Vehicle Heating Control Method, Device and Vehicle

Abstract

This application is applicable to the field of vehicle control technology, and provides a vehicle heating control method, device and vehicle. The vehicle heating control method includes: when a heating request for the battery pack is obtained, detecting the heating state of the passenger compartment; when the heating state of the passenger compartment is the on state, controlling the air conditioner heater to operate at the maximum power, controlling the passenger compartment to be heated at the requested power, and calculating the difference power; wherein, the difference power is the difference between the maximum power and the requested power; when the difference power is greater than the preset power value, determining a first target opening degree according to the temperature value of the battery pack body, and controlling the proportional valve in the battery pack heating circuit to open at the first target opening degree. This solves the problem that the heating power of the passenger compartment decreases when the battery pack and the passenger compartment are heated simultaneously.

Description

Technical Field

[0001] This application belongs to the technical field of vehicle control, and particularly relates to a vehicle heating control method, device, and vehicle. Background Art

[0002] For new energy vehicles, due to the particularity of the temperature requirements of their batteries, the temperature of the battery is generally required to be between 25°C and 35°C. This temperature requirement is relatively special, which means that the battery needs to be cooled in summer and heated in winter.

[0003] Existing new energy vehicles use the air conditioning system to heat the battery so that the battery can be maintained in the optimal temperature range. When the air conditioning system receives a heating request from the battery pack, the air conditioning system will respond to the heating request of the battery pack and heat the battery pack at a preset power. As a result, the heating power of the passenger compartment decreases, and the temperature of the passenger compartment drops, affecting the user experience. Summary of the Invention

[0004] The embodiments of this application provide a vehicle heating control method, device, and vehicle, which can solve the problem that the heating power of the passenger compartment decreases when the vehicle air conditioning system heats the battery pack and the passenger compartment simultaneously.

[0005] In a first aspect, the embodiments of this application provide a vehicle heating control method, including:

[0006] When a heating request of the battery pack is obtained, detect the heating state of the passenger compartment;

[0007] When the heating state of the passenger compartment is in the on state, control the air conditioning heater to operate at the maximum power, control the passenger compartment to be heated at the requested power, and calculate the difference power; wherein, the difference power is the difference between the maximum power and the requested power;

[0008] When the difference power is greater than a preset power value, determine a first target opening degree according to the temperature value of the battery pack body, and control the proportional valve in the battery pack heating circuit to open at the first target opening degree.

[0009] In a possible implementation manner of the first aspect, after controlling the proportional valve in the battery pack heating circuit to open at the first target opening degree, it further includes:

[0010] Obtain a first temperature value and a second temperature value, calculate a first heat value absorbed by the battery pack during a first time period according to the first temperature value and the second temperature value, and calculate a second heat value according to the difference power; wherein, the first temperature value is the temperature value of the liquid at the liquid inlet of the battery pack, the second temperature value is the temperature value of the body fluid at the liquid outlet of the battery pack, the starting moment of the first time period is the moment when the proportional valve is opened, the ending moment of the first time period is the moment when the first temperature value is obtained, and the second heat value is the heat generated by the air conditioner heater operating at the difference power during the first time period;

[0011] Adjust the opening degree of the proportional valve according to the first temperature value, the first heat value and the second heat value.

[0012] In a possible implementation manner of the first aspect, the adjusting the opening degree of the proportional valve according to the first temperature value, the first heat value and the second heat value includes:

[0013] When the first temperature value is equal to a preset temperature value and the first heat value is less than or equal to the second heat value, control the proportional valve to maintain the current opening degree;

[0014] When the first temperature value is equal to a preset temperature value and the first heat value is greater than the second heat value, control the proportional valve to reduce the opening degree.

[0015] In a possible implementation manner of the first aspect, the adjusting the opening degree of the proportional valve according to the first temperature value, the first heat value and the second heat value includes:

[0016] When the first temperature value is greater than the preset temperature value, control the proportional valve to reduce the opening degree.

[0017] In a possible implementation manner of the first aspect, the adjusting the opening degree of the proportional valve according to the first temperature value, the first heat value and the second heat value includes:

[0018] When the first temperature value is less than the preset temperature value and the first heat value is less than the second heat value, control the proportional valve to increase the opening degree;

[0019] When the first temperature value is less than the preset temperature value and the first heat value is equal to the second heat value, control the proportional valve to maintain the current opening degree;

[0020] When the first temperature value is less than the preset temperature value and the first heat value is greater than the second heat value, control the proportional valve to reduce the opening degree.

