CN114976370B - Battery pulse heating control system, method, vehicle and storage medium - Google Patents

Battery pulse heating control system, method, vehicle and storage medium Download PDF

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Publication number
CN114976370B
CN114976370B CN202210902114.XA CN202210902114A CN114976370B CN 114976370 B CN114976370 B CN 114976370B CN 202210902114 A CN202210902114 A CN 202210902114A CN 114976370 B CN114976370 B CN 114976370B
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pulse heating
current
battery
hardware
pwm wave
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CN114976370A (en
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邓承浩
胡建军
陈扬
陈健
尹显颂
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Shenzhen Blue Automobile Nanjing Research Institute Co ltd
Chongqing University
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Chongqing University
Changan New Energy Nanjing Research Institute Co Ltd
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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
    • B60L58/25—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 controlling the electric load
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/02—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit
    • B60L15/025—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit using field orientation; Vector control; Direct Torque Control [DTC]
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/02—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit
    • B60L15/08—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit using pulses
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The invention discloses a battery pulse heating control system, a battery pulse heating control method, a vehicle and a storage medium, wherein the battery pulse heating control system comprises the following steps: after the start of pulse heating of the power battery is detected, detecting whether a hardware overcurrent fault occurs through a motor controller; if the motor controller does not report the hardware overcurrent fault, increasing the current of the power battery during pulse heating, wherein the specific mode of increasing the current of the power battery during pulse heating is as follows: reducing the PWM wave switching frequency f, and increasing Ud and Uq, wherein Ud is the direct axis voltage of a motor rotating coordinate system, and Uq is the quadrature axis voltage of the motor rotating coordinate system; if the motor controller reports the hardware overcurrent fault, reducing the pulse heating current of the power battery, wherein the specific mode of reducing the pulse heating current of the power battery is as follows: increasing the PWM wave switching frequency f, decreasing Ud and Uq. The invention improves the pulse heating efficiency of the power battery and ensures the safety and reliability of the hardware of the motor controller.

