Temperature control method, device, electronic device and storage medium

Abstract

The present invention discloses a temperature control method, device, electronic device and storage medium. The method comprises: when it is detected that the temperature control data of the target vehicle at the current moment meets the preset temperature control condition, determining the battery temperature in the temperature control data; determining the rotation duty ratio corresponding to the electric water pump in the target vehicle and the temperature control mode corresponding to the temperature control device based on the battery temperature; when the electric water pump is controlled to control the coolant flow based on the rotation duty ratio, the temperature control device is controlled to adjust the coolant temperature based on the temperature control mode, so that the temperature of the battery in the target vehicle is controlled by adjusting the coolant temperature. The problem of poor battery temperature control effect and low efficiency caused by controlling the fan operation to cool the battery in the prior art is solved, and the convenience of temperature control is improved while improving the battery temperature control effect and efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a temperature control method, device, electronic equipment and storage medium. Background Art

[0002] With the development of new energy electric vehicles, electric vehicles are increasingly accepted by the public. However, electric vehicles are different from fuel vehicles. Electric vehicles rely on batteries to run normally, but the function of batteries is usually affected by temperature. When the temperature is too low or too high, the battery power output will be limited, thereby affecting the vehicle's driving function. Therefore, it is necessary to adjust the battery temperature in a timely manner to control the battery temperature within a reasonable temperature range and improve the vehicle's driving function.

[0003] At present, the battery temperature is usually regulated by wrapping the battery with a heat-dissipating box to ensure the heat dissipation effect of the battery, or by controlling the operation of a fan to cool the battery. This regulation method has poor controllability and has the problem of reducing the effect and efficiency of battery heating and cooling. Summary of the invention

[0004] The present invention provides a temperature control method, device, electronic device and storage medium, so as to improve the convenience of temperature control while achieving the technical effect of improving the temperature control effect and efficiency of the battery.

[0005] According to one aspect of the present invention, a temperature control method is provided, the method comprising:

[0006] When it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment condition, determining the battery temperature in the temperature adjustment data;

[0007] Determining a rotation duty ratio corresponding to an electric water pump in the target vehicle and a temperature control mode corresponding to a temperature control device based on the battery temperature, wherein the temperature control device includes a refrigeration device or a heating device;

[0008] When the electric water pump is controlled to adjust the coolant flow rate based on the rotation duty cycle, the temperature control device is controlled to adjust the coolant temperature based on the temperature control method, so that the temperature of the battery in the target vehicle is regulated by adjusting the coolant temperature.

[0009] According to another aspect of the present invention, there is provided a temperature control device, the device comprising:

[0010] A battery temperature determination module, configured to determine the battery temperature in the temperature adjustment data when detecting that the temperature adjustment data of the target vehicle at the current moment meets a preset temperature adjustment condition;

[0011] a temperature control mode determination module, configured to determine a rotation duty ratio corresponding to an electric water pump in the target vehicle and a temperature control mode corresponding to a temperature control device based on the battery temperature, wherein the temperature control device includes a refrigeration device or a heating device;

[0012] The temperature regulating module is used to control the temperature regulating device to adjust the coolant temperature based on the temperature regulating method when controlling the electric water pump to regulate the coolant flow based on the rotation duty cycle, so that the temperature of the battery in the target vehicle can be regulated by regulating the coolant temperature.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] at least one processor; and

[0015] a memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the temperature control method described in any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the temperature control method described in any embodiment of the present invention when executed.

[0018] The technical solution of the embodiment of the present invention is to determine the battery temperature in the temperature adjustment data when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment conditions; determine the rotation duty cycle corresponding to the electric water pump in the target vehicle and the temperature adjustment mode corresponding to the refrigeration device or the heating device based on the battery temperature; when the electric water pump is controlled to adjust the coolant flow based on the rotation duty cycle, the temperature adjustment device is controlled to adjust the coolant temperature based on the temperature adjustment mode, so that the temperature of the battery in the target vehicle is regulated by adjusting the coolant temperature, which solves the problem of poor battery temperature adjustment effect and low efficiency caused by controlling the fan operation to cool the battery in the prior art, and realizes that the rotation duty cycle corresponding to the electric water pump in the target vehicle is determined based on the battery temperature; when the electric water pump is controlled to adjust the coolant flow based on the rotation duty cycle, the refrigeration device or the heating device is controlled to adjust the coolant temperature based on the corresponding temperature adjustment mode, so that the temperature of the battery is regulated by adjusting the coolant temperature, thereby improving the convenience of temperature adjustment and achieving the technical effect of improving the battery temperature adjustment effect and efficiency.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a flow chart of a temperature control method provided according to Embodiment 1 of the present invention;

[0022] Figure 2 is a battery thermal management control framework diagram provided according to the second embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of a temperature control method provided according to Embodiment 2 of the present invention;

[0024] Figure 4 is a structural schematic diagram of a temperature control device provided according to Embodiment 3 of the present invention;

[0025] Figure 5 It is a structural schematic diagram of an electronic device for implementing the temperature control method of an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] Embodiment 1

[0029] Figure 1 1 is a flow chart of a temperature control method provided according to the first embodiment of the present invention. This embodiment is applicable to the case of controlling the temperature of a battery. The method can be executed by a temperature control device. The temperature control device can be implemented in the form of hardware and / or software. The temperature control device can be configured in a computing device. Figure 1 As shown, the method includes:

[0030] S110. When it is detected that the temperature adjustment data of the target vehicle at the current moment meets a preset temperature adjustment condition, determine the battery temperature in the temperature adjustment data.

[0031] It should be noted that the present technical solution can be applied to situations where the battery temperature needs to be regulated in the field of electric vehicles, and can also be applied to any situation where the battery temperature needs to be regulated. It should also be noted that a corresponding battery temperature control system can be developed based on the present technical solution, and then the corresponding tasks can be processed based on the system to regulate the battery temperature. Exemplarily, in the field of electric vehicles, some current data corresponding to the target vehicle can be monitored, such as battery temperature, external ambient temperature, battery water inlet coolant temperature, etc., and based on these data, it can be determined whether the vehicle battery currently needs to be temperature-regulated. If so, the battery temperature is adjusted using a temperature control method to ensure that the battery is within a reasonable operating temperature and improve the performance of the entire vehicle.

