CN114103669A - Power control method of automobile range extender - Google Patents
Power control method of automobile range extender Download PDFInfo
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- CN114103669A CN114103669A CN202111481234.9A CN202111481234A CN114103669A CN 114103669 A CN114103669 A CN 114103669A CN 202111481234 A CN202111481234 A CN 202111481234A CN 114103669 A CN114103669 A CN 114103669A
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- power
- range extender
- soc value
- output power
- vehicle
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- 239000004606 Fillers/Extenders Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000007599 discharging Methods 0.000 claims description 10
- 239000013589 supplement Substances 0.000 claims description 8
- 238000010248 power generation Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
- B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a power control method of an automobile range extender, which comprises the following steps: setting four working intervals of the power battery, wherein the SOC value of the first working interval is 20% -100%, the SOC value of the second working interval is 15% -20%, the SOC value of the third working interval is 10% -15%, and the SOC value of the fourth working interval is 0% -10%; dividing output power intervals of range extenders according to the working intervals of the power battery, and enabling each working interval to correspond to the output power interval of one range extender; and acquiring the current SOC value of the power battery, and controlling the output power of the range extender according to the current SOC value. The invention can improve the use efficiency of the range extender and prolong the service life of the power battery.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a power control method of an automobile range extender.
Background
The electric automobile has the advantages of high energy efficiency, no exhaust emission, low noise and the like, and is more and more emphasized by people under the condition of dual crisis of energy and environment in the world at present, and has been greatly developed in recent years. However, the pure electric vehicle currently faces the problems of low energy density of the lithium battery pack, short service life of the battery and the like, and the driving range cannot meet the requirement of long-distance driving and daily driving range of the bus.
In order to solve the problem that the driving range of the pure electric vehicle is short, the range extender starts with operation, the range extender can provide extra electric energy to enable the vehicle to obtain a longer driving distance as the name suggests, when the electric quantity of the electric vehicle is sufficient, the range extender is in a closed state, and the electric vehicle performs a pure electric working mode; when the electric quantity of the electric automobile is insufficient, the range extender is turned on to supplement electric energy for the electric automobile. The performance of the range extender influences the performance of the electric automobile, and the existing range extender only has a single working condition mode and performs single power output in the process of driving the generator to supply power, but cannot meet various different working states and corresponding power requirements of the driving motor, so that the range extender has the defects of high oil consumption and low charging efficiency.
Disclosure of Invention
The invention provides a power control method of an automobile range extender, which solves the problem of single power output of the existing automobile range extender, can improve the service efficiency of the range extender, and prolongs the service life of a power battery.
In order to achieve the above purpose, the invention provides the following technical scheme:
a power control method of an automobile range extender comprises the following steps:
setting four working intervals of the power battery, wherein the SOC value of the first working interval is 20% -100%, the SOC value of the second working interval is 15% -20%, the SOC value of the third working interval is 10% -15%, and the SOC value of the fourth working interval is 0% -10%;
dividing output power intervals of range extenders according to the working intervals of the power battery, and enabling each working interval to correspond to the output power interval of one range extender;
and acquiring the current SOC value of the power battery, and controlling the output power of the range extender according to the current SOC value.
Preferably, the method further comprises the following steps:
if the current SOC value is in the first working interval, controlling the output power of the range extender to be 0, and outputting the power by discharging a power battery so as to meet the vehicle requirement;
if the current SOC value is in the second working interval, controlling the range extender to start and output power to supplement the shortage of the power battery discharging output power;
if the current SOC value is in the third working interval, stopping discharging output of the power battery, controlling the output power of the range extender to meet the vehicle requirement, maintaining the output power of the range extender between the minimum output power and the maximum output power, and enabling the power battery to be in an electric quantity maintaining mode;
and if the current SOC value is in the fourth working interval, controlling the output power of the range extender to be maintained between the minimum output power and the maximum output power, and charging the power battery.
Preferably, the method further comprises the following steps:
and acquiring the required power of the vehicle, and starting the range extender and outputting power to supplement the shortage of the output power of the power battery if the required power of the vehicle is greater than the discharge power of the power battery.