Description

Battery pulse heating control system, method, vehicle and storage medium
Technical Field
The invention belongs to the technical field of rapid pulse heating of power batteries, and particularly relates to a battery pulse heating control system, a battery pulse heating control method, a vehicle and a storage medium.
Background
The power battery of the electric vehicle has problems of voltage drop, discharge capacity reduction, etc. under low temperature conditions, so that the battery needs to be rapidly heated to a proper temperature. The motor controller is controlled to adjust the PWM wave switching frequency and the PWM duty ratio, and the pulse current flowing through the battery is controlled to heat the battery core. The method is more efficient and less costly than conventional heating by external heat conduction.
However, the pulse heating control method commonly used at present has the following problems: the motor inductance is not identical when the motor rotor is in different positions, and because the sampling frequency of the motor controller software to the current is usually the PWM switching frequency and is the central point of PWM, and the maximum current of pulse heating appears at the turn-off point of PWM, the three-phase current during the pulse heating period can not be accurately obtained by the software, the closed-loop control is difficult, therefore, the software leaves a certain margin on the control algorithm to limit the current, the hardware damage is prevented, and finally, the battery can not be heated by the motor controller fully in the pulse heating process.
Therefore, it is necessary to develop a new battery pulse heating control system, method, vehicle, and storage medium.
Disclosure of Invention
The invention aims to provide a battery pulse heating control system, a battery pulse heating control method, a vehicle and a storage medium, so that the pulse heating efficiency of a power battery is improved, and the safety and the reliability of the hardware of a motor controller are ensured.
In a first aspect, the present invention provides a battery pulse heating control method, including the steps of:
after detecting that the pulse heating of the power battery starts, detecting whether a hardware overcurrent fault occurs through a motor controller:
if the motor controller does not report the hardware overcurrent fault, increasing the current of the power battery during pulse heating, wherein the specific mode of increasing the current of the power battery during pulse heating is as follows: reducing the PWM wave switching frequency f, and increasing Ud and Uq, wherein Ud is the direct axis voltage of a motor rotating coordinate system, and Uq is the quadrature axis voltage of the motor rotating coordinate system;
if the motor controller reports the hardware overcurrent fault, reducing the pulse heating current of the power battery, wherein the specific mode of reducing the pulse heating current of the power battery is as follows: increasing the PWM wave switching frequency f and reducing Ud and Uq;
the PWM wave switching frequency f, ud and Uq corresponding to the hardware maximum current are searched through the hardware overcurrent fault state of the motor controller.
Optionally, when the motor controller reports the hardware overcurrent fault, the number of faults is recorded.
Optionally, after detecting the start of the pulse heating of the power battery, the method further includes:
judging whether the failure times are less than or equal to preset times or not;
if the fault frequency is less than or equal to the preset frequency, detecting whether a hardware overcurrent fault occurs through the motor controller, continuously adjusting the PWM wave switching frequency f, the Ud and the Uq, and searching the maximum current state of the hardware;
if the fault times are larger than the preset times, the current PWM wave switching frequencies f, ud and Uq are considered to be the PWM wave switching frequencies f, ud and Uq corresponding to the hardware maximum current, and the current PWM wave switching frequencies f, ud and Uq are maintained; in order to prevent false triggering of the overcurrent fault, a mode of multiple judgment is adopted.
Optionally, the method further comprises:
setting the overcurrent fault of the hardware of the motor controller as a recoverable fault, clearing the fault before increasing the switching frequency f of the PWM wave and reducing the Ud and the Uq, and adding 1 to the number of the faults.
Optionally, the PWM duty ratio is kept within the preset value while increasing and decreasing the PWM switching frequency f and adjusting Ud and Uq, so as to ensure that the three-phase current proportion is unchanged and the motor output torque is zero.
In a second aspect, the present invention provides a battery pulse heating control system, which includes a memory and a controller, wherein the memory stores a computer readable program, and the computer readable program, when called by the controller, can execute the steps of the battery pulse heating control method according to the present invention.
In a third aspect, the invention provides a vehicle employing a battery pulse heating control system according to the invention.
In a fourth aspect, the present invention provides a storage medium having a computer readable program stored therein, the computer readable program when invoked is capable of performing the steps of the battery pulse heating control method according to the present invention.
The invention has the following advantages: according to the invention, the current of the power module is regulated in a closed loop manner by utilizing a hardware overcurrent protection mechanism of the motor controller, so that the pulse heating current of the battery is controlled to the maximum extent, the pulse heating efficiency of the power battery is improved, and the safety and reliability of the hardware of the motor controller are ensured.
Drawings
Fig. 1 is a flowchart of the first embodiment.
Fig. 2 is a flowchart of the second embodiment.
Fig. 3 is a schematic diagram of three-phase current waveforms Ia, ib, and Ic, dc current waveforms, PWM wave switching frequency f, direct-axis voltage Ud, and quadrature-axis voltage Uq in the second embodiment.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Example one
As shown in fig. 1, in this embodiment, a method for controlling pulse heating of a battery includes the following steps:
step A1, after the start of pulse heating of the power battery is detected, whether a hardware overcurrent fault occurs is detected through a motor controller.
