy is exited to avoid the vehicle being in the full-charged rolling hill strategy for a long time, which causes motor overload.

[0075] In a second aspect, an embodiment of the present application also provides a control device for a fully-charged electric vehicle rolling downhill.

[0076] In one embodiment, referring to Figure 3 , Figure 3 This is a functional module diagram of an embodiment of a control device for electric vehicles with full power rolling downhill. Figure 3 As shown, the control device for electric vehicle with full charge rolling downhill includes:

[0077] The first determination module 10 is used to determine whether the vehicle is in a sliding state according to the current gear information of the vehicle and the direction of the motor speed;

[0078] A second determination module 20 is used to determine whether the battery pack is fully charged according to the SOC of the battery pack of the vehicle and the available recharging capacity power value of the battery pack if it is determined that the vehicle is in a rolling slope state;

[0079] An activation strategy module 30 is used to activate a full-charge ramp strategy if it is determined that the battery pack is in a fully-charged state, wherein the full-charge ramp strategy includes sending a stall request to the first motor and sending a negative torque to the second motor;

[0080] The control module 40 is used to control the first motor and the second motor according to the activated full-charge rolling downhill strategy to prevent the vehicle from rolling down the hill.

[0081] Furthermore, in one embodiment, the first determining module 10 is used to:

[0082] Get the current vehicle gear information and motor speed direction;

[0083] Obtaining the direction corresponding to the gear information of the current vehicle through the gear information of the current vehicle;

[0084] Determining whether the vehicle is in a sliding slope state by judging whether the direction corresponding to the gear information is consistent with the direction of the motor speed;

[0085] If the direction corresponding to the gear information is inconsistent with the direction of the motor speed, it is determined that the vehicle is in a sliding downhill state.

[0086] Furthermore, in one embodiment, the second determining module 20 is used to:

[0087] Obtain the battery pack SOC and the available recharging power value of the battery pack;

[0088] If the SOC of the battery pack is greater than or equal to the preset SOC, and the available recharging power value of the battery pack is less than or equal to the preset power value, it is determined that the battery pack is in a fully charged state.

[0089] Furthermore, in one embodiment, the control module 40 is used to:

[0090] The vehicle controller includes sending a stall request to the first motor based on the full-charge ramp strategy, and controlling the first motor to work based on the stall power carried by the stall request to consume the power of the battery pack;

[0091] The vehicle controller includes sending a negative torque to the second motor based on the full-charge strategy to control the second motor to work based on the negative torque to charge the battery pack and prevent the vehicle from rolling down the slope.

[0092] Furthermore, in one embodiment, the control device for rolling downhill when the electric vehicle is fully charged also includes a new module for:

[0093] Obtaining the gear position information of the vehicle after sliding down the slope and the direction of the speed of the speed motor;

[0094] Determining whether the vehicle is in a sliding slope state according to the gear information of the vehicle after sliding slope and the direction of the speed of the speed motor;

[0095] If it is determined that the vehicle is not in a rolling hill state, the full-charge rolling hill strategy is exited.

[0096] Furthermore, in one embodiment, the control device for rolling downhill when the electric vehicle is fully charged also includes a new module for:

[0097] Get the duration of preventing the vehicle from sliding down the slope;

[0098] If the duration for preventing the vehicle from rolling down the slope is greater than or equal to the preset duration, the full-power rolling down the slope strategy is exited, and the electronic parking method is used to prevent the vehicle from rolling down the slope.

[0099] Furthermore, in one embodiment, the stall power is the same as the power corresponding to the negative torque.

[0100] Among them, the functional implementation of each module in the above-mentioned electric vehicle fully charged ramp control device corresponds to the various steps in the above-mentioned electric vehicle fully charged ramp control method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0101] In a third aspect, an embodiment of the present application provides a control device for a fully charged electric vehicle to coast down a hill. The control device for a fully charged electric vehicle to coast down a hill may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0102] Reference Figure 4 , Figure 4 The hardware structure diagram of the control device for electric vehicle full-charge rolling slope involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the control device for electric vehicle full-charge rolling slope may include a processor, a memory, a communication interface and a communication bus.

[0103] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0104] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to interconnect the devices inside the control device of electric vehicle full charge rolling, and the interface used to interconnect the control device of electric vehicle full charge rolling with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0105] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0106] The processor may be a general-purpose processor, and the general-purpose processor may call the control program of the electric vehicle fully charged and rolled down the slope stored in the memory, and execute the control method of the electric vehicle fully charged and rolled down the slope provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). Among them, the method executed when the control program of the electric vehicle fully charged and rolled down the slope is called may refer to the various embodiments of the control method of the electric vehicle fully charged and rolled down the slope of the present application, and will not be repeated here.

[0107] Those skilled in the art will understand that Figure 4 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0108] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0109] The computer-readable storage medium of the present application stores a control program for an electric vehicle to coast down a hill when fully charged, wherein when the control program for an electric vehicle to coast down a hill when fully charged is executed by a processor, the steps of the control method for an electric vehicle to coast down a hill when fully charged as described above are implemented.

