Passenger compartment heating management method, device and equipment in low-temperature state and medium

Abstract

The invention provides a passenger compartment heating management method, device and equipment in a low-temperature state and a medium. The method comprises the steps that the current charge state and the current temperature state of a vehicle are obtained, and when the current environment temperature is lower than a preset environment low-temperature threshold value and the current battery temperature is lower than a preset battery low-temperature threshold value, the passenger compartment is heated; determining a charge dynamic threshold value based on the current temperature state, and determining a passenger compartment heating strategy under the current charge state according to a comparison result of the current charge state and the charge dynamic threshold value; according to the method, the dynamic charge threshold value is obtained through the current temperature state, so that the charge threshold value is dynamically adjusted through the real-time temperature state to ensure that the passenger compartment heating management strategy can better adapt to the actual application environment, and the heating efficiency and the user experience are improved.

Description

Technical Field

[0001] The present application relates to the field of intelligent control technology, and in particular to a method, device, equipment and medium for passenger compartment heating management under low temperature conditions. Background Art

[0002] Electric vehicle power batteries are generally lithium-ion batteries. The rechargeable range of lithium-ion power batteries is -20℃~55℃, and the discharge range is -30℃-55℃. The optimal working range is generally 25℃~35℃. When it is higher than 35℃, it is generally necessary to request air conditioning cooling through the battery thermal management strategy; when it is lower than 25℃, it is generally necessary to request heater heating through the battery thermal management strategy. When the battery temperature is lower than -20℃, the battery cannot be charged, and the passenger compartment also needs to heat up quickly to meet the needs of users. In the strategies of passenger compartment heating and battery heating, the passenger compartment affects the user experience, and the priority of passenger compartment heating is usually placed above battery heating, that is, battery heating is considered after the heating needs of the passenger compartment are met.

[0003] When the battery SOC is sufficient, users do not need to worry about the battery power and can quickly raise the cabin temperature; but when the SOC is low, it becomes crucial to balance the relationship between battery power and cabin heating. Since the battery's charging and heating capabilities are different at different temperatures, determining the corresponding thermal management strategy based on a fixed temperature threshold is relatively rigid and sometimes seriously inconsistent with the actual environmental conditions of the battery. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present application provides a passenger compartment heating management method, device, equipment and medium under low temperature conditions to solve the above-mentioned technical problems.

[0005] The present application provides a passenger compartment heating management method under low temperature conditions, the method comprising: obtaining a current state of charge and a current temperature state of the vehicle, the current temperature state comprising a current battery temperature and a current ambient temperature; when the current battery temperature is less than a preset battery low temperature threshold, and the current ambient temperature is less than a preset ambient low temperature threshold, determining a charge dynamic threshold based on the current temperature state; comparing the current state of charge and the charge dynamic threshold to obtain a charge comparison result, and determining a passenger compartment heating strategy under the current charge state according to the charge comparison result.

[0006] In one embodiment of the present application, a dynamic charge threshold is determined based on the current temperature state, including: testing the passenger compartment heating power under different battery charge states, and obtaining a first charge threshold based on a comparison result of the passenger compartment heating power and the battery discharge power, wherein the battery discharge power is obtained by querying a preset T-SOC mapping table based on the current temperature state; testing the heating results of heating the battery based on the battery power under different battery states, and determining a second charge threshold based on the heating results; and obtaining the dynamic charge threshold based on the first charge threshold and the second charge threshold.

[0007] In one embodiment of the present application, the passenger compartment heating power under different battery charge states is tested, and a first charge threshold is obtained based on a comparison result of the passenger compartment heating power and the battery discharge power, including: setting an arbitrary temperature as a target battery temperature, and determining an arbitrary charge state as an initial charge state, the target battery temperature being higher than the current battery temperature; heating the battery based on the initial charge state until the battery temperature reaches the target battery temperature, and recording the heating time; calculating the heating time, the current ambient temperature, and the target battery temperature to obtain the passenger compartment heating power under the current battery state; obtaining multiple passenger compartment heating powers according to different initial charge states, and comparing the multiple passenger compartment heating powers with the battery discharge power to obtain a heating power critical value having the smallest difference with the battery discharge power, the heating power critical value being greater than the battery discharge power; defining the initial charge state corresponding to the heating power critical value to obtain the first charge threshold.

