CN117944479A

CN117944479A - Power battery charging method and device and vehicle

Info

Publication number: CN117944479A
Application number: CN202410108424.3A
Authority: CN
Inventors: 熊正龙
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2024-01-25
Filing date: 2024-01-25
Publication date: 2024-04-30

Abstract

The application provides a power battery charging method, a device and a vehicle, wherein the method is characterized in that the starting mode and the running state of the vehicle are obtained, the relevant running information of a motor is obtained under the condition that the starting mode is cold starting and the running state is idle running, if the relevant running information of the motor meets the preset heating condition, the motor is controlled to charge by taking a first preset power as a power battery through a torque control mode and to heat by taking a second preset power, so that the power charged by the motor as the power battery is smaller than the total power output by the motor, the aim of reducing the power generation efficiency of the motor is achieved, the overcharge of the battery in a low-temperature environment is avoided, the relative movement of the motor and an engine is weakened through reducing the power generation efficiency of the motor, the noise is further reduced, the problem of overlarge noise of a front cabin is solved, in addition, the part of the total power output by the motor except the first preset power can be used for heating, the waste of energy is avoided, and the riding experience of a user is improved.

Description

Power battery charging method and device and vehicle

Technical Field

The present application relates to the field of vehicle control technologies, and in particular, to a method and an apparatus for charging a power battery, and a vehicle.

Background

For a hybrid electric vehicle, when the vehicle is cold started in a low-temperature environment in winter, an engine runs at idle speed, and a motor of the vehicle converts mechanical energy generated by the engine into electric energy for charging a battery of the vehicle.

However, in a low temperature environment, the charging power of the battery is generally limited, and at this time, an overcharge failure of the battery may be caused. Meanwhile, when the vehicle is idling to generate electricity, the noise of the front engine room is overlarge, and NVH (Noise, vibration, harshness, noise, vibration and harshness) feeling of a user is affected.

Disclosure of Invention

In view of the above, the present application is directed to a method and an apparatus for charging a power battery, and a vehicle, which avoid the overcharge failure of the battery and solve the problem that the noise of the front cabin affects the NVH feeling of the user.

In view of the above object, the present application provides a power battery charging method performed by a hybrid controller of a vehicle, the method comprising:

Acquiring a starting mode and an operating state of a vehicle;

acquiring relevant operation information of the motor under the condition that the starting mode is cold starting and the operation state is idle operation;

And if the related operation information of the motor meets the preset heating condition, controlling the motor to charge by taking the first preset power as a power battery through a torque control mode, and heating by taking the second preset power, wherein the second preset power is the difference between the total output power of the motor and the first preset power.

Optionally, the acquiring the starting mode of the vehicle includes:

acquiring the current environment temperature, the air conditioner working state of the vehicle and the high-pressure state of the vehicle;

And if the current ambient temperature is smaller than a preset temperature threshold, the working state of the air conditioner is a non-heating state, and the high-pressure state is high-pressure starting, determining that the starting mode is cold starting.

Optionally, the preset heating conditions include a motor heating condition and a controller heating condition; after the motor related operation information is acquired, the method further comprises:

Judging whether motor information in the motor related operation information meets the motor heating condition or not, and whether motor controller information in the motor related operation information meets the controller heating condition or not;

if yes, determining that the related operation information of the motor meets a preset heating condition.

Optionally, determining whether the motor information in the motor related operation information meets the motor heating condition includes:

If the motor rotating speed in the motor information is in a preset rotating speed range, the target torque is in a preset torque range, the working state is a torque control state, and the motor temperature does not exceed a first preset temperature, the motor information is determined to meet the motor heating condition.

Optionally, determining whether the motor controller information in the motor related operation information meets the controller heating condition includes:

And if the fault level in the motor controller information is smaller than the preset level and the controller temperature does not exceed the second preset temperature, determining that the motor controller information meets the controller heating condition.

Optionally, after the controlling the motor to charge the power battery with the first preset power through the torque control mode, the method further includes:

Re-acquiring relevant operation information of the motor;

and judging whether the new motor related operation information meets a preset heating exit condition, if so, stopping charging by taking the first preset power as a power battery, and stopping heating by taking the second preset power.

Optionally, if the new motor-related operation information satisfies at least one of the following conditions, determining that the new motor-related operation information satisfies the preset heating exit condition:

The motor rotating speed in the new motor related operation information is smaller than a preset rotating speed lower limit or larger than a preset rotating speed upper limit;

the target torque in the new motor related operation information is smaller than a preset torque lower limit or larger than a preset torque upper limit;

The fault level in the new motor related operation information is not less than the preset level;

The motor temperature in the new motor related operation information is greater than a third preset temperature;

the controller temperature in the new motor related operating information is greater than the fourth preset temperature.

