Vehicle control method and vehicle

Abstract

The invention relates to the technical field of vehicles, in particular to a vehicle control method and a vehicle, and aims to solve the problem that a battery heating mode of an existing vehicle cannot give consideration to high power and low energy consumption at the same time. In order to achieve the purpose, the vehicle comprises an air conditioning system, a battery and an electric heating device, and both the air conditioning system and the electric heating device can heat the battery; the control method comprises the steps that when a battery needs to be heated, the running state of the air conditioner system is obtained; selectively executing a heat pump heating mode or an electric heating mode according to the running state of the air conditioning system; wherein in the heat pump heating mode, the air conditioning system is controlled to heat the battery; and in the electric heating mode, the electric heating device is controlled to heat the battery. Through the arrangement, two battery heating modes are provided, and the two battery heating modes are reasonably controlled, so that the heating efficiency is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, specifically providing a vehicle control method and a vehicle. Background Technology

[0002] Ambient temperature has a significant impact on vehicle battery performance. Excessively low ambient temperatures can drastically reduce battery capacity, charge / discharge performance, and lifespan. Therefore, to ensure the power and range of electric vehicles, the vehicle battery needs to operate at an ideal ambient temperature, especially in cold winter weather when the ambient temperature is far below the battery's ideal temperature. In such cases, battery heating is necessary. Existing battery heating methods mainly include PTC heating or motor heating.

[0003] However, existing vehicle battery heating methods cannot simultaneously meet the requirements of high power and low energy consumption.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the existing vehicle battery heating method cannot simultaneously achieve high power and low energy consumption.

[0006] In a first aspect, the present invention provides a vehicle control method, the vehicle including an air conditioning system, a battery, and an electric heating device, both the air conditioning system and the electric heating device being capable of heating the battery; the control method includes: when it is necessary to heat the battery, acquiring the operating status of the air conditioning system; selectively executing a heat pump heating mode or an electric heating mode according to the operating status of the air conditioning system; wherein, in the heat pump heating mode, controlling the air conditioning system to heat the battery; and in the electric heating mode, controlling the electric heating device to heat the battery.

[0007] In the preferred embodiment of the above control method, the step of "selectively executing heat pump heating mode or electric heating mode according to the operating state of the air conditioning system" specifically includes: if the operating state of the air conditioning system is off, then the heat pump heating mode is executed; and / or if the operating state of the air conditioning system is on, then the electric heating mode is executed.

[0008] In the preferred embodiment of the above control method, the step of "selectively executing a heat pump heating mode or an electric heating mode according to the operating state of the air conditioning system" specifically includes: if the operating state of the air conditioning system is a shutdown state, then executing the heat pump heating mode; and / or if the operating state of the air conditioning system is a startup state, then further obtaining the operating mode of the air conditioning system, the operating mode of the air conditioning system including a cooling mode and a heating mode; and selectively executing the heat pump heating mode or the electric heating mode according to the operating mode.

[0009] In the preferred embodiment of the above control method, the step of "selectively executing the heat pump heating mode or the electric heating mode according to the operating mode" specifically includes: if the operating mode is a cooling mode, then the electric heating mode is executed; and / or if the operating mode is a heating mode, then the heat pump heating mode is executed.

[0010] In the preferred embodiment of the above control method, the step of "selectively executing the heat pump heating mode or the electric heating mode according to the operating mode" specifically includes: if the operating mode is a cooling mode, then executing the electric heating mode; and / or if the operating mode is a heating mode, then further obtaining the energy consumption of the air conditioning system simultaneously heating the battery and the vehicle cabin, denoted as the first energy consumption; obtaining the sum of the energy consumption of the electric heating device heating the battery alone and the energy consumption of the air conditioning system heating the cabin only, denoted as the second energy consumption; comparing the first energy consumption with the second energy consumption; and selectively executing the heat pump heating mode or the electric heating mode according to the comparison result.

[0011] In the preferred embodiment of the above control method, the step of "selectively executing the heat pump heating mode or the electric heating mode according to the comparison result" specifically includes: if the first energy consumption is higher than the second energy consumption, then the electric heating mode is executed; and / or if the first energy consumption is not higher than the second energy consumption, then the heat pump heating mode is executed.

[0012] In the preferred embodiment of the above control method, the step of "selectively executing the heat pump heating mode or the electric heating mode according to the comparison result" specifically includes: if the first energy consumption is higher than the second energy consumption, then the electric heating mode is executed; and / or if the first energy consumption is not higher than the second energy consumption, then the target operating parameters of the compressor of the air conditioning system are further obtained if the air conditioning system simultaneously heats the battery and the cabin; the target operating parameters are compared with a preset upper limit operating parameter; if the target operating parameter is not greater than the preset upper limit operating parameter, then the heat pump heating mode is executed; and / or if the target operating parameter is greater than the preset upper limit operating parameter, then the electric heating mode is executed.

