Vehicle starting method, device and equipment and computer readable storage medium

Abstract

The invention provides a vehicle starting method, device and equipment and a storage medium, and the starting method comprises the steps: obtaining an electric quantity value and a battery cell temperature of a power battery under the condition that a vehicle wake-up signal is received; if the electric quantity value is within the preset electric quantity value range and the battery cell temperature is within the preset battery cell temperature range, vehicle starting is limited, and a range extender is started for power generation; determining target heating power according to the actual power generation power of the range extender and the actual discharge power of the power battery; the power battery is heated according to the target heating power, so that the temperature of the battery cell rises; and if the battery cell temperature is larger than a first preset battery cell temperature threshold value, the vehicle is started. By applying the scheme, the problem that the vehicle cannot be started in an extreme low-temperature environment can be solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle starting method, device, equipment and computer-readable storage medium. Background Art

[0002] In the related art, under extremely low temperature conditions, for example, if the outdoor environment is below -30°C, after the vehicle has been stationary in the outdoor environment for a long time, the discharge capacity of the power battery will be limited to a certain extent, and the power output of the power battery will be small, unable to provide the vehicle with sufficient driving power required for starting, resulting in the vehicle being unable to start.

[0003] Application Contents

[0004] In view of the above problems, the present application provides a vehicle starting method, device, equipment and storage medium, which are used to solve the problem in the related art that the power battery cannot output sufficient driving power and cannot start the vehicle in an extremely low temperature environment.

[0005] According to a first aspect of an embodiment of the present application, a vehicle starting method is provided, the starting method comprising: upon receiving a vehicle wake-up signal, obtaining a power value and a battery cell temperature of a power battery; if the power value is within a preset power value range and the battery cell temperature is within a preset battery cell temperature range, restricting the vehicle from starting and starting a range extender to generate electricity; determining a target heating power according to an actual power generation power of the range extender and an actual discharge power of the power battery; heating the power battery according to the target heating power to increase the battery cell temperature; and starting the vehicle if the battery cell temperature is greater than a first preset battery cell temperature threshold.

[0006] In an optional manner, the starting method also includes: during the power generation process of the range extender, if it is monitored that the cooling water temperature of the range extender rises to a target temperature, the range extender is controlled to generate power with a target power generation power; wherein the target power generation power is a power determined from a theoretical power generation power, a minimum power generation power and a temperature-controlled power generation power, the theoretical power generation power is the theoretical power consumption required by the current vehicle, the minimum power generation power is the minimum end value of a preset power generation power threshold interval of the range extender, and the temperature-controlled power generation power is the preset power generation power corresponding to the cooling water temperature.

[0007] In an optional manner, the starting method also includes: obtaining the battery charging power based on the difference between the maximum charging power threshold of the battery cell, the first battery cell temperature difference and the end value of the charging temperature threshold interval; wherein the first battery cell temperature difference is obtained based on the battery cell temperature and the minimum charging temperature threshold of the battery cell, and the minimum charging temperature threshold of the battery cell is the minimum end value of the charging temperature threshold interval; obtaining the theoretical power generation power based on the battery charging power, DC output power, preset heating power and safety deviation value.

[0008] In an optional manner, the startup method also includes: obtaining the temperature-controlled power generation power based on the minimum power generation power, the difference between the end values ​​of the preset power generation power threshold interval, the difference between the end values ​​of the preset cooling water temperature threshold interval and the first cooling water temperature difference; wherein, the first cooling water temperature difference is obtained based on the cooling water temperature and the minimum cooling water temperature threshold, and the minimum cooling water temperature threshold is the minimum end value of the preset cooling water temperature threshold interval.

[0009] In an optional manner, determining the target heating power based on the actual power generation power of the range extender and the actual discharge power of the power battery includes: summing the actual power generation power of the range extender and the actual discharge power of the power battery to obtain the target discharge power; if the target discharge power is less than a preset low power threshold, determining the preset heating power as the target heating power; wherein the preset low power threshold is the minimum end value of the preset power threshold range.

[0010] In an optional manner, the starting method also includes: if the target discharge power is greater than the preset low power threshold and less than the preset high power threshold, determining the target heating power according to the battery cell temperature; wherein the preset high power threshold is the maximum end value of the preset power threshold range; heating the power battery according to the target heating power, including: subtracting the target discharge power from the target heating power to obtain the cabin heating power; heating the power battery according to the target heating power block and displaying the target heating time, and heating the cabin according to the cabin heating power.

[0011] In an optional manner, after obtaining the power battery's charge value and battery cell temperature when a vehicle wake-up signal is received, the method further includes: if the power battery's charge value is greater than the preset power threshold and the battery cell temperature is within the preset battery cell temperature range, restricting the vehicle from starting; determining the target heating power according to the battery cell temperature, and heating the power battery according to the target heating power to increase the battery cell temperature; and starting the vehicle if the battery cell temperature is greater than the first preset battery cell temperature threshold.

[0012] According to a second aspect of an embodiment of the present application, a vehicle starting device is provided, the starting device comprising: an acquisition module, which acquires the power value and the battery cell temperature of a power battery when a vehicle wake-up signal is received; a restriction module, which restricts the starting of the vehicle and starts the range extender to generate electricity if the power value is within a preset power value range and the battery cell temperature is within a preset battery cell temperature range; a determination module, which determines a target heating power according to an actual power generation power of the range extender and an actual discharge power of the power battery; a heating module, which heats the power battery according to the target heating power to increase the battery cell temperature; and a starting module, which starts the vehicle if the battery cell temperature is greater than a first preset battery cell temperature threshold.

