Heat source selection control method and system based on vehicle diversified working conditions

Abstract

The present invention discloses a heat source selection control method and system based on vehicle diversified working conditions, and the method includes the following steps: step S1, obtaining the real-time heating working condition of the vehicle; step S2, controlling the execution of different heat source selection and control strategies for heating according to the real-time heating working condition of the vehicle. The heat source selection control method based on vehicle diversified working conditions provided by the present application controls the execution of different heat source selection and control strategies for heating based on different real-time heating working conditions of the vehicle, thereby reducing the vehicle heating energy consumption while taking into account customer satisfaction, effectively improving the vehicle's performance and user experience, and improving the vehicle's intelligent performance.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle heating intelligent control, and in particular to a heat source selection control method and system based on diversified vehicle operating conditions. Background Art

[0002] With the continuous development of science and technology, car owners' requirements for car performance are constantly increasing, and at the same time, the number of intelligent functional areas of cars is increasing. When electric vehicles are driving in a relatively low temperature environment (such as winter), one or both of the passenger compartment / battery pack will have a heating demand, and the heating source of the passenger compartment / battery pack may come from a heat pump (HP) or a PTC heater. For electric vehicles, the action of the motor will generate huge heat during the driving process of the car, so the heating source of the passenger compartment / battery pack may also come from the heat of the motor. For electric vehicles, although the motor can generate heat, it is necessary to decide whether to use the motor heat to heat the passenger compartment / battery pack based on the outlet temperature of the motor. Therefore, when heating the passenger compartment / battery pack, the role of the heat pump (HP) and the PTC heater cannot be ignored. Therefore, when heating the passenger compartment / battery pack, it involves which heater to use to heat the passenger compartment / battery pack. In the prior art, there have been many descriptions of using the heat generated by a motor to heat the passenger compartment / battery pack, but there are few analytical cases on whether the heat source for heating the passenger compartment / battery pack is from a heat pump (HP), a PTC heater, or the heat from the motor. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned background technology and to provide a heat source selection control method and system based on the diversified working conditions of a vehicle.

[0004] In a first aspect, the present application provides a heat source selection control method based on a vehicle's diversified operating conditions, comprising the following steps:

[0005] Step S1, obtaining the real-time heating condition of the vehicle;

[0006] Step S2: According to the real-time heating condition of the vehicle, different heat source selection and control strategies are controlled to perform heating.

[0007] According to the first aspect, in a first possible implementation manner of the first aspect, step S1 specifically includes the following steps:

[0008] Step S11, obtaining the charging status and driving status of the vehicle;

[0009] Step S12: obtaining heating requirements of the passenger compartment and the battery pack;

[0010] Step S13: Obtain the real-time heating condition of the vehicle according to the vehicle charging state, driving state, and heating requirements of the passenger compartment and the battery pack.

[0011] According to the second possible implementation of the first aspect, in a third possible implementation of the first aspect, in step S13, the vehicle heating condition includes a charging hybrid heating condition, a passenger compartment single heating condition, a driving hybrid heating condition, and a driving battery pack single heating condition.

[0012] According to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, step S2 specifically includes the following steps:

[0013] Step SA21: when the vehicle heating condition is the charging hybrid heating condition, obtain the minimum value of the heater core target temperature and the battery pack target water temperature and compare it with the minimum water heating temperature of the heat pump at the current temperature;

[0014] Step SA221: When the minimum value of the target temperature of the heater core or the minimum value of the target water temperature of the battery pack is lower than the minimum water temperature of the heat pump at the current temperature, only the PTC is turned on for heating;

[0015] Step SA222: When the minimum value of the heater core target temperature and the minimum value of the battery pack target water temperature are not less than the minimum water heating temperature of the heat pump at the current temperature, control to turn on HP and PTC at the same time for heating.

[0016] According to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, step S2 specifically further includes the following steps:

[0017] Step SB21, when the vehicle heating condition is the passenger compartment single heating condition, obtain the comparison condition of the heater core target temperature and the minimum water heating temperature of the heat pump at the current temperature;

[0018] Step SB221, when the target temperature of the heater core is lower than the minimum water temperature of the heat pump under the current temperature, the control turns on only the PTC for heating;

[0019] Step SB222: When the target temperature of the heater core is not less than the minimum water temperature of the heat pump at the current temperature, the vehicle is controlled to enter the heat pump on heating state for heating, wherein the heat pump on heating state includes turning on the HP for heating only and turning on the HP and PTC for heating at the same time.