[0013] In a preferred embodiment of the above control method, during the execution of the heat pump heating mode, the control method of the present invention further includes: obtaining the target heating power of the air conditioning system for simultaneously heating the battery and the cabin; obtaining the actual heating power of the air conditioning system; comparing the target heating power with the actual heating power; if the target heating power is greater than the actual heating power, then simultaneously executing the heat pump heating mode and the electric heating mode; and / or if the target heating power is not greater than the actual heating power, then only executing the heat pump heating mode.

[0014] In a preferred embodiment of the above control method, the control method of the present invention further includes: obtaining the actual temperature of the battery; comparing the actual temperature with a preset temperature; and determining that the battery needs to be heated if the actual temperature is lower than the preset temperature.

[0015] In a second aspect, the present invention provides a vehicle including a controller configured to perform the above-described control method.

[0016] In a third aspect, the present invention provides a vehicle comprising: an air conditioning system including a compressor, a condenser, and a battery heat exchanger, wherein the exhaust port of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the battery heat exchanger, and the outlet of the battery heat exchanger is connected to the air inlet of the compressor; and a battery heat exchange system connected to the battery heat exchanger for heat exchange, wherein the battery heat exchange system is capable of heating the battery of the vehicle.

[0017] In the preferred embodiment of the above-mentioned vehicle, the air conditioning system further includes a first control valve, the inlet of which is connected to the exhaust port of the compressor, and the outlet of which is connected to the air inlet of the compressor, so as to directly introduce some high-pressure gas into the air inlet of the compressor and increase the intake pressure of the compressor.

[0018] In the preferred embodiment of the above-mentioned vehicle, the air conditioning system further includes an evaporator, a second control valve, and a third control valve. The inlet of the second control valve is connected to the outlet of the condenser, the outlet of the second control valve is connected to the inlet of the evaporator, the outlet of the evaporator is connected to the air inlet of the compressor, the inlet of the third control valve is connected to the outlet of the condenser, and the outlet of the third control valve is connected to the inlet of the battery heat exchanger.

[0019] In a preferred embodiment of the vehicle described above, the vehicle further includes an electric heating device capable of heating the battery.

[0020] With the above technical solution adopted, the vehicle of the present invention includes an air conditioning system, a battery, and an electric heating device, both of which can heat the battery. The control method of the present invention includes: when it is necessary to heat the battery, acquiring the operating status of the air conditioning system; selectively executing a heat pump heating mode or an electric heating mode according to the operating status of the air conditioning system; wherein, in the heat pump heating mode, controlling the air conditioning system to heat the battery; and in the electric heating mode, controlling the electric heating device to heat the battery. Through this configuration, the air conditioning system can heat both the cabin and the battery. Furthermore, by combining this with the electric heating device, the vehicle possesses two battery heating modes, allowing the vehicle to select the appropriate battery heating mode according to different operating conditions, thereby increasing heating power and reducing energy consumption.

[0021] Furthermore, the control method of the present invention further includes: if the air conditioning system is in a stopped state, then a heat pump heating mode is executed; and / or if the air conditioning system is in a powered-on state, then an electric heating mode is executed. This configuration allows the vehicle to prioritize the heat pump heating mode when the battery needs heating, thereby improving heating efficiency and reducing energy consumption; while when the cabin also requires heating, the air conditioning system prioritizes meeting the cabin's heating needs, thus selecting an electric heating device to heat the battery, achieving a reasonable allocation between the two battery heating modes.

[0022] Furthermore, the control method of the present invention further includes: if the air conditioning system is in a stopped state, then executing a heat pump heating mode; and / or if the air conditioning system is in a started state, then further acquiring the operating mode of the air conditioning system, the operating mode of the air conditioning system including a cooling mode and a heating mode; and selectively executing a heat pump heating mode or an electric heating mode according to the operating mode.

[0023] Furthermore, the control method of the present invention further includes: if the operating mode is cooling mode, then executing electric heating mode; and / or if the operating mode is heating mode, then executing heat pump heating mode. By operating heat pump heating mode in the heating mode of the air conditioner, the heating capacity of the air conditioning system can be fully utilized, which is beneficial to maximizing heat utilization.

[0024] Furthermore, the control method of the present invention further includes: if the operating mode is a cooling mode, then executing an electric heating mode; and / or if the operating mode is a heating mode, then further acquiring the energy consumption of the air conditioning system simultaneously heating the battery and the vehicle cabin, denoted as the first energy consumption; acquiring the sum of the energy consumption of the electric heating device heating the battery alone and the energy consumption of the air conditioning system heating the cabin only, denoted as the second energy consumption; comparing the first energy consumption with the second energy consumption; and selectively executing a heat pump heating mode or an electric heating mode based on the comparison result. With this setup, when the air conditioning system is in heating mode, an energy consumption comparison between the two heating modes is added to select the heating mode with optimal energy consumption.

[0025] Furthermore, the control method of the present invention further includes: if the first energy consumption is higher than the second energy consumption, then an electric heating mode is executed; and / or if the first energy consumption is not higher than the second energy consumption, then a heat pump heating mode is executed. With this configuration, based on the principle of energy optimization, the total energy consumed by the two heating modes when providing the same heat to the battery and cabin is compared, so that the system can select the battery heating mode with the highest energy efficiency.

