Heat distribution control method, device and thermal management system for electric vehicles at low temperatures

Abstract

The present invention provides a method, device, and thermal management system for controlling heat distribution in electric vehicles at low temperatures. The method includes: obtaining heat distribution options, which include automatic and active distribution; determining whether the heat distribution option is active distribution, and if so, obtaining a first and second distribution ratio for the active distribution, the first and second distribution ratios being used to distribute heat to the battery and the air conditioner in the passenger compartment, and the first and second distribution ratios being user-adjustable; obtaining a battery heating request and the on / off status of the air conditioner in the passenger compartment; and performing heat distribution based on the battery heating request, the on / off status, the first and second distribution ratios. Heat distribution based on the user-adjustable first and second distribution ratios, as well as the battery heating request and the on / off status, provides more intelligent heat distribution, meets individual vehicle usage habits, and enhances the user experience.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of electric vehicles, and in particular to a method and device for controlling heat distribution in electric vehicles at low temperatures, a thermal management system, and a computer-readable medium. Background Art

[0002] Electric vehicles are the current trend in the automotive industry. Electric vehicles replace engines with electric motors, with the powertrain consisting of a motor and batteries. However, electric vehicle batteries are subject to limitations in low-temperature environments, resulting in, for example, slower charging speeds and poorer discharge performance. Therefore, battery heating is necessary to maintain performance in low-temperature environments. Simultaneously, passenger compartment heating is also necessary to ensure passenger comfort. If both battery heating and passenger compartment heating are required, the heat must be distributed, with some going to the batteries and some going to the passenger compartment.

[0003] Existing heat distribution control methods use a fixed heat distribution ratio, which cannot be adjusted after the vehicle leaves the factory. For users with different driving scenarios and different habits, if the distribution ratio does not meet their driving habits, it will cause complaints. For example, if the battery heating ratio is low and the passenger compartment air conditioning ratio is high, customers will complain about slow charging and short driving range; if the battery heating ratio is high and the passenger compartment air conditioning ratio is low, customers will complain about a cold passenger compartment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a heat distribution control method, device and thermal management system for electric vehicles at low temperatures, in which the user can independently adjust the heat distribution ratio.

[0005] To solve the above technical problems, the present invention provides a method for controlling heat distribution in electric vehicles at low temperatures, comprising: obtaining heat distribution options, the heat distribution options including automatic distribution and active distribution; determining whether the heat distribution option is the active distribution, and if so, obtaining a first distribution ratio and a second distribution ratio for the active distribution, the first distribution ratio and the second distribution ratio being adjustable by the user; obtaining a battery heating request and a switch status of the air conditioner in the passenger compartment; and performing heat distribution according to the battery heating request, the switch status, the first distribution ratio, and the second distribution ratio.

[0006] Optionally, distributing heat according to the battery heating request, the switch state, the first distribution ratio, and the second distribution ratio includes: determining whether the switch state is on or off, and if off, distributing all heat to the battery.

[0007] Optionally, the method further includes: if the switch state is on, determining whether the battery heating request is obtained; if not, allocating all heat to the air conditioner in the passenger compartment.

[0008] Optionally, it also includes: if the battery heating request is obtained, determining the category of the battery heating request, the category including a first heating request and a second heating request, the first heating request being a request generated when the battery is in a preheating stage, and the second heating request being a request generated when the battery is in a normal working stage; if it is the second heating request, allocating the first distribution ratio of heat to the battery, and allocating the second distribution ratio of heat to the air conditioner in the passenger compartment; if it is the first heating request, determining whether the first distribution ratio is lower than the lower limit ratio, and if so, allocating the lower limit ratio of heat to the battery, and allocating the remaining heat to the air conditioner in the passenger compartment.

[0009] Optionally, it also includes: if the first distribution ratio is not lower than a lower limit ratio, the heat of the first distribution ratio is distributed to the battery, and the heat of the second distribution ratio is distributed to the air conditioner in the passenger compartment.

