A Temperature Control Method, Device, Equipment and Storage Medium for an Extended-Range Generator

Abstract

The embodiments of the present application disclose a temperature control method, device, equipment and storage medium for an extended-range generator. In this method, when it is detected that the extended-range generator of the vehicle starts, the current engine oil temperature of the extended-range generator and the coolant temperature of the vehicle are obtained. When the current engine oil temperature is greater than the rated engine oil temperature, the coolant flow rate required for temperature control of the extended-range generator is determined according to the current engine oil temperature and the coolant temperature. Then, the current motor operating condition information of the extended-range generator and the vehicle environment information where the vehicle is currently located are obtained. Furthermore, the coolant flow rate is corrected according to the motor operating condition information and the vehicle environment information to obtain the corrected coolant flow rate. Finally, the extended-range generator is temperature-controlled according to the corrected coolant flow rate, which can accurately control the coolant flow rate of the extended-range generator, thereby improving the temperature control effect of the extended-range hybrid vehicle.

Description

Technical Field

[0001] The present application relates to the fields of automotive control technology and computer technology, and particularly to a temperature control method, device, equipment and storage medium for an extended-range generator. Background Art

[0002] In an extended-range hybrid vehicle, the power system usually includes an extended-range generator, a power battery, a drive motor and an engine. In order to ensure the driving performance of the vehicle, it is necessary to adjust the working temperature of each power module by controlling the circulation of the coolant in the power system. Among them, the coolant used for temperature control of the extended-range generator generally comes from the drive motor or the power battery, and the coolant flow rate used for temperature control of the extended-range generator will affect the temperature control effect of the vehicle's power system and the driving performance of the vehicle. In view of this, how to accurately control the coolant flow rate used for the extended-range generator has become an important research topic in the current field of automotive control. Summary of the Invention

[0003] Embodiments of the present application provide a temperature control method, device, equipment and storage medium for an extended-range generator, which can accurately control the coolant flow rate of the extended-range generator and improve the temperature control effect of the extended-range hybrid vehicle.

[0004] On the one hand, embodiments of the present application provide a temperature control method for an extended-range generator, including:

[0005] When it is detected that the extended-range generator of the vehicle starts, obtain the current engine oil temperature of the extended-range generator and the coolant temperature of the vehicle;

[0006] When the current engine oil temperature is greater than the rated engine oil temperature, determine the coolant flow rate required for temperature control of the extended-range generator according to the current engine oil temperature and the coolant temperature;

[0007] Obtain the current motor operating condition information of the extended-range generator and the current vehicle environment information of the vehicle, and correct the coolant flow rate according to the motor operating condition information and the vehicle environment information to obtain a corrected coolant flow rate;

[0008] Perform temperature control on the extended-range generator according to the corrected coolant flow rate.

[0009] On the other hand, embodiments of the present application provide a temperature control device for an extended-range generator, including:

[0010] An acquisition unit, configured to obtain the current engine oil temperature of the extended-range generator and the coolant temperature of the vehicle when it is detected that the extended-range generator of the vehicle starts;

[0011] A flow rate determination unit, configured to determine the coolant flow rate required for temperature control of the range extender generator according to the current engine oil temperature and the coolant temperature when the current engine oil temperature is greater than the rated engine oil temperature;

[0012] A flow rate correction unit, configured to obtain the current motor operating condition information of the range extender generator and the current vehicle environment information of the vehicle, and correct the coolant flow rate according to the motor operating condition information and the vehicle environment information to obtain a corrected coolant flow rate;

[0013] A temperature control unit, configured to perform temperature control on the range extender generator according to the corrected coolant flow rate.

[0014] In another aspect, an embodiment of the present application further provides a control device, including:

[0015] A processor, adapted to implement one or more instructions;

[0016] A storage medium, storing one or more instructions, the one or more instructions being adapted to be loaded and executed by the processor to perform the temperature control method of the range extender generator provided in the first aspect.

[0017] In another aspect, an embodiment of the present application further provides a storage medium, storing one or more instructions, the one or more instructions being adapted to be loaded and executed by a processor to perform the temperature control method of the range extender generator provided in the first aspect.