[0026] Furthermore, the control method of the present invention further includes: if the first energy consumption is higher than the second energy consumption, then an electric heating mode is executed; and / or if the first energy consumption is not higher than the second energy consumption, then the target operating parameters of the air conditioning system compressor are further obtained if the air conditioning system simultaneously heats the battery and the cabin; the target operating parameters are compared with a preset upper limit operating parameter; if the target operating parameter is not greater than the preset upper limit operating parameter, then a heat pump heating mode is executed; and / or if the target operating parameter is greater than the preset upper limit operating parameter, then an electric heating mode is executed. With this setting, after running the heat pump heating mode under optimal energy consumption, it is determined whether the compressor's workload exceeds its maximum load, thus avoiding affecting the battery heating effect due to exceeding the compressor's load.

[0027] Furthermore, during the execution of the heat pump heating mode, the control method of the present invention further includes: obtaining the target heating power of the air conditioning system for simultaneously heating the battery and the cabin; obtaining the actual heating power of the air conditioning system; comparing the target heating power with the actual heating power; if the target heating power is greater than the actual heating power, then simultaneously executing the heat pump heating mode and the electric heating mode; and / or if the target heating power is not greater than the actual heating power, then only executing the heat pump heating mode. With this configuration, during the operation of the heat pump heating mode, when the battery heating power is insufficient, the electric heating device can be promptly controlled to intervene and supplement heat. On the one hand, the cabin's heating needs are prioritized; on the other hand, the battery heating power is ensured to be stable, enabling the battery to heat up quickly.

[0028] Furthermore, the control method of the present invention also includes: acquiring the actual temperature of the battery; comparing the actual temperature with a preset temperature; and determining that the battery needs to be heated if the actual temperature is lower than the preset temperature. This setting provides a trigger condition for automatic battery heating, enabling the system to automatically intervene to heat the battery when the temperature is too low, and automatically stop heating once the battery reaches the ideal operating temperature, without any manual intervention. This improves the vehicle's intelligence level and ensures stable battery performance.

[0029] Furthermore, the vehicle provided by the present invention, based on the above control method, possesses the technical effects of the above control method. Compared with the vehicle before the improvement, the vehicle of the present invention can achieve rapid battery heating in low-temperature environments, enabling the battery to quickly enter the ideal working state, thereby improving the vehicle's power and range, while maximizing energy savings.

[0030] Solution 1. A vehicle control method, characterized in that the vehicle includes an air conditioning system, a battery, and an electric heating device, wherein both the air conditioning system and the electric heating device are capable of heating the battery;

[0031] The control method includes:

[0032] When the battery needs to be heated, the operating status of the air conditioning system is obtained;

[0033] Depending on the operating status of the air conditioning system, either heat pump heating mode or electric heating mode may be selectively executed.

[0034] In the heat pump heating mode, the air conditioning system is controlled to heat the battery.

[0035] In the electric heating mode, the electric heating device is controlled to heat the battery.

[0036] Solution 2. The control method according to Solution 1, characterized in that the step of "selectively executing heat pump heating mode or electric heating mode according to the operating state of the air conditioning system" specifically includes:

[0037] If the air conditioning system is in a stopped state, then the heat pump heating mode is executed; and / or

[0038] If the air conditioning system is in the on state, then the electric heating mode is executed.

[0039] Solution 3. The control method according to Solution 1, characterized in that the step of "selectively executing heat pump heating mode or electric heating mode according to the operating state of the air conditioning system" specifically includes:

[0040] If the air conditioning system is in a stopped state, then the heat pump heating mode is executed; and / or

[0041] If the air conditioning system is in the on state, then the operating mode of the air conditioning system is further obtained, which includes cooling mode and heating mode.

[0042] Depending on the operating mode, the heat pump heating mode or the electric heating mode may be selectively executed.

[0043] Solution 4. The control method according to Solution 3, characterized in that the step of "selectively executing the heat pump heating mode or the electric heating mode according to the operating mode" specifically includes:

[0044] If the operating mode is cooling mode, then the electric heating mode is executed; and / or

[0045] If the operating mode is heating mode, then the heat pump heating mode is executed.

[0046] Solution 5. The control method according to Solution 3, characterized in that the step of "selectively executing the heat pump heating mode or the electric heating mode according to the operating mode" specifically includes:

[0047] If the operating mode is cooling mode, then the electric heating mode is executed; and / or

[0048] If the operating mode is heating mode, then the energy consumption of the air conditioning system in heating the battery and the vehicle cabin at the same time is further obtained and recorded as the first energy consumption.

[0049] The sum of the energy consumption of the electric heating device heating the battery alone and the energy consumption of the air conditioning system heating the cabin alone is recorded as the second energy consumption.

[0050] Compare the first energy consumption with the second energy consumption;

[0051] Based on the comparison results, the heat pump heating mode or the electric heating mode may be selectively executed.