Acquiring the current residual electric quantity of the power battery;

And if the current residual electric quantity is larger than a preset electric quantity threshold value, controlling the motor to charge by using a third preset power as a power battery through a torque control mode, wherein the third preset power is smaller than the first preset power.

Re-acquiring the running state of the vehicle;

and if the new running state is non-idle running, controlling the motor to charge the power battery by using the total output power.

Based on the same object, the present application also provides a power battery charging device, the device comprising:

the mode state acquisition module is used for acquiring a starting mode and an operating state of the vehicle;

The motor information acquisition module is used for acquiring relevant operation information of the motor under the condition that the starting mode is cold starting and the operation state is idle operation;

And the motor control module is used for controlling the motor to charge by taking the first preset power as a power battery and heating by taking the second preset power as the difference between the first preset power and the total power output by the motor through the torque control mode if the related operation information of the motor meets the preset heating condition.

Based on the same object, the present application also provides a vehicle comprising:

A memory for storing executable program code;

And a processor for calling and running the executable program code from the memory, so that the vehicle performs the method provided by any of the embodiments of the present application.

As can be seen from the above, according to the power battery charging method provided by the application, by acquiring the starting mode and the running state of the vehicle, under the condition that the starting mode is cold starting and the running state is idle running, the relevant running information of the motor is acquired, if the relevant running information of the motor meets the preset heating condition, the motor is controlled to charge the power battery by using the first preset power through the torque control mode, and the second preset power is used for heating, so that the power of the motor for charging the power battery is smaller than the total power of the motor output, the purpose of reducing the power generation efficiency of the motor is achieved, the overcharge of the battery in a low-temperature environment can be avoided, and the relative movement of the motor and the engine can be reduced, so that the noise is reduced, the problem of overlarge noise of a front cabin is solved, in addition, the part of the total power of the motor output except the first preset power can also be used for heating, the heating energy can be collected for heating the battery pack or the cabin, and the riding experience of a user can be improved while the energy waste is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the present application or related art, the drawings that are required to be used in the description of the embodiments or related art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort to those of ordinary skill in the art.

Fig. 1 is a flowchart of a power battery charging method according to an embodiment of the present application;

FIG. 2 is a flowchart of a method for charging a power battery according to another embodiment of the present application;

Fig. 3 is a schematic structural diagram of a power battery charging device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The present application will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent.

It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used in embodiments of the present application, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Before describing the power battery charging method provided by the embodiment of the application in detail, the technical problem solved by the method is described.

For a hybrid vehicle, in the prior art, when an engine runs at idle speed, a motor converts mechanical energy generated by the engine into electric energy, and the electric energy is used for charging a power battery. However, the charging power of the power battery is generally limited in a low-temperature environment, and an overcharge failure of the battery may be caused in the case where the electric power output from the motor to the power battery is excessively large. In addition, the SOC (State of Charge) of the power battery stops charging after reaching a threshold, but at this time, the engine is still in an idle running State, and the engine cannot be stopped, so that the noise of the front cabin is too loud, and the NVH feeling of the user is affected.

Therefore, in order to solve the above-mentioned problems, the embodiment of the present application provides a power battery charging method, which is suitable for a hybrid vehicle, and can determine whether the related operation information of a motor meets a preset heating condition when the starting mode of the vehicle is cold start and the operation state is idle operation, if yes, the motor is controlled to charge the power battery with a first preset power by a torque control mode, so that the power of the motor for charging the power battery is smaller than the total power of the motor output, thereby achieving the purpose of reducing the power generation efficiency of the motor. And the motor can be controlled to generate heat with the residual power, the residual power is partial power except the first preset power in the total output power, and then the heat generated by the motor heating can be collected through the waste heat recovery system and used for heating a power battery or a cabin, so that energy waste is avoided.

Fig. 1 is a flowchart of a method for charging a power battery according to an embodiment of the present application, which is performed by a motor controller (General Motor Control Unit, GMCU) and other controllers of a vehicle, where the other controllers include, but are not limited to, a hybrid controller (Hybrid Control Unit, HCU), a vehicle controller, and an engine controller.

The power battery charging method provided by the embodiment of the application is suitable for the hybrid electric vehicle comprising an engine, a motor and a power battery. As shown in fig. 1, the method comprises the steps of:

S110, acquiring a starting mode and an operating state of the vehicle.

In the present embodiment, the vehicle may be a hybrid type vehicle including an engine and a motor. The operation state may be acceleration operation, constant speed operation, load operation, idle operation, or the like.

