CN115107449A - Vehicle heating control method, device and vehicle - Google Patents

Abstract

The application is suitable for the technical field of vehicle control, and provides a vehicle heating control method, a device and a vehicle, wherein the vehicle heating control method comprises the following steps: when a heating request of a battery pack is acquired, detecting the heating state of a passenger compartment; when the heating state of the passenger compartment is an opening state, controlling the air conditioner heater to operate at the maximum power, controlling the passenger compartment to heat at the requested power, and calculating the difference power; the difference power is the difference between the maximum power and the requested power; when the difference power is larger than the preset power value, determining a first target opening according to the temperature value of the battery pack body, and controlling a proportional valve in a battery pack heating loop to be opened at the first target opening. The problem of when battery package and passenger cabin heat simultaneously, passenger cabin heating power reduces is solved.

Description

Vehicle heating control method, device and vehicle

technical field

The present application belongs to the technical field of vehicle control, and in particular, relates to a vehicle heating control method, device and vehicle.

Background technique

For new energy vehicles, due to the particularity of the battery's temperature requirements, 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 the battery in winter Sometimes the battery needs to be heated.

Existing new energy vehicles use the air conditioning system to heat the battery to keep the battery in the optimal temperature range. When the air conditioning system receives the heating request of the battery pack, the air conditioning system will respond to the heating request of the battery pack and heat the battery pack with the preset power, the heating power of the passenger compartment is reduced, and the temperature of the passenger compartment is reduced, which affects the user's experience. .

SUMMARY OF THE INVENTION

Embodiments of the present application provide a vehicle heating control method, device, and vehicle, which can solve the problem that the heating power of the passenger compartment is reduced when the vehicle air conditioning system heats the battery pack and the passenger compartment at the same time.

In a first aspect, an embodiment of the present application provides a vehicle heating control method, including:

When the heating request of the battery pack is obtained, the heating state of the passenger compartment is detected;

When the heating state of the passenger compartment is on, the air conditioner heater is controlled to run at the maximum power, the passenger compartment is controlled to be heated at the requested power, and the differential power is calculated; wherein, the differential power is the maximum power the difference between the power and the requested power;

When the differential power is greater than the preset power value, the 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 be opened at the first target opening degree.

In a possible implementation manner of the first aspect, after the proportional valve in the control battery pack heating circuit is opened at the first target opening degree, the method further includes:

Obtain a first temperature value and a second temperature value, calculate a first heat value absorbed by the battery pack in a first time period according to the first temperature value and the second temperature value, and calculate according to the difference power The second calorific value; 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, and the first temperature value is the temperature value of the body fluid at the liquid outlet of the battery pack. The start time of a 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 when the air conditioner heater is at heat generated by operating at the differential power during the first time period;

The opening degree of the proportional valve is adjusted according to the first temperature value, the first heat value and the second heat value.

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 calorific value and the second calorific 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, controlling 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, the proportional valve is controlled to decrease the opening degree.

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 calorific value and the second calorific value includes:

When the first temperature value is greater than a preset temperature value, the proportional valve is controlled to decrease the opening degree.

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 calorific value and the second calorific 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, controlling the proportional valve to increase the opening degree;

When the first temperature value is less than a preset temperature value and the first calorific value is equal to the second calorific value, controlling 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, the proportional valve is controlled to decrease the opening degree.

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

determining a first target temperature range according to the temperature value of the battery pack body;

determining 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 includes a first opening and a second opening, and the first temperature range corresponds to the first opening, 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. Spend.

In a possible implementation manner of the first aspect, after the heating state of the passenger compartment is detected when the heating request of the battery pack is obtained, the method further includes:

When the heating state of the passenger compartment is in the off state, the air conditioner heater is controlled to run at the maximum power, and the proportional valve in the battery pack heating circuit is controlled to open at the second target according to the temperature value of the battery pack body. degree open;

When the temperature value of the battery pack body reaches the target temperature value, the air conditioner heater is controlled to stop working.

In a possible implementation manner of the first aspect, the controlling the proportional valve in the heating circuit of the battery pack to be opened at a second target opening degree according to the temperature value of the battery pack body includes:

determining a second target temperature range according to the temperature value of the battery pack body;

controlling 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 includes a third opening and a fourth opening, and the third temperature range corresponds to the third opening, The fourth temperature range corresponds to the fourth opening degree, any temperature value in the fourth temperature range is greater than any temperature value in the third temperature range, and the third opening degree is greater than the fourth opening degree. Spend.