[0020] According to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, step S2 further includes the following steps:

[0021] Step SC21: when the vehicle heating condition is the driving mixed heating condition, obtain a comparison condition of the minimum value of the heater core target temperature and the battery pack target temperature and the minimum water heating temperature of the heat pump at the current temperature;

[0022] Step SC221: When the minimum value of the heater core target temperature and the battery pack target temperature is less than the minimum water heating temperature of the heat pump at the current temperature, control only turning on the PTC for heating;

[0023] Step SC222: When the minimum value of the heater core target temperature and the battery pack target temperature is not less than the minimum water heating temperature of the heat pump at the current temperature, the heat pump is controlled to enter the on state for heating, and the heat pump on state includes turning on only HP and turning on HP and PTC at the same time.

[0024] According to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, step S2 further includes the following steps:

[0025] Step SD21: when the vehicle heating condition is the battery pack heating condition, a comparison condition between the motor outlet temperature and the actual battery pack temperature hysteresis interval is obtained;

[0026] Step SD221: When the battery outlet temperature is greater than the actual temperature hysteresis interval of the battery pack, the battery is heated by the motor heat;

[0027] Step SD222: When the battery outlet temperature is not greater than the actual temperature hysteresis interval of the battery pack, control the PTC to turn on for heating, and block the heat exchange between the motor heat and the battery / PTC.

[0028] According to a sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, after step SA222, step SB222, and step SC222, the following steps are further included:

[0029] Step S23, control different HP and PTC on / off heating strategies according to the on / off state of the heat pump and the comparison between the maximum value of the heater core target temperature and the battery target temperature and the maximum heating water temperature of the heat pump at the current temperature.

[0030] According to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, step S23 specifically includes the following steps:

[0031] Step S231: When the heat pump is turned on, if the minimum value of the target temperature of the heater core and the target water temperature of the battery pack is greater than the maximum water temperature of the heat pump at the current temperature, control to turn on PTC and HP at the same time for heating;

[0032] Step S232: when the heat pump is turned on, if the maximum value of the heater core target temperature and the battery target temperature is not greater than the maximum heating water temperature of the heat pump at the current temperature, control is performed to turn on only the HP for heating.

[0033] In a second aspect, the present application provides a heat source selection control system based on diversified vehicle working conditions, including:

[0034] A vehicle real-time heating working condition acquisition module is used to acquire the vehicle real-time heating working condition;

[0035] The heating strategy control module is in communication with the vehicle real-time heating condition acquisition module and is used to control the execution of different heat source selection and control strategies for heating according to the vehicle real-time heating condition.

[0036] According to the second aspect, in a first possible implementation manner of the second aspect, the heating strategy control module includes:

[0037] A first temperature comparison unit is used to obtain a comparison condition of the minimum value of the heater core target temperature and the battery pack target water temperature with the minimum water heating temperature of the heat pump at the current temperature when the vehicle heating condition is the charging hybrid heating condition;

[0038] A first charging hybrid heating control unit is connected to the first temperature comparison unit for controlling to turn on only the PTC for heating when the minimum target temperature of the heater core or the minimum target water temperature of the battery pack is less than the minimum water temperature of the heat pump at the current temperature;

[0039] The second control unit of charging hybrid heating is communicated with the first temperature comparison unit, and is used to control the simultaneous opening of HP and PTC for heating when the minimum value of the heater core target temperature and the minimum value of the battery pack target water temperature are not less than the minimum water temperature of the heat pump at the current temperature.

[0040] Compared with the prior art, the advantages of the present invention are as follows:

[0041] The heat source selection control method based on the diversified working conditions of the vehicle provided in the present application controls the execution of different heat source selection and control strategies for heating based on different real-time heating conditions of the vehicle, thereby reducing the vehicle heating energy consumption while taking into account customer satisfaction, effectively improving the vehicle's performance and user experience, and improving the vehicle's intelligent performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a method flow chart of a heat source selection control method based on vehicle diversified working conditions according to an embodiment of the present invention;

[0043] Figure 2 is another method flow chart of a heat source selection control method based on vehicle diversified working conditions according to an embodiment of the present invention;

[0044] Figure 3 This is a functional module block diagram of a heat source selection control system based on vehicle diversified working conditions according to an embodiment of the present invention;

[0045] Figure 4 It is another functional module block diagram of the heat source selection control system based on the diversified working conditions of the vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] Reference will now be made in detail to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the embodiments described. On the contrary, it is intended to cover changes, modifications and equivalents included in the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can all be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of the two.

