Vehicle heating control method, computer equipment, storage medium and program product

Abstract

The invention discloses a vehicle heating control method, computer equipment, a storage medium and a program product, and the method comprises the steps: obtaining a vehicle operation state, the vehicle running state comprises the initial output power of the positive temperature coefficient heater, the environment temperature, the battery charging state, the battery cell minimum temperature, the battery charge state and a limiting request signal of a vehicle control module to the positive temperature coefficient heater; and the target output power of the positive temperature coefficient heater is controlled according to the vehicle running state. By implementing the method, the target output power of the PTC is dynamically adjusted by comprehensively considering various working condition factors such as the initial power, the environment temperature, the battery charging state, the minimum temperature of the battery cell, the SOC, the battery charging state and the limiting request of the vehicle control module, large current impact is avoided, the comfort in the vehicle is ensured, the service life of the battery is effectively prolonged, and the safety of the battery is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to a vehicle heating control method, computer equipment, storage medium, and program product. Background Technology

[0002] In hybrid and pure electric vehicles, the positive temperature coefficient (PTC) heater is a crucial heat source for in-vehicle heating in winter. Existing control methods typically employ pulse width modulation (PWM) control technology to regulate blower speed, primarily by adjusting the duty cycle. However, during the development of this invention, the inventors discovered that existing control methods, due to large current surges, can easily damage the power battery at low temperatures. Furthermore, these methods rely solely on in-vehicle temperature or air conditioning requests, failing to adequately consider battery status, charging mode, and ambient temperature, potentially leading to over-discharge or inefficient thermal management, impacting in-vehicle comfort and battery safety. Therefore, a PTC heating control method that comprehensively considers multiple operating conditions is urgently needed to improve energy efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies that use PWM control to control PTC current surges, which can easily damage the power battery, and to provide a vehicle heating control method, computer equipment, storage medium, and program product.

[0004] The technical solution of the present invention provides a vehicle heating control method, comprising: The vehicle operating status is obtained, including the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, battery state of charge, and the vehicle control module's limit request signal for the positive temperature coefficient heater. The target output power of the positive temperature coefficient heater is controlled according to the vehicle's operating status.

[0005] In one of the alternative technical solutions, controlling the target output power of the positive temperature coefficient heater according to the vehicle operating state includes: If the initial output power is less than the first preset power threshold, or the ambient temperature is greater than or equal to the first preset temperature threshold, or the battery charging state is non-charging state, or the minimum cell temperature is less than or equal to the second preset temperature threshold, or the battery state of charge is less than or equal to the preset charge threshold, or the restriction request signal is an unrestricted request, the target output power is controlled to be the initial output power.

[0006] In one alternative technical solution, the vehicle operating status further includes environmental load, real-time air outlet temperature of the vehicle's air conditioning system, and the upper limit of the output power of the positive temperature coefficient heater. Controlling the target output power of the positive temperature coefficient heater based on the vehicle operating status includes: The target air outlet temperature of the vehicle's air conditioning system is determined based on the environmental load. Calculate the temperature difference between the target outlet air temperature and the real-time outlet air temperature; If the initial output power is greater than a first preset power threshold, the ambient temperature is less than a first preset temperature threshold, the battery is in a charging state, the minimum cell temperature is greater than a second preset temperature threshold, the battery state of charge is greater than a preset charge threshold, and the limit request signal is a limit request, the target output power is controlled according to the temperature difference and the upper limit of the output power.

[0007] In one alternative technical solution, controlling the target output power based on the temperature difference and the upper limit of output power includes: If the temperature difference is less than or equal to the third preset temperature threshold, and the upper limit of the output power is greater than or equal to the first preset power threshold, the target output power is controlled to the first level. If the temperature difference is less than or equal to the third preset temperature threshold, the upper limit of the output power is greater than or equal to the second preset power threshold, and the upper limit of the output power is less than the first preset power threshold, the target output power is controlled to the second level. If the temperature difference is less than or equal to the third preset temperature threshold, and the upper limit of the output power is less than the second preset power threshold, the target output power is controlled to the third level.