Specifically, the acceleration operation may be that the engine accelerates under increased load, and the engine provides a greater power output to meet the vehicle acceleration demand. The constant speed operation may be a state in which the engine maintains a constant rotation speed under a steady load. Load operation may be a condition in which the engine is operating under an additional load, with the engine providing a greater power output to address the additional load demand.

The idle operation may be a state in which the engine is operated under no load, and when the engine is idle, the accelerator pedal is not depressed, the rotation speed of the engine is low, and only the basic operation is maintained to drive accessory systems of the vehicle, such as a cooling system, a power supply system, etc., to ensure smooth operation of the engine and normal operation of various accessories.

For example, the HCU may send a detection signal to the engine controller to receive a status signal fed back by the engine controller, and determine the operating state based on the status signal.

Or the HCU can also directly detect whether the engine is running, the rotating speed of the engine running and the state of the accelerator pedal, and determine the running state of the engine according to the detected information. For example, if the HCU detects that the engine is running, the rotational speed of the engine is greater than a preset acceleration threshold, and the state of the accelerator pedal is triggered, determining that the running state of the engine is acceleration; or if the engine operation is detected and the state of the accelerator pedal is not triggered, determining that the operation state is idle operation.

The starting mode of the vehicle can be used for describing information such as the ambient temperature, the air conditioner working state and the like when the vehicle is started.

In a specific embodiment, acquiring a start mode of a vehicle includes: acquiring the current environment temperature, the air conditioner working state of the vehicle and the high-pressure state of the vehicle; if the current ambient temperature is smaller than the preset temperature threshold, the air conditioner is in a non-heating state in a working state, and is started in a high-voltage state, the starting mode is determined to be cold starting.

The preset temperature threshold may be a preset critical temperature, such as-5 ℃, representing a low temperature environment. In this embodiment, the HCU may obtain the current ambient temperature through a temperature sensor installed on the vehicle, or may send a temperature request signal to the cloud end through a vehicle machine end in the vehicle, and determine the current ambient temperature according to a result fed back by the cloud end.

The air conditioner operating state may be a heating state or a non-heating state, including but not limited to dehumidification, refrigeration, and ventilation. The high pressure state may be an upper high pressure start or no upper high pressure start. The air conditioner control device can send an air conditioner state request signal and a high-voltage state request signal to the whole vehicle controller, and obtain an air conditioner working state and a high-voltage state according to a feedback result of the whole vehicle controller.

Specifically, if the current ambient temperature is less than the preset temperature threshold, the air conditioner is in a non-heating state in a working state, and the air conditioner is in a high-voltage starting state, the HCU may determine that the starting mode is cold starting.

It should be noted that, based on the current ambient temperature, the air conditioner operating state, and the high-voltage state, the purpose of determining whether the starting mode of the vehicle is cold start is to: if the current ambient temperature is less than the preset temperature threshold, the working state of the air conditioner is in a non-heating state, and the high-voltage state is started at high voltage, the environment where the vehicle is located at the moment is indicated to be a low-temperature environment, the charging power of the power battery is limited, the power of the motor for charging the power battery needs to be limited, and the air conditioner is not started to be heated at the moment, and part of the power output by the motor can be consumed in a mode of controlling the motor to generate heat, so that the effect of reducing the charging power of the motor is achieved while the motor is prevented from being too high in temperature.

S120, acquiring relevant operation information of the motor under the condition that the starting mode is cold starting and the operation state is idle operation.

Specifically, if the starting mode of the vehicle is cold start, it means that the environment where the vehicle is located is a low temperature environment, the charging power of the power battery is limited, the air conditioner is not started to be heated, and part of the power output by the motor can be consumed by controlling the motor to generate heat.

And, when the running state of the vehicle is idle running, the motor may convert mechanical energy generated by the running of the engine into electric energy, and charge the power battery by the converted electric energy.

Therefore, under the condition that the starting mode is cold starting and the running state is idle running, the relevant running information of the motor can be further obtained so as to judge whether the relevant running information of the motor meets the preset heating condition.

Wherein, the motor related operation information may be used to describe the operation condition of the motor, or the motor related operation information may be used to describe the operation condition of the motor controller, or the motor related operation information may be used to describe the operation condition of the motor and the motor controller.

Specifically, the HCU may send an active heating command to GMCU in the case where the start mode is determined to be cold start and the operation state is determined to be idle operation, so that GMCU obtains motor related operation information based on the active heating command.