[0047] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] Note: The example to be introduced below is only a specific example, and is not intended to limit the embodiments of the present invention to the following specific steps, values, conditions, data, sequences, etc. Those skilled in the art can apply the concept of the present invention to construct more embodiments not mentioned in this specification by reading this specification.

[0049] Please refer to Figure 1 The present application provides a heat source selection control method based on vehicle diversified working conditions, comprising the following steps:

[0050] Step S1, obtaining the real-time heating condition of the vehicle;

[0051] Step S2: According to the real-time heating condition of the vehicle, different heat source selection and control strategies are controlled to perform heating.

[0052] The heat source selection control method based on the diversified working conditions of the vehicle provided in the present application controls the execution of different heat source selection and control strategies for heating based on different real-time heating conditions of the vehicle, thereby reducing the vehicle heating energy consumption while taking into account customer satisfaction, effectively improving the vehicle's performance and user experience, and improving the vehicle's intelligent performance.

[0053] In one embodiment, please refer to Figure 2 , the step S1 specifically comprises the following steps:

[0054] Step S11, obtaining the charging status and driving status of the vehicle;

[0055] Step S12: obtaining heating requirements of the passenger compartment and the battery pack;

[0056] Step S13: Obtain the real-time heating condition of the vehicle according to the vehicle charging state, driving state, and heating requirements of the passenger compartment and the battery pack.

[0057] In one embodiment, there are three vehicle states, including a charging state, a driving state, and a non-charging OFF state, wherein the charging state is that the vehicle is in a charging state, the driving state is that the vehicle is in a non-charging state, and the vehicle IGN gear is not the OFF gear, and the non-charging OFF gear is that the vehicle is in a non-charging state, and the vehicle IGN gear is the OFF gear.

[0058] The heat source includes a motor, a PTC and a HP, wherein the HP is a heat pump and the PTC (Positive Temperature Coefficient) is a heater.

[0059] In one embodiment, the step S13 specifically includes the following steps:

[0060] Step S131, obtaining the charging status of the vehicle;

[0061] Step S1320: when the vehicle is in a charging state, obtaining heating requirements of the passenger compartment and the battery pack;

[0062] Step S1321: When both the passenger compartment and the battery pack have heating requirements, it is determined that the real-time heating operating condition of the vehicle is a charging hybrid heating operating condition;

[0063] Step S1323: when the passenger compartment has a heating demand and the battery pack has no heating demand, it is determined that the real-time heating operating condition of the vehicle is a charging passenger compartment single heating operating condition;

[0064] Step S1324: when there is no heating demand for the passenger compartment and there is a heating demand for the battery pack, it is determined that the real-time heating operating condition of the vehicle is a heating operating condition of the charging battery pack alone;

[0065] Step S1325: When there is no heating demand for the passenger compartment and the battery pack, it is determined that the real-time heating condition of the vehicle is a state of no heating demand;

[0066] Step S1330: when the vehicle is in a non-charging state, obtaining the vehicle driving condition;

[0067] Step S1331: When the vehicle is in a non-charging state and the vehicle driving condition is a non-driving state, the vehicle is in a non-charging OFF state at this time, and it is determined that the vehicle is in a state without heating demand;

[0068] Step S1340: when the vehicle is in a non-charging state and the vehicle driving condition is a driving state, the heating requirements of the passenger compartment and the battery pack are obtained;

[0069] Step S1341: when the vehicle is in a non-charging state, and the vehicle driving condition is a driving state, and both the passenger compartment and the battery pack have heating requirements, it is determined that the vehicle real-time heating condition is a driving mixed heating condition;

[0070] Step S1342: when the vehicle is in a non-charging state, and the vehicle driving condition is a driving state, and the passenger compartment has a heating demand but the battery pack has no heating demand, it is determined that the vehicle real-time heating condition is a driving passenger compartment single heating condition;

[0071] Step S1343: when the vehicle is in a non-charging state and the vehicle driving condition is a driving state, and the passenger compartment has no heating demand but the battery pack has heating demand, it is determined that the vehicle real-time heating condition is a driving battery pack single heating condition;

[0072] Step S1344: When the vehicle is in a non-charging state and the vehicle's driving condition is a driving state, and there is no heating demand for the passenger compartment and the battery pack, it is determined that the vehicle's real-time heating condition is a no-heating demand condition.