[0018] In the embodiment of the present application, the coolant flow rate used for temperature control of the range extender generator is jointly determined in combination with the motor operating condition information and the environment information. By referring to the motor operating condition information, the current coolant flow rate can be made to meet the actual working requirements of the motor, thereby reducing the negative impact on the motor working efficiency caused by the coolant flow. By referring to the environment information, the heat dissipation capacity existing in the environment dimension can be utilized when performing temperature control on the range extender generator, which is beneficial to determining a more accurate coolant flow rate from the vehicle dimension. That is to say, by adopting the embodiment of the present application to perform temperature control on the range extender generator, the coolant flow rate that meets the motor working requirements can be accurately determined, thereby improving the temperature control effect and the motor working efficiency of the range extender hybrid vehicle. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the composition of a drive system of a range-extended hybrid vehicle provided by an embodiment of the present application;

[0021] Figure 2 It is a schematic flowchart of a temperature control method for a range extender generator provided by an embodiment of the present application;

[0022] Figure 3 It is a schematic diagram of a coolant flow calculation method provided by an embodiment of the present application;

[0023] Figure 4 It is a schematic structural diagram of a temperature control device for a range extender generator provided by an embodiment of the present application;

[0024] Figure 5 It is a schematic structural diagram of a control device provided by an embodiment of the present application;

[0025] Figure 6 It is a schematic structural diagram of a vehicle controller proposed by an embodiment of the present application. Detailed implementation manners

[0026] It should be noted in advance that, in order to enable those skilled in the art to better understand the technical solutions proposed by the embodiments of the present application, the embodiments of the present application will, in conjunction with one or more attached drawings, clearly and completely describe the implementation manners of the technical solutions proposed by the embodiments of the present application. And, each attached drawing shown in the embodiments of the present application is only for exemplary illustration. For example, the execution order of each step in the attached drawing can be adaptively adjusted according to the actual application scenario. In addition, in the embodiments of the present application, the block diagrams, modules, and units shown in each attached drawing are only functional entities, and do not necessarily correspond to physically independent entities. And each module or unit can be a part of an overall module or unit including the functions of that module or unit. That is to say, the terms "module" or "unit" mentioned in the embodiments of the present application refer to a computer program with a predetermined function or a part of a computer program, which can work with other related parts to achieve a predetermined goal, and can also be fully or partially implemented by using software, hardware (such as a processing circuit or a memory), or a combination thereof, or implemented in different networks and / or processor devices and / or microcontroller devices. Similarly, one processor (or multiple processors or memories) can be used to implement one or more modules or units.

[0027] In real life, under the same motor operating conditions of a range extender generator, the change in engine oil temperature not only affects its own power generation efficiency but also affects the engine oil viscosity, thereby causing the power of the mechanical oil pump to change accordingly. Therefore, in order to avoid reducing the working efficiency of the entire vehicle during the temperature control process of the range extender generator as much as possible, the embodiment of the present application proposes a technical solution for temperature control of the range extender generator in a range-extended hybrid vehicle. This solution can accurately determine the coolant flow rate used for temperature control of the range extender generator, thereby achieving precise temperature control of the range extender generator.

[0028] Specifically, the main principle of this solution is as follows: When the range extender generator starts, based on the current engine oil temperature of the range extender generator and the coolant temperature of the vehicle, determine the coolant flow rate required for temperature control of the range extender generator, and further correct the coolant flow rate in combination with the current motor operating condition information of the range extender generator and the vehicle environment information where the vehicle is currently located, so as to obtain a coolant flow rate that highly matches the current motor working requirements, and then control the temperature of the range extender generator according to the corrected coolant flow rate.

[0029] Since the coolant flow rate used for temperature control of the range extender generator is jointly determined in combination with the motor operating condition information and the environment information. By referring to the motor operating condition information, the current coolant flow rate can be made to meet the actual working requirements of the motor, thereby reducing the negative impact on the motor working efficiency caused by the coolant flow. By referring to the environment information, the heat dissipation capacity existing in the environmental dimension can be utilized when controlling the temperature of the range extender generator, which is beneficial to determining a more accurate coolant flow rate from the vehicle dimension. That is to say, by using the technical solution provided by the embodiment of the present application to control the temperature of the range extender generator, the coolant flow rate that meets the motor working requirements can be accurately determined, which is beneficial to improving the temperature control effect of the range-extended hybrid vehicle and the motor working efficiency.

[0030] In one implementation, the above technical solution can be applied to the internal control device (such as the controller of the drive system in the vehicle, the vehicle-mounted terminal, etc.) or the control system of a range-extended hybrid vehicle (hereinafter referred to as the vehicle). Among them, the structure of the drive system can be exemplarily referred to Figure 1 . Such as Figure 1 As shown, the drive system can at least include modules such as an engine, a range extender generator, a power battery, and a drive motor. Among them, the engine can operate by consuming a preset energy source (such as fuel) to drive the range extender generator to rotate and generate electric energy. Further, this electric energy can be transmitted to the power battery module for storage for use by the drive motor, and / or transmitted to the drive motor to drive the motor to operate, thereby providing driving force for the vehicle to drive the vehicle to travel.

[0031] It should be specifically noted that Figure 1 the drive system shown is only an exemplary illustration and does not represent any limitation to the embodiments of the present application. For example, in practical applications, the vehicle drive system may include Figure 1 one or more modules in at least including a range extender generator, or include other one or more modules, and the energy flow direction between each module can also be configured according to actual drive requirements, not necessarily the same as Figure 1 the energy flow direction in (such as Figure 1 shown by the arrows of each connection line in).

