Vehicle hybrid mode switching energy control method and system

Abstract

The invention provides a vehicle hybrid mode switching energy control method and system.The method comprises the steps that when it is detected that a hybrid vehicle is in a running state in real time, the working mode of a hybrid system in the hybrid vehicle is detected in real time; when it is detected that the hybrid power system is in the series connection mode in real time, the available power of the whole vehicle system in the hybrid power vehicle is controlled in real time according to a first preset rule; when it is detected that the hybrid power system is in the series-cut-parallel mode in real time, the available power of the whole vehicle system in the hybrid power vehicle is controlled in real time according to a second preset rule; and when it is detected that the hybrid power system is in the parallel connection mode in real time, the available power of the whole vehicle system in the hybrid power vehicle is controlled in real time according to a third preset rule. The torque control of the wheel end can be smoothly completed, and the use experience of a user is correspondingly improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a vehicle hybrid mode switching energy control method and system. Background Art

[0002] With the advancement of science and technology and the rapid development of productivity, cars have become popular in people's daily lives and have become one of the indispensable means of transportation for people's daily travel, greatly facilitating people's lives.

[0003] Among the existing hybrid solutions, the range-extending solution relies solely on the motor to drive the vehicle, avoiding the vehicle's drivability issues caused by mode switching. However, because the vehicle is driven solely by the drive motor, when the vehicle's attribute standards require a larger power range, only a larger drive motor can be selected, which increases costs. Although the engine can participate in the vehicle's drive in the single-speed hybrid solution, the parallel mode only works in low-power demand conditions. Therefore, when the vehicle's attribute standards require a larger power range, only a larger drive motor can be selected, which increases costs. In a multi-speed series-parallel hybrid architecture, when the vehicle's power demand increases, the vehicle will undergo a series switch to parallel, and shift gears in parallel mode to meet the vehicle's power requirements. Therefore, solving the drivability issues during the series-parallel switching process has become the key to the multi-speed series-parallel hybrid architecture. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a vehicle hybrid mode switching energy control method and system to solve the problem in the prior art that when the power demand of the whole vehicle is large and is between the available system power in parallel mode and series mode, the smoothness and power performance of the whole vehicle are poor.

[0005] The first aspect of the embodiment of the present invention proposes:

[0006] A vehicle hybrid mode switching energy control method, wherein the method comprises:

[0007] When it is detected in real time that the hybrid vehicle is in a driving state, detecting in real time the working mode of the hybrid system in the hybrid vehicle;

[0008] When it is detected in real time that the hybrid system is in the series mode, the available power of the whole vehicle system inside the hybrid vehicle is controlled in real time according to a first preset rule;

[0009] When it is detected in real time that the hybrid system is in the series-to-parallel mode, the available power of the whole vehicle system inside the hybrid vehicle is controlled in real time according to a second preset rule;

[0010] When it is detected in real time that the hybrid system is in the parallel mode, the available power of the entire vehicle system inside the hybrid vehicle is controlled in real time according to a third preset rule.

[0011] The beneficial effects of the present invention are:

[0012] Key point 1: During the mode switching process, the available power of the battery pack is used for 2s, and the short-term large available power is used to complete the insufficient capacity during the mode switching process;

[0013] Key point 2: During the mode switching process, the available power of the battery pack for 2s is used, and the entry and exit of power are transitioned based on a certain slope gradient, thereby increasing the smoothness of the power transition.

[0014] Furthermore, when it is detected in real time that the hybrid system is in the series mode, the step of controlling the available power of the whole vehicle system in the hybrid vehicle in real time according to the first preset rule comprises:

[0015] When it is detected that the hybrid system is in the series mode, the discharge power generated by the battery pack in the hybrid vehicle and the power generated by the generator within 10 seconds are detected in real time;

[0016] The discharge power and the generation power are accumulated to calculate the available power of the whole vehicle system.

[0017] Furthermore, the method further comprises:

[0018] Real-time detection of the discharge power allowed by the battery pack in the hybrid vehicle within 2 seconds and the power generated by the generator;

[0019] Accumulating the discharge power and the generation power to calculate the target available power value of the series-connected vehicle system;

[0020] The available power of the whole vehicle system in the series mode is taken as the initial value, and the target value of the system available power of the series-cut and parallel mode is reached according to the filtering gradient to calculate the available power of the series-cut and parallel mode system.

