Temperature control method and device for electric vehicle, electric vehicle and medium

Abstract

The application discloses a temperature control method and device of an electric vehicle, the electric vehicle and a medium. The electric vehicle comprises an engine air intake module, an engine air intake cooling module, an air conditioner air intake module and a three-way valve. The method comprises the following steps: after receiving an air conditioner heating instruction, a current first temperature value of air output by the air conditioner air intake module and a current second temperature value of air entering a fuel cell stack in the engine air intake module are acquired; a current opening value of the third interface is determined according to the current first temperature value, the current second temperature value and a preset temperature value in the air conditioner heating instruction; the third interface is turned on at the current opening value, so that the temperature of the air output by the air conditioner air intake module is adjusted based on the heat transferred into the fuel cell stack after the turning on. The heat exchanged by the engine air intake is introduced into the passenger cabin as a supplement to the current air conditioner and PTC heating, the vehicle energy utilization efficiency is improved, the heating effect and the temperature rising efficiency are improved, and the driving comfort is improved.

Description

Technical Field

[0001] This invention relates to the field of fuel cell engine technology, and more particularly to temperature control methods, devices, electric vehicles, and media for electric vehicles. Background Technology

[0002] With oil resources becoming increasingly scarce and fuel consumption and emission regulations becoming increasingly stringent, reducing fuel consumption and emissions for traditional internal combustion engine-powered vehicles is becoming increasingly costly and challenging. Hydrogen fuel cell engines, on the other hand, are considered the most promising power system of the future. These engines use hydrogen as fuel, which can be produced through water electrolysis. The combustion product of a hydrogen fuel cell engine is water, causing no environmental pollution. Unlike traditional internal combustion engines that use exhaust energy to drive a turbocharger to provide a large amount of air, hydrogen fuel cell engines use an electric turbocharger to provide the sufficient air required for the reaction. Because the air temperature rises significantly after pressurization, and fuel cell engines require the air temperature to be within a suitable range during the air-hydrogen reaction, an intercooler is needed to cool the pressurized air.

[0003] For vehicles powered by fuel cell engines, the heating in the cab mainly comes from heat pump air conditioning and water-based PTC heating. Based on current data for Class A pure electric vehicles, the energy consumption per 100 kilometers is around 14 kWh / 100km when driving in cold urban areas, while the energy consumption of air conditioning is around 7 kWh / 100km. The energy consumption of air conditioning for heating accounts for a very high proportion of the total energy consumption of the vehicle.

[0004] Currently, in fuel cell vehicles, the heat exchanged through the turbocharger and intercooler is often dissipated directly through the radiator at the front of the vehicle, resulting in a significant waste of the vehicle's energy. Summary of the Invention

[0005] This invention provides a temperature control method, device, electric vehicle, and medium for electric vehicles, to achieve temperature control of the passenger compartment based on the heat of a fuel cell vehicle.

[0006] According to a first aspect of the present invention, a temperature control method for an electric vehicle is provided, applied to an electric vehicle, the electric vehicle comprising: an engine intake module, an engine intake cooling module, an air conditioning intake module, and a three-way valve, wherein the engine intake module is connected and conductive to a first interface of the three-way valve, the engine intake cooling module is connected and conductive to a second interface of the three-way valve, and the air conditioning intake module is connected to a third interface of the three-way valve, the method comprising:

[0007] Upon receiving the air conditioning heating command, the system obtains the current first temperature value of the air output from the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack from the engine intake module.

[0008] The current opening value of the third interface is determined based on the current first temperature value, the current second temperature value, and the preset temperature value in the air conditioning heating command.

[0009] The third interface is controlled to be turned on at the current opening value, so as to adjust the temperature of the air output by the air conditioning intake module based on the heat transferred into the fuel cell stack after being turned on.

[0010] According to a second aspect of the present invention, a temperature control device for an electric vehicle is provided, comprising:

[0011] The interface connection module is used to obtain the current first temperature value of the air output by the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack in the engine intake module after receiving the air conditioning heating command.

[0012] The opening value determination module is used to determine the current opening value of the third interface based on the current first temperature value, the current second temperature value, and the preset temperature value in the air conditioning heating command.

[0013] An opening control module is used to control the third interface to be turned on at the current opening value, so as to adjust the temperature of the air output by the air conditioning intake module based on the heat transferred into the fuel cell stack after the interface is turned on.

[0014] According to a third aspect of the present invention, an electric vehicle is provided, the electric vehicle comprising:

[0015] The engine intake module, engine intake cooling module, air conditioning intake module, and three-way valve are provided. The engine intake module is connected to the first interface of the three-way valve, the engine intake cooling module is connected to the second interface of the three-way valve, and the air conditioning intake module is connected to the third interface of the three-way valve.

[0016] Also includes:

[0017] One or more controllers;

[0018] A memory communicatively connected to the at least one controller; wherein,

[0019] The memory stores a computer program that can be executed by the at least one controller, which enables the at least one controller to perform the temperature control method for electric vehicles according to any embodiment of the present invention.

[0020] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the temperature control method for an electric vehicle according to any embodiment of the present invention.

