Temperature control method and system, vehicle and computer program product

Abstract

The invention provides a temperature control method which comprises the steps that the temperature of a first fluid medium flowing through a vehicle driving system is obtained, and the first fluid medium is used for absorbing heat released by the vehicle driving system and circularly flows between the vehicle driving system and a thermostat; according to the temperature of the first fluid medium, the heating power of the thermostat is determined; based on the heating power, a thermostat is controlled to heat a first fluid medium, the first fluid medium is maintained in a target temperature range through heating of the thermostat, and a valve of the thermostat is opened at a target opening degree in the target temperature range; the second fluid medium flowing through the heat demand component exchanges heat with the first fluid medium through the opened valve, and the heat demand component obtains heat released by the vehicle driving system through the second fluid medium which exchanges heat with the first fluid medium. The invention further provides a temperature control system, a vehicle and a computer program product.

Description

Technical Field

[0001] The present disclosure relates to the field of thermal management, and in particular to a temperature control method, a temperature control system, a vehicle, and a computer program product. Background Art

[0002] Usually, a thermostat is arranged between the driving system and the heat demanding component of the vehicle. After the cooling oil flowing through the driving system absorbs enough heat in the driving system to open the thermostat valve, the coolant flowing through the heat demanding component exchanges heat with the cooling oil in the thermostat body through the opened valve, recovering the excess heat generated by the driving system to the heat demanding component, so that the ambient temperature of the heat demanding component reaches its optimum working temperature.

[0003] However, if the driving efficiency of the drive system is high enough, the waste heat generated by the driving process of the vehicle will be relatively reduced, and it will be difficult to open the thermostat valve to achieve heat exchange. Obviously, it is difficult for traditional thermostats to balance the driving efficiency and the heat recovery requirements of heat-demanding components. Summary of the invention

[0004] The present disclosure provides a temperature control method, a temperature control system, a vehicle, and a computer program product.

[0005] According to one aspect of the present disclosure, a temperature control method is provided, comprising: obtaining the temperature of a first fluid medium flowing through a vehicle drive system, the first fluid medium being used to absorb heat released by the vehicle drive system and circulate between the vehicle drive system and a thermostat; determining a heating power of the thermostat according to the temperature of the first fluid medium; and controlling the thermostat to heat the first fluid medium based on the heating power, wherein the first fluid medium is maintained within a target temperature range by being heated by the thermostat, a valve of the thermostat is opened at a target opening within the target temperature range, a second fluid medium flowing through a heat demanding component performs heat exchange with the first fluid medium via the opened valve, and the heat demanding component obtains the heat released by the vehicle drive system through the second fluid medium that performs heat exchange with the first fluid medium.

[0006] In some embodiments, determining the heating power of the thermostat according to the temperature of the first fluid medium includes: determining the heating power to be a first power when the temperature of the first fluid medium is greater than a first temperature threshold and the heat demand component has a heat demand.

[0007] In some embodiments, determining the heating power of the thermostat according to the temperature of the first fluid medium includes: when the temperature of the first fluid medium is greater than a third temperature threshold, determining a second power corresponding to the temperature of the first fluid medium.

[0008] In some embodiments, determining the heating power of the thermostat according to the temperature of the first fluid medium includes: when the temperature of the first fluid medium is less than or equal to a second temperature threshold, determining the heating power to be a first power.

[0009] In some embodiments, after determining the heating power of the thermostat according to the temperature of the first fluid medium, it also includes: controlling the thermostat to stop heating when the temperature of the first fluid medium is greater than or equal to a fourth temperature threshold, the heat demand component has no heat demand, the flow rate of the first fluid medium is zero, or the temperature of the first fluid medium is less than or equal to the first temperature threshold and maintained for a first time period.

[0010] In some embodiments, before determining the heating power of the thermostat according to the temperature of the first fluid medium, it also includes: determining a first temperature threshold, a second temperature threshold, a third temperature threshold and a fourth temperature threshold according to the heating capacity of the thermostat and the material properties of the valve.

[0011] In some embodiments, a first temperature threshold, a second temperature threshold, a third temperature threshold and a fourth temperature threshold are determined based on the heating capacity of the thermostat and the material properties of the valve, including: controlling the thermostat to a first power, determining the lowest temperature of the first fluid medium that makes the opening of the valve greater than zero as the first temperature threshold, and determining the lowest temperature of the first fluid medium that makes the valve reach a target opening as the second temperature threshold; and controlling the thermostat not to heat, determining the lowest temperature of the first fluid medium that makes the opening of the valve greater than zero as the third temperature threshold, and determining the lowest temperature of the first fluid medium that makes the valve reach a target opening as the fourth temperature threshold.

[0012] In some embodiments, the first temperature threshold, the second temperature threshold, the third temperature threshold and the fourth temperature threshold are determined according to the heating capacity of the thermostat and the material properties of the valve, including: controlling the thermostat to a first power, determining the lowest temperature of the first fluid medium that makes the opening of the valve greater than zero as a first basic temperature, and determining the lowest temperature of the first fluid medium that makes the valve reach a target opening as a second basic temperature; controlling the thermostat not to heat, determining the lowest temperature of the first fluid medium that makes the opening of the valve greater than zero as a third basic temperature, and determining the lowest temperature of the first fluid medium that makes the valve reach a target opening as a fourth basic temperature; according to the temperature fluctuation amplitude of the first fluid medium, superimposing a first hysteresis value, a second hysteresis value, a third hysteresis value and a fourth hysteresis value on the first basic temperature, the second basic temperature, the third basic temperature and the fourth basic temperature, respectively, to obtain the first temperature threshold, the second temperature threshold, the third temperature threshold and the fourth temperature threshold.

[0013] In some implementations, the method further includes: after the thermostat fails, controlling the thermostat to stop heating.

[0014] In some embodiments, after controlling the thermostat to stop heating, the method includes: after the failure of the thermostat is resolved, determining the heating power of the thermostat according to the temperature of the first fluid medium.

