CN203543703U - Driving system combined with main and auxiliary motors coupled driving and range extending driving - Google Patents
Driving system combined with main and auxiliary motors coupled driving and range extending driving Download PDFInfo
- Publication number
- CN203543703U CN203543703U CN201320524042.6U CN201320524042U CN203543703U CN 203543703 U CN203543703 U CN 203543703U CN 201320524042 U CN201320524042 U CN 201320524042U CN 203543703 U CN203543703 U CN 203543703U
- Authority
- CN
- China
- Prior art keywords
- motor
- driving
- power
- drive
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
-
- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Disclosed is a driving system combined with main and auxiliary motors coupled driving and range extending driving. The driving system comprises an engine, a clutch, an auxiliary motor, a speed reducer, a main driving motor, a generator set controller and a dual-motor controller, the two motors are used, one motor is used as the main driving motor, the other motor is used as an electric generator of a range extender and also for participating in driving work by being coupled with the main driving motor, (the other motor is named as the auxiliary motor for short as follows), an output shaft at one end of the auxiliary motor is connected with the engine through the clutch, and an output shaft at the other end of the auxiliary motor and an output shaft of the main driving motor are arranged relative to a coaxial line and inserted into a coupler of the speed reducer; when the auxiliary motor participates in driving, the clutch separates the engine from the auxiliary motor, and meanwhile, the coupler in the speed reducer is combined so as to achieve main and auxiliary motors coupled driving; when the motive power requirement of a car is small, the auxiliary motor can be idle or compatibly generate electricity; the above assembly is integrated to form an all-in-one machine, and multiple driving modes such as single motor independent driving during small power, dual-motor coupled driving during large power, combination driving of the engine and the main and auxiliary motors during extra-large load and range extending power-generating driving during insufficient energy capacity of batteries can be achieved under the control of a whole car network.
Description
Technical field
The invention belongs to electric vehicle engineering field, more particularly, relate to a kind of major-minor motor coupling and take into account extended-range drive system.
Background technology
Along with social development, limited oil resources and problem of environmental pollution become and become increasingly conspicuous, this makes electronlmobil more and more cause the attention of countries in the world government and various circles of society, in electronlmobil kind, the advantage such as pure electric automobile is high with its zero-emission, efficiency, convenient driving, operation is comfortable, energy source is extensive has become the final developing direction of future automobile industry.But, battery volume that current pure electric automobile loads is large, heavy, price is high, charging duration is long, continue and make that mileage is short has become the bottleneck of its development, so there is in recent years stroke-increasing electric automobile, its technology path is the length of getting pure electric vehicle, with vehicle-mounted high-energy backup power or generator set, mend the short of its pure electric vehicle, the one, reasonable prestowage reduced battery weight, reduced cost; The 2nd, user can select vehicle according to the radius that travels of frequent use, has expanded pure electronic total kilometrage; The 3rd, when minority long-distance running, there is oil-fired power generating unit that electric energy is provided, expanded the advantages such as continual mileage.In stroke-increasing electric automobile, load the battery-driven car of generator set, because of its continue to use traditional fuel vehicle energy recharge comfort feature, make it have marketable, economic pragmatic feature, be subject to the favor of industry and user's welcome for this reason, become one of mainstream technology direction of current Development of Electric Vehicles.But, increase a set of independently single cylinder generator set, the little meeting of its power is often worked electrical generator and drive motor simultaneously, be difficult to meet vehicle multi-state, high-performance requirement, and noise, vibrations, efficiency, control etc. encounter difficulties, safe reliability is lower, is unfavorable for vehicle drive and travelling comfort; Increase high-power independently generator set, bring difficulty to cost, weight, space, structure, efficiency etc.The technology path of analyzing domestic and international extended-range electric vehicle is all to increase independently power generating system, lower with Integral automobile optimal control conjugation, is difficult to guarantee car load combined efficiency, has limited to extended-range electric vehicle to integrated, intelligent development.For this reason, this case has proposed a kind of major-minor motor coupling and has taken into account extended-range drive system, and this drive system is integrated by suitable height, on the basis of pure electric vehicle, before goes a step further again, and taken into account extended-range drive pattern, improved the complex optimum degree of drive system; Can meet the high-performance needs of multi-state, can meet again the at a high speed needs of long distance travel, improve efficiency, saved the energy, reduced cost, brought convenience, for the development of battery-driven car has proposed a new technology path
Summary of the invention
A kind of major-minor motor coupling that the present invention proposes takes into account extended-range drive system, and native system comprises: driving engine, power-transfer clutch, secondary driving motor, retarder, driver motor, generator set controller, Double Motor Control device.It is characterized in that: adopt two motors, one of them motor is as main drive motor, another electrical motor is except doing the electrical generator of distance increasing unit, participate in driving work with main drive motor coupling, the secondary electrical motor of lower abbreviation, its one end output shaft connects with driving engine by power-transfer clutch, and other end output shaft and main drive motor output shaft are staggered relatively, and coaxial line is inserted in the coupler of retarder; When participating in driving, power-transfer clutch is separated with secondary electrical motor by driving engine, coupler combination in retarder simultaneously, the secondary electrical motor of assistive drive and the power of driver motor are realized and being collected in retarder coupler, realize the driving of major-minor motorcoupling and have improved vehicles dynamic performance; At vehicle, to power, require hour secondary electrical motor can leave unused or go compatible generating, thereby expand the continuous mileage that makes; By the above assembly machine that becomes one, under car load network control, generator set controller, Double Motor Control device can receive work order by network, single motor individual drive while obtaining high speed, when high-power when double-motor couple drive, especially big load driving engine with the combination drive of major-minor motor, when the energy content of battery is not enough the extended-range multiple drive modes such as driving of generating electricity, under intelligent and networked control, guaranteed that the reasonably optimizing of various drive patterns is selected and switches.
