Electric vehicle braking method, device and equipment

Abstract

The invention relates to the technical field of electric vehicle energy management control, in particular to an electric vehicle braking method, device and equipment. The electric vehicle braking method comprises the steps that whether an electric vehicle meets all preset conditions or not is determined; energy recovery is conducted through corresponding high-voltage accessories according to the preset conditions met by the electric automobile, and the high-voltage accessories comprise a direct-current and direct-current converter DCDC, a passenger compartment air conditioning system and a power battery cooling and heating system; and electric braking is carried out through the recycled energy. According to the embodiment of the invention, the high-voltage accessories carried by the electric automobile are started at the same time, and the high-voltage accessories are utilized to absorb energy to the greatest extent, so that the driving motor can provide greater electric braking force and reduce mechanical braking force, thereby reducing the abrasion of a mechanical braking system, avoiding braking thermal failure when the electric automobile continuously goes downhill for a long time, and improving the service life of the electric automobile. Therefore, the driving safety of the electric vehicle in the high SOC state is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle energy management control, in particular to an electric vehicle braking method, device and equipment. BACKGROUND

[0002] The electric vehicle is prohibited to drive the motor to recover energy in the high SOC state, so the electric vehicle cannot perform electric braking in the high SOC state and relies entirely on mechanical braking to stop. When the electric vehicle drives on a long downhill road for a long time, long-time use of mechanical braking will cause the brake friction plate to wear seriously, shorten the service life of the mechanical braking, and even cause the vehicle mechanical braking to be out of control and cause traffic accidents. SUMMARY

[0003] The electric vehicle braking method, device and equipment provided by the embodiments of the present application solve the driving safety problem caused by the electric vehicle being unable to perform electric braking in the high SOC state in the prior art.

[0004] In a first aspect, the embodiments of the present application provide an electric vehicle braking method, which comprises:

[0005] determining whether the electric vehicle meets each preset condition;

[0006] recovering energy through a corresponding high-voltage accessory according to the preset condition met by the electric vehicle, wherein the high-voltage accessory includes a DC-DC converter, a passenger cabin air conditioning system and a power battery cooling and heating system;

[0007] performing electric braking through the recovered energy.

[0008] Optionally, the preset condition includes a first braking condition, a second braking condition, a first working condition and a second working condition.

[0009] The first braking condition includes that the driving slope of the electric vehicle is greater than a preset slope threshold.

[0010] The second braking condition includes that the driving speed of the electric vehicle is greater than a preset speed threshold.

[0011] The first working condition includes that the passenger cabin air conditioning system of the electric vehicle is started.

[0012] The second working condition includes that the power battery cooling and heating system of the electric vehicle is started.

[0013] Optionally, recovering energy through the corresponding high-voltage accessory according to the preset condition met by the electric vehicle includes:

[0014] When the electric vehicle does not satisfy the first braking condition, and / or, does not satisfy the second braking condition, energy recovery is performed through the high-pressure accessory which has been turned on;

[0015] When the electric vehicle satisfies the first braking condition and the second braking condition simultaneously, energy recovery is performed through all high-pressure accessories.

[0016] Optionally, when the electric vehicle satisfies the first braking condition and the second braking condition simultaneously, energy recovery is performed through all high-pressure accessories, comprising:

[0017] Determining whether the electric vehicle satisfies the first working condition, and / or, the second working condition;

[0018] When the electric vehicle satisfies the first working condition, controlling the passenger cabin air conditioner heating system or the passenger cabin air conditioner refrigeration system which has not been turned on to be turned on to perform energy recovery;

[0019] When the electric vehicle satisfies the second working condition, controlling the power battery cooling system or the power battery heating system which has not been turned on to be turned on to perform energy recovery.