[0073] The above judgment method can be used to determine what kind of real-time heating condition the vehicle is in. Therefore, according to comprehensive statistics, the real-time heating conditions of the vehicle include no heating condition, charging battery pack single heating condition, charging mixed heating condition, charging passenger compartment single heating condition, driving passenger compartment single heating condition, driving battery pack single heating condition, driving mixed heating condition, among which, charging passenger compartment single heating condition and driving passenger compartment single heating condition are collectively referred to as passenger compartment single heating condition. Among them, single heating is defined as the need for heating alone.

[0074] In one embodiment, when the real-time heating condition of the vehicle is heating the charging battery pack alone, since the battery pack does not have a very high heat requirement, turning on the PTC can meet the heating demand of the battery pack. In this condition, the control only turns on the PTC for heating.

[0075] In one embodiment, when the vehicle heating operation condition is a no-heating demand operation condition, both the HP and the PTC are controlled not to operate.

[0076] When the vehicle is in other heating conditions other than the condition of no heating demand and the charging battery pack single heating condition, including the charging mixed heating condition, the passenger compartment single heating condition (including the charging passenger compartment single heating condition and the driving passenger compartment single heating condition), the driving mixed heating condition and the driving battery pack single heating condition, it is necessary to further select the heat source based on the heating demand, battery temperature, heater core target temperature, heater core actual temperature, battery pack target temperature and battery pack actual temperature.

[0077] The present application includes a heat source selection control strategy in the heating mode of a thermal management system with multiple heat sources. In order to fully utilize the heat of the motor for heating, and to avoid the phenomenon that the target temperature is too low or the temperature of the passenger compartment or battery pack is too high due to the increase of the heat pump heating, the present application selects the heat source appropriately. In the present application, the residual heat of the motor only heats the battery pack and has no heating function for the passenger compartment. However, it can be changed according to the thermal management system, but it is still within the protection scope of the present application. The information such as the target temperature of the heater core / battery pack and the actual temperature of the battery pack is read in real time. Based on the judgment of the current driving state and heating demand of the electric vehicle, and combined with the heating characteristics of the heat pump (HP), the heat source selection control strategy in the heating mode of the thermal management system including multiple heat sources is completed, so that the vehicle can reasonably select the heating heat source components in different working conditions and when there are different heating demands, and then control the opening / closing of the heating heat source components, so that the temperature of the passenger compartment / battery pack can reach the passenger compartment / battery heating demand target as soon as possible.

[0078] In one embodiment, the step S2 specifically includes the following steps:

[0079] Step SA21: When the vehicle heating condition is the charging hybrid heating condition, the motor does not operate, and the heat source can only come from PTC or HP, the minimum value of the heater core target temperature and the minimum value of the battery pack target water temperature are obtained and compared with the minimum water heating temperature of the heat pump at the current temperature;

[0080] Step SA221: When the minimum value of the target temperature of the heater core or the minimum value of the target water temperature of the battery pack is lower than the lowest water temperature of the heat pump at the current temperature, the control only turns on the PTC for heating, and the heat pump cannot be used for heating. Otherwise, the heating capacity is too strong, and it is easy to heat the passenger compartment or the battery pack temperature beyond the corresponding target temperature, resulting in the target temperature being too high.

[0081] Step SA222: When the minimum value of the heater core target temperature and the minimum value of the battery pack target water temperature are not less than the minimum water heating temperature of the heat pump at the current temperature, control to turn on HP and PTC at the same time for heating.

[0082] In one embodiment, the step S2 further includes the following steps:

[0083] Step SB21, when the vehicle heating condition is the passenger compartment single heating condition, obtain the comparison condition of the heater core target temperature and the minimum water heating temperature of the heat pump at the current temperature;

[0084] Step SB221, when the target temperature of the heater core is lower than the lowest water temperature of the heat pump at the current temperature, the use of the heat pump for heating at this time is likely to heat the passenger compartment or the battery pack to a temperature exceeding the target temperature, so the heat pump cannot be turned on, and the control enters the heat pump off state, and the control only turns on the PTC for heating;

[0085] Step SB222: When the target temperature of the heater core is not less than the minimum water temperature of the heat pump at the current temperature, the vehicle is controlled to enter the heat pump on heating state for heating, wherein the heat pump on heating state includes turning on the HP for heating only and turning on the HP and PTC for heating at the same time.