Illustratively, the HCU may send a communication signal (which may be 1 byte in size) to GMCU every interval set period (e.g., 10 ms). If the HCU needs to send the active heating command to the GMCU, the HCU may set the code in the communication signal to the active heating mode to activate the corresponding code, e.g., 0x1 (Enable ACTIVE HEATING Control), and further send the communication signal to send the communication signal as the active heating command to GMCU. If the HCU does not need to send an active heating command, the HCU may set the code in the communication signal to an active heating mode without activating the corresponding code, such as 0x0 (Disable ACTIVE HEATING Control), and further send the communication signal.

And S130, if the related operation information of the motor meets the preset heating condition, controlling the motor to charge by taking the first preset power as a power battery through a torque control mode, and heating by taking the second preset power, wherein the second preset power is the difference between the total power output by the motor and the first preset power.

The preset heating condition may be a preset precondition for active heating of the motor. For example, the preset heating conditions may include a limit on motor temperature, a limit on motor controller temperature, or a limit on motor torque, among others.

It should be noted that, the purpose of judging whether the motor related operation information satisfies the preset heating condition is to: in this embodiment, in order to reduce the power of the motor for charging the power battery, part of the power in the total power output by the motor may be used for charging the power battery, and the rest of the power may be dissipated by controlling the motor to generate heat, so as to avoid the heat generated under the conditions of higher temperature of the motor or higher temperature of the motor controller, and further cause the faults such as damage to the motor, and further determine whether the related operation information of the motor meets the preset heating condition, so as to ensure that the motor works in a charging and heating manner under the condition of meeting the preset heating condition, and avoid the faults.

Specifically, GMCU may determine whether the motor-related operation information satisfies the preset heating condition, and if the motor-related operation information satisfies the preset heating condition, GMCU may enter the active heating mode.

Specifically, GMCU enters an active heating mode, specifically, the motor is controlled to charge by using a first preset power as a power battery through a torque control mode. The first preset power is smaller than the total output power of the motor.

For example, the HCU may send a torque request to GMCU, where a required torque may be preset in the torque request, and GMCU may further control the motor to operate with the preset required torque under the torque request, output a total power corresponding to the preset required torque, and GMCU may further determine a first preset power according to a preset calibration table, and control the motor to use the first preset power in the total power to charge the power battery.

When GMCU controls the motor to charge the power battery with the first preset power through the torque control mode, GMCU can also control the motor to heat with the second preset power. The second preset power is the other power except the first preset power in the total power output by the motor, namely the residual power.

In this embodiment, in the process of GMCU controlling the motor to generate heat with the residual power, the heat generated by the motor generated by the heat generation of the motor can be recovered by the waste heat recovery device of the vehicle, and the recovered heat can be used for heating the power battery and/or the cabin under the condition that the power battery and/or the cabin have a heating requirement.

In view of the fact that there may be a state where the remaining capacity of the power battery reaches near full power after the motor is controlled to charge with the first preset power as the power battery, in order to reduce the charging rate in the near full power state, optionally, after the motor is controlled to charge with the first preset power as the power battery by the torque control mode, the method further includes:

acquiring the current residual electric quantity of the power battery; and if the current residual electric quantity is larger than the preset electric quantity threshold value, controlling the motor to charge by using a third preset power as a power battery through a torque control mode, wherein the third preset power is smaller than the first preset power.

The preset power threshold may be a value indicating that the remaining power of the power battery reaches a state near full power, for example, 90%.

Specifically, an electric quantity request signal can be sent to the battery management system, and the current residual electric quantity of the power battery can be obtained according to the feedback result of the battery management system.

Further, whether the current residual electric quantity is larger than a preset electric quantity threshold value can be judged, if yes, the motor can be controlled by a preset calibration table to charge by taking third preset power as a power battery, and the rate of charging the power battery by the motor can be reduced by reducing the charging power. For example, GMCU may determine, according to the preset calibration table, a third preset power that is less than the first preset power, and control the motor to charge the power battery with the third preset power.

Through the embodiment, the power of the motor for charging the power battery can be reduced when the residual electric quantity of the power battery reaches a state close to full electricity, so that the purpose of reducing the charging efficiency is achieved, the power battery is protected, and the service life of the power battery is prolonged.

It should be noted that, in the idle running process of the vehicle, there may be a situation that the user controls the accelerator pedal of the vehicle so that the vehicle is no longer in idle running, so as to avoid a situation that the motor is continuously controlled to generate heat and cause the motor to have an excessive temperature in this situation, the running state of the vehicle may be continuously detected, and the active heating mode may be stopped in time.

Optionally, after controlling the motor to charge the power battery with the first preset power through the torque control mode, the method further includes:

Re-acquiring the running state of the vehicle; and if the new running state is non-idle running, controlling the motor to charge the power battery by using the total output power.