[0032] The target vehicle may be an electric vehicle. The temperature adjustment data may include, but are not limited to, battery temperature, external environment temperature, battery water inlet coolant temperature, etc. The preset temperature adjustment conditions may include parameter data corresponding to the temperature adjustment data, such as the maximum temperature limit of the battery or the maximum temperature limit of the external environment. The battery temperature may be understood as the temperature of the battery deployed in the target vehicle.

[0033] In actual applications, the temperature adjustment data corresponding to the target vehicle at the current moment can be compared with the data of the same indicator item in the preset temperature adjustment conditions. For example, when the current external environment temperature is greater than the maximum temperature limit of the external environment, it is considered that the battery has a temperature adjustment requirement, that is, the temperature adjustment data meets the preset temperature adjustment conditions. At this time, the battery temperature in the temperature adjustment data can be retrieved to determine the temperature adjustment method based on the battery temperature.

[0034] In specific applications, depending on the vehicle environment, the battery may have cooling requirements or heating requirements. Accordingly, the preset temperature adjustment conditions corresponding to the two requirements are also different. The preset temperature adjustment conditions may include cooling adjustment conditions and heating adjustment conditions. When the temperature adjustment data meets the cooling adjustment conditions, it is considered that the battery has cooling requirements to determine the temperature adjustment method that can help the battery cool down; when the temperature adjustment data meets the heating adjustment conditions, it is considered that the battery has heating requirements to determine the temperature adjustment method that can help the battery heat up.

[0035] It should be noted that if the preset temperature adjustment condition is a cooling adjustment condition, the data to be compared may be different, and the temperature adjustment data may be compared with the preset index item data in the cooling adjustment condition to determine whether the temperature adjustment data meets the cooling adjustment condition. Optionally, the preset temperature adjustment condition is a cooling adjustment condition, and when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment condition, the battery temperature in the temperature adjustment data is determined, including: obtaining the temperature adjustment data of the target vehicle at the current moment; comparing the temperature adjustment data with the preset cooling reference data to determine the cooling comparison result; if the cooling comparison result is a high battery temperature, the temperature adjustment data meets the cooling adjustment condition, and the battery temperature in the temperature adjustment data is determined.

[0036] The preset cooling reference data includes at least one of the vehicle operating state, the first battery temperature value, the battery water inlet coolant temperature value and the first ambient temperature value;

[0037] In this embodiment, the data uploaded by each monitoring device or sensor device corresponding to the target vehicle can be obtained through the communication interface as temperature adjustment data. For example, the battery temperature sent by the BMS (Battery Management System), the battery water inlet coolant temperature, and the external environment temperature uploaded by the temperature sensor are received through the CAN network signal. When the battery temperature is greater than the first battery temperature value (such as 38°C), the battery water inlet coolant temperature is greater than the preset water inlet coolant temperature value (such as 30°C), and the external environment temperature is greater than the first environment temperature value (26°C) at the same time, it is considered that the temperature reduction comparison result is a high battery temperature and the battery has a cooling demand, that is, the temperature adjustment data meets the temperature reduction adjustment conditions, and the cooling method can be determined based on the current battery temperature.

[0038] It should be noted that in actual battery cooling scenarios, the battery usually needs to be cooled while the vehicle is driving. In order to ensure the safety of the entire vehicle, the cooling and temperature control function of the power battery can be activated when it is detected that the vehicle is in a working state, that is, when the high voltage of the vehicle is powered on.

[0039] It should also be noted that if the preset temperature adjustment condition is a temperature increase adjustment condition, the data to be compared may be different, and the temperature adjustment data may be compared with the index item data preset in the temperature increase adjustment condition to determine whether the temperature adjustment data meets the temperature increase adjustment condition. Optionally, the preset temperature adjustment condition is a temperature increase adjustment condition, and when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment condition, the battery temperature in the temperature adjustment data is determined, including: obtaining the temperature adjustment data of the target vehicle at the current moment; comparing the temperature adjustment data with the same index item data in the preset temperature increase reference data to obtain a temperature increase comparison result; if the temperature increase comparison result is a low battery temperature, the temperature adjustment data meets the temperature increase adjustment condition, and the battery temperature in the temperature adjustment data is determined.

[0040] The indicator item data corresponds to at least one inspection item of the battery charging state, the charger electronic lock state, the charger temperature, the second battery temperature and the second ambient temperature.

[0041] In the actual battery heating scenario, usually when the battery is charging, in order to ensure that the battery temperature is within a reasonable temperature range, the battery can be heated to improve the battery charging efficiency. At the same time, when the battery is heated, in order to ensure the safety of the entire vehicle, the battery status can be tested for safety. At this time, the temperature adjustment data and the temperature rise reference data can be compared with at least one test item data such as the battery charging status, the charger electronic lock status, the charger temperature, the second battery temperature and the second ambient temperature to determine the comparison result. For example, when the current vehicle key switch status is KeyOFF or KeyACC, the vehicle gear status is P gear, the battery charging gun status is connected, and the VCU receives the charging request signal sent by the BMS as activated, the power battery is controlled to enter the charging state. When the power battery is in charging, if the state of the electronic lock connected to the charging gun sent by the BCM (body control module) is locked, the battery fault-free signal is received, the battery temperature sent by the BMS is greater than the preset second battery temperature, the external ambient temperature is greater than the preset second ambient temperature, and the temperatures reported by the charger's temperature sensor 1 and temperature sensor 2 do not exceed the preset charger temperature (such as 50°C), the power battery is controlled to enter the charging and heating state. At this time, the battery temperature in the temperature adjustment data can be determined to determine the temperature adjustment method based on the battery temperature.

[0042] S120. Determine a rotation duty cycle corresponding to an electric water pump in the target vehicle and a temperature control mode corresponding to a temperature control device based on the battery temperature.

[0043] Among them, the temperature control equipment includes a refrigeration equipment or a heating equipment. The refrigeration equipment can be a heat pump system, which is used to cool the coolant of the power battery. The heating equipment can be a high-pressure water heater PTC (Positive Temperature Coefficient), which is used to heat the coolant of the power battery. When the temperature control data meets the temperature reduction control conditions, the battery temperature can be adjusted based on the refrigeration equipment to cool the battery. When the temperature control data meets the temperature increase control conditions, the battery temperature can be adjusted based on the heating equipment to heat the battery. Correspondingly, the temperature control methods corresponding to the refrigeration equipment and the heating equipment are different. The electric water pump is used to provide coolant flow for the power battery.

