CN111605439B - Motor auxiliary heating control method, device, equipment and storage medium - Google Patents

Motor auxiliary heating control method, device, equipment and storage medium Download PDF

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Publication number
CN111605439B
CN111605439B CN202010520441.XA CN202010520441A CN111605439B CN 111605439 B CN111605439 B CN 111605439B CN 202010520441 A CN202010520441 A CN 202010520441A CN 111605439 B CN111605439 B CN 111605439B
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motor
heating
current
vehicle
state
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CN111605439A (en
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王大超
张威
林俐
黄子
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/48—Drive Train control parameters related to transmissions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The invention discloses a motor auxiliary heating control method, device, equipment and storage medium, and belongs to the technical field of motor control. The invention acquires the current voltage of the vehicle battery, detects whether the vehicle is in a charging state according to the current voltage, acquires the current running state of the vehicle when the vehicle is in the charging state, receives a heating enabling instruction sent by the vehicle control unit when the current running state is in a normal state, acquires current vehicle state information, judges whether the motor meets a preset heating condition according to the current vehicle state information, controls the motor to perform auxiliary heating when the motor meets a preset heating condition, improves the safety of the auxiliary heating of the motor through the detection of the current running state of the vehicle during charging, and controls the motor to perform auxiliary heating on the vehicle battery when the motor meets the preset heating condition, so that the motor can perform auxiliary heating on the vehicle battery in time, and improves the heating efficiency of the battery.

Description

Motor auxiliary heating control method, device, equipment and storage medium
Technical Field
The invention relates to the technical field of motor control, in particular to a motor auxiliary heating control method, device, equipment and storage medium.
Background
The power battery of the electric automobile has the defects of low activity, large internal resistance and weak charging current accepting capacity in a low-temperature environment, so that the charging and discharging performance of the power battery is poor in the low-temperature environment, and the charging performance is obviously reduced in the low-temperature environment, thereby influencing normal charging. In order to reduce the influence of low-temperature environment on the charging and discharging performance of the power battery, the power battery needs to be heated to increase the temperature of the battery pack. The new energy electric automobile mainly adopts the positive temperature coefficient thermistor to heat at the present stage, utilizes the resistance heating type device such as the positive temperature coefficient thermistor to heat power battery and supplies heat, and is with high costs, installation space is big, heats the battery package under the low temperature environment and needs higher heating power, has greatly increased production manufacturing cost to heating efficiency is not high.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a motor auxiliary heating control method, a motor auxiliary heating control device, motor auxiliary heating equipment and a storage medium, and aims to solve the technical problem of low battery heating efficiency in the prior art.
In order to achieve the above object, the present invention provides a motor auxiliary heating control method, comprising the steps of:
when a heating enabling instruction is received, current vehicle state information is obtained;
judging whether the motor meets a preset heating condition or not according to the current vehicle state information;
and when the motor meets the preset heating condition, controlling the motor to perform auxiliary heating.
Preferably, before the step of acquiring the current vehicle state information when the heating enabling instruction is received, the method further includes:
acquiring the current voltage of a vehicle battery;
detecting whether a vehicle corresponding to the vehicle battery is in a charging state according to the current voltage;
when the vehicle is in a charging state, acquiring the current running state of the vehicle;
and when the current running state is in a normal state, receiving a heating enabling instruction sent by the vehicle control unit.
Preferably, the step of determining whether the motor satisfies a preset heating condition according to the current vehicle state information includes:
extracting current vehicle parameters, current motor parameters and current temperature parameters from the current vehicle state information;
and when the current vehicle parameter meets a first preset condition, the current motor parameter meets a second preset condition and the current temperature parameter meets a third preset condition, judging that the motor meets a preset heating condition.
Preferably, after the step of controlling the motor to perform auxiliary heating when the motor satisfies the preset heating condition, the method further includes:
detecting the current running state of the vehicle in real time;
and when the current running state is detected to be a fault state, receiving an auxiliary heating canceling instruction sent by the vehicle control unit, and controlling the motor to stop auxiliary heating according to the auxiliary heating canceling instruction.