[0015] In some embodiments, before determining the heating power of the thermostat according to the temperature of the first fluid medium, it also includes: determining whether a heat-demanding component has a heat demand, including: the heat-demanding component is a vehicle battery, and determining that the vehicle battery has a heat demand when the vehicle battery does not issue a cooling request, the maximum temperature of the vehicle battery is less than a battery temperature threshold, the remaining charge of the vehicle battery is less than a charge threshold, and the ambient temperature of the vehicle battery is less than an ambient temperature threshold.

[0016] In some embodiments, the first fluid medium is cooling oil, and the second fluid medium is cooling liquid.

[0017] According to another aspect of the present disclosure, a temperature control system is provided, comprising a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the following process: obtaining the temperature of a first fluid medium flowing through a vehicle drive system, the first fluid medium being used to absorb heat released by the vehicle drive system and circulate between the vehicle drive system and a thermostat; determining a heating power of the thermostat according to the temperature of the first fluid medium; and controlling the thermostat to heat the first fluid medium based on the heating power, wherein the first fluid medium is maintained within a target temperature range after being heated by the thermostat, within which the valve of the thermostat is opened at a target opening, and a second fluid medium flowing through a heat-demanding component exchanges heat with the first fluid medium via the opened valve, and the heat-demanding component obtains the heat released by the vehicle drive system through the second fluid medium that exchanges heat with the first fluid medium.

[0018] According to yet another aspect of the present disclosure, a vehicle is provided, comprising a temperature control system according to any one of the above embodiments.

[0019] According to another aspect of the present disclosure, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, it is used to implement at least the method as described in any one of the above embodiments.

[0020] According to the technical solution disclosed in the present invention, under the condition that the drive system generates less heat, the temperature of the first fluid medium is assisted by controlling the heating power of the thermostat, so that the thermostat valve is opened early to the target opening, so as to efficiently recover the heat released by the drive system to the heat demanding components, thereby achieving a balance between the vehicle driving efficiency and the heat recovery demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0022] Figure 1 It is a schematic diagram of an application scenario of the temperature control method according to an embodiment of the present disclosure.

[0023] Figure 2 It is an interactive schematic flow chart of a temperature control method according to an embodiment of the present disclosure.

[0024] Figure 3 is a schematic diagram of a thermostat application circuit according to an embodiment of the present disclosure.

[0025] Figure 4is a schematic flow chart of a temperature control method according to an embodiment of the present disclosure.

[0026] Figure 5 is a thermostat opening curve diagram according to an embodiment of the present disclosure.

[0027] Figure 6 is a thermostat power curve diagram according to an embodiment of the present disclosure.

[0028] Figure 7 Schematic diagram of the thermostat working state according to an embodiment of the present disclosure.

[0029] Figure 8 is a flow chart of a temperature control method according to an embodiment of the present disclosure.

[0030] Fig. 9 is a block diagram of a temperature control device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] The present disclosure is further described in detail below in conjunction with the accompanying drawings and examples. It is understood that the specific examples described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Ideally, the vehicle's drive system will convert all electrical energy into mechanical energy when driving the vehicle. However, due to equipment limitations, the drive efficiency of the drive system is difficult to reach 100%, and some electrical energy will be released in the form of heat. Usually, a thermostat is set between the drive system and the heat-demanding component. The thermostat has a valve. After the cooling oil flowing through the drive system absorbs enough heat from the drive system to open the valve, the valve is opened, and the coolant flowing through the heat-demanding component circulates through the valve to the thermostat body and exchanges heat with the cooling oil. Then, the coolant obtains the heat released by the drive system and provides the optimal working environment temperature for the heat-demanding component, so that the heat-demanding component presents better performance. In other words, the valve opening condition of the traditional thermostat is that the cooling oil flowing through the thermostat has a sufficiently high temperature, but if the cooling oil has a sufficiently high temperature, it means that the drive efficiency of the drive system is relatively low. Obviously, it is difficult for the relevant technology to balance the driving efficiency and the heat recovery needs of the vehicle.

[0034] To this end, the present disclosure proposes a temperature control method.

[0035] Figure 1It is a schematic diagram of an application scenario of the temperature control method according to an embodiment of the present disclosure.

[0036] exist Figure 1 In the scenario shown, a server 100 and a vehicle 110 may be included. The server 100 may be a cloud server or a physical server. The vehicle 110 has a thermostat with controllable heating power, a drive system, and a heat demand component. The server 100 and the vehicle 110 are connected via a network or Bluetooth. The first fluid medium flows through the drive system and absorbs the heat released by the drive system. Then, when the first fluid medium flows through the thermostat, the thermostat measures the temperature of the first fluid medium and sends the measured temperature to the server 100 through the communication unit of the vehicle 110. The server 100 executes a temperature control method, determines the heating power of the thermostat based on the temperature of the first fluid medium, and controls a thermostat to heat the first fluid medium with the determined heating power, so as to open the thermostat valve in advance, so that the second fluid medium flowing through the heat demand component passes through the valve and exchanges heat with the first fluid medium.

[0037] In the aforementioned application scenario, the server 100 controls the heating power of the thermostat in the vehicle 110 according to the temperature of the first fluid medium in the vehicle 110, so that in the scenario of high driving efficiency in the vehicle 110, the temperature of the first fluid medium is increased by the thermostat to open the thermostat valve, thereby realizing heat exchange between the first fluid medium and the second fluid medium. This avoids the problem that the drive system generates less heat and cannot open the valve and cannot supply heat to the heat demanding components, thus achieving a balance between driving efficiency and heat recovery requirements.

[0038] For the convenience of description and to make the technical solutions of the specific embodiments of the present disclosure easier to understand, before describing the temperature control method implemented in the present disclosure, the technical terms involved in the specific embodiments of the present disclosure are defined as follows: Drive system: It is a device in the vehicle that converts electrical energy or chemical energy into kinetic energy, such as the vehicle's main battery, engine, etc. When the drive system drives the vehicle forward, it converts electrical energy or chemical energy into kinetic energy and thermal energy, where thermal energy is expressed in the form of heat. Generally, the heat released by the drive system is inversely proportional to its driving efficiency.

