Intelligent low-temperature long-endurance control method and system for electric vehicle

Abstract

According to the intelligent low-temperature long-endurance control method and system for the electric vehicle, the current temperature of the environment where the electric vehicle is located is obtained in real time, whether the current temperature of the environment is in the low-temperature environment or not is judged, and when the current temperature of the environment is smaller than the first preset temperature threshold value, it is indicated that the environment is in the low-temperature environment; if yes, the storage battery is subjected to heat preservation or heating according to the current environment temperature; and the charging and discharging current of the storage battery is determined according to the current temperature of the storage battery, so that the charging and discharging current of the storage battery can be controlled according to the current temperatures of different environments, and the service life of the storage battery is longer.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to an intelligent low-temperature and long-range control method and system for electric vehicles. Background Art

[0002] In the prior art, a traditional electric bicycle is used, which has a fast starting speed and is ridden in a conventional mode under different temperature conditions such as low temperature. The battery is still charged and discharged in a conventional charging mode, which will damage the battery of the electric bicycle and affect the mileage. Summary of the invention

[0003] In view of this, the purpose of this application is to propose an intelligent low-temperature and long-range control method and system for electric vehicles to solve all or part of the technical problems existing in the background technology.

[0004] Based on the above purpose, the present application provides an intelligent low-temperature long-range control method for electric vehicles, comprising:

[0005] Get the current temperature of the environment where the electric vehicle is located in real time;

[0006] In response to the current temperature of the environment being less than a first preset temperature threshold, the battery is kept warm and heated according to the current temperature of the environment;

[0007] The charging and discharging current of the battery is determined according to the current temperature of the battery, and the operation of the battery is controlled according to the charging and discharging current of the battery.

[0008] Optionally, the step of keeping the battery warm and heating the battery according to the current temperature of the environment includes:

[0009] In response to the current temperature of the environment being greater than a second preset temperature threshold, controlling the cover of the external heat preservation box of the battery to be in a closed state to keep the battery warm;

[0010] In response to the current temperature of the environment being less than a second preset temperature threshold, a plurality of control modes are used to control the internal heating component of the external insulation box of the battery to be in an on state to heat the battery.

[0011] Optionally, the separate power supply control mode includes: a solar panel power supply control mode, an AC transformer power supply control mode and a battery power supply control mode;

[0012] The method of controlling the internal heating component of the external insulation box of the battery to be in an on state to heat the battery by using a separate power supply control method includes:

[0013] In response to the normal operation of the solar panel power supply control mode, the solar panel power supply control mode is used to power the incubator, so that the heating component inside the incubator is turned on to heat the battery;

[0014] In response to abnormal operation of the solar panel power supply control mode, an AC transformer power supply control mode or a battery power supply control mode is used to power the incubator, so that the internal heating component of the incubator is turned on to heat the battery.

[0015] Optionally, determining the charging and discharging current of the battery according to the current temperature of the battery includes:

[0016] In response to the current temperature of the environment being within a first temperature range, searching a preset rule table for a first current limit value corresponding to the current temperature of the battery, and using the first current limit value as the charging and discharging current of the battery;

[0017] In response to the current temperature of the battery being within a second temperature range, searching a preset rule table for a second current limit value corresponding to the current temperature of the battery, and using the second current limit value as the charging and discharging current of the battery;

[0018] In response to the current temperature of the battery being within a third temperature range, searching a preset rule table for a third current limit value corresponding to the current temperature of the battery, and using the third current limit value as the charging and discharging current of the battery;

[0019] In response to the current temperature of the battery being within a fourth temperature range, a fourth current limiting value corresponding to the current temperature of the battery is searched in a preset rule table, and the fourth current limiting value is used as the charging and discharging current of the battery.

[0020] Optionally, the method further includes: in response to the current temperature of the environment being greater than a second preset threshold, dissipating heat for the battery.

[0021] Optionally, dissipating heat from the battery includes:

[0022] The cover of the external heat preservation box of the battery is controlled to open to dissipate heat from the battery.

[0023] Based on the same inventive concept, the present application also provides an electric vehicle intelligent low-temperature long-range control system, including:

[0024] Temperature collection subsystem, used to collect the current temperature of the environment;

[0025] A main control system, used to receive the current temperature of the environment collected by the temperature collection system, and generate a battery preheating control instruction and a battery discharge and charge control instruction according to the current temperature of the environment, and send a preheating control signal and a battery charge and discharge control signal;

[0026] A battery preheating subsystem, comprising a solar preheating submodule, an AC transformer preheating submodule and a battery preheating submodule, wherein the execution levels of the solar preheating submodule, the AC transformer preheating submodule and the battery preheating submodule are successively lowered; and is used to receive the preheating control signal, and heat the battery using the solar preheating submodule, the AC transformer preheating submodule or the battery preheating submodule according to the preheating control signal;

[0027] The battery discharge and charge control subsystem is used to receive the battery charge and discharge control signal of the main control system, and control the battery discharge and charge according to the control instruction based on the received battery charge and discharge control signal of the main control system.