[0044] In the present technical solution, the temperature of the coolant corresponding to the battery can be adjusted to achieve the effect of regulating the battery temperature, and the rotation duty ratio of the electric water pump corresponding to the battery temperature can be determined based on the battery temperature. For example, the rotation duty ratio corresponding to the battery temperature can be found in a preset mapping table by a table lookup method; the rotation duty ratio corresponding to the battery temperature can also be determined by a preset curve function, such as the curve function f(z)=a*zb, f(z) is the rotation duty ratio, z is the battery temperature, a and b are parameter values, which can be calibrated by technicians in actual work, such as a=23; b=820, the corresponding function is f(z)=23*z-820, and the battery temperature can be substituted into the function to obtain the corresponding rotation duty ratio. The rotation of the electric water pump is controlled based on the rotation duty ratio to adjust the coolant flow rate. At this time, the temperature adjustment method corresponding to the refrigeration equipment and the heating equipment can be determined based on the battery temperature, and the temperature of the coolant corresponding to the battery can be adjusted by the corresponding temperature adjustment method to achieve the effect of regulating the battery temperature.

[0045] If the temperature adjustment data meets the cooling adjustment condition, optionally, the preset temperature adjustment condition is the cooling adjustment condition, and the temperature adjustment mode corresponding to the refrigeration device is determined based on the battery temperature, including: determining the refrigeration gear based on the battery temperature; determining the temperature adjustment mode corresponding to the refrigeration device based on the refrigeration gear.

[0046] Among them, the cooling effects corresponding to different refrigeration gears may be different. For example, the refrigeration equipment has three refrigeration gears, namely gear 1, gear 2, and gear 3. When the refrigeration equipment is in gear 1 working state, the cooling intensity is relatively weak. When the refrigeration equipment is in gear 3 working state, the cooling intensity is the largest.

[0047] In this embodiment, based on the battery temperature, it can be determined which cooling gear the refrigeration equipment needs to be in. For example, if the battery temperature is 39, it can be controlled to be in gear 1; if the battery temperature is 42, it can be controlled to be in gear 3. Correspondingly, the temperature adjustment method is to control the refrigeration equipment to cool the coolant at the cooling gear. For example, the refrigeration equipment is a heat pump system, and the heat pump system is cooled by an internal condensing device. By designing different working gears of the heat pump system, the coolant in the pipeline is cooled. A working signal can be sent to the heat pump system, as well as an operating gear (such as gear 1, gear 2 or gear 3) instruction of the condensing device for control. The hierarchical cooling of the power battery is realized to improve the effectiveness and energy saving of temperature regulation.

[0048] If the temperature adjustment data meets the temperature rise adjustment condition, optionally, the preset temperature adjustment condition is the temperature rise adjustment condition, and the temperature adjustment mode corresponding to the heating device is determined based on the battery temperature, including: determining the heating duty cycle corresponding to the battery temperature based on the first mapping relationship; determining the heating power corresponding to the heating duty cycle based on the second mapping relationship; and determining the temperature adjustment mode corresponding to the heating device based on the heating power.

[0049] The first mapping relationship corresponds to the battery temperature and the heating duty cycle, and can represent the corresponding relationship between the battery temperature and the heating duty cycle. The second mapping relationship corresponds to the heating duty cycle and the heating power, and can represent the corresponding relationship between the heating duty cycle and the heating power.

[0050] In this embodiment, the heating duty ratio corresponding to the battery temperature can be determined by the first mapping relationship between the battery temperature and the heating duty ratio. For example, the heating duty ratio corresponding to the battery temperature can be found in a preset mapping table by a table lookup method. The heating duty ratio corresponding to the battery temperature can also be determined by a preset curve function. Furthermore, the heating power corresponding to the heating duty ratio can be determined by the second mapping relationship between the heating duty ratio and the heating power. For example, the heating power corresponding to the heating duty ratio can be found in a preset mapping table by a table lookup method. For example, when the heating duty cycle is [0%, 5%], the heating power can be 0, when the heating duty cycle is (5%, 92%], the heating power is linearly controlled from the lowest 0% to the highest 100% power output, when the heating duty cycle is (92%, 95%], the heating power can be 100%, and when the heating duty cycle is (95%, 100%], the heating power can be 0; the preset curve function can also be used to determine the heating power corresponding to the heating duty cycle. The temperature control method is to control the heating device to work with the determined heating power to heat the coolant to achieve the effect of increasing the battery temperature. For example, the heating device is a high-pressure water-heating PTC, and the PTC can be used to heat the coolant. The water-heating PTC can be controlled by sending a PWM duty cycle signal to the water-heating PTC, and the different heating powers of the water-heating PTC are controlled based on the control relationship between the duty cycle signal and the water-heating PTC heating power.

[0051] It should be noted that there may be some low-voltage consumption in the whole vehicle, such as radio, camera and other equipment, which affect battery consumption. In order to improve the accuracy of battery temperature regulation, when determining the heating power corresponding to the heating duty cycle based on the second mapping relationship, the heating power can be corrected according to the low-voltage consumption in the whole vehicle.

[0052] Optionally, after determining the heating power corresponding to the heating duty cycle based on the second mapping relationship, the method further includes: receiving power consumption of power-consuming devices in the target vehicle; and updating the heating power based on the power consumption.

[0053] In practical applications, the DCDC power consumption can be calculated based on the output voltage and output current of the DCDC (conversion of different DC power values) converter, and then the PTC heating power can be dynamically adjusted according to the duty cycle change of the DCDC power consumption with a certain slope (such as 1% / s, which can be calibrated) to ensure that the total power of DCDC and PTC is within a certain value (such as 5kW, which can be calibrated). In this way, the PTC can heat the coolant based on the corrected heating power to achieve the effect of regulating the battery temperature.