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

The detection module is used to detect the heating state of the passenger compartment when the heating request of the battery pack is obtained;

a first calculation module, configured to control the air-conditioning heater to run at the maximum power when the heating state of the passenger compartment is in the on state, control the passenger compartment to be heated at the requested power, and calculate the difference power; wherein, the The difference power is the difference between the maximum power and the requested power;

The first opening control module is used to determine the first target opening degree according to the temperature value of the battery pack body when the differential power is greater than the preset power value, and control the proportional valve in the heating circuit of the battery pack to the first target opening degree. The target opening is turned on.

In a third aspect, an embodiment of the present application provides a vehicle, including a controller and an air conditioning system, the air conditioning system including a heater and a proportional valve, and the controller is electrically connected to the heater and the proportional valve, respectively, The controller is configured to perform the method of any one of the first aspects.

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, implements any one of the first aspect. method.

The beneficial effects that the embodiments of the present application have compared with the prior art are:

When the heating request of the battery pack is obtained, the heating state of the passenger compartment is detected. When the heating state of the passenger compartment is on, the air conditioner heater is controlled to run at the maximum power, the passenger compartment is controlled to be heated at the requested power, and the differential power is calculated, where the differential 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 the air conditioner heater has sufficient remaining power to heat the battery pack under the condition that the passenger compartment is heated with the requested power. Then determine the first target opening degree according to the temperature value of the battery pack body, and control the proportional valve in the heating circuit of the battery pack to open at the first target opening degree, and determine the opening degree of the proportional valve opening according to the temperature value of the battery pack body to ensure that On the premise of stable heating of the passenger compartment, efficient heating of the battery pack is achieved.

It can be understood that, for the beneficial effects of the foregoing second aspect to the fourth aspect, reference may be made to the relevant descriptions in the foregoing first aspect, and details are not described herein again.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

2 is a schematic flowchart of a vehicle heating control method provided by an embodiment of the present application;

3 is a schematic flowchart of a vehicle heating control method provided by another embodiment of the present application;

4 is a schematic flowchart of a vehicle heating control method provided by another embodiment of the present application;

5 is a schematic structural diagram of a vehicle heating control device provided by an embodiment of the present application;

6 is a schematic structural diagram of a vehicle heating control device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a vehicle heating control device provided by another embodiment of the present application.

Detailed ways

In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are set forth in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It is to be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described feature, integer, step, operation, element and/or component, but does not exclude one or more other The presence or addition of features, integers, steps, operations, elements, components and/or sets thereof.

It will also be understood that, as used in this specification and the appended claims, the term "and/or" refers to and including any and all possible combinations of one or more of the associated listed items.

As used in the specification of this application and the appended claims, the term "if" may be contextually interpreted as "when" or "once" or "in response to determining" or "in response to detecting." Similarly, the phrases "if it is determined" or "if the [described condition or event] is detected" may be interpreted, depending on the context, to mean "once it is determined" or "in response to the determination" or "once the [described condition or event] is detected. ]" or "in response to detection of the [described condition or event]".

In addition, in the description of the specification of the present application and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the description, and should not be construed as indicating or implying relative importance.

References in this specification to "one embodiment" or "some embodiments" and the like mean that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically emphasized otherwise. The terms "including", "including", "having" and their variants mean "including but not limited to" unless specifically emphasized otherwise.

FIG. 1 shows a schematic structural diagram of a vehicle provided by an embodiment of the present application. Referring to FIG. 1 , 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 , and the controller 10 is electrically connected to the heater 21 and the proportional valve 22 , respectively.

Wherein, when the controller 10 obtains the heating request of the battery pack, the controller 10 detects the heating state of the passenger compartment. When the heating state of the passenger compartment is on, the controller 10 controls the air conditioner heater 21 to run at the maximum power, controls the passenger compartment to heat at the requested power, and calculates the difference power, where the difference power is the maximum power and the requested power difference value. When the difference power is greater than the preset power value, it means that the air conditioner heater 21 can still heat the battery pack under the condition that the passenger compartment is heated with the requested power. The controller 10 controls the proportional valve 22 in the battery pack heating circuit to open at the first target opening degree according to the temperature value of the battery pack body, which can ensure that the heating of the battery will not affect the heating of the passenger compartment.

