CN103921687B - A kind of power system of electric automobile in parallel - Google Patents
A kind of power system of electric automobile in parallel Download PDFInfo
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- CN103921687B CN103921687B CN201410129116.5A CN201410129116A CN103921687B CN 103921687 B CN103921687 B CN 103921687B CN 201410129116 A CN201410129116 A CN 201410129116A CN 103921687 B CN103921687 B CN 103921687B
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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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The present invention relates to a kind of power system of electric automobile in parallel, mainly comprise driving engine, the first electrical motor, the second electrical motor, connect switching units, the first speed-changing mechanism and the second speed-changing mechanism; Driving engine is connected with the first motor rotor by interior axle; Second motor rotor is connected with gear by outer shaft; Driving engine is by the first speed-changing mechanism outputting power, and the second electrical motor is by the second speed-changing mechanism outputting power, and the first speed-changing mechanism and the second speed-changing mechanism all only have a converter speed ratio; By separation or the combination of control linkage switching units, the switching of described power system of electric automobile mode of operation can be realized; This power system has the long-distance performance of good high speed, and power system is comparatively simple, and compact conformation, cost is lower.
Description
Technical field
The invention belongs to electronlmobil field, relate to a kind of power system of electric automobile in parallel.
Background technology
In the prior art, following content is known to:
Extended-range electric vehicle is that one is furnished with vehicle mounted dynamic battery and auxiliary power unit (AuxiliaryEnergySupply, AES) pure electrically operated electronlmobil, when electric energy is sufficient, battery provides all energy needed for vehicle traveling, when electric energy is not enough, auxiliary power unit work.
Stroke-increasing electric automobile mode of operation is divided into two stages, and first stage is CD(ChargeDepleting, electric quantity consumption) stage, keep pure motor driving under this stage, in limited travelled distance, provide energy by battery; Subordinate phase is CS(ChargeSustaining, and electricity keeps) stage, under this stage, driving engine participation work, realizes the prolongation of car load continual mileage.
There are two kinds of configurations in current stroke-increasing electric automobile, comprises series connection stroke boosting electronlmobil (as AudiA1e-tron) and series-parallel connection stroke-increasing electric automobile (as ChevroletVOLT).In series connection stroke boosting battery-driven car, electrical motor is for driving propulsion source, driving engine not Direct driver vehicle, and just when electrokinetic cell electricity drops to a certain degree, driving engine just can start, and drive electrical generators generates electricity, for drive motor provides energy.Series connection stroke boosting power assembly of electric automobile is comparatively simple, and cost is lower.In series-parallel connection stroke-increasing electric automobile VOLT, in the CS stage, tandem drive during low speed driving, when running at high speed, electrical motor is combined with driving engine and is driven vehicle to travel, and under the CS stage, dynamic property and oil consumption are all better than series connection stroke boosting electronlmobil.
The most of user of China purchases car first, higher to the long-distance performance requriements of high speed.Because current battery energy density is low, pure electric vehicle can not meet the requirement of high speed long-distance running.
As above-mentioned series connection stroke boosting electronlmobil, the low power driving engine of configuration and electrical generator usually, under the CS stage, dynamic property can only meet traveling of going home.If increase the power of driving engine and electrical generator with the long-distance dynamic property of the high speed improving the CS stage, then due to energy secondary conversion loss, less economical during high speed long-distance running.So, the long-distance poor performance of series connection stroke boosting electronlmobil high speed.
Series-parallel connection stroke-increasing electric automobile dynamic property and oil consumption under the CS stage are all better than series connection stroke boosting electronlmobil, can meet the requirement of high speed long-distance running, but dynamic assembly is complicated, cost is higher.
Summary of the invention
Technical matters to be solved by this invention provides a kind of power system of electric automobile in parallel, and this power system of electric automobile in parallel is comparatively simple, and cost is lower, has the long-distance performance of good high speed.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize:
A kind of power system of electric automobile in parallel, comprises driving engine, the first electrical motor, the second electrical motor, connects switching units, inner shaft, outer shaft, the first speed-changing mechanism, the second speed-changing mechanism and main reduction gear.