[0008] In one embodiment of the present application, the heating results of heating a battery based on the battery power under different battery states are tested, and a second charge threshold is determined based on the heating results, including: obtaining a minimum charging temperature of the battery; heating the battery based on the battery power under different initial charge states to obtain a battery heating charge threshold value, wherein the battery heating charge threshold value is the minimum charge value required to heat the battery to the battery minimum charging temperature based on the battery power; and determining the battery heating charge threshold value as the second charge threshold value.

[0009] In one embodiment of the present application, the dynamic charge threshold is obtained according to the first charge threshold and the second charge threshold, including: determining a larger value of the first charge threshold and the second charge threshold as the dynamic charge threshold; or, determining a smaller value of the first charge threshold and the second charge threshold as the dynamic charge threshold; or, calculating the average of the first charge threshold and the second charge threshold, and determining the average as the dynamic charge threshold.

[0010] In one embodiment of the present application, a passenger compartment heating strategy under the current charge state is determined based on the charge comparison result, including: when the battery charge is higher than the dynamic charge threshold, a priority strategy is adopted to heat the passenger compartment, and the priority strategy preferentially uses the battery charge to heat the passenger compartment; when the battery charge is lower than the dynamic charge threshold, the current battery temperature is collected, and a temperature comparison result between the current battery temperature and a preset temperature threshold is obtained, so as to determine the passenger compartment heating strategy under the current battery temperature state based on the temperature comparison result.

[0011] In one embodiment of the present application, a passenger compartment heating strategy under the current battery temperature state is determined based on the temperature comparison result, including: if the current battery temperature is higher than a preset temperature threshold, a normal heating strategy is adopted to heat the passenger compartment, and the normal heating strategy allows the passenger compartment to be heated by battery power or an external power source; if the current battery temperature is lower than the preset temperature threshold, a prohibited heating strategy is adopted to heat the passenger compartment, and the prohibited heating strategy allows the passenger compartment to be heated by an external power source and prohibits heating the passenger compartment by battery power.

[0012] The present application provides a passenger compartment heating management device under low-temperature conditions, the device comprising: a data acquisition module, used to obtain a current state of charge and a current temperature state of a vehicle, the current temperature state comprising a current battery temperature and a current ambient temperature; a threshold generation module, used to determine a dynamic charge threshold based on the current temperature state when the current battery temperature is less than a preset battery low-temperature threshold and the current ambient temperature is less than a preset ambient low-temperature threshold; a threshold comparison module, used to compare the current state of charge and the dynamic charge threshold to obtain a power comparison result; and a heating strategy determination module, used to determine a passenger compartment heating strategy under the current state of charge according to the power comparison result.

[0013] The present application provides an electronic device, including a processor, a memory and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the passenger compartment heating management method under low temperature conditions as described above.

[0014] The present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is used to enable a computer to execute the passenger compartment heating management method under low temperature conditions as described above.

[0015] Beneficial effects of the present application: The passenger compartment heating management method under low temperature conditions proposed in the present application is optimized specifically for low temperature environments. The method first collects the vehicle's current state of charge, battery temperature, and ambient temperature information, and integrates the battery temperature and ambient temperature to define the current temperature state; then, based on this temperature state, a charge threshold is dynamically calculated; then, by comparing the current state of charge with the dynamic charge threshold, the optimal passenger compartment heating strategy at the current charge level is intelligently determined. The method can flexibly adjust the charge threshold according to the real-time temperature state, ensuring that the passenger compartment heating management strategy can closely fit the actual operating environment, thereby significantly improving heating efficiency and enhancing user experience.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 is a schematic diagram of an implementation environment of a passenger compartment heating management method under low temperature conditions shown in an exemplary embodiment of the present application;

[0019] Figure 2 is a flow chart of a passenger compartment heating management method under low temperature conditions shown in an exemplary embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of the overall solution steps of a passenger compartment heating management method under low temperature conditions shown in an exemplary embodiment of the present application;

[0021] Figure 4 is a block diagram of a passenger compartment heating management device in a low temperature state shown in an exemplary embodiment of the present application;

[0022] Figure 5 A schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0025] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0026] First of all, it should be explained that PTC (Positive Temperature Coefficient), positive temperature coefficient thermistor technology, is a technology that uses the property that the resistance of a material increases as the temperature rises to perform heating.

[0027] SOC (State of Charge) refers to the state of charge of the battery, that is, the ratio of the remaining battery power to the power when it is fully charged, usually expressed as a percentage. It is an important indicator to measure the current available energy of the battery.