[0039] Thermostat: It has a main body, a valve and a heater, and is a hardware device that controls the flow path of the coolant. The main body of the thermostat provides a circulation channel for the first fluid medium, and the first fluid medium circulates between the drive system and the thermostat. The valve is usually a temperature-sensitive component, which can shrink / melt or expand / solidify according to the temperature of the first fluid medium flowing through the valve to change the flow channel of the second fluid medium flowing through the heat-demanding component. The heater heats the first fluid medium according to the heating power, and controls the opening and closing of the valve by controlling the temperature of the first fluid medium.

[0040] Heat demanding components: hardware devices in the vehicle that have heat demand. For example, batteries can only have high working efficiency and good performance in the most suitable ambient temperature. In order to reduce the energy consumption of the entire vehicle, the heat released by the drive system can be recovered to maintain the ambient temperature required for its own operation.

[0041] The first fluid medium is a coolant that flows through the drive system and absorbs the heat released by the drive system, and is usually cooling oil that can lubricate the drive system. The first fluid medium circulates between the drive system and the thermostat.

[0042] Second fluid medium: a coolant that flows through the heat demanding component and is used to maintain the ambient temperature of the heat demanding component, usually a coolant. When the thermostat valve is opened, the second fluid medium circulates between the thermostat and the heat demanding component and exchanges heat with the first fluid medium in the main body of the thermostat to recover the heat released by the drive system to the heat demanding component, so that the ambient temperature of the heat recovery component reaches the optimal working temperature.

[0043] Figure 2 is an interactive schematic flow chart of a temperature control method according to an embodiment of the present disclosure. Figure 1 The server 100, the thermostat in the vehicle 110, and the first fluid medium flowing through the drive system of the vehicle 110 are combined below. Figure 2 An overall description of the method is given.

[0044] In step S201, the server determines the first basic temperature, the second basic temperature, the third basic temperature and the fourth basic temperature according to the heating capacity of the thermostat and the material properties of the valve. The first basic temperature is the lowest temperature of the first fluid medium that makes the valve opening greater than zero when the thermostat is heated at the first power; the second basic temperature is the lowest temperature of the first fluid medium that makes the valve reach the target opening when the thermostat is heated at the first power; the third basic temperature is the lowest temperature of the first fluid medium that makes the valve opening greater than zero when the thermostat is not heated, and the heat source of the first fluid medium is only the heat released by the drive system; the fourth basic temperature is the lowest temperature of the first fluid medium that makes the valve reach the target opening when the thermostat is not heated, and the heat source of the first fluid medium is only the heat released by the drive system.

[0045] Under ideal conditions, the first to fourth basic temperatures can be used as adjustment standards for controlling the heating power of the thermostat.

[0046] However, the temperature of the first fluid medium may be affected by factors such as changes in the outside air temperature and increased load on the drive system (such as vehicle climbing or hormones), causing temperature fluctuations. In order to overcome the temperature fluctuations caused by such short-term changes, the server executes step S202, and superimposes the first hysteresis value to the fourth hysteresis value on the first basic temperature to the fourth basic temperature, respectively, to obtain the first temperature threshold to the fourth temperature threshold, and provide a tolerance space for the temperature fluctuation of the first fluid medium. For example, according to the control logic of the present disclosure, when the temperature of the first fluid medium is greater than the first basic temperature, the thermostat will be triggered to heat the first fluid medium with the first power; however, if the temperature of the first fluid medium surges to a temperature greater than the first basic temperature due to interference from some factors, and then quickly returns to a temperature less than the first basic temperature, then this meaningless and frequent control of the thermostat on and off will unintentionally shorten its service life. At this time, according to the temperature fluctuation amplitude of the first fluid medium, the first hysteresis value is superimposed on the first basic temperature. In this way, when the temperature of the first fluid medium is less than the first basic temperature and the fluctuation amplitude does not reach the first hysteresis value, the heater in the thermostat will not be turned on, avoiding the problem of frequent switching of the heater due to small floating temperature fluctuations.

[0047] In step S203 , the thermostat detects the temperature of the first fluid medium.

[0048] The first fluid medium flows through the drive system and absorbs the heat released by the drive system, thereby increasing its own temperature. The thermostat body has a channel for the first fluid medium to flow, and a temperature measuring device is arranged near the channel. When the first fluid medium flows to the body, the temperature measuring device is triggered to measure the temperature of the first fluid medium.

[0049] In step S204 , the thermostat sends the temperature of the first fluid medium to the server.

[0050] The vehicle equipped with the thermostat is connected to the server through a network connection or a Bluetooth connection, and the temperature measured by the thermostat can be sent to the server. The real-time temperature of the first fluid medium is the data basis for the server to control the thermostat to select the heating power, so after the thermostat obtains the temperature of the first fluid medium, it should be sent to the server in a timely manner.

[0051] In step S205 , the server determines whether the temperature of the first fluid medium sent by the thermostat is greater than a first temperature threshold.

[0052] The first temperature threshold is the lowest temperature of the first fluid medium that can cause the thermostat valve to open when the thermostat heats the first fluid medium at the first power. Therefore, when the first fluid medium reaches the first temperature threshold by absorbing the heat of the drive system, the valve can be opened by adjusting the heating power of the thermostat to the first power. In this way, even if the driving efficiency of the drive system is high enough and does not release more heat, the small amount of heat generated can be used to meet the heat recovery demand of the heat demand component, thereby balancing the heat recovery demand and the driving efficiency.

[0053] In step S206, if the temperature of the first fluid medium is greater than the first temperature threshold, the thermostat is controlled to the first power. Then, the thermostat executes step S207 to heat the first fluid medium at the first power. The first power may be full power, that is, the heater in the thermostat is at the maximum output power (i.e., 100%).

[0054] At this time, the first fluid medium is still circulating between the thermostat and the drive system. If the valve is opened after being heated by the first power, the second fluid medium flowing through the heat demanding component will also flow into the channel of the thermostat body and perform non-contact heat exchange with the first fluid medium. During the process of the first fluid medium circulating between the thermostat and the drive system and heat exchange with the second fluid medium, it absorbs heat from the thermostat and the drive system on the one hand, and releases heat to the second fluid medium on the other hand. Based on this, the temperature of the first fluid medium changes all the time, and the thermostat will continue to execute steps S208 to S209. The temperature measuring device of the thermostat will constantly detect the temperature of the first fluid medium and synchronize the measured temperature to the server. Furthermore, the server will also continue to execute step S210 to determine whether the real-time temperature of the first fluid medium is greater than the third temperature threshold.