[0013] According to a third aspect of an embodiment of the present application, an electronic device is provided, comprising: a controller; a memory storing one or more programs, wherein when the one or more programs are executed by the controller, the controller implements the following operations of the starting method: upon receiving a vehicle wake-up signal, obtaining the power value and the battery cell temperature of the power battery; if the power value is within a preset power value range and the battery cell temperature is within a preset battery cell temperature range, restricting the vehicle from starting, and starting the range extender to generate electricity; determining a target heating power according to the actual power generation power of the range extender and the actual discharge power of the power battery; heating the power battery according to the target heating power to increase the battery cell temperature; and starting the vehicle if the battery cell temperature is greater than a first preset battery cell temperature threshold.

[0014] According to a fourth aspect of an embodiment of the present application, a computer-readable storage medium is provided, wherein a computer program is stored in the storage medium, wherein the computer program includes at least one executable instruction, and when the executable instruction is executed on a starting device / equipment, the starting device / equipment performs the following operations of the starting method: upon receiving a vehicle wake-up signal, obtaining a power value and a cell temperature of a power battery; if the power value is within a preset power value range and the cell temperature is within a preset cell temperature range, restricting the starting of the vehicle and starting a range extender to generate electricity; determining a target heating power according to an actual power generation power of the range extender and an actual discharge power of the power battery; heating the power battery according to the target heating power to increase the cell temperature; and starting the vehicle if the cell temperature is greater than a first preset cell temperature threshold.

[0015] In the embodiment of the present application, when a vehicle wake-up signal is received, the power value and the cell temperature of the power battery are obtained. If the power value is within a preset power value range and the cell temperature is within a preset cell temperature range, the range extender is started and power is generated to replenish the power of the power battery, improve the discharge capacity of the power battery, and enable the power battery to obtain a sufficient power value to output the first heating power and drive the vehicle; the starting of the vehicle is restricted to further ensure the discharge capacity of the power battery, so that the power battery can output sufficient target heating power to heat the power battery; the target heating power is determined according to the actual power generation power of the range extender and the actual discharge power of the power battery, so that the power battery can be heated according to the target heating power, so that the temperature of the power battery rises, so that the power battery outputs sufficient driving power to drive the vehicle and outputs the first heating power to the PTC system for heating; if the cell temperature of the power battery is greater than the first preset cell temperature threshold, it means that the discharge capacity of the power battery has recovered, and sufficient discharge power can be output for driving the vehicle and heating, so the vehicle can be started, which solves the problem in the related art that the power battery cannot output sufficient driving power and cannot start the vehicle in an extreme low temperature environment.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of an implementation environment involved in this application.

[0019] Figure 2 A flow chart of a vehicle starting method shown in an exemplary embodiment of the present application is shown.

[0020] Figure 3 A flow chart of another vehicle starting method according to an exemplary embodiment of the present application is shown.

[0021] Figure 4 A flow chart of another vehicle starting method according to an exemplary embodiment of the present application is shown.

[0022] Figure 5 A flow chart of another vehicle starting method according to an exemplary embodiment of the present application is shown.

[0023] Figure 6A flow chart of another vehicle starting method according to an exemplary embodiment of the present application is shown.

[0024] Figure 7 A flow chart of another vehicle starting method according to an exemplary embodiment of the present application is shown.

[0025] Figure 8 A schematic structural diagram of an embodiment of a starting device for a vehicle is shown in an exemplary embodiment of the present application.

[0026] Fig. 9 A schematic structural diagram of an embodiment of an electronic device shown in an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0027] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0028] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0029] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0030] The term "multiple" as used in this application refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0031] In the related art, if a vehicle enters an extremely low temperature environment, for example, if the outdoor environment is below -30°C, after the vehicle has been stationary in the outdoor environment for a long time, the viscosity of the electrolyte inside the power battery will increase and the fluidity will deteriorate, which will increase the resistance to the movement of ions in it, resulting in an increase in the ohmic internal resistance; at the same time, the low temperature will also hinder the charge transfer process on the electrode surface and increase the polarization internal resistance of the electrode reaction. The combined effect of these two factors significantly increases the overall internal resistance of the power battery. During the discharge process of the power battery, the voltage drop between the overall internal resistance is greater, and the power that the power battery can provide to the outside is smaller, which cannot provide the vehicle with sufficient driving power required for starting, resulting in the vehicle being unable to start.