[0021] In a possible implementation of the first aspect, determining the first target opening degree according to the temperature value of the battery pack body includes:

[0022] Determining a first target temperature range according to the temperature value of the battery pack body;

[0023] Determining the first target opening degree according to the first target temperature range;

[0024] The first target temperature range includes a first temperature range and a second temperature range. The first target opening degree includes a first opening degree and a second opening degree. The first temperature range corresponds to the first opening degree, the second temperature range corresponds to the second opening degree. Any temperature value within the second temperature range is greater than any temperature value within the first temperature range, and the second opening degree is greater than the first opening degree.

[0025] In a possible implementation of the first aspect, after detecting the heating state of the passenger compartment when a heating request for the battery pack is obtained, it further includes:

[0026] When the heating state of the passenger compartment is in the off state, controlling the air conditioner heater to operate at the maximum power, and controlling the proportional valve in the battery pack heating circuit to open with a second target opening degree according to the temperature value of the battery pack body;

[0027] When the temperature value of the battery pack body reaches the target temperature value, controlling the air conditioner heater to stop working.

[0028] In a possible implementation of the first aspect, controlling the proportional valve in the battery pack heating circuit to open with a second target opening degree according to the temperature value of the battery pack body includes:

[0029] Determining a second target temperature range according to the temperature value of the battery pack body;

[0030] Controlling the proportional valve to open with the second target opening degree according to the second target temperature range;

[0031] The second target temperature range includes a third temperature range and a fourth temperature range. The second target opening degree includes a third opening degree and a fourth opening degree. The third temperature range corresponds to the third opening degree, the fourth temperature range corresponds to the fourth opening degree. Any temperature value within the fourth temperature range is greater than any temperature value within the third temperature range, and the third opening degree is greater than the fourth opening degree.

[0032] In a second aspect, an embodiment of the present application provides a vehicle heating control device, including:

[0033] A detection module, configured to detect the heating state of the passenger compartment when a heating request for the battery pack is obtained;

[0034] A first calculation module, configured to control the air-conditioning heater to operate at the maximum power, control the occupant compartment to be heated at the requested power, and calculate a difference power when the heating state of the occupant compartment is in an on state; wherein, the difference power is the difference between the maximum power and the requested power.

[0035] A first opening control module, configured to determine a first target opening degree according to the temperature value of the battery pack body and control the proportional valve in the battery pack heating circuit to open at the first target opening degree when the difference power is greater than a preset power value.

[0036] In a third aspect, an embodiment of the present application provides a vehicle, including a controller and an air-conditioning system, where the air-conditioning system includes a heater and a proportional valve, the controller is electrically connected to the heater and the proportional valve respectively, and the controller is configured to execute the method according to any one of the first aspects.

[0037] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of the first aspects is implemented.

[0038] The beneficial effects of the embodiments of the present application compared with the prior art are as follows:

[0039] When a heating request for the battery pack is obtained, the heating state of the occupant compartment is detected. When the heating state of the occupant compartment is in an on state, the air-conditioning heater is controlled to operate at the maximum power, the occupant compartment is controlled to be heated at the requested power, and a difference power is calculated, where the difference power is the difference between the maximum power and the requested power. When the difference power is greater than a preset power value, it indicates that at this time, the air-conditioning heater has sufficient remaining power to heat the battery pack while satisfying the heating of the occupant compartment at the requested power. Then, a first target opening degree is determined according to the temperature value of the battery pack body, and the proportional valve in the battery pack heating circuit is controlled to open at the first target opening degree, and the opening degree when the proportional valve opens is determined according to the temperature value of the battery pack body, so as to realize the efficient heating of the battery pack on the premise of ensuring the stable heating of the occupant compartment.

[0040] It can be understood that the beneficial effects of the above second aspect to the fourth aspect can refer to the relevant descriptions in the above first aspect, and will not be elaborated here. Description of the Drawings

[0041] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0043] Figure 2 It is a schematic flowchart of a vehicle heating control method provided by an embodiment of the present application;

[0044] Figure 3 It is a schematic flowchart of a vehicle heating control method provided by another embodiment of the present application;

[0045] Figure 4 It is a schematic flowchart of a vehicle heating control method provided by another embodiment of the present application;

[0046] Figure 5 It is a schematic structural diagram of a vehicle heating control device provided by an embodiment of the present application;

[0047] Figure 6 It is a schematic structural diagram of a vehicle heating control device provided by an embodiment of the present application;

[0048] Figure 7 It is a schematic structural diagram of a vehicle heating control device provided by another embodiment of the present application. Detailed implementation manners

[0049] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are presented to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0050] It should be understood that when used in the specification and the appended claims of the present application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0051] It should also be understood that the term "and / or" used in the specification and the appended claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0052] As used in the description of the present application and the appended claims, the term "if" may be construed as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be construed as meaning "once determined" or "in response to determining" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]" depending on the context.