[0028] Figure 1 It is a schematic diagram of the implementation environment of a passenger compartment heating management method under low temperature conditions shown in an exemplary embodiment of the present application.

[0029] like Figure 1As shown, the implementation environment of the passenger compartment heating management method under low temperature conditions includes a data acquisition module 101 and a computer module 102. Among them, the data acquisition module 101 is responsible for collecting raw data during the operation of the tram, including but not limited to the current state of charge (SOC) of the battery, the current temperature of the battery, the current ambient temperature and other related parameters, such as the heating requirements of the passenger compartment, the driving status of the vehicle, etc. The data acquisition equipment can be various sensors installed on the tram (such as temperature sensors, battery management systems, ambient temperature sensors, etc.), or it can be data collected by an external device after being connected to the tram wirelessly or wired. This application does not impose any restrictions on the specific implementation form of the data acquisition module. The computer module 102 is used to process the raw data collected by the data acquisition module 101 and perform the following tasks: analyze the operation of the electric vehicle under low temperature conditions; calculate the heating power (P1) required for heating the passenger compartment based on the collected data; according to the current temperature and the current SOC, find the preset discharge power (P(n)) from the T-SOC mapping table; compare the heating power (P1) with the discharge power (P(n)), and determine the passenger compartment heating strategy based on the comparison result; optimize the battery heating strategy to ensure that the battery can quickly reach the appropriate charging temperature. The computer module 102 can be a high-performance GPU computer, a GPU computing cluster, a dedicated edge computing device, or an embedded system integrated in the electric vehicle. This application also does not impose any restrictions on the specific type of computer equipment.

[0030] Figure 2 It is a flow chart of a passenger compartment heating management method under low temperature conditions shown in an exemplary embodiment of the present application.

[0031] like Figure 2 As shown, in an exemplary embodiment, the passenger compartment heating management method under low temperature conditions includes at least steps S210 to S230, which are described in detail as follows:

[0032] Step S210, obtaining the current state of charge and current temperature of the vehicle, wherein the current temperature includes the current battery temperature and the current ambient temperature.

[0033] In one embodiment of the present application, the current state of charge (SOC) of the vehicle battery is acquired in real time through sensors installed on the vehicle, the current battery temperature (Tb) is measured by a battery temperature sensor to understand the actual operating temperature of the battery, and the current ambient temperature (Ta) is measured using an ambient temperature sensor to evaluate the impact of the external environment on the vehicle heating system, and the current battery temperature (Tb) and the current ambient temperature (Ta) are combined and defined as the current temperature state for subsequent analysis and decision-making.

[0034] Step S220, when the current battery temperature is lower than the preset battery low temperature threshold and the current ambient temperature is lower than the preset ambient low temperature threshold, determining the charge dynamic threshold based on the current temperature state.

[0035] In one embodiment of the present application, a dynamic charge threshold is determined based on the current temperature state, including: testing the passenger compartment heating power under different battery charge states, and obtaining a first charge threshold based on a comparison result of the passenger compartment heating power and the battery discharge power, the battery discharge power being obtained by querying a preset T-SOC mapping table based on the current temperature state; testing the heating result of heating the battery based on the battery power under different battery states, and determining a second charge threshold based on the heating result; obtaining the dynamic charge threshold based on the first charge threshold and the second charge threshold.

[0036] It should be noted that before generating the dynamic charge threshold, it is necessary to determine the current environmental state. If the current ambient temperature and the current battery temperature are both lower than their corresponding preset thresholds, that is, the current ambient temperature is lower than the ambient low temperature threshold, and the current battery temperature is lower than the battery low temperature threshold, the current environment is regarded as a low temperature environment. In low temperature environments, it is particularly important to pay attention to the balance between battery power and passenger compartment heating needs to ensure that the user experience is improved as much as possible under the premise of ensuring normal use of the vehicle. Therefore, the battery low temperature threshold and the ambient low temperature threshold proposed in this application are both preset values, and their preset conditions vary based on different actual needs. Therefore, this application does not impose any restrictions on the setting method and specific values ​​of its preset thresholds.