Specifically, the HCU may reacquire the running state of the vehicle during the process of controlling the motor to charge the power battery with the first preset power, and if the new running state is the idle running, it is not necessary to generate the heating exit instruction.

If the new running state is non-idle running, it means that the charging power of the power battery is not required to be limited any more, and the charging power of the power battery can be reduced without an active heating mode.

For example, if the HCU needs to send a heating exit command to the GMCU, the HCU may set the code in the communication signal to an active heating mode without activating the corresponding code, such as 0x0 (Disable ACTIVE HEATING Control), and then send the communication signal to send the communication signal as a heating exit command to GMCU. If the HCU does not need to send the heating exit command, the HCU may set the code in the communication signal to the active heating mode to activate the corresponding code, e.g., 0x1 (Enable ACTIVE HEATING Control), and then send the communication signal.

Through the optional implementation manner, when the vehicle starting mode is detected to be switched to the non-cold starting mode, the motor can be stopped to generate heat in time, so that the motor can charge the power battery with all output power, and related component faults caused by the fact that the heating is not stopped in time are avoided.

According to the power battery charging method provided by the application, the starting mode and the running state of the vehicle are obtained, the motor related running information is obtained under the condition that the starting mode is cold starting and the running state is idle running, if the motor related running information meets the preset heating condition, the motor is controlled to charge the power battery by using the first preset power through the torque control mode, and the second preset power is used for heating, so that the power charged by the motor for the power battery is smaller than the total power output by the motor, the purpose of reducing the power generation efficiency of the motor is achieved, the battery overcharge in a low-temperature environment can be avoided, the relative movement connected between the motor and the engine can be weakened by reducing the power generation efficiency of the motor, the noise is further reduced, the problem of overlarge noise of a front engine room is solved, in addition, the part of the total power output by the motor except the first preset power can be used for heating, the heated energy can be collected for heating a battery pack or a cabin, and the riding experience of a user can be improved while the energy waste is avoided.

Fig. 2 is a flowchart of a power battery charging method according to another embodiment of the present application, where the preset heating conditions include a motor heating condition and a controller heating condition on the basis of the foregoing embodiments, and an exemplary description is given of how to determine whether the motor-related operation information satisfies the preset heating condition.

As shown in fig. 2, the method comprises the steps of:

s210, acquiring a starting mode and an operating state of the vehicle.

S220, acquiring relevant operation information of the motor under the condition that the starting mode is cold starting and the operation state is idle operation.

S230, judging whether motor information in motor related operation information meets motor heating conditions or not, and whether motor controller information in motor related operation information meets controller heating conditions or not, if yes, determining that motor related operation information meets preset heating conditions.

Wherein, the motor related operation information may include motor information and motor controller information, and the preset heating condition may include a motor heating condition and a controller heating condition.

The purpose of setting the motor heating conditions and the controller heating conditions is to: whether the motor and the motor controller meet the motor heating condition or not is judged respectively, heating under the condition that the temperature of the motor and the temperature of the motor controller are too high can be avoided simultaneously, heating under the condition that the fault level of the motor controller is too high and the like can be avoided, and the heating safety is ensured.

In a specific embodiment, determining whether motor information in the motor-related operation information satisfies a motor heating condition includes:

The motor information comprises motor rotating speed, target torque, working state and motor temperature. The preset rotating speed range may be a preset rotating speed range capable of entering the active heating mode, and the preset rotating speed range may be obtained by converting a normal rotating speed interval under the idle running of the engine, for example, the normal rotating speed interval of the idle running of the engine is 1000 rpm/min-1500 rpm/min, and the preset rotating speed range may be 1800 rpm/min-3200 rpm/min.

The preset torque range may be a preset required torque range capable of entering the active heating mode, for example, -13Nm to-1 Nm. The first preset temperature may be a preset maximum temperature of the motor capable of entering the active heating mode, such as 135 ℃.

Specifically, if the motor rotation speed is in the preset rotation speed range, the target torque is in the preset torque range, the working state is the torque control state, and the motor temperature does not exceed the first preset temperature, GMCU can determine that the motor meets the motor heating condition at the moment.

Through the mode, the active heating mode can be prevented from being entered under the condition that the temperature of the motor is high, the active heating mode can be prevented from being entered under the condition that the rotating speed or the torque of the motor is not matched with the idle state, the heating safety of the motor is further guaranteed, and the motor is prevented from being damaged by controlling the heating of the motor.

In another specific embodiment, determining whether the motor controller information in the motor-related operation information satisfies the controller heating condition includes:

If the failure level in the motor controller information is smaller than the preset level and the temperature of the controller does not exceed the second preset temperature, determining that the motor controller information meets the heating condition of the controller.