[0055] In step S211, when the temperature of the first fluid medium is greater than the third temperature threshold, the server controls the thermostat to a second power.

[0056] The third temperature threshold is the lowest temperature at which the valve can be opened by the first fluid medium only by absorbing the heat of the drive system when the thermostat is not heated. However, in the aforementioned scenario, the thermostat heats the first fluid medium by the first power, and the valve is already at the target opening; if the first fluid medium is continuously heated by the first power, the valve of the thermostat may fail or be damaged due to overheating, so that it cannot be opened or closed normally, and cannot play the effect of adjusting the flow path of the coolant of the heat-demanding components, and may even affect the normal operation of the vehicle. Therefore, when the first fluid medium is greater than the third temperature threshold, the heating power of the thermostat should be adjusted according to the temperature of the first fluid medium, so that the valve is at the target opening and there is no overheating.

[0057] It should be noted that the second power corresponds to various process heating gears of the thermostat heater, and the thermostat will generate corresponding heating power when it is in different heating gears. For example, when the temperature of the first fluid medium is between the third temperature threshold and 50°, the heating power of the thermostat is controlled to be 80%, and the first process gear is selected at this time, and the third temperature threshold should be less than 50°; when the temperature of the first fluid medium is between 50° and 60°, the heating power of the thermostat is controlled to be 60%, and the second process gear is selected at this time; when the temperature of the first fluid medium is between 60° and 70°, the heating power of the thermostat is controlled to be 40%, and the third process gear is selected at this time; when the temperature of the first fluid medium is between 70° and 80°, the heating power of the thermostat is controlled to be 20%, and the fourth process gear is selected at this time.

[0058] In step S212 , the thermostat heats the first fluid medium at the second power, so that the temperature of the first fluid medium can just control the valve to a target opening without overheating.

[0059] At this time, the first fluid medium is still circulating between the thermostat and the drive system. When the valve is at the target opening, the second fluid medium flows into the channel of the thermostat body at the maximum flow rate allowed by the thermostat, and performs non-contact heat exchange with the first fluid medium at the highest efficiency. During the circulation of the first fluid medium between the thermostat and the drive system and the heat exchange with the second fluid medium, it absorbs heat from the thermostat and the drive system on the one hand, and releases heat to the second fluid medium on the other hand. Based on this, the temperature of the first fluid medium changes all the time, and the thermostat will continue to execute steps S213 to S214. The temperature measuring device of the thermostat will always detect the temperature of the first fluid medium and synchronize the measured temperature to the server.

[0060] Furthermore, the server will continue to execute step S215 to determine whether the real-time temperature of the first fluid medium is less than the second temperature threshold. Specifically, since the second fluid medium absorbs the heat of the first fluid medium at the maximum efficiency allowed by the thermostat, assuming that the driving efficiency of the drive system is high enough and continuously and stably generates less heat, if the heater heats the first fluid medium at a heating power less than the first power at this time, then the temperature of the first fluid medium may soon be lower than the second temperature threshold, causing the thermostat valve to open at a degree less than the target opening, reducing the heat exchange efficiency. Therefore, when the temperature of the first fluid medium is less than the second temperature threshold, the server executes step S216 to control the thermostat to the first power.

[0061] Then, the thermostat executes step S217 to heat the first fluid medium at the first power. Then, steps S208 to S217 are repeatedly executed. After the first fluid medium reaches the third temperature threshold, the server controls the thermostat to the second power. By repeating steps S208 to S217, the temperature of the first fluid medium is continuously within the target temperature range, and the valve is stably maintained at the target opening within the target temperature range, thereby ensuring the maximum efficiency of heat exchange.

[0062] After the aforementioned control logic, the first fluid medium finally implements step S218 and reaches the target temperature. The first fluid medium circulates between the thermostat and the drive system, so that the thermostat executes step S219 and the valve is opened to the target opening. The second fluid medium circulates between the thermostat and the heat demand component through the valve, and exchanges heat with the first fluid medium when passing through the thermostat, so that the ambient temperature of the heat demand component finally reaches the optimal working temperature.

[0063] In some embodiments, the first fluid medium still circulates between the thermostat and the drive system. Furthermore, the thermostat still continues to execute step S220 to detect the temperature of the first fluid medium flowing through its body, and executes step S221 to send the temperature of the first fluid medium to the server, so that the server can control the heating power of the thermostat according to the temperature of the first fluid medium.

[0064] In step S222, if the server determines that the temperature of the first fluid medium is greater than the fourth temperature threshold or less than the first temperature threshold, step S223 is executed to control the thermostat to stop heating. In other words, when the temperature of the first fluid medium is less than the first temperature threshold and is maintained for a certain first time period, it proves that the heat generated by the drive system is too little, and even if the thermostat heats the first fluid medium at the first power, the valve cannot be opened; at this time, the first fluid medium needs to continue to absorb the heat released by the drive system until the first fluid medium reaches the first temperature threshold. When the temperature of the first fluid medium is greater than the fourth temperature threshold, the first fluid medium can still open the valve only by relying on the heat absorbed from the drive system, so there is no need to trigger the thermostat to heat, resulting in unnecessary energy waste, and there is also a risk of valve overheating.

[0065] Of course, when the flow rate of the first fluid medium is 0, or when the heat demand component does not have a heat recovery demand, the server can control the thermostat to stop heating.

[0066] Under the control of the server, the thermostat executes step S224 to stop heating the first fluid medium.

[0067] The present disclosure controls the heating power of the thermostat according to the temperature of the first fluid medium through the aforementioned technical means. When the drive system releases less heat, the valve can still be opened to the target opening, so that the first fluid medium and the second fluid medium can exchange heat with maximum efficiency, and the drive efficiency and heat recovery requirements are balanced.

[0068] The above describes the interaction between the server, the thermostat and the first fluid medium when implementing the temperature control method. The following describes the specific implementation of the temperature control method in detail.

