CN115051078B - Battery alternating-current heating circuit and electric vehicle - Google Patents
Battery alternating-current heating circuit and electric vehicle Download PDFInfo
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- CN115051078B CN115051078B CN202210927967.9A CN202210927967A CN115051078B CN 115051078 B CN115051078 B CN 115051078B CN 202210927967 A CN202210927967 A CN 202210927967A CN 115051078 B CN115051078 B CN 115051078B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 67
- 238000004804 winding Methods 0.000 claims abstract description 125
- 230000003068 static effect Effects 0.000 claims abstract description 6
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- 238000010586 diagram Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
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- 238000004891 communication Methods 0.000 description 3
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Classifications
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Control Of Ac Motors In General (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The application provides a battery alternating current heating circuit and electric motor car, wherein, battery alternating current heating circuit includes: the power supply comprises a driving motor, a three-phase inverter circuit, a first battery and a second battery; the first battery and the second battery are electrically connected in series; the first phase winding of the driving motor is connected with the second phase winding of the three-phase motor, and the third phase winding of the three-phase motor is connected with the midpoints of the first battery and the second battery; the three-phase inverter circuit is connected with the driving motor and connected with the first battery and the second battery, wherein when the driving motor is in a static state, the three-phase inverter circuit controls the current of the driving motor, so that a third phase winding of the driving motor outputs alternating current to the first battery and the second battery, and when the driving motor is in an operating state, three phases of the three-phase inverter circuit output current meeting the torque output requirement of the driving motor to the driving motor. According to the method and the device, battery heating can be achieved by utilizing the internal resistance of the battery under the stationary and running states of the vehicle.
Description
Technical Field
The application relates to the field of battery heating devices, in particular to a battery alternating-current heating circuit and an electric vehicle.
Background
New energy automobile power batteries have poor low temperature performance, and therefore it is necessary to try to raise the battery temperature at low temperatures. The current technical proposal is as follows: 1. the battery is heated by the cold area liquid after the cold area liquid is heated by methods such as a thermal ceramic resistor (PTC), heat generation of an electric drive system and the like, so that indirect heating is realized; 2. the motor controller is used for realizing the charge and discharge of the motor winding, so that alternating current is generated in the battery, and the battery is heated by the heat generated by the internal resistance of the battery, namely the internal resistance of the battery is directly heated.
However, the indirect heating method has a disadvantage of low efficiency in which a large amount of heat is not efficiently transferred to the battery; the heat transfer is slow, the heat is required to be input into the battery through cold area liquid, the external structure of the battery and the like, and the temperature rise of the battery is slow; the battery is heated unevenly, and the temperature of the battery core near the cold area liquid rises fast.
On the other hand, the existing battery internal resistance heating scheme (such as the battery heating system of the patent CN110962631B and the control method thereof) adopts the charge and discharge of the motor winding to excite the bus alternating current, and the method can only be used for the situation that the stationary motor of the vehicle is not rotated, and is difficult to be applied to the running working condition of the vehicle.
Disclosure of Invention
An object of the embodiment of the application is to provide a battery alternating current heating circuit and an electric vehicle, which are used for realizing battery heating by utilizing the internal resistance of a battery under the static and running states of the vehicle.
In a first aspect, the present invention provides a battery ac heating circuit comprising:
the power supply comprises a driving motor, a three-phase inverter circuit, a first battery and a second battery;
the first battery and the second battery are electrically connected in series;
the first phase winding of the driving motor is connected with the second phase winding of the three-phase motor, and the third phase winding of the three-phase motor is connected with the midpoints of the first battery and the second battery;
the three-phase inverter circuit is connected with the driving motor and is connected with the first battery and the second battery, wherein when the driving motor is in a static state, the three-phase inverter circuit controls the current of the driving motor, so that a third phase winding of the driving motor outputs alternating current to the first battery and the second battery, and when the driving motor is in an operating state, the three-phase position of the three-phase inverter circuit outputs current meeting the torque output requirement of the driving motor to the driving motor, and the amplitude of the current meeting the torque output requirement of the driving motor meets the heating requirement of the first battery and the second battery.