[0054] It should be noted that after the power battery enters the charging and heating state, that is, the temperature adjustment data meets the temperature adjustment conditions, a battery charging and heating signal can be sent to the BMS. When the BMS receives the signal, it controls the constant voltage output of the on-board charger and pre-charges the motor controller (MCU, Motor Control Unit) to improve the safety of vehicle charging. When the motor bus voltage signal sent by the MCU is greater than the preset voltage value (such as 350V), it is considered that the MCU pre-charge is completed. Further, the electric water pump can be controlled to operate, and a PWM duty cycle signal (such as 85%) can be sent to the electric water pump, thereby controlling the water heating PTC to enable (enable means working). The PTC can be controlled to work at a certain heating power first, and then the DCDC can be enabled after a preset time (such as 60s). The DCDC power consumption is calculated according to the DCDC output voltage and output current, and the PTC heating power is dynamically adjusted according to the duty cycle change of the DCDC power consumption with a certain slope (such as 1% / s) to ensure that the total power of DCDC and PTC is within a certain value (such as 5kW). Among them, different charging gun models may have different charging power outputs.

[0055] S130. When the electric water pump is controlled to regulate the coolant flow rate based on the rotational duty cycle, the temperature regulating device is controlled to regulate the coolant temperature based on the temperature regulating method, so that the temperature of the battery in the target vehicle is regulated by regulating the coolant temperature.

[0056] In practical applications, the rotation of the electric water pump can be controlled by rotating the duty cycle to regulate the coolant flow. When the coolant flows, the coolant temperature can be regulated by controlling the temperature regulating device to adjust the coolant temperature, so that the temperature of the battery in the target vehicle can be maintained within a reasonable range by adjusting the coolant temperature.

[0057] It should be noted that when the heating device is controlled to heat the coolant, a battery heating signal can also be sent to the instrument, and the instrument will display pictures and text prompts related to battery heating to remind the user of the current battery status. When the battery is charging and heating, an automatic air conditioning learning mode shutdown signal can be sent to the air conditioning controller to prohibit the air conditioning from using high voltage electricity, thereby improving the charging safety of the entire vehicle.

[0058] It should also be noted that when controlling the coolant flow by controlling the electric water pump based on the rotational duty cycle, the rotational duty cycle can be used to determine the speed required to control the electric water pump, and the electric water pump can be controlled to rotate at a speed corresponding to the rotational duty cycle to improve control accuracy.

[0059] Optionally, controlling the electric water pump to regulate the coolant flow based on the rotation duty cycle includes: determining a target speed corresponding to the rotation duty cycle based on a third mapping relationship; and controlling the rotation of the electric water pump based on the target speed to regulate the coolant flow when the electric water pump rotates.

[0060] The third mapping relationship corresponds to the rotation duty cycle and the target rotation speed, and can represent the corresponding relationship between the rotation duty cycle and the target rotation speed.

[0061] In this embodiment, the target speed corresponding to the rotation duty cycle can be found in a preset mapping table by a table lookup method. When the electric water pump rotates at different speed values, the coolant flow rate is also different. For example, when the rotation duty cycle is 0, the electric water pump speed is controlled to be 0, when the rotation duty cycle is [1%, 10%], the electric water pump is controlled to rotate at the highest speed (such as 5000rpm), when the rotation duty cycle is (10%, 15%), the electric water pump speed is controlled to be 0, when the rotation duty cycle is [15%, 85%], the electric water pump is controlled to be linearly controlled from the lowest to the highest speed, and when the rotation duty cycle is (85%, 97%), the electric water pump is controlled to rotate at the highest speed (such as 5000rpm); the preset curve function can also be used to determine the target speed corresponding to the rotation duty cycle so that the electric water pump rotates at the corresponding target speed.

[0062] It should be noted that in order to improve the accuracy of battery temperature control, prevent the heating equipment from heating the battery for a long time and affecting the performance, or prevent related components from malfunctioning and causing danger during the battery charging process, it is possible to monitor the data related to battery charging in real time, such as the charger status, charging gun connection status, etc., to determine whether the vehicle is charging safely, or monitor whether the battery temperature is within a reasonable range.

[0063] Optionally, charging feedback data of the target vehicle at the next moment is obtained; the vehicle feedback data is compared with preset charging reference data to obtain a charging comparison result; if the charging comparison result is a charging abnormality, the working state of the heating device is controlled to be a temperature control prohibited state.

[0064] The charging feedback data includes at least one of the charger working state, charger connection state, battery charging state, charger electronic lock state, charger temperature value, motor bus voltage value and battery temperature value. The preset charging reference data corresponds to the charging feedback data.

[0065] In this embodiment, the preset charging reference data can be compared with the same indicator data in the charging feedback data. If there is an indicator data that does not match, the charging comparison result can be considered to be abnormal charging. For example, when the power battery is in the heating process, if it is detected that the charging gun is not connected or abnormally connected, the high-voltage system is faulty, the temperature sensor 1 or the temperature sensor 2 of the charger reports a temperature exceeding a preset threshold (such as 50°C), the motor bus voltage is judged to be less than a preset voltage value (such as 350V) within a preset time (such as 5 minutes), the charger has been reporting that the charger is in an uncharged state within a preset time (such as 5 minutes), the electronic lock state is unlocked, and the BMS sends at least one of the following signals without heating request, the power battery heating function is exited, that is, the working state of the heating device is controlled to be a temperature-prohibited state. When the battery heating function is controlled to exit, a battery no heating signal can be sent to the instrument; a CAN message prohibition enable signal can be sent to the DCDC to prohibit the DCDC from working; a PWM signal can be sent to the PTC to prohibit the water heating PTC from outputting power; a shutdown command can be sent to the electric water pump to control the electric water pump to stop working; a battery charging and heating not allowed signal can be sent to the BMS; a signal can be sent to the BMS to control the charger output current to be 0, that is, the charger stops outputting charging current, etc.

[0066] It should be noted that the preset cooling reference data, the preset heating reference data, the first mapping relationship, the second mapping relationship, and the third mapping relationship in the present technical solution can all be determined by technical personnel according to actual working conditions, and the present technical solution does not limit them here.