[0010] Optionally, it also includes: if the heat allocation option is the automatic allocation, obtaining the third allocation ratio and the fourth allocation ratio of the automatic allocation, and the third allocation ratio and the fourth allocation ratio cannot be adjusted by the user; obtaining the battery status, the battery status including the charging status, the discharging status and the charging and discharging status; and performing heat allocation according to the battery heating request, the switch status, the battery status, the third allocation ratio and the fourth allocation ratio.

[0011] Optionally, distributing heat according to the battery heating request, the switch state, the battery state, the third distribution ratio and the fourth distribution ratio includes: when the switch state is on and the battery heating request is obtained, judging whether the battery state is in a discharge state, and if not, distributing the heat of the third distribution ratio to the battery, and distributing the heat of the fourth distribution ratio to the air conditioner in the passenger compartment; if not, distributing the heat of the fourth distribution ratio to the battery, and distributing the heat of the third distribution ratio to the air conditioner in the passenger compartment; wherein the third distribution ratio is higher than the fourth distribution ratio.

[0012] To solve the above technical problems, the present invention provides a heat distribution control device for an electric vehicle at low temperatures, comprising: a memory for storing instructions executable by a processor; and a processor for executing the instructions to implement any of the methods described above.

[0013] In order to solve the above technical problems, the present invention provides an automobile thermal management system, characterized in that it includes: an air-conditioning controller, used to execute the method described in any one of the above items; a cabin domain controller, used to send heat distribution options and the ratio of the heat distribution options; a battery management system, used to determine whether to send a battery heating request to the control device based on the battery temperature, and send the battery status to the communication module; a communication module, which is respectively communicated with the control device, the cabin domain controller and the battery management system, and the communication module is used to forward the heat distribution options, the ratio of the heat distribution options and the battery status to the control device.

[0014] Optionally, the battery management system is also used to: determine whether the battery temperature is lower than a first temperature threshold, and if so, send a first heating request; if the battery temperature is higher than the first temperature threshold and lower than a second temperature threshold, send a second heating request; if the battery temperature is higher than the second temperature threshold, do not send the battery heating request.

[0015] To solve the above technical problem, the present invention provides a computer-readable medium storing computer program code, wherein the computer program code implements the method according to any one of claims 1 to 9 when executed by a processor.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The present invention's low-temperature heat distribution control method, device, and thermal management system for electric vehicles distributes heat based on user-adjustable first and second allocation ratios, as well as battery heating requests and on / off status. This intelligently tailors heat distribution to individual vehicle usage habits and enhances the user experience. Furthermore, by determining the type of battery heating request and the lower limit ratio, the present invention ensures that the minimum required heat is allocated to the battery during the preheating phase. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, are incorporated into and constitute a part of this application, illustrate embodiments of the present application, and together with this specification serve to explain the principles of the present invention. In the accompanying drawings:

[0019] Figure 1 is a system block diagram of an automotive thermal management system according to an embodiment of the present invention;

[0020] Figure 2 is a flow chart of a method for controlling heat distribution in low temperature conditions for an electric vehicle according to an embodiment of the present invention;

[0021] Figure 3 yes Figure 2 Flowchart of an embodiment of step S24;

[0022] Figure 4 yes Figure 3 A flowchart of an optimized embodiment;

[0023] Figure 5 yes Figure 2 Flowchart of the heat distribution control method for electric vehicles at low temperatures according to an optimized embodiment;

[0024] Figure 6 yes Figure 5 Flowchart of an embodiment of step S58;

[0025] Figure 7 This is a system block diagram of a heat distribution control device for an electric vehicle at low temperatures according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

[0027] Flowcharts are used in this application to illustrate the operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the various steps may be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0028] As noted in the background, existing heat distribution control methods use a fixed distribution ratio, which cannot be adjusted after the vehicle leaves the factory. For users with different usage habits and scenarios, if the distribution ratio does not meet their vehicle usage habits, it will cause complaints. The present invention provides a method, device, and thermal management system for controlling heat distribution in low-temperature conditions for electric vehicles, allowing users to adjust the heat distribution ratio.