[0032] See also Figure 1 , Figure 1 It is a schematic diagram of an implementation environment involved in this application. Figure 1The implementation environment shown is specifically a vehicle starting system, including: a controller 110, a range extender 120, a power battery 130, a PTC system 140, a cockpit 150 and a large vehicle display screen 160; the controller 110 can control the start of the range extender 120 according to the warm-up power. After the range extender 120 is started, the cooling water temperature of the cooling water in the range extender 120 will rise. According to the cooling water temperature, it can be determined whether the range extender 120 has been warmed up. When the range extender 120 runs at the warm-up power, it will also generate electricity at a certain power. If the cooling water temperature rises to the target temperature, it means that the range extender 120 has been warmed up, and the warm-up power is switched to the target power generation power to control the range extender 120 to generate electricity. After warming up, the power generated by the range extender 120 can be better; while the range extender 120 is generating electricity, the controller 110 can control the PTC system 140 to heat the power battery 130 according to the target heating power, so that the battery cell temperature of the power battery 130 rises. If the battery cell temperature rises to the first preset battery cell temperature threshold, it means that the power battery 130 can output sufficient driving power to start the vehicle; and during the process of the battery cell temperature of the power battery 130 rising, the heating power output by the power battery will also increase. In addition to ensuring the target heating power of the PTC system 140 to the power battery 130, the PTC system 140 can also be controlled to heat the cabin 150 with a certain cabin power. The vehicle-mounted large display screen 160 may display a vehicle startup prohibition prompt message when the power battery 130 is in an extremely low power state and in an extremely low temperature state; or after a preset heating period, the battery cell temperature is still less than the first preset battery cell temperature threshold and the extremely low temperature mode is exited; or when the range extender fails to start, the vehicle startup prohibition prompt message may be displayed. For example, the prompt message may be: The power battery temperature is low, please contact the user center. The vehicle-mounted large display screen 160 may also display a prompt message: The power battery is being heated, and the target heating time is calculated by the PTC heating power and the battery pack characteristics when the power value is within the preset power value range and the battery cell temperature is within the preset battery cell temperature range. In some embodiments of the present application, the PTC system 140 includes a first PTC module 141 and a second PTC module 142, the first PTC module 141 and the second PTC module 142 can be independently controlled, the first PTC module 141 can be attached to the surface of the power battery 130, the controller 110 can control the first PTC module 141 to heat the power battery 130 according to the target heating power, the second PTC module 142 is connected to the cabin 150, and the controller 110 can also control the second PTC module 142 to heat the cabin 150. In some embodiments of the present application, the PTC system includes a first PTC module 141, the first PTC module 141 is connected to the power battery 130 and the cabin 150, respectively, and the controller 110 can control the first PTC module 141 to heat the power battery 130 and the cabin 150, respectively.

[0033] Figure 2A flowchart of a vehicle startup method shown in an exemplary embodiment of the present application is shown. The startup method is executed by a vehicle controller, and the startup method at least includes S210 to S240, which are described in detail as follows:

[0034] S210: When a vehicle wake-up signal is received, the power value and the battery cell temperature of the power battery are obtained.

[0035] Among them, the vehicle wake-up signal is a signal that can put the vehicle in a wake-up state. The vehicle wake-up signal can be a remote sensing key signal, a mechanical key insertion signal, a door opening signal, and a seat pressure sensor signal, etc. If the vehicle receives the vehicle wake-up signal, the power value and the cell temperature of the power battery are detected. When the power value is extremely low and under an extremely low temperature state, the power battery is controlled to output the discharge power to start the vehicle, which may damage the power battery. By obtaining the power value and cell temperature of the power battery, it is determined whether the power value of the power battery is within the preset power value range and whether the cell temperature is within the preset cell temperature range to determine whether the vehicle can be started.

[0036] S220: If the power value is within a preset power value range and the battery cell temperature is within a preset battery cell temperature range, the vehicle is restricted from starting and the range extender is started to generate electricity.

[0037] Among them, if the power value of the power battery is within the preset power value range, and the battery cell temperature is within the preset battery cell temperature range, it means that the current state of the vehicle can realize starting the vehicle without damaging the power battery. The range extender is started to generate electricity so that the power of the power battery can be supplemented, so that the power battery obtains sufficient power value to output driving power to start the vehicle and output heating power for heating. By limiting the start of the vehicle, the power consumed by the power battery when the vehicle is started can be limited. For example, the vehicle can be prohibited from outputting driving power and\or prohibiting the vehicle from shifting gears. The driving power is the power used to drive the vehicle. The first heating power is an electric power. When the power value of the vehicle power battery is greater than the maximum end value of the preset power value range and the battery cell temperature is greater than the maximum end value of the preset battery cell temperature range, that is, the vehicle is in a normal temperature environment and the power battery is fully charged, the PTC system performs work with the first heating power to generate heat energy, which is used to heat the power battery and / or the cabin, etc.; by prohibiting the start of the vehicle, the power battery can output sufficient target heating power to heat the power battery. Exemplarily, the preset power value range may be between 30% and 40% of the full power value, and the preset battery cell temperature range may be between -40°C and -30°C; if the power value of the power battery is less than 30%, it is determined that the power battery is in an extremely low power state; if the battery cell temperature is less than -40°C, it is determined that the power battery is in an extremely low temperature state. If the power battery is in an extremely low power state and an extremely low temperature state, the vehicle-mounted display screen is controlled to display a prompt message prohibiting the vehicle from starting, and after a preset delay period, the vehicle is controlled to power off to protect the power battery. Exemplarily, the prompt message may be: The power battery temperature is low, please contact the user center. The preset delay period may be 10S.

[0038] If the power value is within the preset power value range and the battery cell temperature is within the preset battery cell temperature range, the vehicle display screen is controlled to display a prompt message: the power battery is being heated, and the target heating time is calculated based on the PTC heating power and battery pack characteristics. The prompt message is displayed to inform the user that the vehicle is in the process of power battery heating.

[0039] If the range extender fails to start, the vehicle display screen is controlled to display a message prohibiting the vehicle from starting, and after a preset delay period, the vehicle is powered off to protect the power battery. For example, the prompt message may be: The power battery temperature is low, please contact the user center. By displaying the prompt message, the user is informed of the reason for the vehicle starting failure.

[0040] S230: Determine a target heating power according to the actual power generation power of the range extender and the actual discharge power of the power battery.

