Automobile braking control method, device, electronic equipment and automobile

Abstract

The embodiments of the present invention provide a vehicle braking control method, device, electronic device and vehicle, and relate to the technical field of new energy vehicles. The method comprises: obtaining the brake disc temperature of each brake disc of the vehicle in real time, and determining the target brake disc temperature with the highest temperature value from each brake disc temperature. Based on the target brake disc temperature, a target brake disc temperature interval is determined from a plurality of brake disc temperature intervals. Among them, each brake disc temperature interval is arranged in sequence according to the temperature size, and each brake disc temperature interval corresponds to a brake disc control strategy. Receive the target braking displacement sent by the user, and convert the braking displacement into a target braking deceleration. Brake the vehicle based on the brake disc control strategy corresponding to the target brake disc temperature interval to achieve the target braking deceleration. The present invention can effectively avoid the situation where the brake disc temperature rises too fast, resulting in brake thermal decay or boiling and vaporization of the brake fluid, and improve the stability of the vehicle's braking performance.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a vehicle braking control method, device, electronic equipment and a vehicle. Background Art

[0002] When the vehicle is driven vigorously on a racetrack or mountain road, the driver needs to brake more frequently due to the complex road conditions and the need for rapid acceleration / deceleration. At this time, the temperature of the vehicle's brake disc will rise rapidly, leading to brake thermal decay or boiling and vaporization of the brake fluid, indirectly causing the risk of deterioration of braking performance. Summary of the invention

[0003] The objects of the present invention include, for example, providing a vehicle braking control method, device, electronic equipment and vehicle, which can at least partially solve the above-mentioned technical problems.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, an embodiment of the present invention provides a method for controlling vehicle braking, the method comprising:

[0006] Acquire the brake disc temperature of each brake disc of the vehicle in real time, and determine the target brake disc temperature with the highest temperature value from the brake disc temperatures;

[0007] Based on the target brake disc temperature, determining a target brake disc temperature interval from a plurality of brake disc temperature intervals; wherein the brake disc temperature intervals are arranged in order according to the temperature size, and each brake disc temperature interval corresponds to a brake disc control strategy;

[0008] receiving a target braking displacement sent by a user, and converting the braking displacement into a target braking deceleration;

[0009] The vehicle is braked based on a brake disc control strategy corresponding to the target brake disc temperature range to achieve the target braking deceleration.

[0010] Optionally, the brake disc temperature interval includes a first temperature interval, and the braking of the vehicle based on the brake disc control strategy corresponding to the target brake disc temperature interval includes:

[0011] If the target brake disc temperature interval is the first temperature interval, determining the magnitude relationship between the target braking deceleration and the first deceleration threshold;

[0012] If the target braking deceleration is less than or equal to the first deceleration threshold, the vehicle is braked only by electric braking energy recovery;

[0013] If the target braking deceleration is greater than the first deceleration threshold, calculating a first deceleration difference between the target braking deceleration and the first deceleration threshold, and dividing the target braking deceleration into a first deceleration threshold portion and a first deceleration difference portion;

[0014] The electric braking energy recovery method is used to perform braking of the first deceleration threshold part, and the hydraulic braking method is used to perform braking of the first deceleration difference part.

[0015] Optionally, the brake disc temperature range further includes a second temperature range, the second temperature range is greater than the first temperature range, and the braking of the vehicle based on the brake disc control strategy corresponding to the target brake disc temperature range further includes:

[0016] If the target brake disc temperature interval is the second temperature interval, recording the change trend of the target brake disc temperature to obtain the temperature growth rate of the target brake disc temperature;

[0017] determining a second deceleration threshold in real time according to the temperature increase rate, the first deceleration threshold, the maximum value of the second temperature range, and the target brake disc temperature;

[0018] determining whether the target braking deceleration is greater than a second deceleration threshold value determined when obtaining the target braking deceleration;

[0019] If the target braking deceleration is less than or equal to the second deceleration threshold, the vehicle is braked only by electric braking energy recovery;

[0020] If the target braking deceleration is greater than the second deceleration threshold, calculating a second deceleration difference between the target braking deceleration and the second deceleration threshold, and dividing the target braking deceleration into a second deceleration threshold portion and a second deceleration difference portion;

[0021] The electric braking energy recovery method is used to perform braking of the second deceleration threshold portion, and the hydraulic braking method is used to perform braking of the second deceleration difference portion.