[0020] Optionally, when the electric vehicle satisfies the first working condition, controlling the passenger cabin air conditioner heating system or the passenger cabin air conditioner refrigeration system which has not been turned on to be turned on to perform energy recovery, comprising:

[0021] When the passenger cabin air conditioner refrigeration system works at a refrigeration power, simultaneously turning on the passenger cabin air conditioner heating system to work at a heating power, and increasing the refrigeration power of the passenger cabin air conditioner refrigeration system, wherein the passenger cabin air conditioner system further corrects the air outlet temperature by a refrigeration correction power;

[0022] When the passenger cabin air conditioner heating system works at a heating power, simultaneously turning on the passenger cabin air conditioner refrigeration system to work at a refrigeration power, and increasing the refrigeration power of the passenger cabin air conditioner heating system, wherein the passenger cabin air conditioner system further corrects the air outlet temperature by a heating correction power;

[0023] The when the electric vehicle satisfies the second working condition, controlling the power battery cooling system or the power battery heating system which has not been turned on to be turned on to perform energy recovery, comprising:

[0024] When the power battery cooling system works at a cooling power, simultaneously turning on the power battery heating system to work at a heating power, and increasing the cooling power of the power battery cooling system, wherein the power battery cooling and heating system further corrects the air outlet temperature by a cooling correction power;

[0025] When the power battery heating system works at a heating power, the power battery cooling system is simultaneously started to work at a cooling power, and the heating power of the power battery heating system is increased, wherein the power battery cooling heating system further corrects the outlet air temperature by a heating correction power.

[0026] Optionally, the method further comprises:

[0027] When it is determined that the electric vehicle does not meet the first working condition, the passenger cabin air conditioning heating system and the passenger cabin air conditioning refrigeration system in the passenger cabin air conditioning system are simultaneously started, wherein the heating power of the passenger cabin air conditioning heating system and the refrigeration power of the passenger cabin air conditioning refrigeration system are the same; and / or

[0028] When it is determined that the electric vehicle does not meet the second working condition, the power battery cooling system and the power battery heating system in the power battery cooling heating system are simultaneously started, wherein the cooling power of the power battery cooling system and the heating power of the power battery heating system are the same.

[0029] Optionally, the energy recovery through the corresponding high-voltage accessories comprises:

[0030] The recovered power is used to drive the motor energy recovery.

[0031] The recovered power is the sum of the working powers of the started high-voltage accessories.

[0032] In a second aspect, an embodiment of the present application provides an electric vehicle braking device, which comprises:

[0033] A determination module is configured to determine whether the electric vehicle meets each preset condition.

[0034] A recovery module is configured to recover energy through corresponding high-voltage accessories according to the preset conditions met by the electric vehicle, wherein the high-voltage accessories comprise a DC / DC converter, a passenger cabin air conditioning system, and a power battery cooling heating system.

[0035] A braking module is configured to brake electrically through the recovered energy.

[0036] In a third aspect, an embodiment of the present application provides an electronic device, which comprises:

[0037] At least one processor; and

[0038] At least one memory connected to the processor in communication, wherein:

[0039] The memory stores program instructions executable by the processor, and the processor invoking the program instructions can execute the method according to any one of the first aspect.

[0040] In a fourth aspect, an embodiment of the present application provides a storage medium, the storage medium comprising a stored program, wherein the program, when executed, controls a device in which the storage medium is arranged to perform the method of any one of the first aspect.

[0041] The embodiment of the present application determines the driving scene of the electric vehicle, when it is determined that the electric vehicle has a high braking capacity requirement, the high-voltage accessories carried by the electric vehicle are started at the same time, the energy absorption of the high-voltage accessories is maximized, the driving motor can provide greater electric braking force, and the mechanical braking force is reduced, thereby reducing the wear of the mechanical braking system, avoiding the brake thermal failure of the electric vehicle when continuously driving on a long downhill, causing brake failure and traffic accidents, and improving the driving safety of the electric vehicle in the high SOC state. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0043] Figure 1 Fig. 1 shows a flowchart of a braking method of an electric vehicle provided by an embodiment of the present application;

[0044] Figure 2 Fig. 2 shows a structural schematic diagram of a braking device of an electric vehicle provided by an embodiment of the present application;

[0045] Figure 3 Fig. 3 shows a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0047] It should be clear that the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0048] The current electric vehicle prohibits the driving motor from recovering energy when the state of charge (SOC) of the battery is high, and the power battery is not allowed to have a charging current to avoid damage caused by overcharging. Although this method can meet the battery management and energy management of the whole vehicle, it does not fully utilize the recovered energy of the whole vehicle.