Driving engine described in native system has been taked V-arrangement two cylinder water-cooled four cycle engines, has improved power with small-sized Zengcheng device driving engine ratio, also possesses compartment heating condition, and its threshold value is to meet the main drive motor scope of operating at full capacity; Native system power-transfer clutch is to guarantee to switch driving engine and connecting with smooth of secondary electrical motor; The secondary electrical motor of native system be its power of permagnetic synchronous motor can from main drive that electrical motor is identical also can be different, guarantee to participate in smoothly driving, when needs increase Cheng Fa electricity, connects with driving engine, guarantee to generate electricity smoothly under generator set controller control; The retarder of native system is the function that possesses double-motor couple drive, and the relative coaxial line of its major-minor motor output shaft is placed, and is inserted in the coupler of retarder, coupler in conjunction with time realize in the coupler of power in retarder and collect rear drive Vehicle Driving Cycle; The driver motor of native system is permagnetic synchronous motor, and its power threshold is than the little one times of left and right of single motor-driven pure electric vehicle driving motor power.
As mentioned above, because secondary electrical motor participates in driving, make main drive motor reduce power, so can improve motor revolution, by revolution, cover and can expand retarder speed ratio, thereby can take direct driving, deducted gearshift; Because the stack of secondary motor power (output) and driver motor power has guaranteed the tractive performance of vehicle, under increasing journey pattern as while there is large load, still moment participates in driving the tractive performance that keeps excellent to secondary electrical motor; Because main drive motor power reduction makes electrical motor, be operated between high efficient area, motor own loss reduces to have saved the energy; Because power of motor reduces to have reduced motor diameter, facilitated integrated and arranged; Because power of motor reduces to make electrokinetic cell bus current, reduce, reduced line loss, saved the energy and expanded the continuous mileage that makes; Because power of motor reduces, reduced heavy current impact chance and improved battery life.
As mentioned above, single motor individual drive when native system has possessed high speed, when high-power major-minor motorcoupling drive, the extended-range multiple drive modes such as driving of generating electricity while increasing journey machine with double-motor combination drive, the energy content of battery deficiency during especially big load, the various working demand that more adapts to automobile, convenient intelligent control and management, the driveability and the in-use performance that approach and surpass orthodox car, possess advance and practicality; Due to highly integrated and unified consideration loading space and rationally support, native system keeps in repair, reduces costs, increases the benefit, facilitates the aspects such as volume production also all to have the incomparable advance of present battery-driven car in car load design arrangement, manufacture; As mentioned above, the industrialization that this technology path is electronlmobil proposes Liao Yitiaoxin road, and the development of new-energy automobile is had great importance and positive effect.
Accompanying drawing explanation
Fig. 1 is the block diagram that a kind of major-minor motorcoupling of the present invention is taken into account extended-range drive system.
Fig. 2 is the block diagram of driving engine in the present invention.
Fig. 3 is the block diagram of power-transfer clutch in the present invention.
Fig. 4 is the section-drawing of power-transfer clutch in the present invention.
Fig. 5 is the block diagram of secondary electrical motor in the present invention.
Fig. 6 is the block diagram of retarder in the present invention.
Fig. 7 is the section-drawing of retarder in the present invention.
Fig. 8 is the block diagram of main drive motor in the present invention.