[0037] In a specific embodiment of the present application, the current state of charge (SOC) of the vehicle battery is first obtained in real time through sensors installed on the vehicle, and the current battery temperature (Tb) is measured by a battery temperature sensor to understand the actual operating temperature of the battery; the current ambient temperature (Ta) is measured by an ambient temperature sensor to evaluate the impact of the external environment on the vehicle heating system, and the current battery temperature (Tb) and the current ambient temperature (Ta) are combined to define the current temperature state. Then, the first charge threshold is obtained by testing the passenger compartment heating power, the second charge threshold is obtained by testing the battery heating results, and finally the final charge dynamic threshold is obtained based on the first charge threshold and the second charge threshold.

[0038] The specific steps of obtaining the first charge threshold value through the passenger compartment heating power test are as follows: Under the current temperature state, test the passenger compartment heating power (P1) under different charge states (SOC), and according to the current temperature state (Tb, Ta), find the corresponding battery discharge power (P(n)) from the preset T-SOC mapping table. The T-SOC mapping table contains discharge power data under different temperatures and charge states. Then, compare the passenger compartment heating power (P1) with the battery discharge power (P(n)), and obtain the first charge threshold value (SOC1) based on the comparison result. If the heating power (P1) is less than or equal to the discharge power (P(n)), the first charge threshold value (SOC1) is a lower value, otherwise it is a higher value. The specific steps for obtaining the second charge threshold value through battery heating result testing are as follows: Under different battery states (i.e. different SOC and temperature combinations), test the effect of heating the battery based on the battery charge, record the heating time and temperature change, and determine the charge value that can heat the battery to the lowest charging temperature (e.g. -20°C) based on the battery charge according to the heating results, i.e. the second charge threshold value (SOCc).

[0039] In one embodiment of the present application, the passenger compartment heating power under different battery charge states is tested, and a first charge threshold is obtained based on a comparison result of the passenger compartment heating power and the battery discharge power, including: setting an arbitrary temperature as a target battery temperature, and determining an arbitrary charge state as an initial charge state, the target battery temperature is higher than the current battery temperature; heating the battery based on the initial charge state until the battery temperature reaches the target battery temperature, and recording the heating time; calculating the heating time, the current ambient temperature and the target battery temperature to obtain the passenger compartment heating power under the current battery state; obtaining multiple passenger compartment heating powers according to different initial charge states, and comparing the multiple passenger compartment heating powers with the battery discharge power to obtain a heating power critical value with the smallest difference from the battery discharge power, the heating power critical value being greater than the battery discharge power; defining the initial charge state corresponding to the heating power critical value to obtain the first charge threshold.

[0040] In a specific embodiment of the present application, the heater in the electric vehicle is usually a PTC (positive temperature coefficient) heater, and since its heating power varies with temperature, the heating power (P1) required for heating the passenger compartment is calculated based on the following formula:

[0041]

[0042] Where P1 represents the passenger compartment heating power, C p represents the specific heat of air, ρ represents the air density, T c1 Indicates the target temperature, T am Indicates the current ambient temperature, and t indicates the heating time.

[0043] If the passenger compartment temperature rise rate is lower than the preset passenger compartment temperature rise threshold, it is considered that there is no temperature rise in the passenger compartment. At this time, the passenger compartment heating should be prohibited, and the power originally used for passenger compartment heating should be used to heat the battery. Therefore, the discharge power (P(n)) corresponding to the current temperature state (Tb, Ta) and the current state of charge (SOC) is further queried from the preset T-SOC mapping table. The T-SOC mapping table is shown in Table 1:

[0044] Table 1

[0045]

[0046] Assuming the current ambient temperature is -28°C, the discharge power corresponding to the SOC (2, n) is P(2, n). Compare the heating power (P1) with the discharge power (P(n)). If the heating power (P1) is equal to the discharge power (P(n)) when the SOC is 15%, 15% is determined as the first charge threshold.

[0047] In one embodiment of the present application, the heating results of heating a battery based on the battery power under different battery states are tested, and a second charge threshold is determined based on the heating results, including: obtaining a minimum charging temperature of the battery; heating the battery based on the battery power under different initial charge states to obtain a battery heating charge threshold value, the battery heating charge threshold value being the minimum charge value required to heat the battery to the battery minimum charging temperature based on the battery power; and determining the battery heating charge threshold value as the second charge threshold value.

[0048] In one embodiment of the present application, the minimum charging temperature of the battery is -20°C. First, the battery is heated based on the battery charge at different initial states of charge (SOCi), and the temperature change is recorded. The minimum charge value that can heat the battery to the minimum charging temperature (-20°C) based on the battery charge is determined, that is, the battery heating charge critical value (SOCc), and the battery heating charge critical value (SOCc) is determined as the second charge threshold.