[0021] The technical solution of this invention includes an engine intake module, an engine intake cooling module, an air conditioning intake module, and a three-way valve in an electric vehicle. The engine intake module is connected to and conducts through a first interface of the three-way valve, the engine intake cooling module is connected to and conducts through a second interface of the three-way valve, and the air conditioning intake module is connected to and conducts through a third interface of the three-way valve. The method includes: after receiving an air conditioning heating command, acquiring the current first temperature value of the air output from the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack from the engine intake module; determining the current opening value of the third interface based on the current first temperature value, the current second temperature value, and a preset temperature value in the air conditioning heating command; and controlling the third interface to conduct at the current opening value to adjust the temperature of the air output from the air conditioning intake module based on the heat transferred into the fuel cell stack after conduction. When the vehicle's passenger compartment requires heating, the heat exchanged from the engine's intake air turbocharger intercooler is introduced into the passenger compartment for heating, supplementing the current air conditioning and PTC heating, thus improving the overall vehicle's energy utilization efficiency. At the same time, because more heat is involved in heating the passenger compartment, the heating effect is improved in low-temperature conditions, the passenger compartment heats up more quickly, and driving comfort is improved. Furthermore, when the intake intercooling effect is insufficient due to passenger compartment heating, some of the heat dissipation is achieved through the vehicle's front radiator, ensuring the intercooling requirements of the fuel cell engine's intake air while also improving energy utilization.

[0022] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a flowchart of a temperature control method for an electric vehicle according to Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the composition of an electric vehicle in a temperature control method for an electric vehicle according to Embodiment 1 of the present invention;

[0026] Figure 3 This is a flowchart of a temperature control method for an electric vehicle according to Embodiment 2 of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a temperature control device for an electric vehicle according to Embodiment 3 of the present invention;

[0028] Figure 5 This is a structural schematic diagram of an electric vehicle that implements an embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Example 1

[0032] Figure 1 The flowchart of a temperature control method for an electric vehicle provided in Embodiment 1 of the present invention is applicable to the cabin heating of electric vehicles. The method can be executed by a temperature control device of the electric vehicle, which can be implemented in hardware and / or software. The temperature control device can be configured in the electric vehicle, which includes: an engine intake module, an engine intake cooling module, an air conditioning intake module, and a three-way valve. The engine intake module is connected to and conducts through a first interface of the three-way valve, the engine intake cooling module is connected to and conducts through a second interface of the three-way valve, and the air conditioning intake module is connected to and conducts through a third interface of the three-way valve.

[0033] In this embodiment, the engine intake module is used to provide intake air at a pressure higher than atmospheric pressure to the fuel cell engine. This module may include: a fuel cell intake air filter, a PTC heater, an electric supercharger, a supercharger temperature sensor, a supercharger intercooler heat exchanger, an intercooler temperature sensor, and a fuel cell stack. The engine intake cooling module is used to cool the coolant and the air temperature entering the fuel cell stack that exceeds the upper limit of normal operating temperature. This module may include: a supercharger temperature sensor, a supercharger intercooler heat exchanger, an intercooler temperature sensor, an electric water pump, an expansion tank, a heat exchanger, a front radiator, a fan, and a coolant temperature sensor. The air conditioning intake module is used for air conditioning and heating. This module may include: an air conditioning intake air filter, a heat exchanger, an air conditioning PTC heater, an air conditioning blower, and an air conditioning intake air temperature sensor. A three-way valve can be understood as a valve with three ports. The engine intake module is connected to and conducts through the first port of the three-way valve, the engine intake cooling module is connected to and conducts through the second port of the three-way valve, and the air conditioning intake module is connected to the third port of the three-way valve.

[0034] like Figure 1 As shown, the method includes:

[0035] S110. After receiving the air conditioning heating command, obtain the current first temperature value of the air output by the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack in the engine intake module.

[0036] In this embodiment, the air conditioning heating command can be understood as the command generated when a user in the vehicle's passenger compartment turns on the air conditioning for heating. The current first temperature value can be understood as the temperature value of the air output from the air conditioning intake module to the vehicle's passenger compartment. The current second temperature value can be understood as the temperature value of the air entering the fuel cell stack from the engine intake module.

[0037] Specifically, when a user in the vehicle's passenger compartment turns on the air conditioning for heating, the controller can receive the air conditioning heating command via a bus or other means. After receiving the air conditioning heating command, the controller can collect the temperature of the air output from the air conditioning intake module through a temperature sensor located at the output pipe position in the air conditioning intake module. The controller can obtain the current first temperature value collected by the temperature sensor. The controller can also collect the temperature of the air entering the fuel cell stack through a temperature sensor located in the engine intake module before entering the fuel cell stack. The controller can obtain the current second temperature value collected by the temperature sensor.

[0038] S120. Determine the current opening value of the third interface based on the current first temperature value, the current second temperature value, and the preset temperature value in the air conditioning heating command.

[0039] In this embodiment, the preset temperature value can be understood as the user's desired temperature. The current opening value can be understood as the valve conduction degree of the third interface.

[0040] It is important to know that when the third interface is open, it may affect the temperature at the fuel cell stack intake in the engine intake module. To ensure the normal operation of the fuel cell, the upper limit of the opening of the third interface needs to be determined.

[0041] Specifically, the controller can determine the upper limit of the opening of the third interface based on the current second temperature value at the fuel cell stack and the preset upper limit of the fuel cell temperature. Then, under the premise of ensuring that the current opening value is less than the upper limit, the controller determines the current opening value of the third interface based on the deviation between the current first temperature value and the preset temperature value in the air conditioning heating command, combined with an integral closed-loop algorithm. When the current opening value is equal to the upper limit, that is, when the temperature cannot be further adjusted by the opening of the third interface, the controller combines the power adjustment of the heater in the air conditioning intake module to make the current first temperature value the same as the preset temperature value.