When the passenger compartment and the battery pack are heated at the same time, the controller 10 obtains the first temperature value and the second temperature value, and calculates the first heat value absorbed by the battery pack in the first time period according to the first temperature value and the second temperature value, The second calorific value is calculated according to 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 port of the battery pack, and the start of the first time period The start time 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-conditioning heater 21 operating with differential power in 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 adjusts the heating power of the battery pack by adjusting the opening of the proportional valve 22 in real time, ensuring that the passenger compartment is heated with the requested power, and improving the heating stability of the passenger compartment.

FIG. 2 shows a schematic flowchart of a vehicle heating control method provided by an embodiment of the present application. Referring to FIG. 2 , the vehicle heating control method may include steps S101 to S103 .

Step S101, when the heating request of the battery pack is obtained, the heating state of the passenger compartment is detected.

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

Step S102, when the heating state of the passenger compartment is on, control the air-conditioning heater to run at the maximum power, control the passenger compartment to heat with the requested power, and calculate the difference power, where the difference power is the difference between the maximum power and the requested power. difference.

Specifically, when the heating state of the passenger compartment is the ON state, it means that the air conditioner heater needs to heat the passenger compartment and the battery pack at the same time. At this time, the air-conditioning heater is controlled to run at the maximum power, and the passenger compartment is controlled to be heated at the requested power, so as to ensure the stable heating of the passenger compartment and prevent the temperature fluctuation of the passenger compartment.

The calculated differential power is the difference between the maximum power of the air conditioner heater and the requested power of the passenger compartment. The purpose of calculating the differential power is to determine whether there is sufficient extra power for the battery pack under the condition that the passenger compartment is guaranteed to operate at the requested power. to heat.

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.

Specifically, when the differential power is greater than the preset power value, it means that the air-conditioning heater has sufficient remaining power to heat the battery pack under the condition that the passenger compartment is heated with the requested power, that is, the air-conditioning heater uses the differential power to heat the battery pack. The heat generated by the power operation can meet the heating needs of the battery pack.

When it is determined that the air conditioner heater can heat the battery pack, the 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. This design can ensure that the proportional valve opening in the battery pack heating circuit is moderate, and prevent the proportional valve opening in the battery pack heating circuit from being too large, which will affect the heating power of the passenger compartment and cause temperature fluctuations in the passenger compartment.

Exemplarily, step S103 may specifically include step S1031 and step S1032.

Step S1031, determining a first target temperature range according to the temperature value of the battery pack body.

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

Step S1032, determining a first target opening degree according to the first target temperature range.

Specifically, after the first target temperature range is determined, the first target opening degree corresponding to the first target temperature range can be queried in the database in the form of a table lookup. The first target temperature range includes a first temperature range and a second temperature range, the first target opening includes a first opening and a second opening, the first temperature range corresponds to the first opening, and the second temperature range corresponds to the second opening. 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. That is, the lower the temperature value of the battery pack body, the smaller the determined first target opening degree. When the opening 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 of the passenger compartment heating, resulting in a decrease in the heating efficiency of the passenger compartment. Therefore, the lower the temperature value of the battery pack body, the smaller the opening degree of the control proportional valve when it is opened, which reduces the influence on the heating of the passenger compartment and ensures that the passenger compartment can be heated stably.

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

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

Temperature range of battery pack body Proportional valve opening 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

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

FIG. 3 shows a schematic flowchart of a vehicle heating control method provided by another embodiment of the present application. Referring to FIG. 3 , after step S103 , the vehicle heating control method further includes steps S104 and S105 .

Step S104: Obtain the first temperature value and the second temperature value, calculate the first heat value absorbed by the battery pack in 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.

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, and the starting moment of the first time period is the moment 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 with differential power in the first time period.

Exemplarily, the calculation formula of the first calorific value is Q1=C*ρ*v*(T1-T2), wherein Q1 is the first calorific value, C is the specific heat capacity of the liquid, ρ is the density of the liquid, and v is the The flow rate of the liquid flowing through the battery pack in 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 rotational speed of the water pump in the heating circuit of the battery pack is a constant speed, the specific rotational speed of the water pump can be preset, and the flow rate v can be obtained according to the rotational speed of the water pump.

The calculation formula of the second calorific value is M=P1*t, where M is the second calorific value, P1 is the differential power, and t is the duration of the first time period.

Step S105: Adjust the opening degree of the proportional valve according to the first temperature value, the first calorific value and the second calorific value.

Specifically, when the air conditioner heats the passenger compartment and the battery pack at the same time, it adjusts the opening of the proportional valve according to the first temperature value, the first calorific value and the second calorific value, so as to realize the real-time adjustment of the proportional valve and ensure the heating of the passenger compartment. On the premise of stability, improve the heating efficiency of the battery pack.