[0049] In one embodiment of the present application, a dynamic charge threshold is obtained based on a first charge threshold and a second charge threshold, including: determining a larger value of the first charge threshold and the second charge threshold as the dynamic charge threshold; or, determining a smaller value of the first charge threshold and the second charge threshold as the dynamic charge threshold; or, calculating the average of the first charge threshold and the second charge threshold, and determining the average as the dynamic charge threshold.

[0050] Step S230 , comparing the current state of charge with the dynamic charge threshold to obtain a power comparison result, and determining a passenger compartment heating strategy under the current state of charge according to the power comparison result.

[0051] In one embodiment of the present application, the passenger compartment heating strategy under the current state of charge is determined based on the power comparison result, including: when the battery power is higher than the charge dynamic threshold, the passenger compartment is heated by a priority strategy, and the priority strategy preferentially uses the battery power to heat the passenger compartment; when the battery power is lower than the charge dynamic threshold, the current battery temperature is collected, and a temperature comparison result between the current battery temperature and a preset temperature threshold is obtained, so as to determine the passenger compartment heating strategy under the current battery temperature state based on the temperature comparison result. The passenger compartment heating strategy under the current battery temperature state is determined based on the temperature comparison result, including: if the current battery temperature is higher than the preset temperature threshold, the passenger compartment is heated by a common heating strategy, and the common heating strategy allows the passenger compartment to be heated by the battery power or an external power source; if the current battery temperature is lower than the preset temperature threshold, the passenger compartment is heated by a prohibited heating strategy, and the prohibited heating strategy allows the passenger compartment to be heated by an external power source and prohibits the passenger compartment from being heated by the battery power.

[0052] In one embodiment of the present application, when the current battery power is 85%, the dynamic threshold is 70%, the battery temperature is 25°C, and the preset temperature threshold is 0°C, the system will adopt a priority strategy to heat the passenger compartment because the current battery power (85%) is higher than the set dynamic threshold (70%). When the current battery power is 20%, the dynamic threshold is 30%, the battery temperature is 10°C, and the preset temperature threshold is 0°C, although the battery power is lower than the dynamic threshold (20% < 30%), the system will adopt a normal heating strategy because the battery temperature (10°C) is higher than the preset temperature threshold (0°C). In other words, the system can use the battery power or external power supply to heat the passenger compartment, but considering the low battery power, it may be more inclined to use an external power supply. When the current battery power is 15%, the dynamic threshold is 20%, the battery temperature is -5°C, and the preset temperature threshold is 0°C, the system will adopt a prohibition heating strategy because the battery power (15%) is lower than the dynamic threshold (20%) and the battery temperature (-5°C) is lower than the preset temperature threshold (0°C). In this case, although the passenger compartment needs to be heated, in order to avoid performance degradation or even damage to the battery due to discharge at low temperatures, the system will prohibit the use of battery power to heat the passenger compartment. At the same time, it allows the use of external power to provide heating for the passenger compartment.

[0053] Figure 3 It is a schematic diagram of the overall scheme steps of a passenger compartment heating management method under low temperature conditions shown in an exemplary embodiment of the present application.

[0054] like Figure 3As shown, first, the temperature of the passenger compartment is detected. When the temperature of the passenger compartment is low, the user will turn on the passenger compartment heating and heat the passenger compartment through PTC or heat pump. Specifically, the temperature of the air outlet of the passenger compartment is detected. If the air outlet temperature T C Greater than or equal to the passenger compartment heating threshold T S , heating is stopped, otherwise it is further determined whether the battery SOC is lower than the threshold for prohibiting air conditioning heating. If so, the battery is heated by PTC, and heating of the passenger compartment by the battery is prohibited until the battery temperature exceeds a preset temperature threshold (the threshold may be the lowest temperature for charging the battery). The prohibition is then lifted, heating of the passenger compartment is allowed, and the battery is charged normally.