[0069] Figure 3 Schematic diagram of thermostat application circuit according to the embodiment of the present disclosure. Figure 3 The relationship between the thermostat, drive system, and heat demand components is explained.

[0070] The first fluid medium flows through the drive system, absorbs excess heat released by the drive system, and circulates between the drive system and the thermostat along the dotted path. The thermostat is provided with a temperature measuring device, a heater, and a valve. When the first fluid medium flows to the temperature measuring device, the temperature measuring device will measure the real-time temperature of the first fluid medium and upload it to the server; when the first fluid medium flows to the heater, the heater will heat the first fluid medium according to the heating power determined by the server to maintain it at the target temperature. The target temperature is the temperature at which the valve can be opened to the target opening. When the first fluid medium with the target temperature flows to the valve, the valve will sense the temperature of the first fluid medium and shrink or melt, and then be opened to the target opening. It should be noted that the first fluid medium can be cooling oil. The flow trajectory of the first fluid medium between the drive system and the thermostat can be the remaining trajectory other than that shown by the dotted line, Figure 3 For illustration only.

[0071] There are two pumps between the heat demand component and the thermostat to drive the flow of the second fluid medium, and the pump is a power device. When the valve is closed, the pump near the thermostat stops working, and the second fluid medium only flows near the heat demand component under the action of the pump near the heat demand component. When the valve is opened, the pump near the thermostat starts working, driving the second fluid medium to circulate between the heat demand component and the thermostat. The second fluid medium and the first fluid medium flow in parallel in the main body of the thermostat and achieve heat exchange. Of course, the two do not need to be in direct contact. After obtaining the heat of the first fluid medium, the second fluid medium circulates to the heat demand component, providing the heat demand component with the ambient temperature required for operation, so that the ambient temperature of the heat demand component is sufficient to support it to have better equipment performance. If the heat demand component is a battery, then at the optimal ambient temperature, the battery can drive the vehicle to travel a longer distance and have a longer service life.

[0072] Figure 4 is a schematic flow chart of a temperature control method according to an embodiment of the present disclosure. Figure 4 , the temperature control method is described, wherein the temperature control method includes steps S401 to S407.

[0073] In step S401 , a first temperature threshold, a second temperature threshold, a third temperature threshold, and a fourth temperature threshold are determined.

[0074] Figure 5 is a thermostat opening curve diagram according to an embodiment of the present disclosure. Figure 5 As shown, the relationship between the temperature of the first fluid medium and the opening of the thermostat valve is determined according to factors such as the heating capacity of the heater in the thermostat (such as the heating power range, etc.), the material properties of the valve (such as the melting point, etc.), and the like.

[0075] exist Figure 5 The middle horizontal axis represents the base temperature of the first fluid medium before the thermostat heats the first fluid medium, and the vertical axis represents the thermostat valve opening. The solid line represents the relationship between the base temperature of the first fluid medium and the valve opening when the thermostat heats the first fluid medium at the first power. The black dotted line represents the relationship between the base temperature of the first fluid medium and the valve opening when the thermostat is not heating. It can be seen that after the thermostat heats the first fluid medium at the first power, the valve can also be opened when the temperature of the first fluid medium is very low; when the temperature of the first fluid medium is relatively low, the valve can reach the target opening. In other words, after the thermostat participates in the heating of the first fluid medium, when heat recovery is achieved, the drive system is allowed to release a small amount of heat to open the valve. A balance is achieved between drive efficiency and heat recovery requirements.

[0076] Specifically, Temp1 represents the lowest temperature at which the first fluid medium can open the valve when the thermostat is heated at the first power, i.e., the first basic temperature; Temp2 represents the lowest temperature at which the first fluid medium can open the valve to the target opening when the thermostat is heated at the first power, i.e., the second basic temperature. Temp3 represents the lowest temperature at which the first fluid medium can open the valve when the thermostat is not heated, i.e., the third basic temperature; Temp4 represents the lowest temperature at which the first fluid medium can open the valve to the target opening when the thermostat is not heated, i.e., the fourth basic temperature.

[0077] In an ideal state, Temp1 to Temp4 can be directly used as the first temperature threshold to the fourth temperature threshold. However, in order to overcome the temperature fluctuation of the first fluid medium in an actual application scenario, hysteresis values ​​are set for Temp1 to Temp4 respectively to provide a tolerance space for temperature fluctuation for the first fluid medium, thereby forming the first temperature threshold to the fourth temperature threshold superimposed with the first hysteresis value to the fourth hysteresis value.

[0078] Figure 6 is a thermostat power curve diagram according to an embodiment of the present disclosure. Figure 6 As shown, the black solid line represents the relationship between the temperature of the first fluid medium and the heating power of the thermostat, and the arrow represents the direction of the change of the heating power. The abscissa represents the basic temperature of the first fluid medium, and the ordinate represents the heating power of the thermostat.

[0079] Temp1' is the result of superimposing the hysteresis value on Temp1, and the difference between the two is the first hysteresis value; similarly, Temp2' is the result of superimposing the hysteresis value on Temp2, and the difference between the two is the second hysteresis value; Temp3' is the result of superimposing the hysteresis value on Temp3, and the difference between the two is the third hysteresis value; Temp4' is the result of superimposing the hysteresis value on Temp4, and the difference between the two is the fourth hysteresis value. According to the temperature fluctuation amplitude of the first fluid medium and the purpose of the tolerance space, the first hysteresis temperature is a positive number, and the second hysteresis temperature to the fourth hysteresis temperature are negative numbers. Therefore, Temp1' is greater than Temp1, Temp2' is less than Temp2, Temp3' is less than Temp3, and Temp4' is less than Temp4'.