[0041] Among them, the actual power generation power of the range extender indicates the actual power value generated by the range extender during operation, and the actual discharge power of the power battery indicates the discharge capacity of the power battery under the current temperature environment; by summing the actual power generation power of the range extender and the actual discharge power of the power battery, the target heating power that can be used to heat the power battery is determined based on the power value obtained by the summation. Since the first heating power is the normal heating power output by the vehicle when the power battery is fully charged and the battery cell temperature is normal, and the target heating power is the limited heating power when the power battery value is extremely low and the battery cell temperature is at an extremely low temperature, the first heating power is greater than the target heating power.

[0042] S240: Heating the power battery according to the target heating power to increase the temperature of the battery cell.

[0043] Among them, a PTC system can be used to heat the power battery according to the target heating power. Exemplarily, the PTC system includes a first PTC module, and the first PTC module is attached to the surface of the power battery. If the first PTC module is heated with the target heating power, the output heat energy can be transferred to the power battery, thereby heating the power battery and increasing the temperature of the battery cell.

[0044] S250: If the battery cell temperature is greater than a first preset battery cell temperature threshold, start the vehicle.

[0045] Among them, if the battery cell temperature is greater than the first preset battery cell temperature threshold, for example, if the battery cell temperature is greater than -28°C, it means that the discharge capacity of the power battery has recovered and can output sufficient discharge power to drive the vehicle and heat the vehicle. The PTC system can heat with the first heating power, that is, the PTC system can be controlled to heat the power battery and the cabin according to user needs, and the power battery can output driving power to start the vehicle, then the vehicle is started to meet the user's vehicle needs.

[0046] By obtaining the power value and cell temperature of the power battery when receiving a vehicle wake-up signal, if the power value is within a preset power value range and the cell temperature is within a preset cell temperature range, the range extender is started and power is generated to replenish the power of the power battery, improve the discharge capacity of the power battery, and enable the power battery to obtain a sufficient power value to output the first heating power and drive the vehicle; limiting the starting of the vehicle to further ensure the discharge capacity of the power battery so that the power battery can output sufficient target heating power to heat the power battery; determining the size of the target heating power according to the actual power generation power of the range extender and the actual discharge power of the power battery, so that the power battery can be heated according to the target heating power, so that the temperature of the power battery rises, so that the power battery outputs sufficient driving power to drive the vehicle and outputs the first heating power to the PTC system for heating; if the power battery cell temperature is greater than the first preset cell temperature threshold, it means that the discharge capacity of the power battery has recovered and can output sufficient discharge power for driving the vehicle and heating, so the vehicle can be started, which solves the problem in the related art that the power battery cannot output sufficient driving power and cannot start the vehicle in an extreme low temperature environment.

[0047] In some other exemplary embodiments of the present application, the starting method also includes: during the power generation process of the range extender, if it is monitored that the cooling water temperature rises to the target temperature, the range extender is controlled to generate power with the target power generation power; the target power generation power is the power determined from the theoretical power generation power, the minimum power generation power and the temperature-controlled power generation power, the theoretical power generation power is the theoretical power required by the current vehicle, the minimum power generation power is the minimum end value of the preset power generation power threshold interval of the range extender, and the temperature-controlled power generation power is the preset power generation power corresponding to the cooling water temperature.

[0048] Among them, after the range extender is started, it runs at the warm-up power and warms up first. During the warm-up process of the range extender, it also outputs power generation. If the cooling water temperature rises to the target temperature, the range extender is controlled to generate power at the target power. The target power generation is greater than the warm-up power. Running at the target power can quickly charge the power battery, and the target heating power for heating the power battery can be increased to achieve rapid heating of the power battery. The theoretical power generation can include: the battery charging power for replenishing the power battery, the preset heating power for heating the power battery, and the DC output power required to be output by the DC output module. The cooling water temperature of the range extender limits the power that the range extender can generate. At different cooling water temperatures, the actual power generation that the range extender can generate is different. The range extender is controlled to generate power according to the warm-up power. If the cooling water temperature rises to the target temperature, the warm-up power is switched to the target power generation power to increase the actual power generation of the range extender, and enough power can be generated to charge and heat the power battery.

[0049] For example, Figure 3A flowchart of another vehicle starting method according to an exemplary embodiment of the present application is shown. How to determine the target power generation is described in detail. The starting method at least includes S310 to S320, which are described in detail as follows:

[0050] S310: Compare the theoretical power generation and the minimum power generation, and use the larger power as the initial power generation.

[0051] Among them, the minimum power generation is the minimum power output of the range extender. If the theoretical power generation is less than the minimum power generation, the range extender will generate electricity at the minimum power generation. If the theoretical power generation is greater than the minimum power generation, the range extender will generate electricity at the theoretical power generation. Therefore, the larger of the two powers is used as the initial power generation.

[0052] S320: Compare the initial power generation and the temperature-controlled power generation, and use the smaller power as the target power generation.

[0053] Among them, the power generation power of the range extender is limited by the cooling water temperature. The temperature-controlled power generation power is the maximum power generation power corresponding to the range extender at the cooling water temperature. If the initial power generation power is less than the temperature-controlled power generation power, the initial power generation power can be used as the target power generation power. If the initial power generation power is greater than the temperature-controlled power generation power, it can only generate electricity with the current maximum target power generation of the range extender. Therefore, the smaller of the two powers is used as the target power generation power.

[0054] In other exemplary embodiments of the present application, how to determine the theoretical power generation power is described in detail. Figure 4 A flowchart of another vehicle starting method according to an exemplary embodiment of the present application is shown. The starting method is executed by a vehicle controller. The starting method at least includes S410 to S420, which are described in detail as follows:

[0055] S410: Obtaining the battery charging power according to the difference between the maximum charging power threshold of the battery cell, the first battery cell temperature difference and the end value of the charging temperature threshold interval; wherein, the first battery cell temperature difference is obtained according to the battery cell temperature and the minimum charging temperature threshold of the battery cell, and the minimum charging temperature threshold of the battery cell is the minimum end value of the charging temperature threshold interval.