[0032] In another implementation manner, the above technical solution can also be applied to an external control device in communication connection with the vehicle. Among them, the communication connection between the external control device and the vehicle is at least used for information acquisition and instruction transmission. Exemplarily, information acquisition mainly refers to the external control device obtaining vehicle information such as motor working conditions, engine oil temperature, and coolant temperature from the vehicle, and instruction transmission mainly refers to the external control device sending a control instruction carrying the corrected coolant flow rate to the vehicle, so that the vehicle controls the temperature of the range extender generator according to the corresponding coolant flow rate.

[0033] Optionally, the external control device may include one or both of a terminal device and a server. The terminal device may specifically be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart TV, a smart wearable device, etc. The server may specifically be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, a cloud server providing cloud computing services, etc., and the embodiments of the present application do not make specific limitations thereto.

[0034] For the convenience of understanding and illustration, the following takes the implementation of integrating the principle of the solution in a control device as an example to elaborate in detail on the related technical implementation manners, where the control device refers to the external control device, the internal control device or the control system mentioned above.

[0035] Based on the main principle of the above technical solution, the embodiments of the present application specifically propose a temperature control method for a range extender generator, and this method is executed by the control device mentioned above. Please refer to Figure 2 , Figure 2 which is a schematic flowchart of the temperature control method for the range extender generator. As Figure 2 shown, this method mainly includes steps S201 - S204:

[0036] S201. When it is detected that the range extender generator of the vehicle starts, obtain the current engine oil temperature of the range extender generator and the coolant temperature of the vehicle.

[0037] In a specific embodiment, the vehicle mainly refers to an extended-range hybrid vehicle, and the power system of the vehicle at least includes an extended-range generator. When controlling the temperature of the extended-range generator, it is necessary to dispatch coolant from other modules of the vehicle (such as a power battery, a drive motor, an engine, etc.) to achieve this. In this case, the coolant temperature of the vehicle can be the temperature of the coolant in a certain module that needs to be called, or the temperature of the coolant in each module when multiple modules with mixable coolant are used. There is no limitation here.

[0038] S202. When the current engine oil temperature is greater than the rated engine oil temperature, determine the coolant flow rate required for temperature control of the extended-range generator according to the current engine oil temperature and the coolant temperature.

[0039] In a specific embodiment, when the current engine oil temperature is greater than the rated engine oil temperature, the control device can obtain a flow rate configuration table to query the coolant flow rate associated with the temperature group composed of the current engine oil temperature and the coolant temperature from the flow rate configuration table, and then use the queried coolant flow rate as the coolant flow rate required for temperature control of the extended-range generator. Among them, the flow rate configuration table can be configured by technicians based on historical experience or experimental data.

[0040] In other embodiments, when the current engine oil temperature is less than the rated engine oil temperature, it indicates that the vehicle is in a cold start state, and it is necessary to appropriately increase the temperature of the engine oil so that the extended-range generator is within the rated operating temperature range, thereby ensuring the power generation efficiency and service life.

[0041] Specifically, when the current engine oil temperature is less than the rated engine oil temperature, the control device can obtain the temperature difference between the current engine oil temperature and the coolant temperature to determine whether the coolant has the heating ability for the engine oil of the extended-range generator according to the temperature difference. When it is determined that the coolant has the heating ability, set the coolant flow rate to the first flow rate, or when it is determined that the coolant does not have the heating ability, set the coolant flow rate to the second flow rate. Among them, the first flow rate is greater than the second flow rate.

[0042] As an example, the first flow rate can be the median value of the maximum coolant flow rate. On the one hand, it can make the engine oil in the extended-range generator heat up under the heating effect of the coolant, and on the other hand, it can avoid the large amount of use of the coolant, thereby reducing the impact on the temperature control effect of other modules that need to use the coolant.

[0043] The second flow rate can be a value approaching 0 or equal to 0. Since the second flow rate is used when the coolant cannot heat up the engine oil, that is, in this case, scheduling the coolant to flow in the range extender generator will not increase the engine oil temperature. Instead, it may affect the coolant flow rate in other modules, thereby resulting in the overall temperature control effect not meeting the expectations. Therefore, setting the second flow rate to a small value can ensure the overall temperature control effect as much as possible.

[0044] S203. Obtain the current motor operating condition information of the range extender generator and the current vehicle environment information of the vehicle, and correct the coolant flow rate according to the motor operating condition information and the vehicle environment information to obtain the corrected coolant flow rate.