In the first aspect of the application, the first battery and the second battery are electrically connected in series, and the first phase winding of the drive motor is connected with the second phase winding of the three-phase motor, and the third phase winding of the three-phase motor is connected with the midpoints of the first battery and the second battery; the three-phase inverter circuit is connected with the driving motor and connected with the first battery and the second battery, so that when the driving motor is in a static state, the three-phase inverter circuit controls the current of the driving motor to enable a third phase winding of the driving motor to output alternating current to the first battery and the second battery, and when the driving motor is in an operating state, three phases of the three-phase inverter circuit output currents meeting the torque output requirements of the driving motor to the driving motor, wherein the amplitude of the currents meeting the torque output requirements of the driving motor meets the heating requirements of the first battery and the second battery, and the circuit can realize effective heating of the batteries no matter whether a vehicle runs or not.
In an alternative embodiment, the battery alternating current heating circuit further comprises a first control relay and a second control relay, wherein one end of the first control relay is connected with a first phase winding of the driving motor, and the other end of the first control relay is connected with a third phase winding of the driving motor;
one end of the second control relay is connected with a third phase winding of the driving motor, and the other end of the second control relay is connected with the midpoints of the first battery and the second battery;
and when the first battery and the second battery do not need to be heated, the first control relay is closed, and the second control relay is opened.
In this alternative embodiment, when the first battery and the second battery do not need to be heated, since the second control relay is opened, the third phase winding of the driving motor cannot output ac current to the first battery and the second battery, and thus the first battery and the second battery cannot be heated by the ac current, and at the same time, since the first control relay is closed, the third phase winding of the driving motor can be connected with the first phase winding and the second phase winding of the driving motor and form a loop.
In a first aspect of the present application, as an optional implementation manner, the battery ac heating circuit further includes a third battery and a fourth battery, where the third battery and the fourth battery are connected in series;
the first phase winding of the driving motor is electrically connected with the midpoints of the third battery and the fourth battery.
In this alternative embodiment, the first phase winding of the driving motor is electrically connected to the midpoints of the third battery and the fourth battery, so that the first phase winding and the second phase winding of the driving motor can be used to output alternating currents to the third battery and the fourth battery, thereby heating the third battery and the fourth battery.
In a first aspect of the present application, as an optional implementation manner, the battery ac heating circuit further includes a third control relay, one end of the third control relay is connected to the first phase winding of the driving motor, and the other end of the third control relay is connected to a midpoint between the third battery and the fourth battery, where when the third battery and the fourth battery do not need to be heated, the third control relay is disconnected.
In this alternative embodiment, the third control relay is turned off, so that the first phase winding and the second phase winding of the driving motor cannot output alternating current to the third battery and the fourth battery, and the third battery and the fourth battery stop heating.
In a first aspect of the present application, as an optional implementation manner, the battery ac heating circuit further includes a fifth battery and a sixth battery, where the fifth battery and the sixth battery are connected in series, and the second phase winding of the driving motor is connected to a midpoint between the fifth battery and the sixth battery.
In the present alternative embodiment, the second phase winding of the drive motor is connected to the midpoint between the fifth battery and the sixth battery, so that an ac current can be output to the fifth battery and the sixth battery by the second phase winding of the drive motor, and the fifth battery and the sixth battery can be heated based on the ac current.
In a first aspect of the present application, as an optional implementation manner, the battery ac heating circuit further includes a fourth control relay, where the fourth control relay is configured to connect the first phase winding of the driving motor to the third phase winding of the driving motor, or to connect the first phase winding of the driving motor to the second phase winding of the driving motor, or to connect the second phase winding of the driving motor to the first phase winding of the driving motor.
In a first aspect of the present application, as an optional implementation manner, the battery ac heating circuit further includes a fifth control relay, wherein, when the four control relays are used to connect the first phase winding of the driving motor to the third phase winding of the driving motor, the fifth control relay is used to connect the second phase winding of the driving motor to the third phase winding of the driving motor;
when the four control relays are used to connect the first phase winding of the drive motor to the second phase winding of the drive motor, the fifth control relay is used to connect the third phase winding of the drive motor to the second phase winding of the drive motor;
the fifth control relay is configured to connect the second phase winding of the drive motor to the first phase winding of the drive motor when the four control relays are configured to connect the second phase winding of the drive motor to the first phase winding of the drive motor;
and when the fifth battery and the sixth battery do not need to be heated, the fourth control relay is opened, and the fifth control relay is closed.