[0053] In addition, in the description of the present application and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0054] Reference to "one embodiment" or "some embodiments" or the like described in the present application means that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprising", "including", "having", and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0055] Figure 1 The structural schematic diagram of a vehicle provided by an embodiment of the present application is shown. Refer to Figure 1 As shown, the vehicle includes a controller 10 and an air conditioning system 20. The air conditioning system 20 includes a heater 21 and a proportional valve 22. The controller 10 is electrically connected to the heater 21 and the proportional valve 22 respectively.

[0056] Among them, when the controller 10 obtains a heating request for the battery pack, the controller 10 detects the heating state of the passenger compartment. When the heating state of the passenger compartment is the on state, the controller 10 controls the air conditioning heater 21 to operate at the maximum power, controls the passenger compartment to be heated at the requested power, and calculates the difference power, where the difference power is the difference between the maximum power and the requested power. When the difference power is greater than the preset power value, it means that at this time, the air conditioning heater 21 can still heat the battery pack while satisfying the heating of the passenger compartment at the requested power. The controller 10 controls the proportional valve 22 in the battery pack heating circuit to open at a first target opening according to the temperature value of the battery pack body, which can ensure that when heating the battery, it will not affect the heating of the passenger compartment.

[0057] When the occupant compartment and the battery pack are heated simultaneously, the controller 10 obtains the first temperature value and the second temperature value, calculates the first heat value absorbed by the battery pack within the first time period based on the first temperature value and the second temperature value, and calculates the second heat value based on the differential power. Wherein, the first temperature value is the temperature value of the liquid at the liquid inlet of the battery pack, the second temperature value is the temperature value of the body fluid at the liquid outlet of the battery pack, the start time of the first time period is the time when the proportional valve 22 is opened, the end time of the first time period is the time when the first temperature value is obtained, and the second heat value is the heat generated by the air conditioner heater 21 operating at the differential power within the first time period. The controller 10 adjusts the opening degree of the proportional valve 22 according to the first temperature value, the first heat value and the second heat value. The controller 10 realizes the adjustment of the heating power of the battery pack by adjusting the opening degree of the proportional valve 22 in real time, ensures that the occupant compartment is heated at the requested power, and improves the stability of the heating of the occupant compartment.

[0058] Figure 2 The flowchart of the vehicle heating control method provided by an embodiment of the present application is shown. Refer to Figure 2 As shown, the vehicle heating control method may include steps S101 to S103.

[0059] Step S101, when a heating request for the battery pack is obtained, detect the heating state of the occupant compartment.

[0060] Specifically, when the temperature of the battery pack is lower than the set temperature, a heating request will be sent. When the heating request for the battery pack is obtained, the heating state of the occupant compartment is detected. The heating state of the occupant compartment includes an on state and an off state.

[0061] Step S102, when the heating state of the occupant compartment is the on state, control the air conditioner heater to operate at the maximum power, control the occupant compartment to be heated at the requested power, and calculate the differential power, where the differential power is the difference between the maximum power and the requested power.

[0062] Specifically, when the heating state of the occupant compartment is the on state, it means that the air conditioner heater needs to heat the occupant compartment and the battery pack simultaneously at this time. At this time, control the air conditioner heater to operate at the maximum power, and at the same time control the occupant compartment to be heated at the requested power to ensure that the occupant compartment maintains stable heating and prevent temperature fluctuations in the occupant compartment.

[0063] The calculated differential power is the difference between the maximum power of the air conditioner heater and the requested power of the occupant compartment. The purpose of calculating the differential power is to determine whether there is sufficient additional power to heat the battery pack while ensuring that the occupant compartment operates at the requested power.

[0064] Step S103: When the differential power is greater than the preset power value, determine the first target opening degree according to the temperature value of the battery pack body, and control the proportional valve in the battery pack heating circuit to open at the first target opening degree.

[0065] Specifically, when the differential power is greater than the preset power value, it indicates that at this time, the air conditioner heater has sufficient remaining power to heat the battery pack while meeting the heating requirement of the occupant compartment at the requested power, that is, the heat generated by the air conditioner heater operating at the differential power can meet the heating requirement of the battery pack.