[0029] Figure 1 FIG. 1 is a system block diagram of an automotive thermal management system according to an embodiment of the present invention. Figure 1As shown, the automotive thermal management system 100 includes a cabin domain controller 11, a battery management system 12, a communication module 13, and a heat distribution control device 14. The communication module 13 is connected to the heat distribution control device 14, the cabin domain controller 11, and the battery management system 12. Typically, the communication module 13 can be a TBOX (Telematics Box), and the heat distribution control device 14 can be an air conditioning controller. This application does not limit the types of the communication module 4 and the heat distribution control device 14.

[0030] The cockpit domain controller (CDC) 11 is the core control component of the smart cockpit. The smart cockpit includes multiple human-machine interaction modules, such as the central control display, passenger and rear seat entertainment screens, and a heads-up display (HUD). The CDC 11 receives data from these modules via Ethernet, MOST, CAN, and other communication channels, enabling a single controller to control multiple modules. Taking the central control display as an example, the display provides heat distribution options, including automatic and active. Selecting automatic distribution will distribute heat according to the automatic distribution ratio set at the factory. Selecting active distribution will display a slider switch. The left side of the slider is for battery heating, and the right side is for passenger compartment heating. The slider displays a scale of 0-100, allowing the user to adjust the heat distribution ratio. In some embodiments, the left side of the slider switch is for passenger compartment heating, and the right side is for battery heating; this is not a limitation of this application. The cockpit domain controller 11 obtains the heat distribution options and the ratio of the heat distribution options set by the central control display screen, and then sends the heat distribution options and the ratio of the heat distribution options to the communication module 13 in real time. The communication module 13 forwards the heat distribution options and the ratio of the heat distribution options to the heat distribution control device 14.

[0031] In some embodiments, the vehicle thermal management system further includes a user terminal, such as a smartphone or tablet computer. The user terminal is configured to transmit heat allocation options and their ratios to the communication module 13 . The communication module 13 then forwards the heat allocation options and their ratios to the heat allocation control device 14 . The user terminal and the cockpit domain controller 11 synchronize their status in real time via the communication module 13 .

[0032] The battery management system 12 is configured to determine whether to send a battery heating request to the heat distribution control device 14 based on the battery temperature. Optionally, the battery management system 12 determines whether the battery temperature is below a first temperature threshold. If so, it sends a first heating request. If the battery temperature is above the first temperature threshold and below a second temperature threshold, it sends a second heating request. If the battery temperature is above the second temperature threshold, it does not send a battery heating request. The second temperature threshold is higher than the first temperature threshold. When the battery temperature is below the first temperature threshold, the preheating phase begins. During the preheating phase, the battery cannot charge. The battery must be heated to a temperature above or equal to the first temperature threshold before it enters the normal operating phase. During the normal operating phase, the battery can charge, discharge, and charge-discharge simultaneously. For example, if the first temperature threshold is 0°C and the second temperature threshold is 25°C, the preheating phase begins when the battery temperature is below 0°C. Charging is prohibited until preheating is complete. Therefore, during the preheating phase, the driver is prohibited from setting a battery heating ratio lower than a lower limit. The lower limit can be 30%, but this is not a limitation in this application. Only after preheating is complete can the user set the normal ratio for distribution. The battery management system 12 determines whether the battery temperature is below 0°C. If so, it sends a first heating request to the heat distribution control device 14. If the battery temperature is above 0°C and below 25°C, a second heating request is sent. If the battery temperature is above 25°C, indicating that the battery does not need to be heated, the battery heating request is not sent. When a battery heating request needs to be sent, the battery management system 12 can send a battery heating request to the heat distribution control device 14 at a certain period. For example, the period can be 10 milliseconds, and the battery management system 12 sends a battery heating request to the heat distribution control device 14 every 10 milliseconds. The battery management system 12 is also used to send the battery status to the communication module 13. The battery status includes the charging state, the discharging state, and the charging and discharging state.