[0042] S130: Control the third interface to be turned on with the current opening value, and adjust the temperature of the air output from the air conditioning intake module based on the heat transferred into the fuel cell stack after the interface is turned on.

[0043] Specifically, the controller can control the third interface to be turned on at the current opening value, and adjust the temperature of the air output from the air conditioning intake module based on the heat transferred into the fuel cell stack after the interface is turned on, so that the temperature of the output air is the same as the set temperature value.

[0044] The technical solution of this invention includes an engine intake module, an engine intake cooling module, an air conditioning intake module, and a three-way valve in an electric vehicle. The engine intake module is connected to and conducts through a first interface of the three-way valve, the engine intake cooling module is connected to and conducts through a second interface of the three-way valve, and the air conditioning intake module is connected to and conducts through a third interface of the three-way valve. The method includes: after receiving an air conditioning heating command, acquiring the current first temperature value of the air output from the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack from the engine intake module; determining the current opening value of the third interface based on the current first temperature value, the current second temperature value, and a preset temperature value in the air conditioning heating command; and controlling the third interface to conduct at the current opening value to adjust the temperature of the air output from the air conditioning intake module based on the heat transferred into the fuel cell stack after conduction. When the vehicle's passenger compartment requires heating, the heat exchanged from the engine's intake air turbocharger intercooler is introduced into the passenger compartment for heating, supplementing the current air conditioning and PTC heating, thus improving the overall vehicle's energy utilization efficiency. At the same time, because more heat is involved in heating the passenger compartment, the heating effect is improved in low-temperature conditions, the passenger compartment heats up more quickly, and driving comfort is improved. Furthermore, when the intake intercooling effect is insufficient due to passenger compartment heating, some of the heat dissipation is achieved through the vehicle's front radiator, ensuring the intercooling requirements of the fuel cell engine's intake air while also improving energy utilization.

[0045] For example, to facilitate understanding of the connection methods, configurations, and control methods among the engine intake module, engine intake cooling module, air conditioning intake module, and three-way valve mentioned in this solution, an exemplary description is provided. Figure 2 This is a schematic diagram of the electric vehicle components in a temperature control method for an electric vehicle according to Embodiment 1 of the present invention, as shown below. Figure 2 As shown, it includes: fuel cell intake air filter 201, PTC heater 202, electric supercharger 203, supercharger temperature sensor 204, supercharger intercooler heat exchanger 205, intercooler temperature sensor 206, fuel cell stack 207, electric water pump 208, expansion tank 209, air conditioning intake air filter 210, heat exchanger 211, air conditioning PTC heater 212, air conditioning blower 213, air conditioning intake air temperature sensor 214, three-way valve 215, front radiator 216, fan 217, and coolant temperature sensor 218.

[0046] The fuel cell intake filter 201, PTC heater 202, electric turbocharger 203, turbocharger temperature sensor 204, turbocharger intercooler heat exchanger 205, intercooler temperature sensor 206, and fuel cell stack 207 together form the engine intake module. The fuel cell intake air filter 201 is used to filter the intake air of the fuel cell engine to ensure the cleanliness of the intake air. When the fuel cell engine has a large demand for intake air, the electric supercharger 203 works to provide the fuel cell engine with intake air at a pressure higher than atmospheric pressure. After the electric supercharger pressurizes the intake air, the intake air temperature will rise. The temperature sensor 204 is used to collect the temperature of the pressurized air. When the temperature of the pressurized air exceeds the upper limit of the temperature set for the operation of the fuel cell stack, the heat exchanger 205 is used to transfer the heat in the pressurized air to the cooling water circuit. In low-temperature environments, when the temperature sensor 204 collects the air temperature after passing through the supercharger 203, which is lower than the lower limit of the normal operating temperature of the fuel cell stack, the PTC heater 202 starts and heats the intake air to ensure that the intake air temperature of the fuel cell engine is higher than the set lower limit of the temperature. The power of the PTC heater 202 is calculated from the set intake air temperature and the actual intake air temperature of the fuel cell engine.

[0047] The engine intake air cooling module consists of a booster temperature sensor 204, a booster intercooler heat exchanger 205, an intercooler temperature sensor 206, an electric water pump 208, an expansion tank 209, a heat exchanger 211, a front radiator 216, a fan 217, and a coolant temperature sensor 218. Temperature sensor 206 detects the temperature of the air entering the fuel cell stack 207 after passing through the heat exchanger 205, obtaining a current second temperature value. If the current second temperature value after passing through the heat exchanger 205 exceeds the set upper limit of the fuel cell intake air temperature for this operating condition, cooling of the intake air after passing through the electric booster 203 is required. If the current second temperature value after passing through the heat exchanger 205 does not exceed the set upper limit of the fuel cell intake air temperature for this operating condition, cooling of the intake air after passing through the electric booster 203 is not required. The cooling water temperature sensor 218 is used to detect the cooling water temperature and calculate the rotational speed of the electric water pump 208 based on the relative relationship between the cooling water temperature and the pressurized air temperature.