[0080] When the temperature of the first fluid medium is Temp1, you should adjust the heating power of the thermostat to the first power, that is, 100% full power state; however, in order to avoid the problem that the drive system releases relatively more heat in a short period of time in scenarios such as vehicle climbing but quickly returns to normal driving state, the first hysteresis value is set. When the temperature of the first fluid medium rises and reaches Temp1', the thermostat heating power will be set to 100%. Similarly, when the temperature of the first fluid medium is less than or equal to Temp2', the thermostat heating power is reset to 100% to avoid the disadvantage of frequent adjustment of heating power due to small fluctuations. When the temperature of the first fluid medium reaches Temp3', the heating power is controlled to the second power, that is, the heating gear is gradually adjusted according to the temperature. The second power should be between 10% and 0%. Similarly, when the temperature of the first fluid medium is Temp4', the thermostat is controlled to stop heating in advance, and the heating power is 0%. Y1% and Y2% are the fourth gear and the first gear respectively, which can be 20% and 80%. Different thermostats have different comparison relationships between the first fluid medium temperature and the thermostat heating power. In other words, the relationship curve is determined by the properties of the thermostat and is not limited here.

[0081] In step S402, the heating power of the thermostat is determined according to the temperature of the first fluid medium.

[0082] Figure 7 Schematic diagram of the thermostat working state according to the embodiment of the present disclosure. Figure 7 , which shows the changes in the working state of the thermostat under normal circumstances and the changes in the working state of the thermostat under fault conditions.

[0083] In the initial state, the thermostat is not in operation. At this time, the heater of the thermostat is in the OFF position, and the heater does not heat the first fluid medium flowing through the thermostat body. 介质1 When the temperature is greater than the first temperature threshold and the heat demand component has a heat demand, the heating power is determined to be the first power. The first power is usually 100% gear, that is, the heater is in a state of outputting at maximum power.

[0084] At the temperature T of the first fluid medium 介质1 When the temperature is greater than the third temperature threshold, a second power corresponding to the temperature of the first fluid medium is determined. The second power is an intermediate gear, which can be 80%, 60%, 40% and 20%. The second power is selected according to the adjustment capacity of the heater in the thermostat and is not limited here.

[0085] At the temperature T of the first fluid medium 介质1 When the temperature is less than or equal to the second temperature threshold, the heating power is determined to be the first power.

[0086] In step S403, the first fluid medium is heated with the determined heating power. In step S404, it is determined whether the thermostat valve is opened. When the thermostat valve is not opened, steps S402 to S404 are repeatedly executed until the thermostat valve is opened.

[0087] When the thermostat valve is opened, step S405 is executed, wherein the second fluid medium circulates to the thermostat to perform heat exchange with the first fluid medium.

[0088] In step S406, it is determined whether the temperature of the first fluid medium is greater than the fourth temperature threshold or less than the first temperature threshold. 介质1 When the temperature is less than or equal to the fourth temperature threshold or greater than the first temperature threshold, steps S402 to S406 are repeated until the temperature T of the first fluid medium is monitored. 介质1 is greater than or equal to the fourth temperature threshold, or the temperature T of the first fluid medium 介质1 The temperature is less than or equal to a first temperature threshold and maintained for a first time period.

[0089] At the temperature T of the first fluid medium 介质1 When the temperature is greater than or equal to the fourth temperature threshold, step S407 is executed to adjust the heater of the thermostat from the first power to the non-operating state, so that the heater stops heating to avoid overheating of the valve. 介质1 When the temperature is less than or equal to the first temperature threshold and maintained for the first time period, the heater of the thermostat is adjusted from the second power to the non-operating state to stop heating to avoid ineffective heating.

[0090] After the thermostat fails, the thermostat is controlled to be in a non-operating state to stop heating. After the thermostat failure is resolved, the heating power of the thermostat is re-determined according to the temperature of the first fluid medium. The failure may be a resistance wire failure of the heater, etc.

[0091] In some embodiments, it is necessary to determine whether the heat-demanding component has a heat demand. If the heat-demanding component is a vehicle-mounted battery, it is determined that the vehicle-mounted battery has a heat demand when the vehicle-mounted battery does not issue a cooling request, the maximum temperature of the vehicle-mounted battery is less than the battery temperature threshold, the remaining charge of the vehicle-mounted battery is less than the power threshold, and the ambient temperature of the vehicle-mounted battery is less than the ambient temperature threshold. Alternatively, it is determined that the heat-demanding component has a heat demand when the vehicle-mounted battery is in a boost charging state, there is a frozen blockage and the blockage needs to be melted or softened by heating to clear the blockage, Xu Yongtao releases a signal to the component through heat, etc.

[0092] Figure 8It is a flow chart of a temperature control method according to an embodiment of the present disclosure. Based on the above scheme, the present disclosure proposes a temperature control method M800, including: step S810, obtaining the temperature of a first fluid medium flowing through a vehicle drive system, the first fluid medium being used to absorb the heat released by the vehicle drive system and circulate between the vehicle drive system and the thermostat; step S820, determining the heating power of the thermostat according to the temperature of the first fluid medium; and step S830, based on the heating power, controlling the thermostat to heat the first fluid medium, wherein the first fluid medium is maintained within a target temperature range after being heated by the thermostat, the valve of the thermostat is opened at a target opening within the target temperature range, the second fluid medium flowing through the heat demanding component performs heat exchange with the first fluid medium via the opened valve, and the heat demanding component obtains the heat released by the vehicle drive system through the second fluid medium that performs heat exchange with the first fluid medium.

[0093] The implementation methods and principles of each step of the temperature control method M800 can be referred to above and will not be repeated here.

[0094] The present disclosure also proposes a temperature control system, including a processor and a memory, wherein the memory stores a computer program. When the computer program is executed by the processor, the processor executes the following process: obtaining the temperature of a first fluid medium flowing through a vehicle drive system, wherein the first fluid medium is used to absorb heat released by the vehicle drive system and circulate between the vehicle drive system and a thermostat; determining the heating power of the thermostat according to the temperature of the first fluid medium; and controlling the thermostat to heat the first fluid medium based on the heating power, wherein the first fluid medium is maintained within a target temperature range after being heated by the thermostat, wherein the valve of the thermostat is opened at a target opening within the target temperature range, and the second fluid medium flowing through a heat demanding component exchanges heat with the first fluid medium via the opened valve, and the heat demanding component obtains the heat released by the vehicle drive system through the second fluid medium that exchanges heat with the first fluid medium. Wherein, the temperature control system operates at Figure 1 On the server 100, the processor and the memory are part of the server 100.