[0028] Optionally, the solar preheating submodule includes a solar preheating circuit, which includes: a reflective concentrator, an optical frequency division duplexer, a crystalline silicon solar panel, an amorphous silicon solar panel, a first electronic controller and a battery; the reflective concentrator is connected to the input end of the optical frequency division duplexer, two output ends of the optical frequency division duplexer are respectively connected to the crystalline silicon solar panel and the amorphous silicon solar panel, the positive and negative poles of the crystalline silicon solar panel and the amorphous silicon solar panel are both connected to the input end of the electronic controller, and the output end of the first electronic controller is connected to the heating wire in the insulation box outside the battery.

[0029] Optionally, the AC transformer preheating submodule includes an AC transformer preheating circuit, which includes: a power battery, a transformer, and a second electronic controller. One end of the secondary side of the transformer is connected to the positive electrode of the power battery, and the other end is connected to the negative electrode of the high-voltage bus of the second electronic controller. One end of the primary side of the transformer is connected to the first output end of the second electronic control circuit through an on-off switch, and the other end of the primary side of the transformer is connected to the second output end of the second electronic control circuit. The negative electrode of the power battery is connected to the positive electrode of the high-voltage bus of the second electronic control circuit, and the third output end of the second electronic control circuit is connected to the heating wire in the insulation box outside the battery.

[0030] Optionally, the battery preheating submodule includes a battery preheating current, and the battery preheating circuit includes: a switch, a diode, a resistor, and an LED lamp, the switch, diode, resistor, and LED lamp are connected in series, one end is connected to the positive electrode of the battery, and the other end is connected to the negative electrode of the battery, wherein the heating wire is connected in parallel with the switch, diode, resistor, and LED lamp.

[0031] From the above description, it can be seen that the present application provides an intelligent low-temperature long-endurance control method and system for electric vehicles, which obtains the current temperature of the environment in which the electric vehicle is located in real time, and determines whether the current temperature of the environment is in a low-temperature environment. When the current temperature of the environment is less than the first preset temperature threshold, it means that the environment is in a low-temperature environment, and the battery is kept warm or heated according to the current temperature of the environment; and the charge and discharge current of the battery is determined according to the current temperature of the battery, so that the charge and discharge current of the battery can be controlled according to different current temperatures of the environment, thereby extending the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 This is a schematic flow chart of an intelligent low-temperature long-range control method for an electric vehicle according to an embodiment of the present application;

[0034] Figure 2 A schematic diagram of a specific process flow of an embodiment of the present application;

[0035] Figure 3 This is a schematic diagram of the heat preservation structure of an embodiment of the present application;

[0036] Figure 4 A cross-sectional schematic diagram of an incubator box according to an embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the structural framework of an intelligent low-temperature and long-range control system for an electric vehicle according to an embodiment of the present application;

[0038] Figure 6 A schematic diagram of a solar preheating circuit according to an embodiment of the present application;

[0039] Figure 7 A schematic diagram of an AC transformer preheating circuit according to an embodiment of the present application;

[0040] Figure 8 A schematic diagram of a battery preheating circuit according to an embodiment of the present application;

[0041] Fig. 9 A schematic diagram of the hardware structure of an electronic device according to an embodiment of the present application.

[0042] Reference numerals:

[0043] 11. Heating wire; 12. Slide groove; 13. Rack; 14. Motor; 15. Gear; 16. Magnet. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] Based on the background technology, the electric bicycles currently on the market comply with the GB17761-2018 standard, which requires the vehicle to be ≤55kg. The battery capacity of the electric bicycle is relatively small, resulting in a limited range of mileage. As the temperature of the electric bicycle battery decreases, the chemical reaction slows down and the available capacity of the battery decreases. At the same time, under low temperature conditions, the charging efficiency and discharge power decrease. Under low temperature conditions, the internal resistance of the battery increases, the instantaneous discharge capacity weakens, and the starting power is weak.

[0047] When charging at low temperatures, the viscosity of the electrolyte in the lithium-ion battery increases, and the efficiency of the electrochemical reaction decreases; the lithium ions will form crystals inside, and the continuous movement will pierce the diaphragm to form a short circuit, which may cause a fire safety accident during charging;

[0048] If you simply heat the battery directly, the power usage efficiency is low because part of the power needs to be supplied to the heating end. If you mistakenly heat the battery in hot weather, it will cause the battery to overheat and affect safe riding. In spring and autumn weather (high temperature at noon and low temperature in the morning and evening), it is a waste of power if you use a heating device.

[0049] The use of electric bicycles requires faster starting. The instantaneous high current discharge (increasing the discharge power) of the battery will cause greater damage to the battery, resulting in a decrease in battery life.

[0050] With traditional electric bicycles, the starting speed is fast, and the normal riding mode is used under different temperature conditions such as low temperature. The battery charging and discharging still uses the normal charging mode, which will damage the electric bicycle battery and affect the mileage. To solve the above shortcomings, it is necessary to adopt an electric bicycle intelligent low-temperature long-endurance control method. According to the riding environment and ecological conditions, the heating, insulation, charging and discharging processes are intelligently controlled according to the temperature, so that the battery can be used for a long time and is still easy to use after a long time, so that the new battery has a long mileage and the old battery is still easy to use.

