CN116331067A - Self-heating control method and device for power battery, medium and automobile - Google Patents
Self-heating control method and device for power battery, medium and automobile Download PDFInfo
- Publication number
- CN116331067A CN116331067A CN202310090644.3A CN202310090644A CN116331067A CN 116331067 A CN116331067 A CN 116331067A CN 202310090644 A CN202310090644 A CN 202310090644A CN 116331067 A CN116331067 A CN 116331067A
- Authority
- CN
- China
- Prior art keywords
- self
- power battery
- heating
- motor
- waveform frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 238000004590 computer program Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- 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
-
- 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
- B60L2240/545—Temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a self-heating control method and device for a power battery, a medium and an automobile, wherein the method comprises the following steps: when the self-heating condition is met, determining the waveform frequency in real time by adopting a random frequency conversion algorithm; generating a voltage control signal with amplitude variation according to the waveform frequency; and controlling the motor in real time according to the voltage control signal so as to realize self-heating of the power battery. According to the technical scheme, motor noise in the self-heating process of the power battery is reduced.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a self-heating control method and device for a power battery, a medium and an automobile.
Background
Power cells are an important component of electric vehicles that are used to power electric vehicles. The performance of the power battery is susceptible to temperature, for example, when the air temperature is reduced, the internal resistance of the power battery is increased sharply, the discharging voltage platform is reduced, and the terminal voltage of the battery is reduced rapidly, so that the available capacity and power of the battery are greatly reduced.
In order to ensure the performance of the power battery, the following method is often adopted to heat the power battery in a low-temperature environment: one is to add a heating device to heat the power battery, but adding the heating device to the power battery not only increases the volume of the power battery, but also increases the hardware cost. The other is that the motor controller controls the motor current to realize the self-heating of the power battery, but the square wave signal adopted by the motor controller controls the motor, so that the noise of the motor is large and the heating is serious in the self-heating process of the power battery.
Disclosure of Invention
The invention solves the problem of how to effectively heat the power battery.
In order to solve the problems, the invention provides a self-heating control method and device for a power battery, a medium and an automobile.
In a first aspect, the present invention provides a method for controlling self-heating of a power battery, including:
when the self-heating condition is met, determining the waveform frequency in real time by adopting a random frequency conversion algorithm;
generating a voltage control signal with amplitude variation according to the waveform frequency;
and controlling the motor in real time according to the voltage control signal so as to realize self-heating of the power battery.
Optionally, the generating the voltage control signal with the amplitude varying according to the waveform frequency includes:
determining a d-axis voltage signal of the motor according to the waveform frequency, and enabling a q-axis voltage signal of the motor to be zero;
performing Park conversion according to the d-axis voltage signal and the q-axis voltage signal to obtain an alpha-axis voltage signal and a beta-axis voltage signal;
and generating a voltage control signal according to the alpha-axis voltage signal and the beta-axis voltage signal based on a space vector pulse width modulation method.
Optionally, the d-axis voltage signal is a sine wave signal, and determining the d-axis voltage signal of the motor according to the waveform frequency includes:
and determining a sine wave amplitude value according to the waveform frequency, and generating the d-axis voltage signal according to the waveform frequency and the sine wave amplitude value.
Optionally, the determining the sine wave amplitude value according to the waveform frequency includes:
and determining the corresponding sine wave amplitude according to the preset power and the waveform frequency.
Optionally, the self-heating condition includes the temperature of the power battery being lower than a preset temperature and the vehicle operating condition meeting a preset operating condition.
Optionally, before the waveform frequency is determined in real time by adopting the random frequency conversion algorithm, the power battery self-heating control method further comprises the following steps: initializing a rotor position of the motor.
Optionally, after the motor is controlled in real time according to the voltage control signal, the power battery self-heating control method further includes:
and stopping adopting the voltage control signal to control the motor in real time when the temperature of the power battery reaches the preset temperature and/or the working condition of the vehicle does not meet the preset working condition, so as to stop self-heating of the power battery.