[0045] In a specific embodiment, the vehicle environment information may include one or more environmental parameters affecting the vehicle's heat dissipation performance and their parameter values. As an example, the environmental parameters may include one or both of the environmental temperature and the altitude. The environmental parameters are mainly used to determine the heat dissipation capacity of the environment where the vehicle is located, and then correct the coolant flow rate of the range extender generator in combination with this heat dissipation capacity, so as to avoid as much as possible that the finally adopted coolant flow rate is too large, so that the coolant of the vehicle can be more reasonably scheduled, effectively ensuring the temperature control effect of the whole vehicle.

[0046] Specifically, in a feasible implementation manner, when the control device corrects the coolant flow rate according to the motor operating condition information and the vehicle environment information, it can predict the body heat dissipation rate of the range extender generator based on the motor operating condition information, and predict the corresponding environmental heat dissipation rate of the vehicle based on each environmental parameter and its parameter value in the vehicle environment information. Then, based on the body heat dissipation rate and the environmental heat dissipation rate, comprehensively determine the correction coefficient of the coolant flow rate, and use the determined correction coefficient to correct the coolant flow rate to obtain a more accurate coolant flow rate.

[0047] Optionally, the motor operating condition information in the above implementation manner may include the power parameter information and the temperature parameter information of the motor. Among them, the power parameter information may include the motor torque and the motor power, etc., and the temperature parameter information can be used to indicate at least one of the following two temperature differences:

[0048] (1) The temperature difference between the motor winding end temperature and the coolant temperature;

[0049] (2) The temperature difference between the engine oil temperature of the motor and the coolant temperature.

[0050] In this case, when the control device predicts the body heat dissipation rate of the range extender generator based on the motor operating condition information, specifically, it can first predict the first heat dissipation rate based on the power parameter information, and predict the second heat dissipation rate based on the temperature difference indicated by the temperature parameter information, and then perform a weighted operation on the first heat dissipation rate and the second heat dissipation rate to obtain the body heat dissipation rate. Among them, the weighted operation can include one or both of weighted average and weighted summation, and the weights used in the weighted operation can be configured according to the heat dissipation requirements, which are not limited here. In addition, it can be understood that since the greater the temperature difference in real life, the faster the heat dissipation rate, the second heat dissipation rate in the embodiments of the present application is positively correlated with the temperature difference indicated by the temperature parameter information.

[0051] S204. Perform temperature control on the range extender generator according to the corrected coolant flow rate.

[0052] In a specific embodiment, the control device can output the coolant corresponding to one or more target power modules of the vehicle to the range extender generator according to the corrected coolant flow rate to perform temperature control on the range extender generator. Among them, the target power module refers to the power module in the vehicle that can currently deliver coolant to the range extender generator, and when the coolants of multiple power modules in the vehicle can be mixed, the control device can determine one or more target power modules from these multiple power modules for temperature control of the range extender generator.

[0053] Optionally, the coolant flow rate output by each target power module can be determined based on the module temperature of the target power module, so that the target power module can provide coolant to the range extender generator while meeting (or taking into account) its own temperature control requirements, thereby maximizing the temperature control effect of the vehicle as a whole.

[0054] It should be added that, in one implementation, the vehicle can include both a power battery and a range extender generator, and the range extender generator is used to charge the power battery. In this case, the control device can also assist the range extender generator to reach the target temperature indicated by the temperature control target in the following manner:

[0055] After the temperature control of the range extender generator lasts for a preset duration, detect the current temperature of the range extender generator and obtain the temperature control target of the range extender generator, which is mainly used to indicate the target temperature expected to be achieved through temperature control. When the temperature difference between the current temperature and the target temperature is greater than or equal to the preset threshold, the control device can reduce the power generation power of the range extender generator to the target power, so as to reduce its own heat generation by reducing the power generation power, thereby accelerating the rate at which the range extender generator reaches the target temperature to a certain extent.

[0056] It is worth mentioning that the target power is determined based on the current power level and discharge rate of the power battery. Herein, the discharge rate specifically refers to the rate of power consumption of the power battery when the power battery independently supplies power to the drive motor to drive the vehicle. As an example, the control device can determine the duration required for the power level of the power battery to reach the minimum protection power level based on the current power level and discharge rate, and then predict the power that the range extender needs to adopt to adjust the temperature of the range extender to the target temperature within the aforementioned duration in the case where the range extender does not need to supply power to the drive motor and / or the power battery.

[0057] Since the range extender does not need to supply power to the drive motor and / or the power battery, its power generation can be reduced to a certain extent, so the heat generated by itself can be reduced, and finally it can assist the range extender to quickly reach the expected target temperature and improve the efficiency of temperature control.