Exemplarily, step S105 may include steps S1051 to S1052.

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

Specifically, during the heating process of the battery pack by the air conditioner heater, the temperature of the liquid entering the battery pack has a certain limit, that is, the temperature of the body fluid at the liquid inlet of the battery pack cannot exceed a preset temperature value. The first temperature value is equal to the preset temperature value, indicating that the temperature of the liquid entering the battery pack meets the requirements. The first calorific value is less than or equal to the second calorific value, indicating that the air-conditioning heater can meet the heating requirements of the battery pack and the passenger compartment at the same time. At this time, the proportional valve is controlled to maintain the current opening, and both the battery and the passenger compartment can be heated stably.

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 is set to 40°C.

Step S1052, when the first temperature value is equal to the preset temperature value and the first calorific value is greater than the second calorific value, control the proportional valve to decrease the opening degree.

Specifically, when the first calorific value is greater than the second calorific value, it means that the heat generated by the air-conditioning heater operating at the differential power cannot meet the heating demand of the battery pack. If the opening of the proportional valve is maintained, the heating efficiency of the passenger compartment will be reduced. , causing temperature fluctuations in the passenger compartment. At this time, the proportional valve is controlled to reduce the opening degree, reducing the heating power of the battery pack, to ensure that the passenger compartment can still be heated with the requested power, and to ensure stable heating of the passenger compartment.

Exemplarily, step S105 may further include step S1053.

Step S1053, when the first temperature value is greater than the preset temperature value, control the proportional valve to decrease the opening degree.

Specifically, when the first temperature value is greater than the preset temperature value, it means that the temperature of the liquid entering the battery pack is too high, and there is a hidden danger that the heating liquid will cause damage to the battery pack. The flow rate of the body fluid plays a role in protecting the battery pack.

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

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

Specifically, the first temperature value is less than the preset temperature value, indicating that the temperature of the liquid entering the battery pack meets the requirements. The first calorific value is less than the second calorific value, which means that the heat generated by the air-conditioning heater is larger than the heat absorbed by the battery pack in addition to the heat required to ensure stable heating of the passenger compartment. At this time, the proportional valve is controlled to increase the opening degree. Improve the heating efficiency of the battery pack, so that the battery pack can heat up quickly, and at the same time, it can ensure the stable heating of the passenger compartment.

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

Specifically, the first calorific value is equal to the second calorific value, indicating that the heat generated by the air-conditioning heater is just enough to maintain the current heating demand of the passenger compartment and the battery pack. At this time, the proportional valve is controlled to maintain the current opening degree, and the air-conditioning heater continues to heat the battery pack. and stable heating of the crew compartment.

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

Specifically, the first calorific value is greater than the second calorific value, indicating that the heat generated by the air-conditioning heater cannot meet the heat demand for heating the passenger compartment and the battery pack, the battery pack will dissipate more heat, and the heating power of the passenger compartment will decrease. Causes the temperature of the passenger compartment to drop. At this time, the proportional valve is controlled to reduce the opening degree to reduce the heating power of the battery pack, so as to ensure that the passenger compartment can still be heated with the requested power and improve the heating stability of the passenger compartment.

FIG. 4 shows a schematic flowchart of a vehicle heating control method provided by another embodiment of the present application. Referring to FIG. 4 , after step S101 , the vehicle heating control method may further include steps S106 and S107 .

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

Specifically, when the heating state of the passenger compartment is in the off state, the air-conditioning heater heats the battery pack independently, and controls the air-conditioning heater to run at the maximum power. need. At this time, according to the temperature value of the battery pack body, the proportional valve in the battery pack heating circuit is controlled to open at the second target opening degree, and the opening degree of the proportional valve in the battery pack heating circuit is determined according to the different temperature values of the battery pack body, so as to realize the battery pack. rapid heating.

Exemplarily, step S106 may specifically include step S1061 and step S1062.

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

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

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

Specifically, when the second target temperature range is determined, the second target opening degree corresponding to the second target temperature range can be queried in the database in the form of a table lookup, and then the proportional valve is controlled to be opened 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 includes a third opening and a fourth opening, the third temperature range corresponds to the third opening, and the fourth temperature range corresponds to the fourth opening degree, any temperature value in the fourth temperature range is greater than any temperature value in 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 air conditioner heater provides heat to the battery pack body, which helps the battery pack body to heat up quickly to reach the set temperature value.

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

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:

Temperature range of battery pack body Proportional valve opening 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

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

Step S107, when the temperature value of the battery pack body reaches the target temperature value, the air conditioner heater is controlled to stop working.