[0033] The communication module 13 is used to forward the heat distribution options, the ratio of the heat distribution options, and the battery status to the heat distribution control device 14 .

[0034] The heat distribution control device 14 distributes heat according to the heat distribution options and the ratio of the heat distribution options, the battery status, the battery heating request and the switch status of the air conditioner in the passenger compartment. Figure 2 .

[0035] Figure 2 FIG. 1 is a flow chart of a heat distribution control method for an electric vehicle at low temperatures according to an embodiment of the present invention. The heat distribution control method can be executed by the heat distribution control device 14. Figure 2 As shown, the heat distribution control method 200 includes the following steps:

[0036] Step S21: Obtain heat allocation options, which include automatic allocation and active allocation.

[0037] If you select automatic allocation, heat distribution will be based on the automatic allocation ratio set at the factory. If you select active allocation, a sliding switch will be displayed. The left side of the sliding switch is for battery heating, and the right side is for passenger compartment heating. The slider shows the ratio from 0-100%. The user can adjust the allocation ratio by sliding the switch.

[0038] Step S22: Determine whether the heat distribution option is active distribution. If so, obtain the first distribution ratio and the second distribution ratio of the active distribution. The first distribution ratio and the second distribution ratio are used to distribute heat to the battery and the air conditioner in the passenger compartment. The first distribution ratio and the second distribution ratio can be adjusted independently by the user.

[0039] After the user adjusts the sliding switch, the adjusted first allocation ratio and second allocation ratio are obtained. The sum of the first allocation ratio and the second allocation ratio is 100%. For example, the first allocation ratio can be 40% and the second allocation ratio can be 60%.

[0040] Step S23: Obtain the battery heating request and the on / off status of the air conditioner in the passenger compartment.

[0041] The passenger compartment air conditioning switch status includes on and off. When the passenger compartment air conditioning switch status is on, passenger compartment heating is required. When the passenger compartment air conditioning switch status is off, passenger compartment heating is not required. The passenger compartment air conditioning switch status can be represented by different signals, for example, 0 represents off and 1 represents on.

[0042] The battery heating request is generated by the battery management system based on the battery temperature. For example, the battery management system determines whether the battery temperature is lower than the first temperature threshold. If so, it sends a first heating request. If the battery temperature is higher than the first temperature threshold and lower than the second temperature threshold, it sends a second heating request; if the battery temperature is higher than the second temperature threshold, it does not send the battery heating request. The battery heating request can be obtained directly from the battery management system, or the battery management system can send the battery heating request to the communication module and obtain the battery heating request from the communication module. When the battery temperature is higher than the second temperature threshold, the battery management system does not send the battery heating request, and the battery heating request cannot be obtained, and there is no need to heat the battery.

[0043] Step S24: distributing heat according to the battery heating request, the switch state, the first distribution ratio, and the second distribution ratio.

[0044] Figure 3 yes Figure 2Flowchart of step S24 in an embodiment. Figure 3 As shown, step S24 includes the following steps:

[0045] Step S241: Determine whether the switch state is open or closed. If it is open, proceed to step S242; if it is closed, proceed to step S243.

[0046] Step S242: Determine whether a battery heating request is obtained. If not, proceed to step S244; if yes, proceed to step S245;

[0047] Step S243: Allocate all heat to the battery.

[0048] Step S244: Allocate all heat to the air conditioner in the passenger compartment.

[0049] Step S245: Allocate the heat of the first distribution ratio to the battery, and distribute the heat of the second distribution ratio to the air conditioner in the passenger compartment.