[0051] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0052] Reference Figure 1 The present application provides an intelligent low-temperature long-range control method for an electric vehicle, comprising the following steps:

[0053] 102. Obtain the current temperature of the environment where the electric vehicle is located in real time;

[0054] 104, in response to the current temperature of the environment being less than a first preset temperature threshold, keeping the battery warm and heating it according to the current temperature of the environment;

[0055] 106. Determine a charge and discharge current of the battery according to a current temperature of the battery, and control operation of the battery according to the charge and discharge current of the battery.

[0056] Specifically, in this embodiment, the control unit MCU intelligently controls the battery incubator to keep warm, the battery preheating system to preheat, and intelligently adjusts the battery discharge and charging according to the ambient temperature through ambient temperature acquisition. Solve the problem of low-temperature discharge and charging characteristics of the battery. Temperature acquisition and determination The electric bicycle battery has its own temperature sensing probe. The battery temperature is collected by the temperature sensor on the battery. The battery pack temperature is then calculated by the digital temperature sensor chip and summarized to the BMS module to interact the execution information with the mobile phone APP and the instrument. After the battery incubator is intelligently controlled by the mobile phone smart APP or manual control, the information is given to the BMS, and the current temperature is determined to give the voltage-stabilizing stepper motor working signal, and the intelligent control covers the incubator or opens the incubator. After the battery preheating system control receives the BMS instruction, it starts three heating schemes; the first is solar panel auxiliary heating, where the solar panel receives light and converts it into heat / electric energy to heat the heating wire; the second is an AC transformer high-efficiency heating circuit, which uses a DC to AC drive heating machine scheme to generate heat by itself; the third is to use the battery power supply to heat the heating wire. The specific battery preheating system can be seen in the control system below, which will not be introduced in detail here. Intelligent regulation of battery discharge and charging When the electric bicycle needs to be discharged and charged during riding, the automatic or manual mode is adopted. The BMS determines the current battery pack temperature and intelligently determines the reasonable discharge and charging current. Regarding temperature control, this system is connected to a dedicated APP and synchronizes the built-in temperature sensor probe for temperature confirmation and identification.

[0057] After identification, automatic control and manual control modes can be used; in automatic mode, the intelligent module will not start any heating or heat preservation operation according to the current temperature, such as when it is higher than 25℃; if the temperature is between 15℃ and 25℃, the heat preservation mode will be automatically turned on; if the temperature is lower than 0℃, the gradually changing heating mode will be turned on according to the temperature; the intelligent module will manage the communication of the vehicle starting current and charging current according to the ambient temperature. If it is in the environment of 0℃-15℃, it will be limited to 90% current output start, and the charging current will be limited to 90%; in the environment of -15℃-0℃, it will be limited to 80% current output start, and the charging current will be limited to 80%; in the environment below -15℃, it will be limited to 70% current output start, and the charging current will be limited to 70%; (the above temperatures and proportions are preliminary data, and the content of the present invention includes but is not limited to these data) Manual control mode: the intelligent module will prompt on the instrument and mobile phone APP according to the current temperature information and the recommended treatment plan, and the user can make temperature control choices according to their own needs;

[0058] The insulation solution adopts the intelligent covering / maintaining covering insulation box solution;

[0059] The heating scheme adopts the high-efficiency heating scheme through AC transformer, the auxiliary heating scheme of solar panels and the heating wire covering the battery pack.

[0060] Furthermore, by obtaining the current temperature of the environment where the electric vehicle is located in real time and judging whether the current temperature of the environment is in a low temperature environment, when the current temperature of the environment is less than the first preset temperature threshold, it means that the environment is in a low temperature environment, and the battery is kept warm or heated according to the current temperature of the environment; and according to the current temperature of the battery, the charge and discharge current of the battery is determined, so that the charge and discharge current of the battery can be controlled according to different current temperatures of the environment, so as to extend the service life of the battery. Its beneficial effects: the mileage under low temperature conditions of the riding environment is increased by more than 10% year-on-year; the service life of the battery is increased by more than 10% year-on-year.

[0061] In some embodiments, the step of keeping the battery warm and heating the battery according to the current temperature of the environment includes:

[0062] In response to the current temperature of the environment being greater than a second preset temperature threshold, controlling the cover of the external heat preservation box of the battery to be in a closed state to keep the battery warm;

[0063] In response to the current temperature of the environment being less than a second preset temperature threshold, a plurality of control modes are used to control the internal heating component of the external insulation box of the battery to be in an on state to heat the battery.

[0064] Specifically, the second preset temperature threshold can be 15 degrees Celsius. When the current ambient temperature is greater than 15 degrees Celsius, the temperature of the battery is moderate and the battery can be kept warm without heating. The control system can also control the lid of the insulation box outside the battery to be in a closed state, so that the insulation box can keep the battery warm. When the ambient temperature is less than 15 degrees Celsius, the viscosity of the electrolyte inside the battery increases, causing the battery to release current and charge current capabilities to decrease. Therefore, when the ambient temperature is less than 15 degrees Celsius, the heating component inside the insulation box outside the battery is controlled to heat the battery. The heating element inside the insulation box can be a heating wire. In this way, heating the battery can ensure the viscosity of the battery's electrolyte, ensure that the battery can release and charge electricity, and avoid a decrease in battery capacity.