[0067] The technical solution of this embodiment is to determine the battery temperature in the temperature adjustment data when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment conditions; determine the rotation duty cycle corresponding to the electric water pump in the target vehicle and the temperature adjustment mode corresponding to the refrigeration device or the heating device based on the battery temperature; when the electric water pump is controlled to adjust the coolant flow based on the rotation duty cycle, the temperature adjustment device is controlled to adjust the coolant temperature based on the temperature adjustment mode, so that the temperature of the battery in the target vehicle is regulated by adjusting the coolant temperature, which solves the problem of poor battery temperature adjustment effect and low efficiency caused by controlling the fan operation to cool the battery in the prior art, and realizes that the rotation duty cycle corresponding to the electric water pump in the target vehicle is determined based on the battery temperature; when the electric water pump is controlled to adjust the coolant flow based on the rotation duty cycle, the refrigeration device or the heating device is controlled to adjust the coolant temperature based on the corresponding temperature adjustment mode, so that the temperature of the battery is regulated by adjusting the coolant temperature, thereby improving the convenience of temperature adjustment and achieving the technical effect of improving the battery temperature adjustment effect and efficiency.

[0068] Embodiment 2

[0069] As an optional embodiment of the above embodiment, in order to make those skilled in the art further understand the technical solution of the embodiment of the present invention, a specific application scenario example is given. For details, please refer to the following specific content.

[0070] In order to ensure that the battery temperature in the target vehicle is within a reasonable operating temperature, it can be achieved by controlling battery cooling and battery heating. For example, when the battery needs to be cooled, the battery can be cooled by a refrigeration device (such as a heat pump system), and when the battery needs to be heated, the battery can be heated by a heating device (such as a high-pressure water heater PTC). For example, see Figure 2 , the vehicle control unit (VCU, Vehicle Control Unit) can be used to control the electric water pump, heat pump system and high-pressure water heating PTC. The electric water pump is used to provide coolant flow for the power battery. The control of the electric water pump includes start and stop. The start of the electric water pump means that the electric water pump can run and rotate, and the electric water pump shutdown means that the electric water pump stops rotating. In addition to the start and shutdown control, the VCU is also required to control the speed of the electric water pump by sending a PWM duty cycle signal (i.e., the rotation duty cycle). The heat pump system is used to cool the coolant of the power battery. The heat pump system can be cooled by the internal condensing device. By designing different working gears of the heat pump system, the coolant in the pipeline is cooled, thereby realizing graded cooling of the power battery (such as low-gear and high-gear cooling). The VCU controls the heat pump system to cool by sending "on and off" signals to the heat pump system, as well as the operating gear (low-gear and high-gear) instructions of the condensing device. The high-voltage water-heating PTC is used to heat the coolant of the power battery. The high-voltage water-heating PTC can use PTC to heat the coolant, and the VCU can send a PWM duty cycle (heating duty cycle) signal to control the water-heating PTC heating.

[0071] Based on the above solution, the vehicle controller can obtain the temperature signal of the DC converter body collected by the sensor arranged in the DCDC, the temperature signal of the charger body collected by the sensor arranged in the charger, the temperature signal of the thermal management water circuit coolant collected by the temperature sensor arranged in the pipeline, the battery core temperature, the battery water inlet temperature and the battery working status reported by the BMS, and control the operation of the electric water pump, the heat pump system and the high-pressure water heating PTC through the obtained temperature adjustment data. For example, see Figure 3Different controllers communicate with each other through CAN network signals. When the high voltage of the whole vehicle is powered on, the thermal management function of the power battery is activated. The VCU needs to control the start of the electric water pump according to the signal reported by the BMS. For example, during the driving of the vehicle, when the battery temperature sent by the BMS received by the VCU is greater than the preset temperature value (such as 38°C), the electric water pump can be controlled according to the preset curve function. The curve function is fitted through the calibration points and the curve function is placed in the control software in advance. For example, the curve function is f(z)=az-b, f(z) is the rotation duty cycle, and z is the battery temperature. a and b are both parameter values, which can be calibrated by technicians in actual work, such as a=23; b=820, and the corresponding function is f(z)=23*z-820. The battery temperature can be substituted into the function to obtain the corresponding rotation duty cycle. Furthermore, the target speed corresponding to the rotation duty cycle can be found in the preset mapping table by the table lookup method. For example, when the rotation duty cycle is 0, the electric water pump speed is controlled to be 0. When the rotation duty cycle is [1%, 10%], the electric water pump is controlled to rotate at the highest speed (such as 5000rpm). When the rotation duty cycle is (10%, 15%), the electric water pump speed is controlled to be 0. When the rotation duty cycle is [15%, 85%], the electric water pump is controlled to be linearly controlled from the lowest to the highest speed. When the rotation duty cycle is (85%, 97%), the electric water pump is controlled to rotate at the highest speed (such as 5000rpm). So that the electric water pump rotates at the corresponding target speed and adjusts the coolant flow. Further, when the VCU determines that the battery temperature sent by the BMS is less than the preset threshold (such as 30°C), or the high-voltage power-down is completed, it can be considered that the battery has no cooling demand, and the VCU controls the electric water pump to exit work, that is, the electric water pump stops rotating.

[0072] On the basis of the above scheme, when the VCU determines that the battery temperature sent by the BMS is greater than the first battery temperature value (such as 38°C), the battery water inlet coolant temperature is greater than the preset water inlet coolant temperature value (such as 30°C), and the external environment temperature is greater than the first environment temperature value (such as 26°C), it can be considered that the battery has a cooling demand, and the VCU can send a battery cooling request to the heat pump system, and the condensing device in the heat pump system starts working. When the VCU determines that the battery temperature sent by the BMS is less than the preset temperature value (such as 30°C), the battery water inlet coolant temperature is less than the preset temperature (such as 22°C), or the driver operates the key as KeyOff or KeyACC (high voltage off), it can be considered that the battery has no cooling demand, and the VCU can send a battery no cooling demand signal to the heat pump system, and the condensing device in the heat pump system stops working.