Preferably, after the step of controlling the motor to perform auxiliary heating when the motor satisfies the preset heating condition, the method further includes:
acquiring the current temperature of the motor during auxiliary heating;
determining a heating identifier corresponding to the motor according to the current temperature;
and controlling the on-off state of a current control part corresponding to the motor according to the heating identifier.
Preferably, the heating marks comprise a first heating mark and a second heating mark;
the step of determining the heating identifier corresponding to the motor according to the current temperature comprises the following steps:
when the current temperature is greater than or equal to a first preset temperature, determining that a heating identifier corresponding to the motor is the first heating identifier;
and when the current temperature is lower than the first preset temperature, determining that the heating identifier corresponding to the motor is the second heating identifier.
Preferably, the step of controlling the switch state of the current control component corresponding to the motor according to the heating identifier comprises:
when the heating identifier is the first heating identifier, adjusting the on-off state of a current control part corresponding to the motor to be in an off state;
and when the heating identifier is the second heating identifier, adjusting the switching state of the current control part corresponding to the motor to be in an opening state.
In addition, in order to achieve the above object, the present invention also provides a motor auxiliary heating control apparatus, including:
the acquisition module is used for acquiring current vehicle state information when a heating enabling instruction is received;
the judging module is used for judging whether the motor meets the preset heating condition according to the current vehicle state information;
and the control module is used for controlling the motor to carry out auxiliary heating when the motor meets the preset heating condition.
Further, to achieve the above object, the present invention also proposes a motor assist heating control apparatus including: a memory, a processor, and a motor assist heating control program stored on the memory and executable on the processor, the motor assist heating control program configured to implement the steps of the motor assist heating control method as described above.
In addition, to achieve the above object, the present invention further provides a storage medium having a motor-assisted heating control program stored thereon, wherein the motor-assisted heating control program, when executed by a processor, implements the steps of the motor-assisted heating control method as described above.
The invention acquires the current voltage of the vehicle battery, detects whether the vehicle is in a charging state according to the current voltage, acquires the current running state of the vehicle when the vehicle is in the charging state, receives a heating enabling instruction sent by the vehicle control unit when the current running state is in a normal state, acquires current vehicle state information, judges whether the motor meets a preset heating condition according to the current vehicle state information, controls the motor to perform auxiliary heating when the motor meets a preset heating condition, improves the safety of the auxiliary heating of the motor through the detection of the current running state of the vehicle during charging, and controls the motor to perform auxiliary heating on the vehicle battery when the motor meets the preset heating condition, so that the motor can perform auxiliary heating on the vehicle battery in time, and improves the heating efficiency of the battery.
Drawings
FIG. 1 is a schematic structural diagram of a motor-assisted heating control device for a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a motor-assisted heating control method according to a first embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a motor-assisted heating control method according to a second embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a motor-assisted heating control method according to a third embodiment of the present invention;
fig. 5 is a block diagram of the first embodiment of the motor-assisted heating control apparatus according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a motor-assisted heating control device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the motor-assisted heating control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the electronic device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a motor-assisted heating control program.
In the motor-assisted heating control apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the motor auxiliary heating control apparatus of the present invention may be provided in the motor auxiliary heating control apparatus, which calls the motor auxiliary heating control program stored in the memory 1005 through the processor 1001 and executes the motor auxiliary heating control method provided by the embodiment of the present invention.
An embodiment of the present invention provides a motor auxiliary heating control method, and referring to fig. 2, fig. 2 is a schematic flow diagram of a first embodiment of the motor auxiliary heating control method according to the present invention.
In this embodiment, the motor auxiliary heating control method includes the following steps:
step S10: and when the heating enabling instruction is received, acquiring the current vehicle state information.
In this embodiment, the execution main body may be a motor controller PCU, and the motor controller is configured to control starting and stopping of a vehicle motor according to parameters such as a vehicle operating state and a battery temperature.