[0095] In some embodiments, the processor further performs the following process: when the temperature of the first fluid medium is greater than a first temperature threshold and the heat demanding component has a heat demand, determining the heating power to be a first power.

[0096] In some embodiments, the processor further performs the following process: when the temperature of the first fluid medium is greater than a third temperature threshold, determining a second power corresponding to the temperature of the first fluid medium.

[0097] In some embodiments, the processor further performs the following process: when the temperature of the first fluid medium is less than or equal to a second temperature threshold, determining the heating power to be the first power.

[0098] In some embodiments, the processor further performs the following process: controlling the thermostat to stop heating when the temperature of the first fluid medium is greater than or equal to a fourth temperature threshold, the heat demand component has no heat demand, the flow rate of the first fluid medium is zero, or the temperature of the first fluid medium is less than or equal to the first temperature threshold and maintained for a first time period.

[0099] In some embodiments, the processor further performs the following process: determining a first temperature threshold, a second temperature threshold, a third temperature threshold, and a fourth temperature threshold according to a heating capacity of the thermostat and a material property of the valve.

[0100] Specifically, the thermostat is controlled to a first power, and the lowest temperature of the first fluid medium that makes the valve opening greater than zero is determined as a first temperature threshold, and the lowest temperature of the first fluid medium that makes the valve reach a target opening is determined as a second temperature threshold; and the thermostat is controlled not to heat, and the lowest temperature of the first fluid medium that makes the valve opening greater than zero is determined as a third temperature threshold, and the lowest temperature of the first fluid medium that makes the valve reach the target opening is determined as a fourth temperature threshold.

[0101] Alternatively, the thermostat is controlled to a first power, and the lowest temperature of the first fluid medium that makes the valve opening greater than zero is determined as a first basic temperature, and the lowest temperature of the first fluid medium that makes the valve reach a target opening is determined as a second basic temperature; the thermostat is controlled not to be heated, and the lowest temperature of the first fluid medium that makes the valve opening greater than zero is determined as a third basic temperature, and the lowest temperature of the first fluid medium that makes the valve reach a target opening is determined as a fourth basic temperature; according to the temperature fluctuation amplitude of the first fluid medium, a first hysteresis value, a second hysteresis value, a third hysteresis value and a fourth hysteresis value are superimposed on the first basic temperature, the second basic temperature, the third basic temperature and the fourth basic temperature, respectively, to obtain a first temperature threshold, a second temperature threshold, a third temperature threshold and a fourth temperature threshold.

[0102] In some implementations, the processor further performs the following process: after a failure of the thermostat occurs, controlling the thermostat to stop heating.

[0103] In some implementations, the processor further performs the following process: after the failure of the thermostat is resolved, determining the heating power of the thermostat according to the temperature of the first fluid medium.

[0104] In some embodiments, the processor further performs the following process: determining whether the heat demand component has a heat demand. Specifically, the heat demand component is a vehicle battery, and when the vehicle battery does not issue a cooling request, the maximum temperature of the vehicle battery is less than the battery temperature threshold, the remaining charge of the vehicle battery is less than the charge threshold, and the ambient temperature of the vehicle battery is less than the ambient temperature threshold, it is determined that the vehicle battery has a heat demand.

[0105] In some embodiments, the first fluid medium is cooling oil and the second fluid medium is cooling liquid.

[0106] The implementation methods and principles of each step performed by the temperature control system can be found in the previous text and will not be repeated here.

[0107] The temperature control system can, under the condition that the drive system generates less heat, assist in raising the temperature of the first fluid medium by controlling the heating power of the thermostat, so that the thermostat valve opens early to the target opening, so as to efficiently recover the heat released by the drive system to the heat-demanding components, thereby achieving a balance between vehicle drive efficiency and heat recovery requirements.

[0108] Fig. 9 is a block diagram of a temperature control device according to an embodiment of the present disclosure. Fig. 9 As shown, the temperature control device 9000 includes: A temperature measurement module 910 is used to obtain the temperature of a first fluid medium flowing through a vehicle drive system, the first fluid medium being used to absorb heat released by the vehicle drive system and circulate between the vehicle drive system and a thermostat; a power determination module 920 is used to determine the heating power of the thermostat according to the temperature of the first fluid medium; and a heating control module 930 is used to control the thermostat to heat the first fluid medium based on the heating power, wherein the first fluid medium is maintained within a target temperature range by being heated by the thermostat, within the target temperature range, the valve of the thermostat is opened at a target opening, and a second fluid medium flowing through a heat demanding component exchanges heat with the first fluid medium via the opened valve, and the heat demanding component obtains the heat released by the vehicle drive system through the second fluid medium that exchanges heat with the first fluid medium.

[0109] The temperature control device 9000 also includes a circuit 9100, a processor 9200, a memory 9300 and other circuits 9400. The specific methods and principles of implementation of each module in the corresponding steps executed can be referred to the previous text and will not be repeated here.

[0110] The present disclosure also provides a readable storage medium, in which execution instructions are stored, and when the execution instructions are executed by a processor, they are used to implement the above method. "Readable storage medium" can be any device that can contain, store, communicate, propagate or transmit programs for use in an instruction execution system, device or equipment or in combination with these instruction execution systems, devices or equipment. More specific examples of readable storage media include the following: an electrical connection portion (electronic device) with one or more wirings, a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and editable read-only memory (EPROM or flash memory), an optical fiber device, and a portable read-only memory (CDROM), etc.

[0111] The present disclosure also provides a computer program product, and the method of the present disclosure can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed, the process or function of the present disclosure is executed in whole or in part. A computer-readable storage medium can be used as an implementation of a computer program product, that is, the present disclosure also provides a computer-readable storage medium, which includes a computer program, and when the computer program is executed by a processor, any of the above methods is implemented.

[0112] The computer program or instructions may be stored in a readable storage medium or transmitted from one readable storage medium to another readable storage medium, for example, the computer program or instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. The readable storage medium may be any available medium that can be accessed or a data storage device such as a server, data center, etc. that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; it may also be a semiconductor medium, such as a solid state drive. The computer readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile types of storage media.

[0113] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure 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, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0114] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the 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.

[0115] 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.