A2, if the motor controller does not report the hardware overcurrent fault, increasing the current of the power battery during pulse heating, and returning to the step A1; the specific way of increasing the current of the power battery during pulse heating is as follows: and reducing the switching frequency f of the PWM wave, and increasing Ud and Uq, wherein Ud is the direct axis voltage of the motor rotating coordinate system, and Uq is the quadrature axis voltage of the motor rotating coordinate system.
Step A3, if the motor controller reports the hardware overcurrent fault, reducing the current for pulse heating of the power battery, and returning to the step A1; the specific way of reducing the pulse heating current of the power battery is as follows: increasing the PWM wave switching frequency f and decreasing Ud and Uq.
In this embodiment, the PWM wave switching frequencies f, ud, and Uq are continuously adjusted according to the hardware overcurrent fault state detected by the motor controller, and the PWM wave switching frequencies f, ud, and Uq corresponding to the hardware maximum current are found. For NVH consideration, the PWM wave switching frequency f is a frequency range within which a larger current can be obtained and a better NVH experience.
According to the formula Q = I 2 Rt, the amount Q of heat generation of the battery internal resistance Rt is proportional to the square of the current I, and therefore, the charging and discharging current of the battery during pulse heating is increased, and the efficiency of pulse heating can be improved. The rising slope of the pulse current is limited by the motor inductance, and under the condition that the motor inductance is fixed, the current value can be increased from two directions of adjusting the PWM wave switching frequency f and the duty ratio in order to increase the current. The duty ratio is calculated by Ud and Uq according to the bus voltage and the principle of vector control. In this embodiment, the PWM switching frequency f is increased or decreased, ud and Uq are adjusted, and the PWM maximum duty ratio is kept within a certain value (e.g., 90%), so as to ensure that the three-phase current ratio is unchanged and the motor output torque is zero. The method ensures the high efficiency of pulse heating of the power battery by accurately controlling the switching frequency of the PWM and the duty ratio of the PWM.
In this embodiment, a battery pulse heating control system includes a memory and a controller, where the memory stores a computer readable program, and the computer readable program, when called by the controller, can execute the steps of the battery pulse heating control method as described in this embodiment.
In the present embodiment, a vehicle employs the battery pulse heating control system as described in the present embodiment.
In this embodiment, a storage medium has a computer readable program stored therein, and the computer readable program can be called to execute the steps of the battery pulse heating control method as described in this embodiment.
Example two
As shown in fig. 2, in this embodiment, a method for controlling pulse heating of a battery includes the following steps:
b1, after the start of pulse heating of the power battery is detected, judging whether the failure times are smaller than or equal to preset times, and if the failure times are smaller than or equal to the preset times, entering a step B2; and if the failure times are larger than the preset times, entering the step B3.
B2, detecting whether a hardware overcurrent fault occurs through a motor controller, continuously adjusting PWM (pulse-width modulation) wave switching frequencies f, ud and Uq, and searching for the maximum current state of the hardware; the method specifically comprises the following steps:
if the motor controller does not report the hardware overcurrent fault, reducing the PWM wave switching frequency f, increasing the Ud and the Uq, and returning to the step B1;
if the motor controller reports the hardware overcurrent fault, the fault is cleared, the number of the faults is increased by 1, the PWM wave switching frequency f is increased, the Ud and the Uq are reduced, and the step B1 is returned;
and step B3, keeping the current PWM wave switching frequencies f, ud and Uq if the current PWM wave switching frequencies f, ud and Uq are the PWM wave switching frequencies f, ud and Uq corresponding to the hardware maximum current.
In this embodiment, a multiple-time judgment mode is adopted, which aims to prevent an overcurrent fault from being triggered by mistake, that is, after the start of pulse heating of a power battery is detected and the number of faults is greater than a preset number, current PWM wave switching frequencies f, ud and Uq are maintained; otherwise, continuously adjusting the PWM wave switching frequency f, ud and Uq until finding the PWM wave switching frequency f, ud and Uq corresponding to the hardware maximum current so as to ensure that the motor controller works in the maximum current state.
In this embodiment, the hardware overcurrent fault of the motor controller is set to be a recoverable fault, and the number of times of the fault is increased by 1 while the fault is cleared.
According to the method, after the PWM wave switching frequency, the Ud and the Uq are continuously adjusted, and the hardware overcurrent fault is repeatedly triggered and recovered, the maximum current value which can be output in the current state and the corresponding PWM wave switching frequency f, the Ud and the Uq can be locked. At the moment, the hardware current of the motor controller is close to the maximum allowable current, and the pulse heating current of the power battery reaches the maximum.
As shown in fig. 3, the three-phase current waveforms Ia, ib, and Ic, the dc current waveform Idc, the PWM wave switching frequency f, the direct-axis voltage Ud, and the quadrature-axis voltage Uq are sequentially mapped from top to bottom, where the abscissa in fig. 3 represents time. As can be seen from fig. 3, after the start of pulse heating of the power battery is detected, firstly, a downward optimization method is adopted for the PWM wave switching frequency f, the PWM wave switching frequency f is continuously reduced, when the PWM wave switching frequency f is reduced to a certain value, an overcurrent fault occurs in the hardware at this time, if the current fault frequency is less than a preset frequency, the fault is cleared, the fault frequency +1 is added, the PWM wave switching frequency f is appropriately increased, and the above steps are repeated until the fault frequency reaches the preset frequency, which indicates that the PWM wave switching frequency f, ud and Uq corresponding to the maximum current of the hardware have been found.
The rest is the same as the first embodiment.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (6)

