CN103612569A - Power source system for electric vehicle - Google Patents
Power source system for electric vehicle Download PDFInfo
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- CN103612569A CN103612569A CN201310226558.7A CN201310226558A CN103612569A CN 103612569 A CN103612569 A CN 103612569A CN 201310226558 A CN201310226558 A CN 201310226558A CN 103612569 A CN103612569 A CN 103612569A
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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
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a power source system for an electric vehicle. The power source system comprises a complete vehicle controller, a power supply and an energy storage power source, the power supply provides power for a drive system, a first charging interface is formed in the power supply and connected with a first ground charging device, the energy storage power source charges the power supply through a DC/DC converter, and meanwhile the energy storage power source achieves the auxiliary function when the braking feedback energy of the drive system is absorbed. A second charging interface connected with a second ground charging device is formed in the energy storage power source, under the control of the complete vehicle controller, the energy storage power source can achieve auxiliary power supply on the drive system, and the capacity of the energy storage power source is smaller than that of the power supply. According to the power source system for the electric vehicle, due to the fact that the energy storage power source is added, on one hand, the power supply can be charged many times in the running process of a multi-cycle vehicle, the output capacity of the power supply is effectively increased, meanwhile, the activity of the power supply can be activated, and the life of the power supply is effectively prolonged; on the other hand, according to the characteristic of the energy storage power source, a large amount of charging capacity can be achieved in a short time, and the power source system is especially suitable for vehicles which stop for a short time at fixed time and fixed positions and carry out multi-cycle operations, such as buses and special vehicles.
Description
Technical field
The present invention relates to electric automobiles, relate in particular to a kind of electric vehicle power-supply system.
Background technology
Electronlmobil refers to take vehicle power as power, with motor, drives and travels, and meets the vehicle of arteries of communication, legislative control on safety requirements.Due to less to the relative orthodox car of environmental concerns, its prospect is extensively had an optimistic view of.
A key factor of restriction battery-driven car widespread use is that electrical source of power energy density is lower at present.Due to the problems such as installation dimension finite sum deadweight of vehicle power, can imitate limited short with travelled distance; Another factor be vehicle power in Vehicle Driving Cycle process only for electric discharge, after electric weight is exhausted, during stagnation of movement, only for charging, and need the process of charging of long period.
Current adopted dual power supply technology is on the basis of main power source, to increase the accessory feed of a super capacitor, shallow benefit for main power source when electric discharge of Vehicle Driving Cycle process, improve main power source service efficiency and life-span, and assist main power source to power to motor when accelerating or climb.Super capacitor auxiliary power system utilizes the advantage that super capacitor power density is large, when vehicle touch at, can high-powerly charge, and makes can fill in its short time, and in the next circulation driving cycle of vehicle, the electric weight being filled with is added in main power source; Meanwhile, when battery-driven car accelerates, can assist main power source power supply with very large discharge power supply, the startup of battery-driven car and acceleration capability are made moderate progress.The buffer action that this dual power supply technology has utilized the short time power electric weight of accessory feed to import, by main power source at touch at the miniwatt in the time mend electricity become stop and driving process in the miniwatt of long period section mend electric, greatly improve the benefit electric weight of main power source, increased the travelled distance of vehicle in working hour.To vehicle main power source electric weight with the inoperative period after single sonorous stone charging, because the electric weight of accessory feed accounts for the certain proportion of main power source, so external charge device reduced with regard to corresponding the charging total amount of main power source, remaining electric weight completes charging by accessory feed.Make to use corresponding shortening of time of external charge device.
Chinese invention patent CN1304217C has disclosed a kind of power supply that supplies power to CD-ROM drive motor, and wherein, main power source is front, and auxiliary power supply is rear, and auxiliary power supply is motor power supply.It is applicable to instantaneous power range larger high-speed electric expreess locomotive, i.e. the manned vehicle of the speed sudden turn of events is used.Because main power source cannot meet high-performance output requirement of moment, therefore utilization is the wide in range feature of power type battery horsepower output of auxiliary power supply.In addition, in the technical scheme that the document discloses, the effect of front power supply is mainly the large energy storage capacity with disposable charging, come for a long time to rear power source charges, it is main power source, the period of service of vehicle power depends on the disposable amount of being filled with, and auxiliary power supply is only regulating power output action, and the continual mileage on whole vehicle power in Vehicle Driving Cycle process is impact not.In addition, the connection of two power supplys in this patented technology scheme only has a kind of mode of series connection, because auxiliary power supply is less than main power source, main power source is less than the output of auxiliary power supply to auxiliary power input, when the storage electric weight of auxiliary power supply is when motor continues to have high-power electric weight demand to use single sonorous stone, the power regulation effect of auxiliary power supply had also just been lost efficacy.