[0066] After determining that the air conditioner heater can heat the battery pack, determine the first target opening degree according to the temperature value of the battery pack body, and control the proportional valve in the battery pack heating circuit to open at the first target opening degree. This design can ensure that the opening degree of the proportional valve in the battery pack heating circuit is appropriate, prevent the opening degree of the proportional valve in the battery pack heating circuit from being too large, affect the heating power of the occupant compartment, and cause the phenomenon of temperature fluctuation in the occupant compartment.

[0067] Exemplarily, step S103 may specifically include step S1031 and step S1032.

[0068] Step S1031: Determine the first target temperature range according to the temperature value of the battery pack body.

[0069] Specifically, after obtaining the temperature value of the battery pack body, the corresponding first target temperature range can be queried in the database in the form of looking up a table, that is, the temperature value of the battery pack body falls within the first target temperature range.

[0070] Step S1032: Determine the first target opening degree according to the first target temperature range.

[0071] Specifically, after determining the first target temperature range, the first target opening degree corresponding to the first target temperature range can be queried in the database in the form of looking up a table. The first target temperature range includes a first temperature range and a second temperature range, the first target opening degree includes a first opening degree and a second opening degree, the first temperature range corresponds to the first opening degree, the second temperature range corresponds to the second opening degree, any temperature value within the second temperature range is greater than any temperature value within the first temperature range, and the second opening degree is greater than the first opening degree. That is, the lower the temperature value of the battery pack body, the smaller the determined first target opening degree. Since when the opening degree of the proportional valve is constant, the lower the temperature of the battery pack body, the faster the battery pack absorbs heat, and the battery pack will occupy the heat for heating the occupant compartment, resulting in a decrease in the heating efficiency of the occupant compartment. Therefore, the lower the temperature value of the battery pack body, the smaller the opening degree when controlling the proportional valve to open, reducing the impact on the heating of the occupant compartment and ensuring stable heating of the occupant compartment.

[0072] It should be noted that the designer can set the temperature range value of the battery pack body and the opening degree of the proportional valve according to actual needs.

[0073] Exemplarily, the correspondence between the temperature range of the battery pack body and the opening degree of the proportional valve is shown in the following table:

[0074] Temperature range of the battery pack body Opening degree of the proportional valve t≤-30℃ 0 -30℃＜t≤-20℃ 10 -20℃＜t≤-10℃ 30 -20℃＜t≤-10℃ 50 -10℃＜t≤0℃ 70 0℃＜t≤10℃ 85 10℃＜t 100

[0075] For example, when the temperature value of the battery pack body is -15°C, the determined first target temperature range is -20°C < t ≤ -10°C, and then the first target opening degree of the proportional valve is determined to be 50.

[0076] Figure 3 The flowchart of the vehicle heating control method provided by another embodiment of the present application is shown. Refer to Figure 3 As shown, after step S103, the vehicle heating control method further includes step S104 and step S105.

[0077] Step S104, obtain the first temperature value and the second temperature value, calculate the first heat value absorbed by the battery pack within the first time period according to the first temperature value and the second temperature value, and calculate the second heat value according to the difference power.

[0078] Specifically, the first temperature value is the temperature value of the liquid at the liquid inlet of the battery pack, the second temperature value is the temperature value of the body fluid at the liquid outlet of the battery pack, the starting moment of the first time period is the moment when the proportional valve is opened, the ending moment of the first time period is the moment when the first temperature value is obtained, and the second heat value is the heat generated by the air conditioner heater operating at the difference power within the first time period.

[0079] Exemplarily, the calculation formula for the first heat value is Q1 = C * ρ * v * (T1 - T2), where Q1 is the first heat value, C is the specific heat capacity of the liquid, ρ is the density of the liquid, v is the flow rate of the liquid flowing through the battery pack within the first time period, T1 is the temperature value of the liquid at the liquid inlet of the battery pack, and T2 is the temperature value of the body fluid at the liquid outlet of the battery pack. When the air conditioner heats the battery pack, the water pump speed in the battery pack heating circuit is a fixed speed, and the specific speed of the water pump can be preset in advance. The flow rate v can be obtained according to the speed of the water pump.

[0080] The calculation formula for the second heat value is M = P1 * t, where M is the second heat value, P1 is the difference power, and t is the duration of the first time period.

[0081] Step S105, adjust the opening degree of the proportional valve according to the first temperature value, the first heat value, and the second heat value.

[0082] Specifically, when the air conditioner heats the passenger compartment and the battery pack simultaneously, the opening degree of the proportional valve is adjusted according to the first temperature value, the first heat value, and the second heat value to achieve real-time adjustment of the proportional valve, improving the heating efficiency of the battery pack on the premise of ensuring stable heating of the passenger compartment.

[0083] Exemplarily, step S105 may include steps S1051 to S1052.