Fig. 9 is the whole electric vehicle network control block diagram of association of the present invention.
The specific embodiment
Shown in Fig. 1, be the block diagram that a kind of major-minor motorcoupling of the present invention is taken into account extended-range drive system, in figure, 1 is driving engine, and in figure, 2 is power-transfer clutchs, and in figure, 3 is secondary electrical motors, and in figure, 4 is retarders, and in figure, 5 is main drive motors.
Shown in Fig. 2, be the block diagram of driving engine in the present invention, in figure, 1-1 is the rim of the mouth connecting with power-transfer clutch, and in figure, 1-2 is the tapped bore connecting with power-transfer clutch, and in figure, 1-3 is output spline, and in figure, 1-4 is the supported hole of driving engine, and the weight of whole unit is born in this hole.
Fig. 3 is the block diagram of power-transfer clutch in the present invention, in figure, 2-1 is the low pressure control line of power-transfer clutch, in figure, 2-2 is the installation through hole of power-transfer clutch and engine thread hole 1-2, in figure, 2-3 is the installation rim of the mouth coordinating with driving engine rim of the mouth 1-1, in figure, 2-4 is the installation through hole connecting with compatible electrical motor, and in figure, 2-5 is clutch-bell cover.
It shown in Fig. 4, is the section-drawing of power-transfer clutch in the present invention, in figure, 2-6 is clutch-bell cover, in figure, 2-7 is clutch driven disc, in figure, 2-8 is the output shaft splined hole of power-transfer clutch, and in figure, 2-9 is clutch support bearing, and in figure, 2-10 is power-transfer clutch protecgulum, in figure, 2-11 is power-transfer clutch conducting ring, this conducting ring connects with the low pressure control line 2-1 of power-transfer clutch, and in figure, 2-12 is the input shaft splined hole of power-transfer clutch, and this hole coordinates with driving engine output spline 1-3.
It should be noted that shown in this case power-transfer clutch figure to be magnetic clutch, have dry type and wet type selective, can certainly select the power-transfer clutch of other types, as Hydrautic damping, magnetic rheology type etc., this case needn't be stated more; In addition, the power-transfer clutch of this case diagram is the combination that powers on, and driving engine is combined and is generated electricity with compatible electrical motor, and lower electric separation stops generating.
It shown in Fig. 5, is the block diagram of secondary electrical motor in the present invention, in figure, 3-1 installs the installation through hole of through hole 2-4 with power-transfer clutch, in figure, 3-2 is the mounting hole of compatible electrical motor and retarder, in figure, 3-3 is output spline before compatible electrical motor,, in figure, 3-4 is output line row 3, the dynamic line wherein of compatible electrical motor, control line is a branch of, in figure, 3-5 is castellated shaft after the output of secondary electrical motor, and this axle coordinates with the output shaft splined hole 2-8 of power-transfer clutch.
It shown in Fig. 6, is the block diagram of retarder in the present invention, in figure, 4-1 is and the mounting hole of secondary electrical motor and driver motor, and in figure, 4-2 is input shaft bore position, and in figure, 4-3 is intermediate shaft hole position, in figure, 4-4 is output shaft hole position, and in figure, 4-5 is retarder supported hole; Width between centers this case about retarder axis hole is shown on a line, design attitude as required during actual design.
It shown in Fig. 7, is the section-drawing of retarder in the present invention, in figure, 4-6 is retarder end cap, in figure, 4-7 is rear input shaft, in figure, 4-8 is the splined hole of rear input shaft, this hole connects with output spline 3-3 before secondary electrical motor, in figure, 4-9 is bearing cap shim holding screw, in figure, 4-10 is bearing cap shim, in figure, 4-11 is oil sealing, in figure, 4-12 is retarder side cover holding screw, in figure, 4-13 is reducer shell, in figure, 4-14 is diff backup bearing, in figure, 4-15 is differential assembly, in figure, 4-16 is countershaft-gear assembly, in figure, 4-17 is tween drive shaft end cap, in figure, 4-18 is front input shaft, in figure, 4-19 is front input shaft splined hole, in figure, 4-20 is bearing cover, input shaft, in figure, 4-21 is bearing cover, input shaft screw, in figure, 4-22 is coupler lid holding screw in retarder, in figure, 4-23 is coupler lid in retarder, in figure, 4-24 is the low pressure control line of coupler in retarder, in figure, 4-25 is the driving disc spacing pressing of described coupler, in figure, 4-26 is the clutch plate of described coupler, in figure, 4-27 is the backup bearing of described coupler.