Chinese invention patent CN1187208C discloses a kind of battery-driven car super capacitor auxiliary power system, pass between two power supplys in the technical scheme that the document discloses is to work alone separately, the vehicle start stage (for example, in 20 kilometers/hour of speed per hours), use power-type power supply to work independently; At velocity-stabilization, more than 20 kilometers/hour normally travelling the phase, use main power source power supply, this be the conventional vehicle power of current electric electricity mixed power passenger vehicle, and the problem of two power supplys while coacts during unresolved needs.
Summary of the invention
It is narrower that the technical matters that the present invention mainly solves is to provide a kind of most of the time power demand scope, there is high-power demand of moment the fraction time, and the electric vehicle power-supply system that has repeatedly touch at charge condition in the vehicle around the clock service period, can utilize of short duration charging to obtain larger electric weight, be stored in accessory feed, and in Vehicle Driving Cycle process, electric weight in accessory feed is added to active force power supply, or directly to accessory equipment power supply, or participate in where necessary main power source power supply.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of electric vehicle power-supply system is provided, comprises:
Carload controller, monitors, judges and control the state of main power source and each power device, makes accessory feed and main power source, each power device form various collocation states;
One electrical source of power, mainly to drive system power supply, can also absorb the feedback braking energy of described drive system, assists when needed to vehicle-mounted other auxiliary device power supplies, has the first charging inlet in described electrical source of power, is connected with the first ground charging unit; In the feedback braking energy that absorbs described drive system, play a leading role simultaneously;
One accumulation power supply, mainly charges to described electrical source of power by DC/DC changer, and to other auxiliary device power supplies, the auxiliary feedback braking energy that absorbs described drive system, participates in powering to drive system simultaneously;
Described accumulation power supply is provided with the second charging inlet being connected with the second ground charging unit;
Under the control of described entire car controller, described accumulation power supply can also be realized to described drive system and carry out auxiliary power supply;
The capacity of described accumulation power supply is less than the capacity of described electrical source of power.
Reserve of electricity that the defined electric vehicle power-supply system of above technical scheme can make full use of electrical source of power is large, be suitable for to the feature of slowspeed machine power supply; And accumulation power supply utilization repeatedly, the high-power charging of short time, obtain to greatest extent foreign aid's electric weight, gradation is auxiliary load supplying or charges in discharge process for electrical source of power, to extend the once production time in transit after exogenous charging of main power source, and, utilize repeatedly the activation of brachymedial period to main power source, extend its life-span.In addition, the defined electric vehicle power-supply system of above technical scheme can solve existing two power supplys and merge the problem that works in motor, and the problem of bringing when switching at the different voltage platform power supplys that merge in using.According to long-term exploration, though starting phase or normally travel the phase be to be all main load (motor) power supply with main power source, thereby improve reliability.Accessory feed is preferably auxiliary load (air-conditioning, servo-steering, electric inflation pump, blower fan, low potential source etc.) power supply, remains as main power source charging.In the mode of braking energy feedback, in system of the present invention, it is upper that feedback energy is preferentially added to main power source (energy type) by the acceptable part of main power source, and residue is added on auxiliary power supply (power-type).Main power source obtains the activation of suitable little energy and mends electricity like this, longer service life, and capacity usage ratio is also higher.
In a preferred embodiment of the present invention, the capacity ratio of the capacity of described accumulation power supply and described electrical source of power is 1:2 or 1:3 or 1:4.
In a preferred embodiment of the present invention, described accumulation power supply is super capacitor, accumulation energy type electric capacity or power type battery.
In a preferred embodiment of the present invention, described electrical source of power is energy type battery.
In a preferred embodiment of the present invention, described accumulation power supply is connected with accessory equipment, and to described accessory equipment power supply.