[0116] 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.

[0117] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and features of different embodiments / methods or examples, unless they are contradictory.

[0118] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0119] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A temperature control method, characterized in that: include: obtaining a temperature of a first fluid medium flowing through a vehicle drive system, wherein the first fluid medium is used to absorb heat released by the vehicle drive system and circulate between the vehicle drive system and a thermostat; determining a heating power of the thermostat according to the temperature of the first fluid medium; as well as Based on the heating power, the thermostat is controlled to heat the first fluid medium, wherein the first fluid medium is maintained within a target temperature range by being heated by the thermostat. Within the target temperature range, the valve of the thermostat is opened at a target opening degree. The second fluid medium flowing through the heat-demanding component exchanges heat with the first fluid medium via the opened valve. The heat-demanding component obtains heat released by the vehicle drive system through the second fluid medium in heat exchange with the first fluid medium.

2. The temperature control method according to claim 1, characterized in that: Determining the heating power of the thermostat according to the temperature of the first fluid medium includes: When the temperature of the first fluid medium is greater than a first temperature threshold and the heat-demanding component has a heat demand, the heating power is determined to be a first power.

3. The temperature control method according to claim 1, characterized in that: Determining the heating power of the thermostat according to the temperature of the first fluid medium includes: When the temperature of the first fluid medium is greater than a third temperature threshold, a second power corresponding to the temperature of the first fluid medium is determined.

4. The temperature control method according to claim 1, wherein: Determining the heating power of the thermostat according to the temperature of the first fluid medium includes: When the temperature of the first fluid medium is less than or equal to a second temperature threshold, the heating power is determined to be a first power.

5. The temperature control method according to claim 1, wherein: After determining the heating power of the thermostat according to the temperature of the first fluid medium, the method further includes: The thermostat is controlled to stop heating when the temperature of the first fluid medium is greater than or equal to a fourth temperature threshold, the heat-demanding component has no heat demand, the flow rate of the first fluid medium is zero, or the temperature of the first fluid medium is less than or equal to a first temperature threshold and maintains for a first time period.

6. The temperature control method according to claim 1, wherein: Before determining the heating power of the thermostat according to the temperature of the first fluid medium, the method further includes: A first temperature threshold, a second temperature threshold, a third temperature threshold, and a fourth temperature threshold are determined according to the heating capacity of the thermostat and the material properties of the valve.

7. The temperature control method according to claim 6, characterized in that: Determining a first temperature threshold, a second temperature threshold, a third temperature threshold, and a fourth temperature threshold according to a heating capacity of the thermostat and material properties of the valve includes: controlling the thermostat to a first power, determining the lowest temperature of the first fluid medium at which the valve opening is greater than zero as the first temperature threshold, and determining the lowest temperature of the first fluid medium at which the valve reaches a target opening as the second temperature threshold; and The thermostat is controlled not to heat, and the lowest temperature of the first fluid medium that makes the valve opening greater than zero is determined as the third temperature threshold, and the lowest temperature of the first fluid medium that makes the valve reach the target opening is determined as the fourth temperature threshold.

8. The temperature control method according to claim 6, characterized in that: Determining a first temperature threshold, a second temperature threshold, a third temperature threshold, and a fourth temperature threshold according to a heating capacity of the thermostat and material properties of the valve includes: controlling the thermostat to a first power, determining the lowest temperature of the first fluid medium at which the valve opening is greater than zero as a first base temperature, and determining the lowest temperature of the first fluid medium at which the valve reaches a target opening as a second base temperature; controlling the thermostat to not heat, determining the lowest temperature of the first fluid medium at which the valve opening is greater than zero as a third base temperature, and determining the lowest temperature of the first fluid medium at which the valve reaches a target opening as a fourth base temperature; According to the temperature fluctuation amplitude of the first fluid medium, a first hysteresis value, a second hysteresis value, a third hysteresis value, and a fourth hysteresis value are superimposed on the first base temperature, the second base temperature, the third base temperature, and the fourth base temperature, respectively, to obtain the first temperature threshold, the second temperature threshold, the third temperature threshold, and the fourth temperature threshold.

9. The temperature control method according to claim 1, wherein: Also includes: After the thermostat fails, the thermostat is controlled to stop heating.

10. The temperature control method according to claim 9, characterized in that: After controlling the thermostat to stop heating, the method includes: After the failure of the thermostat is resolved, the heating power of the thermostat is determined according to the temperature of the first fluid medium.

11. The temperature control method according to claim 1, wherein: Before determining the heating power of the thermostat according to the temperature of the first fluid medium, the method further includes: Determine if the heat-required component has heat requirements, including: The heat-demanding component is an onboard battery. When the onboard battery does not issue a cooling request, the maximum temperature of the onboard battery is less than a battery temperature threshold, the remaining charge of the onboard battery is less than a power threshold, and the ambient temperature of the onboard battery is less than an ambient temperature threshold, it is determined that the onboard battery has a heat demand.

12. The temperature control method according to claim 11, characterized in that: The first fluid medium is cooling oil, and the second fluid medium is cooling liquid.

13. A temperature control system, characterized in that: The system comprises a processor and a memory, wherein the memory stores a computer program. When the computer program is executed by the processor, the processor performs the following process: obtaining a temperature of a first fluid medium flowing through a vehicle drive system, wherein the first fluid medium is used to absorb heat released by the vehicle drive system and circulate between the vehicle drive system and a thermostat; determining a heating power of the thermostat according to the temperature of the first fluid medium; as well as Based on the heating power, the thermostat is controlled to heat the first fluid medium, wherein the first fluid medium is maintained within a target temperature range by being heated by the thermostat. Within the target temperature range, the valve of the thermostat is opened at a target opening degree. The second fluid medium flowing through the heat-demanding component exchanges heat with the first fluid medium via the opened valve. The heat-demanding component obtains heat released by the vehicle drive system through the second fluid medium in heat exchange with the first fluid medium.

14. A vehicle, characterized in that: The vehicle includes the temperature control system of claim 13 .

15. A computer program product, characterized in that The computer program product comprises a computer program, which is configured to implement at least the method according to any one of claims 1 to 12 when executed by a processor.

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