[0055] In a specific embodiment of the present application, it is assumed that on a cold winter morning, the owner starts the vehicle and prepares to go to work. The vehicle system automatically detects the temperature of the passenger compartment air outlet, where the current passenger compartment air outlet temperature is 5°C, the passenger compartment heating threshold TS set is 18°C, the battery SOC (State of Charge): 25%, the air conditioning heating threshold is 30%, the battery temperature is -35°C, and the minimum temperature threshold for battery charging is -20°C. First, the current passenger compartment air outlet temperature is 5°C, which is lower than the set heating threshold of 18°C, so the system determines that the passenger compartment needs to be heated; secondly, the current battery SOC is 25%, which is lower than the set air conditioning heating threshold of 30%, then the battery is heated by PTC (Positive Temperature Coefficient) technology, and the passenger compartment is prohibited from being heated by the battery. During the PTC heating period, the system will continue to monitor the battery temperature. When the battery temperature rises above -20°C, the prohibition of heating is lifted, allowing the battery to be used to heat the passenger compartment, and the battery can be charged normally.

[0056] It should be noted that based on the passenger compartment heating management method under low temperature conditions proposed in this application, the vehicle can protect the battery from low temperature damage under cold conditions, while ensuring that the passenger compartment gradually warms up to a comfortable temperature, thereby ensuring the comfort of the passengers and avoiding the risk of battery performance degradation or damage due to low temperature.

[0057] Figure 4 is a block diagram of a passenger compartment heating management device under low temperature conditions shown in an exemplary embodiment of the present application. The device can be applied to Figure 1 The device may also be applicable to other exemplary implementation environments and specifically configured in other devices, and this embodiment does not limit the implementation environment to which the device is applicable.

[0058] like Figure 4As shown, the exemplary passenger compartment heating management device under low temperature conditions includes: a data acquisition module 410 , a threshold generation module 420 , a threshold comparison module 430 , and a heating strategy determination module 440 .

[0059] Among them, the data acquisition module 410 is used to obtain the current charge state and current temperature state of the vehicle, and the current temperature state includes the current battery temperature and the current ambient temperature; the threshold generation module 420 is used to determine the charge dynamic threshold based on the current temperature state when the current battery temperature is lower than the preset battery low temperature threshold and the current ambient temperature is lower than the preset ambient low temperature threshold; the threshold comparison module 430 is used to compare the current charge state and the charge dynamic threshold to obtain a charge comparison result; the heating strategy determination module 440 is used to determine the passenger compartment heating strategy under the current charge state according to the charge comparison result.

[0060] It should be noted that the passenger compartment heating management device under low temperature conditions provided in the above embodiment and the passenger compartment heating management method under low temperature conditions provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs operations has been described in detail in the method embodiment, and will not be repeated here. In actual applications, the passenger compartment heating management device under low temperature conditions provided in the above embodiment can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0061] An embodiment of the present application also provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the electronic device implements the passenger compartment heating management method under low temperature conditions provided in the above-mentioned embodiments.

[0062] Figure 5 The structure diagram of the computer system suitable for implementing the electronic device of the embodiment of the present application is shown. It should be noted that: Figure 5 The computer system 500 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0063] like Figure 5As shown, the computer system 500 includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage part 508 to the random access memory (RAM) 503, such as executing the method described in the above embodiment. In the RAM 503, various programs and data required for system operation are also stored. The CPU 501, the ROM 502 and the RAM 503 are connected to each other through the bus 504. The input / output (I / O) interface 505 is also connected to the bus 504.

[0064] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed so that a computer program read therefrom is installed into the storage section 508 as needed.

[0065] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 509, and / or installed from a removable medium 511. When the computer program is executed by a central processing unit (CPU) 501, various functions defined in the system of the present application are executed.

[0066] It should be noted that the computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a computer-readable computer program is carried. This propagated data signal can take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0067] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0068] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0069] Another aspect of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer executes the passenger compartment heating management method under low temperature as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0070] Another aspect of the present application also provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the passenger compartment heating management method under low temperature state provided in each of the above embodiments.

[0071] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A passenger compartment heating management method under low temperature conditions, characterized in that: The method comprises: Acquire the current state of charge and current temperature of the vehicle, wherein the current temperature state includes the current battery temperature and the current ambient temperature; When the current battery temperature is lower than a preset battery low temperature threshold, and the current ambient temperature is lower than a preset ambient low temperature threshold, determining a charge dynamic threshold based on the current temperature state; The current state of charge is compared with the dynamic charge threshold to obtain a power comparison result, and a passenger compartment heating strategy under the current state of charge is determined according to the power comparison result.