[0008] In one alternative technical solution, controlling the target output power based on the temperature difference and the upper limit of output power includes: If the temperature difference is greater than or equal to the fourth preset temperature threshold, the target output power is controlled to the third level. If the temperature difference is greater than the third preset temperature threshold and less than the fourth preset temperature threshold, and the upper limit of the output power is greater than or equal to the first preset power threshold, the target output power is controlled to the first level. If the temperature difference is greater than the third preset temperature threshold and less than the fourth preset temperature threshold, and the upper limit of the output power is less than the first preset power threshold, the target output power is controlled to the third level.

[0009] In one alternative technical solution, the positive temperature coefficient heater includes a driver's side positive temperature coefficient heater and a passenger side positive temperature coefficient heater, and the step of controlling the target output power based on the temperature difference and the upper limit of output power includes: If the temperature difference is less than or equal to a third preset temperature threshold and the upper limit of the output power is greater than or equal to a first preset power threshold, or if the temperature difference is less than or equal to the third preset temperature threshold, the upper limit of the output power is greater than or equal to a second preset power threshold and the upper limit of the output power is less than the first preset power threshold, the target output power of the driver's side positive temperature coefficient heater is controlled to the first level, and the target output power of the passenger side positive temperature coefficient heater is controlled to the second level. If the temperature difference is less than or equal to the third preset temperature threshold, and the upper limit of the output power is less than the second preset power threshold, the target output power of both the driver's side positive temperature coefficient heater and the passenger side positive temperature coefficient heater is controlled to be at the third level.

[0010] In one alternative technical solution, controlling the target output power based on the temperature difference and the upper limit of output power includes: If the temperature difference is greater than or equal to the fourth preset temperature threshold, or if the temperature difference is greater than the third preset temperature threshold but less than the fourth preset temperature threshold, and the upper limit of the output power is less than the first preset power threshold, the target output power of the driver's side positive temperature coefficient heater and the passenger side positive temperature coefficient heater are both controlled to the third level. If the temperature difference is greater than the third preset temperature threshold and less than the fourth preset temperature threshold, and the upper limit of the output power is greater than or equal to the first preset power threshold, the target output power of the driver's side positive temperature coefficient heater is controlled to the first level, and the target output power of the passenger side positive temperature coefficient heater is controlled to the second level.

[0011] In one alternative technical solution, the step of controlling the target output power of the positive temperature coefficient heater according to the vehicle operating state further includes: Send the flag bit of the positive temperature coefficient heater.

[0012] In one of the alternative technical solutions, the flag indicating the setting of the positive temperature coefficient heater includes: If the target output power is controlled to be the initial output power, then the flag bit is sent to 0; If the target output power is controlled to the first, second, or third level, the flag bit is sent as 1.

[0013] The present invention also provides a computer device, including a memory, a processor, and a computer program on the memory. The processor executes the computer program to implement the steps of any of the aforementioned vehicle heating control methods.

[0014] The present invention also provides a computer-readable storage medium having a computer program / instruction stored thereon. When the computer program / instructions are executed by the processor, they implement the steps of any of the aforementioned vehicle heating control methods.

[0015] The present invention also provides a computer program product, including a computer program / instructions. When the computer program / instructions are executed by the processor, they implement the steps of any of the aforementioned vehicle heating control methods.

[0016] The above technical solution has the following beneficial effects: By acquiring the vehicle's operating status, including the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, battery state of charge, and the limitation request signal from the vehicle control module to the positive temperature coefficient heater, and controlling the target output power of the positive temperature coefficient heater according to the vehicle's operating status, the target output power of the PTC is dynamically adjusted by comprehensively considering various operating conditions such as initial power, ambient temperature, battery charging status, minimum cell temperature, SOC, battery charging status, and limitation requests from the vehicle control module. This avoids large current surges, ensures in-vehicle comfort, and effectively improves battery life and safety. Attached Figure Description

[0017] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings: Figure 1 A flowchart illustrating a vehicle heating control method according to an embodiment of the present invention; Figure 2 This is a flowchart of the steps for controlling the target output power of the positive temperature coefficient heater according to the vehicle operating state in one embodiment of the present invention; Figure 3 This is a flowchart of the steps for controlling the target output power based on the temperature difference and the upper limit of output power in one embodiment of the present invention; Figure 4 This is a flowchart illustrating the steps of controlling the target output power based on the temperature difference and the upper limit of output power in another embodiment of the present invention; Figure 5 This is a schematic diagram of the hardware structure of a computer device for vehicle heating control according to an embodiment of the present invention. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0019] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0020] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a vehicle heating control method, comprising: Step S101: Obtain the vehicle operating status, which includes the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, battery state of charge, and the vehicle control module's limit request signal for the positive temperature coefficient heater. Step S102: Control the target output power of the positive temperature coefficient heater according to the vehicle operating status.