[0022] Optionally, determining the second deceleration threshold in real time according to the temperature increase rate, the first deceleration threshold, the maximum value of the second temperature interval and the target brake disc temperature includes:

[0023] calculating a temperature difference between a maximum value of the second temperature interval and a target brake disc temperature;

[0024] determining a temperature rise time for the target brake disc temperature to reach the maximum value according to the temperature difference and the temperature increase rate;

[0025] Obtaining the maximum deceleration that can be obtained by the electric braking energy recovery method;

[0026] calculating a third deceleration difference between the maximum deceleration and the first deceleration threshold;

[0027] The second deceleration threshold is determined in real time according to the third deceleration difference and the temperature rise time.

[0028] Optionally, the brake disc temperature interval further includes a third temperature interval, the third temperature interval is greater than the second temperature interval, and the braking of the vehicle based on the brake disc control strategy corresponding to the target brake disc temperature interval further includes:

[0029] If the target brake disc temperature range is the third temperature range, obtaining a maximum deceleration that can be obtained by the electric brake energy recovery method, and using the maximum deceleration as a third deceleration threshold;

[0030] determining whether the target braking deceleration is greater than the third deceleration threshold;

[0031] If the target braking deceleration is less than or equal to the third deceleration threshold, the vehicle is braked only by electric braking energy recovery;

[0032] If the target braking deceleration is greater than the third deceleration threshold, calculating a fourth deceleration difference between the target braking deceleration and the third deceleration threshold, and dividing the target braking deceleration into a third deceleration threshold portion and a fourth deceleration difference portion;

[0033] The electric braking energy recovery method is used to perform braking of the third deceleration threshold portion, and the hydraulic braking method is used to perform braking of half of the fourth deceleration difference portion.

[0034] Optionally, the method further comprises:

[0035] If the target brake disc temperature interval is the third temperature interval, a fault signal is generated, and based on the fault signal, a brake system fault light on the vehicle dashboard is controlled to light up to remind the user that a brake system fault has occurred.

[0036] Optionally, the obtaining of the maximum deceleration that can be obtained by the electric braking energy recovery method includes:

[0037] Respectively obtain the remaining battery capacity, maximum battery charging power, maximum motor power generation and charging efficiency of the vehicle;

[0038] Determine the maximum braking force that can be generated by the electric braking energy recovery method based on the remaining capacity of the battery, the maximum charging power of the battery, the maximum power generation power of the motor and the charging efficiency;

[0039] The maximum braking force is converted to obtain the maximum deceleration.

[0040] In a second aspect, an embodiment of the present invention provides a vehicle brake control device, the vehicle brake control device comprising:

[0041] A target brake disc temperature determination unit, used to obtain the brake disc temperature of each brake disc of the vehicle in real time, and determine the target brake disc temperature with the highest temperature value from the brake disc temperatures;

[0042] a target brake disc temperature interval determination unit, configured to determine a target brake disc temperature interval from a plurality of brake disc temperature intervals based on the target brake disc temperature; wherein the brake disc temperature intervals are arranged in sequence according to the temperature size, and each of the brake disc temperature intervals corresponds to a brake disc control strategy;

[0043] A target braking deceleration conversion unit, configured to receive a target braking displacement sent by a user and convert the braking displacement into a target braking deceleration;

[0044] A brake control unit is used to brake the vehicle based on a brake disc control strategy corresponding to the target brake disc temperature range to achieve the target braking deceleration.

[0045] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above methods when executing the program.

[0046] In a fourth aspect, an embodiment of the present invention provides a car, which implements the steps of any one of the above methods when running.

[0047] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a computer program, and when the computer program is executed, the server where the computer-readable storage medium is located is controlled to implement the steps of any one of the above methods.