[0073] On the basis of the above scheme, when the key switch state is KeyOFF or KeyACC, the gear state of the vehicle is P gear, the battery charging gun state is connected, and the VCU receives the charging request signal sent by the BMS as activated, the power battery can be controlled to enter the charging state. When the power battery is charging, if the VCU receives the state of the electronic lock connected to the charging gun sent by the BCM (body control module) as locked, receives the battery fault-free signal, receives the battery temperature sent by the BMS greater than the preset second battery temperature, the external environment temperature is greater than the preset second environment temperature, and the temperature reported by the temperature sensor 1 and the temperature sensor 2 of the charger does not exceed the preset charger temperature (such as 50°C), then the power battery is controlled to enter the charging and heating state. When the power battery enters the charging and heating state, the VCU can send a charging permission heating signal to the BMS, and then when the BMS receives the charging permission heating signal, it controls the constant voltage output of the on-board charger and pre-charges the motor controller MCU. When the motor bus voltage signal sent by the MCU received by the VCU is greater than the preset voltage value (such as 350V), it is considered that the MCU pre-charging is completed. Furthermore, the VCU controls the operation of the electric water pump and sends a PWM duty cycle signal of a preset threshold (such as 85%) to the electric water pump, and then the VCU controls the water heating PTC to be in working state. For example, the VCU can first control the PTC to work at a certain heating power, and then control the DCDC to enable after a preset duration (such as 60s). The DCDC power consumption is calculated according to the DCDC output voltage and output current, and the PTC heating power is dynamically adjusted according to the duty cycle change of the DCDC power consumption with a certain slope (such as 1% / s) to ensure that the total power of DCDC and PTC is within a certain value (such as 5kW). Among them, the charging power output may be different for different charging gun models.

[0074] On the basis of the above scheme, when VCU controls water heating PTC heating, it can send a battery heating information display signal to the instrument to make the instrument display some pictures and text prompts related to battery heating. When the battery is charging and heating, VCU sends an off signal to the air conditioning controller to prohibit the air conditioning from using high voltage electricity.

[0075] On the basis of the above scheme, when the power battery is in the heating process, the VCU can detect that the state of the electric gun is not connected or abnormally connected, the high-voltage system is faulty, the temperature sensor 1 or the temperature sensor 2 of the charger reports a temperature exceeding a preset threshold (such as 50°C), the motor bus voltage is judged to be less than a preset voltage value (such as 350V) within a preset time (such as 5 minutes), the charger has been reporting that the charger is in an uncharged state within a preset time (such as 5 minutes), the electronic lock state is unlocked, or the BMS sends a no heating request signal, and then control the exit of the power battery heating function, that is, control the working state of the heating device to be a prohibited temperature adjustment state. The whole vehicle exits the AC charging heating function, and the VCU can send a battery no heating signal to the instrument; send a CAN message to the DCDC to prohibit the enable signal to prohibit the DCDC from working; send a PWM signal to the PTC to prohibit the water heating PTC from outputting power; send a shutdown command to the electric water pump to control the electric water pump to stop working; send a signal to the BMS that does not allow battery charging and heating; send a signal to the BMS to control the charger output current to 0, that is, the charger stops outputting charging current, etc.

[0076] This technical solution uses the coordinated control and algorithm of the VCU vehicle controller to reasonably control the operating speed of the electric water pump, the cooling control of the heat pump system, and the heating control of the high-pressure water heater PTC according to the coolant flow demand and related temperature conditions of the battery, thereby achieving effective control of the thermal management of the power battery, avoiding the power system power reduction, vehicle power limitation, or vehicle thermal failure caused by overheating of the power battery or other assembly components, and ensuring the reliability, safety and stability of the vehicle operation.

[0077] The technical solution of this embodiment is to determine the battery temperature in the temperature adjustment data when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment conditions; determine the rotation duty cycle corresponding to the electric water pump in the target vehicle and the temperature adjustment mode corresponding to the refrigeration device or the heating device based on the battery temperature; when the electric water pump is controlled to adjust the coolant flow based on the rotation duty cycle, the temperature adjustment device is controlled to adjust the coolant temperature based on the temperature adjustment mode, so that the temperature of the battery in the target vehicle is regulated by adjusting the coolant temperature, which solves the problem of poor battery temperature adjustment effect and low efficiency caused by controlling the fan operation to cool the battery in the prior art, and realizes that the rotation duty cycle corresponding to the electric water pump in the target vehicle is determined based on the battery temperature; when the electric water pump is controlled to adjust the coolant flow based on the rotation duty cycle, the refrigeration device or the heating device is controlled to adjust the coolant temperature based on the corresponding temperature adjustment mode, so that the temperature of the battery is regulated by adjusting the coolant temperature, thereby improving the convenience of temperature adjustment and achieving the technical effect of improving the battery temperature adjustment effect and efficiency.

[0078] Embodiment 3

[0079] Figure 4Schematic diagram of a temperature control device according to Embodiment 3 of the present invention. Figure 4 As shown, the device includes: a battery temperature determination module 410 , a temperature adjustment mode determination module 420 and a temperature adjustment module 430 .

[0080] Among them, the battery temperature determination module 410 is used to determine the battery temperature in the temperature adjustment data when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment conditions; the temperature adjustment mode determination module 420 is used to determine the rotation duty cycle corresponding to the electric water pump in the target vehicle and the temperature adjustment mode corresponding to the temperature adjustment device based on the battery temperature, wherein the temperature adjustment device includes a refrigeration device or a heating device; the temperature adjustment module 430 is used to control the temperature adjustment device to adjust the coolant temperature based on the temperature adjustment mode when controlling the electric water pump to adjust the coolant flow based on the rotation duty cycle, so that the temperature of the battery in the target vehicle can be regulated by adjusting the coolant temperature.

[0081] The technical solution of this embodiment is to determine the battery temperature in the temperature adjustment data when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment conditions; determine the rotation duty cycle corresponding to the electric water pump in the target vehicle and the temperature adjustment mode corresponding to the refrigeration device or the heating device based on the battery temperature; when the electric water pump is controlled to adjust the coolant flow based on the rotation duty cycle, the temperature adjustment device is controlled to adjust the coolant temperature based on the temperature adjustment mode, so that the temperature of the battery in the target vehicle is regulated by adjusting the coolant temperature, which solves the problem of poor battery temperature adjustment effect and low efficiency caused by controlling the fan operation to cool the battery in the prior art, and realizes that the rotation duty cycle corresponding to the electric water pump in the target vehicle is determined based on the battery temperature; when the electric water pump is controlled to adjust the coolant flow based on the rotation duty cycle, the refrigeration device or the heating device is controlled to adjust the coolant temperature based on the corresponding temperature adjustment mode, so that the temperature of the battery is regulated by adjusting the coolant temperature, thereby improving the convenience of temperature adjustment and achieving the technical effect of improving the battery temperature adjustment effect and efficiency.