[0021] The method further comprises:

[0022] Real-time detection of the discharge power allowed by the battery pack in the hybrid vehicle in 10 seconds and the maximum available power of the engine, and accumulation of the discharge power and the maximum available power to calculate the target available power value of the parallel vehicle system;

[0023] The available power of the whole vehicle system in the series-to-parallel mode is taken as the initial value, and the target value of the available power of the parallel system is calculated according to the filtering gradient to calculate the available power of the parallel system.

[0024] Furthermore, when the series-to-parallel mode of the hybrid vehicle ends, the hybrid vehicle is controlled to enter the parallel mode accordingly.

[0025] The second aspect of the embodiment of the present invention proposes:

[0026] A vehicle hybrid mode switching energy control system, wherein the system comprises:

[0027] A detection module, configured to detect in real time the working mode of the hybrid system in the hybrid vehicle when it is detected in real time that the hybrid vehicle is in a driving state;

[0028] A first processing module, configured to control the available power of the entire vehicle system in the hybrid vehicle in real time according to a first preset rule when it is detected in real time that the hybrid system is in a series mode;

[0029] A second processing module is used to control the available power of the whole vehicle system in the hybrid vehicle in real time according to a second preset rule when it is detected in real time that the hybrid system is in a series-cut-parallel mode;

[0030] The third processing module is used to control the available power of the entire vehicle system inside the hybrid vehicle in real time according to a third preset rule when it is detected in real time that the hybrid system is in the parallel mode.

[0031] Furthermore, the method further comprises:

[0032] Real-time detection of the discharge power allowed by the battery pack in the hybrid vehicle within 2 seconds and the power generated by the generator;

[0033] Accumulating the discharge power and the generation power to calculate the target available power value of the series-connected vehicle system;

[0034] The available power of the whole vehicle system in the series mode is taken as the initial value, and the target value of the system available power of the series-cut and parallel mode is reached according to the filtering gradient to calculate the available power of the series-cut and parallel mode system.

[0035] Furthermore, the method further comprises:

[0036] Real-time detection of the discharge power allowed by the battery pack in the hybrid vehicle in 10 seconds and the maximum available power of the engine, and accumulation of the discharge power and the maximum available power to calculate the target available power value of the parallel vehicle system;

[0037] The available power of the whole vehicle system in the series-to-parallel mode is taken as the initial value, and the target value of the available power of the parallel system is calculated according to the filtering gradient to calculate the available power of the parallel system.

[0038] Furthermore, when the series-to-parallel mode of the hybrid vehicle ends, the hybrid vehicle is controlled to enter the parallel mode accordingly.

[0039] The third aspect of the embodiment of the present invention proposes:

[0040] A computer comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the vehicle hybrid mode switching energy control method as described above when executing the computer program.

[0041] The fourth aspect of the embodiments of the present invention proposes:

[0042] A readable storage medium stores a computer program thereon, wherein when the program is executed by a processor, the vehicle hybrid mode switching energy control method as described above is implemented.

[0043] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A flow chart of a vehicle hybrid mode switching energy control method provided by a first embodiment of the present invention;

[0045] Figure 2 A schematic diagram of the control principle of a vehicle hybrid mode switching energy control method provided by a second embodiment of the present invention;

[0046] Figure 3 This is a structural block diagram of a vehicle hybrid mode switching energy control system provided in the third embodiment of the present invention.

[0047] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0048] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0049] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0051] See also Figure 1 , shown is a vehicle hybrid mode switching energy control method provided by the first embodiment of the present invention. The vehicle hybrid mode switching energy control method provided by this embodiment can accurately control the available power of the entire vehicle system, improve the smoothness of vehicle driving, and at the same time improve the user experience.