In a second aspect, the present invention provides a self-heating control device for a power battery, comprising:
the processing module is used for determining the waveform frequency in real time by adopting a random frequency conversion algorithm when the self-heating condition is met; generating a voltage control signal with amplitude variation according to the waveform frequency;
and the control module is used for controlling the motor in real time according to the voltage control signal so as to realize self-heating of the power battery.
In a third aspect, the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the power cell self-heating control method according to any one of the first aspects.
In a fourth aspect, the present invention provides an automobile comprising a memory and a processor;
the memory is used for storing a computer program;
the processor is configured to implement the power battery self-heating control method according to any one of the first aspects when executing the computer program.
The self-heating control method and device for the power battery, the medium and the automobile have the beneficial effects that: when the power battery, the vehicle and the like meet the self-heating condition, the self-heating condition can be specifically set according to actual situation requirements, a random frequency conversion algorithm is adopted to randomly determine real-time waveform frequency, and a voltage control signal with amplitude change is generated according to the waveform frequency. The motor is controlled in real time by adopting the voltage control signal, the power battery is charged and discharged continuously by utilizing the inductance characteristic of the motor winding, alternating current is generated on the high-voltage bus, joule heat is generated through the internal resistance of the power battery, and the self-heating of the power battery is realized. Because the external heating device is not needed, the hardware cost can be controlled, and because the voltage control signal adopts the randomly determined waveform frequency and the amplitude changes in real time, the noise spectrum concentration generated in the motor operation process can be avoided, the motor noise is effectively reduced, and the NVH (Noise, vibration, harshness, noise, vibration and acoustic vibration roughness) effect in the self-heating process of the power battery is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art power battery management system;
fig. 2 is a schematic flow chart of a self-heating control method of a power battery according to an embodiment of the invention;
FIG. 3 is a control strategy block diagram of a power battery self-heating control method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a self-heating control device for a power battery according to an embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. While the invention is susceptible of embodiment in the drawings, it is to be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided to provide a more thorough and complete understanding of the invention. It should be understood that the drawings and embodiments of the invention are for illustration purposes only and are not intended to limit the scope of the present invention.
It should be understood that the various steps recited in the method embodiments of the present invention may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the invention is not limited in this respect.
The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "alternative embodiments". Related definitions of other terms will be given in the description below. It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between different devices, modules, or units and not for limiting the order or interdependence of the functions performed by such devices, modules, or units.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those skilled in the art will appreciate that "one or more" is intended to be construed as "one or more" unless the context clearly indicates otherwise.
The names of messages or information interacted between the devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of such messages or information.
In the prior art, a PTC (Positive Temperature Coefficient ) heating scheme is generally adopted, that is, a PTC heating waterway is used, and heat is transferred to a battery through waterway circulation, so that the power battery is heated from a housing to an inner core. On the basis, a metal foil heating plate can be arranged in the power battery to solve the problem of uneven heating of the PTC heating scheme and increase the heating speed. However, the PTC heating waterway and the heating sheet are additionally arranged in the method, so that the volume and the cost of the power battery are increased.
In the prior art, a method for heating the power battery by adding a peripheral hardware loop is also provided, and the power battery is heated by starting and stopping a switching device and a power device in the loop, so that a capacitive element in the loop and a motor winding inductance form an LC oscillating circuit to continuously generate high-frequency alternating current. However, this method requires additional peripheral hardware circuits, which increases hardware costs.
In the prior art, a method for realizing self-heating of the power battery by controlling motor current through a motor controller is also available, and the power battery is heated by controlling the motor through alternating current which is square wave to magnetize and demagnetize the motor. However, this method causes the motor to operate with loud noise and severe heat generation.