Specifically, when the temperature value of the battery pack body reaches the target temperature value, it means that the temperature of the battery pack body meets the usage requirements. At this time, the air conditioner heater is controlled to stop working to complete the heating of the battery pack body.

It should be understood that the size of the sequence numbers of the steps in the above embodiments does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

FIG. 5 shows a schematic structural diagram of a vehicle heating control device provided by an embodiment of the present application. Referring to Figure 5, the vehicle heating control device includes:

The detection module 41 is configured to detect the heating state of the passenger compartment when the heating request of the battery pack is obtained;

The first calculation module 42 is configured to control the air-conditioning heater to run at the maximum power when the heating state of the passenger compartment is on, control the passenger compartment to be heated with the requested power, and calculate the difference power; The difference power is the difference between the maximum power and the requested power;

The first opening control module 43 is used to determine the first target opening degree according to the temperature value of the battery pack body when the differential power is greater than the preset power value, and control the proportional valve in the heating circuit of the battery pack to the first target opening degree. A target opening is turned on.

FIG. 6 shows a schematic structural diagram of a vehicle heating control device provided by an embodiment of the present application. Referring to Figure 6, the vehicle heating control device further includes:

The second calculation module 44 is configured to obtain a first temperature value and a second temperature value, and calculate a first heat value absorbed by the battery pack in a first time period according to the first temperature value and the second temperature value , calculate a second calorific 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, and the second temperature value is the liquid temperature value at the liquid outlet of the battery pack The temperature value of the body fluid, 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, the second heat is the heat generated by the air conditioner heater operating at the differential power during the first time period;

The 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.

In an embodiment of the present application, the adjustment module 45 is further used for:

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, controlling 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, the proportional valve is controlled to decrease the opening degree.

In an embodiment of the present application, the adjustment module 45 is further used for:

When the first temperature value is greater than a preset temperature value, the proportional valve is controlled to decrease the opening degree.

In an embodiment of the present application, the adjustment module 45 is further used for:

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

When the first temperature value is less than a preset temperature value and the first calorific value is equal to the second calorific value, controlling 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, the proportional valve is controlled to decrease the opening degree.

In an embodiment of the present application, the first opening control module 43 is further used for:

determining a first target temperature range according to the temperature value of the battery pack body;

determining 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 includes a first opening and a second opening, and the first temperature range corresponds to the first opening, 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. Spend.

FIG. 7 shows a schematic structural diagram of a vehicle heating control device provided by another embodiment of the present application. Referring to Figure 7, the vehicle heating control device further includes:

The second opening control module 46 is configured to control the air-conditioning heater to run at the maximum power when the heating state of the passenger compartment is in the off state, and control the heating circuit of the battery pack according to the temperature value of the battery pack body The proportional valve in is opened at the second target opening degree;

The stopping module 47 is configured to control the air conditioner heater to stop working when the temperature value of the battery pack body reaches a target temperature value.

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

determining a second target temperature range according to the temperature value of the battery pack body;

controlling 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 includes a third opening and a fourth opening, and the third temperature range corresponds to the third opening, The fourth temperature range corresponds to the fourth opening degree, any temperature value in the fourth temperature range is greater than any temperature value in the third temperature range, and the third opening degree is greater than the fourth opening degree. Spend.

It should be noted that the information exchange, execution process and other contents between the above-mentioned devices/units are based on the same concept as the method embodiments of the present application. For specific functions and technical effects, please refer to the method embodiments section. It is not repeated here.

Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated to different functional units, Module completion, that is, dividing the internal structure of the device into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment may be integrated in one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit, and the above-mentioned integrated units may adopt hardware. It can also be realized in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present application. For the specific working processes of the units and modules in the above-mentioned system, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the foregoing method embodiments can be implemented.

The embodiments of the present application provide a computer program product, when the computer program product runs on a mobile terminal, the steps in the foregoing method embodiments can be implemented when the mobile terminal executes the computer program product.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the present application realizes all or part of the processes in the methods of the above embodiments, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When executed by a processor, the steps of each of the above method embodiments can be implemented. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form, and the like. The computer-readable medium may include at least: any entity or device capable of carrying the computer program code to the terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media. For example, U disk, mobile hard disk, disk or CD, etc. In some jurisdictions, under legislation and patent practice, computer readable media may not be electrical carrier signals and telecommunications signals.