It should be noted that, it is necessary to receive a heating enabling instruction when current vehicle state information is acquired, the heating enabling instruction is sent by the vehicle control unit VCU, the vehicle state information includes a main relay pull-in state, a gear signal, an electronic parking state and the like, the motor state includes a motor temperature, a motor rotation speed, a motor torque and the like, and the temperature state includes a battery temperature, an ambient temperature and the like.
It is easy to understand that, in an actual process, not all cases receive the heating enabling instruction sent by the vehicle controller, and receiving the heating enabling instruction sent by the vehicle controller requires that the vehicle is charging while the vehicle is in a normal state during charging, and specifically, before the step of acquiring current vehicle state information when the heating enabling instruction is received, the method further includes: acquiring the current voltage of a vehicle battery; detecting whether a vehicle corresponding to the vehicle battery is in a charging state according to the current voltage; when the vehicle is in a charging state, acquiring the current running state of the vehicle; and when the current running state is in a normal state, receiving a heating enabling instruction sent by the vehicle control unit.
In a specific implementation, the voltage when the battery is in a charging state is different from the voltage when the battery is not charged, normally, the voltage when the battery is in an increasing state, that is, the voltage when the battery is charged is greater than the voltage when the battery is not charged, and whether the vehicle is in the charging state can be detected according to the current voltage of the vehicle battery.
Step S20: and judging whether the motor meets a preset heating condition or not according to the current vehicle state information.
It should be noted that, in this embodiment, when a vehicle battery is charged, the conventional positive temperature coefficient thermistor is replaced by the motor auxiliary heating, and certain preconditions, such as preset heating conditions in this embodiment, are required for the auxiliary heating of the vehicle battery during charging by the motor, so before the vehicle battery during charging is subjected to the auxiliary heating by the motor, it is necessary to determine whether the motor meets the preset heating conditions, such as whether a gear is in a parking position, whether an electronic parking is in a hugging state, and whether the motor temperature and the motor rotation speed meet threshold values according to current vehicle state information.
Step S30: and when the motor meets the preset heating condition, controlling the motor to perform auxiliary heating.
In this embodiment, if the motor satisfies the predetermined heating condition, it indicates that the auxiliary heating of the battery during charging is safer through the motor, and the battery charging efficiency can be improved, so that the motor is controlled to perform the auxiliary heating of the rechargeable battery when the motor satisfies the predetermined heating condition.
In the embodiment, the current voltage of the vehicle battery is acquired, whether the vehicle corresponding to the vehicle battery is in a charging state is detected according to the current voltage, when the vehicle is in the charging state, the current running state of the vehicle is acquired, when the current running state is in a normal state, a heating enabling instruction sent by the vehicle control unit is received, current vehicle state information is acquired, whether the motor meets a preset heating condition is judged according to the current vehicle state information, when the motor meets the preset heating condition, the motor is controlled to perform auxiliary heating, the safety of the auxiliary heating of the motor is improved by detecting the current running state of the vehicle during charging, and when the motor meets the preset heating condition, the motor is controlled to perform auxiliary heating on the vehicle battery, so that the motor can perform auxiliary heating on the vehicle battery in time, the heating efficiency of the battery is improved.
Referring to fig. 3, fig. 3 is a schematic flow chart of a motor auxiliary heating control method according to a second embodiment of the present invention.
A second embodiment of the motor assist heating control method of the invention is proposed based on the above-described first embodiment.
In the second embodiment, the step S20 specifically includes:
step S201: and extracting the current vehicle parameter, the current motor parameter and the current temperature parameter from the current vehicle state information.
In this embodiment, the current vehicle parameters, the current motor parameters, and the current temperature parameters may be extracted from the obtained current vehicle state information, where the current vehicle parameters include a main relay pull-in state, a gear signal, and an electronic parking state, the current motor parameters include a motor temperature, a motor rotation speed, a motor torque, a motor operating state, and the like, and the current temperature parameters include a battery temperature, an ambient temperature, and the like.
Step S202: and judging whether the motor meets a preset heating condition or not according to the current vehicle parameter, the current motor parameter and the current temperature parameter.