[0050] In steps S241 to S245, the switch state 0 represents off and 1 represents on. A determination is made as to whether the switch state is 0. If so, the cabin air conditioning is not on, and all heat is used to heat the battery. In some embodiments, when the switch state is off, all heat is used to heat the battery, but the cabin domain controller's human-computer interface module displays the user-set ratios, i.e., the first and second allocation ratios, and reminds the user that no heat is needed for the cabin. If the switch state is 1, i.e., on, a determination is made as to whether a battery heating request has been received. If no battery heating request has been received, all heat is allocated to the cabin air conditioning for cabin heating. In some embodiments, if the switch state is on and no battery heating request has been received, all heat is allocated to the cabin air conditioning for cabin heating, but the cabin domain controller's human-computer interface module displays the user-set ratios and reminds the user that no battery heating is currently required, and therefore all heat is used for the cabin. If a battery heating request has been received, the first allocation ratio is allocated to the battery, and the second allocation ratio is allocated to the cabin air conditioning. Taking the first distribution ratio of 40% and the second distribution ratio of 60% as an example, 40% of the heat is allocated to battery heating, and 60% of the heat is allocated to the air conditioner in the passenger compartment for heating the passenger compartment.

[0051] The electric vehicle heat distribution control method at low temperatures of the present invention distributes heat according to a first distribution ratio and a second distribution ratio that can be adjusted independently by the user, as well as a battery heating request and a switch state. The heat distribution is more intelligent, meets personal vehicle usage habits, and improves user experience.

[0052] Figure 4 yes Figure 3A flowchart of an optimized embodiment. Figure 4 As shown, step S24 also includes:

[0053] Step S24A: Determine the category of the battery heating request, which includes a first heating request and a second heating request. The first heating request is a request generated when the battery is in the preheating stage, and the second heating request is a request generated when the battery is in the normal working stage. If it is the second heating request, go to step S245; if it is the first heating request, go to step S246.

[0054] Step S246: Determine whether the first allocation ratio is lower than the lower limit ratio. If yes, proceed to step S247; if not, proceed to step S245.

[0055] Step S247: Allocate a lower limit proportion of heat to the battery, and distribute the remaining heat to the air conditioner in the passenger compartment.

[0056] In steps S24A to S247, the preheating phase begins when the battery temperature falls below a first threshold. Because charging is prohibited before preheating is complete, the driver is prohibited from setting a battery heating ratio lower than a lower limit during the preheating phase. The lower limit can be 30%, which is not a limitation in this application. Only after preheating is complete can the user set the ratio for normal distribution. If the battery temperature is below the first temperature threshold, a first heating request is issued. If the battery temperature is above the first temperature threshold and below a second temperature threshold, a second heating request is issued. If the battery temperature is above the second temperature threshold, no heating request is issued. If the first heating request is received, indicating the preheating phase, a determination is made as to whether the first distribution ratio is lower than the lower limit. If so, the lower limit of heat is allocated to the battery, and the remaining heat is allocated to the cabin air conditioning. For example, if the lower limit of heat is 30%, if the first distribution ratio is lower than 30%, 30% of the heat is allocated to the battery, and 70% of the heat is allocated to the cabin air conditioning. If the first allocation ratio is at least 30%, the first allocation ratio is allocated to the battery, and the second allocation ratio is allocated to the cabin air conditioning. For example, if the first allocation ratio is 40%, and the first allocation ratio is higher than the lower limit (40%>30%), 40% of the heat is allocated to the battery, and 60% of the heat is allocated to the cabin air conditioning. By determining the type of battery heating request and the lower limit ratio, the battery is guaranteed to receive the minimum required heat during the preheating phase, avoiding situations where the user-adjusted first allocation ratio is too low, resulting in prolonged battery charging failure.

[0057] Figure 5 yes Figure 2 Flowchart of the heat distribution control method for electric vehicles at low temperatures in the optimized embodiment. Figure 5As shown, the electric vehicle heat distribution control method 500 at low temperature includes:

[0058] Step S51: Obtain heat allocation options, which include automatic allocation and active allocation.