Preferably, the method further comprises the following steps:
and when the current SOC value is in a fourth working interval, if the required power of the vehicle is greater than the maximum output power of the range extender, reducing the output power of the driving motor to limit the requirement of the vehicle.
Preferably, the method further comprises the following steps:
and when the current SOC value is in the fourth working interval, acquiring the charging demand power of the power battery, and controlling the output power of the range extender to be equal to the sum of the vehicle demand power and the charging demand power.
Preferably, the method further comprises the following steps:
and when the current SOC value is in the fourth working interval, controlling the range extender to charge the power battery, and enabling the SOC value of the power battery to be increased to the third working interval.
Preferably, the minimum output power of the range extender is the minimum power generation power, and the maximum output power of the range extender is the maximum power generation power.
The invention provides a power control method of a range extender of an automobile, which is characterized in that an output power interval of the range extender is set according to the SOC range of a power battery, and the output power of the range extender is controlled according to the current SOC value of the power battery, so that the problem of single power output of the conventional range extender of the automobile is solved, the service efficiency of the range extender can be improved, and the service life of the power battery is prolonged.
Drawings
In order to more clearly describe the specific embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below.
Fig. 1 is a schematic diagram of a power control method of an automobile range extender provided by the invention.
Fig. 2 is a schematic diagram of the division of the working space provided by the present invention.
Detailed Description
In order to make the technical field of the invention better understand the scheme of the embodiment of the invention, the embodiment of the invention is further described in detail with reference to the drawings and the implementation mode.
The problem that the range extender used by the current automobile adopts single power output is solved. The invention provides a power control method of an automobile range extender, which solves the problem of single power output of the existing automobile range extender, can improve the service efficiency of the range extender, and prolongs the service life of a power battery.
As shown in fig. 1, a power control method of a range extender of an automobile includes:
s1: four working intervals of the power battery are set, the SOC value of the first working interval is 20% -100%, the SOC value of the second working interval is 15% -20%, the SOC value of the third working interval is 10% -15%, and the SOC value of the fourth working interval is 0% -10%.
S2: and dividing output power intervals of the range extender according to the working intervals of the power battery, so that each working interval corresponds to the output power interval of one range extender.
S3: and acquiring the current SOC value of the power battery, and controlling the output power of the range extender according to the current SOC value.
Specifically, the following operation sections are divided according to the SOC of the power battery, as shown in fig. 2.
When the SOC of the power battery is more than 20%, a first working interval is marked, and the output power of the high-voltage battery in the interval can meet the power requirement of the vehicle. When the SOC of the power battery is between 20% and 15%, the SOC can be recorded as a second working interval, the output power of the high-voltage battery in the second working interval can partially meet the power requirement of the vehicle, and when the output power of the high-voltage battery cannot meet the power requirement of the vehicle, the range extender needs to be started to supplement insufficient power. And when the SOC of the power battery is between 15% and 10%, recording as a third working interval. In the interval, the vehicle power requirement is mainly met by the range extender, and the high-voltage battery is required to be used for carrying out instantaneous power balance during dynamic transition, so that the SOC of the battery is maintained in the interval. And when the SOC of the high-voltage battery is lower than 10%, recording as a fourth working interval. In this interval, the vehicle demand power is satisfied by the range extender, and the high-voltage battery is charged. The method takes the vehicle required power and the battery SOC as control parameters to control the output power of the range extender, meets the vehicle power requirement, improves the use efficiency of the output electric power of the range extender, keeps the SOC of the high-voltage battery in a reasonable interval and prolongs the service life of the high-voltage battery.
The method further comprises the following steps:
and if the current SOC value is in the first working interval, controlling the output power of the range extender to be 0, and outputting the power by discharging a power battery so as to meet the vehicle requirement.
And if the current SOC value is in the second working interval, controlling the range extender to start and output power to supplement the shortage of the power battery discharge output power.
And if the current SOC value is in the third working interval, stopping discharging output of the power battery, controlling the output power of the range extender to meet the vehicle requirement, maintaining the output power of the range extender between the minimum output power and the maximum output power, and enabling the power battery to be in an electric quantity maintaining mode.
And if the current SOC value is in the fourth working interval, controlling the output power of the range extender to be maintained between the minimum output power and the maximum output power, and charging the power battery.