[0052] Solution 6. The control method according to Solution 5, characterized in that the step of "selectively executing the heat pump heating mode or the electric heating mode according to the comparison result" specifically includes:

[0053] If the first energy consumption is higher than the second energy consumption, then the electric heating mode is executed; and / or

[0054] If the first energy consumption is not higher than the second energy consumption, then the heat pump heating mode is executed.

[0055] Solution 7. The control method according to Solution 5, characterized in that the step of "selectively executing the heat pump heating mode or the electric heating mode according to the comparison result" specifically includes:

[0056] If the first energy consumption is higher than the second energy consumption, then the electric heating mode is executed; and / or

[0057] If the first energy consumption is not higher than the second energy consumption, then the target operating parameters of the air conditioning system compressor are further obtained if the air conditioning system heats both the battery and the cabin simultaneously.

[0058] The target operating parameters are compared with the preset upper limit operating parameters;

[0059] If the target operating parameter is not greater than the preset upper limit operating parameter, then the heat pump heating mode is executed; and / or

[0060] If the target operating parameter is greater than the preset upper limit operating parameter, then the electric heating mode is executed.

[0061] Solution 8. The control method according to any one of Solutions 1 to 7, characterized in that, during the execution of the heat pump heating mode, the control method of the present invention further includes:

[0062] Obtain the target heating power of the air conditioning system to simultaneously heat the battery and the cabin;

[0063] Obtain the actual heating power of the air conditioning system;

[0064] Compare the target heating power with the actual heating power;

[0065] If the target heating power is greater than the actual heating power, then both the heat pump heating mode and the electric heating mode are executed simultaneously; and / or

[0066] If the target heating power is not greater than the actual heating power, then only the heat pump heating mode is executed.

[0067] Scheme 9. The control method according to any one of Schemes 1 to 7, characterized in that the control method of the present invention further includes:

[0068] Obtain the actual temperature of the battery;

[0069] Compare the actual temperature with the preset temperature;

[0070] If the actual temperature is lower than the preset temperature, it is determined that the battery (4) needs to be heated.

[0071] Option 10. A vehicle, characterized in that the vehicle includes a controller configured to perform the control method of any one of Options 1 to 9.

[0072] Option 11. A vehicle, characterized in that the vehicle comprises: an air conditioning system, the air conditioning system comprising a compressor, a condenser, and a battery heat exchanger, wherein the exhaust port of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the battery heat exchanger, and the outlet of the battery heat exchanger is connected to the air inlet of the compressor; and

[0073] A battery heat exchange system is provided, which is connected to the battery heat exchanger for heat exchange and is capable of heating the battery of the vehicle.

[0074] Option 12. The vehicle according to Option 11, characterized in that the air conditioning system further includes a first control valve, the inlet of the first control valve being connected to the exhaust port of the compressor, and the outlet of the first control valve being connected to the air inlet of the compressor, so as to directly introduce a portion of high-pressure gas into the air inlet of the compressor to increase the intake pressure of the compressor.

[0075] Option 13. The vehicle according to Option 12, characterized in that the air conditioning system further includes an evaporator, a second control valve, and a third control valve, wherein the inlet of the second control valve is connected to the outlet of the condenser, the outlet of the second control valve is connected to the inlet of the evaporator, and the outlet of the evaporator is connected to the air inlet of the compressor.

[0076] The inlet of the third control valve is connected to the outlet of the condenser, and the outlet of the third control valve is connected to the inlet of the battery heat exchanger.

[0077] Option 14. The vehicle according to any one of Options 11 to 13, characterized in that the vehicle further includes an electric heating device capable of heating the battery. Attached Figure Description

[0078] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0079] Figure 1 This is a schematic diagram of the heat exchange between the air conditioning system and the battery of the present invention;

[0080] Figure 2 This is a flowchart of the vehicle control method of the present invention;

[0081] Figure 3 This is a flowchart of a first embodiment of the vehicle control method of the present invention;

[0082] Figure 4 This is a flowchart of a second embodiment of the vehicle control method of the present invention;

[0083] Figure 5 This is a flowchart of a third embodiment of the vehicle control method of the present invention;

[0084] Figure 6 This is a flowchart of Embodiment 4 of the vehicle control method of the present invention.

[0085] List of reference numerals in the attached diagram:

[0086] 1. Compressor; 2. Condenser; 3. Battery heat exchanger; 4. Battery; 5. Liquid cooling plate; 6. Evaporator; 71. First control valve; 72. Second control valve; 73. Third control valve. Detailed Implementation

[0087] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0088] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0089] As pointed out in the background art, existing vehicle battery heating methods cannot simultaneously achieve high power and low energy consumption. This invention provides a vehicle control method and a vehicle designed to connect the battery to the air conditioning system for heat exchange, utilizing the heat generated by the air conditioning system to heat the battery. Combined with the existing electric heating system, this allows for the combined use of two heating modes. The operation of both heating modes can be rationally controlled according to different environments and operating conditions, improving battery heating power while saving energy.