In a first aspect of the present application, as an alternative implementation manner, the first battery and the second battery form a first battery group, the third battery and the fourth battery form a second battery group, the fifth battery and the sixth battery form a third battery group, and the second battery group and the third battery group are connected with the first battery group in parallel;
and the battery alternating-current heating circuit further comprises a main switch and a negative switch, wherein one end of the main switch is connected with the positive electrode end of the first battery pack, the other end of the main switch is connected with the three-phase inverter circuit, one end of the negative switch is connected with the negative electrode end of the first battery pack, and the other end of the negative switch is connected with the three-phase inverter circuit.
In this alternative embodiment, the first battery pack, the second battery pack, and the third battery pack can be controlled to supply or stop supplying power to the driving motor through the three-phase inverter circuit by the negative switch and the main switch.
In an alternative embodiment, the negative switch and the main switch are both relays.
In a second aspect, the present invention provides an electric vehicle comprising a battery ac heating circuit according to any one of the preceding embodiments.
The electric vehicle in the second aspect can realize effective heating of the battery in both a stationary state and a running state.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a battery ac heating circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another battery AC heating circuit according to an embodiment of the present application
FIG. 3 is a schematic diagram of a battery alternating current heating circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a battery ac heating circuit according to another embodiment of the present disclosure.
Icon: 100-driving a motor; 200-three-phase inverter circuit; u1-a first battery; u2-a second battery; k1-a first control relay; k2-second control relay.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery ac heating circuit according to an embodiment of the present application. As shown in fig. 1, the battery ac heating circuit of the embodiment of the present application includes:
the driving motor 100, the three-phase inverter circuit 200, the first battery U1 and the second battery U2;
the first battery U1 and the second battery U2 are electrically connected in series;
the first phase winding of the driving motor 100 is connected with the second phase winding of the three-phase motor, and the third phase winding of the three-phase motor is connected with the middle points of the first battery U1 and the second battery U2;
the three-phase inverter circuit 200 is connected with the driving motor 100 and is connected with the first battery U1 and the second battery U2, wherein when the driving motor is in a static state, the three-phase inverter circuit 200 controls the third phase winding of the motor to output alternating current to the first battery U1 and the second battery U2, and when the driving motor is in an operating state, the three-phase position of the three-phase inverter circuit 200 outputs current meeting the torque requirement of the driving motor 100 to the driving motor 100, and at the moment, the current of the third phase winding flows through the first battery U1 and the second battery U2, so that the first battery U1 and the second battery U2 are heated. The magnitude of the current satisfying the torque output requirement of the driving motor 100 satisfies the heating requirements of the first battery U1 and the second battery U2.
In the embodiment of the application, the first battery U1 and the second battery U2 are electrically connected in series, and the first phase winding of the driving motor 100 is connected to the second phase winding of the three-phase motor, and the third phase winding of the three-phase motor is connected to the midpoint of the first battery U1 and the second battery U2; the three-phase inverter circuit 200 is connected to the driving motor 100 and to the first battery U1 and the second battery U2, so that when the driving motor is in a stationary state, the three-phase inverter circuit controls the third-phase winding of the driving motor to output an ac current to the first battery U1 and the second battery U2, specifically, the power switching transistor of the three-phase inverter circuit operates to control the current in the third-phase winding of the driving motor, so that the third-phase winding of the driving motor outputs an ac current to the first battery U1 and the second battery U2. Further, the current in the third phase winding may be PWM modulated ac current, wherein the fundamental frequency of the PWM modulated ac current is not greater than half the switching frequency of the power switching tube. Alternatively, the current in the third phase winding may be derived based on switching ripple generated by the switching of the inverter power, wherein the fundamental frequency of the current is equal to the switching frequency
When the driving motor is in an operating state, the three phases of the three-phase inverter circuit 200 output currents satisfying the torque output requirement of the driving motor 100 to the driving motor 100, and the currents of the third phase winding flow through the first battery U1 and the second battery U2 at this time, thereby heating the batteries. Since the heating effect can be ensured only by a sufficiently large current, the amplitude of the current meeting the torque output requirement of the driving motor 100 is selected as much as possible to meet the heating requirements of the first battery U1 and the second battery U2 on the premise of preferentially ensuring the torque requirement, and such a selection is also a well-known knowledge in the motor control field.
And finally, whether the vehicle runs or not, the circuit can realize effective heating of the battery.