[0022] Specifically, the present invention can be applied to electronic devices with processing capabilities, such as vehicle controllers, such as the vehicle's Electronic Control Unit (ECU).

[0023] In step S101, the ECU obtains the vehicle's operating status in real time through the Controller Area Network (CAN) bus, including the initial output power of the PTC, ambient temperature, battery charging status, minimum cell temperature, battery state of charge (SOC), and the vehicle control module's (VCM) limit requests to the PTC.

[0024] The initial output power can be calculated based on the vehicle's air conditioning system.

[0025] The battery charging status can be obtained through the working mode of the Battery Management System (BMS) sent by the VCM. When the working mode of the BMS is 00, it means disconnection; when the working mode of the BMS is 01, it means normal power supply; when the working mode of the BMS is 02, it means fast charging; and when the working mode of the BMS is 03, it means normal charging.

[0026] Among them, the VCM's restriction request to the PTC refers to the VCM's restriction request to the PTC due to fast charging current fluctuations. "Unrestricted request" and "restricted request" can be obtained through the flag signal issued by the VCM.

[0027] In step S102, the target output power of the PTC is controlled according to the vehicle's operating status, thereby dynamically adjusting the target output power of the PTC by comprehensively considering various operating conditions, avoiding damage to the battery from large current surges, ensuring in-vehicle comfort, and effectively improving battery life and safety.

[0028] In this embodiment, by acquiring the vehicle's operating status, including the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, battery state of charge, and the limitation request signal from the vehicle control module to the positive temperature coefficient heater, the target output power of the positive temperature coefficient heater is controlled according to the vehicle's operating status. This achieves dynamic adjustment of the PTC's target output power by comprehensively considering various operating conditions such as initial power, ambient temperature, battery charging status, minimum cell temperature, SOC, battery charging status, and limitation requests from the vehicle control module. This avoids large current surges, ensures in-vehicle comfort, and effectively improves battery life and safety.

[0029] like Figure 2 As shown, based on the above embodiments, another embodiment of the present invention provides a vehicle heating control method, comprising: Step S201: Obtain vehicle operating status; Step S202: Determine whether the initial output power is greater than or equal to the first preset power threshold; Step S203: Determine whether the ambient temperature is lower than the first preset temperature threshold; Step S204: Determine whether the battery is in a charging state; Step S205: Determine whether the minimum temperature of the battery cell is greater than the second preset temperature threshold; Step S206: Determine whether the battery state of charge is greater than a preset power threshold; Step S207: Determine whether the restriction request signal is a restriction request; Step S208: Control the target output power to the initial output power; Step S209: Determine the target air outlet temperature of the vehicle air conditioner based on the environmental load; Step S210: Calculate the temperature difference between the target outlet air temperature and the real-time outlet air temperature; Step S211: Control the target output power according to the temperature difference and the upper limit of the output power.

[0030] Specifically, in step S202, it is determined whether the initial output power is greater than or equal to a first preset power threshold. If so, step S203 is executed; otherwise, step S208 is executed. The first preset power threshold can be set according to user requirements; preferably, it is 200W.

[0031] In step S203, it is determined whether the ambient temperature is lower than a first preset temperature threshold. If so, step S204 is executed; otherwise, step S208 is executed. The first preset temperature threshold can be set according to user requirements; preferably, it is 20°C.

[0032] In step S204, it is determined whether the battery is in a charging state. If it is, step S205 is executed; otherwise, step S208 is executed.

[0033] In step S205, it is determined whether the minimum temperature of the battery cell is greater than a second preset temperature threshold. If so, step S206 is executed; otherwise, step S208 is executed. The second preset temperature threshold can be set according to user requirements; preferably, it is -30℃.

[0034] In step S206, it is determined whether the battery state of charge is greater than a preset power threshold. If so, step S207 is executed; otherwise, step S208 is executed. The preset power threshold can be set according to user needs; preferably, it is 95%.