[0090] Because ambient temperature has a significant impact on vehicle battery performance, excessively low ambient temperatures can drastically reduce battery capacity, charge / discharge performance, and lifespan, thereby decreasing the vehicle's charging speed, power performance, and range. Therefore, to ensure that electric vehicles can fully utilize their performance, the battery needs to operate at an ideal ambient temperature. For example, in cold winter driving conditions, where the ambient temperature is far below the battery's ideal temperature, the battery needs to be heated.

[0091] Current mainstream heating methods involve adding water-based PTCs or water-side condensers, but this makes the water circulation system relatively complex, increasing the production cost and difficulty of the heating system. At the same time, as current power batteries become increasingly larger, they require higher heating power, leading to a significant increase in heating energy consumption. This makes it impossible for existing heating systems to simultaneously meet the requirements of high power and low energy consumption.

[0092] Furthermore, in existing technologies, the heat exchange between the air conditioning system and the battery heat exchange system is limited to cooling the battery under high-temperature conditions.

[0093] Based on the vehicle's existing air conditioning system and battery heat exchange system, and using the current heat pump cycle system, this invention adds a high-efficiency, high-power battery heating mode without adding any parts. That is, the battery is heated by the heat generated by the air conditioning system during the heating process. By utilizing the high thermal efficiency of the heat pump system, the battery heating power is increased while the heating energy consumption is reduced.

[0094] Specifically, such as Figure 1 As shown, the vehicle's air conditioning system includes a compressor 1, a condenser 2, a battery heat exchanger 3, an evaporator 6, and a first control valve 71, a second control valve 72, and a third control valve 73. By controlling the opening and closing of different control valves, the compressor 1 can be connected to different heat exchangers, thereby forming multiple heat exchange cycles to meet the heating and cooling needs of the cabin and battery.

[0095] The battery heat exchange system is configured as a circulating water circuit consisting of a liquid cooling plate 5, pipelines and a water pump (not shown in the figure). By heating or cooling the water flow in the circulating water circuit, the heat exchange between the water flow and the battery 4 is utilized to achieve the purpose of heating or cooling the battery 4. This invention provides two battery heating systems. One system connects an air conditioning system to a circulating water circuit for heat exchange, utilizing the heat generated by the compressor 1 to heat the water flow in the circulating water circuit. Preferably, as shown... Figure 1 As shown, the exhaust port of compressor 1 is connected to the inlet of condenser 2, the outlet of condenser 2 is connected to the inlet of third control valve 73, the outlet of third control valve 73 is connected to the inlet of battery heat exchanger 3, and the outlet of battery heat exchanger 3 is connected to the air inlet of compressor 1, thereby forming a battery heating cycle.

[0096] The exhaust port of compressor 1 is also connected to the inlet of the first control valve 71, and the outlet of the first control valve 71 is connected to the air inlet of compressor 1, thereby forming a pressure boosting cycle, which can directly introduce the high-pressure gas discharged by compressor 1 into the air inlet of compressor 1 to increase the air inlet pressure of compressor 1.

[0097] The outlet of condenser 2 is also connected to the inlet of the second control valve 72, the outlet of the second control valve 72 is connected to the inlet of evaporator 6, and the outlet of evaporator 6 is connected to the air inlet of compressor 1, thus forming a heat exchange cycle for cabin air conditioning.

[0098] The circulating water path of the battery heat exchange system passes through the battery heat exchanger 3, enabling heat exchange with the battery heat exchanger 3.

[0099] When the air conditioning system is used to heat battery 4, such as Figure 1 As shown, the inlet of the battery heat exchanger 3 is connected to the outlet of the condenser 2 by the third control valve 73, the pressure boosting cycle is connected by opening the first control valve 71, and the connection between the inlet of the evaporator 6 and the condenser 2 is disconnected by opening the second control valve 72. The compressor 1, condenser 2 and battery heat exchanger 3 are connected in series to form a heating cycle. The compressor 1 performs work to make the high-temperature refrigerant flow through the condenser 2 and battery heat exchanger 3 in sequence, so that the condenser 2 and battery heat exchanger 3 are heated at the same time to heat the cabin and battery 4, thus forming the heat pump heating mode of battery 4.

[0100] It should be noted that in the heat pump heating mode of battery 4, the first control valve 71 can divide the high-temperature, high-pressure gas discharged from compressor 1 into two parts. One part enters condenser 2 for heating circulation, while the other part returns directly to compressor 1 through the first control valve 71, thereby increasing the intake pressure of compressor 1 and improving its efficiency. For example, under low-temperature conditions, the compressor intake pressure is only 1 MPa, which can be increased to 6 MPa by adding a booster cycle.

[0101] Another method is to heat the water flow in the circulating water circuit through an electric heating device (such as a stalled motor or PTC), thus forming the electric heating mode of battery 4.

[0102] The two heating modes can operate independently or in combination. By properly controlling the operation of the two heating modes, heating efficiency can be improved and energy consumption reduced under different heating requirements of the cabin and battery.

[0103] like Figure 2 As shown, the control method provided by the above two heating systems in this invention includes:

[0104] S1000: Obtain the operating status of the air conditioning system when it is necessary to heat the battery;

[0105] S2000: Depending on the operating status of the air conditioning system, selectively execute heat pump heating mode or electric heating mode.