In this embodiment, the preset heating conditions include a first preset condition, a second preset condition and a third preset condition, the first preset condition is used to determine a current vehicle parameter, such as whether a gear signal is a parking gear and whether an electronic parking state is a tight state, the second preset condition is used to determine a current motor parameter, such as whether a motor temperature meets a motor temperature threshold, whether a motor rotation speed meets a motor rotation speed threshold and whether a motor torque meets a motor torque threshold, and the like, the third preset condition is used to determine a current temperature parameter, such as whether a battery temperature threshold and whether an environment temperature meets an environment temperature threshold, in this embodiment, determining whether a motor meets a preset heating condition according to the current vehicle parameter, the current motor parameter and the current temperature parameter is used to determine whether the current vehicle parameter meets the first preset condition, the second preset condition is used to determine whether the current vehicle parameter meets the preset heating condition, Whether current motor parameter satisfies the second and predetermine the condition and whether current temperature parameter satisfies the third and predetermine the condition, in this embodiment when current vehicle parameter satisfies first predetermine the condition, current motor parameter satisfies the second and predetermine the condition and current temperature parameter satisfies the third and predetermine the condition, can carry out the auxiliary heating, set up three kinds of preset conditions and make the judgement of heating condition more accurate, make the motor can be to the more timely accurate auxiliary heating that carries on of vehicle battery, the efficiency of motor auxiliary heating has been improved.
Further, after the step S30, the method further includes:
step S401: and detecting the current running state of the vehicle in real time.
It is easy to understand that, in order to ensure the charging safety of the motor to the vehicle battery, in the embodiment, the current state of the vehicle is detected in real time to ensure the safety of the motor auxiliary heating, in consideration that there may be other factors that may cause the current running state of the vehicle to be incapable of being continuously charged in the actual charging process of the vehicle.
Step S402: and when the current running state is detected to be a fault state, receiving an auxiliary heating canceling instruction sent by the vehicle control unit, and controlling the motor to stop auxiliary heating according to the auxiliary heating canceling instruction.
In the specific implementation, if it is detected that the current operating state of the vehicle is a fault state, it indicates that the vehicle cannot continue to be charged, and at the same time, the auxiliary heating of the vehicle battery by the motor needs to be stopped.
The present embodiment extracts the current vehicle parameter, the current motor parameter and the current temperature parameter from the current vehicle state information; the method comprises the steps that when a current vehicle parameter meets a first preset condition, a current motor parameter meets a second preset condition and a current temperature parameter meets a third preset condition, the motor is judged to meet a preset heating condition, when the motor meets the preset heating condition, the motor is controlled to carry out auxiliary heating, the auxiliary heating efficiency of the motor is improved, when the vehicle is charged, the current running state of the vehicle is detected in real time, when the current running state is detected to be a fault state, an auxiliary heating canceling instruction sent by a whole vehicle controller is received, the motor is controlled to stop auxiliary heating according to the auxiliary heating canceling instruction, and meanwhile the auxiliary heating safety of the motor is improved.
Referring to fig. 4, fig. 4 is a schematic flow chart of a motor auxiliary heating control method according to a third embodiment of the present invention.
Third embodiment of the motor-assisted heating control method according to the present invention based on the first embodiment described above, in the third embodiment, after the step S30, the method further includes:
step S501: and acquiring the current temperature of the motor during auxiliary heating.
It should be noted that, in the embodiment, the essence of the auxiliary heating of the vehicle battery by the motor is that the heat generated by the motor is transferred to the vehicle battery, and when the motor is used for auxiliary heating of the vehicle battery, the temperature of the motor tends to rise continuously.
Step S502: and determining a heating identifier corresponding to the motor according to the current temperature.