[0049] As the State of Charge (SOC) value of a power battery continues to decrease below a high SOC level, the allowable charging current increases, allowing the drive motor to recover more energy. In a low SOC state, electric vehicles prioritize electric braking using recovered energy; if electric braking is insufficient, mechanical braking from the braking system is employed. However, in a high SOC state, energy recovery by the drive motor is prohibited, rendering electric braking impossible and relying entirely on mechanical braking. This results in a significant difference in braking capability between high and low SOC states.

[0050] When an electric vehicle travels on a long downhill road for an extended period, it is in a high SOC state and cannot use the regenerative braking force of the drive motor for electric braking. Instead, it must rely entirely on mechanical braking through the braking system. Furthermore, in a high SOC state, the electric vehicle lacks the internal resistance braking force of the engine. The same braking demand requires the braking system to provide more mechanical braking force, which can lead to severe wear of the brake pads, shortening the life of the mechanical brakes. In more serious cases, it may even cause thermal runaway of the vehicle's mechanical brakes, resulting in traffic accidents and posing a threat to the safety of users' lives and property.

[0051] like Figure 1 The image shows an electric vehicle braking method provided by an embodiment of the present invention. See also... Figure 1 The specific steps of this method include:

[0052] S101, determine whether the electric vehicle meets the preset conditions.

[0053] Specifically, electric vehicles use onboard sensors to collect information about their surroundings, such as whether they are on a slope and the slope's gradient. Electric vehicles also use sensors to obtain information about their own driving status, such as speed and whether high-voltage accessories are activated. These high-voltage accessories typically include a DC-to-DC converter (DCDC), a passenger compartment air conditioning system, and a battery cooling and heating system.

[0054] Electric vehicles determine whether they meet preset conditions by collecting various parameters.

[0055] The preset conditions include braking conditions and operating conditions. The braking conditions specifically include the first braking condition and the second braking condition, and the operating conditions specifically include the first operating condition and the second operating condition.

[0056] The first braking condition is that the driving gradient of the electric vehicle is greater than a preset gradient threshold; the second braking condition is that the driving speed of the electric vehicle is greater than a preset speed threshold; the first operating condition is that the passenger compartment air conditioning system of the electric vehicle is started; and the second operating condition is that the power battery cooling and heating system of the electric vehicle is started.

[0057] Generally, the slope threshold value can be set to 1%, and the speed threshold value can be set to 40 km / h.

[0058] S102, according to the preset conditions met by the electric vehicle, energy is recovered through the corresponding high-voltage accessories.

[0059] Specifically, it is determined whether the electric vehicle meets the braking condition. When the electric vehicle meets both the first braking condition and the second braking condition, it is determined that the electric vehicle meets the braking condition. When the electric vehicle does not meet the first braking condition and / or the second braking condition, i.e., the driving slope of the electric vehicle is not greater than the preset slope threshold value, and / or the driving speed of the electric vehicle is not greater than the preset speed threshold value, it is determined that the electric vehicle does not meet the braking condition.

[0060] When the electric vehicle does not meet the braking condition, it means that the electric vehicle is not in the steep slope area, and the speed is not fast, and the braking capacity requirement is not high. Safe braking can be achieved by mechanical braking alone or by small electric braking assisting mechanical braking.

[0061] Therefore, when the electric vehicle does not meet the braking condition, energy recovery is performed through the high-voltage accessories that have been turned on. That is, the energy generated by the drive motor is recovered through the DCDC; if the passenger cabin air conditioning system is turned on, the energy generated by the drive motor is recovered through the passenger cabin air conditioning system, and if it is not turned on, it is not recovered through the passenger cabin air conditioning system; if the power battery cooling and heating system is turned on, the energy generated by the drive motor is recovered through the power battery cooling and heating system, and if it is not turned on, it is not recovered through the power battery cooling and heating system.