[0048] The first port of the three-way valve 215 is connected to the turbocharger intercooler heat exchanger 205 in the engine intake module, the second port of the three-way valve 215 is connected to the front radiator 216 in the engine intake cooling module, and the third port of the three-way valve 215 is connected to the heat exchanger 211 in the air conditioning intake module. When no air conditioning heating command is received, the three-way valve 215 opens the first and second ports, and the cooling water flows through the electric water pump 208, the turbocharger intercooler heat exchanger 205, and the radiator 216. The heat of the pressurized air is absorbed by the cooling water through the heat exchanger 205 and then dissipated into the air in the front radiator 216. The function of the fan 217 is to increase the heat dissipation capacity of the front radiator 216. When there is an air conditioning heating command in the passenger compartment, the three-way valve 215 opens the first, second, and third ports, and part of the cooling water flows through the front radiator 216 and part of the cooling water flows through the heat exchanger 211.

[0049] The air conditioning intake module consists of an air intake filter 210, a heat exchanger 211, an air conditioning PTC heater 212, an air conditioning blower 213, and an air conditioning intake temperature sensor 214. The filter 210 filters the air to ensure its cleanliness before it enters the air conditioning system. The heat exchanger 211 transfers heat from the pressurized air in the fuel cell stack. The PTC heater 212 heats the air entering the passenger compartment to ensure it meets heating requirements. The blower 213 supplies air to the passenger compartment. The temperature sensor 214 collects the temperature of the air entering the passenger compartment (the current initial temperature value) and compares it with the set temperature. An algorithm is used to adjust the opening of the three-way valve 215 and the power of the PTC heater 212 to ensure the actual air temperature meets the heating requirements of the passenger compartment.

[0050] As a first optional embodiment of this embodiment, further optimizations can be made based on the above embodiments, including:

[0051] When the duty cycle of the three-way valve is zero, the engine intake module is connected to the first interface of the three-way valve and is conductive, the engine intake cooling module is connected to the second interface of the three-way valve and is not conductive, and the air conditioning intake module is connected to the third interface of the three-way valve and is conductive.

[0052] In this embodiment, the duty cycle can be understood as a ratio representing the valve opening degree.

[0053] Specifically, when the duty cycle of the three-way valve is zero, that is, when the valve opening is zero, the controller can control the engine intake module to connect to the first interface of the three-way valve and conduct, the engine intake cooling module to connect to the second interface of the three-way valve and not conduct, and the air conditioning intake module to connect to the third interface of the three-way valve and conduct.

[0054] In the first optional embodiment of this embodiment, the opening of the three-way valve is improved by adjusting the conduction of each interface when the duty cycle of the three-way valve is zero, thereby realizing the automatic adjustment of the three-way valve.

[0055] Example 2

[0056] Figure 3 This is a flowchart of a temperature control method for an electric vehicle provided in Embodiment 2 of the present invention. This embodiment is a further refinement based on the above embodiments. Figure 3 As shown, the method includes:

[0057] S310. After receiving the air conditioning heating command, obtain the current first temperature value of the air output by the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack in the engine intake module.

[0058] S320. Determine the current upper limit of the opening of the three-way valve based on the current second temperature value and the preset upper limit of the battery temperature.

[0059] In this embodiment, the upper limit of battery temperature can be understood as the upper limit of the intake air temperature to ensure normal operation of the fuel cell stack. The current opening limit can be understood as the maximum conduction level of the third interface.

[0060] Specifically, the controller can determine the current upper limit of the three-way valve's opening based on the current second temperature value and the preset upper limit of the battery temperature, combined with an integral closed-loop algorithm.

[0061] Furthermore, based on the above embodiments, the step of determining the current upper limit of the opening of the three-way valve according to the current second temperature value and the preset upper limit of the battery temperature can be further optimized as follows:

[0062] a1. If the current second temperature value is greater than the upper limit of the battery temperature, then the current opening limit value is determined by combining the first difference between the upper limit of the battery temperature and the second temperature value with the integral closed-loop algorithm.

[0063] Specifically, the controller can compare the current second temperature value with the upper limit of the battery temperature. If the current second temperature value is greater than the upper limit of the battery temperature, the first difference between the upper limit of the battery temperature and the second temperature value is used as the input of the integral closed-loop algorithm. The current upper limit of the opening is obtained based on the output of the integral closed-loop algorithm, and the upper limit of the opening is reduced.

[0064] b1. If the current second temperature value is less than the second difference between the upper limit of battery temperature and the preset temperature deviation value, then the current opening limit value is determined by combining the third difference between the second difference and the current second temperature value with the integral closed-loop algorithm.

[0065] In this embodiment, the temperature deviation value can be understood as a deviation value set to adjust for error conditions.

[0066] Specifically, the controller can obtain a preset temperature deviation value from the corresponding storage medium, calculate the difference between the upper limit of battery temperature and the preset temperature deviation value to obtain a second difference value. If the current second temperature value is less than the second difference value, the controller can use the third difference value between the second difference value and the current second temperature value as the input of the integral closed-loop algorithm, obtain the current opening limit value based on the output of the integral closed-loop algorithm, and increase the opening limit value.

[0067] c1. If the current second temperature value is greater than or equal to the second difference value and less than or equal to the upper limit value of the battery temperature, then the historical upper limit value of the opening at the previous moment shall be used as the current upper limit value of the opening.

[0068] In this embodiment, the historical opening limit value can be understood as the opening limit value at the previous moment.

[0069] Specifically, if the current second temperature value is greater than or equal to the second difference and less than or equal to the upper limit of the battery temperature, that is, when the current second temperature value is between the second difference and the upper limit of the battery temperature, the controller can obtain the upper limit of the historical opening value at the previous moment and use the historical upper limit of the opening value as the current upper limit of the opening value, while ensuring that the historical upper limit of the opening remains unchanged.