In a preferred embodiment of the present invention, described electric vehicle power-supply system also comprises the first change-over switch, described the first change-over switch is arranged in the supply line of accessory equipment, comprise the second state that accumulation power supply is powered to described accessory equipment to the first state and the electrical source of power of described accessory equipment power supply, when the dump energy of accumulation power supply is not enough to provide accessory equipment to use, described the first change-over switch is switched the second state.
In a preferred embodiment of the present invention, described accessory equipment comprises electric power steering, electric inflation pump, electric air-conditioning and low potential source (containing DC/DC).
In a preferred embodiment of the present invention, between described electrical source of power and described accumulation power supply, be also connected with and prevent reverse battery charge circuit, described in prevent that described electrical source of power is to described accumulation power supply reverse charging.
In a preferred embodiment of the present invention, described accumulation power supply also can participate in to described drive system power supply, quick change-over switch is installed in the supply line of described drive system, when drive system needs moment during high-power kinetic energy, start described quick change-over switch, described quick change-over switch is switched fast between accumulation power supply and electrical source of power, and described accumulation power supply and described electrical source of power are powered to drive system simultaneously.
The invention has the beneficial effects as follows: electric vehicle power-supply system of the present invention, increase an accumulation power supply, can in vehicle traveling process, to electrical source of power, continue charging on the one hand, effectively increase the capacity of electrical source of power, can protect electrical source of power effectively to extend the life-span of electrical source of power simultaneously; The characteristic of accumulation power supply can be charged at short notice in a large number on the other hand, is specially adapted to the vehicle of regularly fixing a point to carry out short time stop as the meeting of bus, sanitation cart and so on.
Accompanying drawing explanation
Fig. 1 is the structural representation of electric vehicle power-supply system one preferred embodiment of the present invention;
Fig. 2 is the structural representation of another preferred embodiment of electric vehicle power-supply system of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to Fig. 1, the embodiment of the present invention comprises:
An electric vehicle power-supply system, comprising: carload controller; Two power supplys of electrical source of power and accumulation power supply.
Described electrical source of power is connected with drive system, accessory equipment, mainly to described drive system power supply; In described electrical source of power, also have the first charging inlet, can be connected with ground charging unit 1; Described electrical source of power is energy type battery, and described energy type battery has larger capacity conventionally, can provide more lasting energy resource supply for consumer.
Described accumulation power supply, by DC/DC changer, to described electrical source of power charging, the simultaneously auxiliary feedback braking energy that absorbs described drive system; On described accumulation power supply, there is the second charging inlet, be connected with ground charging unit 2.Described accumulation power supply is super capacitor or power type battery or Ni-MH battery.Be particularly preferably super capacitor.Described accumulation power supply is by DC/DC changer, is connected with the accessory equipment such as on-board air conditioner, to described accessory equipment, powers.Described the first change-over switch is installed in the supply line of accessory equipment, by described accumulation power supply, to described accessory equipment, powered under normal circumstances, when the dump energy of accumulation power supply is not enough to provide accessory equipment to use, described the first change-over switch switches to the state to described accessory equipment power supply by described electrical source of power.
Described accumulation power supply also can be directly to described drive system power supply, quick change-over switch is installed in the supply line of described drive system, when drive system needs high-power kinetic energy, state such as automobile starting climbing, start described quick change-over switch, described quick change-over switch is switched fast between accumulation power supply and electrical source of power, and described accumulation power supply and described electrical source of power are powered to drive system simultaneously.
Electric vehicle power-supply system of the present invention, the controlled management of all charge and discharge process.The capacity of described accumulation power supply is less than the capacity of described electrical source of power, mainly leans on electrical source of power energy discharge to drive system.Preferably, the capacity ratio of the capacity of described accumulation power supply and described electrical source of power is 1:2,1:3 or 1:4.
Preferably, between described electrical source of power and described accumulation power supply, be also connected with and prevent reverse battery charge circuit, prevent that described electrical source of power is to described accumulation power supply reverse charging.