[0062] When the electric vehicle meets the braking condition, i.e., when the electric vehicle meets both the first braking condition and the second braking condition, it means that the electric vehicle is in the steep slope area, and the speed is fast, and the braking capacity requirement is high. Safe braking cannot be achieved by mechanical braking alone or by small electric braking assisting mechanical braking, which may cause hidden dangers to driving safety.

[0063] Therefore, when the electric vehicle meets the braking condition, all high-voltage accessories are turned on, and energy recovery is performed through all high-voltage accessories. That is, the energy generated by the drive motor is recovered through the DCDC, the passenger cabin air conditioning system, and the power battery cooling and heating system. If the passenger cabin air conditioning system is not turned on, the passenger cabin air conditioning system is turned on, and the energy generated by the drive motor is recovered through the passenger cabin air conditioning system; if the power battery cooling and heating system is not turned on, the power battery cooling and heating system is turned on, and the energy generated by the drive motor is recovered through the power battery cooling and heating system.

[0064] S103, electric braking is performed through the recovered energy.

[0065] Specifically, the driving motor recovers energy through the recovered power and brakes electrically through the recovered energy. The recovered power of the driving motor is the sum of the working powers of the started high-voltage accessories. That is, the sum of the working power of the DCDC, the working power of the passenger cabin air conditioning system when the passenger cabin air conditioning system is started, and the working power of the power battery cooling and heating system when the power battery cooling and heating system is started.

[0066] The embodiment of the application determines the driving scene of the electric vehicle, and when it is determined that the electric vehicle has a high braking capacity requirement, the high-voltage accessories carried by the electric vehicle are started at the same time to maximize the energy absorption of the high-voltage accessories, so that the driving motor can provide greater electric braking force and reduce the mechanical braking force, thereby reducing the wear of the mechanical braking system, avoiding brake thermal failure when the electric vehicle continuously drives down a long slope, causing brake failure and traffic accidents, and improving the driving safety of the electric vehicle in a high SOC state.

[0067] Optionally, in some embodiments, when it is determined through S102 that the electric vehicle meets the braking condition, the working power of each high-voltage accessory can be increased to increase the recovered power of the driving motor, so that the driving motor can maximize the energy absorption of the high-voltage accessories and provide greater electric braking force.

[0068] Specifically, when the electric vehicle meets the first working condition, the unstarted passenger cabin air conditioning heating system or passenger cabin air conditioning refrigeration system is started. That is, when the passenger cabin air conditioning refrigeration system is working, the passenger cabin air conditioning heating system is started at the same time; when the passenger cabin air conditioning heating system is working, the passenger cabin air conditioning refrigeration system is started at the same time. At this time, the working power of the passenger cabin air conditioning system is the sum of the refrigeration power and the heating power.

[0069] When the passenger cabin air conditioning system is started and works at the refrigeration power, the passenger cabin air conditioning heating system is started and works at the heating power at the same time. At the same time, the refrigeration power of the passenger cabin air conditioning refrigeration system is increased, and the air conditioning outlet temperature is corrected through the refrigeration correction power, so that the air outlet of the passenger cabin air conditioning system meets the refrigeration demand of the user.

[0070] In a specific embodiment, the passenger cabin air conditioning system is in a refrigeration state and works at a refrigeration power akw, at this time, the passenger cabin air conditioning heating system is started and works at a heating power bkw. The power of the passenger cabin air conditioning refrigeration system is increased to (a+b+c) kw, where ckw is the air conditioning correction power that meets the refrigeration demand of the passenger cabin. The refrigeration capacity of the passenger cabin air conditioning system is greater than the heating capacity, and meets the refrigeration demand of the user for the passenger cabin.

[0071] Wherein, the boosted refrigeration power (a+b+c) kw needs to be less than the maximum working power of the passenger cabin air conditioning refrigeration system, and the heating power b kw needs to be less than the maximum working power of the passenger cabin air conditioning heating system.