[0106] In other words, when battery heating is required, it can be achieved either through an air conditioning system or through an electric heating device, depending on the operating status of the air conditioning system. The control method of this invention will be described in detail below with reference to several specific embodiments.

[0107] Example 1

[0108] like Figure 3 As shown, the control method in this embodiment includes:

[0109] S1000: Obtain the operating status of the air conditioning system when it is necessary to heat the battery;

[0110] S2100: If the air conditioning system is in a stopped state, then the heat pump heating mode will be executed;

[0111] S2200: If the air conditioning system is in the on state, then the electric heating mode will be executed.

[0112] When the battery needs to be heated, the system checks whether the air conditioning system is on. If the air conditioning system is on, it means that the air conditioning system is heating the cabin. The heating mode of battery 4 is selected based on the operating status of the air conditioning system. This is based on whether the heating capacity of the air conditioning system can meet the heating needs of both the cabin and battery 4 at the same time. Since the air conditioning system is set to prioritize the heating needs of the cabin, when the total heat demand of the cabin and battery 4 exceeds the maximum heating capacity of the air conditioning system, the heat distributed to battery 4 will be insufficient, thus preventing battery 4 from reaching the ideal operating temperature.

[0113] To prevent the above situations from occurring, the control method of the present invention prioritizes the use of heat pump heating mode to heat battery 4 when there is no need for heating in the cabin, thereby reducing energy consumption by utilizing the high thermal efficiency of the heat pump system; while when there is a need for heating in the cabin, the electric heating mode is selected to heat battery 4, ensuring that battery 4 heats up normally first.

[0114] Example 2

[0115] like Figure 4 As shown, the control method in this embodiment includes:

[0116] S1000: Obtain the operating status of the air conditioning system when it is necessary to heat the battery;

[0117] S2100: If the air conditioning system is in a stopped state, then the heat pump heating mode will be executed;

[0118] S2200: If the air conditioning system is in the on state, then further obtain the operating mode of the air conditioning system, that is, determine whether the operating mode of the air conditioning system is cooling mode or heating mode.

[0119] S2310: If the operating mode is cooling mode, then the electric heating mode will be executed;

[0120] S2320: If the operating mode is heating mode, then the heat pump heating mode will be executed.

[0121] Based on the structural characteristics of the air conditioning system, the condenser 2 and the battery heat exchanger 3 in the vehicle heat up simultaneously. Therefore, the battery 4 can only be heated when the air conditioning system heats the cabin. This connection method of the heat pump heating mode can make full use of the heating capacity of the air conditioning system, which is conducive to maximizing heat utilization.

[0122] Example 3

[0123] like Figure 5 As shown, the control method in this embodiment includes:

[0124] S1000: Obtain the operating status of the air conditioning system when it is necessary to heat the battery;

[0125] S2100: If the air conditioning system is in a stopped state, then the heat pump heating mode will be executed;

[0126] S2200: If the air conditioning system is in the on state, then the operating mode of the air conditioning system is further obtained. The operating mode of the air conditioning system includes cooling mode and heating mode.

[0127] S2310: If the operating mode is cooling mode, then the electric heating mode will be executed;

[0128] S2320: If the operating mode is heating mode, then the energy consumption of the air conditioning system to heat the battery and the vehicle cabin at the same time is further obtained and recorded as the first energy consumption.

[0129] S2330: The sum of the energy consumption of the electric heating device heating the battery alone and the energy consumption of the air conditioning system heating the cabin alone is recorded as the second energy consumption.

[0130] S2340: Compare the first energy consumption with the second energy consumption;

[0131] S2351: If the first energy consumption is higher than the second energy consumption, then the electric heating mode is executed;

[0132] S2352: If the first energy consumption is not higher than the second energy consumption, then execute the heat pump heating mode.

[0133] Specifically, if the air conditioning system is in heating mode, that is, when both the cabin and battery 4 have heating needs, the system will evaluate the total energy consumption of the two battery heating modes before selecting the heating mode of battery 4, so that the system can select the optimal heating method.

[0134] For example, the method includes obtaining the heat required by the cabin based on parameters such as the actual temperature of the cabin, the target temperature, the ambient temperature, and the vehicle speed, and recording it as the cabin heating amount; at the same time, the method includes obtaining the heat required by the battery 4 based on the actual temperature of the battery, the target temperature of the battery, the ambient temperature, and the charge level, and recording it as the battery heating amount.

[0135] In addition, the heating efficiency of different heating systems is combined: the efficiency of the air conditioning system when heating the cabin alone is recorded as the first heating efficiency; the heating efficiency of the air conditioning system when heating the cabin and battery 4 at the same time is recorded as the second heating efficiency; and the heating efficiency of the electric heating device when heating battery 4 is recorded as the third heating efficiency.

[0136] For example, the first heating efficiency is about 1.8, the second heating efficiency is about 0.9, and the third heating efficiency is about 0.6.