[0084] Step S1051, when the first temperature value is equal to the preset temperature value and the first heat value is less than or equal to the second heat value, control the proportional valve to maintain the current opening degree.

[0085] Specifically, during the process of the air conditioner heater heating the battery pack, there are certain restrictions on the liquid temperature entering the battery pack, that is, the body fluid temperature at the liquid inlet of the battery pack cannot exceed the preset temperature value. The first temperature value being equal to the preset temperature value indicates that the liquid temperature entering the battery pack meets the requirements. The first heat value being less than or equal to the second heat value indicates that the air conditioner heater can simultaneously meet the heating requirements of the battery pack and the passenger compartment. At this time, controlling the proportional valve to maintain the current opening degree enables both the battery and the passenger compartment to be stably heated.

[0086] It should be noted that the designer can set the specific value of the preset temperature value according to the actual situation. For example, the preset temperature value can be set to 40°C.

[0087] Step S1052, when the first temperature value is equal to the preset temperature value and the first heat value is greater than the second heat value, control the proportional valve to reduce the opening degree.

[0088] Specifically, when the first heat value is greater than the second heat value, it indicates that the heat generated by the air conditioner heater operating at the difference power cannot meet the heating requirements of the battery pack. If the opening degree of the proportional valve is maintained, it will cause a decrease in the heating efficiency of the passenger compartment and temperature fluctuations in the passenger compartment. At this time, controlling the proportional valve to reduce the opening degree reduces the heating power of the battery pack to ensure that the passenger compartment can still be heated at the requested power and ensure stable heating of the passenger compartment.

[0089] Exemplarily, step S105 may further include step S1053.

[0090] Step S1053, when the first temperature value is greater than the preset temperature value, control the proportional valve to reduce the opening degree.

[0091] Specifically, when the first temperature value is greater than the preset temperature value, it indicates that the liquid temperature entering the battery pack is too high, posing a potential risk of damaging the battery pack by heating the liquid. At this time, controlling the proportional valve to reduce the opening degree reduces the flow rate of the body fluid entering the battery pack, playing a role in protecting the battery pack.

[0092] Exemplarily, step S105 may further include steps S1054 to S1056.

[0093] Step S1054, when the first temperature value is less than the preset temperature value and the first heat value is less than the second heat value, control the proportional valve to increase the opening degree.

[0094] Specifically, the first temperature value being less than the preset temperature value indicates that the temperature of the liquid entering the battery pack meets the requirements. The first heat value being less than the second heat value indicates that, in addition to the heat required to ensure stable heating of the passenger compartment, the remaining heat generated by the air conditioner heater is greater than the heat absorbed by the battery pack. At this time, control the proportional valve to increase the opening degree to improve the heating efficiency of the battery pack, enabling the battery pack to achieve rapid temperature rise while ensuring stable heating of the passenger compartment.

[0095] Step S1055, when the first temperature value is less than the preset temperature value and the first heat value is equal to the second heat value, control the proportional valve to maintain the current opening degree.

[0096] Specifically, the first heat value being equal to the second heat value indicates that the heat generated by the air conditioner heater can exactly meet the current heating requirements of the passenger compartment and the battery pack. At this time, control the proportional valve to maintain the current opening degree, and the air conditioner heater continues to stably heat the battery pack and the passenger compartment.

[0097] Step S1056, when the first temperature value is less than the preset temperature value and the first heat value is greater than the second heat value, control the proportional valve to decrease the opening degree.

[0098] Specifically, the first heat value being greater than the second heat value indicates that the heat generated by the air conditioner heater cannot meet the heat requirements for heating the passenger compartment and the battery pack. The battery pack will take away more heat, reducing the heating power of the passenger compartment and causing the temperature of the passenger compartment to decrease. At this time, control the proportional valve to decrease the opening degree to reduce the heating power of the battery pack, thereby ensuring that the passenger compartment can still be heated at the requested power and improving the stability of passenger compartment heating.

[0099] Figure 4 The flowchart shows the vehicle heating control method provided by another embodiment of the present application. Refer to Figure 4 As shown, after step S101, the vehicle heating control method may further include steps S106 and S107.

[0100] Step S106, when the heating state of the passenger compartment is in the off state, control the air conditioner heater to operate at the maximum power and control the proportional valve in the battery pack heating circuit to open at the second target opening degree according to the temperature value of the battery pack body.