[0072] When the passenger cabin air conditioning system is started and works at the heating power, the passenger cabin air conditioning refrigeration system is started and works at the refrigeration power at the same time. Meanwhile, the heating power of the passenger cabin air conditioning heating system is increased, and the air conditioning outlet temperature is corrected by the heating correction power, so that the passenger cabin air conditioning system outlet air meets the heating demand of the user.

[0073] In a specific embodiment, the passenger cabin air conditioning system is in the heating state and works at the heating power e kw, at this time, the passenger cabin air conditioning refrigeration system is started and works at the refrigeration power f kw. The power of the passenger cabin air conditioning heating system is boosted to (e+f+g) kw, wherein g kw is the air conditioning correction power meeting the heating demand of the passenger cabin. The heating capacity of the passenger cabin air conditioning system is greater than the refrigeration capacity, and meets the heating demand of the user for the passenger cabin.

[0074] Wherein, the boosted heating power (e+f+g) kw needs to be less than the maximum working power of the passenger cabin air conditioning heating system, and the refrigeration power f kw needs to be less than the maximum working power of the passenger cabin air conditioning refrigeration system.

[0075] When the electric vehicle does not meet the first working condition, the passenger cabin air conditioning heating system and the passenger cabin air conditioning refrigeration system in the passenger cabin air conditioning system are started at the same time. Wherein, the heating power of the passenger cabin air conditioning heating system and the refrigeration power of the passenger cabin air conditioning refrigeration system are the same, so as to keep the thermal balance of the passenger cabin air conditioning refrigeration system and the passenger cabin air conditioning heating system. The working power of the passenger cabin air conditioning system is the minimum value of the maximum working power of the passenger cabin air conditioning refrigeration system and the passenger cabin air conditioning heating system.

[0076] Optionally, when the electric vehicle meets the second working condition, the unstarted power battery cooling system or power battery heating system is controlled to start. That is, when the power battery cooling system works, the power battery heating system is started at the same time; when the power battery heating system works, the power battery cooling system is started at the same time. At this time, the working power of the power battery cooling and heating system is the sum of the cooling power and the heating power.

[0077] When the power battery cooling system is started and works at the cooling power, the power battery heating system is started and works at the heating power at the same time. Meanwhile, the cooling power of the power battery cooling system is increased, and the outlet air temperature is corrected by the cooling correction power, so that the outlet air of the power battery cooling and heating system meets the cooling demand of the power battery.

[0078] In one specific embodiment, the power battery cooling and heating system is in a cooling state and works at a cooling power a1kw, and the power battery heating system is turned on and works at a heating power b1kw. The power of the power battery cooling system is increased to (a1+b1+c1)kw, where c1kw is a cooling correction power that meets the cooling requirement of the power battery. The cooling capacity of the power battery cooling and heating system is greater than the heating capacity, and meets the cooling requirement of the power battery.

[0079] The increased cooling power (a1+b1+c1)kw needs to be less than the maximum working power of the power battery cooling system, and the heating power bkw needs to be less than the maximum working power of the power battery heating system.

[0080] When the power battery heating system is turned on and works at a heating power, the power battery cooling system is also turned on and works at a cooling power. At the same time, the heating power of the power battery heating system is increased, and the air outlet temperature is corrected by a heating correction power, so that the air outlet of the power battery cooling and heating system meets the heating requirement of the power battery.

[0081] In one specific embodiment, the power battery cooling and heating system is in a heating state and works at a cooling power e1kw, and the power battery cooling system is turned on and works at a cooling power f1kw. The power of the power battery heating system is increased to (e1+f1+g1)kw, where g1kw is a heating correction power that meets the heating requirement of the power battery. The heating capacity of the power battery cooling and heating system is greater than the cooling capacity, and meets the heating requirement of the power battery.

[0082] The increased cooling power (a1+b1+c1)kw needs to be less than the maximum working power of the power battery cooling system, and the heating power bkw needs to be less than the maximum working power of the power battery heating system.