In the foregoing embodiments, the description of each embodiment has its own emphasis. For parts that are not described or described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In the embodiments provided in this application, it should be understood that the disclosed apparatus/network device and method may be implemented in other manners. For example, the apparatus/network device embodiments described above are only 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, such as multiple units. Or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

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

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that: it can still be used for the above-mentioned implementations. The technical solutions described in the examples are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the application, and should be included in the within the scope of protection of this application.

Claims (10)

1. A vehicle heating control method, characterized in that, comprising: When the heating request of the battery pack is obtained, the heating state of the passenger compartment is detected; When the heating state of the passenger compartment is on, the air conditioner heater is controlled to run at the maximum power, the passenger compartment is controlled to be heated at the requested power, and the differential power is calculated; wherein, the differential power is the maximum power the difference between the power and the requested power; When the differential power is greater than the preset power value, the 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 be opened at the first target opening degree. 2 . The vehicle heating control method according to claim 1 , wherein after the proportional valve in the control battery pack heating circuit is opened at the first target opening degree, the method further comprises: 3 . Obtain a first temperature value and a second temperature value, calculate a first heat value absorbed by the battery pack in a first time period according to the first temperature value and the second temperature value, and calculate according to the difference power The second calorific value; 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, and the first temperature value is the temperature value of the body fluid at the liquid outlet of the battery pack. The start time of a 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 when the air conditioner heater is at heat generated by operating at the differential power during the first time period; The opening degree of the proportional valve is adjusted according to the first temperature value, the first heat value and the second heat value. 3 . The vehicle heating control method according to claim 2 , wherein the opening degree of the proportional valve is adjusted according to the first temperature value, the first calorific value and the second calorific value. 4 . ,include: 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, controlling 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, the proportional valve is controlled to decrease the opening degree. 4 . The vehicle heating control method according to claim 2 , wherein the opening degree of the proportional valve is adjusted according to the first temperature value, the first calorific value and the second calorific value. 5 . ,include: When the first temperature value is greater than a preset temperature value, the proportional valve is controlled to decrease the opening degree. 5 . The vehicle heating control method according to claim 2 , wherein the opening degree of the proportional valve is adjusted according to the first temperature value, the first calorific value and the second calorific value. 6 . ,include: When the first temperature value is less than a preset temperature value and the first heat value is less than the second heat value, controlling the proportional valve to increase the opening degree; When the first temperature value is less than a preset temperature value and the first calorific value is equal to the second calorific value, controlling 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, the proportional valve is controlled to decrease the opening degree. 6 . The vehicle heating control method according to claim 1 , wherein the determining the first target opening degree according to the temperature value of the battery pack body comprises: 6 . determining a first target temperature range according to the temperature value of the battery pack body; determining 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 includes a first opening and a second opening, and the first temperature range corresponds to the first opening, 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. Spend. 7. The vehicle heating control method according to any one of claims 1 to 6, wherein when the heating request of the battery pack is acquired, after detecting the heating state of the passenger compartment, the method further comprises: When the heating state of the passenger compartment is in the off state, the air conditioner heater is controlled to run at the maximum power, and the proportional valve in the battery pack heating circuit is controlled to open at the second target according to the temperature value of the battery pack body. degree open; When the temperature value of the battery pack body reaches the target temperature value, the air conditioner heater is controlled to stop working. 8 . The vehicle heating control method according to claim 7 , wherein 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 comprises: 8 . determining a second target temperature range according to the temperature value of the battery pack body; controlling 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 includes a third opening and a fourth opening, and the third temperature range corresponds to the third opening, The fourth temperature range corresponds to the fourth opening degree, any temperature value in the fourth temperature range is greater than any temperature value in the third temperature range, and the third opening degree is greater than the fourth opening degree. Spend. 9. A vehicle heating control device, comprising: The detection module is used to detect the heating state of the passenger compartment when the heating request of the battery pack is obtained; a first calculation module, configured to control the air-conditioning heater to run at the maximum power when the heating state of the passenger compartment is in the on state, control the passenger compartment to be heated at the requested power, and calculate the difference power; wherein, the The difference power is the difference between the maximum power and the requested power; The first opening control module is used to determine the first target opening degree according to the temperature value of the battery pack body when the differential power is greater than the preset power value, and control the proportional valve in the heating circuit of the battery pack to the first target opening degree. The target opening is turned on. 10. A vehicle, comprising a controller and an air-conditioning system, the air-conditioning system comprising a heater and a proportional valve, the controller being electrically connected to the heater and the proportional valve respectively, the controller using for carrying out the method of any one of claims 1 to 8.

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