[0058] In the embodiment of the present application, the coolant flow rate used for temperature control of the range extender is jointly determined by combining motor operating condition information and environmental information. By referring to the motor operating condition information, the current coolant flow rate can be made to meet the actual operating requirements of the motor, thereby reducing the negative impact on the motor operating efficiency caused by the coolant flow. By referring to the environmental information, the heat dissipation capacity existing in the environmental dimension can be utilized when controlling the temperature of the range extender, which is beneficial to determining a more accurate coolant flow rate from the vehicle dimension. That is to say, by using the embodiment of the present application to control the temperature of the range extender, the coolant flow rate that meets the motor operating requirements can be accurately determined, thereby improving the temperature control effect and motor operating efficiency of the range-extended hybrid vehicle.

[0059] For the convenience of quickly applying the technical solution proposed in the present application, the embodiment of the present application also provides a feasible calculation method for the coolant flow rate, which can be specifically referred to Figure 3 .

[0060] In Figure 3 , the oil temperature refers to the oil temperature of the range extender, the water temperature refers to the coolant temperature in the vehicle, and map1, map2, map3, and map4 are 4 configuration tables. As an example, each configuration table can be obtained through experimental tests based on relevant parameters.

[0061] Exemplarily, Figure 3The map1 in it may include fields such as coolant temperature, motor oil temperature, and coolant flow rate, and map1 is at least used to indicate the relationship between the coolant temperature and the motor oil temperature and the coolant flow rate. Map2 may include correction factor 1 of the coolant flow rate, motor speed, and motor torque, and is at least used to indicate the relationship between the motor speed and the motor torque and correction factor 1 of the coolant flow rate. Similarly, map3 and map4 in Figure 3 can be understood, and will not be elaborated here one by one.

[0062] Based on this, as Figure 3 shown, the way for the control device to control the temperature of the range extender generator can refer to the following description:

[0063] The control device first obtains the oil temperature (i.e., the engine oil temperature of the range extender generator) and the water temperature of the vehicle (i.e., the coolant temperature), and determines that the range extender generator is in a cold start state when the oil temperature is less than T1 (i.e., the rated oil temperature). To improve the power generation efficiency, the control device can perform a warming-up process on the range extender generator when it is in a cold start state.

[0064] Specifically, the control device can first obtain the temperature difference between the water temperature and the oil temperature, and when the temperature difference between the water temperature and the oil temperature is greater than the preset temperature difference T2, it is considered that the coolant has the ability to heat the range extender generator, and thus the first flow rate (such as Figure 3 Q1 in it) is used as the coolant flow rate adopted when controlling the temperature of the range extender generator. When the temperature difference between the water temperature and the oil temperature is less than or equal to the preset temperature difference T2, it can be considered that the coolant does not have the ability to heat the range extender generator, and thus the second flow rate approaching 0 (such as Figure 3 Q2 in it) is used as the coolant flow rate adopted when controlling the temperature of the range extender generator.

[0065] Correspondingly, when the oil temperature is greater than or equal to T1 (i.e., the rated oil temperature), it is determined that the range extender generator is in a normal start state. In this case, the control device can first look up the configuration table (such as Figure 3 map1 in it) based on the coolant temperature and the motor oil temperature (or engine oil temperature) to obtain an initial reference coolant flow rate, and then correct the coolant flow rate determined based on map1 according to the motor operating condition information and the vehicle environment information, so as to ensure that the finally actually applied coolant flow rate has a high accuracy.

[0066] During the specific correction, the control device can separately look up map2 based on power parameters such as motor speed and motor torque to obtain correction factor 1 of the coolant flow rate (such as Figure 3The coefficient 1 in it), the correction coefficient 2 of the coolant flow rate is obtained by looking up map3 based on the temperature at the end of the motor winding and the oil temperature of the motor, and the correction coefficient 3 of the coolant flow rate is obtained by looking up map4 based on the ambient temperature and altitude. Finally, the coolant flow rate determined based on map1 is corrected by combining the correction coefficients 1 to 3. Exemplarily, the control device can multiply the coolant flow rate by each correction coefficient to obtain the corrected coolant flow rate.

[0067] Figure 3 When the range extender generator is in a cold start state, the method shown in the figure determines the coolant flow rate based on the temperature difference between the water temperature and the oil temperature, and adopts a larger coolant flow rate when the temperature difference is large, which can make the engine oil of the range extender generator heat up quickly and ensure the power generation efficiency. In addition, when the range extender generator is not in a cold start state, the coolant flow rate is calculated by querying the configuration table measured in multiple dimensions, which can make the determined coolant flow rate have high accuracy, thereby reducing the problem of overall efficiency reduction caused by excessive coolant flow rate under some working conditions.