[0048] The beneficial effects of the embodiments of the present invention include, for example:

[0049] The target brake disc temperature is determined by obtaining the real-time temperature of each brake disc of the car. The corresponding brake disc control strategy is determined according to the temperature range of the target brake disc temperature to respond to the target braking displacement sent by the user. This avoids the situation where the brake disc temperature rises too quickly, causing brake thermal decay or brake fluid boiling and vaporization. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 A block diagram of an electronic device provided by an embodiment of the present invention;

[0052] Figure 2 A flowchart of a method for controlling vehicle braking provided by an embodiment of the present invention;

[0053] Figure 3 A schematic diagram of a brake disc temperature range provided by an embodiment of the present invention;

[0054] Figure 4 A trend diagram of the deceleration threshold value changing with the target brake disc temperature provided by an embodiment of the present invention;

[0055] Figure 5 An architectural diagram of an automobile brake control device provided in an embodiment of the present invention.

[0056] Icons: 100 - electronic device; 110 - memory; 120 - processor; 130 - communication module; 300 - vehicle brake control device; 301 - target brake disc temperature determination unit; 302 - target brake disc temperature range determination unit; 303 - target brake deceleration conversion unit; 304 - brake control unit. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0060] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0061] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0062] Please refer to Figure 1 , is a block diagram of an electronic device 100 provided by the present application. The electronic device 100 may be a device capable of performing data processing, which is not limited in this embodiment. The electronic device 100 includes a memory 110, a processor 120, and a communication module 130. The memory 110, the processor 120, and the communication module 130. Each component is electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses or signal lines.

[0063] The memory 110 is used to store programs or data. The memory 110 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc.

[0064] The processor 120 is used to read / write data or programs stored in the memory and execute corresponding functions.

[0065] The communication module 130 is used to establish a communication connection between the server and other communication terminals through the network, and to send and receive data through the network.

[0066] It should be understood that Figure 1 The structure shown is only a schematic diagram of the structure of the electronic device 100. The electronic device 100 may also include Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown. Figure 1The components shown in the figure can be implemented by hardware, software or a combination thereof. The electronic device 100 can be arranged in other devices or as an independent device.

[0067] Corresponding to the electronic device 100, the embodiment of the present invention provides a vehicle braking control method, the method comprising: Figure 2 The following steps are shown:

[0068] Step S110: acquiring the brake disc temperature of each brake disc of the vehicle in real time, and determining a target brake disc temperature with the highest temperature value from the brake disc temperatures.

[0069] Step S120: Based on the target brake disc temperature, determine a target brake disc temperature interval from a plurality of brake disc temperature intervals, wherein the brake disc temperature intervals are arranged in order according to the temperature size, and each brake disc temperature interval corresponds to a brake disc control strategy.

[0070] Step S130: receiving the target braking displacement sent by the user, and converting the braking displacement into a target braking deceleration.

[0071] Step S140: Braking the vehicle based on a brake disc control strategy corresponding to the target brake disc temperature range to achieve the target braking deceleration.

[0072] In step S110, the brake disc temperatures of each brake disc of the vehicle are acquired in real time, and a target brake disc temperature with the highest temperature value is determined from the brake disc temperatures.

[0073] When the car is driving, the temperature of the brake discs of the four wheels will rise after the driver brakes. However, due to different braking methods and environmental factors, the temperatures of the four brake discs are not consistent. When the car is running, the temperature of the four brake discs (i.e., brake disc temperature) can be obtained in real time through sensors or temperature estimation models, and the brake disc temperature with the highest temperature value can be selected from the four brake disc temperatures as the target brake disc temperature.

[0074] In step S120, based on the target brake disc temperature, a target brake disc temperature interval is determined from a plurality of brake disc temperature intervals; wherein the brake disc temperature intervals are arranged in sequence according to the temperature size, and each brake disc temperature interval corresponds to a brake disc control strategy.

[0075] When the brake disc temperature is different, different braking methods can be adopted to make full use of other brake discs with relatively low temperatures and avoid using the brake disc with the highest temperature, so as to achieve the purpose of balancing the brake disc temperature and improving the stability of braking performance. After determining the target brake disc temperature, it is possible to further confirm which preset brake disc temperature range the target brake disc temperature is in, and use the brake disc temperature range as the target brake disc temperature range. Different brake disc control strategies are set for each brake disc temperature range. When the target brake disc temperature range is determined, the brake disc control strategy corresponding to the target brake disc temperature range is used for braking.