Described driving engine is connected with the first motor rotor by interior axle; Second motor rotor is connected with outer shaft;
Described outer shaft is arranged on the periphery of described interior axle, and independently can rotate relative to interior axle;
When described connection switching units engages, driving engine is by the first speed-changing mechanism outputting power;
When described connection switching units is separated, driving engine and the second electrical motor work alone separately;
Described second electrical motor is by the second speed-changing mechanism outputting power;
Described first speed-changing mechanism and described second speed-changing mechanism all only have a converter speed ratio, through same output shaft outputting power to main reduction gear, then export wheel to through diff and semiaxis.
Described connection switching units is power-transfer clutch, and described power-transfer clutch is dry type clutch or liquid clutch, and it is arranged on the output shaft of the first speed-changing mechanism and the second speed-changing mechanism.
Described connection switching units is gear shift sliding hub, and it is arranged on interior axle or on the output shaft of the first speed-changing mechanism and the second speed-changing mechanism.
The first described electrical motor and the second described electrical motor homonymy configuration, and be configured on same axis.
Configure a bumper at described engine power output, play shock absorbing effect.
The second described electrical motor peak power is not only greater than car load hundred kilometers and accelerates demand power but also be greater than maximum speed demand power.
Compared with prior art the invention has the beneficial effects as follows:
When electrokinetic cell electricity is sufficient (SOC is 35% ~ 100%), the second electrical motor drives separately vehicle to travel, and driving engine is shut down, and reduces oil consumption and discharge.When electrokinetic cell electricity is not enough (SOC is 25% ~ 35%), utilize the first electrical motor for power battery charging is to meet vehicle power demand during low speed driving, when running at high speed, driving engine participates in driving with the demand of the driving power and electrical accessory consumed power that meet vehicle, improve the rate of load condensate of driving engine, thus improve the fuel economy of car load; The present invention when electrokinetic cell electricity is not enough, tandem drive vehicle during low speed, parallel drive vehicle during high speed, improves the long-distance performance of high speed; First electrical motor and the second electrical motor Integrated design, compact conformation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Figure 1 shows that the power system of electric automobile structural representation in parallel described in the first embodiment;
Figure 2 shows that the power system of electric automobile structural representation in parallel described in variation of the first embodiment;
Figure 3 shows that the power system of electric automobile structural representation in parallel described in the second embodiment;
Figure 4 shows that the power system of electric automobile structural representation in parallel described in variation of the second embodiment;
In figure:
1, driving engine, 2, gear A, 3, interior axle, 4, gear B, 5, outer shaft, the 6, first motor rotor, the 7, first motor stator, 8, the second motor rotor, the 9, second motor stator, 10, main reduction gear, 11, gear C, 12, axle, 13, power-transfer clutch, 14, gear D, 15, diff, 16, semiaxis, 17, wheel, 18, gear shift sliding hub, 20, bumper.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is explained in detail:
First embodiment
Consult Fig. 1, power system of electric automobile in parallel of the present invention comprises: driving engine 1, gear A 2, interior axle 3, gear B 4, outer shaft 5, first motor rotor 6, first motor stator 7, second motor rotor 8, second motor stator 9, main reduction gear 10, gear C 11, axle 12, power-transfer clutch 13, gear D 14, diff 15, semiaxis 16, wheel 17.
First speed-changing mechanism comprises gear A 2, gear C 11.
Second speed-changing mechanism comprises gear B 4, gear D 14.
The power take-off shaft of the first speed-changing mechanism and the second speed-changing mechanism is an axle, and be axle 12, this axle 12 is also the power input shaft of main reduction gear 10.
First electrical motor comprises the first motor rotor 6, first motor stator 7; Second electrical motor comprises the second motor rotor 8, second motor stator 9.
In this embodiment, described connection switching units is power-transfer clutch 13, and power-transfer clutch 13 is arranged on the axle 12 of the Power output of the first speed-changing mechanism and the second speed-changing mechanism.
Second electrical motor is powered by the electrokinetic cell be not shown in figure, when vehicle is out of service, can be charged to electrokinetic cell by outside electric power network, in vehicle travel process, when electrokinetic cell electricity drops to a certain degree, driving engine 1 drives the first electrical motor to be power battery charging.
Driving engine 1 is connected with the first motor rotor 6 by interior axle 3.Second motor rotor 8 is connected with gear B 4 by outer shaft 5.