Wherein the motor controller information includes a fault level and a controller temperature. The second preset temperature may be a preset maximum temperature of the controller capable of entering the active heating mode, such as 135 ℃. The preset level may be a preset highest failure level of GMCU capable of entering the active heating mode, e.g., level 1.

For example, the fault level GMCU has 3 levels altogether, and level 1 is a fault only for alarming, i.e. a fault code is reported, for example, the cooling liquid temperature sensor is short-circuited to the power supply, and the motor controller can enter the active heating mode under the fault because the fault does not cause too much influence on the operation of the vehicle. The level 2 is to report the fault code, and the power needs to be reduced, for example, the current sensor is over-current, and the internal components of the motor controller are damaged due to the over-current, so that the power needs to be limited. The 3-stage is to report a fault code, limit power, and the engine controller is shut down, at which time no power is output, and if a collision is detected, it may be determined that a 3-stage fault exists.

Specifically, if the failure level in the motor controller information is less than the preset level and the controller temperature does not exceed the second preset temperature, GMCU may determine that the motor controller meets the controller heating condition.

Through the mode, the active heating mode can be avoided under the condition that the temperature of the motor controller is higher, the active heating mode can be prevented from being entered under the condition that the fault level of the motor controller is higher, the safety of heating of the motor is further ensured, and the damage to GMCU caused by heating of the motor is avoided.

And S240, if the related operation information of the motor meets the preset heating condition, controlling the motor to charge by taking the first preset power as a power battery through a torque control mode, and heating by taking the second preset power, wherein the second preset power is the difference between the total power output by the motor and the first preset power.

In this embodiment, considering the situation that after GMCU enters the active heating mode, the temperature of the motor continuously rises and the temperature of GMCU continuously rises due to continuous heating of the motor, in order to exit the active heating mode in time under the condition of overhigh temperature, the relevant operation information of the motor can be detected in real time to determine whether the preset heating exit condition is met.

re-acquiring relevant operation information of the motor; and judging whether the new motor related operation information meets a preset heating exit condition, if so, stopping charging by taking the first preset power as a power battery, and stopping heating by taking the second preset power.

Specifically, GMCU may retrieve the motor-related operation information, and determine whether the motor-related operation information satisfies the preset heating exit condition. Wherein, can judge whether the new relevant operation information of motor meets the heating and withdraw from the condition according to motor information and motor controller information in the relevant operation information of new motor.

For example, whether the preset heating condition is satisfied may be determined according to the new motor information and the new motor controller information, and if not, it may be determined that the motor satisfies the preset heating exit condition.

Or the possibility of detection errors of the operation information is considered, and the threshold value and the range in the preset heating condition can be adjusted to a certain extent to obtain the preset heating exit condition, so that the new motor information and the new motor controller information are combined to judge whether the preset heating exit condition is met.

In one example, if the new motor-related operating information satisfies at least one of the following conditions, it is determined that the new motor-related operating information satisfies the preset heating exit condition:

The preset lower rotation speed limit may be a preset minimum rotation speed capable of keeping the active heating mode, and may be calculated by combining a lower limit value in a preset rotation speed range, for example, 1800rpm/min is taken, and in order to prevent jump, the preset lower rotation speed limit may be adjusted down by 100rpm/min, that is, 1700rpm/min. The preset upper rotational speed limit may be a preset maximum rotational speed capable of maintaining the active heating mode, and may be calculated according to an upper limit value in a preset rotational speed range, for example, 3200rpm/min is taken, and in order to prevent jump, the preset upper rotational speed limit may be adjusted up by 100rpm/min, that is, 3300rpm/min.

The preset lower torque limit may be a preset minimum torque capable of maintaining the active heating mode, and may be calculated in combination with a lower limit value in a preset torque range, for example, -13Nm, and in order to prevent occurrence of jump, the preset lower torque limit may be adjusted down by 1Nm, that is, -14Nm. The preset torque upper limit may be a preset maximum torque capable of maintaining the active heating mode, and may be calculated in combination with an upper limit value in a preset torque range, for example, -1Nm, and in order to prevent occurrence of jump, the preset torque upper limit may be adjusted up by 1Nm, that is, 0Nm.

The third preset temperature may be a preset maximum temperature of the motor capable of maintaining the active heating mode, and may be calculated by combining the first preset temperature, for example, 135 ℃, and in order to prevent jump, the third preset temperature may be adjusted up by 5 ℃, that is, 140 ℃. The fourth preset temperature may be a preset maximum temperature of the controller capable of maintaining the active heating mode, and may be calculated in combination with the second preset temperature, for example, 135 ℃, and in order to prevent jump, the fourth preset temperature may be adjusted up to 5 ℃, that is, 140 ℃.