[0056] The maximum charging power threshold of the battery cell is the power value that can be allowed at the highest temperature of the power battery; the charging temperature threshold range is the temperature range allowed when the power battery is charged; for example, the battery charging power P charge It can be calculated using the following formula:

[0057] P charge =P charge_max (T battery_max -T threshold ) / (Tbattery -T threshold )

[0058] Among them, P charge_max Indicates the maximum charging power threshold of the battery cell;

[0059] T battery_max Indicates the initial charging temperature of the power battery when charging begins, that is, the larger end value of the charging temperature threshold range;

[0060] T threshold Indicates the minimum charging temperature threshold, that is, the minimum end value of the charging temperature threshold range;

[0061] T battery Indicates the battery cell temperature.

[0062] By calculating the first battery cell temperature difference according to the battery cell temperature and the minimum charging temperature threshold of the battery cell, the battery charging power can be calculated according to the difference between the maximum charging power threshold of the battery cell, the first battery cell temperature difference and the end value of the charging temperature threshold interval, thereby determining the theoretical power generation power according to the battery charging power.

[0063] S420: Obtain theoretical power generation power according to the battery charging power, the DC output power, the preset heating power and the safety deviation value.

[0064] Among them, the theoretical power generation power is obtained by summing the battery charging power, DC output power, preset heating power and safety bias value. The safety deviation value is a negative number less than zero. Exemplarily, the safety deviation value can be -0.1KW, which can prevent the calculated theoretical power generation power from being greater than the maximum allowable charging power of the power battery, causing overcharging of the power battery and damaging the power battery.

[0065] In some embodiments of the present application, how to determine the temperature of the temperature-controlled cooling water temperature is described in detail; the starting method also includes: obtaining the temperature-controlled power generation power according to the minimum power generation power, the difference between the end values ​​of the preset power generation power threshold interval, the difference between the end values ​​of the preset cooling water temperature threshold interval and the first cooling water temperature difference; wherein the first cooling water temperature difference is obtained according to the cooling water temperature and the minimum cooling water temperature threshold, and the minimum cooling water temperature threshold is the minimum end value of the preset cooling water temperature threshold interval.

[0066] For example, the temperature-controlled power generation threshold P gen_temp It can be calculated using the following formula:

[0067] P gen_temp =P gen_min +(P gen_max -P gen_min )(T coolant_max

[0068] -Tcoolant_min ) / (T coolant -T coolant_min )

[0069] Among them, P gen_min Indicates the minimum power generation, that is, the minimum end value of the preset power generation threshold range;

[0070] P gen_max Indicates the maximum power generation, that is, the maximum end value of the preset power generation threshold range;

[0071] T coolant_max Indicates the maximum end value of the preset cooling water temperature threshold range;

[0072] T coolant_min Indicates the minimum cooling water temperature threshold, that is, the minimum end value of the preset cooling water temperature threshold range.

[0073] By determining the first cooling water temperature difference based on the cooling water temperature and the minimum cooling water temperature threshold, the temperature-controlled power generation power can be determined based on the minimum power generation power, the difference between the end values ​​of the preset power generation power threshold interval, the preset cooling water temperature difference and the first cooling water temperature difference. The temperature-controlled power generation power is calculated in real time based on the cooling water temperature, so that the target power generation power can be determined based on the temperature-controlled power generation power.

[0074] In some embodiments of the present application, how to determine the target heating power is described in detail. Figure 5 A flowchart of another vehicle starting method according to an exemplary embodiment of the present application is shown. The starting method is executed by a vehicle controller. The target heating power is determined according to the actual power generation power of the range extender and the actual discharge power of the power battery, including S510 to S520, which are described in detail as follows:

[0075] S510: summing the actual power generation power of the range extender and the actual discharge power of the power battery to obtain a target discharge power.

[0076] Among them, the target power generation power is composed of two parts. One part is the actual power generation power actually generated by the range extender, that is, the heating power that can be used for heating in the actual power consumption generated by the range extender; the other part is the actual discharge power released by the power battery. The target discharge power is obtained by summing the power of the two parts. The output power capacity of the whole vehicle can be judged by the target power generation power.

[0077] S520: If the target discharge power is less than the preset low power threshold, determine the preset heating power as the target heating power; wherein the preset low power threshold is the minimum end value of the preset power threshold range.

[0078] Among them, if the target discharge power is less than the preset low power threshold, it means that the discharge capacity of the whole vehicle is weak and the output power is small. For example, if the range extender operates at warm-up power, the power generation capacity of the range extender is weak. Exemplarily, the power generation power of the range extender is less than 10KW, and the actual power generation power output is small. The output power is only used to heat the power battery, and the preset heating power is used as the target heating power to heat the power battery so that the temperature of the power battery rises slowly. Exemplarily, the preset heating power can be 4KW.

[0079] In some embodiments of the present application, how to allocate the target heating power is described in detail. Figure 6 A flowchart of another vehicle starting method according to an exemplary embodiment of the present application is shown. The starting method is executed by a vehicle controller. The starting method at least includes S610 to S630, which are described in detail as follows:

[0080] S610: If the target discharge power is greater than a preset low power threshold and less than a preset high power threshold, the target heating power is determined according to the battery cell temperature; wherein the preset high power threshold is the maximum end value of the preset power threshold range.