[0035] In step S207, it is determined whether the restriction request signal is a restriction request. If it is, step S209 is executed; otherwise, step S208 is executed.

[0036] It should be understood that the sequence number of each step in steps S201-S207 does not imply the order of execution. The execution order of each process should be determined by its function and memory logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. For example, the corresponding steps can be executed according to the order in which the vehicle operating status is received, or two or more corresponding steps can be executed simultaneously.

[0037] In step S209, the vehicle operating status also includes the environmental load, the real-time air outlet temperature of the vehicle's air conditioning system, and the upper limit of the output power of the positive temperature coefficient heater. The environmental load and real-time air outlet temperature can be calculated by the vehicle's air conditioning system sensors detecting the temperature difference between the inside and outside of the vehicle and the operating status of the fan; the upper limit of the output power can be dynamically provided by the BMS based on the battery status. The target air outlet temperature of the vehicle's air conditioning system is determined based on the environmental load. For example, the air outlet temperature corresponding to each environmental load can be obtained as the target air outlet temperature by querying a preset environmental load-air outlet temperature curve.

[0038] In step S210, the real-time outlet air temperature is subtracted from the target outlet air temperature to obtain the temperature difference.

[0039] In step S211, the target output power is controlled based on the temperature difference and the upper limit of the output power.

[0040] In this embodiment, by comprehensively considering various operating conditions such as the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, SOC, the vehicle control module's limit request signal for the positive temperature coefficient heater, environmental load, the real-time air outlet temperature of the vehicle's air conditioning, and the upper limit of the positive temperature coefficient heater's output power, the target output power of the PTC is dynamically adjusted, avoiding large current surges, ensuring in-vehicle comfort, and effectively improving battery life and safety.

[0041] like Figure 3 As shown, controlling the target output power based on the temperature difference and the upper limit of output power includes: Step S301: Determine whether the temperature difference is less than or equal to a third preset temperature threshold; Step S302: Determine whether the temperature difference is greater than or equal to the fourth preset temperature threshold; Step S303: Determine whether the upper limit of the output power is greater than or equal to the first preset power threshold; Step S304: Determine whether the upper limit of the output power is greater than or equal to the second preset power threshold; Step S305: Control the target output power to the first level; Step S306: Control the target output power to the second level; Step S307: Control the target output power to the third level.

[0042] Specifically, in step S301, it is determined whether the temperature difference is less than or equal to a third preset temperature threshold. If so, step S303 is executed; otherwise, step S302 is executed. The third preset temperature threshold can be set according to user requirements, and is preferably -1℃ in this invention.

[0043] In step S302, it is determined whether the temperature difference is greater than or equal to a fourth preset temperature threshold. If so, step S305 is executed; otherwise, step S307 is executed. The fourth preset temperature threshold can be set according to user needs, and the fourth preset temperature threshold of the present invention is preferably 1℃.

[0044] In step S303, it is determined whether the upper limit of the output power is greater than or equal to the first preset power threshold. If so, step S305 is executed; otherwise, step S304 is executed. The first preset power threshold can be set according to user requirements; preferably, it is 5000W.

[0045] In step S304, it is determined whether the upper limit of the output power is greater than or equal to the second preset power threshold. If so, step S306 is executed; otherwise, step S307 is executed. The second preset power threshold can be set according to user requirements; preferably, it is 2500W.

[0046] The first, second, and third speed settings can be configured according to user needs. These settings can be different or the same. Preferably, the first speed setting is 2600W, the second speed setting is 2600W, and the third speed setting is 0W (i.e., PTC is off, no heating).

[0047] In this embodiment, by taking into account factors such as temperature difference and upper limit of output power, the target output power of the PTC is controlled in stages. This can quickly meet the heating needs of the vehicle interior while ensuring battery safety, improve in-vehicle comfort, and effectively enhance battery life and safety.