[0070] S330, Determine the temperature deviation between the current first temperature value and the preset temperature value in the air conditioning heating command.

[0071] In this embodiment, the temperature deviation value can be understood as reflecting the deviation between the air output by the air conditioning intake module and the preset temperature value.

[0072] Specifically, the controller can calculate the difference between the current first temperature value and the preset temperature value in the air conditioning heating command to obtain the temperature deviation value.

[0073] S340. Determine the current opening value of the third interface based on the temperature deviation value, the preset temperature value, and the current opening limit value.

[0074] Specifically, the controller can input the temperature deviation value into the integral closed-loop algorithm, compare the output result with the current opening limit value, and take the output result as the current opening value when the current opening limit value has not been reached. If the current opening limit value has been reached but cooling is still required, the power of the heater in the air conditioning intake module is reduced first until the power is reduced to zero. Then, the current opening value of the third interface is determined based on the temperature deviation value and the integral closed-loop algorithm.

[0075] Furthermore, based on the above embodiments, the step of determining the current opening value of the third interface according to the temperature deviation value, the preset temperature value, and the current opening limit value can be further optimized as follows:

[0076] a2. Obtain the historical opening value of the third interface at the previous moment.

[0077] Specifically, the controller can retrieve the historical opening value of the third interface recorded at the previous moment from the corresponding storage medium.

[0078] b2. When the historical opening value is not equal to the current upper limit of the opening value, the intermediate opening value of the third interface is determined based on the temperature deviation value and the integral closed-loop algorithm.

[0079] In this embodiment, the intermediate opening value can be understood as the opening value obtained through calculation.

[0080] Specifically, the controller can compare the historical opening value with the current upper limit of the opening value. When the historical opening value is not equal to the current upper limit of the opening value, that is, when the historical opening value is less than the current upper limit of the opening value, the controller can use the temperature deviation value as the input of the integral closed-loop algorithm to determine the intermediate opening value of the third interface.

[0081] For example, when the temperature deviation value is positive, that is, when the current first temperature value is greater than the preset temperature value, the temperature deviation value is input into the integral closed-loop algorithm to reduce the opening degree and obtain an intermediate opening degree value; when the temperature deviation value is negative, that is, when the current first temperature value is less than the preset temperature value, the temperature deviation value is input into the integral closed-loop algorithm to increase the opening degree and obtain an intermediate opening degree value.

[0082] c2. If the intermediate opening value is greater than or equal to the current upper limit opening value, the current upper limit opening value will be used as the current opening value.

[0083] Specifically, in order to ensure that the intermediate opening value does not exceed the current opening limit value, the controller can compare the intermediate opening value with the current opening limit value. If the intermediate opening value is greater than or equal to the current opening limit value, the current opening limit value is used as the current opening value.

[0084] d2. Otherwise, use the intermediate opening value as the current opening value.

[0085] Specifically, in order to ensure that the intermediate opening value does not exceed the current opening limit value, the controller can compare the intermediate opening value with the current opening limit value. If the intermediate opening value is less than the current opening limit value, the intermediate opening value is used as the current opening value.

[0086] d2. When the historical opening value is equal to the current opening limit value, if the power of the heater in the air conditioning intake module is zero and the current first temperature value is greater than the sum of the preset temperature value and the preset temperature deviation limit value, then the current opening value of the third interface is determined based on the temperature deviation value combined with the integral closed-loop algorithm.

[0087] In this embodiment, the heater can be understood as a device used to heat the air intake of the air conditioner, such as a PTC heater. The upper limit of temperature deviation can be understood as an upper limit set to adjust the temperature deviation.

[0088] Specifically, when the historical opening value is equal to the current opening limit value, if the power of the heater in the air conditioning intake module is zero and the current first temperature value is greater than the sum of the preset temperature value and the preset temperature deviation limit value, that is, when the heater is not turned on for heating and the current first temperature value is greater than the sum of the preset temperature value and the preset temperature deviation limit value, the controller can input the temperature deviation value into the integral closed-loop algorithm to determine the current opening value of the third interface, so as to reduce the opening of the third interface.

[0089] S350: Control the third interface to be turned on with the current opening value, and adjust the temperature of the air output from the air conditioning intake module based on the heat transferred into the fuel cell stack after the interface is turned on.

[0090] Specifically, the controller can control the opening degree of the third interface through a bus or other means to conduct the current opening value. Based on the heat transferred into the fuel cell stack after conduction, the heat is transferred to the air conditioning intake module through the third interface to adjust the temperature of the air output by the air conditioning intake module.

[0091] Furthermore, after obtaining the historical opening value of the third interface at the previous moment, it may also include:

[0092] When the historical opening value equals the current opening limit value, the power of the heater in the air conditioning intake module is adjusted according to the current first temperature value, the preset upper limit value of temperature deviation, and the lower limit value of temperature deviation.

[0093] In this embodiment, the lower limit of temperature deviation can be understood as a lower limit set for adjusting the temperature deviation.

[0094] Specifically, when the historical opening value is equal to the current opening upper limit value, the controller can adjust the set temperature value according to the preset upper and lower temperature deviation values, and then compare the adjusted set temperature value with the current first temperature value. Based on the comparison, the power of the heater in the air conditioning intake module is adjusted.