[0082] On the basis of the above device, optionally, the preset temperature adjustment condition is a cooling adjustment condition, and the battery temperature determination module 410 includes a temperature adjustment data determination unit, a cooling comparison result determination unit and a battery temperature determination unit.

[0083] A temperature adjustment data determination unit, used to obtain temperature adjustment data of the target vehicle at the current moment;

[0084] A cooling comparison result determination unit, used to compare the temperature adjustment data with preset cooling reference data to determine a cooling comparison result; wherein the preset cooling reference data includes at least one of a vehicle operating state, a first battery temperature value, a water inlet coolant temperature value, and a first ambient temperature value;

[0085] The battery temperature determination unit is used to determine the battery temperature in the temperature adjustment data if the temperature reduction comparison result is that the battery is at a high temperature, the temperature adjustment data satisfies the temperature reduction adjustment condition, and determines the battery temperature in the temperature adjustment data.

[0086] On the basis of the above device, optionally, the preset temperature adjustment condition is a temperature rise adjustment condition, and the battery temperature determination module 410 includes a temperature adjustment data acquisition unit, a temperature rise comparison result determination unit and a second battery temperature determination unit.

[0087] A temperature adjustment data acquisition unit, used to acquire temperature adjustment data of the target vehicle at the current moment;

[0088] a temperature rise comparison result determination unit, configured to compare the temperature adjustment data with the same index item data in the preset temperature rise reference data to obtain a temperature rise comparison result; wherein the index item data corresponds to at least one inspection item of the battery charging state, the charger electronic lock state, the charger temperature, the second battery temperature and the second ambient temperature;

[0089] The second battery temperature determination unit is used to determine the battery temperature in the temperature adjustment data if the temperature increase comparison result is that the battery is at a low temperature, and whether the temperature adjustment data meets the temperature increase adjustment condition.

[0090] On the basis of the above device, optionally, the preset temperature adjustment condition is a cooling adjustment condition, and the temperature adjustment mode determination module 420 includes a cooling gear determination unit and a temperature adjustment mode determination unit.

[0091] a cooling gear determination unit, configured to determine a cooling gear based on the battery temperature;

[0092] A temperature adjustment mode determining unit is used to determine a temperature adjustment mode corresponding to the refrigeration device based on the refrigeration gear.

[0093] On the basis of the above device, optionally, the preset temperature adjustment condition is a temperature rise adjustment condition, and the temperature adjustment mode determination module 420 includes a heating duty cycle determination unit, a heating power determination unit and a second temperature adjustment mode determination unit.

[0094] a heating duty ratio determining unit, configured to determine a heating duty ratio corresponding to the battery temperature based on a first mapping relationship, wherein the first mapping relationship corresponds to the battery temperature and the heating duty ratio;

[0095] a heating power determining unit, configured to determine the heating power corresponding to the heating duty cycle based on a second mapping relationship, wherein the second mapping relationship corresponds to the heating duty cycle and the heating power;

[0096] The second temperature control mode determination unit is used to determine the temperature control mode corresponding to the heating device based on the heating power.

[0097] On the basis of the above device, optionally, the temperature adjustment mode determination module 420 further includes a heating power update unit, wherein the heating power update unit includes a consumption power determination subunit and a heating power update subunit.

[0098] a power consumption determination subunit, configured to receive power consumption of power-consuming devices in a target vehicle;

[0099] A heating power updating subunit is used to update the heating power based on the consumed power.

[0100] On the basis of the above device, optionally, the temperature adjustment module 430 includes: a target speed determination unit and a coolant flow control unit.

[0101] a target speed determination unit, configured to determine a target speed corresponding to the rotation duty cycle based on a third mapping relationship, wherein the third mapping relationship corresponds to the rotation duty cycle and the target speed;

[0102] The coolant flow control unit is used to control the rotation of the electric water pump based on the target speed, so as to control the coolant flow when the electric water pump rotates.

[0103] On the basis of the above device, optionally, the device further includes: a temperature adjustment prohibiting module, the temperature adjustment prohibiting module includes a charging feedback data determination unit, a charging comparison result determination unit and a temperature adjustment prohibiting unit.

[0104] A charging feedback data determination unit, used to obtain charging feedback data of the target vehicle at the next moment; wherein the charging feedback data includes a charger working state, a charger connection state, a battery charging state, a charger electronic lock state, a charger temperature value, a motor bus voltage value, and a battery temperature value;

[0105] A charging comparison result determination unit, used for comparing the vehicle feedback data with preset charging reference data to obtain a charging comparison result;

[0106] The temperature adjustment prohibiting unit is used to control the working state of the heating device to a temperature adjustment prohibiting state if the charging comparison result is abnormal charging.

[0107] The temperature control device provided in the embodiment of the present invention can execute the temperature control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0108] Embodiment 4

[0109] Figure 5 : is a schematic diagram of the structure of an electronic device for implementing the temperature control method of an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0110] like Figure 5 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0111] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0112] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a temperature control method.

[0113] In some embodiments, the temperature control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the temperature control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the temperature control method in any other appropriate manner (e.g., by means of firmware).