[0048] like Figure 4 As shown, the positive temperature coefficient heater includes a driver's side positive temperature coefficient heater and a passenger side positive temperature coefficient heater. The step of controlling the target output power based on the temperature difference and the upper limit of the output power includes: Step S401: Determine whether the temperature difference is less than or equal to a third preset temperature threshold; Step S402: Determine whether the temperature difference is greater than or equal to the fourth preset temperature threshold; Step S403: Determine whether the upper limit of the output power is greater than or equal to the first preset power threshold; Step S404: Determine whether the upper limit of the output power is greater than or equal to the second preset power threshold; Step S405: Control the target output power of the driver's side positive temperature coefficient heater to the first level, and control the target output power of the passenger side positive temperature coefficient heater to the second level; Step S406: Control the target output power of both the driver's side positive temperature coefficient heater and the passenger side positive temperature coefficient heater to the third level.

[0049] Specifically, in step S401, it is determined whether the temperature difference is less than or equal to a third preset temperature threshold. If so, step S403 is executed; otherwise, step S402 is executed. The third preset temperature threshold can be set according to user requirements, and is preferably -1℃ in this invention.

[0050] In step S402, it is determined whether the temperature difference is greater than or equal to a fourth preset temperature threshold. If so, step S406 is executed; otherwise, step S403 is executed. The fourth preset temperature threshold can be set according to user needs, and the fourth preset temperature threshold of the present invention is preferably 1°C.

[0051] In step S403, it is determined whether the upper limit of the output power is greater than or equal to the first preset power threshold. If so, step S405 is executed; otherwise, step S404 is executed. The first preset power threshold can be set according to user requirements; preferably, the first preset power threshold of this invention is 5000W.

[0052] In step S404, it is determined whether the upper limit of the output power is greater than or equal to the second preset power threshold. If so, step S405 is executed; otherwise, step S406 is executed. The second preset power threshold can be set according to user requirements; preferably, it is 2500W.

[0053] The first, second, and third speed settings can be configured according to user needs. These settings can be different or the same. Preferably, the first speed setting is 2600W, the second speed setting is 2600W, and the third speed setting is 0W (i.e., PTC is off, no heating).

[0054] In this embodiment, by considering factors such as temperature difference and upper limit of output power, the target output power of the PTC in the driver and passenger seats is controlled in stages. This allows the target output power of the PTC in the driver and passenger seats to be applicable to existing PWM control methods, improving compatibility. Under the premise of ensuring battery safety, it can quickly meet the heating needs of the vehicle interior, improve in-vehicle comfort, and effectively enhance battery life and safety.

[0055] In one embodiment, the step of controlling the target output power of the positive temperature coefficient heater according to the vehicle operating state further includes: Send the flag bit of the positive temperature coefficient heater.

[0056] Specifically, the PTC's flag bit is initially set to 0. The flag bit can be sent via the CAN bus. For example, a one-byte signal can be sent via the CAN bus, where bit 0 represents the Flag (0 = initial power, 1 = gear power). By sending the flag bit, the vehicle controller can understand the PTC's operating status.

[0057] In one embodiment, the flag indicating the setting of the positive temperature coefficient heater includes: If the target output power is controlled to be the initial output power, then the flag bit is sent to 0; If the target output power is controlled to the first, second, or third level, the flag bit is sent as 1.

[0058] In this embodiment, by sending different flag bits, the vehicle controller can understand the operating status of the PTC.

[0059] like Figure 5 As shown, a hardware structure diagram of an electronic device for vehicle heating control according to an embodiment of the present invention includes: At least one processor 501; and, Memory 502 is communicatively connected to at least one processor 501; wherein, The memory 502 stores instructions that can be executed by at least one processor 501, which enables the at least one processor 501 to perform the vehicle heating control method as described in any of the above method embodiments.

[0060] Figure 5 Take a processor 501 as an example.

[0061] The electronic device is preferably an electronic control unit (ECU).

[0062] The electronic device may also include an input device 503 and an output device 504.

[0063] The processor 501, memory 502, input device 503 and output device 504 can be connected by a bus or other means. The figure shows an example of connection by bus.

[0064] The memory 502, as a non-volatile computer-readable storage medium, can be used to obtain non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the vehicle heating control method in the embodiments of this application, for example, Figures 1-4The method flow is shown. The processor 501 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules acquired in the memory 502, thereby realizing the vehicle heating control method in the above embodiments.