[0095] The step of adjusting the power of the heater in the air conditioning intake module based on the current first temperature value, the preset upper limit of temperature deviation, and the lower limit of temperature deviation may include:

[0096] a3. If the current first temperature value is less than the fourth difference between the set temperature value and the lower limit of the temperature deviation, then increase the power of the heater in the air conditioning intake module according to the set power meter.

[0097] In this embodiment, the power meter can be understood as a table that establishes a pre-defined relationship between the difference and the power.

[0098] Specifically, the controller first calculates the difference between the set temperature value and the lower limit of temperature deviation to obtain the fourth difference value. Then, it compares the current first temperature value with the fourth difference value. If the current first temperature value is less than the fourth difference value, that is, the temperature of the air outlet of the air conditioning intake module is still less than the set temperature input by the user and the temperature needs to be increased, the controller can obtain the pre-set power table from the corresponding storage medium and look up the fourth difference value in the power table to determine the power corresponding to the fourth difference value, thereby increasing the power of the heater in the air conditioning intake module.

[0099] b3. If the current first temperature value is greater than the sum of the set temperature value and the upper limit of the temperature deviation, then reduce the power of the heater according to the power meter.

[0100] Specifically, the controller first adds the set temperature value to the upper limit of the temperature deviation, and then compares the current first temperature value with the sum of the two. If the current first temperature value is greater than the sum of the set temperature value and the upper limit of the temperature deviation, that is, the temperature of the air outlet of the air conditioning intake module is still greater than the set temperature input by the user and the temperature needs to be reduced, the controller can obtain the pre-set power table from the corresponding storage medium, and search for the sum of the set temperature value and the upper limit of the temperature deviation in the power table, thereby determining the power corresponding to the sum of the set temperature value and the upper limit of the temperature deviation, and reducing the power of the heater in the air conditioning intake module.

[0101] The technical solution of this invention, when the vehicle's passenger compartment requires heating, determines the current upper limit of the three-way valve's opening based on the current second temperature value and the upper limit of the battery temperature during fuel cell stack reaction. This ensures the intercooling heat dissipation requirements of the fuel cell engine's intake air. By determining and adjusting the opening value of the three-way valve and the power of the heater using the current first temperature value, the set temperature value, and the current upper limit of the opening, the intake air temperature can be consistent with the set temperature. This achieves automated adjustment of the three-way valve's opening, introducing the heat exchanged from the engine's intake air turbocharger intercooler into the passenger compartment for heating, supplementing the current air conditioning and PTC heating, thus improving the overall vehicle's energy utilization efficiency. Furthermore, because more heat participates in the passenger compartment's heating, the heating effect is improved in low-temperature conditions, the passenger compartment heats up more rapidly, and driving comfort is enhanced. Additionally, when the intake intercooling effect is insufficient due to passenger compartment heating, partial heat dissipation is achieved using the vehicle's front-end radiator, ensuring both the fuel cell engine's intake intercooling heat dissipation requirements and improving energy utilization.

[0102] Example 3

[0103] Figure 4 This is a schematic diagram of the structure of a temperature control device for an electric vehicle provided in Embodiment 3 of the present invention. Figure 4 As shown, the device includes: an interface connection module 41, an opening value determination module 42, and an opening control module 43.

[0104] Among them, the interface connection module 41 is used to obtain the current first temperature value of the air output by the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack in the engine intake module after receiving the air conditioning heating command.

[0105] The opening value determination module 42 is used to determine the current opening value of the third interface based on the current first temperature value, the current second temperature value and the preset temperature value in the air conditioning heating command;

[0106] The opening control module 43 is used to control the third interface to be turned on at the current opening value, so as to adjust the temperature of the air output by the air conditioning intake module based on the heat transmitted into the fuel cell stack after the interface is turned on.

[0107] The technical solution of this invention includes an engine intake module, an engine intake cooling module, an air conditioning intake module, and a three-way valve in an electric vehicle. The engine intake module is connected to and conducts through a first interface of the three-way valve, the engine intake cooling module is connected to and conducts through a second interface of the three-way valve, and the air conditioning intake module is connected to and conducts through a third interface of the three-way valve. The method includes: after receiving an air conditioning heating command, acquiring the current first temperature value of the air output from the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack from the engine intake module; determining the current opening value of the third interface based on the current first temperature value, the current second temperature value, and a preset temperature value in the air conditioning heating command; and controlling the third interface to conduct at the current opening value to adjust the temperature of the air output from the air conditioning intake module based on the heat transferred into the fuel cell stack after conduction. When the vehicle's passenger compartment requires heating, the heat exchanged from the engine's intake air turbocharger intercooler is introduced into the passenger compartment for heating, supplementing the current air conditioning and PTC heating, thus improving the overall vehicle's energy utilization efficiency. At the same time, because more heat is involved in heating the passenger compartment, the heating effect is improved in low-temperature conditions, the passenger compartment heats up more quickly, and driving comfort is improved. Furthermore, when the intake intercooling effect is insufficient due to passenger compartment heating, some of the heat dissipation is achieved through the vehicle's front radiator, ensuring the intercooling requirements of the fuel cell engine's intake air while also improving energy utilization.

[0108] Furthermore, the opening value determination module 42 includes:

[0109] The upper limit value determination unit is used to determine the current upper limit value of the opening of the three-way valve based on the current second temperature value and the preset upper limit value of the battery temperature;

[0110] The deviation value determination unit is used to determine the temperature deviation value between the current first temperature value and the preset temperature value in the air conditioning heating command.