Power-transfer clutch 13 in conjunction with time, driving engine 1 is by the first speed-changing mechanism outputting power; Second electrical motor is by the second speed-changing mechanism outputting power.
The power exported from the first speed-changing mechanism and the second speed-changing mechanism is delivered to diff 15 through main reduction gear 10, then is delivered to wheel 17 through semiaxis 16.
Power-transfer clutch 13 combines, and the power of driving engine 1 can be delivered to wheel; Power-transfer clutch 13 is separated, and the transmission of power between driving engine 1 and wheel 17 disconnects.
Configure a bumper 20 at the clutch end of driving engine 1, play bumper and absorbing shock used, cut down the vibrations that driving engine is delivered to the first electrical motor and the second speed-changing mechanism.
The first described electrical motor and described second electrical motor homonymy configuration, and be configured on same axis, the first electrical motor and the second electrical motor can Integrated designs, and structure is compacter.
The second described electrical motor peak power is determined by car load dynamic property, it is not only greater than the demand power that car load hundred kilometers accelerates, and be greater than the demand power of car load maximum speed, concrete watt level by complete vehicle curb weight, hundred kilometers of pick-up times, car load windages, roll the decisions such as resistance.Wherein to be those skilled in the art just confirmable by routine techniques means for the demand power that accelerates of car load hundred kilometers and the demand power of car load maximum speed.
According to power battery charged state, described power system of electric automobile in parallel has two working stages: electric quantity consumption (CD) stage and electricity maintain (CS) stage.When electrokinetic cell electricity abundance (SOC is 35% ~ 100%), described power system of electric automobile in parallel is operated in the CD stage, when electrokinetic cell electricity is reduced to a certain degree (SOC is 25% ~ 35%), described power system of electric automobile in parallel enters into the CS stage.Under the CD stage, described power system of electric automobile in parallel is operated in electric-only mode.Under the CS stage, described power system of electric automobile in parallel has following several mode of operation: low speed series model, high speed traveling power generation mode, the independent drive pattern of high speed engine and high-speed joint drive pattern.Under the CS stage, because driving engine can participate in driving directly, decrease the quadratic loss of energy, so the long-distance better performances of its high speed.
Under CD and the CS stage, described power system of electric automobile mode of operation in parallel is as shown in the table.
Under described power system of electric automobile mode of operation in parallel and each mode of operation, the mode of operation of dynamic assembly is as described below.
Under low speed or high speed electric-only mode, driving engine 1 quits work, and power-transfer clutch 13 is separated, and the second electrical motor drives separately vehicle to travel.
Under low speed series model, driving engine 1 works, and power-transfer clutch 13 is separated, and the first electrical motor generating, the second electrical motor drives separately vehicle to travel.
Under high speed traveling power generation mode, driving engine 1 works, and power-transfer clutch 13 combines, the first electrical motor generating, and the second electrical motor is with turning, and driving engine 1 drives separately vehicle to travel.
Under the independent drive pattern of high speed engine, driving engine 1 works, and power-transfer clutch 13 combines, and the first electrical motor is with turning, and the second electrical motor is with turning, and driving engine 1 drives separately vehicle to travel.
Under high-speed joint drive pattern, driving engine 1 works, and power-transfer clutch 13 combines, and the second electrical motor and driving engine 1 are combined driving vehicle and travelled.
Under different working modes, the mode of operation of each parts of dynamic assembly is as shown in the table.
The variation of the first embodiment
In the above-described first embodiment, consult shown in Fig. 2, power-transfer clutch 13 can also be arranged in the end of axle 12, has and combines and be separated two states, realize function identical with power-transfer clutch 13 in the first embodiment, be used for connect or disconnection driving engine 1 and wheel 17 between transmission of power.
Second embodiment
With in above-mentioned first embodiment uniquely unlike, in this embodiment, described connection switching units is gear shift sliding hub 18, consult shown in Fig. 3, gear shift sliding hub 18 is arranged in the end of axle 12, it is the same with power-transfer clutch 13 in the first embodiment has and combines and be separated two states, and the function realized is identical with power-transfer clutch 13 in the first embodiment, is used for connecting or transmission of power between disconnection driving engine 1 and wheel 17.