As shown in fig. 1, the power battery management system of the electric automobile comprises a control system, a battery management system, a motor controller and a three-phase motor, wherein a first end of the battery management system is used for collecting data such as temperature, current and voltage of a power battery, a second end of the battery management system is connected with a first end of the control system, a second end of the control system is connected with a first end of a control module, a power input end of the control module is used for being electrically connected with the power battery, a power output end of the control module is electrically connected with the three-phase motor, and a second end of the control module is used for collecting data such as rotating speed, temperature and current of the three-phase motor.
As shown in fig. 2, the self-heating control method for a power battery provided by the embodiment of the invention includes:
and step S100, when the self-heating condition is met, determining the waveform frequency in real time by adopting a random frequency conversion algorithm.
Optionally, the self-heating condition includes the temperature of the power battery being lower than a preset temperature and the vehicle operating condition meeting a preset operating condition.
Specifically, the preset operating conditions may include the vehicle being in a stopped state, the vehicle being in a charged state, and the like. The real-time waveform frequency is determined through a random frequency conversion algorithm, and particularly, one waveform frequency can be randomly determined every preset time length, and adjacent waveform frequencies are different. The waveform frequency may be randomly determined within a predetermined waveform frequency range.
Step 200, generating a voltage control signal with variable amplitude according to the waveform frequency.
Specifically, a voltage control signal is generated from the waveform frequency, the voltage control signal employing the randomly determined waveform frequency and having a continuously varying amplitude.
And step S300, controlling the motor in real time according to the voltage control signal so as to realize self-heating of the power battery.
Specifically, the motor may be a permanent magnet synchronous motor or an asynchronous motor, and the power battery may be any rechargeable battery such as a lithium battery, a lead-acid battery, a nickel-hydrogen battery, and the like, and may be a battery cell, a battery module, or a battery pack.
According to the voltage control signal, the motor is controlled through a FOC (Field Oriented Control magnetic field directional control) strategy, an oscillation loop is formed by the inductance of the electronic stator winding, the bus capacitor and the power battery, the inductance characteristic of the motor winding is continuously utilized to circularly charge and discharge the power battery, alternating current with positive and negative changes is generated on a high-voltage bus between the power battery and the motor controller, and the internal resistance of a battery cell of the power battery is large under the low-temperature condition, so that joule heat is continuously generated in the battery cell of the power battery, and the self-heating of the power battery is realized. The high-frequency alternating current is generated at the high-voltage bus in the self-heating process, heat is generated from the inside of the battery core of the power battery, and the self-heating uniformity of the power battery is improved while the safety of the power battery is ensured.
In this embodiment, when the power battery, the vehicle, and the like satisfy the self-heating condition, the self-heating condition may be specifically set according to the actual situation, a random frequency conversion algorithm is used to randomly determine a real-time waveform frequency, and a voltage control signal with a variable amplitude is generated according to the waveform frequency. The motor is controlled in real time by adopting the voltage control signal, the power battery is charged and discharged continuously by utilizing the inductance characteristic of the motor winding, alternating current is generated on the high-voltage bus, joule heat is generated through the internal resistance of the power battery, and the self-heating of the power battery is realized. Because the external heating device is not needed, the hardware cost can be controlled, and because the voltage control signal adopts the randomly determined waveform frequency and the amplitude changes in real time, the noise spectrum concentration generated in the motor operation process can be avoided, the motor noise is effectively reduced, and the NVH (Noise, vibration, harshness, noise, vibration and acoustic vibration roughness) effect in the self-heating process of the power battery is improved.
Optionally, as shown in fig. 3, the generating the voltage control signal with a varying amplitude according to the waveform frequency includes:
and determining a d-axis voltage signal UdReq of the motor according to the waveform frequency, and enabling the q-axis voltage signal UqReq of the motor to be zero.
In particular, the d-axis voltage signal UdReq adopts the waveform frequency of the high frequency, which may be more than 800Hz in particular. The q-axis voltage UqReq is constant at 0.