[0086] In one embodiment, under the passenger compartment heat-only condition, the motor is in operation while driving. Since the heating demand of the passenger compartment requires a quick heating response, and the motor waste heat is slow to heat, the motor waste heat is generally only used for heating under the battery pack heat-only condition. However, if the motor heat is sufficient when the motor outlet temperature is greater than the target temperature of the heater core and greater than the target temperature of the battery pack, and the system satisfies the requirement to use the motor waste heat to heat the passenger compartment or battery pack, the motor waste heat can also be used to heat the passenger compartment or battery pack, and this strategy is within the protection scope of this application.

[0087] In one embodiment, the step S2 further includes the following steps:

[0088] Step SC21: when the vehicle heating condition is the driving mixed heating condition, obtain a comparison condition of the minimum value of the heater core target temperature and the battery pack target temperature and the minimum water heating temperature of the heat pump at the current temperature;

[0089] Step SC221: When the minimum value of the heater core target temperature and the battery pack target temperature is less than the minimum water temperature of the heat pump at the current temperature, the use of the heat pump for heating at this time is likely to heat the passenger compartment or the battery pack temperature beyond the corresponding target temperature. Therefore, the heat pump cannot be turned on, and the heat pump enters the heat pump off state, and the control only turns on the PTC for heating;

[0090] Step SC222: When the minimum value of the heater core target temperature and the battery pack target temperature is not less than the minimum water heating temperature of the heat pump at the current temperature, the heat pump is controlled to enter the on state for heating, and the heat pump on state includes turning on only HP and turning on HP and PTC at the same time.

[0091] In one embodiment, when the vehicle heating condition is a driving mixed heating condition, the motor is running and the passenger compartment needs to be heated, so the heating reaction needs to be rapid, while the motor waste heat is slow to heat. Therefore, in this patent strategy, the motor waste heat is only used to heat the battery pack when it is heated alone. However, if the motor heat is sufficient when the motor outlet temperature is greater than the target temperature of the heater core and greater than the target temperature of the battery pack, and the system satisfies the requirement to use the motor waste heat to heat the passenger compartment / battery pack, the motor waste heat can also be used to heat the passenger compartment or battery pack, and this strategy is still within the scope of protection of this application.

[0092] In one embodiment, the step S2 further includes the following steps:

[0093] Step SD21: when the vehicle heating condition is the battery pack heating condition, a comparison condition between the motor outlet temperature and the actual battery pack temperature hysteresis interval is obtained;

[0094] Step SD221: When the battery outlet temperature is greater than the actual temperature hysteresis interval of the battery pack, the battery is heated by the motor to reduce energy consumption;

[0095] Step SD222: When the battery outlet temperature is not greater than the actual temperature hysteresis range of the battery pack, the PTC is controlled to be turned on for heating. To prevent the PTC from heating the motor, the heat exchange between the motor heat and the battery and between the motor heat and the PTC must be blocked.

[0096] The actual temperature hysteresis interval of the battery pack is defined as the actual temperature of the battery pack and the preset hysteresis interval value P T6 (10) and.

[0097] In one embodiment, after the step SA222, the step SB222 and the step SC222, the following steps are further included:

[0098] Step S23, control different HP and PTC on / off heating strategies according to the on / off state of the heat pump and the comparison between the maximum value of the heater core target temperature and the battery target temperature and the maximum heating water temperature of the heat pump at the current temperature.

[0099] In a more specific embodiment, after step SA222, the following steps are further included:

[0100] Since the temperature jump is large, it is necessary to increase the hysteresis interval when judging the temperature later to avoid the HP or PTC from cycling on and off quickly.

[0101] When only PTC is turned on, the minimum value of the heater core target temperature and the battery pack target water temperature and the minimum water temperature of the heat pump at the current temperature and P are obtained in real time. T1 (hysteresis interval, can be set to 5 degrees) and the comparison condition, if the minimum value of the heater core target temperature and the battery pack target water temperature is greater than the minimum water temperature of the heat pump at the current temperature and P T1 When the sum of , the control turns on HP and PTC at the same time.