In practical application, when the current SOC value of the power battery is in a first working interval, the power requirement of the whole vehicle is met by the power battery, the range extender is not started, the output power of the range extender is 0, the power requirement of the vehicle is met by the high-voltage battery, and the high-voltage battery is in a power consumption mode.
When the current SOC value of the power battery is in a second working interval, the discharging power of the power battery is reduced, the required power of the vehicle is mainly met by the high-voltage battery, when the required power of the vehicle is larger than the discharging power requirement of the power battery (such as large accelerator acceleration), the range extender is started, insufficient power is supplemented by the range extender, at the moment, the output power of the range extender is maintained between the minimum output power and the maximum output power, and the high-voltage battery is in a power consumption mode.
When the current SOC value of the power battery is in a third working interval, the vehicle required power is met by the main range extender, the range extender is started, and the output power of the range extender is maintained between the minimum output power and the maximum output power. When the vehicle is in dynamic transition (acceleration and deceleration), the power battery performs power balance, the SOC is used as a target to calculate the charging power requirement of the high-voltage battery, the SOC dynamic balance of the high-voltage battery is maintained, and the high-voltage battery is in an electric quantity maintaining mode.
And when the current SOC value of the power battery is in the fourth working interval, the required power of the vehicle is met by the range extender, the range extender is started, and the output power of the range extender is maintained between the minimum output power and the maximum output power. And calculating the charging power requirement of the high-voltage battery by taking the SOC as a target, ensuring that the high-voltage battery is only charged and not discharged, and increasing the SOC of the high-voltage battery to a third working interval.
The method further comprises the following steps: and acquiring the required power of the vehicle, and starting the range extender and outputting power to supplement the shortage of the output power of the power battery if the required power of the vehicle is greater than the discharge power of the power battery.
The method further comprises the following steps: and when the current SOC value is in a fourth working interval, if the required power of the vehicle is greater than the maximum output power of the range extender, reducing the output power of the driving motor to limit the requirement of the vehicle.
The method further comprises the following steps: and when the current SOC value is in the fourth working interval, acquiring the charging demand power of the power battery, and controlling the output power of the range extender to be equal to the sum of the vehicle demand power and the charging demand power.
The method further comprises the following steps: and when the current SOC value is in the fourth working interval, controlling the range extender to charge the power battery, and enabling the SOC value of the power battery to be increased to the third working interval.
Further, the minimum output power of the range extender is the minimum power generation power, and the maximum output power of the range extender is the maximum power generation power.
The invention provides a power control method of an automobile range extender, which is characterized in that an output power interval of the range extender is set according to the SOC range of a power battery, the output power of the range extender is controlled according to the current SOC value of the power battery, the problem of single power output of the conventional automobile range extender is solved, the service efficiency of the range extender can be improved, and the service life of the power battery is prolonged.
The construction, features and functions of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the present invention is not limited to the embodiments shown in the drawings, and all equivalent embodiments modified or modified by the spirit and scope of the present invention should be protected without departing from the spirit of the present invention.
Claims (7)
1. A power control method of an automobile range extender is characterized by comprising the following steps:
setting four working intervals of the power battery, wherein the SOC value of the first working interval is 20% -100%, the SOC value of the second working interval is 15% -20%, the SOC value of the third working interval is 10% -15%, and the SOC value of the fourth working interval is 0% -10%;
dividing output power intervals of range extenders according to the working intervals of the power battery, and enabling each working interval to correspond to the output power interval of one range extender;
and acquiring the current SOC value of the power battery, and controlling the output power of the range extender according to the current SOC value.
2. The power control method of the range extender of the vehicle of claim 1, further comprising:
if the current SOC value is in the first working interval, controlling the output power of the range extender to be 0, and outputting the power by discharging a power battery so as to meet the vehicle requirement;
if the current SOC value is in the second working interval, controlling the range extender to start and output power to supplement the shortage of the power battery discharging output power;
if the current SOC value is in the third working interval, stopping discharging output of the power battery, controlling the output power of the range extender to meet the vehicle requirement, maintaining the output power of the range extender between the minimum output power and the maximum output power, and enabling the power battery to be in an electric quantity maintaining mode;
and if the current SOC value is in the fourth working interval, controlling the output power of the range extender to be maintained between the minimum output power and the maximum output power, and charging the power battery.