[0137] The energy consumption of the air conditioning system when heating the cabin alone can be obtained by measuring the cabin heating capacity and the first heating efficiency.

[0138] The total energy consumption of the air conditioning system when heating the cabin and battery 4 simultaneously can be obtained by measuring the cabin heating capacity, battery heating capacity, and second heating efficiency.

[0139] The energy consumption of the electric heating device when heating the battery alone can be obtained by measuring the battery heating capacity and the third heating efficiency.

[0140] Thus, the first energy consumption and the second energy consumption are obtained.

[0141] This setup allows the system to compare the total energy consumed by the two heating modes when providing the same amount of heat to the battery and cabin, based on the principle of energy optimization, so that the system can select the battery heating mode with the highest energy efficiency.

[0142] Example 4

[0143] like Figure 6 As shown, the control method in this embodiment includes:

[0144] S1000: Obtain the operating status of the air conditioning system when it is necessary to heat the battery;

[0145] S2100: If the air conditioning system is in a stopped state, then the heat pump heating mode will be executed;

[0146] S2200: If the air conditioning system is in the on state, then the operating mode of the air conditioning system is further obtained. The operating mode of the air conditioning system includes cooling mode and heating mode.

[0147] S2310: If the operating mode is cooling mode, then the electric heating mode will be executed;

[0148] S2320: If the operating mode is heating mode, then the energy consumption of the air conditioning system to heat the battery and the vehicle cabin at the same time is further obtained and recorded as the first energy consumption.

[0149] S2330: The sum of the energy consumption of the electric heating device heating the battery alone and the energy consumption of the air conditioning system heating the cabin alone is recorded as the second energy consumption.

[0150] S2340: Compare the first energy consumption with the second energy consumption;

[0151] S2351: If the first energy consumption is higher than the second energy consumption, then the electric heating mode is executed;

[0152] S2352: If the first energy consumption is not higher than the second energy consumption, then further obtain the target operating parameters of the air conditioning system compressor if the air conditioning system heats both the battery and the cabin at the same time.

[0153] S2353: Compare the target operating parameters with the preset upper limit operating parameters;

[0154] S2354: If the target operating parameter is not greater than the preset upper limit operating parameter, then execute the heat pump heating mode;

[0155] S2355: If the target operating parameter is greater than the preset upper limit operating parameter, then execute the electric heating mode.

[0156] Specifically, after the air conditioning system starts heating the cabin and battery 4 simultaneously, the system will also obtain the proportion of heat that can be allocated to the cabin based on the actual operating parameters of the air conditioning system (such as inlet water temperature, flow rate, condenser 2 inlet air temperature and inlet air volume, etc.), and combine them with the known heat demand of the cabin to finally obtain the target operating parameters of compressor 1, such as the target speed, target exhaust pressure and target intake pressure of compressor 1.

[0157] The purpose is to ensure that the target operating parameters of compressor 1 are within the preset upper limit operating parameters of compressor 1. If the target operating parameters exceed the upper limit operating parameters, the air conditioning system cannot be used to heat battery 4 to prevent exceeding the maximum load of compressor 1 and avoid insufficient heating of compressor 1, which would affect the heating effect of battery 4.

[0158] Preferably, during the execution of the heat pump heating mode, the control of the present invention further includes:

[0159] Obtain the target heating power of the air conditioning system to simultaneously heat the battery and the cabin;

[0160] Obtain the actual heating power of the air conditioning system;

[0161] Compare the target heating power with the actual heating power;

[0162] If the target heating power is greater than the actual heating power, then both heat pump heating mode and electric heating mode will be executed simultaneously.

[0163] If the target heating power is not greater than the actual heating power, only the heat pump heating mode will be executed.

[0164] Specifically, similar to the method of obtaining heating power, the system obtains the target heating power of the cabin based on parameters such as the actual temperature of the cabin, the target temperature of the cabin, the ambient temperature, and the vehicle speed. At the same time, it calculates the target heating power of the battery 4 based on the actual temperature of the battery 4, the target temperature of the battery 4, the ambient temperature, and the battery charge. If the total target heating power of the two exceeds the actual heating power of the system, according to the principle of prioritizing cabin heating, after meeting the heating demand of the cabin, the heating power of the battery 4 will be insufficient. At this time, it is necessary to simultaneously execute the electric heating mode so that the electric heating device can intervene in time to supplement the insufficient heat. On the one hand, the heating demand of the cabin is prioritized, and on the other hand, the heating power of the battery 4 is ensured to be stable so that the battery 4 can heat up quickly.

[0165] Regarding the control logic in the heat pump heating mode process, in a preferred embodiment, if the remaining charge of battery 4 is too low, i.e. below the preset charge, the system will appropriately limit the heat distribution in the cabin and prioritize the distribution of heat to the battery to improve the vehicle's low-temperature range. The preset charge can be flexibly set according to the type and capacity of battery 4, and is preferably set to 15% to 20%.