[0065] In some embodiments, the separate power supply control mode includes: a solar panel power supply control mode, an AC transformer power supply control mode, and a battery power supply control mode;

[0066] The method of controlling the internal heating component of the external insulation box of the battery to be in an on state to heat the battery by using a separate power supply control method includes:

[0067] In response to the normal operation of the solar panel power supply control mode, the solar panel power supply control mode is used to power the incubator, so that the heating component inside the incubator is turned on to heat the battery;

[0068] In response to abnormal operation of the solar panel power supply control mode, an AC transformer power supply control mode or a battery power supply control mode is used to power the incubator, so that the internal heating component of the incubator is turned on to heat the battery.

[0069] Specifically, when the solar panel power supply mode cannot operate normally, it means that there is no sun outside and the solar preheating submodule cannot preheat. The solar panel cannot obtain heat energy and convert it into electrical energy, which is fed back to the smart BMS. The smart BMS sends different heating schemes based on the received feedback instructions. That is, when the solar panel power supply mode operates abnormally, an AC transformer power supply control mode signal or a battery power supply control mode signal is sent to heat the battery. It can also be understood as follows: when the intelligent BMS receives a command signal that requires heating of the battery pack, it outputs a signal to the first electronic controller to start the solar panel auxiliary heating circuit: the power from the reflective concentrator to the solar panel is used to heat the battery through the resistance heating wire around the battery; the first electronic controller promptly feeds back the current light and temperature information to the intelligent BMS, and the intelligent BMS determines whether to start the second heating scheme; when the intelligent BMS receives a predetermined second command signal that requires heating of the battery pack, it outputs a signal to the second electronic controller to start the AC transformer high-efficiency heating circuit: one end of the secondary side of the transformer is connected to the positive electrode of the power battery, and the other end of the secondary side of the transformer is connected to the positive electrode of the high-voltage busbar of the motor control circuit, and the turns ratio of the primary side of the transformer to the secondary side of the transformer is greater than 1; The negative pole of the power battery is connected to the negative pole of the high-voltage bus of the motor control circuit; one end of the primary side of the transformer is connected to one end of the on-off switch, and the other end of the on-off switch and the other end of the primary side of the transformer are connected to the output end of the motor control circuit, and the heat generated by the transformer is used to heat the battery; the second electronic controller promptly feeds back the current heating amount and temperature information to the intelligent BMS, and the intelligent BMS determines whether to start the third heating scheme; when the intelligent BMS receives the predetermined third instruction signal that the battery pack needs to be heated, it outputs a signal to the first electronic controller to start the direct heating circuit of the battery: the battery voltage is used to heat the battery through the resistance heating wire around the battery; the third electronic controller promptly feeds back the current temperature information to the intelligent BMS, and the intelligent BMS outputs an instruction to shut down.

[0070] In some embodiments, determining the charging and discharging current of the battery according to the current temperature of the battery includes:

[0071] In response to the current temperature of the environment being within a first temperature range, searching a preset rule table for a first current limit value corresponding to the current temperature of the battery, and using the first current limit value as the charging and discharging current of the battery;

[0072] In response to the current temperature of the battery being within a second temperature range, searching a preset rule table for a second current limit value corresponding to the current temperature of the battery, and using the second current limit value as the charging and discharging current of the battery;

[0073] In response to the current temperature of the battery being within a third temperature range, searching a preset rule table for a third current limit value corresponding to the current temperature of the battery, and using the third current limit value as the charging and discharging current of the battery;

[0074] In response to the current temperature of the battery being within a fourth temperature range, a fourth current limiting value corresponding to the current temperature of the battery is searched in a preset rule table, and the fourth current limiting value is used as the charging and discharging current of the battery.

[0075] Specifically: the preset rule table includes multiple temperature ranges, and each temperature range specifies the corresponding current limit value of the charging and discharging current. Exemplarily, the first temperature range is: above 15°C, and the corresponding current limit value of the charging and discharging current is 100%; the second temperature range is: 0°C-15°C, and the corresponding current limit value of the charging and discharging current is 90%; the third temperature range is: -15°C-0°C, and the corresponding current limit value of the charging and discharging current is 80%; the third temperature range is below -15°C, and the corresponding current limit value of the charging and discharging current is 70%. When the current temperature of the battery is in the first temperature range (above 15°C), the first current limit value (100%) corresponding to the current temperature of the battery is searched in the preset rule table, and the first current limit value is used as the charging and discharging current of the battery, which controls the charging and discharging current of the battery at 100%. When the current temperature of the battery is in the second temperature range (0℃-15℃), the second current limit value (90%) corresponding to the current temperature of the battery is searched in the preset rule table, and the second current limit value is used as the charging and discharging current of the battery, so that the charging and discharging current of the battery is controlled at 90%. When the current temperature of the battery is in the third temperature range (-15℃-0℃), the third current limit value (80%) corresponding to the current temperature of the battery is searched in the preset rule table, and the third current limit value is used as the charging and discharging current of the battery, so that the charging and discharging current of the battery is controlled at 80%. When the current temperature of the battery is in the first temperature range (above-15℃), the first current limit value (70%) corresponding to the current temperature of the battery is searched in the preset rule table, and the first current limit value is used as the charging and discharging current of the battery, so that the charging and discharging current of the battery is controlled at 70%. In this way, in environments with different temperatures, using different charging and discharging currents to control the battery can ensure the service life of the battery and ensure the long battery life of the battery.