[0111] The opening value determination unit is used to determine the current opening value of the third interface based on the temperature deviation value, the preset temperature value, and the current opening upper limit value.

[0112] Specifically, the upper limit value determination unit is used for:

[0113] If the current second temperature value is greater than the upper limit of the battery temperature, then the current opening limit value is determined by combining the first difference between the upper limit of the battery temperature and the second temperature value with an integral closed-loop algorithm.

[0114] If the current second temperature value is less than the second difference between the upper limit of battery temperature and the preset temperature deviation value, then the current opening limit value is determined by combining the third difference between the second difference and the current second temperature value with an integral closed-loop algorithm.

[0115] If the current second temperature value is greater than or equal to the second difference and less than or equal to the upper limit of battery temperature, then the historical upper limit of opening at the previous moment is used as the current upper limit of opening.

[0116] Specifically, the opening value determination unit is used for:

[0117] Obtain the historical opening value of the third interface at the previous moment;

[0118] When the historical opening value is not equal to the current opening upper limit value, the intermediate opening value of the third interface is determined based on the temperature deviation value and the integral closed-loop algorithm.

[0119] If the intermediate opening value is greater than or equal to the current upper opening value, the current upper opening value is used as the current opening value; otherwise, the intermediate opening value is used as the current opening value.

[0120] When the historical opening value is equal to the current opening limit value, if the power of the heater in the air conditioning intake module is zero and the current first temperature value is greater than the sum of the preset temperature value and the preset temperature deviation limit value, then the current opening value of the third interface is determined based on the temperature deviation value combined with the integral closed-loop algorithm.

[0121] Optionally, the device further includes:

[0122] The power determination module is used to adjust the power of the heater in the air conditioning intake module according to the current first temperature value, the preset upper limit value of temperature deviation, and the lower limit value of temperature deviation after obtaining the historical opening value of the third interface at the previous moment, when the historical opening value is equal to the current upper limit value of opening.

[0123] Furthermore, the power determination module is specifically used for:

[0124] If the current first temperature value is less than the fourth difference between the set temperature value and the lower limit of the temperature deviation, then the power of the heater in the air conditioning intake module is increased according to the set power meter.

[0125] If the current first temperature value is greater than the sum of the set temperature value and the upper limit of the temperature deviation, then the power of the heater is reduced according to the power meter.

[0126] Optionally, the device further includes:

[0127] The interface switching module is used to connect and conduct the engine intake module to the first interface of the three-way valve when the duty cycle of the three-way valve is zero, connect and not conduct the engine intake cooling module to the second interface of the three-way valve, and connect and conduct the air conditioning intake module to the third interface of the three-way valve.

[0128] The electric vehicle temperature control device provided in the embodiments of the present invention can execute the electric vehicle temperature control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0129] Example 4

[0130] Figure 5 This is a structural schematic diagram of an electric vehicle provided in Embodiment 4 of the present invention, as shown below. Figure 5 As shown, the electric vehicle includes a controller 51, a memory 52, an input device 53, an output device 54, an engine intake module 55, an engine intake cooling module 56, an air conditioning intake module 57, and a three-way valve 58. The number of controllers 51 and memory 52 can be one or more; for example, one controller 51 and one memory 52 are used. The controllers 51 and memory 52 in the vehicle can be connected via a bus or other means. Figure 5 Taking a bus connection as an example, the controller refers to the controller of the execution entity in this embodiment of the invention.

[0131] The memory 52, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the temperature control method for electric vehicles in this embodiment of the invention (e.g., the interface connection module 41, the opening value determination module 42, and the opening control module 43 in the temperature control device of the electric vehicle). The controller 51 executes various functional applications and data processing of the vehicle by running the software programs, instructions, and modules stored in the memory 52, thereby realizing the above-described temperature control method for electric vehicles.

[0132] The memory 52 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on terminal usage. Furthermore, the memory 52 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory 52 may further include memory remotely configured relative to the controller 51, which can be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0133] The input device 53 can be used to receive digital or character information and generate key signal inputs related to vehicle user settings and function control.

[0134] The output device 54 may include a display device.

[0135] Example 5

[0136] Embodiment 5 of the present invention also provides a storage medium containing computer-executable instructions, which, when executed by a computer controller, are used for a temperature control method for an electric vehicle. The electric vehicle includes: an engine intake module, an engine intake cooling module, an air conditioning intake module, and a three-way valve. The engine intake module is connected to and conductively connected to a first interface of the three-way valve; the engine intake cooling module is connected to and conductively connected to a second interface of the three-way valve; and the air conditioning intake module is connected to a third interface of the three-way valve. The method includes:

[0137] Upon receiving the air conditioning heating command, the system obtains the current first temperature value of the air output from the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack from the engine intake module.

[0138] The current opening value of the third interface is determined based on the current first temperature value, the current second temperature value, and the preset temperature value in the air conditioning heating command.

[0139] The third interface is controlled to be turned on at the current opening value, so as to adjust the temperature of the air output by the air conditioning intake module based on the heat transferred into the fuel cell stack after being turned on.

[0140] Of course, the computer-executable instructions provided in the embodiments of the present invention are not limited to the method operations described above, but can also perform related operations in the temperature control method for electric vehicles provided in any embodiment of the present invention.