In this embodiment, a current temperature of the motor during the auxiliary heating determines whether the motor can continue to perform the auxiliary heating on the vehicle battery, and this embodiment determines according to a heating identifier corresponding to the current temperature, specifically, the step of determining the heating identifier corresponding to the motor according to the current temperature includes: when the current temperature is greater than or equal to a first preset temperature, determining that a heating identifier corresponding to the motor is the first heating identifier; the current temperature is less than when first predetermined temperature, confirm the heating sign that the motor corresponds does the second heats the sign, and first predetermined temperature is the maximum temperature value when the motor carries out the auxiliary heating, and concrete data can be set for by oneself according to actual conditions, consequently when the heating sign that the motor corresponds is first heating sign, show that the current temperature of motor is too high, can't continue to carry out the auxiliary heating to vehicle battery, and when the heating sign that the motor corresponds is the second heating sign, show that the motor can continue to carry out the auxiliary heating to vehicle battery.
Step S503: and controlling the on-off state of a current control part corresponding to the motor according to the heating identifier.
In this embodiment, the current control unit includes an insulated gate bipolar transistor, and controls the current output by the motor through switching of a switch state of the current control unit, and in this embodiment, the current control unit controls the switch state of the current control unit corresponding to the motor according to a heating identifier, and specifically, the step of controlling the switch state of the current control unit corresponding to the motor according to the heating identifier includes: when the heating identifier is the first heating identifier, adjusting the on-off state of a current control part corresponding to the motor to be in an off state;
and when the heating identifier is the second heating identifier, adjusting the switching state of the current control part corresponding to the motor to be in an opening state.
It should be noted that the first heating flag indicates that the motor cannot continue to assist in heating the vehicle battery, and therefore, when the heating flag is the first heating flag, the on-off state of the current control unit is adjusted to the off state to cut off the output current of the motor, so that the motor stops assisting in heating, and when the heating flag is the second heating flag, the on-off state of the current control unit is adjusted to the on state to continue assisting in heating the motor.
In the embodiment, the output current of the motor is further adjusted when the switching state of the current control part is in the on state, specifically, the gradient of the current is adjusted according to the magnitude of the current output by the motor, for example, when the output current is greater than 100A, the current gradient is set to be 2A/S, when the output current is less than or equal to 100A, the current gradient is reduced to 1A/S, and vehicle shake caused by the motor in auxiliary heating of the vehicle battery is prevented by adjusting the current gradient.
In the embodiment, the current temperature of the motor during auxiliary heating is obtained; determining a heating identifier corresponding to the motor according to the current temperature; according to the heating identifier, the on-off state of the current control part corresponding to the motor is controlled, the on-off state of the current control part and the current gradient output by the motor are controlled at the same time, vehicle shaking caused when the motor carries out auxiliary heating on a vehicle battery is prevented, and the auxiliary heating stability of the motor is improved while the heating efficiency is improved.
Referring to fig. 5, fig. 5 is a block diagram illustrating a first embodiment of the motor auxiliary heating control apparatus according to the present invention.
As shown in fig. 5, the motor auxiliary heating control device according to the embodiment of the present invention includes:
the obtaining module 10 is configured to obtain current vehicle state information when a heating enabling instruction is received.
In this embodiment, the execution subject is a motor auxiliary heating control device, which is used to control the start and stop of a vehicle motor according to parameters such as a vehicle running state and a battery temperature.
It should be noted that, it is necessary to receive a heating enabling instruction when current vehicle state information is acquired, the heating enabling instruction is sent by the vehicle control unit VCU, the vehicle state information includes a main relay pull-in state, a gear signal, an electronic parking state and the like, the motor state includes a motor temperature, a motor rotation speed, a motor torque and the like, and the temperature state includes a battery temperature, an ambient temperature and the like.
It is easy to understand that, in an actual process, not all cases receive the heating enabling instruction sent by the vehicle controller, and receiving the heating enabling instruction sent by the vehicle controller requires that the vehicle is charging while the vehicle is in a normal state during charging, and specifically, before the step of acquiring current vehicle state information when the heating enabling instruction is received, the method further includes: acquiring the current voltage of a vehicle battery; detecting whether a vehicle corresponding to the vehicle battery is in a charging state according to the current voltage; when the vehicle is in a charging state, acquiring the current running state of the vehicle; and when the current running state is in a normal state, receiving a heating enabling instruction sent by the vehicle control unit.