The variation of the second embodiment
In above-mentioned second embodiment, consult shown in Fig. 4, gear shift sliding hub 18 can also be arranged on interior axle 3, it is the same with gear shift sliding hub 18 in the second embodiment has and combines and be separated two states, and the function realized is identical with power-transfer clutch 13 in the first embodiment, be used for disconnection or transmission of power between connecting engine 1 and wheel 17.
In addition, the invention is not restricted to the content represented in above-mentioned embodiment, the suitable distortion that can carry out without departing from the scope of the present invention or amendment all belong to the present invention's claimed category example.
Claims (6)
1. a power system of electric automobile in parallel, is characterized in that:
Comprise driving engine (1), the first electrical motor, the second electrical motor, connect switching units, interior axle (3), outer shaft (5), the first speed-changing mechanism, the second speed-changing mechanism and main reduction gear (10);
Described driving engine (1) is connected with the first motor rotor (6) by interior axle (3); Second motor rotor (8) is connected with outer shaft (5);
Described outer shaft (5) is arranged on the periphery of described interior axle (3), and can independently relative to interior axle (3) rotate;
When described connection switching units engages, driving engine (1) is by the first speed-changing mechanism outputting power;
When described connection switching units is separated, driving engine (1) and the second electrical motor work alone separately; Described second electrical motor is by the second speed-changing mechanism outputting power;
Described first speed-changing mechanism and described second speed-changing mechanism all only have a converter speed ratio, through same axis (12) outputting power to main reduction gear (10), then export wheel (17) to through diff (15) and semiaxis (16).
2. one according to claim 1 power system of electric automobile in parallel, is characterized in that:
Described connection switching units is power-transfer clutch (13), and it is arranged on the axle (12) of the first speed-changing mechanism and the second speed-changing mechanism, and described power-transfer clutch (13) is dry type clutch or liquid clutch.
3. one according to claim 1 power system of electric automobile in parallel, is characterized in that:
Described connection switching units is gear shift sliding hub (18), and it is arranged on interior axle (3) or on the axle (12) of the first speed-changing mechanism and the second speed-changing mechanism.
4. one according to claim 1 power system of electric automobile in parallel, is characterized in that:
The first described electrical motor and the second described electrical motor homonymy configuration, and be configured on same axis.
5. one according to claim 1 power system of electric automobile in parallel, is characterized in that:
A bumper (20) is configured at engine power output.
6. one according to claim 1 power system of electric automobile in parallel, is characterized in that:
Second electrical motor peak power is not only greater than car load hundred kilometers and accelerates demand power, and is greater than maximum speed demand power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410129116.5A CN103921687B (en) | 2014-04-01 | 2014-04-01 | A kind of power system of electric automobile in parallel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410129116.5A CN103921687B (en) | 2014-04-01 | 2014-04-01 | A kind of power system of electric automobile in parallel |
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| CN103921687A CN103921687A (en) | 2014-07-16 |
| CN103921687B true CN103921687B (en) | 2016-03-30 |
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| CN105730272B (en) * | 2016-02-04 | 2018-05-25 | 中国第一汽车股份有限公司 | A kind of control method of new energy vehicle low tension management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5389825A (en) * | 1991-04-24 | 1995-02-14 | Aisin Aw Co., Ltd. | System of controlling changeover of an electric power source for an electric motor vehicle |
| JP3097509B2 (en) * | 1995-09-01 | 2000-10-10 | トヨタ自動車株式会社 | Vehicle battery charge control device and charge control method |
| US7222686B2 (en) * | 2004-04-12 | 2007-05-29 | Tm4, Inc. | Drive train for series/parallel hybrid vehicle |
| CN100423963C (en) * | 2006-08-10 | 2008-10-08 | 上海交通大学 | Hybrid drive system in type of multiple series connection stepless speed change |
| CN102765330A (en) * | 2012-07-27 | 2012-11-07 | 东风汽车公司 | Double-generator parallel power supply system for vehicles |
| CN203032381U (en) * | 2012-09-18 | 2013-07-03 | 中国第一汽车股份有限公司 | Range extended electric vehicle (REEV) power system provided with dual clutch transmission device |
| CN204161138U (en) * | 2014-04-01 | 2015-02-18 | 中国第一汽车股份有限公司 | A kind of power system of electric automobile in parallel |
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