[0065] Memory 502 may include a program acquisition area and a data acquisition area, wherein the program acquisition area may acquire the operating system and applications required for at least one function; the data acquisition area may acquire data created based on the use of the vehicle heating control method, etc. Furthermore, memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 502 may optionally include memory remotely located relative to processor 501, and these remote memories may be connected via a network to the apparatus performing the vehicle heating control method. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0066] The input device 503 can receive user clicks and generate signal inputs related to user settings and function control of the vehicle heating control method. The output device 504 may include a display screen or other display device.

[0067] When the one or more modules are accessed in the memory 502 and are run by the one or more processors 501, the vehicle heating control method in any of the above method embodiments is executed.

[0068] The above-described product can perform the methods provided in the embodiments of this application, and has the corresponding functional modules and beneficial effects for performing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in the embodiments of this application.

[0069] In this embodiment, by acquiring the vehicle's operating status, including the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, battery state of charge, and the limitation request signal from the vehicle control module to the positive temperature coefficient heater, the target output power of the positive temperature coefficient heater is controlled according to the vehicle's operating status. This achieves dynamic adjustment of the PTC's target output power by comprehensively considering various operating conditions such as initial power, ambient temperature, battery charging status, minimum cell temperature, SOC, battery charging status, and limitation requests from the vehicle control module. This avoids large current surges, ensures in-vehicle comfort, and effectively improves battery life and safety.

[0070] One embodiment of the present invention provides a computer-readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, implements the steps of any of the aforementioned vehicle heating control methods.

[0071] In the context of this disclosure, a storage medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. The storage medium can be a machine-readable signal medium or a machine-readable storage medium. Optionally, the storage medium can be a non-transitory computer-readable storage medium, such as a ROM, random access memory (RAM), compact disc ROM (CD-ROM), magnetic tape, floppy disk, and optical data storage device.

[0072] In this embodiment, by acquiring the vehicle's operating status, including the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, battery state of charge, and the limitation request signal from the vehicle control module to the positive temperature coefficient heater, the target output power of the positive temperature coefficient heater is controlled according to the vehicle's operating status. This achieves dynamic adjustment of the PTC's target output power by comprehensively considering various operating conditions such as initial power, ambient temperature, battery charging status, minimum cell temperature, SOC, battery charging status, and limitation requests from the vehicle control module. This avoids large current surges, ensures in-vehicle comfort, and effectively improves battery life and safety.

[0073] One embodiment of the present invention provides a computer program product, including a computer program / instructions, which, when executed by a processor, implement the steps of any of the aforementioned vehicle heating control methods.

[0074] In this embodiment, by acquiring the vehicle's operating status, including the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, battery state of charge, and the limitation request signal from the vehicle control module to the positive temperature coefficient heater, the target output power of the positive temperature coefficient heater is controlled according to the vehicle's operating status. This achieves dynamic adjustment of the PTC's target output power by comprehensively considering various operating conditions such as initial power, ambient temperature, battery charging status, minimum cell temperature, SOC, battery charging status, and limitation requests from the vehicle control module. This avoids large current surges, ensures in-vehicle comfort, and effectively improves battery life and safety.

[0075] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle heating control method, characterized in that, include: The vehicle operating status is obtained, including the initial output power of the positive temperature coefficient heater, ambient temperature, battery charging status, minimum cell temperature, battery state of charge, and the vehicle control module's limit request signal for the positive temperature coefficient heater. The target output power of the positive temperature coefficient heater is controlled according to the vehicle's operating status.

2. The vehicle heating control method as described in claim 1, characterized in that, The step of controlling the target output power of the positive temperature coefficient heater according to the vehicle operating state includes: If the initial output power is less than the first preset power threshold, or the ambient temperature is greater than or equal to the first preset temperature threshold, or the battery charging state is non-charging state, or the minimum cell temperature is less than or equal to the second preset temperature threshold, or the battery state of charge is less than or equal to the preset charge threshold, or the restriction request signal is an unrestricted request, the target output power is controlled to be the initial output power.

3. The vehicle heating control method as described in claim 1, characterized in that, The vehicle operating status also includes environmental load, real-time air outlet temperature of the vehicle's air conditioning, and the upper limit of the output power of the positive temperature coefficient heater. Controlling the target output power of the positive temperature coefficient heater based on the vehicle operating status includes: The target air outlet temperature of the vehicle's air conditioning system is determined based on the environmental load. Calculate the temperature difference between the target outlet air temperature and the real-time outlet air temperature; If the initial output power is greater than a first preset power threshold, the ambient temperature is less than a first preset temperature threshold, the battery is in a charging state, the minimum cell temperature is greater than a second preset temperature threshold, the battery state of charge is greater than a preset charge threshold, and the limit request signal is a limit request, the target output power is controlled according to the temperature difference and the upper limit of the output power.