[0076] In step S130, a target braking displacement sent by a user is received, and the braking displacement is converted into a target braking deceleration.

[0077] Every time the driver steps on the brake, it can be considered that a target braking displacement is sent to the controller, that is, the travel of the brake pedal caused by being stepped on. After receiving the target braking displacement, the controller can convert the target braking displacement into the required braking force by looking up a table, and then convert the braking force into the target braking deceleration, that is, the reverse acceleration value.

[0078] In step S140, the vehicle is braked based on a brake disc control strategy corresponding to the target brake disc temperature range to achieve the target braking deceleration.

[0079] The braking methods of new energy vehicles are generally electric brake energy recovery and hydraulic brake. The reasonable combination of the two can not only save more electricity when the car is driving, but also ensure the stability of the braking performance. After obtaining the target brake deceleration, the car can be braked according to the brake disc control strategy corresponding to the target brake disc temperature range where the current target brake disc temperature is located. For example, if the brake disc control strategy corresponding to the target brake disc temperature range where the target brake disc temperature is located is to generate half of the braking force through the electric brake energy recovery method and the hydraulic braking method respectively, the controller generates half of the target brake deceleration through the electric brake energy recovery method; and generates half of the target brake deceleration through the hydraulic braking method to complete the vehicle braking.

[0080] Optionally, the brake disc temperature interval includes a first temperature interval, and the braking of the vehicle based on the brake disc control strategy corresponding to the target brake disc temperature interval includes:

[0081] If the target brake disc temperature interval is the first temperature interval, the magnitude relationship between the target braking deceleration and the first deceleration threshold is determined.

[0082] If the target braking deceleration is less than or equal to the first deceleration threshold, the vehicle is braked only by electric braking energy recovery.

[0083] If the target braking deceleration is greater than the first deceleration threshold, a first deceleration difference between the target braking deceleration and the first deceleration threshold is calculated, and the target braking deceleration is divided into a first deceleration threshold portion and a first deceleration difference portion.

[0084] The electric braking energy recovery method is used to perform braking of the first deceleration threshold part, and the hydraulic braking method is used to perform braking of the first deceleration difference part.

[0085] In an optional implementation, a first temperature range may be set, such as a target brake disc temperature of less than or equal to 200° C. When the determined target brake disc temperature range is the first temperature range, the target braking deceleration is compared with a preset first deceleration threshold (such as 0.3 g).

[0086] If the target braking deceleration is less than or equal to the first deceleration threshold, it is considered that the braking demand is not high and only the electric braking energy recovery method is used to brake the vehicle; if the target braking deceleration is greater than the first deceleration threshold, the electric braking energy recovery method is used to execute the braking part of the target braking deceleration that is the first deceleration threshold, and the remaining braking part (i.e., the first deceleration difference part) is executed by hydraulic braking.

[0087] Optionally, the brake disc temperature range further includes a second temperature range, the second temperature range is greater than the first temperature range, and the braking of the vehicle based on the brake disc control strategy corresponding to the target brake disc temperature range further includes:

[0088] If the target brake disc temperature interval is the second temperature interval, the change trend of the target brake disc temperature is recorded to obtain the temperature growth rate of the target brake disc temperature.

[0089] A second deceleration threshold is determined in real time according to the temperature increase rate, the first deceleration threshold, the maximum value of the second temperature interval, and the target brake disc temperature.

[0090] It is determined whether the target braking deceleration is greater than a second deceleration threshold value determined when the target braking deceleration is obtained.

[0091] If the target braking deceleration is less than or equal to the second deceleration threshold, the vehicle is braked only by electric braking energy recovery.

[0092] If the target braking deceleration is greater than the second deceleration threshold, a second deceleration difference between the target braking deceleration and the second deceleration threshold is calculated, and the target braking deceleration is divided into a second deceleration threshold portion and a second deceleration difference portion.