[0083] When the electric vehicle does not meet the second working condition, the power battery cooling system and the power battery heating system in the power battery cooling and heating system are turned on at the same time. The cooling power of the power battery cooling system and the heating power of the power battery heating system are the same, so as to maintain the thermal balance between the power battery cooling system and the power battery heating system. The working power of the power battery cooling and heating system is the minimum value of the maximum working power of the power battery cooling system and the power battery heating system.

[0084] Optionally, in some embodiments, after the passenger cabin air conditioning refrigeration system and the passenger cabin air conditioning heating system, and / or the power battery cooling system and the power battery heating system are started, it is also necessary to detect whether the electric vehicle meets the braking condition in a timing manner or in a real-time manner. When the electric vehicle does not meet the braking condition, i.e., when the driving slope of the vehicle is less than a preset slope threshold or the driving speed of the vehicle is less than a preset speed threshold, the passenger cabin air conditioning system and the power battery cooling and heating system are restored to the initial state.

[0085] Optionally, in some embodiments, when the SOC of the electric vehicle decreases to below a preset power threshold, the electric vehicle restores the driving motor to perform energy recovery, and no longer needs to recover energy through the high-voltage accessories, and it is also necessary to restore the passenger cabin air conditioning system and the power battery cooling and heating system to the initial state.

[0086] Generally, the power threshold of the SOC can be set to 90%.

[0087] Corresponding to the above electric vehicle braking method, the embodiment of the present application also provides an electric vehicle braking device. Referring to Figure 2 A structural schematic diagram of an electric vehicle braking device provided by an embodiment of the present application is shown in the figure. The electric vehicle braking device can include a determination module 201, a recovery module 202, and a braking module 203.

[0088] The determination module 201 determines whether the electric vehicle meets each preset condition.

[0089] The recovery module 202 recovers energy through corresponding high-voltage accessories according to the preset conditions met by the electric vehicle, and the high-voltage accessories include a DC-DC converter DCDC, a passenger cabin air conditioning system, and a power battery cooling and heating system.

[0090] The braking module 203 brakes electrically through the recovered energy.

[0091] Figure 3 A structural schematic diagram of an embodiment of an electronic device of the present specification is shown in the figure. As Figure 3 shown, the above electronic device can include at least one processor; and at least one memory in communication connection with the above processing unit, wherein: the memory stores program instructions that can be executed by the processing unit, and the above processor calling the above program instructions can execute the electric vehicle braking method provided by the embodiment.

[0092] Among them, the above electronic device can be a device capable of intelligent conversation with the user, for example: a cloud server, and the present specification does not limit the specific form of the above electronic device. It can be understood that the electronic device here is the machine mentioned in the method embodiment.

[0093] Figure 3 A block diagram of an exemplary electronic device suitable for use in implementing the embodiments of the present specification is shown. Figure 3 The electronic device shown is merely one example. It should be understood, however, that the functionality of the embodiments of the present specification and the scope of use are not limited to this example.

[0094] As Figure 3 shown, the electronic device is in the form of a general purpose computing device. The components of the electronic device can include, but are not limited to, one or more processors 310, a communication interface 320, a memory 330, a communication bus 340 that connects different system components including the memory 330, the communication interface 320, and the processor 310.

[0095] The communication bus 340 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration bus, a processor or local bus using any of a variety of bus architectures including Industry Standard Architecture (ISA), Micro Channel Architecture (MAC), Enhanced ISA (EISA), Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

[0096] The electronic device typically includes a variety of computer system readable media. Such media can be any available media that is accessible by the electronic device and includes both volatile and non-volatile media, removable and non-removable media.

[0097] The memory 330 can include computer system readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The electronic device can further include other removable / non-removable, volatile / non-volatile computer system storage media. The memory 330 can include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the present specification.

[0098] The program / utility, having a set (at least one) of program modules, can be stored in the memory 330 by example, and not limitation, includes an operating system, one or more application programs, other program modules, and program data, each or some combination thereof, implementing the

[0099] The processor 310 performs the functions of various embodiments described in this specification by executing the program stored in the memory 330, thereby performing various functions and data processing, such as implementing the electric vehicle braking method provided by the embodiments of the present specification.