What have to explanation is the coupler in described retarder, and this case is graphic is electromagnetic type coupler, and roughly the same, this case is according to its function name for reality and power-transfer clutch.4-24 is that the low pressure control line of coupler in retarder is when power in the drawings, the driving disc spacing pressing 4-25 of coupler is combined with clutch plate 4-26, now the power of the front output spline 3-3 of secondary electrical motor 3 is convenient to driver motor and is collected, by the diff 4-15 in retarder 4, pass to wheel together, drive running car.Certainly, when secondary electrical motor 3 participates in driving, the low pressure control line 2-1 of power-transfer clutch 2 is power-down state certainly, and this will solve aspect control.Coupler described in this case can be selected the coupler of other types, as Hydrautic damping power-transfer clutch, and silicon oil clutch, magnetic rheological clutch etc., this case only provides principle explanation, during concrete engineering design, should determine according to reality.
It shown in Fig. 8, is the block diagram of main drive motor in the present invention, in figure, 5-1 is the installation with retarder mounting hole 4-1, in figure, 5-2 is the mounting hole of main drive motor, the weight of this hole and the whole unit of motor support hole 1-4 shared, so that should design is reliable, in figure, 5-3 is the housing of main drive motor, in figure, 5-4 is the output line row of main drive motor, wherein there are three power bus and control line, in figure, 5-5 is the output spline of main drive motor, and this castellated shaft coordinates connection with the spline axis hole 4-19 of retarder.
Fig. 9 is the whole electric vehicle network control block diagram of association of the present invention shown in being, generator set controller in figure and major-minor motor drive controller are the contents of this case, this case generator set controller is different from existing engine controller, reason is different as the engine operation environment of distance increasing unit, require constant revolution, voltage and current controlled reset, is stabilized in the efficient district of requirement, for this reason, need generator set directly to control E-gas.Acquisition module in figure is to gather engine state parameters, the module of network-related parameters; Generator group control module in figure is the module of control engine mode of operation, has corresponding warning function simultaneously.Clutch controller in figure is that special control clutch is in conjunction with the controller with separated; At generator set controller, receive after the instruction of entire car controller generating, send start the engine and order in conjunction with power-transfer clutch, clutch controller just powers on to power-transfer clutch in time.
Major-minor motor driving controller in figure is entire car controller subordinate implementation controller, and it comprises main drive motor controller, auxiliary-motor controller and coupler controller; When main drive motor can not meet driving torque demand, auxiliary-motor controller is just given an order and is started coupler controller, to coupler, powers on and guarantees that secondary electrical motor enters work; Here coupler has two states before entering work, and the one, in generating, the 2nd, in armed state, but this two states is all obeyed driving order, drives order preferential.
The detailed control policy that this case is relevant and the explanation of method and controller soft hardware, will carefully state in patent in addition, and this case is discussed no longer in detail.
Although be described with reference to the accompanying drawings the present invention above, those skilled in the art are to be appreciated that above-mentioned explanation is only that the signal of the specific embodiment is set forth, and scope of the present invention is not restricted to above-mentioned specific embodiment.Certainly, the present invention is not limited to and is applied to electric automobiles, also can be applicable to other driving project roughly the same.
Claims (2)
1. a kind of major-minor motor coupling that the present invention proposes takes into account extended-range drive system, native system comprises: driving engine, power-transfer clutch, secondary electrical motor, retarder, the main electrical motor that drives, generator set controller, Double Motor Control device, it is characterized in that: adopt two motors, one of them motor is as main drive motor, another motor is except doing the electrical generator of distance increasing unit, participate in driving work with main drive motor coupling, the secondary electrical motor of lower abbreviation, its one end output shaft connects with driving engine by power-transfer clutch, other end output shaft and main drive motor output shaft are staggered relatively, and coaxial line is inserted in the coupler of retarder, when participating in driving, power-transfer clutch is separated with secondary electrical motor by driving engine, coupler combination in retarder simultaneously, the secondary electrical motor of assistive drive and the power of driver motor are realized and being collected in retarder coupler, realize the driving of major-minor motorcoupling and have improved vehicles dynamic performance, at vehicle, to power, require hour secondary electrical motor can leave unused or go compatible generating, thereby expand the continuous mileage that makes, by the above assembly machine that becomes one, under car load network control, generator set controller, Double Motor Control device can receive work order by network, single motor individual drive while obtaining high speed, when high-power when double-motor couple drive, especially big load driving engine with the combination drive of major-minor motor, when the energy content of battery is not enough the extended-range multiple drive modes such as driving of generating electricity, under intelligent and networked control, guaranteed that the reasonably optimizing of various drive patterns is selected and switches.