[0068] Based on the above Figure 2 shown method, an embodiment of the present application also proposes a temperature control device for a range extender generator. The device can be a computer program (including program code) running in the above control device and can implement Figure 2 shown method. Specifically, please refer to Figure 4 , the device can at least include: an acquisition unit 401, a flow rate determination unit 402, a flow rate correction unit 403, and a temperature control unit 404, where:

[0069] The acquisition unit 401 is configured to acquire the current engine oil temperature of the range extender generator and the coolant temperature of the vehicle when it detects that the range extender generator of the vehicle starts;

[0070] The flow rate determination unit 402 is configured to determine the coolant flow rate required for temperature control of the range extender generator according to the current engine oil temperature and the coolant temperature when the current engine oil temperature is greater than the rated engine oil temperature;

[0071] The flow rate correction unit 403 is configured to acquire the current motor condition information of the range extender generator and the vehicle environment information where the vehicle is currently located, and correct the coolant flow rate according to the motor condition information and the vehicle environment information to obtain the corrected coolant flow rate;

[0072] The temperature control unit 404 is configured to perform temperature control on the range extender generator according to the corrected coolant flow rate.

[0073] In one embodiment, the vehicle environment information includes one or more environmental parameters affecting the heat dissipation performance of the vehicle and their parameter values; when the flow correction unit corrects the coolant flow rate according to the motor operating condition information and the vehicle environment information to obtain the corrected coolant flow rate, it can be specifically used to perform:

[0074] Predict the body heat dissipation rate of the range extender generator based on the motor operating condition information;

[0075] Predict the environmental heat dissipation rate corresponding to the vehicle based on each environmental parameter and its parameter value in the vehicle environment information;

[0076] Based on the body heat dissipation rate and the environmental heat dissipation rate, determine the correction coefficient of the coolant flow rate, and use the correction coefficient to correct the coolant flow rate to obtain the corrected coolant flow rate.

[0077] In another embodiment, the motor operating condition information includes the power parameter information and temperature parameter information of the motor, and the temperature parameter information is used to indicate at least one of the following temperature differences: the temperature difference between the motor winding end temperature and the coolant temperature, the temperature difference between the motor oil temperature and the coolant temperature; when the flow correction unit predicts the body heat dissipation rate of the range extender generator based on the motor operating condition information, it can be specifically used to perform:

[0078] Predict the first heat dissipation rate based on the power parameter information, and predict the second heat dissipation rate based on the temperature difference indicated by the temperature parameter information, and the second heat dissipation rate is positively correlated with the temperature difference indicated by the temperature parameter information;

[0079] Perform a weighted operation on the first heat dissipation rate and the second heat dissipation rate to obtain the body heat dissipation rate.

[0080] In another embodiment, there is also a power battery in the vehicle, and the range extender generator is used to charge the power battery. The temperature control unit 404 can also be used to perform:

[0081] Obtain the temperature control target of the range extender generator, and the temperature control target is used to indicate the target temperature that is expected to be achieved through temperature control;

[0082] After the temperature control of the range extender generator lasts for a preset duration, detect the current temperature of the range extender generator;

[0083] When the temperature difference between the current temperature and the target temperature is greater than or equal to a preset threshold, reduce the power generation power of the range extender generator to the target power, and the target power is determined based on the current power and discharge rate of the power battery.

[0084] In yet another embodiment, when the temperature control unit 404 controls the temperature of the range extender generator according to the corrected coolant flow rate, it can specifically be used to perform:

[0085] According to the corrected coolant flow rate, output the coolant corresponding to one or more target power modules of the vehicle to the range extender generator to control the temperature of the range extender generator; wherein, the target power module refers to a power module that is allowed to deliver coolant to the range extender generator, and the coolant flow rate output by each target power module is determined based on the module temperature of the target power module.

[0086] In yet another embodiment, the flow rate determination unit 402 can also be used to perform:

[0087] When the current engine oil temperature is less than the rated engine oil temperature, obtain the temperature difference between the current engine oil temperature and the coolant temperature;

[0088] According to the temperature difference, determine whether the coolant has the ability to heat the engine oil of the range extender generator;

[0089] When the coolant has the heating ability, set the coolant flow rate to a first flow rate, and when the coolant does not have the heating ability, set the coolant flow rate to a second flow rate, where the first flow rate is greater than the second flow rate.

[0090] In yet another embodiment, when the flow rate determination unit 402 is used to determine the coolant flow rate required for controlling the temperature of the range extender generator according to the current engine oil temperature and the coolant temperature, it can specifically be used to perform:

[0091] Obtain a flow rate configuration table;

[0092] From the flow rate configuration table, query the coolant flow rate associated with the temperature group composed of the current engine oil temperature and the coolant temperature;

[0093] Use the queried coolant flow rate as the coolant flow rate required for controlling the temperature of the range extender generator.