[0100] The embodiments of the present specification provide a non-transitory computer readable storage medium storing computer instructions, which cause the computer to perform the electric vehicle braking method provided by the embodiments of the present specification.

[0101] The non-transitory computer readable storage medium described above can adopt any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination thereof. More specific examples (non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read only memory (ROM), an erasable programmable read only memory (EPROM) or flash memory, an optical fiber, a portable compact disk read only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus or device.

[0102] The computer readable signal medium can include a data signal propagated in baseband or propagated as a carrier wave in a propagated data signal, in which the computer readable program code is embodied. Such propagated data signal can take a variety of forms, including but not limited to, electro-magnetic, optical or any suitable combination thereof. The computer readable signal medium can also be any computer readable medium that can send, propagate or transfer program for use by or in connection with an instruction execution system, apparatus or device.

[0103] The program code embodied on the computer readable media can be transmitted using any appropriate medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0104] Computer program code for carrying out operations of the present specification can be written in any suitable programming language including object oriented programming languages, such as Java, Smalltalk, C++, as well as conventional procedural programming languages, such as the "C" programming language, or the like. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0105] The specific embodiments of the present specification have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results. Additionally, the process depicted in the figures does not necessarily require the particular order shown, or sequential order to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous.

[0106] In addition, the terms "first", "second", etc., are used herein only to describe different instances, and do not imply or suggest relative importance or a number of indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the specification, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0107] Any process or method descriptions or descriptions of processes or methods contained herein can be understood as representing any manner of executing steps of the process or method, and any suitable sequence of steps can be employed, including substantially simultaneous execution of the steps of the process or method, or in reverse order of the steps for described processes or methods. The scope of preferred embodiments of the present specification includes any suitable process or method that implements or utilizes the described features any number of ways.

[0108] Depending on the context, the word "if" as used herein can be interpreted to mean "when" or "while" or "in response to determining" or "in response to detecting." Similarly, the phrase "if it is determined" or "if [a stated condition or event] is detected" can be interpreted to mean "upon determining" or "in response to determining" or "upon detecting [the stated condition or event]" or "in response to detecting [the stated condition or event]."

[0109] It should be noted that the terminal involved in the embodiments of the present specification can include, but is not limited to, a personal computer (PC), a personal digital assistant (PDA), a wireless handheld device, a tablet computer, a mobile phone, an MP3 player, an MP4 player, and the like.

[0110] In the embodiments provided by the present specification, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. There can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0111] In addition, each function unit in each embodiment of the present specification can be integrated into one processing unit, or each unit can exist alone physically, or two or more units can be integrated into one unit. The above integrated unit can be realized in the form of hardware, or in the form of hardware plus software function unit.

[0112] The integrated unit realized in the form of software function unit can be stored in a computer readable storage medium. The software function unit stored in the storage medium includes a plurality of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (Processor) to perform some steps of the methods described in each embodiment of the present specification.

[0113] The above only describes the preferred embodiments of the present specification and is not intended to limit the present specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification shall be included in the scope of protection of the present specification.

Claims

1. An electric vehicle braking method, characterized by, The method comprises: determining whether the electric vehicle meets preset conditions; recovering energy through corresponding high-voltage accessories according to the preset conditions met by the electric vehicle, the high-voltage accessories comprising a DC-DC converter, a passenger cabin air conditioning system, and a power battery cooling and heating system; performing electric braking through the recovered energy.

2. The method of claim 1, wherein, The preset conditions comprise a first braking condition, a second braking condition, a first working condition, and a second working condition. The first braking condition comprises that the driving slope of the electric vehicle is greater than a preset slope threshold. The second braking condition comprises that the driving speed of the electric vehicle is greater than a preset speed threshold. The first working condition comprises that the passenger cabin air conditioning system of the electric vehicle is started. The second working condition comprises that the power battery cooling and heating system of the electric vehicle is started.