Described super capacitor mainly contains following advantage: 1) charging rate is fast, charges and can reach the more than 95% of its rated capacity in 10 seconds～10 minutes; (2) service life cycle is long, and degree of depth charge and discharge cycles access times can reach 1 ~ 500,000 time, there is no " memory effect "; (3) energy conversion efficiency is high, and process loss is little, large current energy cycle efficiency >=90%; (4) power density is high, can reach 300W/KG ~ 5000W/KG, is equivalent to 5 ~ 10 times of battery; (5) product raw MAT'L forms, produces, uses, stores and disassembles process all less than polluting, and is desirable environmental protection power supply; (6) discharge and recharge circuit simple, without the such charge circuit of rechargeable battery, safety factor is high, uses for a long time non-maintaining; (7) ultralow temperature characteristic is good, and range of temperatures is wide-40 ℃～+ 70 ℃; (8) easy to detect, dump energy can directly be read; (9) capacity is large, the common 0.1F--1000F of range of capacity.
Refer to Fig. 2, a kind of electric vehicle power-supply system, comprising:
One electrical source of power, can be to drive system and accessory equipment power supply; In described electrical source of power, there is the first charging inlet, be connected with the first ground charging unit;
One accumulation power supply, can charge to described electrical source of power, or to drive system and accessory equipment power supply, absorbs the feedback braking energy of described drive system simultaneously; On described accumulation power supply, there is the second charging inlet being connected with the second ground charging unit;
One high voltage distribution installation, is connected with described electrical source of power, accumulation power supply, accessory equipment and drive system, by the interface of controlling in described high voltage distribution installation, is connected or is disconnected, and controls the work of described electrical source of power and accumulation power supply.
Described accessory equipment comprises high pressure accessory equipment and the low pressure accessory equipment being connected with described high voltage distribution installation respectively.
Described high voltage distribution installation comprises first interface, the second interface, the 3rd interface, the 4th interface, the 5th interface, the 6th interface, the 7th interface and the 8th interface, described first interface is connected with described accumulation power supply by DCDC circuit, described the second interface is connected with described low pressure accessory equipment by DCDC circuit, described the 3rd interface is connected with described high pressure accessory equipment, described the 4th interface is connected with described electrical source of power by protective circuit, described the 5th interface is connected with described electrical source of power, described the 6th interface is connected with described power system, the feedback braking circuit of described the 7th interface and described power system is connected, described the 8th interface is connected with described accumulation power supply.
Described electric vehicle power-supply system is controlled connection and the disconnection of described high voltage distribution installation by controller, thereby realizes multiple mode of operation;
The first mode of operation, described first interface, the second interface, the 3rd interface and the 4th interface are communicated with, described the 5th interface and the 6th interface are communicated with, realize the charging of described accumulation power supply to high pressure accessory equipment and the power supply of low pressure accessory equipment and electrical source of power, described electrical source of power is powered to drive motor;
The second mode of operation, described the 5th interface, the 6th interface, the second interface and the 3rd interface are communicated with, and have realized electrical source of power to high pressure accessory equipment and low pressure accessory equipment and drive motor power supply;
The 3rd mode of operation, described the 6th interface, first interface, the second interface, the 3rd interface and the 5th interface are communicated with, and have realized the parallel connection of accumulation power supply and electrical source of power, and jointly to high pressure accessory equipment and the power supply of low pressure accessory equipment;
The 4th mode of operation, described first interface, described the second interface, described the 3rd interface and described the 6th interface are communicated with, and realize accumulation power supply separately to high pressure accessory equipment and low pressure accessory equipment and drive motor power supply;
The 5th mode of operation, described the 7th interface and the connection of the 4th interface realize feedback braking electrical source of power are charged;
The 6th mode of operation, described the 7th interface and the connection of the 8th interface realize feedback braking accumulation power supply are charged;
The 7th mode of operation, described the 7th interface, the 4th interface and the connection of the 8th interface realize feedback braking accumulation power supply and electrical source of power are charged simultaneously.
Electric vehicle power-supply system of the present invention, mainly utilizes that super capacitor charging rate is fast, service life cycle is long and advantage capacious, and obtains wide-voltage range input and burning voltage is exported by DC/DC changer.Reach the velocity of discharge of controlling super capacitor, realize and fill soon the effect of putting slowly.Be specially adapted to regularly fix a point to carry out the vehicle of short time stop as the meeting of bus and so on, between short time alongside time, the accumulation power supply that super capacitor is formed charges, and charges about 5-10 minute and just can reach the more than 95% of its rated capacity.In vehicle traveling process, described accumulation power supply continues charging to electrical source of power, effectively increases the capacity of electrical source of power, increases the driving range of automobile, can protect electrical source of power simultaneously, effectively extends the life-span of electrical source of power.