In a specific implementation, the voltage when the battery is in a charging state is different from the voltage when the battery is not charged, normally, the voltage when the battery is in an increasing state, that is, the voltage when the battery is charged is greater than the voltage when the battery is not charged, and whether the vehicle is in the charging state can be detected according to the current voltage of the vehicle battery.
And the judging module 20 is used for judging whether the motor meets the preset heating condition according to the current vehicle state information.
It should be noted that, in this embodiment, when a vehicle battery is charged, the conventional positive temperature coefficient thermistor is replaced by the motor auxiliary heating, and certain preconditions, such as preset heating conditions in this embodiment, are required for the auxiliary heating of the vehicle battery during charging by the motor, so before the vehicle battery during charging is subjected to the auxiliary heating by the motor, it is necessary to determine whether the motor meets the preset heating conditions, such as whether a gear is in a parking position, whether an electronic parking is in a hugging state, and whether the motor temperature and the motor rotation speed meet threshold values according to current vehicle state information.
And the control module 30 is used for controlling the motor to perform auxiliary heating when the motor meets the preset heating condition.
In this embodiment, if the motor satisfies the predetermined heating condition, it indicates that the auxiliary heating of the battery during charging is safer through the motor, and the battery charging efficiency can be improved, so that the motor is controlled to perform the auxiliary heating of the rechargeable battery when the motor satisfies the predetermined heating condition.
In the embodiment, the current voltage of the vehicle battery is acquired, whether the vehicle corresponding to the vehicle battery is in a charging state is detected according to the current voltage, when the vehicle is in the charging state, the current running state of the vehicle is acquired, when the current running state is in a normal state, a heating enabling instruction sent by the vehicle control unit is received, current vehicle state information is acquired, whether the motor meets a preset heating condition is judged according to the current vehicle state information, when the motor meets the preset heating condition, the motor is controlled to perform auxiliary heating, the safety of the auxiliary heating of the motor is improved by detecting the current running state of the vehicle during charging, and when the motor meets the preset heating condition, the motor is controlled to perform auxiliary heating on the vehicle battery, so that the motor can perform auxiliary heating on the vehicle battery in time, the heating efficiency of the battery is improved.
In one embodiment, the system further comprises a detection module for acquiring the current voltage of the vehicle battery; detecting whether a vehicle corresponding to the vehicle battery is in a charging state according to the current voltage; when the vehicle is in a charging state, acquiring the current running state of the vehicle; and when the current running state is in a normal state, receiving a heating enabling instruction sent by the vehicle control unit.
In an embodiment, the determining module 20 is further configured to extract a current vehicle parameter, a current motor parameter, and a current temperature parameter from the current vehicle state information; and when the current vehicle parameter meets a first preset condition, the current motor parameter meets a second preset condition and the current temperature parameter meets a third preset condition, judging that the motor meets a preset heating condition.
In one embodiment, the system further comprises a cancellation module for detecting the current running state of the vehicle in real time; and when the current running state is detected to be a fault state, receiving an auxiliary heating canceling instruction sent by the vehicle control unit, and controlling the motor to stop auxiliary heating according to the auxiliary heating canceling instruction.
In one embodiment, the system further comprises a driving module, configured to obtain a current temperature of the motor during auxiliary heating; determining a heating identifier corresponding to the motor according to the current temperature; and controlling the on-off state of a current control part corresponding to the motor according to the heating identifier.
In an embodiment, the driving module is further configured to determine that the heating identifier corresponding to the motor is the first heating identifier when the current temperature is greater than or equal to a first preset temperature; and when the current temperature is lower than the first preset temperature, determining that the heating identifier corresponding to the motor is the second heating identifier.
In an embodiment, the driving module is further configured to adjust a switching state of a current control component corresponding to the motor to an off state when the heating identifier is the first heating identifier; and when the heating identifier is the second heating identifier, adjusting the switching state of the current control part corresponding to the motor to be in an opening state.