[0052] Specifically, this embodiment provides:

[0053] A vehicle hybrid mode switching energy control method specifically comprises the following steps:

[0054] Step S10, when it is detected in real time that the hybrid vehicle is in a driving state, detecting in real time the working mode of the hybrid system in the hybrid vehicle;

[0055] Step S20, when it is detected in real time that the hybrid system is in the series mode, controlling the available power of the whole vehicle system inside the hybrid vehicle in real time according to a first preset rule;

[0056] Step S30, when it is detected in real time that the hybrid system is in the series-to-parallel mode, controlling the available power of the entire vehicle system inside the hybrid vehicle in real time according to a second preset rule;

[0057] Step S40: When it is detected in real time that the hybrid system is in the parallel mode, the available power of the entire vehicle system inside the hybrid vehicle is controlled in real time according to a third preset rule.

[0058] Second embodiment

[0059] Furthermore, when it is detected in real time that the hybrid system is in the series mode, the step of controlling the available power of the whole vehicle system in the hybrid vehicle in real time according to the first preset rule comprises:

[0060] When it is detected that the hybrid system is in the series mode, the discharge power generated by the battery pack in the hybrid vehicle and the power generated by the generator within 10 seconds are detected in real time;

[0061] The discharge power and the generation power are accumulated to calculate the available power of the whole vehicle system.

[0062] This solution recognizes the series-to-parallel mode and adjusts the system available power during the mode switching process, thereby achieving a smooth transition from series to parallel capacity.

[0063] Strategic Plan

[0064] In series mode: the available power of the vehicle system is equal to the 10s discharge power of the battery pack plus the generator power;

[0065] In series-to-parallel mode: When the series-to-parallel mode is activated, the available power of the vehicle system is based on the calculated available power in the series mode;

[0066] The target value is reached according to a certain filtering coefficient, where the target value of the available power of the vehicle system is equal to the 2s discharge power of the battery pack plus the power generated by the generator.

[0067] When the series-to-parallel mode ends and the parallel mode is entered, the available power of the vehicle system is calculated based on the available power in the series-to-parallel mode;

[0068] The target value is reached according to a certain filtering coefficient, where the target value of the available power of the entire vehicle system is equal to the 10s discharge power of the battery pack plus the generator power generation power.

[0069] In series mode, the available power of the vehicle system is equal to the 10s discharge power of the battery pack plus the generator power;

[0070] In parallel mode, the available power of the vehicle system is equal to the 10s discharge power of the battery pack plus the maximum available power of the engine.

[0071] Strategy implementation

[0072] 1. When the driver steps on the accelerator at full speed, the vehicle mode switches from series to parallel. Because the clutch is not closed during the switching process, the vehicle system capacity during the series-to-parallel process is the series system capacity.

[0073] 2. The solution before the modification used the battery pack's 10s power plus the generating power during the string cutting and paralleling process, resulting in lower available power for the entire vehicle, thus affecting the vehicle's power and drivability.

[0074] 3. The optimized solution uses the battery pack's 2s power plus the power generation power during the string cutting and paralleling process, and makes a good power connection problem for using the 2s power and exiting the 2s power, thereby ensuring power while improving the driving performance of the entire vehicle.

[0075] 4. When the vehicle completes serial switching and enters parallel connection, the system power switches to the available parallel power, that is, the available power of the engine plus the power of the battery pack for 10s.

[0076] See also Figure 3 , the third embodiment of the present invention provides:

[0077] A vehicle hybrid mode switching energy control system, wherein the system comprises:

[0078] A detection module, configured to detect in real time the working mode of the hybrid system in the hybrid vehicle when it is detected in real time that the hybrid vehicle is in a driving state;

[0079] A first processing module, configured to control the available power of the entire vehicle system in the hybrid vehicle in real time according to a first preset rule when it is detected in real time that the hybrid system is in a series mode;

[0080] A second processing module is used to control the available power of the whole vehicle system in the hybrid vehicle in real time according to a second preset rule when it is detected in real time that the hybrid system is in a series-cut-parallel mode;

[0081] The third processing module is used to control the available power of the entire vehicle system inside the hybrid vehicle in real time according to a third preset rule when it is detected in real time that the hybrid system is in the parallel mode.