[0076] In some embodiments, the method further includes: in response to the current temperature of the environment being greater than a second preset threshold, dissipating heat from the battery.

[0077] Specifically, the second preset threshold is a pre-set determination of a high temperature environment. When the current temperature of the environment is greater than the second preset threshold, it indicates that the environment is in a high temperature environment, and in order to maintain the battery life, the battery is cooled.

[0078] In some embodiments, the heat dissipation of the battery includes:

[0079] The cover of the external heat preservation box of the battery is controlled to open to dissipate heat from the battery.

[0080] Among them, the insulation box outside the battery includes a box body and a box cover, a slide groove 12 is provided at the box cover, a rack 13 is provided adjacent to the slide groove 12, a motor 14 is provided outside the box body, the motor 14 passes through the slide groove 12 and is connected to a gear 15, the gear 15 is meshed with the rack 13 provided in the slide groove 12, wherein the gears 15 are symmetrically arranged inside the box body, a rotating shaft is provided between the two gears 15, and the box cover is wound around the rotating shaft.

[0081] When cooling the battery, the BMS module issues a cooling command. After receiving the cooling command, the motor drives the gear to run on the rack, so that the two gears drive the shaft to rotate, roll up the box cover, and open the box cover. Figure 3 and Figure 4 (shown)

[0082] Furthermore, when the box cover is closed, a magnet 16 is provided on the top of the box body, and a corresponding magnet is provided on the box cover. The magnets attract each other to fix the box cover, thereby achieving a better insulation effect for the thermal insulation box. Specific embodiment:

[0084] Temperature collection and judgment are composed of temperature sensors, digital temperature sensor chips, BMS modules, thermal insulation film bags, actuators, direct heating circuits, AC transformer high-efficiency heating circuits, solar panel auxiliary heating circuits, and Bluetooth APP instruments. To achieve intelligent temperature control, first, the battery temperature is collected by the temperature sensor on the battery pack, and then calculated by the digital temperature sensor chip and summarized in the BMS module to interact with the execution information to the mobile phone APP and instrument. Finally, the mobile phone with the Bluetooth APP instrument can monitor the battery temperature of the electric bicycle in real time.

[0085] First, when the temperature sensor detects that the temperature is in the low temperature area (self-set, such as below 0℃), the digital temperature sensor chip calculates the daily average state of this temperature cycle, and the intelligent summary information is transmitted from the BMS to the mobile phone APP to display the current real-time battery temperature and remind you to turn on the battery heating function. At this time, the battery is covered / remains covered with the insulation box; the internal heating circuit of the battery pack is turned on to preheat the battery, and the preheating plan will give priority to the solar panel auxiliary heating plan. When it is detected that the solar panel is illuminated and available, the solar panel collects solar energy through the heating wire to the battery pack; if the solar panel is not illuminated and unavailable, the AC transformer high-efficiency heating circuit is started, and the battery pack is heated by itself; at the same time, the battery can be powered by the battery to heat the battery pack through the heating wire; after normal riding, the internal heating circuit of the battery pack is turned off, and as the temperature rises to -5℃, the AC transformer high-efficiency heating circuit is turned off; when thermal equilibrium is reached, the solar panel auxiliary heating system is turned off (the battery pack temperature cannot exceed the safe setting temperature).

[0086] Second, when the temperature sensor detects that the temperature is in the high temperature area (independent equipment, such as above 15°C), the digital temperature sensor chip and intelligent summary information are transmitted from the BMS to the mobile phone APP to display the current real-time battery temperature. No other operations are performed and the insulation film bag is opened.

[0087] Third, when the temperature sensor detects that the temperature is in the appropriate temperature area (self-set, such as 0-15℃ range), the digital temperature sensor chip calculates the daily average state of this temperature cycle. The intelligent summary information is transmitted from the BMS to the mobile phone APP to display the current real-time battery temperature and issue a cover / keep cover insulation box instruction.

[0088] When the smart BMS receives the instruction signal to cover the incubator, it will output a signal to the actuator to start the action and cover the previously open incubator cover. If the cover is already in the covered state, the position locator between the incubator cover and the incubator will transmit the signal to the smart BMS through the actuator, and the smart BMS will stop sending the signal to the actuator. Figure 3 and Figure 4 (shown)

[0089] Second, when the intelligent BMS receives the command signal to open the incubator, it outputs a signal to the motor (such as Figure 3 and Figure 4 As shown in the figure, the action starts to open the previously covered incubator cover; if it is already in the open state, the position locator between the incubator cover and the incubator will transmit the signal to the smart BMS through the actuator, and the smart BMS stops sending the signal to the actuator.

[0090] When the smart BMS receives a command signal that requires heating of the battery pack, it outputs a signal to the first electronic controller to start the solar panel auxiliary heating circuit: the power from the reflective concentrator to the solar panel is used to heat the battery through the resistive heating wire around the battery; the first electronic controller also promptly feeds back the current light and temperature information to the smart BMS, which determines whether to start the second heating scheme.