[0093] The electric braking energy recovery method is used to perform braking of the second deceleration threshold portion, and the hydraulic braking method is used to perform braking of the second deceleration difference portion.

[0094] In addition to the first temperature interval, a second temperature interval can also be set. The relationship between the first temperature interval and the second temperature interval is as follows: Figure 3 As shown, the maximum value of the first temperature interval is the target brake disc temperature. For example, the first temperature interval is (0°C, 200°C], and the second temperature interval is (200°C, 300°C].

[0095] The controller can record the change trend of the target brake disc temperature with the highest temperature according to the brake disc temperature fitting curve obtained in real time, and then obtain the temperature growth rate of the target brake disc temperature. When the target brake disc temperature interval is determined to be the second temperature interval, a second deceleration threshold that changes with the change of the temperature growth rate can be determined in real time according to the temperature growth rate, the first deceleration threshold, the maximum value of the second temperature interval and the target brake disc temperature.

[0096] After determining the second deceleration threshold, a strategy similar to the brake disc control strategy corresponding to the first temperature range can be used to brake the vehicle. That is, when the target braking deceleration is less than or equal to the second deceleration threshold, only the electric braking energy recovery method is used to brake the vehicle; when the target braking deceleration is greater than the second deceleration threshold, the second deceleration difference between the target braking deceleration and the second deceleration threshold is calculated, and the target braking deceleration is divided into the second deceleration threshold part and the second deceleration difference part, and the electric braking energy recovery method is used to perform braking of the second deceleration threshold part, and the hydraulic braking method is used to perform braking of the second deceleration difference part.

[0097] Different from the brake disc control strategy corresponding to the first temperature range, in the brake disc control strategy corresponding to the second temperature range, the second deceleration threshold is always greater than the first deceleration threshold and is in a real-time adjustment state, which leads to different proportions of braking by electric braking energy recovery and hydraulic braking.

[0098] Optionally, determining the second deceleration threshold in real time according to the temperature increase rate, the first deceleration threshold, the maximum value of the second temperature interval and the target brake disc temperature includes:

[0099] A temperature difference between a maximum value of the second temperature interval and a target brake disc temperature is calculated.

[0100] The temperature rise time for the target brake disc temperature to reach the maximum value is determined according to the temperature difference and the temperature increase rate.

[0101] The maximum deceleration that can be obtained by the electric braking energy recovery method is obtained.

[0102] A third deceleration difference between the maximum deceleration and the first deceleration threshold is calculated.

[0103] The second deceleration threshold is determined in real time according to the third deceleration difference and the temperature rise time.

[0104] As an optional implementation, when determining the second deceleration threshold, the temperature difference between the maximum value of the second temperature interval and the target brake disc temperature can be calculated first, and the time (i.e., the temperature rise time) for the target brake disc temperature to reach the maximum value of the second temperature interval can be determined according to the speed-time formula. The maximum braking force that can be obtained by the electric brake energy recovery method is obtained through the state information of the vehicle battery, and it is converted into the maximum deceleration. The maximum deceleration is subtracted from the first deceleration threshold, and the third deceleration difference obtained is divided by the temperature rise time, so that the current second deceleration threshold can be determined.

[0105] For example, if the temperature increase rate is K and the first deceleration threshold is a 1 The maximum value of the second temperature interval is T2 max , target brake disc temperature T0, maximum deceleration is a max , then the second deceleration threshold a 2 for:

[0106] a 2 =(a max - a 1 ) / (T2 max - T0) / K.

[0107] Optionally, the brake disc temperature interval further includes a third temperature interval, the third temperature interval is greater than the second temperature interval, and the braking of the vehicle based on the brake disc control strategy corresponding to the target brake disc temperature interval further includes:

[0108] If the target brake disc temperature range is the third temperature range, the maximum deceleration that can be obtained by the electric brake energy recovery method is obtained, and the maximum deceleration is used as the third deceleration threshold.

[0109] It is determined whether the target braking deceleration is greater than the third deceleration threshold.

[0110] If the target braking deceleration is less than or equal to the third deceleration threshold, the vehicle is braked only by electric braking energy recovery.