[0094] It should be noted that Figure 4Each unit in the temperature control device of the range extender generator shown above is divided based on logical functions. The above-mentioned units can be separately or all combined into one or several other units to form, or some of them can be further split into multiple smaller units in terms of function to form, which can achieve the same operations without affecting the realization of the technical effects of the embodiments of this application. In other embodiments of this application, the above-mentioned device can also include other units. In practical applications, these functions can also be assisted by other units and can be achieved through the cooperation of multiple units.

[0095] Based on the relevant descriptions of the above-mentioned temperature control method and device of the range extender generator, the embodiments of this application also provide a control device. Please refer to Figure 5 . The control device at least includes a processor 501 and a storage medium 502, and the processor 501 and the storage medium 502 of the control device can be connected through a bus or other means. Among them, the storage medium can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory; optionally, it can also be at least one storage medium located far from the aforementioned processor. The processor 501 (or CPU (Central Processing Unit, central processor)) is the computing core and control core of the control device, which is suitable for implementing one or more computer programs, specifically suitable for loading and executing one or more computer programs to implement the corresponding method flow or corresponding functions.

[0096] Specifically, the above-mentioned storage medium 502 is a memory device in the control device, used to store programs and data. It can be understood that the storage medium 502 here can include both the built-in storage medium in the control device and, of course, the extended storage medium supported by the control device. The storage medium 502 provides a storage space, and the operating system of the control device is stored in this storage space. And, one or more computer programs suitable for being loaded and executed by the processor 501 are also stored in this storage space. These computer programs can be one or more program codes. It should be noted that, optionally, the control device can also be in communication connection with one or more target output devices 503 (such as servers, mobile terminal devices, information broadcast devices, etc.) and can trigger temperature control instructions by interacting with the target output devices 503.

[0097] Embodiments of the present application also provide a storage medium, which stores one or more computer programs corresponding to the temperature control method of the above range extender generator. Among them, the storage medium can specifically be a magnetic disk, an optical disc, a read-only memory (ROM), a random access memory (RAM), etc. When one or more processors load and execute one or more computer programs in the memory, the functions related to the temperature control method of the range extender generator described above can be implemented, which will not be elaborated here. In addition, the computer program can also be deployed to be executed on one or more devices capable of communicating with each other, which will not be elaborated here either.

[0098] In addition, embodiments of the present application also propose a schematic structural diagram of a vehicle controller. As Figure 6 shown, the vehicle controller in the embodiments of the present application exists in a vehicle, and the vehicle controller may include one or more of the following components: an automotive processor 601, a memory 602, and one or more application programs. Among them, one or more application programs can be stored in the memory 602 and are configured to be executed by one or more automotive processors 601. One or more application programs are configured to execute the temperature control method of the range extender generator described in the foregoing method embodiments.

[0099] The automotive processor 601 may include one or more processing cores. The automotive processor 601 connects various parts of the entire vehicle through various interfaces and lines, and executes various functions of the vehicle and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory 602, and by calling data stored in the memory 602. Optionally, the automotive processor 601 can be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), or programmable logic array (PLA).

[0100] In addition, the automotive processor 601 can integrate one or a combination of several of a central processing unit (CPU), a graphics processing unit (GPU), and a modem, etc. Among them, the CPU mainly processes the operating system, user interface, application programs, etc.; the GPU is responsible for rendering and drawing display content; the modem is used to process wireless communication. It can be understood that the above modem may not be integrated into the automotive processor 601 and can be implemented separately through a communication chip.

[0101] The memory 602 may include a Random Access Memory (RAM), or may also include a Read Only Memory. The memory 602 can be used to store instructions, programs, codes, code sets, or instruction sets. The memory 602 may include a program storage area and a data storage area. Among them, the program storage area can store instructions for implementing an operating system, instructions for implementing at least one function, instructions for implementing the above various method embodiments, etc. The data storage area can also store data created during the use of the vehicle.

[0102] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program, and the computer program can be stored in a storage medium. In addition, when the computer program is executed, it may include one or more processes such as the embodiments of the temperature control method of the range extender generator as described above.

[0103] It can be understood that the beneficial effects produced by using the same method in the temperature control device, control device, and storage medium of the range extender generator in this application are the same as those Figure 2 of the proposed temperature control method of the range extender generator, so they will not be elaborated here. In addition, the various embodiments disclosed above are only partial embodiments of this application and cannot be used to limit the scope of rights of this application. Those of ordinary skill in the art can understand all or part of the processes of the above embodiments, and the equivalent changes made according to the claims of this application still fall within the scope covered by the present invention.