[0059] Step S52: Determine whether the heat distribution option is automatic distribution or active distribution. If it is active distribution, proceed to step S53; if it is automatic distribution, proceed to step S56.

[0060] Step S53: Obtain the first allocation ratio and the second allocation ratio that are actively allocated. The first allocation ratio and the second allocation ratio can be adjusted independently by the user.

[0061] Step S54: Obtain the battery heating request and the on / off status of the air conditioner in the passenger compartment.

[0062] Step S55: distributing heat according to the battery heating request, the switch state, the first distribution ratio, and the second distribution ratio.

[0063] Step S56: Obtaining the automatically allocated third and fourth allocation ratios, where the third and fourth allocation ratios are used to distribute heat to the battery and the air conditioner in the passenger compartment. The third and fourth allocation ratios cannot be adjusted by the user.

[0064] Step S57: Obtain the battery heating request, the on / off status of the air conditioner in the passenger compartment, and the battery status, where the battery status includes the charging status and the discharging status.

[0065] Step S58: distributing heat according to the battery heating request, the switch state, the battery state, the third distribution ratio, and the fourth distribution ratio.

[0066] The detailed description of steps S53 to S55 in which the heat distribution option is active distribution can be referred to Figure 2 The steps S21 to S24 are not described in detail here. This embodiment focuses on the steps S56 to S58 when the heat distribution option is automatic distribution.

[0067] The third and fourth allocation ratios in step S56 are pre-set before the vehicle leaves the factory and cannot be adjusted by the user after leaving the factory. Optionally, when the third allocation ratio is used for battery heating and the fourth allocation ratio is used for passenger compartment heating, the third allocation ratio is higher than the fourth allocation ratio. For example, the third allocation ratio is 70% and the fourth allocation ratio is 30%. This application does not impose any restrictions on the values of the third and fourth allocation ratios.

[0068] In step S57, the battery management system sends the battery status to the communication module, and the battery status can be obtained from the communication module. The battery status includes charging state, discharging state, and charging and discharging state.

[0069] Figure 6 yes Figure 5 Flowchart of step S58 in the embodiment. Figure 6 As shown, step S58 includes the following steps:

[0070] Step S581: Determine whether the switch state is on or off. If it is on, proceed to step S582; if it is off, proceed to step S585.

[0071] Step S582: Determine whether a battery heating request is obtained. If yes, proceed to step S583; if not, proceed to step S586.

[0072] Step S583: Determine whether the battery status is in a discharging state. If not, proceed to step S584; if yes, proceed to step S587.

[0073] Step S584: Allocate the heat of the third distribution ratio to the battery, and distribute the heat of the fourth distribution ratio to the air conditioner in the passenger compartment.

[0074] Step S585: Allocate all heat to the battery.

[0075] Step S586: Allocate all heat to the air conditioner in the passenger compartment.

[0076] Step S587: Allocate the heat of the fourth distribution ratio to the battery, and distribute the heat of the third distribution ratio to the air conditioner in the passenger compartment.

[0077] Steps S581 to S587 are described using a third allocation ratio of 70% and a fourth allocation ratio of 30% as an example. When the switch is off, indicating that the cabin air conditioning is not on, 100% of the heat is allocated to the battery for heating. When the switch is on and no battery heating request is received, 100% of the heat is allocated to the cabin air conditioning for heating. When the switch is on and a battery heating request is received, a determination is made as to whether the battery is in a discharging state. If so, indicating that both driving and cabin heating are being used simultaneously, 30% of the heat is allocated to the battery and 70% to the cabin air conditioning. If the battery is not in a discharging state, such as in a charging or simultaneous charging / discharging state, indicating that both charging and cabin heating are being used simultaneously, 70% of the heat is allocated to the battery and 30% to the cabin air conditioning. When both battery heating and passenger compartment heating are required, the third and fourth allocation ratios are switched based on the battery's state. During charging or simultaneous charging and discharging, more heat is allocated to the battery to quickly raise its temperature, improve charging efficiency, and reduce charging time. During battery discharge, more heat is allocated to the cabin air conditioning, raising the interior temperature in low-temperature environments and enhancing the user experience.