[0111] If the target braking deceleration is greater than the third deceleration threshold, a fourth deceleration difference between the target braking deceleration and the third deceleration threshold is calculated, and the target braking deceleration is divided into a third deceleration threshold portion and a fourth deceleration difference portion.

[0112] The electric braking energy recovery method is used to perform braking of the third deceleration threshold portion, and the hydraulic braking method is used to perform braking of half of the fourth deceleration difference portion.

[0113] like Figure 3 As shown, the third temperature interval can be greater than the second temperature interval, such as (300°C, +∞). When the target brake disc temperature interval is the third temperature interval, it is considered that the target brake disc temperature at this time has exceeded the normal temperature range, and the maximum deceleration that can be obtained by the electric brake energy recovery method can be used as the third deceleration threshold. If the target braking deceleration is less than or equal to the third deceleration threshold, only the electric brake energy recovery method is used to brake the vehicle.

[0114] If the target braking deceleration is greater than the third deceleration threshold, the target brake disc temperature is too high and the electric brake energy recovery braking method may have failed. If hydraulic braking is not used, the vehicle may lose all braking force. Therefore, hydraulic braking can be used to execute half of the target braking deceleration that exceeds the third deceleration threshold (i.e. half of the fourth deceleration difference) to maintain the vehicle's braking force.

[0115] Optionally, the method further includes: if the target brake disc temperature range is a third temperature range, generating a fault signal, and controlling a brake system fault light on a vehicle dashboard to light up based on the fault signal to remind a user that a brake system fault has occurred.

[0116] In addition to the braking method, when the target brake disc temperature range is the third temperature range, a fault signal can also be generated and displayed on the car dashboard to notify the user that a brake system failure has occurred and that corresponding measures need to be taken.

[0117] During the driving process of the car, the trend diagram of the deceleration threshold changing with the target brake disc temperature can be shown as follows Figure 4 As shown, V1 is the first deceleration threshold, V2 is the maximum deceleration (third deceleration threshold), 0~T1 is the first temperature interval, T1~T2 is the second temperature interval, and greater than T2 is the third temperature interval. When the target brake disc temperature is in the first temperature interval, the deceleration threshold remains at the first deceleration threshold; when the target brake disc temperature is in the second temperature interval, the deceleration threshold changes with the temperature increase rate; when the target brake disc temperature is in the third temperature interval, the deceleration threshold is at the third deceleration threshold.

[0118] Optionally, the obtaining of the maximum deceleration that can be obtained by the electric braking energy recovery method includes:

[0119] The remaining battery capacity, maximum battery charging power, maximum motor power generation and charging efficiency of the vehicle are obtained respectively.

[0120] The maximum braking force that can be generated by the electric braking energy recovery method is determined based on the remaining capacity of the battery, the maximum charging power of the battery, the maximum power generation power of the motor, and the charging efficiency. The maximum braking force is converted to obtain the maximum deceleration.

[0121] The remaining capacity of the battery determines the total amount of energy that can be recovered. During the braking energy recovery process, if the maximum charging power of the battery is small, the electric energy generated by the motor may be limited, thus affecting the output of the braking force. The maximum charging power of the battery is a key factor in determining the maximum braking force. The greater the power generated by the motor, the more braking energy can be recovered, and the greater the braking force generated. Although the charging efficiency does not directly determine the size of the braking force, it will affect the actual braking energy that can be recovered, and thus indirectly affect the output of the braking force.

[0122] Therefore, in an optional implementation, the remaining battery capacity (State of Charge, SOC), the maximum battery charging power, the maximum motor power generation power and the charging efficiency can be obtained, and then a comprehensive judgment can be made to estimate the maximum braking force that can be generated by the electric braking energy recovery method, and the maximum braking force can be converted into the maximum deceleration.

[0123] Based on the same inventive concept, Figure 5 As shown, the embodiment of the present invention provides a vehicle brake control device 300, including:

[0124] The target brake disc temperature determining unit 301 is used to obtain the brake disc temperature of each brake disc of the vehicle in real time, and determine the target brake disc temperature with the highest temperature value from the brake disc temperatures.