[0114] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0115] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0116] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0117] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0118] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0119] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0120] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0121] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature control method, characterized in that: include: When it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment condition, determining the battery temperature in the temperature adjustment data; Determining a rotation duty ratio corresponding to an electric water pump in the target vehicle and a temperature control mode corresponding to a temperature control device based on the battery temperature, wherein the temperature control device includes a refrigeration device or a heating device; When the electric water pump is controlled to adjust the coolant flow rate based on the rotation duty cycle, the temperature regulating device is controlled to adjust the coolant temperature based on the temperature regulating method, so that the temperature of the battery in the target vehicle is regulated by adjusting the coolant temperature; Wherein, controlling the electric water pump to regulate the coolant flow based on the rotation duty cycle includes: Determine the target speed corresponding to the rotation duty cycle based on a third mapping relationship, the third mapping relationship corresponds to the rotation duty cycle and the target speed; wherein, determining the target speed corresponding to the rotation duty cycle based on the third mapping relationship comprises: searching for the target speed corresponding to the rotation duty cycle in a preset mapping table, when the rotation duty cycle is 0, the target speed is 0, when the rotation duty cycle is [1%, 10%], the target speed is the highest speed, when the rotation duty cycle is (10%, 15%), the target speed is 0, when the rotation duty cycle is [15%, 85%], the target speed changes linearly from the lowest speed to the highest speed, and when the rotation duty cycle is (85%, 97%), the target speed is the highest speed; controlling the electric water pump to rotate based on the target speed to regulate the flow of coolant when the electric water pump rotates; The preset temperature adjustment condition is a temperature rise adjustment condition, and the temperature adjustment mode corresponding to the heating device is determined based on the battery temperature, including: determining a heating duty cycle corresponding to the battery temperature based on a first mapping relationship, wherein the first mapping relationship corresponds to the battery temperature and the heating duty cycle; determining a heating power corresponding to the heating duty cycle based on a second mapping relationship, wherein the second mapping relationship corresponds to the heating duty cycle and the heating power; Receiving power consumption of a power-consuming device in a target vehicle, and updating the heating power based on the power consumption, including: dynamically adjusting the heating power according to a duty cycle change with a certain slope of the power consumption to ensure that the total power of the power-consuming device and the heating device is within a certain value; Based on the heating power, a temperature adjustment method corresponding to the heating device is determined.

2. The method according to claim 1, characterized in that The preset temperature adjustment condition is a temperature reduction adjustment condition, and when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment condition, determining the battery temperature in the temperature adjustment data includes: Obtain temperature adjustment data of the target vehicle at the current moment; Comparing the temperature adjustment data with preset cooling reference data to determine a cooling comparison result; wherein the preset cooling reference data includes at least one of a vehicle operating state, a first battery temperature value, a water inlet coolant temperature value, and a first ambient temperature value; If the temperature reduction comparison result is that the battery is at a high temperature, the temperature adjustment data satisfies the temperature reduction adjustment condition, and the battery temperature in the temperature adjustment data is determined.

3. The method according to claim 1, characterized in that The preset temperature adjustment condition is a temperature rise adjustment condition, and when it is detected that the temperature adjustment data of the target vehicle at the current moment meets the preset temperature adjustment condition, determining the battery temperature in the temperature adjustment data includes: Obtain temperature adjustment data of the target vehicle at the current moment; Compare and process the temperature adjustment data with the same index item data in the preset temperature rise reference data to obtain a temperature rise comparison result; wherein the index item data corresponds to at least one inspection item of the battery charging state, the charger electronic lock state, the charger temperature, the second battery temperature and the second ambient temperature; If the temperature increase comparison result is that the battery is at a low temperature, the temperature adjustment data satisfies the temperature increase adjustment condition, and the battery temperature in the temperature adjustment data is determined.

4. The method according to claim 1, characterized in that: The preset temperature adjustment condition is a temperature reduction adjustment condition, and the temperature adjustment mode corresponding to the refrigeration device is determined based on the battery temperature, including: Determining a cooling gear based on the battery temperature; Based on the refrigeration gear, a temperature adjustment mode corresponding to the refrigeration equipment is determined.

5. The method according to claim 1, characterized in that Also includes: Obtain charging feedback data of the target vehicle at the next moment; wherein the charging feedback data includes charger working status, charger connection status, battery charging status, charger electronic lock status, charger temperature value, motor bus voltage value and battery temperature value; Comparing the charging feedback data of the target vehicle with the preset charging reference data to obtain a charging comparison result; If the charging comparison result is abnormal charging, the working state of the heating device is controlled to be a temperature adjustment prohibited state.

6. A temperature control device, characterized in that: include: A battery temperature determination module, configured to determine the battery temperature in the temperature adjustment data when detecting that the temperature adjustment data of the target vehicle at the current moment meets a preset temperature adjustment condition; a temperature control mode determination module, configured to determine a rotation duty ratio corresponding to an electric water pump in the target vehicle and a temperature control mode corresponding to a temperature control device based on the battery temperature, wherein the temperature control device includes a refrigeration device or a heating device; a temperature regulating module, configured to control the temperature regulating device to regulate the temperature of the coolant based on the temperature regulating mode when the electric water pump is controlled to regulate the coolant flow based on the rotation duty cycle, so that the temperature of the battery in the target vehicle is regulated by regulating the coolant temperature; Wherein, the temperature adjustment module includes: a target speed determination unit and a coolant flow control unit; The target speed determination unit is used to determine the target speed corresponding to the rotation duty cycle based on a third mapping relationship, and the third mapping relationship corresponds to the rotation duty cycle and the target speed; wherein the determination of the target speed corresponding to the rotation duty cycle based on the third mapping relationship includes: searching for the target speed corresponding to the rotation duty cycle in a preset mapping table, when the rotation duty cycle is 0, the target speed is 0, when the rotation duty cycle is [1%, 10%], the target speed is the highest speed, when the rotation duty cycle is (10%, 15%), the target speed is 0, when the rotation duty cycle is [15%, 85%], the target speed changes linearly from the lowest speed to the highest speed, and when the rotation duty cycle is (85%, 97%), the target speed is the highest speed; The coolant flow control unit is used to control the rotation of the electric water pump based on the target speed, so as to control the coolant flow when the electric water pump rotates; The preset temperature adjustment condition is a temperature rise adjustment condition, and the temperature adjustment mode determination module includes a heating duty cycle determination unit, a heating power determination unit, a heating power update unit and a temperature adjustment mode determination unit. a heating duty ratio determining unit, configured to determine a heating duty ratio corresponding to the battery temperature based on a first mapping relationship, wherein the first mapping relationship corresponds to the battery temperature and the heating duty ratio; a heating power determining unit, configured to determine the heating power corresponding to the heating duty cycle based on a second mapping relationship, wherein the second mapping relationship corresponds to the heating duty cycle and the heating power; A heating power updating unit, configured to receive the power consumption of the power-consuming device in the target vehicle, and update the heating power based on the power consumption, including: dynamically adjusting the heating power according to the duty cycle change of the power consumption with a certain slope, to ensure that the total power of the power-consuming device and the heating device is within a certain value; The second temperature control mode determination unit is used to determine the temperature control mode corresponding to the heating device based on the heating power.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the temperature control method according to any one of claims 1 to 5 when executed.

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