In an embodiment of the present application, as an alternative, referring to fig. 2, fig. 2 is a schematic structural diagram of another battery ac heating circuit provided in the embodiment of the present application. As shown in fig. 2, the battery alternating-current heating circuit further comprises a first control relay K1 and a second control relay K2, wherein one end of the first control relay K1 is connected with a first phase winding of the driving motor 100, and the other end of the first control relay K1 is connected with a third phase winding of the driving motor 100;
one end of the second control relay K2 is connected with a third phase winding of the driving motor 100, and the other end of the second control relay K2 is connected with the middle points of the first battery U1 and the second battery U2;
and when the first battery U1 and the second battery U2 do not need to be heated, the first control relay is closed, and the second control relay K2 is opened.
In this alternative embodiment, when the first battery U1 and the second battery U2 do not need to be heated, since the second control relay K2 is opened, the third phase winding of the driving motor 100 cannot output an ac current to the first battery U1 and the second battery U2, and thus the first battery U1 and the second battery U2 cannot be heated by the ac current, and at the same time, since the first control relay K1 is closed, the third phase winding of the driving motor 100 can be connected to the first phase winding of the driving motor 100 and form a loop.
In the embodiment of the present application, referring to fig. 3 as an alternative implementation, fig. 3 is a schematic structural diagram of another battery ac heating circuit disclosed in the embodiment of the present application. As shown in fig. 3, the battery ac heating circuit of the embodiment of the present application further includes a third battery and a fourth battery, wherein the third battery and the fourth battery are connected in series;
the first phase winding of the drive motor 100 is electrically connected to the midpoints of the third and fourth batteries.
In the present alternative embodiment, the first phase winding of the driving motor 100 is electrically connected to the midpoints of the third battery and the fourth battery, and thus the first phase winding and the second phase winding of the driving motor 100 can be used to output ac currents to the third battery and the fourth battery, thereby heating the third battery and the fourth battery.
In this embodiment of the present application, preferably, when the three-phase inverter circuit controls the current of the driving motor, the waveform phase amplitude of the two currents of the U1U2 battery pack and the U2U3 battery pack may be controlled to be the same, and the phase difference is 180 ° so that the total sum current of the three-phase inflow battery pack passing through the driving motor at any moment is zero, and thus, the current of the heating battery may not flow through the high-voltage total positive bus and the high-voltage total negative bus, and further, the dc high-voltage bus voltage may not fluctuate, and remain stable.
In this embodiment, as an alternative implementation manner, the battery ac heating circuit further includes a third control relay, one end of the third control relay is connected to the first phase winding of the driving motor 100, and the other end of the third control relay is connected to a midpoint of the third battery and the fourth battery, where the third control relay is turned off when the third battery and the fourth battery do not need to be heated.
In this alternative embodiment, the third control relay is turned off, so that the first phase winding and the second phase winding of the motor 100 cannot output alternating current to the third battery and the fourth battery, and the third battery and the fourth battery are stopped from being heated.
In the embodiment of the present application, referring to fig. 4 as an alternative implementation, fig. 4 is a schematic structural diagram of another battery ac heating circuit disclosed in the embodiment of the present application. As shown in fig. 4, the battery ac heating circuit further includes a fifth battery and a sixth battery, wherein the fifth battery and the sixth battery are connected in series, and the second phase winding of the driving motor 100 is connected to midpoints of the fifth battery and the sixth battery.
In the present alternative embodiment, the second phase winding of the drive motor 100 is connected to the midpoint between the fifth battery and the sixth battery, so that the second phase winding of the drive motor 100 can be used to output an ac current to the fifth battery and the sixth battery, and the fifth battery and the sixth battery can be heated based on the ac current.
In this optional embodiment, preferably, when the three-phase inverter circuit controls the current of the driving motor, the phase difference of the ac current of the U1U2 battery pack, the U3U4 battery pack and the U4U5 battery pack may be controlled to be 120 °, so that the total current flowing into the battery pack from three phases of the driving motor at any moment is zero, and thus, the current of the heating battery may not flow through the high-voltage total positive bus and the high-voltage total negative bus, and further, the dc high-voltage bus voltage may not fluctuate and remain stable. In an embodiment of the present application, as an alternative implementation, the battery ac heating circuit further includes a fourth control relay for connecting the first phase winding of the driving motor to the third phase winding of the driving motor, or for connecting the first phase winding of the driving motor to the second phase winding of the driving motor, or for connecting the second phase winding of the driving motor to the first phase winding of the driving motor.
Further, the battery alternating-current heating circuit further includes a fifth control relay, wherein, when the four control relays are used to connect the first phase winding of the driving motor to the third phase winding of the driving motor, the fifth control relay is used to connect the second phase winding of the driving motor to the third phase winding of the driving motor; when the fourth control relay is used to connect the first phase winding of the drive motor to the second phase winding of the drive motor, the fifth control relay is used to connect the third phase winding of the drive motor to the second phase winding of the drive motor; when the four control relay is used to connect the second phase winding of the drive motor to the first phase winding of the drive motor, the fifth control relay is used to connect the second phase winding of the drive motor to the first phase winding of the drive motor.
Further, when the fifth battery and the sixth battery do not need to be heated, the fourth control relay is opened, and the fifth control relay is closed.
In the embodiment of the present application, as an alternative implementation manner, the first battery U1 and the second battery U2 form a first battery U1 set, the third battery and the fourth battery form a second battery U2 set, the fifth battery and the sixth battery form a third battery set, and the second battery U2 set and the third battery set are connected with the first battery U1 set in parallel;
and the battery alternating-current heating circuit further comprises a main switch and a negative switch, wherein one end of the main switch is connected with the positive electrode end of the first battery U1 group, the other end of the main switch is connected with the three-phase inverter circuit 200, one end of the negative switch is connected with the negative electrode end of the first battery U1 group, and the other end of the negative switch is connected with the three-phase inverter circuit 200.
In this alternative embodiment, the first battery U1 group, the second battery U2 group, and the third battery group can be controlled to supply power to the driving motor 100 or stop supplying power to the driving motor 100 through the three-phase inverter circuit 200 by the negative switch and the main switch, and particularly, the circuit is cut off to stop the operation of the circuit in a fault state.
In an alternative embodiment, both the negative switch and the main switch are relays.
In a second aspect, the present invention provides an electric vehicle comprising a battery ac heating circuit according to any one of the preceding embodiments.
The electric vehicle in the second aspect can realize effective heating of the battery in both a stationary state and a running state.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
Further, the units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Furthermore, functional modules in various embodiments of the present application may be integrated together to form a single portion, or each module may exist alone, or two or more modules may be integrated to form a single portion.
It should be noted that the functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM) random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above is only an example of the present application, and is not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (7)
1. A battery ac heating circuit, characterized in that the battery ac heating circuit comprises:
the power supply comprises a driving motor, a three-phase inverter circuit, a first battery and a second battery;
the first battery and the second battery are electrically connected in series;
the first phase winding of the driving motor is connected with the second phase winding of the three-phase motor, and the third phase winding of the three-phase motor is connected with the midpoints of the first battery and the second battery;
the three-phase inverter circuit is connected with the driving motor and the first battery and the second battery, wherein when the driving motor is in a static state, the three-phase inverter circuit controls the current of the driving motor to enable a third phase winding of the driving motor to output alternating current to the first battery and the second battery, and when the driving motor is in an operating state, the three-phase position of the three-phase inverter circuit outputs current meeting the torque output requirement of the driving motor to the driving motor, wherein the amplitude of the current meeting the torque output requirement of the driving motor meets the heating requirement of the first battery and the second battery;
the battery alternating-current heating circuit further comprises a first control relay and a second control relay, wherein one end of the first control relay is connected with a first phase winding of the driving motor, and the other end of the first control relay is connected with a third phase winding of the driving motor;
one end of the second control relay is connected with a third phase winding of the driving motor, and the other end of the second control relay is connected with the midpoints of the first battery and the second battery;
and when the first battery and the second battery do not need to be heated, the first control relay is closed, and the second control relay is opened;
and the battery alternating-current heating circuit further comprises a third battery and a fourth battery, wherein the third battery and the fourth battery are connected in series;
the first phase winding of the driving motor is electrically connected with the midpoints of the third battery and the fourth battery;
and the battery alternating-current heating circuit further comprises a third control relay, one end of the third control relay is connected with the first phase winding of the driving motor, and the other end of the third control relay is connected with the middle points of the third battery and the fourth battery, wherein when the third battery and the fourth battery do not need to be heated, the third control relay is disconnected.
2. The battery ac heating circuit of claim 1, further comprising a fifth battery and a sixth battery, wherein the fifth battery is connected in series with the sixth battery, and wherein the second phase winding of the drive motor is connected to a midpoint of the fifth battery and the sixth battery.
3. The battery ac heating circuit of claim 2, further comprising a fourth control relay for connecting the first phase winding of the drive motor to the third phase winding of the drive motor, or for connecting the first phase winding of the drive motor to the second phase winding of the drive motor, or for connecting the second phase winding of the drive motor to the first phase winding of the drive motor.
4. The battery ac heating circuit of claim 3, further comprising a fifth control relay, wherein the fifth control relay is configured to connect the second phase winding of the drive motor to the third phase winding of the drive motor when the four control relays are configured to connect the first phase winding of the drive motor to the third phase winding of the drive motor;
when the four control relays are used to connect the first phase winding of the drive motor to the second phase winding of the drive motor, the fifth control relay is used to connect the third phase winding of the drive motor to the second phase winding of the drive motor;
the fifth control relay is configured to connect the second phase winding of the drive motor to the first phase winding of the drive motor when the four control relays are configured to connect the second phase winding of the drive motor to the first phase winding of the drive motor;
and when the fifth battery and the sixth battery do not need to be heated, the fourth control relay is opened, and the fifth control relay is closed.
5. The battery alternating current heating circuit according to claim 4, wherein the first battery and the second battery constitute a first battery group, the third battery and the fourth battery constitute a second battery group, the fifth battery and the sixth battery constitute a third battery group, and the second battery group and the third battery group are connected in parallel with the first battery group;
and the battery alternating-current heating circuit further comprises a main switch and a negative switch, wherein one end of the main switch is connected with the positive electrode end of the first battery pack, the other end of the main switch is connected with the three-phase inverter circuit, one end of the negative switch is connected with the negative electrode end of the first battery pack, and the other end of the negative switch is connected with the three-phase inverter circuit.
6. The battery ac heating circuit of claim 5, wherein said negative switch and said main switch are both relays.
7. An electric vehicle comprising a battery ac heating circuit as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210927967.9A CN115051078B (en) | 2022-08-03 | 2022-08-03 | Battery alternating-current heating circuit and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1495569A (en) * | 1976-05-12 | 1977-12-21 | Lucas Industries Ltd | Circuits for heating storage batteries |
| CN112103595A (en) * | 2020-08-31 | 2020-12-18 | 上海交通大学 | Vehicle power battery preheating device and control method thereof |
| CN113348616A (en) * | 2019-01-24 | 2021-09-03 | 株式会社综研 | Power conversion device |
| CN114566740A (en) * | 2022-04-28 | 2022-05-31 | 比亚迪股份有限公司 | Heating system of power battery and electric vehicle |
| CN114590172A (en) * | 2020-12-04 | 2022-06-07 | 比亚迪股份有限公司 | Battery energy processing device and method and vehicle |
| CN216980691U (en) * | 2022-04-28 | 2022-07-15 | 比亚迪股份有限公司 | Heating system of power battery and electric vehicle |
| CN216980690U (en) * | 2022-04-28 | 2022-07-15 | 比亚迪股份有限公司 | Heating system of power battery and electric vehicle |
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- 2022-08-03 CN CN202210927967.9A patent/CN115051078B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1495569A (en) * | 1976-05-12 | 1977-12-21 | Lucas Industries Ltd | Circuits for heating storage batteries |
| CN113348616A (en) * | 2019-01-24 | 2021-09-03 | 株式会社综研 | Power conversion device |
| CN112103595A (en) * | 2020-08-31 | 2020-12-18 | 上海交通大学 | Vehicle power battery preheating device and control method thereof |
| CN114590172A (en) * | 2020-12-04 | 2022-06-07 | 比亚迪股份有限公司 | Battery energy processing device and method and vehicle |
| CN114566740A (en) * | 2022-04-28 | 2022-05-31 | 比亚迪股份有限公司 | Heating system of power battery and electric vehicle |
| CN216980691U (en) * | 2022-04-28 | 2022-07-15 | 比亚迪股份有限公司 | Heating system of power battery and electric vehicle |
| CN216980690U (en) * | 2022-04-28 | 2022-07-15 | 比亚迪股份有限公司 | Heating system of power battery and electric vehicle |
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| CN115051078A (en) | 2022-09-13 |
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