[0125] The target brake disc temperature interval determination unit 302 is used to determine a target brake disc temperature interval from a plurality of brake disc temperature intervals based on the target brake disc temperature, wherein the brake disc temperature intervals are arranged in sequence according to the temperature size, and each brake disc temperature interval corresponds to a brake disc control strategy.

[0126] The target braking deceleration conversion unit 303 is used to receive the target braking displacement sent by the user and convert the braking displacement into a target braking deceleration.

[0127] The brake control unit 304 is used to brake the vehicle based on a brake disc control strategy corresponding to the target brake disc temperature range to achieve the target braking deceleration.

[0128] Regarding the above-mentioned automobile brake control device 300, the specific functions of each unit therein have been described in detail in the embodiment of the automobile brake control method provided in this specification, and will not be elaborated here.

[0129] Based on the same inventive concept, an embodiment of the present invention specification provides a car, which implements the steps of any of the above methods when running.

[0130] Based on the same inventive concept, an embodiment of the present invention specification provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of any method of the above-mentioned vehicle braking control method are implemented.

[0131] The present invention has at least the following beneficial effects:

[0132] The target brake disc temperature is determined by obtaining the real-time temperature of each brake disc of the car. The corresponding brake disc control strategy is determined according to the temperature range of the target brake disc temperature to respond to the target brake displacement sent by the user. This avoids the situation where the brake disc temperature rises too quickly, causing brake thermal decay or brake fluid boiling and vaporization.

[0133] In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0134] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0135] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0136] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A vehicle braking control method, characterized in that: The method comprises: Acquire the brake disc temperature of each brake disc of the vehicle in real time, and determine the target brake disc temperature with the highest temperature value from the brake disc temperatures; Based on the target brake disc temperature, a target brake disc temperature interval is determined from a plurality of brake disc temperature intervals; wherein the brake disc temperature interval includes a first temperature interval, the brake disc temperature intervals are arranged in sequence according to the temperature size, and each of the brake disc temperature intervals corresponds to a brake disc control strategy; receiving a target braking displacement sent by a user, and converting the braking displacement into a target braking deceleration; The vehicle is braked based on a brake disc control strategy corresponding to the target brake disc temperature range to achieve the target braking deceleration, including: if the target brake disc temperature range is a first temperature range, determining the magnitude relationship between the target braking deceleration and a first deceleration threshold; if the target braking deceleration is less than or equal to the first deceleration threshold, braking the vehicle only by electric braking energy recovery; if the target braking deceleration is greater than the first deceleration threshold, calculating a first deceleration difference between the target braking deceleration and the first deceleration threshold, and dividing the target braking deceleration into a first deceleration threshold portion and a first deceleration difference portion; braking the first deceleration threshold portion is performed by the electric braking energy recovery method, and braking the first deceleration difference portion is performed by the hydraulic braking method.

2. The vehicle braking control method according to claim 1, characterized in that: The brake disc temperature interval further includes a second temperature interval, the second temperature interval is greater than the first temperature interval, and the brake disc control strategy based on the target brake disc temperature interval corresponding to the brake disc brakes the vehicle, further comprising: If the target brake disc temperature interval is the second temperature interval, recording the change trend of the target brake disc temperature to obtain the temperature growth rate of the target brake disc temperature; determining a second deceleration threshold in real time according to the temperature increase rate, the first deceleration threshold, the maximum value of the second temperature interval and the target brake disc temperature; determining whether the target braking deceleration is greater than a second deceleration threshold value determined when obtaining the target braking deceleration; If the target braking deceleration is less than or equal to the second deceleration threshold, braking the vehicle only by electric braking energy recovery; If the target braking deceleration is greater than the second deceleration threshold, calculating a second deceleration difference between the target braking deceleration and the second deceleration threshold, and dividing the target braking deceleration into a second deceleration threshold portion and a second deceleration difference portion; The electric braking energy recovery method is used to perform braking of the second deceleration threshold portion, and the hydraulic braking method is used to perform braking of the second deceleration difference portion.