[0101] Specifically, when the heating state of the passenger compartment is in the off state, the air-conditioning heater heats the battery pack alone, controls the air-conditioning heater to operate at the maximum power, and the heat generated by the air-conditioning heater can meet the heat demand during the heating of the battery pack. At this time, the proportional valve in the battery pack heating circuit is controlled to open at the second target opening degree according to the temperature value of the battery pack body, and the opening degree of the proportional valve in the battery pack heating circuit is determined for different temperature values of the battery pack body, so as to achieve rapid heating of the battery pack.

[0102] Exemplarily, step S106 may specifically include step S1061 and step S1062.

[0103] Step S1061, determining a second target temperature range according to the temperature value of the battery pack body.

[0104] Specifically, after obtaining the temperature value of the battery pack body, the corresponding second target temperature range can be queried in the database in the form of looking up a table, that is, the temperature value of the battery pack body falls within the second target temperature range.

[0105] Step S1062, controlling the proportional valve to open at the second target opening degree according to the second target temperature range.

[0106] Specifically, after determining the second target temperature range, the second target opening degree corresponding to the second target temperature range can be queried in the database in the form of looking up a table, and then the proportional valve is controlled to open at the second target opening degree. The second target temperature range includes a third temperature range and a fourth temperature range, the second target opening degree includes a third opening degree and a fourth opening degree, the third temperature range corresponds to the third opening degree, the fourth temperature range corresponds to the fourth opening degree, any temperature value within the fourth temperature range is greater than any temperature value within the third temperature range, and the third opening degree is greater than the fourth opening degree. That is, the lower the temperature value of the battery pack body, the larger the determined first target opening degree, and the faster the heat provided by the air-conditioning heater to the battery pack body, which helps the battery pack body to quickly rise in temperature to reach the set temperature value.

[0107] It should be noted that the designer can set the temperature range value of the battery pack body and the opening degree of the proportional valve according to actual needs.

[0108] Exemplarily, the corresponding relationship between the temperature range of the battery pack body and the heating opening degree of the proportional valve is shown in the following table:

[0109] Temperature range of the battery pack body Opening degree of the proportional valve t≤-30℃ 100 -30℃＜t≤-20℃ 85 -20℃＜t≤-10℃ 70 -20℃＜t≤-10℃ 50 -10℃＜t≤0℃ 30 0℃＜t≤10℃ 10 10℃＜t 0

[0110] For example, when the temperature value of the battery pack body is -25°C, the determined second target temperature range is -30°C < t ≤ -20°C, and then the second target opening degree of the proportional valve is determined to be 85.

[0111] Step S107: When the temperature value of the battery pack body reaches the target temperature value, control the air-conditioning heater to stop working.

[0112] Specifically, when the temperature value of the battery pack body reaches the target temperature value, it indicates that the temperature of the battery pack body meets the usage requirements. At this time, control the air-conditioning heater to stop working to complete the heating of the battery pack body.

[0113] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0114] Figure 5 The structural schematic diagram of the vehicle heating control device provided by the embodiment of the present application is shown. Refer to Figure 5 As shown, the vehicle heating control device includes:

[0115] A detection module 41, configured to detect the heating state of the passenger compartment when a heating request for the battery pack is obtained;

[0116] A first calculation module 42, configured to control the air-conditioning heater to operate at the maximum power, control the passenger compartment to be heated at the requested power, and calculate the difference power when the heating state of the passenger compartment is in the on state; wherein, the difference power is the difference between the maximum power and the requested power;

[0117] A first opening control module 43, configured to determine a first target opening according to the temperature value of the battery pack body and control the proportional valve in the battery pack heating circuit to open at the first target opening when the difference power is greater than a preset power value.

[0118] Figure 6 The structural schematic diagram of the vehicle heating control device provided by the embodiment of the present application is shown. Refer to Figure 6 As shown, the vehicle heating control device further includes:

[0119] A second calculation module 44, configured to obtain a first temperature value and a second temperature value, calculate a first heat value absorbed by the battery pack within a first time period according to the first temperature value and the second temperature value, and calculate a second heat value according to the difference power; wherein, the first temperature value is the temperature value of the liquid at the inlet of the battery pack, the second temperature value is the temperature value of the body fluid at the outlet of the battery pack, the start time of the first time period is the time when the proportional valve is opened, the end time of the first time period is the time when the first temperature value is obtained, and the second heat value is the heat generated by the air-conditioning heater operating at the difference power within the first time period;

[0120] An adjustment module 45 is configured to adjust the opening degree of the proportional valve according to the first temperature value, the first heat value, and the second heat value.