[0078] The present application also includes a heat distribution control device for an electric vehicle at low temperatures, comprising a memory and a processor. The memory is used to store instructions executable by the processor, and the processor is used to execute the instructions to implement the above-mentioned heat distribution control method for an electric vehicle at low temperatures.

[0079] Figure 7 This is a system block diagram of a heat distribution control device for electric vehicles at low temperatures according to an embodiment of the present application. Figure 7As shown, the heat distribution control device 700 may include an internal communication bus 701, a processor 702, a read-only memory (ROM) 703, a random access memory (RAM) 704, and a communication port 705. The internal communication bus 701 enables data communication between the components of the heat distribution control device 700. The processor 702 can make judgments and issue prompts. In some embodiments, the processor 702 can be composed of one or more processors. The communication port 705 enables data communication between the heat distribution control device 700 and the outside world. In some embodiments, the heat distribution control device 700 can send and receive information and data from a network via the communication port 705. The heat distribution control device 700 may also include various forms of program storage units and data storage units, such as a read-only memory (ROM) 703 and a random access memory (RAM) 704, which can store various data files used for computer processing and / or communication, as well as possible program instructions executed by the processor 702. The processor executes these instructions to implement the main part of the method. The results of the processor processing are transmitted to the user device via the communication port and displayed on the user interface.

[0080] The above-mentioned operating method can be implemented as a computer program, stored in a read-only memory (ROM) 703, and loaded into the processor 702 for execution to implement the heat distribution control method of the present application.

[0081] The present application also includes a computer-readable medium storing computer program code, which, when executed by a processor, implements the heat distribution control method described above.

[0082] When the heat distribution control method is implemented as a computer program, it can also be stored in a computer-readable storage medium as an article of manufacture. For example, computer-readable storage media can include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, magnetic strips), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs)), smart cards, and flash memory devices (e.g., electrically erasable programmable read-only memories (EPROMs), cards, sticks, key drives). In addition, the various storage media described herein can represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" can include, but is not limited to, wireless channels and various other media (and / or storage media) that can store, contain, and / or carry code and / or instructions and / or data.

[0083] It should be understood that the embodiments described above are merely illustrative. The embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For hardware implementation, the processor may be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and / or other electronic units designed to perform the functions described herein, or a combination thereof.

[0084] Some aspects of the present application can be performed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software can be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". The processor can be one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors or combinations thereof. In addition, various aspects of the present application may be expressed as computer products located in one or more computer-readable media, which include computer-readable program code. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, tapes...), optical disks (e.g., compact disks CDs, digital versatile disks DVDs...), smart cards, and flash memory devices (e.g., cards, sticks, key drives...).

[0085] A computer-readable medium may include a propagated data signal embodying computer program code, for example, in baseband or as part of a carrier wave. The propagated signal may be in a variety of forms, including electromagnetic, optical, etc., or a suitable combination thereof. A computer-readable medium may be any computer-readable medium other than a computer-readable storage medium that can be connected to an instruction execution system, apparatus, or device to communicate, propagate, or transmit the program for use. The program code on the computer-readable medium may be transmitted via any suitable medium, including radio, cable, fiber optic cable, radio frequency signal, or similar medium, or any combination of the above.