[0102] When HP and PTC are turned on at the same time, the minimum value of the heater core target temperature and the battery pack target water temperature is obtained in real time for comparison with the minimum water heating temperature of the heat pump at the current temperature. If it is less than, HP is controlled to be turned off and only PTC is turned on.

[0103] In a more specific embodiment, after step SB222, the following steps are also included:

[0104] Since the temperature jump is large, it is necessary to increase the hysteresis interval when judging the temperature later to avoid the HP / PTC from cycling on and off quickly.

[0105] When the heat pump is off, obtain the target temperature of the heater core and the minimum heating temperature of the heat pump at the current temperature in real time. T2 (5) The comparison working condition of the sum of is greater than, it is to quickly develop the passenger compartment demand and enter the heat pump on state; when in the heat pump on state, it is judged in real time whether the target temperature of the heater core is less than the minimum water heating temperature of the heat pump under the current temperature. If it is less than, the heat pump is turned off and only the PTC is turned on.

[0106] The following is the heat source on / off control strategy when the heat pump is on.

[0107] When the heat pump is just turned on, determine whether the target temperature of the heater core is greater than the current temperature (the maximum heating water temperature that the heat pump can reach when the passenger compartment is heated alone). If so, the control only turns on the HP, which can no longer meet the heating needs of the passenger compartment. Then the PTC and HP are turned on at the same time; if not, the control only turns on the HP.

[0108] Due to the large temperature jump, when judging the temperature after the heat pump is turned on, it is necessary to increase the hysteresis interval to avoid rapid cycling of the HP / PTC on and off.

[0109] When only HP is working in the heat pump on state, it is judged in real time whether the target temperature of the heater core is greater than the current temperature of the passenger compartment. The heat pump can reach the highest water heating temperature when the passenger compartment is heated alone. If it is greater, HP and PTC are turned on at the same time.

[0110] When the heat pump is turned on, the HP and PTC work at the same time. The target temperature and current temperature of the heating core are obtained in real time. When the passenger compartment is heated, the heat pump can reach the highest heating water temperature P. T3 (5) is compared with the working condition. If it is less than, the PTC is turned off and only the HP is turned on.

[0111] In a more specific embodiment, after step SC222, the following steps are further included:

[0112] Since the temperature jump is large, it is necessary to increase the hysteresis interval when judging the temperature later to avoid the HP / PTC from cycling on and off quickly.

[0113] When the heat pump is off, the minimum value of the heater core target temperature and the battery target temperature and the minimum heating temperature of the heat pump at the current temperature P are obtained in real time. T4 (5) The sum of the comparison conditions, if greater than, enter the heat pump start state;

[0114] When the heat pump is in the on state, the minimum value of the heater core target temperature and the battery pack target temperature is obtained in real time for comparison with the minimum hot water temperature of the heat pump at the current temperature. If it is less than, the heat pump enters the off state and only turns on the PTC.

[0115] The following is the heat source on / off control strategy when the heat pump is on.

[0116] When the heat pump is just turned on, the maximum values ​​of the heater core target temperature and the battery target temperature are obtained in real time for comparison with the maximum hot water temperature that the heat pump can achieve at the current temperature. If they are greater than these values, then turning on the HP alone will not be able to meet the heating needs of the passenger compartment, and the PTC and HP will be controlled to be turned on at the same time. If they are not greater than these values, then only the HP will be controlled to be turned on.

[0117] Due to the large temperature jump, when judging the temperature after the heat pump is turned on, it is necessary to increase the hysteresis interval to avoid rapid cycling of the HP / PTC on and off.

[0118] When only HP is working in the heat pump on state, the maximum value of the heater core target temperature and the battery target temperature is obtained in real time to compare with the highest hot water temperature that the heat pump can reach at the current temperature. If it is greater, HP and PTC are controlled to be turned on at the same time.

[0119] When the HP and PTC in the heat pump on state work at the same time, the maximum value of the heater core target temperature and the battery target temperature and the maximum water heating temperature P that the heat pump can reach at the current temperature are obtained in real time. T5 The difference of (5) is compared with the working condition. If it is less than , the PTC is turned off and only the HP is turned on.