[0121] In one embodiment of the present application, the adjustment module 45 is further configured to:

[0122] When the first temperature value is equal to a preset temperature value and the first heat value is less than or equal to the second heat value, control the proportional valve to maintain the current opening degree;

[0123] When the first temperature value is equal to a preset temperature value and the first heat value is greater than the second heat value, control the proportional valve to reduce the opening degree.

[0124] In one embodiment of the present application, the adjustment module 45 is further configured to:

[0125] When the first temperature value is greater than a preset temperature value, control the proportional valve to reduce the opening degree.

[0126] In one embodiment of the present application, the adjustment module 45 is further configured to:

[0127] When the first temperature value is less than a preset temperature value and the first heat value is less than the second heat value, control the proportional valve to increase the opening degree;

[0128] When the first temperature value is less than a preset temperature value and the first heat value is equal to the second heat value, control the proportional valve to maintain the current opening degree;

[0129] When the first temperature value is less than a preset temperature value and the first heat value is greater than the second heat value, control the proportional valve to reduce the opening degree.

[0130] In one embodiment of the present application, the first opening control module 43 is further configured to:

[0131] Determine a first target temperature range according to the temperature value of the battery pack body;

[0132] Determine the first target opening degree according to the first target temperature range;

[0133] The first target temperature range includes a first temperature range and a second temperature range, the first target opening degree includes a first opening degree and a second opening degree, the first temperature range corresponds to the first opening degree, the second temperature range corresponds to the second opening degree, any temperature value in the second temperature range is greater than any temperature value in the first temperature range, and the second opening degree is greater than the first opening degree.

[0134] Figure 7 The structural schematic diagram of a vehicle heating control device provided by another embodiment of the present application is shown. Refer toFigure 7 As shown, the vehicle heating control device further includes:

[0135] A second opening control module 46, configured to control the air conditioner heater to operate at the maximum power when the heating state of the passenger compartment is in the off state, and control the proportional valve in the battery pack heating circuit to open at a second target opening according to the temperature value of the battery pack body;

[0136] A stop module 47, configured to control the air conditioner heater to stop working when the temperature value of the battery pack body reaches the target temperature value.

[0137] In an embodiment of the present application, the second opening control module 46 is further configured to:

[0138] Determine a second target temperature range according to the temperature value of the battery pack body;

[0139] Control the proportional valve to open at the second target opening according to the second target temperature range;

[0140] The second target temperature range includes a third temperature range and a fourth temperature range, the second target opening includes a third opening and a fourth opening, the third temperature range corresponds to the third opening, the fourth temperature range corresponds to the fourth opening, any temperature value in the fourth temperature range is greater than any temperature value in the third temperature range, and the third opening is greater than the fourth opening.

[0141] It should be noted that for the information interaction, execution process, etc. between the above-mentioned device / units, since it is based on the same concept as the method embodiment of the present application, for its specific functions and the technical effects brought, please refer to the method embodiment part for details, and will not be elaborated here.

[0142] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment and will not be elaborated here.

[0143] An embodiment of the present application also provides a computer-readable storage medium storing a computer program, which when executed by a processor, can implement the steps in the above-mentioned method embodiments.

[0144] An embodiment of the present application provides a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in the above-mentioned method embodiments when executed.

[0145] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned method embodiments of the present application can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, which can be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium can at least include: any entity or device capable of carrying the computer program code to the terminal device, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disc, etc. In some jurisdictions, according to legislation and patent practice, the computer-readable medium cannot be an electrical carrier signal and a telecommunication signal.

[0146] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0147] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0148] In the embodiments provided in the present application, it should be understood that the disclosed device / network device and method can be implemented in other ways. For example, the device / network device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0149] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0150] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A vehicle heating control method, characterized in that, Including: When a heating request for the battery pack is obtained, detect the heating status of the passenger compartment; When the heating status of the passenger compartment is in the on state, control the air-conditioning heater to operate at the maximum power, control the passenger compartment to be heated at the requested power, and calculate the difference power; wherein, the difference power is the difference between the maximum power and the requested power; When the difference power is greater than a preset power value, determine a first target opening degree according to the temperature value of the battery pack body, and control the proportional valve in the battery pack heating circuit to open at the first target opening degree; Obtain a first temperature value and a second temperature value, calculate a first heat value absorbed by the battery pack within a first time period according to the first temperature value and the second temperature value, and calculate a second heat value according to the difference power; wherein, the first temperature value is the temperature value of the liquid at the inlet of the battery pack, the second temperature value is the temperature value of the body fluid at the outlet of the battery pack, the start time of the first time period is the time when the proportional valve is opened, the end time of the first time period is the time when the first temperature value is obtained, and the second heat value is the heat generated by the air-conditioning heater operating at the difference power within the first time period; Adjust the opening degree of the proportional valve according to the first temperature value, the first heat value and the second heat value.