And performing Park conversion according to the d-axis voltage signal UdReq and the q-axis voltage signal UqReq to obtain an alpha-axis voltage signal Ualpha and a beta-axis voltage signal Ubeta.
Specifically, the d-axis voltage signal and the q-axis voltage signal in the dq coordinate system are converted into the α -axis voltage signal and the β -axis voltage signal in the α - β coordinate system by Park (Park) conversion.
And generating a voltage control signal according to the alpha-axis voltage signal Ualpha and the beta-axis voltage signal Ubeta based on a space vector pulse width modulation method.
Specifically, based on SVPWM (Space Vector Pulse Width Modulation, space vector pulse width modulation method), voltage signals Ua, ub and Uc of each electrical phase of the motor, i.e., duty cycle signals, are calculated from an α -axis voltage signal Ua and a β -axis voltage signal Ubeta, and each single-phase voltage signal constitutes a voltage control signal.
Optionally, the d-axis voltage signal is a sine wave signal, and determining the d-axis voltage signal of the motor according to the waveform frequency includes:
and determining a sine wave amplitude value according to the waveform frequency, and generating the d-axis voltage signal according to the waveform frequency and the sine wave amplitude value.
In this alternative embodiment, the d-axis voltage signal is a sine wave signal, which can reduce the motor noise when the power battery is self-heated, compared with the square wave signal in the prior art. The sine wave signal adopts randomly determined waveform frequency and changed sine wave amplitude, namely the sine wave frequency and the sine wave amplitude of the d-axis voltage signal are changed in real time, so that the distribution interval of a noise spectrum can be changed, the noise spectrum is prevented from being concentrated, the noise of a motor is effectively reduced, and the NVH effect of the power battery in the self-heating process can be improved.
Optionally, the determining the sine wave amplitude value according to the waveform frequency includes:
and determining the corresponding sine wave amplitude according to the preset power and the waveform frequency.
Specifically, the sine wave amplitude may be calculated from the correspondence between power, frequency, and amplitude.
The motor power can be detected in real time in the control process, and when the motor power is lower than the preset power, the motor power can be increased by increasing the sine wave amplitude. When the motor power is higher than the preset power, the motor power may be reduced by reducing the sine wave amplitude.
In this optional embodiment, through the dynamic adjustment to motor power, can adjust power battery's self-heating effect, make power battery's self-heating more accurate and effective. When the temperature of the motor is higher, the motor power can be reduced by reducing the amplitude of the voltage control signal, so that the motor is prevented from overheating. And through real-time detection and control to motor power, can avoid the overheated risk of motor, improve the security.
Optionally, before the waveform frequency is determined in real time by adopting the random frequency conversion algorithm, the power battery self-heating control method further comprises the following steps: initializing a rotor position of the motor.
In the alternative embodiment, the rotor position of the motor is initialized before the self-heating of the power battery is controlled, so that the temperature of the motor is conveniently controlled in the self-heating process of the power battery. Avoid the motor overheated, lead to producing the inefficacy risk.
Optionally, after the motor is controlled in real time according to the voltage control signal, the power battery self-heating control method further includes:
and stopping adopting the voltage control signal to control the motor in real time when the temperature of the power battery reaches the preset temperature and/or the working condition of the vehicle does not meet the preset working condition, so as to stop self-heating of the power battery.
In this optional embodiment, when the temperature of the power battery reaches the preset temperature, the self-heating of the power battery is stopped, so as to avoid the influence of overheat of the power battery on the performance and safety of the power battery. Or the working condition of the vehicle does not meet the preset working condition, for example, when the vehicle is started or the vehicle is charged, the self-heating of the power battery is stopped, the adverse effect on the normal running of the vehicle is avoided, and the safety of the vehicle is improved.