[0082] Furthermore, the second processing module is specifically used for:

[0083] When it is detected that the hybrid system is in the series mode, the discharge power generated by the battery pack in the hybrid vehicle and the power generated by the generator within 10 seconds are detected in real time;

[0084] The discharge power and the generation power are accumulated to calculate the available power of the whole vehicle system.

[0085] A fourth embodiment of the present invention provides a computer, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the vehicle hybrid mode switching energy control method as described above when executing the computer program.

[0086] A fifth embodiment of the present invention provides a readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the vehicle hybrid mode switching energy control method as described above is implemented.

[0087] In summary, the vehicle hybrid mode switching energy control method and system provided in the above embodiments of the present invention can accurately control the available power of the entire vehicle system, thereby enabling the vehicle to travel smoothly, thereby correspondingly improving the user experience.

[0088] It should be noted that the above modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0089] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0090] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0091] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A vehicle hybrid mode switching energy control method, characterized in that: The method comprises: When it is detected in real time that the hybrid vehicle is in a driving state, detecting in real time the working mode of the hybrid system in the hybrid vehicle; When it is detected in real time that the hybrid system is in the series mode, the available power of the whole vehicle system inside the hybrid vehicle is controlled in real time according to a first preset rule; When it is detected in real time that the hybrid system is in the series-to-parallel mode, the available power of the whole vehicle system inside the hybrid vehicle is controlled in real time according to a second preset rule; When it is detected in real time that the hybrid system is in the parallel mode, the available power of the entire vehicle system inside the hybrid vehicle is controlled in real time according to a third preset rule.

2. The vehicle hybrid mode switching energy control method according to claim 1, characterized in that: The step of controlling the available power of the entire vehicle system in the hybrid vehicle in real time according to a first preset rule when the hybrid system is detected in real time to be in the series mode comprises: When it is detected that the hybrid system is in the series mode, the discharge power allowed by the battery pack in the hybrid vehicle in 10 seconds and the power generation power of the generator are detected in real time; The discharge power and the generation power are accumulated to calculate the available power of the whole vehicle system.

3. The vehicle hybrid mode switching energy control method according to claim 2, characterized in that: The method further comprises: Real-time detection of the discharge power allowed by the battery pack in the hybrid vehicle within 2 seconds and the power generated by the generator; Accumulating the discharge power and the generation power to calculate the target available power value of the series-connected vehicle system; The available power of the whole vehicle system in the series mode is taken as the initial value, and the target value of the system available power of the series-cut and parallel mode is reached according to the filtering gradient to calculate the available power of the series-cut and parallel mode system.

4. The vehicle hybrid mode switching energy control method according to claim 3, characterized in that: The method further comprises: Real-time detection of the discharge power allowed by the battery pack in the hybrid vehicle in 10 seconds and the maximum available power of the engine, and accumulation of the discharge power and the maximum available power to calculate the target available power value of the parallel vehicle system; The available power of the whole vehicle system in the series-to-parallel mode is taken as the initial value, and the target value of the available power of the parallel system is calculated according to the filtering gradient to calculate the available power of the parallel system.

5. The vehicle hybrid mode switching energy control method according to claim 2, characterized in that: When the series-to-parallel mode of the hybrid vehicle ends, the hybrid vehicle is controlled to enter the parallel mode accordingly.

6. A vehicle hybrid mode switching energy control system, characterized in that: The system comprises: A detection module, configured to detect in real time the working mode of the hybrid system in the hybrid vehicle when it is detected in real time that the hybrid vehicle is in a driving state; A first processing module, configured to control the system available power inside the hybrid vehicle in real time according to a first preset rule when it is detected in real time that the hybrid system is in a series mode; A second processing module is used to control the system available power inside the hybrid vehicle in real time according to a second preset rule when it is detected in real time that the hybrid system is in a series-to-parallel mode; The third processing module is used to control the system available power inside the hybrid vehicle in real time according to a third preset rule when it is detected in real time that the hybrid system is in the parallel mode.

7. A computer comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the vehicle hybrid mode switching energy control method as described in any one of claims 1 to 7 is implemented.

8. A readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the vehicle hybrid mode switching energy control method as described in any one of claims 1 to 7 is implemented.

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