[0081] Among them, if the target discharge power is greater than the preset low power threshold and less than the preset high power threshold, it means that the current output discharge power can provide sufficient heating power for the power battery, but is not enough to release other heating power and driving power restrictions to meet the user's other power requirements. The target heating power is determined according to the battery cell temperature so that the power battery can be heated according to the target power and the battery cell temperature of the power battery rises; the target heating power corresponding to the battery cell temperature can be obtained according to the calibration.

[0082] Heating the power battery according to the target heating power includes:

[0083] S620: Subtract the target discharge power from the target heating power to obtain the cabin heating power.

[0084] Among them, in extremely low temperature environments, users also have heating needs. The remaining power in the target discharge power can be used to heat the cabin. The cabin heating power is obtained by subtracting the target discharge power from the target heating power, so that the cabin can be heated according to the cabin heating power while heating the power battery, thereby meeting the user's heating needs in the cabin.

[0085] S630: heating the power battery according to the target heating power and displaying the target heating time, and heating the cabin according to the cabin heating power; wherein the target heating time is determined according to the initial cell temperature of the power battery.

[0086] Among them, the initial cell temperature is the cell temperature obtained when the vehicle receives the vehicle wake-up signal. The target heating time includes the actual heating time and the preset deviation time. The target heating time can be obtained by summing the actual heating time and the preset deviation time. The actual heating time is the time required for the power battery to rise from the initial cell temperature to the first preset cell temperature threshold when heating the power battery. It can be obtained through calibration. The preset deviation time is a margin. Considering the preset deviation time can ensure that after the target heating time, the restrictions on heating power and driving power can be exited, providing users with accurate psychological expectations. By displaying the target heating time, users can know the exact waiting time for vehicle preheating. Table 1 is a table showing the relationship between heating time and initial battery cell temperature. As shown in Table 1, A\B\C\D\E\F\G\H\I\K represents the actual heating time; Y represents the preset deviation time, which can be 10 minutes. The specific size can be set according to actual needs and is not limited here. For example, when the initial battery cell temperature is -40°C, the actual heating time can be obtained by calibration as Amin, and the target heating time displayed on the large in-vehicle display is A+Ymin. After obtaining the initial battery cell temperature, the corresponding target heating time is obtained by looking up the table.

[0087] Table 1 Relationship between heating time and initial battery core temperature

[0088] Target heating time / min Initial cell temperature / ℃ Actual heating time / min A+Y -40 A B+Y -39 B C+Y -38 C D+Y -37 D E+Y -36 E F+Y -35 F G+Y -34 G H+Y -33 H I+Y -32 I K+Y -31 K

[0089] In the initial stage of power battery heating, as the target heating power increases with the increase of the power battery cell temperature, the target discharge power also increases accordingly. In the initial stage when the target discharge power is small, the power battery is heated first to meet the heating needs of the power battery. After the target discharge power increases, the cabin is heated to meet the user's heating needs. The electric power is flexibly allocated according to the changes in actual power consumption, which not only meets the heating requests for the power battery, but also meets the heating requests of the user, thereby improving the user experience.

[0090] In some embodiments of the present application, how to start a vehicle under extremely low temperature conditions when the power battery is fully charged is described in detail. Figure 7 FIG. 1 is a flow chart of another vehicle starting method according to an exemplary embodiment of the present application. The starting method is executed by a vehicle controller. Figure 2 After S210, the startup method at least includes S710 to S730, which are described in detail as follows:

[0091] S710: If the power value is greater than the preset power threshold and the battery cell temperature is within the preset battery cell temperature range, restricting the vehicle from starting.

[0092] Among them, the preset power threshold can be the end value of the larger end of the preset power threshold range. For example, the preset power threshold can be 40% of the full power value. When the vehicle wake-up signal is received, the power value of the power battery is greater than the preset power threshold, and the battery cell temperature is within the preset battery cell temperature range, indicating that the power value of the power battery can be used to heat the power battery without starting the range extender to generate electricity to supplement the power value of the power battery. However, the current power battery cell temperature is low, so the vehicle start-up is restricted so that the discharge power output of the power battery can be sufficient for heating the power battery.

[0093] S720: Determine a target heating power according to the battery cell temperature, and heat the power battery according to the target heating power to increase the battery cell temperature.

[0094] The target heating power can be determined according to the cell temperature, that is, the actual state of the power battery. The target heating power corresponding to the cell temperature can be obtained according to calibration. The power battery is heated according to the target heating power to increase the cell temperature.

[0095] S730: If the battery cell temperature is greater than a first preset battery cell temperature threshold, start the vehicle.

[0096] Among them, if the battery cell temperature is greater than the first preset battery cell temperature threshold, it means that the discharge capacity of the power battery has recovered, and the power battery can output sufficient discharge power to drive the vehicle and heat the vehicle. Then, the driving power can be output to drive the vehicle, and the PTC system can be controlled according to user needs to heat the power battery and the cabin, and start the vehicle to meet the user's vehicle needs.

[0097] In some other embodiments of the present application, the power value of the power battery is within a preset power value range, and the battery cell temperature is within a preset battery cell temperature range, including: if the power value of the power battery is greater than or equal to a first preset power threshold, and less than a second preset power threshold, then the battery cell temperature is greater than or equal to the second preset battery cell temperature threshold, and less than a third preset battery cell temperature threshold; if the power value of the power battery is greater than or equal to the second preset power threshold, and less than the third preset power threshold, then the battery cell temperature is greater than or equal to the third preset battery cell temperature threshold, and less than a fourth preset battery cell temperature threshold; wherein the preset power value range is between the first preset power threshold and the third preset power threshold, and the preset battery cell temperature range is between the second preset battery cell temperature threshold and the fourth preset battery cell temperature threshold.