3. The method of claim 2, wherein, The recovering energy through corresponding high-voltage accessories according to the preset conditions met by the electric vehicle comprises: recovering energy through the high-voltage accessories that have been started when the electric vehicle does not meet the first braking condition and / or does not meet the second braking condition; recovering energy through all the high-voltage accessories when the electric vehicle meets both the first braking condition and the second braking condition.

4. The method of claim 3, wherein, The recovering energy through all the high-voltage accessories when the electric vehicle meets both the first braking condition and the second braking condition comprises: determining whether the electric vehicle meets the first working condition and / or the second working condition; controlling the passenger cabin air conditioning heating system or the passenger cabin air conditioning refrigeration system that has not been started to be started to perform energy recovery when the electric vehicle meets the first working condition; controlling the power battery cooling system or the power battery heating system that has not been started to be started to perform energy recovery when the electric vehicle meets the second working condition.

5. The method of claim 4, wherein, The controlling the passenger cabin air conditioning heating system or the passenger cabin air conditioning refrigeration system that has not been started to be started to perform energy recovery when the electric vehicle meets the first working condition comprises: when the passenger cabin air conditioning refrigeration system is working at a refrigeration power, simultaneously starting the passenger cabin air conditioning heating system to work at a heating power and increasing the refrigeration power of the passenger cabin air conditioning refrigeration system, wherein the passenger cabin air conditioning system further corrects the air outlet temperature by a refrigeration correction power; when the passenger cabin air conditioning heating system is working at a heating power, simultaneously starting the passenger cabin air conditioning refrigeration system to work at a refrigeration power and increasing the refrigeration power of the passenger cabin air conditioning heating system, wherein the passenger cabin air conditioning system further corrects the air outlet temperature by a heating correction power. The controlling the power battery cooling system or the power battery heating system that has not been started to be started to perform energy recovery when the electric vehicle meets the second working condition comprises: when the power battery cooling system is working at a cooling power, simultaneously starting the power battery heating system to work at a heating power and increasing the cooling power of the power battery cooling system, wherein the power battery cooling and heating system further corrects the air outlet temperature by a cooling correction power. When the power battery heating system works at a heating power, the power battery cooling system is simultaneously started to work at a cooling power, and the heating power of the power battery heating system is increased, wherein the power battery cooling heating system further corrects the outlet air temperature by a heating correction power.

6. The method of claim 4, wherein, The method further comprises: When it is determined that the electric vehicle does not satisfy the first working condition, the passenger cabin air conditioning heating system and the passenger cabin air conditioning refrigeration system in the passenger cabin air conditioning system are simultaneously started, wherein the heating power of the passenger cabin air conditioning heating system and the refrigeration power of the passenger cabin air conditioning refrigeration system are the same; and / or When it is determined that the electric vehicle does not satisfy the second working condition, the power battery cooling system and the power battery heating system in the power battery cooling heating system are simultaneously started, wherein the cooling power of the power battery cooling system and the heating power of the power battery heating system are the same.

7. The method of claim 1, wherein, The energy recovery through the corresponding high-voltage accessories comprises: The motor energy recovery is driven by the recovered power; The recovered power is the sum of the working powers of the started high-voltage accessories.

8. An electric vehicle brake apparatus characterized by comprising: The device comprises: a determination module that determines whether the electric vehicle satisfies each preset condition; a recovery module that recovers energy through corresponding high-voltage accessories according to the preset conditions satisfied by the electric vehicle, wherein the high-voltage accessories comprise a DCDC, a passenger cabin air conditioning system, and a power battery cooling heating system; a braking module that brakes by the recovered energy.

9. An electronic device, comprising: comprise: at least one processor; and at least one memory connected with the processor in communication, wherein: the memory stores program instructions that can be executed by the processor, and the processor calling the program instructions can execute the method according to any one of claims 1 to 7.

10. A storage medium, characterized by The storage medium comprises a stored program, wherein when the program runs, the device where the storage medium is located executes the method according to any one of claims 1 to 7.

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