Claims

1. A temperature control method for a range extender generator, characterized in that: include: When it is detected that the range extender generator of the vehicle is started, obtaining the current oil temperature of the range extender generator and the coolant temperature of the vehicle; When the current engine oil temperature is greater than the rated engine oil temperature, determining the coolant flow rate required for temperature control of the range extender generator according to the current engine oil temperature and the coolant temperature; Acquiring current motor operating condition information of the range extender generator and vehicle environment information of the vehicle, and correcting the coolant flow rate according to the motor operating condition information and the vehicle environment information to obtain a corrected coolant flow rate; The vehicle environment information includes one or more environmental parameters and parameter values ​​that affect the heat dissipation performance of the vehicle; The temperature of the range extender generator is controlled according to the corrected coolant flow rate.

2. The method according to claim 1, characterized in that The step of correcting the coolant flow rate according to the motor operating condition information and the vehicle environment information to obtain a corrected coolant flow rate includes: Predicting a heat dissipation rate of a fuselage of the range-extended generator based on the motor operating condition information; Based on each environmental parameter and its parameter value in the vehicle environmental information, predicting the environmental heat dissipation rate corresponding to the vehicle; Based on the heat dissipation rate of the fuselage and the environmental heat dissipation rate, a correction coefficient of the coolant flow rate is determined, and the coolant flow rate is corrected using the correction coefficient to obtain the corrected coolant flow rate.

3. The method according to claim 2, characterized in that The motor operating condition information includes power parameter information and temperature parameter information of the motor, and the temperature parameter information is used to indicate at least one of the following temperature differences: the temperature difference between the motor winding end temperature and the coolant temperature, and the temperature difference between the motor oil temperature and the coolant temperature; The predicting the heat dissipation rate of the range-extended generator based on the motor operating condition information includes: Predicting a first heat dissipation rate based on the power parameter information, and predicting a second heat dissipation rate based on the temperature difference indicated by the temperature parameter information, wherein the second heat dissipation rate is positively correlated with the temperature difference indicated by the temperature parameter information; A weighted calculation is performed on the first heat dissipation rate and the second heat dissipation rate to obtain the body heat dissipation rate.

4. The method according to claim 1, characterized in that The vehicle also has a power battery, and the range extender generator is used to charge the power battery; the method further includes: Acquiring a temperature control target of the range-extended generator, wherein the temperature control target is used to indicate a target temperature expected to be achieved through temperature control; After the temperature of the range extender generator is controlled for a preset time period, detecting a current temperature of the range extender generator; When the temperature difference between the current temperature and the target temperature is greater than or equal to a preset threshold, the power generation power of the range extender generator is reduced to a target power, where the target power is determined based on the current power level and the discharge rate of the power battery.

5. The method according to any one of claims 1 to 4, characterized in that: The temperature control of the range extender generator according to the corrected coolant flow rate includes: outputting coolant corresponding to one or more target power modules of the vehicle to the range-extended generator according to the corrected coolant flow rate, so as to control the temperature of the range-extended generator; The target power module refers to a power module that is allowed to deliver coolant to the range extender generator, and the coolant flow rate output by each target power module is determined based on the module temperature of the target power module.

6. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: When the current engine oil temperature is less than the rated engine oil temperature, obtaining a temperature difference between the current engine oil temperature and the coolant temperature; determining, based on the temperature difference, whether the coolant has the ability to heat the engine oil of the range extender generator; When the coolant has heating capability, the coolant flow rate is set to a first flow rate, and when the coolant has no heating capability, the coolant flow rate is set to a second flow rate, wherein the first flow rate is greater than the second flow rate.

7. The method according to claim 1, characterized in that The step of determining the coolant flow rate required for temperature control of the range extender generator according to the current engine oil temperature and the coolant temperature includes: Get the flow configuration table; querying the coolant flow rate associated with the temperature group consisting of the current engine oil temperature and the coolant temperature from the flow configuration table; The queried coolant flow rate is used as the coolant flow rate required for temperature control of the range extender generator.

8. A temperature control device for a range-extended generator, characterized in that: include: an acquisition unit, configured to acquire a current oil temperature of the range extender generator and a coolant temperature of the vehicle when detecting that the range extender generator of the vehicle is started; a flow determination unit, configured to determine, when the current engine oil temperature is greater than a rated engine oil temperature, a coolant flow required for temperature control of the range extender generator according to the current engine oil temperature and the coolant temperature; a flow correction unit, configured to obtain current motor operating condition information of the range extender generator and vehicle environment information of the vehicle, and to correct the coolant flow according to the motor operating condition information and the vehicle environment information to obtain a corrected coolant flow; The vehicle environment information includes one or more environmental parameters and parameter values ​​that affect the heat dissipation performance of the vehicle; A temperature control unit is used to control the temperature of the range extender generator according to the corrected coolant flow rate.

9. A control device, characterized in that: include: a processor adapted to implement one or more instructions; A storage medium storing one or more instructions, wherein the one or more instructions are suitable for being loaded by the processor and executing the method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores one or more instructions, and the one or more instructions are suitable for being loaded by a processor and executing the method according to any one of claims 1 to 7.

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