[0086] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. Furthermore, while the terms used in this application are selected from commonly known and commonly used terms, some terms mentioned in this specification may have been selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of this description. Furthermore, this application should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0087] Similarly, it should be noted that, in order to simplify the presentation of this application and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this application sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0088] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A method for controlling heat distribution in electric vehicles at low temperatures, characterized in that: include: Obtaining heat allocation options, where the heat allocation options include automatic allocation and active allocation; determining whether the heat distribution option is the active distribution, and if so, obtaining a first distribution ratio and a second distribution ratio of the active distribution, wherein the first distribution ratio and the second distribution ratio are used to distribute heat to the battery and the air conditioner in the passenger compartment, and the first distribution ratio and the second distribution ratio can be adjusted autonomously by the user; Obtain battery heating request and passenger compartment air conditioning switch status; distributing heat according to the battery heating request, the switch state, the first distribution ratio, and the second distribution ratio; Allocating heat according to the battery heating request, the switch state, the first allocation ratio, and the second allocation ratio includes: determining whether the switch state is on or off, and if off, allocating all heat to the battery; If the switch state is on, determining whether the battery heating request is obtained, and if not, distributing all heat to the air conditioner in the passenger compartment; If the battery heating request is obtained, determining a category of the battery heating request, where the category includes a first heating request and a second heating request, where the first heating request is generated when the battery is in a preheating stage, and the second heating request is generated when the battery is in a normal operating stage; If it is the second heating request, allocating the heat of the first distribution ratio to the battery and allocating the heat of the second distribution ratio to the air conditioner in the passenger compartment; If the request is the first heating request, determining whether the first distribution ratio is lower than a lower limit ratio, and if so, distributing the heat of the lower limit ratio to the battery and distributing the remaining heat to the air conditioner in the passenger compartment; If the heat allocation option is the automatic allocation, the method further includes: obtaining a third allocation ratio and a fourth allocation ratio automatically allocated, wherein the third allocation ratio and the fourth allocation ratio are used to allocate heat to the battery and the air conditioner in the passenger compartment, and the third allocation ratio and the fourth allocation ratio cannot be adjusted by a user; Obtaining battery status, including charging status, discharging status, and charging-discharging-while-discharging status; Heat is distributed according to the battery heating request, the switch state, the battery state, the third distribution ratio, and the fourth distribution ratio.

2. The method according to claim 1, wherein Also includes: If the first distribution ratio is not lower than the lower limit ratio, the heat of the first distribution ratio is distributed to the battery, and the heat of the second distribution ratio is distributed to the air conditioner in the passenger compartment.

3. The method according to claim 2, wherein Allocating heat according to the battery heating request, the switch state, the battery state, the third allocation ratio, and the fourth allocation ratio includes: When the switch state is on and the battery heating request is obtained, determine whether the battery state is in a discharge state. If not, allocate the heat of the third distribution ratio to the battery, and allocate the heat of the fourth distribution ratio to the air conditioner in the passenger compartment; if not, allocate the heat of the fourth distribution ratio to the battery, and allocate the heat of the third distribution ratio to the air conditioner in the passenger compartment; wherein, the third distribution ratio is higher than the fourth distribution ratio.

4. A heat distribution control device for electric vehicles at low temperatures, characterized in that: include: a memory for storing instructions executable by the processor; A processor, configured to execute the instructions to implement the method according to any one of claims 1 to 3.

5. An automotive thermal management system, characterized in that: include: Air conditioning controller; Used to perform the method according to any one of claims 1 to 3; a cockpit domain controller, configured to send a heat allocation option and a ratio of the heat allocation option; a battery management system, configured to determine, based on the battery temperature, whether to send a battery heating request to the control device, and to send the battery status to the communication module; A communication module is respectively connected to the control device, the cockpit domain controller and the battery management system, and the communication module is used to forward the heat distribution options and the ratio of the heat distribution options and the battery status to the control device.

6. The system according to claim 5, wherein: The battery management system is also used for: Determine whether the battery temperature is lower than a first temperature threshold, and if so, send a first heating request; if the battery temperature is higher than the first temperature threshold and lower than a second temperature threshold, send a second heating request; if the battery temperature is higher than the second temperature threshold, do not send the battery heating request.

7. A computer-readable medium storing computer program code, wherein the computer program code implements the method according to any one of claims 1 to 3 when executed by a processor.

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