Furthermore, an embodiment of the present invention further provides a storage medium, where a motor auxiliary heating control program is stored, and the motor auxiliary heating control program, when executed by a processor, implements the steps of the motor auxiliary heating control method as described above.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment can be referred to the motor auxiliary heating control method provided in any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (8)

1. A motor auxiliary heating control method is characterized by comprising the following steps:
when a heating enabling instruction is received, current vehicle state information is obtained;
extracting current vehicle parameters, current motor parameters and current temperature parameters from the current vehicle state information;
judging whether the motor meets a preset heating condition or not according to the current vehicle parameter, the current motor parameter and the current temperature parameter;
when the motor meets the preset heating condition, controlling the motor to perform auxiliary heating;
detecting the current running state of the vehicle in real time;
and when the current running state is detected to be a fault state, receiving an auxiliary heating canceling instruction sent by the vehicle control unit, and controlling the motor to stop auxiliary heating according to the auxiliary heating canceling instruction.
2. The motor-assisted heating control method according to claim 1, wherein the step of obtaining current vehicle state information upon receiving a heating enable instruction, further comprises:
acquiring the current voltage of a vehicle battery;
detecting whether a vehicle corresponding to the vehicle battery is in a charging state according to the current voltage;
when the vehicle is in a charging state, acquiring the current running state of the vehicle;
and when the current running state is in a normal state, receiving a heating enabling instruction sent by the vehicle control unit.
3. The motor auxiliary heating control method according to claim 1 or 2, wherein after the step of controlling the motor to perform auxiliary heating when the motor satisfies the preset heating condition, the method further comprises:
acquiring the current temperature of the motor during auxiliary heating;
determining a heating identifier corresponding to the motor according to the current temperature;
and controlling the on-off state of a current control part corresponding to the motor according to the heating identifier.
4. The motor-assisted heating control method of claim 3, wherein the heating marks include a first heating mark and a second heating mark;
the step of controlling the on-off state of the current control component corresponding to the motor according to the heating identifier comprises the following steps:
when the heating identifier is the first heating identifier, adjusting the on-off state of a current control part corresponding to the motor to be in an off state;
and when the heating identifier is the second heating identifier, adjusting the switching state of the current control part corresponding to the motor to be in an opening state.
5. The motor-assisted heating control method according to claim 4, wherein the step of determining the heating identifier corresponding to the motor according to the current temperature comprises:
when the current temperature is greater than or equal to a first preset temperature, determining that a heating identifier corresponding to the motor is the first heating identifier;
and when the current temperature is lower than the first preset temperature, determining that the heating identifier corresponding to the motor is the second heating identifier.
6. A motor-assisted heating control device, comprising:
the acquisition module is used for acquiring current vehicle state information when a heating enabling instruction is received;
the judging module is used for extracting current vehicle parameters, current motor parameters and current temperature parameters from the current vehicle state information; judging whether the motor meets a preset heating condition or not according to the current vehicle parameter, the current motor parameter and the current temperature parameter;
the control module is used for controlling the motor to perform auxiliary heating when the motor meets the preset heating condition;
the cancellation module is used for detecting the current running state of the vehicle in real time; and when the current running state is detected to be a fault state, receiving an auxiliary heating canceling instruction sent by the vehicle control unit, and controlling the motor to stop auxiliary heating according to the auxiliary heating canceling instruction.
7. A motor-assisted heating control apparatus, characterized in that the motor-assisted heating control apparatus comprises: a memory, a processor, and a motor-assisted heating control program stored on the memory and run on the processor, the motor-assisted heating control program configured to implement the steps of the motor-assisted heating control method of any of claims 1 to 5.
8. A storage medium having stored thereon a motor-assisted heating control program which, when executed by a processor, implements the steps of the motor-assisted heating control method of any one of claims 1 to 5.
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CN112389275B (en) * 2020-11-16 2022-03-29 睿驰电装(大连)电动系统有限公司 Safety control method and device based on electric drive active heating mode
CN112721739B (en) * 2020-12-29 2022-05-17 精进电动科技股份有限公司 Method for driving motor to actively heat battery pack and new energy automobile
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