Specifically, if the new motor rotational speed is less than the preset rotational speed lower limit or greater than the preset rotational speed upper limit, or the new target torque is less than the preset torque lower limit or greater than the preset torque upper limit, or the new fault level is not less than the preset level, or the new motor temperature is greater than the third preset temperature, or the new controller temperature is greater than the fourth preset temperature, it is indicated that the motor controller and the motor cannot continue to heat, and at this time, it may be determined that the preset heating exit condition is satisfied.

In the above-mentioned alternative embodiment, by re-acquiring information such as the motor rotation speed, the target torque, the motor temperature, the fault level, and the controller temperature, and further judging whether the preset heating exit condition is satisfied based on the newly acquired information, the situation that the motor or the motor controller is damaged due to continuous heating when the motor temperature or the motor controller temperature is too high can be avoided. And by setting the preset heating exit condition different from the preset heating condition, the active heating mode can be prevented from being exited by mistake under the condition that the data such as temperature, torque and the like have normal jump.

It should be noted that, after determining that the new operation information related to the motor satisfies the preset heating exit condition, the motor may control GMCU to exit the active heating mode, and in comparison with the active heating mode, in the charging mode, the motor may use all of the output power to charge the power battery. In other words, GMCU may control the motor to stop heating and control the motor to use the total output power to charge the power battery entirely after determining that the motor meets the heating exit condition.

In the above embodiment, by judging whether the preset heating exit condition is satisfied after the active heating mode is entered, the safety and reliability of the heating of the motor can be ensured, the heating can be stopped in time under the condition of abnormal information such as temperature or torque, and further the damage to the motor and the motor controller can be avoided in time.

According to the method provided by the embodiment, through setting the motor heating conditions and the controller heating conditions and acquiring the motor information and the motor controller information, whether the motor heating conditions and the controller heating conditions are met or not is judged respectively, heating under the condition that the temperature of the motor and the temperature of the motor controller are too high can be avoided simultaneously, heating under the condition that the fault level of the motor controller is too high can be avoided, and the safety of heating of the motor is guaranteed.

Based on the same inventive concept, the application also provides a power battery charging device corresponding to the method in any embodiment.

Fig. 3 is a schematic structural diagram of a power battery charging device according to an embodiment of the present application, and referring to fig. 3, the power battery charging device includes a mode status obtaining module 310, a motor information obtaining module 320, and a motor control module 330, where:

The mode state obtaining module 310 is configured to obtain a starting mode and an operating state of the vehicle;

The motor information obtaining module 320 is configured to obtain motor related operation information when the start mode is cold start and the operation state is idle operation;

the motor control module 330 is configured to control, by using a torque control mode, the motor to charge the power battery with a first preset power and to generate heat with a second preset power if the related operation information of the motor satisfies a preset heating condition, where the second preset power is a difference between the total output power of the motor and the first preset power.

Optionally, the mode state obtaining module 310 includes a cold start judging unit, configured to obtain a current ambient temperature, an air conditioning working state of the vehicle, and a high-voltage state of the vehicle; and if the current ambient temperature is smaller than a preset temperature threshold, the working state of the air conditioner is a non-heating state, and the high-pressure state is high-pressure starting, determining that the starting mode is cold starting.

Optionally, the preset heating conditions include a motor heating condition and a controller heating condition; the motor control module 330 is further configured to determine whether motor information in the motor-related operation information meets the motor heating condition, and whether motor controller information in the motor-related operation information meets the controller heating condition; if yes, determining that the related operation information of the motor meets a preset heating condition.

Optionally, the motor control module 330 is further configured to determine that the motor information satisfies a motor heating condition if the motor speed in the motor information is in a preset speed range, the target torque is in a preset torque range, the working state is a torque control state, and the motor temperature does not exceed a first preset temperature.

Optionally, the motor control module 330 is further configured to determine that the motor controller information meets the controller heating condition if the failure level in the motor controller information is less than a preset level and the controller temperature does not exceed a second preset temperature.

Optionally, the motor control module 330 is further configured to reacquire motor related operation information; and judging whether the new motor related operation information meets a preset heating exit condition, if so, stopping charging by taking the first preset power as a power battery, and stopping heating by taking the second preset power.