2. a kind of major-minor motor coupling according to claim 1 takes into account extended-range drive system, be further characterized in that: motivation has been taked V-arrangement two cylinder water-cooled four cycle engines, the secondary electrical motor of system be its power of permagnetic synchronous motor can from main drive that electrical motor is identical also can be different, guarantee to participate in smoothly driving, when needs increase Cheng Fa electricity, connect with driving engine, guarantee generating smoothly under generator set controller is controlled; The retarder of native system is the function that possesses double-motor couple drive, and the relative coaxial line of its major-minor motor output shaft is placed, and is inserted in the coupler of retarder, coupler in conjunction with time realize in the coupler of power in retarder and collect rear drive Vehicle Driving Cycle; The driver motor of native system is permagnetic synchronous motor, and its power threshold is than the little one times of left and right of single motor-driven pure electric vehicle driving motor power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524042.6U CN203543703U (en) | 2013-08-27 | 2013-08-27 | Driving system combined with main and auxiliary motors coupled driving and range extending driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524042.6U CN203543703U (en) | 2013-08-27 | 2013-08-27 | Driving system combined with main and auxiliary motors coupled driving and range extending driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203543703U true CN203543703U (en) | 2014-04-16 |
Family
ID=50461863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320524042.6U Expired - Fee Related CN203543703U (en) | 2013-08-27 | 2013-08-27 | Driving system combined with main and auxiliary motors coupled driving and range extending driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203543703U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104417379A (en) * | 2013-08-27 | 2015-03-18 | 常州昊康新能源科技有限公司 | Main and auxiliary motor coupling and range-extending driving system |
| US10189552B2 (en) | 2015-09-29 | 2019-01-29 | Niigata Power Systems Co., Ltd. | Ship propulsion method and ship propulsion device |
-
2013
- 2013-08-27 CN CN201320524042.6U patent/CN203543703U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104417379A (en) * | 2013-08-27 | 2015-03-18 | 常州昊康新能源科技有限公司 | Main and auxiliary motor coupling and range-extending driving system |
| US10189552B2 (en) | 2015-09-29 | 2019-01-29 | Niigata Power Systems Co., Ltd. | Ship propulsion method and ship propulsion device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101920652B (en) | Series/parallel double-motor and multi-clutch hybrid drive unit for vehicle | |
| CN100595085C (en) | Plug-in type integrated actuating electric generator hybrid power car driving system | |
| CN102555769B (en) | Serial-parallel combined type double-motor hybrid power drive assembly with multiple operating modes | |
| CN101380887B (en) | Hybrid power car driving system containing driving motor work mode switching device | |
| CN101468646A (en) | Power control system and control method for double-motor hybrid vehicle | |
| CN201941574U (en) | Series-to-parallel hybrid power system based on penetration | |
| KR101580773B1 (en) | Power transmission structure of hybrid car | |
| CN201970847U (en) | Coach driving system with double clutch plug-in hybrid power | |
| CN201863701U (en) | Dual-motor hybrid power system | |
| CN106965795A (en) | Plug-in four-wheel-drive hybrid power vehicle complete vehicle control system | |
| CN201914072U (en) | Plug-in double clutch parallel connection-type hybrid bus | |
| CN202491672U (en) | Hybrid power drive system for four-wheel-driven hybrid vehicle | |
| CN104742716A (en) | Hybrid power system with double-rotor motor and implementation method thereof | |
| CN202200825U (en) | Plug-in hybrid passenger car driving system | |
| CN104742717A (en) | Hybrid electric system adopting double-rotor motor and implementation method of hybrid electric system adopting double-rotor motor | |
| CN203543703U (en) | Driving system combined with main and auxiliary motors coupled driving and range extending driving | |
| CN103921665B (en) | A kind of range extended electric vehicle power system | |
| CN106394230B (en) | A kind of oil is electric to mix multi-mode automobile driving system and control method | |
| CN101973268A (en) | Energy coupling control method of plug-in electric vehicle in series | |
| CN103552480A (en) | Completely power-driven dedicated school bus adopting dual charging modes | |
| CN201931986U (en) | Hybrid type mixed power driving system | |
| CN201587316U (en) | Power-driven device of hybrid electric vehicle | |
| CN2761454Y (en) | Mild mixing single shaft parallel mixed power assembly | |
| CN109677395A (en) | A kind of hybrid power system of extended-range mixed power electric car | |
| CN203511338U (en) | Special pure electric school bus adopting double-battery-pack mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20150827 |
|
| EXPY | Termination of patent right or utility model |