2. The vehicle heating control method according to claim 1, wherein, The adjusting the opening degree of the proportional valve according to the first temperature value, the first heat value and the second heat value includes: When the first temperature value is equal to a preset temperature value and the first heat value is less than or equal to the second heat value, control the proportional valve to maintain the current opening degree; When the first temperature value is equal to a preset temperature value and the first heat value is greater than the second heat value, control the proportional valve to reduce the opening degree.

3. The vehicle heating control method according to claim 1, characterized in that, The adjusting the opening degree of the proportional valve according to the first temperature value, the first heat value and the second heat value includes: When the first temperature value is greater than a preset temperature value, control the proportional valve to reduce the opening degree.

4. The vehicle heating control method according to claim 1, wherein, The adjusting the opening degree of the proportional valve according to the first temperature value, the first heat value and the second heat value includes: When the first temperature value is less than a preset temperature value and the first heat value is less than the second heat value, control the proportional valve to increase the opening degree; When the first temperature value is less than a preset temperature value and the first heat value is equal to the second heat value, control the proportional valve to maintain the current opening degree; When the first temperature value is less than a preset temperature value and the first heat value is greater than the second heat value, control the proportional valve to reduce the opening degree.

5. The vehicle heating control method according to claim 1, characterized in that The determining the first target opening degree according to the temperature value of the battery pack body includes: Determine a first target temperature range according to the temperature value of the battery pack body; Determine the first target opening degree according to the first target temperature range; The first target temperature range includes a first temperature range and a second temperature range, the first target opening degree includes a first opening degree and a second opening degree, the first temperature range corresponds to the first opening degree, the second temperature range corresponds to the second opening degree, any temperature value within the second temperature range is greater than any temperature value within the first temperature range, and the second opening degree is greater than the first opening degree.

6. The vehicle heating control method according to any one of claims 1 to 5, characterized in that After detecting the heating state of the passenger compartment when a heating request for the battery pack is obtained, it further includes: When the heating state of the passenger compartment is in the off state, control the air-conditioning heater to operate at the maximum power, and control the proportional valve in the battery pack heating circuit to open at a second target opening degree according to the temperature value of the battery pack body; When the temperature value of the battery pack body reaches the target temperature value, control the air-conditioning heater to stop working.

7. The vehicle heating control method according to claim 6, characterized in that, The controlling the proportional valve in the battery pack heating circuit to open at a second target opening degree according to the temperature value of the battery pack body includes: Determine a second target temperature range according to the temperature value of the battery pack body; Control the proportional valve to open at the second target opening degree according to the second target temperature range; The second target temperature range includes a third temperature range and a fourth temperature range, the second target opening degree includes a third opening degree and a fourth opening degree, the third temperature range corresponds to the third opening degree, the fourth temperature range corresponds to the fourth opening degree, any temperature value within the fourth temperature range is greater than any temperature value within the third temperature range, and the third opening degree is greater than the fourth opening degree.

8. A vehicle heating control device, characterized in that, It includes: A detection module, configured to detect the heating state of the passenger compartment when a heating request for the battery pack is obtained; A first calculation module, configured to control the air-conditioning heater to operate at the maximum power, control the passenger compartment to be heated at the requested power, and calculate the difference power when the heating state of the passenger compartment is in the on state; wherein, the difference power is the difference between the maximum power and the requested power; A first opening control module, configured to determine a first target opening degree according to the temperature value of the battery pack body and control the proportional valve in the battery pack heating circuit to open at the first target opening degree when the difference power is greater than a preset power value; A second calculation module, configured to obtain a first temperature value and a second temperature value, calculate a first heat value absorbed by the battery pack within a first time period according to the first temperature value and the second temperature value, and calculate a second heat value according to the difference power; wherein, the first temperature value is the temperature value of the liquid at the inlet of the battery pack, the second temperature value is the temperature value of the body fluid at the outlet of the battery pack, the starting moment of the first time period is the moment when the proportional valve opens, the ending moment of the first time period is the moment when the first temperature value is obtained, and the second heat value is the heat generated by the air-conditioning heater operating at the difference power within the first time period; An adjustment module, configured to adjust the opening degree of the proportional valve according to the first temperature value, the first heat value, and the second heat value.

9. A vehicle, characterized in that, It includes a controller and an air-conditioning system. The air-conditioning system includes a heater and a proportional valve. The controller is electrically connected to the heater and the proportional valve respectively. The controller is used to execute the method according to any one of claims 1 to 7.

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