As shown in fig. 4, a self-heating control device for a power battery according to an embodiment of the present invention includes:
the processing module is used for determining the waveform frequency in real time by adopting a random frequency conversion algorithm when the self-heating condition is met; generating a voltage control signal with amplitude variation according to the waveform frequency;
and the control module is used for controlling the motor in real time according to the voltage control signal so as to realize self-heating of the power battery.
The power battery self-heating control device of the present embodiment is used to implement the power battery self-heating control method described above, and its advantages compared to the prior art are the same as those of the power battery self-heating control method described above, and are not described herein again.
Optionally, the processing module is specifically configured to: determining a d-axis voltage signal of the motor according to the waveform frequency, and enabling a q-axis voltage signal of the motor to be zero; performing Park conversion according to the d-axis voltage signal and the q-axis voltage signal to obtain an alpha-axis voltage signal and a beta-axis voltage signal; and generating a voltage control signal according to the alpha-axis voltage signal and the beta-axis voltage signal based on a space vector pulse width modulation method.
Optionally, the d-axis voltage signal is a sine wave signal, and the processing module is specifically further configured to: and determining a sine wave amplitude value according to the waveform frequency, and generating the d-axis voltage signal according to the waveform frequency and the sine wave amplitude value.
Optionally, the processing module is specifically further configured to: and determining the corresponding sine wave amplitude according to the preset power and the waveform frequency.
Optionally, the self-heating condition includes the temperature of the power battery being lower than a preset temperature and the vehicle operating condition meeting a preset operating condition.
Optionally, the system further comprises an initialization module, wherein the initialization module is used for: initializing a rotor position of the motor.
Optionally, the control module is further configured to: and stopping adopting the voltage control signal to control the motor in real time when the temperature of the power battery reaches the preset temperature and/or the working condition of the vehicle does not meet the preset working condition, so as to stop self-heating of the power battery.
Another embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which when executed by a processor, implements the power battery self-heating control method as described above.
In another embodiment of the invention, an automobile includes a memory and a processor; the memory is used for storing a computer program; the processor is configured to implement the power battery self-heating control method as described above when executing the computer program.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or the like. In this application, the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present invention. In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the disclosure.
Claims (10)
1. A power battery self-heating control method, characterized by comprising:
when the self-heating condition is met, determining the waveform frequency in real time by adopting a random frequency conversion algorithm;
generating a voltage control signal with amplitude variation according to the waveform frequency;
and controlling the motor in real time according to the voltage control signal so as to realize self-heating of the power battery.
2. The power cell self-heating control method according to claim 1, wherein the generating a voltage control signal of varying amplitude according to the waveform frequency comprises:
determining a d-axis voltage signal of the motor according to the waveform frequency, and enabling a q-axis voltage signal of the motor to be zero;
performing Park conversion according to the d-axis voltage signal and the q-axis voltage signal to obtain an alpha-axis voltage signal and a beta-axis voltage signal;
and generating a voltage control signal according to the alpha-axis voltage signal and the beta-axis voltage signal based on a space vector pulse width modulation method.
3. The power battery self-heating control method according to claim 2, wherein the d-axis voltage signal is a sine wave signal, and the determining the d-axis voltage signal of the motor according to the waveform frequency includes:
and determining a sine wave amplitude value according to the waveform frequency, and generating the d-axis voltage signal according to the waveform frequency and the sine wave amplitude value.
4. The power cell self-heating control method according to claim 3, wherein said determining a sine wave amplitude value from said waveform frequency comprises:
and determining the corresponding sine wave amplitude according to the preset power and the waveform frequency.
5. The power battery self-heating control method according to any one of claims 1 to 4, characterized in that the self-heating condition includes a temperature of the power battery being lower than a preset temperature and a vehicle operating condition satisfying a preset operating condition.
6. The power cell self-heating control method according to any one of claims 1 to 4, wherein before the waveform frequency is determined in real time using a random frequency conversion algorithm, the power cell self-heating control method further comprises: initializing a rotor position of the motor.