[0120] In a more specific embodiment, after step SD222, the following steps are also included:

[0121] Since the temperature jump is large, it is necessary to increase the hysteresis interval when judging the temperature later to avoid the HP / PTC from cycling on and off quickly.

[0122] When both PTC and HP are not working, the motor heat is used to heat the battery. The motor outlet temperature, the actual battery pack temperature and P T7 (5) If the sum is less than , the control only turns on the PTC, and in order to avoid PTC heating the motor, the control interrupts the heat exchange between the motor heat and the battery / PTC.

[0123] When only PTC is turned on, and to prevent PTC from heating the motor, interrupting the heat exchange between the motor and the battery and between the motor and PTC, the motor outlet temperature, the actual battery pack temperature and PTC are obtained in real time. T6(10) is compared with the working condition. If it is greater than, the PTC and HP are controlled not to work, and the heat from the motor is used to heat the battery, resulting in lower energy consumption.

[0124] As mentioned above, P T1 , P T2 (5) P T3 (5) P T4 (5) P T5 (5) P T6 (10) P T7 (5) etc., for setting different or same hysteresis interval values ​​or calibration values, it is necessary to combine the actual situation of the vehicle and calibrate the vehicle. The purpose of the invention can also be achieved when these conditions change.

[0125] The present application provides a heat source selection control method based on the diversified working conditions of the vehicle. In order to fully utilize the heat of the motor for heating and avoid the phenomenon that the target temperature is too low and the heat pump is used for heating, resulting in the passenger compartment or battery pack temperature being too high or the heating is not in place, the present invention appropriately selects and controls the heat source according to the target temperature of the heater core and the heating capacity of the heat pump. In the present application, the motor waste heat only heats the battery pack and has no heating function for the passenger compartment. However, it can be changed according to the thermal management system and is still within the protection scope of the present invention. The information such as the target temperature of the heater core / battery pack and the actual temperature of the battery pack is read in real time. Based on the judgment of the current driving state and heating demand of the electric vehicle and combined with the heating characteristics of the heat pump, the heat source selection control strategy in the heating mode of the thermal management system containing multiple heat sources is completed, so that the vehicle can reasonably select the heating heat source components in different working conditions and when there are different heating demands, and then control the opening and closing of the heating heat source components, so that the temperature of the passenger compartment and the battery pack can reach the passenger compartment / battery heating demand target as soon as possible. By applying the control strategy of the present invention, car manufacturers do not need to increase any costs. According to the vehicle operating conditions, target temperature, and reading of temperature signals, they can select a suitable heat source from a variety of heating sources, so that the temperature of the passenger compartment / battery pack can reach the passenger compartment / battery heating demand target as soon as possible, thereby increasing the vehicle's performance and user experience, and improving the vehicle's intelligent performance.

[0126] Based on the same invention concept, please refer to Figure 3 The present application provides a heat source selection control system based on the diversified working conditions of a vehicle, including:

[0127] The vehicle real-time heating working condition acquisition module 100 is used to acquire the vehicle real-time heating working condition;

[0128] The heating strategy control module 200 is in communication with the vehicle real-time heating condition acquisition module 100, and is used to control the execution of different heat source selection and control strategies for heating according to the vehicle real-time heating condition.

[0129] In one embodiment, the heating strategy control module 200 includes:

[0130] The first temperature comparison unit 210 is used to obtain the minimum value of the heater core target temperature and the battery pack target water temperature and compare it with the minimum water heating temperature of the heat pump at the current temperature when the vehicle heating condition is the charging hybrid heating condition;

[0131] The charging hybrid heating first control unit 221 is connected to the first temperature comparison unit 210 for controlling to turn on only the PTC for heating when the minimum target temperature of the heater core or the minimum target water temperature of the battery pack is lower than the minimum water temperature of the heat pump at the current temperature;

[0132] The second control unit 222 for charging hybrid heating is communicated with the first temperature comparison unit 210, and is used to control the simultaneous opening of HP and PTC for heating when the minimum value of the target temperature of the heater core and the minimum value of the target water temperature of the battery pack are not less than the minimum heating water temperature of the heat pump at the current temperature.

[0133] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0134] The present invention implements all or part of the process in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0135] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0136] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of a computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0137] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0138] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, servers or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0139] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), servers, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0140] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0141] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0142] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A heat source selection control method based on diversified vehicle working conditions, characterized in that: The following steps are involved: Step S1, obtaining the real-time heating condition of the vehicle; Step S2, controlling and executing different heat source selection and control strategies for heating according to the real-time heating condition of the vehicle; The step S1 specifically comprises the following steps: Step S11, obtaining the charging status and driving status of the vehicle; Step S12: obtaining heating requirements of the passenger compartment and the battery pack; Step S13, obtaining the real-time heating condition of the vehicle according to the charging state, driving state, heating requirements of the passenger compartment and the battery pack of the vehicle; In the step S13, the vehicle real-time heating condition includes a charging hybrid heating condition, a passenger compartment single heating condition, a driving hybrid heating condition, and a driving battery pack single heating condition; The step S2 specifically comprises the following steps: Step SA21: when the vehicle heating condition is the charging hybrid heating condition, obtain the minimum value of the heater core target temperature and the battery pack target water temperature and compare it with the minimum water heating temperature of the heat pump at the current temperature; Step SA221: When the minimum value of the target temperature of the heater core or the minimum value of the target water temperature of the battery pack is lower than the minimum water temperature of the heat pump at the current temperature, only the PTC is turned on for heating; Step SA222: When the minimum value of the heater core target temperature and the minimum value of the battery pack target water temperature are not less than the minimum water heating temperature of the heat pump at the current temperature, control to turn on HP and PTC at the same time for heating.

2. The heat source selection control method based on vehicle diversified working conditions according to claim 1, characterized in that: The step S2 specifically further comprises the following steps: Step SB21, when the vehicle heating condition is the passenger compartment single heating condition, obtain the comparison condition of the heater core target temperature and the minimum water heating temperature of the heat pump at the current temperature; Step SB221, when the target temperature of the heater core is lower than the minimum water temperature of the heat pump under the current temperature, the control turns on only the PTC for heating; Step SB222: When the target temperature of the heater core is not less than the minimum water temperature of the heat pump at the current temperature, the vehicle is controlled to enter the heat pump on heating state for heating, wherein the heat pump on heating state includes turning on the HP for heating only and turning on the HP and PTC for heating at the same time.

3. The heat source selection control method based on vehicle diversified working conditions according to claim 2, characterized in that: The step S2 further comprises the following steps: Step SC21: when the vehicle heating condition is the driving mixed heating condition, obtain a comparison condition of the minimum value of the heater core target temperature and the battery pack target temperature and the minimum water heating temperature of the heat pump at the current temperature; Step SC221: When the minimum value of the heater core target temperature and the battery pack target temperature is less than the minimum water heating temperature of the heat pump at the current temperature, control only turning on the PTC for heating; Step SC222: When the minimum value of the heater core target temperature and the battery pack target temperature is not less than the minimum water heating temperature of the heat pump at the current temperature, the heat pump is controlled to enter the on state for heating, and the heat pump on state includes turning on only HP and turning on HP and PTC at the same time.

4. The heat source selection control method based on vehicle diversified working conditions according to claim 3 is characterized in that: The step S2 further comprises the following steps: Step SD21: when the vehicle heating condition is the battery pack heating condition, a comparison condition between the motor outlet temperature and the actual battery pack temperature hysteresis interval is obtained; Step SD221: When the motor outlet temperature is greater than the actual temperature hysteresis interval of the battery pack, the battery is heated by the motor heat; Step SD222: When the motor outlet temperature is not greater than the actual temperature hysteresis interval of the battery pack, control the PTC to turn on for heating and block the heat exchange between the motor heat and the battery / PTC.

5. The heat source selection control method based on vehicle diversified working conditions according to claim 3, characterized in that: After the step SA222, the step SB222 and the step SC222, the following steps are also included: Step S23, control different HP and PTC on / off heating strategies according to the on / off state of the heat pump and the comparison between the maximum value of the heater core target temperature and the battery target temperature and the maximum heating water temperature of the heat pump at the current temperature.

6. A heat source selection control system based on vehicle diversified working conditions, implementing the steps of a heat source selection control method based on vehicle diversified working conditions as claimed in claim 1, characterized in that: include: A vehicle real-time heating working condition acquisition module is used to acquire the vehicle real-time heating working condition; The heating strategy control module is in communication with the vehicle real-time heating condition acquisition module and is used to control the execution of different heat source selection and control strategies for heating according to the vehicle real-time heating condition.

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