3. The vehicle braking control method according to claim 2, characterized in that: The step of determining the second deceleration threshold in real time according to the temperature increase rate, the first deceleration threshold, the maximum value of the second temperature range, and the target brake disc temperature includes: calculating a temperature difference between a maximum value of the second temperature interval and a target brake disc temperature; determining a temperature rise time for the target brake disc temperature to reach the maximum value according to the temperature difference and the temperature increase rate; Obtaining the maximum deceleration that can be obtained by the electric braking energy recovery method; calculating a third deceleration difference between the maximum deceleration and the first deceleration threshold; The second deceleration threshold is determined in real time according to the third deceleration difference and the temperature rise time.

4. The vehicle braking control method according to claim 2, characterized in that: The brake disc temperature interval further includes a third temperature interval, the third temperature interval is greater than the second temperature interval, and the brake disc control strategy based on the target brake disc temperature interval corresponding to the brake disc brakes the vehicle further includes: If the target brake disc temperature range is the third temperature range, obtaining a maximum deceleration that can be obtained by the electric brake energy recovery method, and using the maximum deceleration as a third deceleration threshold; determining whether the target braking deceleration is greater than the third deceleration threshold; If the target braking deceleration is less than or equal to the third deceleration threshold, the vehicle is braked only by electric braking energy recovery; If the target braking deceleration is greater than the third deceleration threshold, calculating a fourth deceleration difference between the target braking deceleration and the third deceleration threshold, and dividing the target braking deceleration into a third deceleration threshold portion and a fourth deceleration difference portion; The electric braking energy recovery method is used to perform braking of the third deceleration threshold portion, and the hydraulic braking method is used to perform braking of half of the fourth deceleration difference portion.

5. The vehicle braking control method according to claim 4, characterized in that: The method further comprises: If the target brake disc temperature interval is the third temperature interval, a fault signal is generated, and based on the fault signal, a brake system fault light on the vehicle dashboard is controlled to light up to remind the user that a brake system fault has occurred.

6. The vehicle braking control method according to any one of claims 3 or 4, characterized in that: The obtaining of the maximum deceleration that can be obtained by the electric braking energy recovery method includes: Respectively obtain the remaining battery capacity, maximum battery charging power, maximum motor power generation and charging efficiency of the vehicle; Determine the maximum braking force that can be generated by the electric braking energy recovery method based on the remaining capacity of the battery, the maximum charging power of the battery, the maximum power generation power of the motor and the charging efficiency; The maximum braking force is converted to obtain the maximum deceleration.

7. An automobile brake control device, characterized in that: The automobile brake control device comprises: A target brake disc temperature determination unit, used to obtain the brake disc temperature of each brake disc of the vehicle in real time, and determine the target brake disc temperature with the highest temperature value from the brake disc temperatures; a target brake disc temperature interval determination unit, configured to determine a target brake disc temperature interval from a plurality of brake disc temperature intervals based on the target brake disc temperature; wherein the brake disc temperature intervals include a first temperature interval, the brake disc temperature intervals are arranged in sequence according to the temperature size, and each of the brake disc temperature intervals corresponds to a brake disc control strategy; A target braking deceleration conversion unit, configured to receive a target braking displacement sent by a user and convert the braking displacement into a target braking deceleration; A braking control unit, for braking the vehicle based on a brake disc control strategy corresponding to the target brake disc temperature range to achieve the target braking deceleration, comprising: if the target brake disc temperature range is a first temperature range, determining a magnitude relationship between the target braking deceleration and a first deceleration threshold; if the target braking deceleration is less than or equal to the first deceleration threshold, braking the vehicle only by electric braking energy recovery; if the target braking deceleration is greater than the first deceleration threshold, calculating a first deceleration difference between the target braking deceleration and the first deceleration threshold, and dividing the target braking deceleration into a first deceleration threshold portion and a first deceleration difference portion; respectively performing braking of the first deceleration threshold portion by the electric braking energy recovery method and performing braking of the first deceleration difference portion by the hydraulic braking method.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 6 when executing the program.

9. A car, characterized in that: The automobile implements the steps of any one of the methods of claims 1 to 6 when in operation.

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