4. The vehicle heating control method as described in claim 3, characterized in that, The step of controlling the target output power based on the temperature difference and the upper limit of output power includes: If the temperature difference is less than or equal to the third preset temperature threshold, and the upper limit of the output power is greater than or equal to the first preset power threshold, the target output power is controlled to the first level. If the temperature difference is less than or equal to the third preset temperature threshold, the upper limit of the output power is greater than or equal to the second preset power threshold, and the upper limit of the output power is less than the first preset power threshold, the target output power is controlled to the second level. If the temperature difference is less than or equal to the third preset temperature threshold, and the upper limit of the output power is less than the second preset power threshold, the target output power is controlled to the third level.

5. The vehicle heating control method as described in claim 4, characterized in that, The step of controlling the target output power based on the temperature difference and the upper limit of output power includes: If the temperature difference is greater than or equal to the fourth preset temperature threshold, the target output power is controlled to the third level. If the temperature difference is greater than the third preset temperature threshold and less than the fourth preset temperature threshold, and the upper limit of the output power is greater than or equal to the first preset power threshold, the target output power is controlled to the first level. If the temperature difference is greater than the third preset temperature threshold and less than the fourth preset temperature threshold, and the upper limit of the output power is less than the first preset power threshold, the target output power is controlled to the third level.

6. The vehicle heating control method as described in claim 3, characterized in that, The positive temperature coefficient heater includes a driver's side positive temperature coefficient heater and a passenger side positive temperature coefficient heater. Controlling the target output power based on the temperature difference and the upper limit of the output power includes: If the temperature difference is less than or equal to a third preset temperature threshold and the upper limit of the output power is greater than or equal to a first preset power threshold, or if the temperature difference is less than or equal to the third preset temperature threshold, the upper limit of the output power is greater than or equal to a second preset power threshold and the upper limit of the output power is less than the first preset power threshold, the target output power of the driver's side positive temperature coefficient heater is controlled to the first level, and the target output power of the passenger side positive temperature coefficient heater is controlled to the second level. If the temperature difference is less than or equal to the third preset temperature threshold, and the upper limit of the output power is less than the second preset power threshold, the target output power of both the driver's side positive temperature coefficient heater and the passenger side positive temperature coefficient heater is controlled to be at the third level.

7. The vehicle heating control method as described in claim 6, characterized in that, The step of controlling the target output power based on the temperature difference and the upper limit of output power includes: If the temperature difference is greater than or equal to the fourth preset temperature threshold, or if the temperature difference is greater than the third preset temperature threshold but less than the fourth preset temperature threshold, and the upper limit of the output power is less than the first preset power threshold, the target output power of the driver's side positive temperature coefficient heater and the passenger side positive temperature coefficient heater are both controlled to the third level. If the temperature difference is greater than the third preset temperature threshold and less than the fourth preset temperature threshold, and the upper limit of the output power is greater than or equal to the first preset power threshold, the target output power of the driver's side positive temperature coefficient heater is controlled to the first level, and the target output power of the passenger side positive temperature coefficient heater is controlled to the second level.

8. The vehicle heating control method according to any one of claims 1-7, characterized in that, The step of controlling the target output power of the positive temperature coefficient heater according to the vehicle operating state further includes: Send the flag bit of the positive temperature coefficient heater.

9. The vehicle heating control method as described in claim 8, characterized in that, The flag indicating the setting of the positive temperature coefficient heater includes: If the target output power is controlled to be the initial output power, then the flag bit is sent to 0; If the target output power is controlled to the first, second, or third level, the flag bit is sent as 1.

10. A computer device, comprising a memory, a processor, and a computer program on the memory, characterized in that, The processor executes the computer program to implement the steps of the vehicle heating control method according to any one of claims 1-9.

11. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the vehicle heating control method according to any one of claims 1 to 9.

12. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the vehicle heating control method according to any one of claims 1-9.

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