3. The power control method of the range extender of the vehicle of claim 2, further comprising:
and acquiring the required power of the vehicle, and starting the range extender and outputting power to supplement the shortage of the output power of the power battery if the required power of the vehicle is greater than the discharge power of the power battery.
4. The power control method of the range extender of the vehicle of claim 3, further comprising:
and when the current SOC value is in a fourth working interval, if the required power of the vehicle is greater than the maximum output power of the range extender, reducing the output power of the driving motor to limit the requirement of the vehicle.
5. The power control method of the range extender of the vehicle of claim 4, further comprising:
and when the current SOC value is in the fourth working interval, acquiring the charging demand power of the power battery, and controlling the output power of the range extender to be equal to the sum of the vehicle demand power and the charging demand power.
6. The power control method of the range extender of the vehicle of claim 5, further comprising:
and when the current SOC value is in the fourth working interval, controlling the range extender to charge the power battery, and enabling the SOC value of the power battery to be increased to the third working interval.
7. The method of claim 6, wherein the minimum output power of the range extender is a minimum generated power and the maximum output power of the range extender is a maximum generated power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111481234.9A CN114103669A (en) | 2021-12-06 | 2021-12-06 | Power control method of automobile range extender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111481234.9A CN114103669A (en) | 2021-12-06 | 2021-12-06 | Power control method of automobile range extender |
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| Publication Number | Publication Date |
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| CN114103669A true CN114103669A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111481234.9A Pending CN114103669A (en) | 2021-12-06 | 2021-12-06 | Power control method of automobile range extender |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117755152A (en) * | 2024-02-22 | 2024-03-26 | 潍柴动力股份有限公司 | Power generation power adjustment method and device of range-extending system |
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| CN103419675A (en) * | 2013-09-05 | 2013-12-04 | 安徽江淮汽车股份有限公司 | Range-extended electric vehicle operation method |
| DE102019103366A1 (en) * | 2018-02-13 | 2019-08-14 | Ford Global Technologies, Llc | SYSTEM AND METHOD FOR A RANGE EXTENDER ENGINE OF A HYBRID ELECTRIC VEHICLE |
| CN111361450A (en) * | 2020-02-28 | 2020-07-03 | 浙江吉利新能源商用车集团有限公司 | Range extender control method, device, equipment and storage medium |
| CN112009454A (en) * | 2020-08-20 | 2020-12-01 | 江西五十铃汽车有限公司 | Method for optimizing oil consumption of extended range hybrid electric vehicle |
| WO2021120798A1 (en) * | 2019-12-16 | 2021-06-24 | 金龙联合汽车工业（苏州）有限公司 | Energy control method for hybrid bus using hydrogen fuel battery and traction battery |
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2021
- 2021-12-06 CN CN202111481234.9A patent/CN114103669A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103419675A (en) * | 2013-09-05 | 2013-12-04 | 安徽江淮汽车股份有限公司 | Range-extended electric vehicle operation method |
| DE102019103366A1 (en) * | 2018-02-13 | 2019-08-14 | Ford Global Technologies, Llc | SYSTEM AND METHOD FOR A RANGE EXTENDER ENGINE OF A HYBRID ELECTRIC VEHICLE |
| WO2021120798A1 (en) * | 2019-12-16 | 2021-06-24 | 金龙联合汽车工业（苏州）有限公司 | Energy control method for hybrid bus using hydrogen fuel battery and traction battery |
| CN111361450A (en) * | 2020-02-28 | 2020-07-03 | 浙江吉利新能源商用车集团有限公司 | Range extender control method, device, equipment and storage medium |
| CN112009454A (en) * | 2020-08-20 | 2020-12-01 | 江西五十铃汽车有限公司 | Method for optimizing oil consumption of extended range hybrid electric vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117755152A (en) * | 2024-02-22 | 2024-03-26 | 潍柴动力股份有限公司 | Power generation power adjustment method and device of range-extending system |
| CN117755152B (en) * | 2024-02-22 | 2024-05-17 | 潍柴动力股份有限公司 | Power generation power adjustment method and device of range-extending system |
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