[0091] Second, when the intelligent BMS receives a predetermined second command signal that requires heating of the battery pack, it outputs a signal to the second electronic controller to start the AC transformer high-efficiency heating circuit: one end of the secondary side of the transformer is connected to the positive pole of the power battery, the other end of the secondary side of the transformer is connected to the positive pole of the high-voltage bus of the motor control circuit, and the turns ratio of the primary side of the transformer to the secondary side of the transformer is greater than 1; the negative pole of the power battery is connected to the negative pole of the high-voltage bus of the motor control circuit; one end of the primary side of the transformer is connected to one end of the on-off switch, and the other end of the on-off switch and the other end of the primary side of the transformer are connected to the output end of the motor control circuit, and the heat generated by the transformer is used to heat the battery; the second electronic controller promptly feeds back the current heating amount and temperature information to the intelligent BMS, and the intelligent BMS determines whether to start the third heating scheme.

[0092] Third, when the smart BMS receives the third command signal that requires heating of the battery pack, it outputs a signal to the first electronic controller to start the direct battery heating circuit: the battery voltage is used to heat the battery through the resistance heating wire around the battery; the third electronic controller promptly feeds back the current temperature information to the smart BMS, and the smart BMS outputs a command to shut down.

[0093] The battery discharge control is composed of a BMS module, an intelligent controller, a Bluetooth APP instrument, and a vehicle discharge control button. To achieve intelligent discharge control, there are first intelligent temperature collection and intelligent temperature control. According to the temperature collection status on the mobile phone APP, the information is sent via CAN communication to the BMS module, which transfers the information to the electric bicycle intelligent controller to execute intelligent discharge control. Manual control mode can also be used.

[0094] 1. If the temperature collected by the temperature sensor is above 0℃, the intelligent automatic control current is 100% current output to start; Manual control scheme: When you open the electric door lock and prepare to ride, touch the vehicle discharge button. At this time, the BMS module will collect the current temperature information and feed it back to the controller to directly control the current to 100% discharge;

[0095] 2. If the temperature collected by the temperature sensor is in the environment of -15℃-0℃, the intelligent automatic control current is limited to 90% current output and starts; Manual control scheme: When the electric door lock is opened and ready to ride, touch the vehicle discharge button. At this time, the BMS module will collect the current temperature information, issue a cover / keep cover insulation bag instruction, and heat according to the preheating scheme, and synchronously control the discharge current to 90% output; when the temperature is heated to a certain temperature, the BMS information is fed back to the controller to directly control the current to discharge 100%;

[0096] 3. If the temperature collected by the temperature sensor is below -15 degrees Celsius, the intelligent automatic control current is limited to 80% current output and starts; Manual control scheme: When the electric door lock is opened and ready to ride, touch the vehicle discharge button. At this time, the BMS module will collect the current temperature information, issue a cover / keep cover insulation bag instruction, and heat according to the preheating scheme, and synchronously control the discharge current to 80% output; when the temperature is heated to a certain temperature, the BMS information is fed back to the controller to directly control the current to discharge 100%;

[0097] Second, the battery charging control consists of a BMS module, a smart charger, a Bluetooth APP instrument, and a vehicle discharge control button. To achieve intelligent charging control, there are first intelligent temperature collection and intelligent temperature control. According to the temperature collection status on the mobile phone APP, the information is sent to the BMS module through CAN communication to transfer the information to the electric bicycle smart charger to perform intelligent charging control.

[0098] 1. If the temperature collected by the temperature sensor is above 0℃, the intelligent automatic control current can be charged with 100% charging current, which can be fast charged; Manual control scheme: When the charger wants to charge the whole vehicle, touch the vehicle discharge button, and the BMS module will collect the current temperature information and feed it back to the charger to directly control the current to charge at 100%;

[0099] 2. If the temperature collected by the temperature sensor is in the environment of -15℃-0℃, the intelligent automatic control current limit is 90% current charging + pulse charging + conventional charging + fast charging; Manual control scheme: Touch the vehicle discharge button, then the BMS module will collect the current temperature information, issue a cover / keep cover insulation bag instruction, and heat according to the preheating scheme, and synchronously control the discharge current to 90% output; when the temperature is heated to a certain temperature, the BMS information is fed back to the controller to directly control the current to 100% discharge;

[0100] 3. If the temperature collected by the temperature sensor is below -15℃, the intelligent automatic control current limit is 80% current pre-charge + pulse charge + conventional charge + fast charge; manual control scheme: touch the vehicle discharge button, then the BMS module will collect the current temperature information, issue a cover / keep cover insulation bag instruction, and heat according to the preheating scheme, and synchronously control the discharge current to 80% output; when the temperature is heated to a certain temperature, the BMS information is fed back to the controller to directly control the current to 100% discharge. (For details, see the attached Figure 2 )

[0101] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the described method.

[0102] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0103] Based on the same inventive concept, corresponding to any of the above embodiments and methods, Figure 5 As shown, the present application also provides an electric vehicle intelligent low temperature long endurance control system, comprising:

[0104] The temperature collection subsystem 202 is used to collect the current temperature of the environment;

[0105] The main control system 204 is used to receive the current temperature of the environment collected by the temperature collection system, and generate a battery preheating control instruction and a battery discharge and charge control instruction according to the current temperature of the environment, and send a preheating control signal and a battery charge and discharge control signal;

[0106] The battery preheating subsystem 206 includes a solar preheating submodule, an AC transformer preheating submodule and a battery preheating submodule, wherein the execution levels of the solar preheating submodule, the AC transformer preheating submodule and the battery preheating submodule are successively lowered; and is used to receive the preheating control signal, and heat the battery using the solar preheating submodule, the AC transformer preheating submodule or the battery preheating submodule according to the preheating control signal;

[0107] The battery discharge and charge control subsystem 208 is used to receive the battery charge and discharge control signal of the main control system, and control the battery discharge and charge according to the control instruction based on the received battery charge and discharge control signal of the main control system.