[0098] Since the lower the cell temperature, the weaker the discharge capacity, the higher the power value of the power battery is required, so that the power battery can output sufficient discharge power to heat the power battery according to the target heating power. Exemplarily, the first preset power threshold can be 30% of the full power value, the second preset power threshold can be 35% of the full power value, and the third preset power threshold can be 40% of the full power value; the second preset cell temperature threshold can be -30°C, the third preset cell temperature threshold can be -35°C, and the fourth preset cell temperature threshold can be -40°C. If the power value of the power battery is between 30% and 35% of the full power value, the cell temperature can be between -35°C and -30°C; if the power value of the power battery is between 35% and 40% of the full power value, the cell temperature can be between -35°C and -40°C.

[0099] In some other embodiments of the present application, after the power battery is heated according to the target heating power to increase the battery cell temperature, it also includes: after the preset heating period, if the battery cell temperature is less than the first preset battery cell temperature threshold, then exit the extreme low temperature mode, and control the large screen to display a prompt message prohibiting the vehicle from starting, and after the preset delay period, control the vehicle to power off to protect the power battery. Exemplarily, the prompt message may be: The power battery temperature is low, please contact the user center. The preset delay period may be 10S.

[0100] Figure 8 FIG. 1 shows a schematic diagram of a vehicle starting device according to an exemplary embodiment of the present application. Figure 8 As shown, the starting device 800 includes: an acquisition module 810 , a restriction module 820 , a determination module 830 , a heating module 840 and a release module 850 .

[0101] The acquisition module 810 acquires the power value and the cell temperature of the power battery when receiving the vehicle wake-up signal;

[0102] The limiting module 820 limits the vehicle from starting and starts the range extender to generate electricity if the power value is within a preset power value range and the battery cell temperature is within a preset battery cell temperature range.

[0103] A determination module 830 determines a target heating power according to an actual power generation power of the range extender and an actual discharge power of the power battery;

[0104] The heating module 840 heats the power battery according to the target heating power to increase the temperature of the battery cell.

[0105] The starting module 850 starts the vehicle if the battery cell temperature is greater than a first preset battery cell temperature threshold.

[0106] By obtaining the power value and cell temperature of the power battery when receiving a vehicle wake-up signal, if the power value is within a preset power value range and the cell temperature is within a preset cell temperature range, the range extender is started and power is generated to replenish the power of the power battery, improve the discharge capacity of the power battery, and enable the power battery to obtain a sufficient power value to output the first heating power and drive the vehicle; limiting the starting of the vehicle to further ensure the discharge capacity of the power battery so that the power battery can output sufficient target heating power to heat the power battery; determining the size of the target heating power according to the actual power generation power of the range extender and the actual discharge power of the power battery, so that the power battery can be heated according to the target heating power, so that the temperature of the power battery rises, so that the power battery outputs sufficient driving power to drive the vehicle and outputs the first heating power to the PTC system for heating; if the power battery cell temperature is greater than the first preset cell temperature threshold, it means that the discharge capacity of the power battery has recovered and can output sufficient discharge power for driving the vehicle and heating, so the vehicle can be started, which solves the problem in the related art that the power battery cannot output sufficient driving power and cannot start the vehicle in an extreme low temperature environment.

[0107] The vehicle starting device provided in the above embodiment and the vehicle starting method provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment and will not be repeated here.

[0108] Fig. 9 A structural diagram of an embodiment of an electronic device shown in an exemplary embodiment of the present application is shown, which shows a structural diagram of a computer system suitable for implementing the electronic device of the embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the electronic device.

[0109] See also Fig. 9 As shown, the electronic device includes: a controller; a memory for storing one or more programs, and when the one or more programs are executed by the controller, the above-mentioned vehicle starting method is executed.

[0110] Please continue reading Fig. 9As shown, the computer system 900 of the electronic device includes a central processing unit (CPU) 901, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 902 or the program loaded from the storage part 908 to the random access memory (RAM) 903, such as executing the method in the above embodiment. In RAM 903, various programs and data required for system operation are also stored. CPU 901, ROM 902 and RAM 903 are connected to each other through bus 904. Input / output (I / O) interface 905 is also connected to bus 904.

[0111] The following components are connected to the I / O interface 905: an input section 906 including a keyboard, a mouse, etc.; an output section 907 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage section 908 including a hard disk, etc.; and a communication section 909 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 909 performs communication processing via a network such as the Internet. A drive 910 is also connected to the I / O interface 905 as needed. A removable medium 911, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 910 as needed so that a computer program read therefrom is installed into the storage section 908 as needed.

[0112] The process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 909, and / or installed from the removable medium 911. When the computer program is executed by the central processing unit (CPU) 901, various functions defined in the system of the present application are executed.

[0113] Another aspect of the present application further provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the vehicle startup method described above is implemented. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0114] Another aspect of the present application also provides a computer program product or a computer program, which includes at least one executable instruction, and when the executable instruction is run on a starting device / electronic device of a vehicle, the starting device / electronic device of the vehicle executes the vehicle starting method as described above.

[0115] The executable instructions may be specifically used to cause the vehicle's starting device / electronic device to perform the following operations:

[0116] When a vehicle wake-up signal is received, the power value and cell temperature of the power battery are obtained; if the power value is within a preset power value range and the cell temperature is within a preset cell temperature range, the vehicle start-up is restricted and the range extender is started to generate electricity; the target heating power is determined according to the actual power generation power of the range extender and the actual discharge power of the power battery; the power battery is heated according to the target heating power to increase the cell temperature; if the cell temperature is greater than a first preset cell temperature threshold, the vehicle is started.