[0166] Regarding the assessment of battery heating requirements, such as Figures 3 to 6 As shown, the control method of the present invention further includes:

[0167] Obtain the actual temperature of the battery;

[0168] Compare the actual temperature with the preset temperature;

[0169] If the actual temperature is lower than the preset temperature, it is determined that the battery needs to be heated.

[0170] In this application, the preset temperature is preferably set to 20°C.

[0171] This setup provides a trigger condition for automatic battery heating, enabling the system to automatically intervene to heat battery 4 when the temperature is too low, and automatically stop heating once battery 4 reaches the ideal operating temperature. No manual intervention is required throughout the process, which improves the vehicle's intelligence and ensures stable battery performance.

[0172] Furthermore, the vehicle provided by the present invention, based on the above control method, possesses the technical effects of the above control method. Compared with the vehicle before the improvement, the vehicle of the present invention can achieve rapid battery heating in low-temperature environments, enabling the battery to quickly enter the ideal working state, thereby improving the vehicle's power and range, while maximizing energy savings.

[0173] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for controlling a vehicle, characterized in that, The vehicle includes an air conditioning system, a battery (4) and an electric heating device, both of which are capable of heating the battery (4); The control method includes: When it is necessary to heat the battery (4), obtain the operating status of the air conditioning system; Depending on the operating status of the air conditioning system, either heat pump heating mode or electric heating mode may be selectively executed. In the heat pump heating mode, the air conditioning system is controlled to heat the battery (4); In the electric heating mode, the electric heating device is controlled to heat the battery (4).

2. The control method according to claim 1, characterized in that, The step of "selectively executing heat pump heating mode or electric heating mode according to the operating status of the air conditioning system" specifically includes: If the air conditioning system is in a stopped state, then the heat pump heating mode is executed; and / or If the air conditioning system is in the on state, then the electric heating mode is executed.

3. The control method according to claim 1, characterized in that, The step of "selectively executing heat pump heating mode or electric heating mode according to the operating status of the air conditioning system" specifically includes: If the air conditioning system is in a stopped state, then the heat pump heating mode is executed; and / or If the air conditioning system is in the on state, then the operating mode of the air conditioning system is further obtained, which includes cooling mode and heating mode. Depending on the operating mode, the heat pump heating mode or the electric heating mode may be selectively executed.

4. The control method according to claim 3, characterized in that, The step of "selectively executing the heat pump heating mode or the electric heating mode according to the operating mode" specifically includes: If the operating mode is cooling mode, then the electric heating mode is executed; and / or If the operating mode is heating mode, then the heat pump heating mode is executed.

5. The control method according to claim 3, characterized in that, The step of "selectively executing the heat pump heating mode or the electric heating mode according to the operating mode" specifically includes: If the operating mode is cooling mode, then the electric heating mode is executed; and / or If the operating mode is heating mode, then the energy consumption of the air conditioning system to heat the battery (4) and the vehicle cabin at the same time is further obtained and recorded as the first energy consumption. The sum of the energy consumption of the electric heating device heating the battery (4) alone and the energy consumption of the air conditioning system heating the cabin alone is recorded as the second energy consumption; Compare the first energy consumption with the second energy consumption; Based on the comparison results, the heat pump heating mode or the electric heating mode may be selectively executed.

6. The control method according to claim 5, characterized in that, The step of "selectively executing the heat pump heating mode or the electric heating mode based on the comparison results" specifically includes: If the first energy consumption is higher than the second energy consumption, then the electric heating mode is executed; and / or If the first energy consumption is not higher than the second energy consumption, then the heat pump heating mode is executed.

7. The control method according to claim 5, characterized in that, The step of "selectively executing the heat pump heating mode or the electric heating mode based on the comparison results" specifically includes: If the first energy consumption is higher than the second energy consumption, then the electric heating mode is executed; and / or If the first energy consumption is not higher than the second energy consumption, then the target operating parameters of the compressor (1) of the air conditioning system are further obtained if the air conditioning system heats the battery (4) and the cabin at the same time. The target operating parameters are compared with the preset upper limit operating parameters; If the target operating parameter is not greater than the preset upper limit operating parameter, then the heat pump heating mode is executed; and / or If the target operating parameter is greater than the preset upper limit operating parameter, then the electric heating mode is executed.

8. The control method according to any one of claims 1 to 7, characterized in that, During the execution of the heat pump heating mode, the control method of the present invention further includes: Obtain the target heating power of the air conditioning system to simultaneously heat the battery (4) and the cabin; Obtain the actual heating power of the air conditioning system; Compare the target heating power with the actual heating power; If the target heating power is greater than the actual heating power, then both the heat pump heating mode and the electric heating mode are executed simultaneously; and / or If the target heating power is not greater than the actual heating power, then only the heat pump heating mode is executed.

9. The control method according to any one of claims 1 to 7, characterized in that, The control method of the present invention further includes: Obtain the actual temperature of the battery (4); Compare the actual temperature with the preset temperature; If the actual temperature is lower than the preset temperature, it is determined that the battery (4) needs to be heated.

10. A vehicle, characterized in that, The vehicle includes a controller configured to perform the control method according to any one of claims 1 to 9.

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