[0108] In some embodiments, Figure 6 As shown, the solar preheating submodule includes a solar preheating circuit, which includes: a reflective concentrator, an optical frequency division duplexer, a crystalline silicon solar cell panel, an amorphous silicon solar cell panel, a first electronic controller and a battery; the reflective concentrator is connected to the input end of the optical frequency division duplexer, and the two output ends of the optical frequency division duplexer are respectively connected to the crystalline silicon solar cell panel and the amorphous silicon solar cell panel, the positive and negative electrodes of the crystalline silicon solar cell panel and the amorphous silicon solar cell panel are both connected to the input end of the electronic controller, and the output end of the first electronic controller is connected to the heating wire in the insulation box outside the battery.

[0109] In some embodiments, Figure 7 As shown, the AC transformer preheating submodule includes an AC transformer preheating circuit, which includes: a power battery, a transformer, and a second electronic controller. One end of the secondary side of the transformer is connected to the positive electrode of the power battery, and the other end is connected to the negative electrode of the high-voltage bus of the second electronic controller. One end of the primary side of the transformer is connected to the first output end of the second electronic control circuit through an on-off switch, and the other end of the primary side of the transformer is connected to the second output end of the second electronic control circuit. The negative electrode of the power battery is connected to the positive electrode of the high-voltage bus of the second electronic control circuit, and the third output end of the second electronic control circuit is connected to the heating wire in the insulation box outside the battery.

[0110] Specifically, the second electronic controller includes a three-phase rectifier circuit. When the intelligent BMS receives a predetermined second command signal that requires heating of the battery pack, it outputs a signal to the second electronic controller to start the AC transformer high-efficiency heating circuit: one end of the secondary side of the transformer is connected to the positive pole of the power battery, the other end of the secondary side of the transformer is connected to the positive pole of the high-voltage bus of the motor control circuit, and the turns ratio of the primary side of the transformer to the secondary side of the transformer is greater than 1; the negative pole of the power battery is connected to the negative pole of the high-voltage bus of the motor control circuit; one end of the primary side of the transformer is connected to one end of the on-off switch, and the other end of the on-off switch and the other end of the primary side of the transformer are connected to the output end of the motor control circuit, and the heat generated by the transformer is used to heat the battery; the second electronic controller promptly feeds back the current heating amount and temperature information to the intelligent BMS, and the intelligent BMS determines whether to start the third heating scheme;

[0111] In some embodiments, Figure 8As shown, the battery preheating submodule includes a battery preheating current, and the battery preheating circuit includes: a switch, a diode, a resistor, and an LED lamp. The switch, diode, resistor, and LED lamp are connected in series, one end is connected to the positive electrode of the battery, and the other end is connected to the negative electrode of the battery, wherein the heating wire is connected in parallel with the switch, diode, resistor, and LED lamp.

[0112] Specifically, when the smart BMS receives the predetermined third command signal that requires heating of the battery pack, it outputs a signal to the first electronic controller to start the direct battery heating circuit: the battery voltage is used to heat the battery through the resistance heating wire around the battery; the third electronic controller promptly feeds back the current temperature information to the smart BMS, and the smart BMS outputs a command to shut down.

[0113] For the convenience of description, the above device is described in terms of functions divided into various modules. Of course, when implementing the present application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0114] The device of the above embodiment is used to implement a corresponding electric vehicle intelligent low-temperature long-endurance control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0115] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, an intelligent low-temperature and long-range control method for an electric vehicle as described in any of the above embodiments is implemented.

[0116] Fig. 9 A more specific schematic diagram of the hardware structure of an electronic device provided in this embodiment is shown, and the device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are connected to each other through the bus 1050 in the device.

[0117] The processor 1010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0118] The memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0119] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured in the device as a component (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0120] The communication interface 1040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through a wired mode (such as USB, network cable, etc.) or a wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0121] The bus 1050 includes a path that transmits information between the various components of the device (eg, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0122] It should be noted that, although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040 and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0123] The electronic device of the above embodiment is used to implement a corresponding electric vehicle intelligent low-temperature long-endurance control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0124] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute an intelligent low-temperature and long-endurance control method for an electric vehicle as described in any of the above embodiments.

[0125] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0126] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute an intelligent low-temperature and long-range control method for an electric vehicle as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0127] Based on the same concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, the computer executes the method described in any of the above embodiments, which has the beneficial effects of the corresponding method embodiments and will not be repeated here.

[0128] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0129] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0130] As an optional but non-limiting implementation, in response to receiving the user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0131] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0132] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0133] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0134] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0135] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. An intelligent low-temperature long-range control method for electric vehicles, characterized in that: include: Get the current temperature of the environment where the electric vehicle is located in real time; In response to the current temperature of the environment being less than a first preset temperature threshold, the battery is kept warm and heated according to the current temperature of the environment; The charging and discharging current of the battery is determined according to the current temperature of the battery, and the operation of the battery is controlled according to the charging and discharging current of the battery.