7. The power battery self-heating control method according to any one of claims 1 to 4, characterized in that after the motor is controlled in real time according to the voltage control signal, the power battery self-heating control method further comprises:
and stopping adopting the voltage control signal to control the motor in real time when the temperature of the power battery reaches the preset temperature and/or the working condition of the vehicle does not meet the preset working condition, so as to stop self-heating of the power battery.
8. A power battery self-heating control device, characterized by comprising:
the processing module is used for determining the waveform frequency in real time by adopting a random frequency conversion algorithm when the self-heating condition is met; generating a voltage control signal with amplitude variation according to the waveform frequency;
and the control module is used for controlling the motor in real time according to the voltage control signal so as to realize self-heating of the power battery.
9. A computer-readable storage medium, characterized in that the storage medium has stored thereon a computer program which, when executed by a processor, implements the power battery self-heating control method according to any one of claims 1 to 7.
10. An automobile, comprising a memory and a processor;
the memory is used for storing a computer program;
the processor for implementing the power battery self-heating control method according to any one of claims 1 to 7 when executing the computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310090644.3A CN116331067A (en) | 2023-01-17 | 2023-01-17 | Self-heating control method and device for power battery, medium and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310090644.3A CN116331067A (en) | 2023-01-17 | 2023-01-17 | Self-heating control method and device for power battery, medium and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116331067A true CN116331067A (en) | 2023-06-27 |
Family
ID=86881278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310090644.3A Pending CN116331067A (en) | 2023-01-17 | 2023-01-17 | Self-heating control method and device for power battery, medium and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116331067A (en) |
-
2023
- 2023-01-17 CN CN202310090644.3A patent/CN116331067A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Modulated model-free predictive control with minimum switching losses for PMSM drive system | |
| JP7263628B2 (en) | Permanent magnet motor control method, device, power system and electric vehicle | |
| CN112133987A (en) | Heating control method and device for power battery | |
| JP7563685B2 (en) | MOTOR, MOTOR CONTROLLER, HEAT EXCHANGE SYSTEM, AND CONTROL METHOD | |
| CN113183826A (en) | Battery heating method and device based on bus resonance and vehicle | |
| WO2023082475A1 (en) | Heating circuit of battery assembly and heating method for heating circuit | |
| Wen et al. | Comparative evaluation of DC-link capacitors for electric vehicle application | |
| Lee et al. | Novel variable switching frequency PWM strategy for a SiC-MOSFET-based electric vehicle inverter to increase battery usage time | |
| CN114649971A (en) | System and method for increasing battery temperature | |
| CN116331067A (en) | Self-heating control method and device for power battery, medium and automobile | |
| US20230130303A1 (en) | Control method, device, power system and electric vehicle | |
| WO2024027065A1 (en) | Vehicle battery heating method and apparatus, and vehicle and electronic device | |
| JP2021136738A (en) | Switching device control method and switching device control system | |
| CN105164913A (en) | Drive device for rotary electric machine | |
| CN108988372B (en) | Power control method and device for hybrid energy storage system of direct-drive wind turbine generator | |
| CN114172438B (en) | Permanent magnet synchronous motor control method and related equipment | |
| Karvonen et al. | Co-simulation and harmonic analysis of a hybrid vehicle traction system | |
| US11418143B2 (en) | Control method and apparatus, power system, and electric vehicle | |
| US20240286493A1 (en) | Apparatus comprising an inverter | |
| CN118700899A (en) | Battery heating circuit, control method, controller, power system and electric equipment | |
| CN110620741B (en) | Carrier modulation method, device and storage medium | |
| CN117681730A (en) | Distributed power assembly for electric vehicle and electric vehicle | |
| CN116032191A (en) | Motor self-heating method, motor controller and vehicle | |
| CN115593275A (en) | Heating control method and device for power battery of electric automobile and electric automobile | |
| Damarla et al. | Integration of Renewable Energy Resources to EV Using Sensor Less Control and Regenerative Braking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |