CN111577502B - Control method of hybrid electric vehicle starting device - Google Patents
Control method of hybrid electric vehicle starting device Download PDFInfo
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- CN111577502B CN111577502B CN202010284677.8A CN202010284677A CN111577502B CN 111577502 B CN111577502 B CN 111577502B CN 202010284677 A CN202010284677 A CN 202010284677A CN 111577502 B CN111577502 B CN 111577502B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
- F02N11/0866—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery comprising several power sources, e.g. battery and capacitor or two batteries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0825—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/10—Safety devices
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- 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
- Y02T10/62—Hybrid vehicles
Abstract
The invention discloses a hybrid electric vehicle starting device, which comprises a bidirectional voltage conversion module, a first voltage conversion module, a second voltage conversion module and a first voltage conversion module, wherein the bidirectional voltage conversion module is used for converting low voltage output by a low-voltage vehicle-mounted battery into high voltage of a second voltage in a reverse working state and converting the high voltage output by a high-voltage battery into low voltage in a forward working state; the power judgment module is used for responding to the starting signal to judge whether the discharge power of the high-voltage battery is lower than the minimum power required by the starting of the engine; the switch control module is used for controlling the on-off of the controllable switch group when the discharge power of the high-voltage battery is lower than the minimum power required by the starting of the engine; and the motor control module is used for controlling the driving motor. The invention provides a hybrid electric vehicle starting device, which is characterized in that a bidirectional voltage conversion module is controlled to convert low voltage of a low-voltage vehicle-mounted battery into high voltage, high-voltage discharge is carried out, and the high voltage is supplied to a driving motor for starting an engine.
Description
Technical Field
The invention relates to the field of hybrid vehicles, in particular to a hybrid vehicle starting device, a control method and a vehicle.
Background
At present, the global warming is continuously increased, and the environmental protection pressure is gradually increased. The increasingly stringent requirements of governments over engine oil vehicle emissions and fuel consumption have led automobile manufacturers to strive to improve overall vehicle system efficiency. With the continuous enhancement of the environmental protection concept of consumers, the proportion of new energy vehicles in the market shows a rapid rising trend. Wherein, compare in pure electric and traditional fuel vehicle, oil-electricity hybrid vehicle has received consumer's liking with its good duration, economic nature, dynamic property and driving comfort.
One important function of the hybrid electric vehicle is to control the engine to stop and start according to the running condition of the vehicle. The existing hybrid technical scheme is mainly to start the engine by a 12V starter and a motor. However, below-30 degrees, the cell discharge capacity of the power battery is limited. There are some hybrid vehicles not equipped with a 12V starter, and the power battery is limited in a low temperature environment of minus 30 degrees or below, or the engine cannot be started when the power battery fails.
Therefore, in order to solve the above problems, it is necessary to provide a hybrid vehicle starting apparatus, a control method, and a vehicle capable of converting a low voltage of a low-voltage on-board battery into a high voltage by controlling a bidirectional voltage conversion module.
Disclosure of Invention
In order to solve the technical problems, the invention provides a hybrid vehicle starting device which is simple in structure, low in cost and light in weight, and can convert low voltage of a low-voltage vehicle-mounted battery into high voltage by controlling a bidirectional voltage conversion module to perform high-voltage discharge and provide the high voltage discharge for a driving motor to start an engine.
The technical effects of the invention are realized as follows:
a hybrid vehicle starting apparatus comprising: the master controller comprises a power judgment module and a switch control module; the bidirectional voltage conversion module is used for converting low voltage of first voltage output by the low-voltage vehicle-mounted battery into high voltage of second voltage in a reverse working state and converting high voltage of the second voltage output by the high-voltage battery into low voltage of the first voltage in a forward working state; the power judgment module is used for responding to the starting signal to judge whether the discharge power of the high-voltage battery is lower than the minimum power required by the starting of the engine; the switch control module is used for controlling the on-off of the controllable switch group when the discharge power of the high-voltage battery is lower than the minimum power required by the starting of the engine; the motor control module is used for controlling the driving motor; the low-voltage vehicle-mounted battery is electrically connected with one end of the bidirectional voltage conversion module, the other end of the bidirectional voltage conversion module and the high-voltage battery are both sequentially connected with the controllable switch group and the inverter and electrically connected with the driving motor, the low-voltage vehicle-mounted battery and the high-voltage battery are both electrically connected with the power judgment module, the power judgment module is respectively electrically connected with the bidirectional voltage conversion module, the switch control module and the motor control module, the motor control module is in communication connection with the inverter, the driving motor is used for connecting and starting an engine, and the motor control module is electrically connected with the switch control module.
Furthermore, the master controller further comprises a discharge power calculation module group, the discharge power calculation module group comprises a first power calculation module and a second power calculation module, the input end of the first power calculation module is electrically connected with the high-voltage battery, the input end of the second power calculation module is electrically connected with the low-voltage vehicle-mounted battery, and the output end of the first power calculation module and the output end of the second power calculation module are both electrically connected with the power judgment module.
Further, the power control device also comprises an alarm device which is electrically connected with the power judgment module.
Furthermore, the controllable switch group comprises a first switch and a second switch, two ends of the first switch are respectively and electrically connected with the high-voltage battery and the inverter, two ends of the second switch are respectively and electrically connected with the bidirectional voltage conversion module and the inverter, and the switch control module is respectively and electrically connected with the first switch and the second switch.
Further, the low-voltage vehicle-mounted battery is a 12V lead-acid storage battery.
Further, the first switch, and/or the second switch is a relay or a single pole single throw switch.
Further, the bidirectional voltage conversion module comprises a bidirectional voltage conversion controller and a bidirectional voltage converter, an input end of the bidirectional voltage conversion controller is electrically connected with the power judgment module, an output end of the bidirectional voltage conversion controller is electrically connected with the bidirectional voltage converter, and the low-voltage vehicle-mounted battery is electrically connected with the second switch through the bidirectional voltage converter.
In another aspect, the present application also provides a control method of a hybrid vehicle starting apparatus, the method being used for controlling the hybrid vehicle starting apparatus, the method including:
acquiring a starting signal of starting;
responding to the engine starting signal, and acquiring high-voltage battery information and low-voltage vehicle-mounted battery information;
according to the high-voltage battery information and the low-voltage vehicle-mounted battery information, calculating to obtain the discharge power of the high-voltage battery and the discharge power which can be provided by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module;
judging whether the discharge power of the high-voltage battery is greater than the minimum power required by the starting of the engine;
if yes, controlling the high-voltage battery to supply power to the driving motor through the inverter, and starting the engine through the driving motor;
if not, judging whether the discharging power which can be provided by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module is larger than the minimum power required by the starting of the engine or not;
if so, controlling the bidirectional voltage conversion module to convert the working state into a reverse working state, supplying power to a driving motor by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module and the inverter, and starting the engine through the driving motor;
if not, judging whether the sum of the discharge power of the high-voltage battery and the discharge power which can be provided by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module is larger than the minimum power required by the starting of the engine or not;
if so, controlling the bidirectional voltage conversion module to convert the working state into a reverse working state, supplying power to the driving motor by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module and the high-voltage battery together through the inverter, and starting the engine through the driving motor;
if not, the alarm device is controlled to give an alarm.
Further, the high-voltage battery supplies power to the driving motor, specifically, the first switch is controlled to be closed, and the second switch is controlled to be opened; the low-voltage vehicle-mounted battery supplies power to the driving motor through the bidirectional voltage conversion module, and particularly controls the second switch to be switched on and the first switch to be switched off; the low-voltage vehicle-mounted battery supplies power to the driving motor through the bidirectional voltage conversion module and the high-voltage battery together, and particularly controls the first switch and the second switch to be closed.
On the other hand, the application also provides a vehicle comprising the control method of the hybrid vehicle starting device.
As described above, the present invention has the following advantageous effects:
1) The invention provides a hybrid electric vehicle starting device, which converts low voltage of a low-voltage vehicle-mounted battery into high voltage by controlling a bidirectional voltage conversion module, carries out high-voltage discharge, and provides the high-voltage discharge for a driving motor to start an engine, and has the advantages of simple structure, light weight and low cost;
2) The 12V lead-acid battery with better discharging capacity under the condition of low temperature is adopted, so that the starting stability of the vehicle is improved;
3) According to the invention, the high-voltage power obtained by the bidirectional voltage conversion module in a reverse direction and the discharge power obtained by the high-voltage battery are superposed to supply power to the driving motor to start the engine, so that the problem that the engine cannot be started due to the limited discharge capacity or failure of the high-voltage battery is avoided to a great extent.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art it is also possible to derive other drawings from these drawings without inventive effort.
FIG. 1 is a schematic block diagram of a hybrid vehicle starting device according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a control method in the embodiment of the present application.
Wherein the reference numerals correspond to:
the system comprises a 1-bidirectional voltage conversion module, a 2-power judgment module, a 3-switch control module, a 4-motor control module, a 5-low-voltage vehicle-mounted battery, a 6-high-voltage battery, a 7-first power calculation module, a 8-second power calculation module, a 9-controllable switch group, a 91-first switch, a 92-second switch, a 10-alarm device, a 11-driving motor, a 12-motor and a 13-inverter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1:
a hybrid electric vehicle starting device is shown in figure 1 and comprises a master controller, wherein the master controller comprises a power judgment module 2 and a switch control module 3; a bidirectional voltage conversion module 1 for converting a low voltage of a first voltage output from the low-voltage on-vehicle battery 5 into a high voltage of a second voltage in a reverse operation state, and converting a high voltage of the second voltage output from the high-voltage battery 6 into a low voltage of the first voltage in a forward operation state; the power judgment module 2 is used for responding to the starting signal to judge whether the discharge power of the high-voltage battery 6 is lower than the minimum power required by the starting of the engine 12; the switch control module 3 is used for controlling the on-off of the controllable switch group 9 when the discharge power of the high-voltage battery 6 is lower than the minimum power required by the starting of the engine 12; the motor control module 4 is used for controlling the driving motor 11; the low-voltage vehicle-mounted battery 5 is electrically connected with one end of the bidirectional voltage conversion module 1, the other end of the bidirectional voltage conversion module 1 and the high-voltage battery 6 are electrically connected with the driving motor 11 sequentially through the controllable switch group 9 and the inverter 13, the low-voltage vehicle-mounted battery 5 and the high-voltage battery 6 are electrically connected with the power judgment module 2, the power judgment module 2 is electrically connected with the bidirectional voltage conversion module 1, the switch control module and the motor control module 4 respectively, the motor control module 4 is in communication connection with the inverter 13, and the driving motor 11 is used for connecting and starting the engine 12.
Furthermore, the master controller further comprises a discharge power calculation module group, the discharge power calculation module group comprises a first power calculation module 7 and a second power calculation module 8, the input end of the first power calculation module 7 is electrically connected with the high-voltage battery 6, the input end of the second power calculation module 8 is electrically connected with the low-voltage vehicle-mounted battery 5, and the output end of the first power calculation module 7 and the output end of the second power calculation module 8 are electrically connected with the power judgment module 2.
Further, an alarm device 10 is also included, and the alarm device 10 is electrically connected with the power judgment module 2.
Further, the controllable switch group 9 includes a first switch 91 and a second switch 92, two ends of the first switch 91 are electrically connected to the high-voltage battery 6 and the inverter 13, respectively, two ends of the second switch 92 are electrically connected to the bidirectional voltage conversion module 1 and the inverter 13, respectively, and the switch control module 3 is electrically connected to the first switch 91 and the second switch 92, respectively. Specifically, the first switch or the second switch is a relay.
Further, the low-voltage vehicle-mounted battery 5 is a 12V lead-acid battery. Because the discharge capacity of the battery core of the power battery is limited below minus 30 ℃, the discharge capacity of the 12V lead-acid battery at low temperature is better than that of the power batteries such as a ternary lithium battery, a nickel-metal hydride battery and lithium iron phosphate, and therefore, the 12V lead-acid battery with better discharge capacity at low temperature is adopted, and the starting stability of the vehicle is improved.
Further, the bidirectional voltage conversion module 1 includes a bidirectional voltage conversion controller and a bidirectional voltage converter, an input end of the bidirectional voltage conversion controller is electrically connected to the power determination module 2, an output end of the bidirectional voltage conversion controller is electrically connected to the bidirectional voltage converter, and the low-voltage vehicle-mounted battery 5 is electrically connected to the second switch 92 through the bidirectional voltage converter.
In addition, as shown in fig. 2, an embodiment of the present application further provides a control method for a hybrid vehicle starting apparatus, where the method is used to control the hybrid vehicle starting apparatus, and the method specifically includes:
s1, acquiring a starting signal;
s2, responding to the engine starting signal, and acquiring high-voltage battery information and low-voltage vehicle-mounted battery information;
s3, according to the high-voltage battery information and the low-voltage vehicle-mounted battery information, the power calculation module calculates to obtain the discharge power of the high-voltage battery and the discharge power which can be provided by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module;
s4, judging whether the discharge power of the high-voltage battery is greater than the minimum power required by starting the engine;
s5, if yes, controlling the first switch to be closed and the second switch to be opened, enabling the high-voltage battery to supply power to the driving motor through the inverter, and controlling the driving motor to start the engine;
s6, if not, judging whether the discharge power which can be provided by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module is larger than the minimum power required by the starting of the engine or not;
s7, if yes, controlling the bidirectional voltage conversion module to convert the working state into a reverse working state, controlling the second switch to be closed and the first switch to be disconnected, enabling the low-voltage vehicle-mounted battery to supply power to the driving motor through the bidirectional voltage conversion module and the inverter, and controlling the driving motor to start the engine;
s8, if not, judging whether the sum of the discharge power of the high-voltage battery and the discharge power provided by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module is greater than the minimum power required by starting the engine or not;
s9, if yes, controlling the bidirectional voltage conversion module to convert the working state into a reverse working state and controlling the first switch and the second switch to be closed, so that the low-voltage vehicle-mounted battery supplies power to the driving motor through the bidirectional voltage conversion module and the high-voltage battery together through the inverter, and the driving motor is controlled to start the engine;
and S10, if not, controlling an alarm device to give an alarm for reminding a driver that the vehicle cannot be started normally.
The invention provides a hybrid electric vehicle starting device, which converts low voltage of a low-voltage vehicle-mounted battery into high voltage by controlling a bidirectional voltage conversion module, performs high-voltage discharge, and provides the high-voltage discharge for a driving motor to start an engine.
Example 2:
the present embodiment is different from embodiment 1 in a controllable switch. In this embodiment, the controllable switch group 9 includes a first switch 91 and a second switch 92, two ends of the first switch 91 are electrically connected to the high-voltage battery 6 and the inverter 13, two ends of the second switch 92 are electrically connected to the bidirectional voltage conversion module 1 and the inverter 13, and the switch control module 3 is electrically connected to the first switch 91 and the second switch 92. Specifically, the first switch or the second switch is a single pole, single throw switch.
Through the above specific embodiments, the following technical effects are achieved:
the invention provides a hybrid electric vehicle starting device, which converts low voltage of a low-voltage vehicle-mounted battery into high voltage by controlling a bidirectional voltage conversion module, performs high-voltage discharge, and provides the high-voltage discharge for a driving motor for starting an engine, and has the advantages of simple structure, light weight and low cost; the 12V lead-acid battery with better discharging capacity under the condition of low temperature is adopted, so that the starting stability of the vehicle is improved; according to the invention, the high-voltage power obtained by the bidirectional voltage conversion module in the reverse direction and the discharge power obtained by the high-voltage battery are superposed to supply power to the driving motor to start the engine, so that the problem that the engine cannot be started due to the limited discharge capacity or failure of the high-voltage battery is avoided to a great extent.
Although the present invention has been described in connection with the preferred embodiments, it is not intended to be limited to the embodiments described herein, and various changes and modifications may be made without departing from the scope of the invention.
The embodiments and features of the embodiments described herein above can be combined with each other without conflict.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A control method of a hybrid vehicle starting apparatus, characterized in that the control method is implemented based on a hybrid vehicle starting apparatus, the apparatus comprising:
the system comprises a master controller, a power control module and a power control module, wherein the master controller comprises a power judgment module (2), a switch control module (3) and a discharge power calculation module group, and the discharge power calculation module group comprises a first power calculation module (7) and a second power calculation module (8);
the bidirectional voltage conversion module (1) is used for converting low voltage of first voltage output by the low-voltage vehicle-mounted battery (5) into high voltage of second voltage in a reverse working state and converting high voltage of the second voltage output by the high-voltage battery (6) into low voltage of the first voltage in a forward working state;
the power judgment module (2) is used for responding to the starting signal to judge whether the discharge power of the high-voltage battery (6) is lower than the minimum power required by the starting of the engine (12);
the switch control module (3) is used for controlling the on-off of the controllable switch group (9) when the discharge power of the high-voltage battery (6) is lower than the minimum power required by the starting of the engine (12);
a motor control module (4) for controlling the drive motor (11);
the low-voltage vehicle-mounted battery (5) is electrically connected with one end of the bidirectional voltage conversion module (1), the other end of the bidirectional voltage conversion module (1) and the high-voltage battery (6) are electrically connected with the driving motor (11) sequentially through the controllable switch group (9) and the inverter (13), the low-voltage vehicle-mounted battery (5) and the high-voltage battery (6) are electrically connected with the power judgment module (2), the power judgment module (2) is respectively electrically connected with the bidirectional voltage conversion module (1), the switch control module (3) and the motor control module (4), the motor control module (4) is in communication connection with the inverter (13), the driving motor (11) is used for connecting and starting an engine (12), the input end of the first power calculation module (7) is electrically connected with the high-voltage battery (6), the input end of the second power calculation module (8) is electrically connected with the low-voltage vehicle-mounted battery (5), and the output end of the first power calculation module (7) and the output end of the second power calculation module (8) are electrically connected with the power judgment module (2);
the control method is applied to an overall controller and comprises the following steps:
acquiring an engine starting signal;
responding to the engine starting signal, and acquiring high-voltage battery information and low-voltage vehicle-mounted battery information;
according to the high-voltage battery information and the low-voltage vehicle-mounted battery information, calculating to obtain the discharge power of the high-voltage battery and the discharge power of the low-voltage vehicle-mounted battery, which can be provided by the bidirectional voltage conversion module;
judging whether the discharge power of the high-voltage battery is greater than the minimum power required by the starting of the engine or not;
if yes, controlling the high-voltage battery to supply power to the driving motor, and starting the engine through the driving motor;
if not, judging whether the discharge power which can be provided by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module is larger than the minimum power required by the starting of the engine or not;
if so, controlling the bidirectional voltage conversion module to convert the working state into a reverse working state, supplying power to the driving motor by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module, and starting the engine through the driving motor;
if not, judging whether the sum of the discharge power of the high-voltage battery and the discharge power which can be provided by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module is larger than the minimum power required by the starting of the engine or not;
if so, controlling the bidirectional voltage conversion module to convert the working state into a reverse working state, supplying power to the driving motor by the low-voltage vehicle-mounted battery through the bidirectional voltage conversion module and the high-voltage battery together, and starting the engine through the driving motor;
if not, the alarm device is controlled to give an alarm.
2. The method according to claim 1, further comprising an alarm device (10), said alarm device (10) being electrically connected to said power determination module (2).
3. The method according to claim 1, characterized in that the controllable switch group (9) comprises a first switch (91) and a second switch (92), both ends of the first switch (91) are electrically connected with the high voltage battery (6) and the inverter (13), respectively, both ends of the second switch (92) are electrically connected with the bidirectional voltage conversion module (1) and the inverter (13), respectively, and the switch control module (3) is electrically connected with the first switch (91) and the second switch (92), respectively.
4. The method according to claim 1, characterized in that the low-voltage on-board battery (5) is a 12V lead-acid battery.
5. A method according to claim 3, characterized in that the first switch (91) and/or the second switch (92) is a relay or a single pole single throw switch.
6. The method according to claim 3, characterized in that the bidirectional voltage conversion module (1) comprises a bidirectional voltage conversion controller and a bidirectional voltage converter, an input terminal of the bidirectional voltage conversion controller is electrically connected with the power determination module (2), an output terminal of the bidirectional voltage conversion controller is electrically connected with the bidirectional voltage converter, and the low-voltage on-board battery (5) is electrically connected with the second switch (92) through the bidirectional voltage converter.
7. The method according to claim 3, wherein the high voltage battery supplies power to the drive motor, in particular to control the first switch to be closed and the second switch to be open; the low-voltage vehicle-mounted battery supplies power to the driving motor through the bidirectional voltage conversion module, and particularly controls the second switch to be switched on and the first switch to be switched off; the low-voltage vehicle-mounted battery supplies power to the driving motor through the bidirectional voltage conversion module and the high-voltage battery together, and particularly controls the first switch and the second switch to be closed.
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| CN112319248B (en) * | 2020-11-17 | 2022-04-26 | 睿驰电装(大连)电动系统有限公司 | Method and device for controlling starting of engine of extended range electric vehicle |
| CN114483413A (en) * | 2022-02-18 | 2022-05-13 | 中国第一汽车股份有限公司 | Engine starting method of light mixing system, light mixing system and storage medium |
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