[0141] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0142] It is worth noting that in the above embodiments of the temperature control device for electric vehicles, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0143] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0144] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A temperature control method for an electric vehicle, characterized in that, The method is applied to electric vehicles, the electric vehicles including: an engine intake module, an engine intake cooling module, an air conditioning intake module, and a three-way valve. The engine intake module is connected to and conductively connected to a first interface of the three-way valve, the engine intake cooling module is connected to and conductively connected to a second interface of the three-way valve, and the air conditioning intake module is connected to a third interface of the three-way valve. The method includes: Upon receiving the air conditioning heating command, the system obtains the current first temperature value of the air output from the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack from the engine intake module. The current opening value of the third interface is determined based on the current first temperature value, the current second temperature value, and the preset temperature value in the air conditioning heating command. The third interface is controlled to be turned on at the current opening value, so as to adjust the temperature of the air output by the air conditioning intake module based on the heat transferred into the fuel cell stack after being turned on.

2. The method according to claim 1, characterized in that, Determining the current opening value of the third interface based on the current first temperature value, the current second temperature value, and the preset temperature value in the air conditioning heating command includes: Based on the current second temperature value and the preset upper limit value of battery temperature, determine the current upper limit value of the opening of the three-way valve; Determine the temperature deviation between the current first temperature value and the preset temperature value in the air conditioning heating command; The current opening value of the third interface is determined based on the temperature deviation value, the preset temperature value, and the current opening limit value.

3. The method according to claim 2, characterized in that, The step of determining the current upper limit of the opening of the three-way valve based on the current second temperature value and the preset upper limit of the battery temperature includes: If the current second temperature value is greater than the upper limit of the battery temperature, then the current opening limit value is determined by combining the first difference between the upper limit of the battery temperature and the second temperature value with an integral closed-loop algorithm. If the current second temperature value is less than the second difference between the upper limit of battery temperature and the preset temperature deviation value, then the current opening limit value is determined by combining the third difference between the second difference and the current second temperature value with an integral closed-loop algorithm. If the current second temperature value is greater than or equal to the second difference and less than or equal to the upper limit of battery temperature, then the historical upper limit of opening at the previous moment is used as the current upper limit of opening.

4. The method according to claim 2, characterized in that, Determining the current opening value of the third interface based on the temperature deviation value, the preset temperature value, and the current opening limit value includes: Obtain the historical opening value of the third interface at the previous moment; When the historical opening value is not equal to the current opening upper limit value, the intermediate opening value of the third interface is determined based on the temperature deviation value and the integral closed-loop algorithm. If the intermediate opening value is greater than or equal to the current upper opening value, the current upper opening value is used as the current opening value; otherwise, the intermediate opening value is used as the current opening value. When the historical opening value is equal to the current opening limit value, if the power of the heater in the air conditioning intake module is zero and the current first temperature value is greater than the sum of the preset temperature value and the preset temperature deviation limit value, then the current opening value of the third interface is determined based on the temperature deviation value combined with the integral closed-loop algorithm.

5. The method according to claim 4, characterized in that, After obtaining the historical opening value of the third interface from the previous moment, the following steps are also included: When the historical opening value is equal to the current opening upper limit value, the power of the heater in the air conditioning intake module is adjusted according to the current first temperature value, the preset temperature deviation upper limit value and the temperature deviation lower limit value.

6. The method according to claim 5, characterized in that, The step of adjusting the power of the heater in the air conditioning intake module based on the current first temperature value, a preset upper limit for temperature deviation, and a lower limit for temperature deviation includes: If the current first temperature value is less than the fourth difference between the set temperature value and the lower limit of the temperature deviation, then the power of the heater in the air conditioning intake module is increased according to the set power meter. If the current first temperature value is greater than the sum of the set temperature value and the upper limit of the temperature deviation, then the power of the heater is reduced according to the power meter.

7. The method according to claim 1, characterized in that, Also includes: When the duty cycle of the three-way valve is zero, the engine intake module is connected to and conducts through the first interface of the three-way valve, the engine intake cooling module is connected to and does not conduct through the second interface of the three-way valve, and the air conditioning intake module is connected to and conducts through the third interface of the three-way valve.

8. A temperature control device for an electric vehicle, characterized in that, The apparatus is used to perform a temperature control method for an electric vehicle according to any one of claims 1-7, the apparatus comprising: The interface connection module is used to obtain the current first temperature value of the air output by the air conditioning intake module and the current second temperature value of the air entering the fuel cell stack in the engine intake module after receiving the air conditioning heating command. The opening value determination module is used to determine the current opening value of the third interface based on the current first temperature value, the current second temperature value, and the preset temperature value in the air conditioning heating command. An opening control module is used to control the third interface to be turned on at the current opening value, so as to adjust the temperature of the air output by the air conditioning intake module based on the heat transferred into the fuel cell stack after the interface is turned on.

9. An electric vehicle, characterized in that, include: The engine intake module, engine intake cooling module, air conditioning intake module, and three-way valve are provided. The engine intake module is connected to the first interface of the three-way valve, the engine intake cooling module is connected to the second interface of the three-way valve, and the air conditioning intake module is connected to the third interface of the three-way valve. Also includes: One or more controllers; A memory communicatively connected to the at least one controller; wherein, The memory stores a computer program that can be executed by the at least one controller to enable the at least one controller to perform the methods of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause the controller to execute a temperature control method for an electric vehicle according to any one of claims 1-7.

Images