2. The passenger compartment heating management method under low temperature conditions according to claim 1, characterized in that: Determining a charging dynamic threshold based on the current temperature state includes: Testing the passenger compartment heating power under different battery charge states, and obtaining a first charge threshold value based on a comparison result of the passenger compartment heating power and a battery discharge power, wherein the battery discharge power is obtained by querying a preset T-SOC mapping table based on a current temperature state; testing heating results of heating the battery based on the battery power under different battery states, and determining a second charge threshold based on the heating results; The charging dynamic threshold is obtained according to the first charging threshold and the second charging threshold.

3. The passenger compartment heating management method under low temperature conditions according to claim 2, characterized in that: Testing the passenger compartment heating power under different battery charge states, and obtaining a first charge threshold value based on a comparison result of the passenger compartment heating power and the battery discharge power, including: Setting any temperature as a target battery temperature and determining any state of charge as an initial state of charge, the target battery temperature being higher than the current battery temperature; heating the battery based on the initial state of charge until the temperature of the battery reaches the target battery temperature, and recording the heating time; calculating the heating time, the current ambient temperature and the target battery temperature to obtain the passenger compartment heating power under the current battery state; obtaining a plurality of passenger compartment heating powers according to different initial states of charge, and comparing the plurality of passenger compartment heating powers with the battery discharge power to obtain a heating power critical value having a minimum difference with the battery discharge power, the heating power critical value being greater than the battery discharge power; The initial state of charge corresponding to the heating power critical value is determined as a first charge threshold.

4. The passenger compartment heating management method under low temperature conditions according to claim 2, characterized in that: Testing heating results of heating a battery based on the battery power under different battery states, and determining a second charge threshold based on the heating results, including: Get the minimum charging temperature of the battery; heating the battery based on the battery power at different initial charge states to obtain a battery heating charge threshold value, wherein the battery heating charge threshold value is a minimum charge value required to heat the battery to a minimum charging temperature of the battery based on the battery power; The battery heating charging critical value is determined as the second charging threshold value.

5. The passenger compartment heating management method under low temperature conditions according to claim 2, characterized in that: Obtaining the charging dynamic threshold according to the first charging threshold and the second charging threshold includes: Determine a larger value between the first charging threshold and the second charging threshold as the charging dynamic threshold; or, Determine a smaller value between the first charging threshold and the second charging threshold as the charging dynamic threshold; or, An average of the first charging threshold and the second charging threshold is calculated, and the average is determined as the charging dynamic threshold.

6. The passenger compartment heating management method under low temperature conditions according to any one of claims 1 to 4, characterized in that: Determining a passenger compartment heating strategy at the current state of charge according to the power comparison result includes: When the battery power is higher than the dynamic charge threshold, a priority strategy is used to heat the passenger compartment, wherein the priority strategy is to use the battery power to heat the passenger compartment first; When the battery power is lower than the dynamic charge threshold, the current battery temperature is collected, and a temperature comparison result between the current battery temperature and a preset temperature threshold is obtained, so as to determine the passenger compartment heating strategy under the current battery temperature state based on the temperature comparison result.

7. The passenger compartment heating management method under low temperature conditions according to claim 6, characterized in that: Determining a passenger compartment heating strategy under a current battery temperature state based on the temperature comparison result includes: If the current battery temperature is higher than a preset temperature threshold, a common heating strategy is used to heat the passenger compartment, wherein the common heating strategy allows the passenger compartment to be heated by the battery power or an external power source; If the current battery temperature is lower than a preset temperature threshold, a heating prohibition strategy is used to heat the passenger compartment. The heating prohibition strategy allows the passenger compartment to be heated by an external power source and prohibits heating the passenger compartment by battery power.

8. A passenger compartment heating management device under low temperature conditions, characterized in that: The device comprises: A data acquisition module, used to obtain the current state of charge and current temperature of the vehicle, wherein the current temperature includes the current battery temperature and the current ambient temperature; A threshold generation module, configured to determine a charge dynamic threshold based on the current temperature state when the current battery temperature is lower than a preset battery low temperature threshold and the current ambient temperature is lower than a preset ambient low temperature threshold; A threshold comparison module, used to compare the current state of charge with the charge dynamic threshold to obtain a power comparison result; A heating strategy determination module is used to determine a passenger compartment heating strategy under the current state of charge according to the power comparison result.

9. An electronic device, characterized in that: It includes a processor, a memory and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the passenger compartment heating management method under low temperature conditions as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is used to enable a computer to execute the passenger compartment heating management method under low temperature conditions as described in any one of claims 1 to 7.

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