1. A battery pulse heating control method is characterized by comprising the following steps:
after the start of pulse heating of the power battery is detected, detecting whether a hardware overcurrent fault occurs through a motor controller;
if the motor controller does not report the hardware overcurrent fault, increasing the current of the power battery during pulse heating, wherein the specific mode of increasing the current of the power battery during pulse heating is as follows: reducing the PWM wave switching frequency f and increasing Ud and Uq, wherein Ud is direct axis voltage under a motor rotating coordinate system, and Uq is quadrature axis voltage under the motor rotating coordinate system;
if the motor controller reports the hardware overcurrent fault, reducing the pulse heating current of the power battery, wherein the specific mode of reducing the pulse heating current of the power battery is as follows: increasing the PWM wave switching frequency f and reducing Ud and Uq;
searching PWM wave switching frequencies f, ud and Uq corresponding to the maximum hardware current through the hardware overcurrent fault state of the motor controller;
when responding to the motor controller reporting the hardware overcurrent fault, recording the frequency of the fault;
after detecting that the pulse heating of the power battery is started, the method further comprises the following steps:
judging whether the failure times are less than or equal to preset times;
if the fault frequency is less than or equal to the preset frequency, detecting whether a hardware overcurrent fault occurs through the motor controller, continuously adjusting the PWM wave switching frequency f, the Ud and the Uq, and searching the maximum current state of the hardware;
and if the fault times are greater than the preset times, determining that the current PWM wave switching frequencies f, ud and Uq are the PWM wave switching frequencies f, ud and Uq corresponding to the hardware maximum current, and keeping the current PWM wave switching frequencies f, ud and Uq.
2. The battery pulse heating control method according to claim 1, further comprising:
setting the over-current fault of the hardware of the motor controller as a recoverable fault, clearing the fault before increasing the switching frequency f of the PWM wave and reducing the Ud and the Uq, and adding 1 to the number of the faults.
3. The battery pulse heating control method according to claim 2, characterized in that:
the PWM duty ratio is kept within a preset value while increasing and reducing the PWM wave switching frequency f and adjusting the Ud and the Uq so as to ensure that the proportion of three-phase current is unchanged and the output torque of the motor is zero.
4. A battery pulse heating control system, characterized by: comprising a memory and a controller, said memory having stored therein a computer readable program capable of executing the steps of the battery pulse heating control method according to any one of claims 1 to 3 when invoked by the controller.
5. A vehicle, characterized in that: a battery pulse heating control system as defined in claim 4.
6. A storage medium, characterized by: stored with a computer readable program which when invoked is able to perform the steps of the battery pulse heating control method according to any one of claims 1 to 3.
CN202210902114.XA 2022-07-29 2022-07-29 Battery pulse heating control system, method, vehicle and storage medium Active CN114976370B (en)

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CN112078433A (en) * 2020-08-31 2020-12-15 上海交通大学 Low-temperature preheating device for vehicle power battery and control method thereof
CN113085659B (en) * 2021-04-30 2022-05-31 重庆长安新能源汽车科技有限公司 Electric automobile, power battery pulse heating system and heating method
CN114094901B (en) * 2021-11-30 2023-05-02 重庆长安新能源汽车科技有限公司 Motor rotor position control method in pulse heating process of power battery

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