2. The method according to claim 1, characterized in that The step of keeping the battery warm and heating the battery according to the current temperature of the environment includes: In response to the current temperature of the environment being greater than a second preset temperature threshold, controlling the cover of the external heat preservation box of the battery to be in a closed state to keep the battery warm; In response to the current temperature of the environment being less than a second preset temperature threshold, a plurality of control modes are used to control the internal heating component of the external insulation box of the battery to be in an on state to heat the battery.

3. The method according to claim 1, characterized in that: The separate power supply control mode includes: solar panel power supply control mode, AC transformer power supply control mode and battery power supply control mode; The method of controlling the internal heating component of the external insulation box of the battery to be in an on state to heat the battery by using a separate power supply control method includes: In response to the normal operation of the solar panel power supply control mode, the solar panel power supply control mode is used to power the incubator, so that the heating component inside the incubator is turned on to heat the battery; In response to abnormal operation of the solar panel power supply control mode, an AC transformer power supply control mode or a battery power supply control mode is used to power the incubator, so that the internal heating component of the incubator is turned on to heat the battery.

4. The method according to claim 1, characterized in that Determining the charging and discharging current of the battery according to the current temperature of the battery includes: In response to the current temperature of the environment being within a first temperature range, searching a preset rule table for a first current limit value corresponding to the current temperature of the battery, and using the first current limit value as the charging and discharging current of the battery; In response to the current temperature of the battery being within a second temperature range, searching a preset rule table for a second current limit value corresponding to the current temperature of the battery, and using the second current limit value as the charging and discharging current of the battery; In response to the current temperature of the battery being within a third temperature range, searching a preset rule table for a third current limit value corresponding to the current temperature of the battery, and using the third current limit value as the charging and discharging current of the battery; In response to the current temperature of the battery being within a fourth temperature range, a fourth current limiting value corresponding to the current temperature of the battery is searched in a preset rule table, and the fourth current limiting value is used as the charging and discharging current of the battery.

5. The method according to claim 1, characterized in that Also includes: In response to the current temperature of the environment being greater than a second preset threshold, the battery is cooled.

6. The method according to claim 1, characterized in that The heat dissipation of the battery comprises: The cover of the external heat preservation box of the battery is controlled to open to dissipate heat from the battery.

7. An intelligent low-temperature long-range control system for electric vehicles, characterized in that: include: Temperature collection subsystem, used to collect the current temperature of the environment; A main control system, used to receive the current temperature of the environment collected by the temperature collection system, and generate a battery preheating control instruction and a battery discharge and charge control instruction according to the current temperature of the environment, and send a preheating control signal and a battery charge and discharge control signal; A battery preheating subsystem, comprising a solar preheating submodule, an AC transformer preheating submodule and a battery preheating submodule, wherein the execution levels of the solar preheating submodule, the AC transformer preheating submodule and the battery preheating submodule are successively lowered; and is used to receive the preheating control signal, and heat the battery using the solar preheating submodule, the AC transformer preheating submodule or the battery preheating submodule according to the preheating control signal; The battery discharge and charge control subsystem is used to receive the battery charge and discharge control signal of the main control system, and control the battery discharge and charge according to the control instruction based on the received battery charge and discharge control signal of the main control system.

8. The system according to claim 7, characterized in that The solar preheating submodule includes a solar preheating circuit, which includes: a reflective concentrator, an optical frequency division duplexer, a crystalline silicon solar panel, an amorphous silicon solar panel, a first electronic controller and a battery; the reflective concentrator is connected to the input end of the optical frequency division duplexer, two output ends of the optical frequency division duplexer are respectively connected to the crystalline silicon solar panel and the amorphous silicon solar panel, the positive and negative electrodes of the crystalline silicon solar panel and the amorphous silicon solar panel are both connected to the input end of the electronic controller, and the output end of the first electronic controller is connected to the heating wire in the insulation box outside the battery.

9. The system according to claim 7, characterized in that The AC transformer preheating submodule includes an AC transformer preheating circuit, which includes: a power battery, a transformer, and a second electronic controller. One end of the secondary side of the transformer is connected to the positive electrode of the power battery, and the other end is connected to the negative electrode of the high-voltage bus of the second electronic controller. One end of the primary side of the transformer is connected to the first output end of the second electronic control circuit through an on-off switch, and the other end of the primary side of the transformer is connected to the second output end of the second electronic control circuit. The negative electrode of the power battery is connected to the positive electrode of the high-voltage bus of the second electronic control circuit, and the third output end of the second electronic control circuit is connected to the heating wire in the insulation box outside the battery.

10. The system according to claim 7, characterized in that The battery preheating submodule includes a battery preheating current, and the battery preheating circuit includes: a switch, a diode, a resistor, and an LED lamp. The switch, diode, resistor, and LED lamp are connected in series, one end is connected to the positive electrode of the battery, and the other end is connected to the negative electrode of the battery, wherein the heating wire is connected in parallel with the switch, diode, resistor, and LED lamp.

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