Optionally, the motor control module 330 is further configured to determine that the new motor-related operation information meets a preset heating exit condition if the new motor-related operation information meets at least one of the following conditions:

Optionally, the motor control module 330 is further configured to obtain a current remaining power of the power battery; and if the current residual electric quantity is larger than a preset electric quantity threshold value, controlling the motor to charge by using a third preset power as a power battery through a torque control mode, wherein the third preset power is smaller than the first preset power.

Optionally, the motor control module 330 is further configured to reacquire an operating state of the vehicle; and if the new running state is non-idle running, controlling the motor to charge the power battery by using the total output power.

For convenience of description, the above devices are described as being functionally divided into various modules, respectively. Of course, the functions of each module may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.

The device of the foregoing embodiment is used to implement the corresponding power battery charging method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.

Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application, which shows a specific hardware structure of the electronic device, where the device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 implement communication connections therebetween within the device via a bus 1050.

The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit ), a microprocessor, an Application SPECIFIC INTEGRATED Circuit (ASIC), or one or more integrated circuits, etc. for executing related programs to implement the technical solutions provided in the embodiments of the present disclosure.

The Memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory ), static storage, dynamic storage, etc. Memory 1020 may store an operating system and other application programs, and when the embodiments of the present specification are implemented in software or firmware, the associated program code is stored in memory 1020 and executed by processor 1010.

The input/output interface 1030 is used to connect with an input/output module for inputting and outputting information. The input/output module may be configured as a component in a device (not shown) or may be external to the device to provide corresponding functionality. Wherein the input devices may include a keyboard, mouse, touch screen, microphone, various types of sensors, etc., and the output devices may include a display, speaker, vibrator, indicator lights, etc.

Communication interface 1040 is used to connect communication modules (not shown) to enable communication interactions of the present device with other devices. The communication module may implement communication through a wired manner (such as USB, network cable, etc.), or may implement communication through a wireless manner (such as mobile network, WIFI, bluetooth, etc.).

Bus 1050 includes a path for transferring information between components of the device (e.g., processor 1010, memory 1020, input/output interface 1030, and communication interface 1040).

It should be noted that although the above-described device only shows processor 1010, memory 1020, input/output interface 1030, communication interface 1040, and bus 1050, in an implementation, the device may include other components necessary to achieve proper operation. Furthermore, it will be understood by those skilled in the art that the above-described apparatus may include only the components necessary to implement the embodiments of the present description, and not all the components shown in the drawings.

The electronic device of the foregoing embodiment is configured to implement the corresponding power battery charging method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.

Based on the same inventive concept, the present application also provides a non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the power battery charging method according to any of the above embodiments, corresponding to the method of any of the above embodiments.

The computer readable media of the present embodiments, including both permanent and non-permanent, removable and non-removable media, may be used to implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer 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, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device.

The storage medium of the above embodiment stores computer instructions for causing the computer to execute the power battery charging method according to any one of the above embodiments, and has the advantages of the corresponding method embodiments, which are not described herein.

Based on the same inventive concept, the present application also provides a vehicle corresponding to the method of any embodiment, the vehicle comprising:

A memory for storing executable program code;

Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the application (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the application, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the application as described above, which are not provided in detail for the sake of brevity.

Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the embodiments of the present application. Furthermore, the devices may be shown in block diagram form in order to avoid obscuring the embodiments of the present application, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the present application are to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that embodiments of the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.

While the application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, and the like, which are within the spirit and principles of the embodiments of the application, are intended to be included within the scope of the application.

Claims

1. A method of charging a power battery, the method comprising:

Acquiring a starting mode and an operating state of a vehicle;

2. The method of claim 1, wherein the acquiring a start mode of the vehicle comprises:

3. The method of claim 1, wherein the preset heating conditions include a motor heating condition and a controller heating condition; after the motor related operation information is acquired, the method further comprises:

4. A method according to claim 3, wherein determining whether motor information in the motor-related operation information satisfies the motor heating condition comprises:

5. A method according to claim 3, wherein determining whether motor controller information in the motor-related operation information satisfies the controller heating condition comprises:

6. The method of claim 1, further comprising, after said controlling the motor in the torque control mode to charge the power battery with the first preset power:

Re-acquiring relevant operation information of the motor;

7. The method of claim 6, wherein the new motor-related operating information is determined to satisfy a preset heating exit condition if the new motor-related operating information satisfies at least one of the following conditions:

8. The method of claim 1, further comprising, after said controlling the motor in the torque control mode to charge the power battery with the first preset power:

Re-acquiring the running state of the vehicle;

9. A power battery charging apparatus, the apparatus comprising:

10. A vehicle, characterized in that the vehicle comprises:

A memory for storing executable program code;

a processor for calling and running the executable program code from the memory, causing the vehicle to perform the method of any one of claims 1 to 8.