[0117] The computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a 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 above. In the present application, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as a part of a carrier wave, wherein a computer-readable computer program is carried. This propagated data signal can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0118] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0119] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0120] According to one aspect of an embodiment of the present application, a computer system is also provided, including a central processing unit (CPU), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) or a program loaded from a storage portion into a random access memory (RAM), such as executing the method in the above embodiment. In RAM, various programs and data required for system operation are also stored. CPU, ROM and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0121] The following components are connected to the I / O interface: an input part including a keyboard, a mouse, etc.; an output part including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage part including a hard disk, etc.; and a communication part including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication part performs communication processing via a network such as the Internet. A drive is also connected to the I / O interface as needed. Removable media, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., are installed on the drive as needed so that the computer program read therefrom is installed into the storage part as needed.

[0122] The above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A method for starting a vehicle, characterized in that: The startup method comprises: When receiving a vehicle wake-up signal, obtain the power value and cell temperature of the power battery; If the power value is within a preset power value range and the battery core temperature is within a preset battery core temperature range, restricting the vehicle from starting and starting the range extender to generate electricity; Determining a target heating power according to the actual power generation power of the range extender and the actual discharge power of the power battery; heating the power battery according to the target heating power so as to increase the temperature of the battery cell; If the battery cell temperature is greater than a first preset battery cell temperature threshold, the vehicle is started.

2. The startup method according to claim 1, characterized in that: The startup method also includes: During the power generation process of the range extender, if it is monitored that the cooling water temperature of the range extender rises to the target temperature, the range extender is controlled to generate power with the target power generation; wherein the target power generation is a power determined from the theoretical power generation, the minimum power generation and the temperature-controlled power generation, the theoretical power generation is the theoretical power required by the current vehicle, the minimum power generation is the minimum end value of the preset power generation threshold interval of the range extender, and the temperature-controlled power generation is the preset power generation corresponding to the cooling water temperature.

3. The startup method according to claim 2, characterized in that: The startup method also includes: The battery charging power is obtained according to the difference between the maximum charging power threshold of the battery cell, the first battery cell temperature difference and the end value of the charging temperature threshold interval; wherein the first battery cell temperature difference is obtained according to the battery cell temperature and the minimum charging temperature threshold of the battery cell, and the minimum charging temperature threshold of the battery cell is the minimum end value of the charging temperature threshold interval; The theoretical power generation power is obtained according to the battery charging power, the DC output power, the preset heating power and the safety deviation value.

4. The startup method according to claim 2, characterized in that: The startup method also includes: The temperature-controlled power generation power is obtained according to the minimum power generation power, the difference between the end values ​​of the preset power generation power threshold interval, the difference between the end values ​​of the preset cooling water temperature threshold interval and the first cooling water temperature difference; wherein, the first cooling water temperature difference is obtained according to the cooling water temperature and the minimum cooling water temperature threshold, and the minimum cooling water temperature threshold is the minimum end value of the preset cooling water temperature threshold interval.

5. The startup method according to claim 1, characterized in that: The determining the target heating power according to the actual power generation power of the range extender and the actual discharge power of the power battery comprises: The actual power generation power of the range extender and the actual discharge power of the power battery are summed to obtain a target discharge power; If the target discharge power is less than the preset low power threshold, the preset heating power is determined as the target heating power; wherein the preset low power threshold is the minimum end value of the preset power threshold range.

6. The startup method according to claim 5, characterized in that: The startup method also includes: If the target discharge power is greater than the preset low power threshold and less than the preset high power threshold, the target heating power is determined according to the battery core temperature; wherein the preset high power threshold is the maximum end value of the preset power threshold range; Heating the power battery according to the target heating power includes: Subtracting the target discharge power from the target heating power to obtain a cabin heating power; The power battery is heated according to the target heating power and a target heating time is displayed, and the cabin is heated according to the cabin heating power; wherein the target heating time is determined according to an initial cell temperature of the power battery.

7. The startup method according to claim 1, characterized in that: After obtaining the power value and the cell temperature of the power battery when the vehicle wake-up signal is received, the method further includes: If the power value is greater than the preset power threshold and the battery cell temperature is within the preset battery cell temperature range, restricting the vehicle from starting; determining the target heating power according to the battery cell temperature, and heating the power battery according to the target heating power to increase the battery cell temperature; If the battery cell temperature is greater than the first preset battery cell temperature threshold, the vehicle is started.

8. A vehicle starting device, characterized in that: The starting device comprises: The acquisition module acquires the power value and cell temperature of the power battery when receiving the vehicle wake-up signal; a restriction module, if the power value is within a preset power value range and the battery cell temperature is within a preset battery cell temperature range, restricting the vehicle from starting and starting the range extender to generate electricity; A determination module, which determines a target heating power according to an actual power generation power of the range extender and an actual discharge power of the power battery; a heating module, heating the power battery according to the target heating power to increase the temperature of the battery cell; A starting module starts the vehicle if the battery cell temperature is greater than a first preset battery cell temperature threshold.

9. An electronic device, characterized in that: include: Controller; A memory stores one or more programs, and when the one or more programs are executed by the controller, the controller implements the startup method described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, which includes at least one executable instruction. When the executable instruction is executed on the startup device / equipment, the startup device / equipment executes the operation of the startup method as described in any one of claims 1 to 7.

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