[0110] Among them, the method implemented when the control program of the electric vehicle's fully charged ramp is executed can refer to the various embodiments of the control method of the electric vehicle's fully charged ramp in the present application, and will not be repeated here.

[0111] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0112] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0113] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0114] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0115] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0116] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0117] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A control method for electric vehicle sliding downhill when fully charged, characterized in that: The control method for the electric vehicle to slide downhill at full charge comprises: Determine whether the vehicle is in a sliding slope state by obtaining the current vehicle gear information and the direction of the motor speed; If it is determined that the vehicle is in a sliding slope state, determining whether the battery pack is fully charged according to obtaining the battery pack SOC of the vehicle and the available recharging power value of the battery pack; If it is determined that the battery pack is in a fully charged state, activating a full-charge ramp strategy, wherein the full-charge ramp strategy includes sending a stall request to the first motor and sending a negative torque to the second motor; The first motor and the second motor are controlled according to the full-charge rolling downhill strategy to prevent the vehicle from rolling down the hill.

2. The control method for electric vehicle full-charge slope sliding as claimed in claim 1, characterized in that: The step of determining whether the vehicle is in a sliding slope state according to obtaining the current gear position information of the vehicle and the direction of the motor speed includes: Get the current vehicle gear information and motor speed direction; Obtaining the direction corresponding to the gear information of the current vehicle through the gear information of the current vehicle; Determining whether the vehicle is in a sliding slope state by judging whether the direction corresponding to the gear information is consistent with the direction of the motor speed; If the direction corresponding to the gear information is inconsistent with the direction of the motor speed, it is determined that the vehicle is in a sliding downhill state.

3. The control method for electric vehicle full-charge slope sliding as claimed in claim 1, characterized in that: The determining whether the battery pack is in a fully charged state according to obtaining the battery pack SOC of the vehicle and the available recharging capacity power value of the battery pack includes: Obtain the battery pack SOC and the available recharging power value of the battery pack; If the SOC of the battery pack is greater than or equal to the preset SOC, and the available recharging power value of the battery pack is less than or equal to the preset power value, it is determined that the battery pack is in a fully charged state.

4. The control method for electric vehicle full-charge slope sliding as claimed in claim 1, characterized in that: The controlling the first motor and the second motor according to the full-power rolling downhill strategy to prevent the vehicle from rolling downhill includes: Sending a stall request to the first motor based on the full-charge ramp strategy through the vehicle controller, and controlling the first motor to work based on the stall power carried by the stall request to consume the power of the battery pack; The vehicle controller sends negative torque to the second motor based on the full-charge strategy to control the second motor to work based on the negative torque, so as to charge the battery pack and prevent the vehicle from rolling down the slope.

5. The control method for electric vehicle full-charge slope sliding as claimed in claim 1, characterized in that: After preventing the vehicle from sliding down the slope, the method further comprises: Obtaining the gear position information of the vehicle after sliding down the slope and the direction of the speed of the speed motor; Determining whether the vehicle is in a sliding slope state according to the gear information of the vehicle after sliding slope and the direction of the speed of the speed motor; If it is determined that the vehicle is not in a rolling hill state, the full-charge rolling hill strategy is exited.

6. The control method for electric vehicle full-charge slope sliding as claimed in claim 1, characterized in that: After preventing the vehicle from sliding down the slope, the method further comprises: Get the duration of preventing the vehicle from sliding down the slope; If the duration for preventing the vehicle from rolling down the slope is greater than or equal to the preset duration, the full-power rolling down the slope strategy is exited, and the electronic parking method is used to prevent the vehicle from rolling down the slope.

7. The control method for electric vehicle full-charge slope sliding as claimed in claim 4, characterized in that: The stall power is the same as the power corresponding to the negative torque.

8. A control device for electric vehicles sliding downhill when fully charged, characterized in that: The control device for the electric vehicle to slide downhill when fully charged comprises: A first determination module is used to determine whether the vehicle is in a sliding slope state according to the current gear information of the vehicle and the direction of the motor speed; A second determination module is used to determine whether the battery pack is fully charged according to the SOC of the battery pack of the vehicle and the power value of the available recharging capacity of the battery pack if it is determined that the vehicle is in a sliding state; an activation strategy module, configured to activate a full-charge ramp strategy if it is determined that the battery pack is in a fully-charged state, wherein the full-charge ramp strategy includes sending a stall request to the first motor and sending a negative torque to the second motor; The control module is used to control the first motor and the second motor according to the activated full-charge rolling downhill strategy to prevent the vehicle from rolling down the hill.

9. A control device for electric vehicles to slide downhill when fully charged, characterized in that: The control device for the electric vehicle's full-charge ramp includes a processor, a memory, and a control program for the electric vehicle's full-charge ramp stored in the memory and executable by the processor. When the control program for the electric vehicle's full-charge ramp is executed by the processor, the steps of the control method for the electric vehicle's full-charge ramp as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a control program for the electric vehicle to coast downhill when fully charged, wherein when the control program for the electric vehicle to coast downhill when fully charged is executed by the processor, the steps of the control method for the electric vehicle to coast downhill when fully charged as claimed in any one of claims 1 to 7 are implemented.

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