In vehicle traveling process, under the management of entire car controller, will be applicable to electrical source of power absorption feedback braking energy and first supply with electrical source of power, dump energy resupplies described accumulation power supply.When the voltage of described accumulation power supply is less than the voltage of electrical source of power, for preventing the reverse charging of electrical source of power to accumulation power supply, can be by preventing that reverse battery charge circuit from realizing.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification sheets of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. an electric vehicle power-supply system, is characterized in that, comprising:
Carload controller, monitors, judges and control the state of main power source and each power device, makes accessory feed and main power source, each power device form various collocation states;
One electrical source of power, mainly to drive system power supply, can also absorb the feedback braking energy of described drive system, assists if desired to vehicle-mounted other auxiliary device power supplies, has the first charging inlet in described electrical source of power, is connected with the first ground charging unit; In the feedback braking energy that absorbs described drive system, play a leading role simultaneously;
One accumulation power supply, is connected with described electrical source of power by DC/DC changer and can charges to described electrical source of power, and to other auxiliary device power supplies, the auxiliary feedback braking energy that absorbs described drive system, participates in powering to drive system simultaneously;
Described accumulation power supply is provided with the second charging inlet being connected with the second ground charging unit;
Under the control of described entire car controller, described accumulation power supply can also be realized to described drive system and carry out auxiliary power supply;
The capacity of described accumulation power supply is less than the capacity of described electrical source of power.
2. electric vehicle power-supply system according to claim 2, is characterized in that, the capacity ratio of the capacity of described accumulation power supply and described electrical source of power is 1:2 or 1:3 or 1:4.
3. according to the arbitrary described electric vehicle power-supply system of claim 1 or 2, it is characterized in that, described accumulation power supply is super capacitor, accumulation energy type electric capacity or power type battery.
4. according to the arbitrary described electric vehicle power-supply system of claim 1 or 2, it is characterized in that, described electrical source of power is energy type battery.
5. according to the arbitrary described electric vehicle power-supply system of claim 1 or 2, it is characterized in that, described accumulation power supply is connected with accessory equipment, and to described accessory equipment power supply.
6. electric vehicle power-supply system according to claim 5, it is characterized in that, described electric vehicle power-supply system also comprises the first change-over switch, described the first change-over switch is arranged in the supply line of accessory equipment, comprise the second state that accumulation power supply is powered to described accessory equipment to the first state and the electrical source of power of described accessory equipment power supply, when the dump energy of accumulation power supply is not enough to provide accessory equipment to use, described the first change-over switch is switched the second state.
7. electric vehicle power-supply system according to claim 6, is characterized in that, described accessory equipment comprises electric power steering, electric inflation pump, air-conditioning and low potential source.
8. according to the arbitrary described electric vehicle power-supply system of claim 1 or 2, it is characterized in that, between described electrical source of power and described accumulation power supply, be also connected with and prevent reverse charging circuit, prevent that described electrical source of power is to described accumulation power supply reverse charging.
9. according to the arbitrary described electric vehicle power-supply system of claim 1 or 2, it is characterized in that, described accumulation power supply also can participate in to described drive system power supply, quick change-over switch is installed in the supply line of described drive system, when drive system needs moment during high-power kinetic energy, start described quick change-over switch, described quick change-over switch is switched fast between accumulation power supply and electrical source of power, and described accumulation power supply and described electrical source of power are powered to drive system simultaneously.
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| CN105952662A (en) * | 2016-06-17 | 2016-09-21 | 广州三业科技有限公司 | Testing device and method for high-power electric pump set |
| CN106004505A (en) * | 2016-07-10 | 2016-10-12 | 安庆新景技电子科技有限公司 | Vehicle power supply system |
| CN112805188A (en) * | 2018-10-16 | 2021-05-14 | 宁波吉利汽车研究开发有限公司 | Power supply system |
| CN112455289A (en) * | 2020-04-27 | 2021-03-09 | 上海蓝诺汽车动力系统有限公司 | Vehicle and multi-energy battery system for vehicle |
| CN114179634A (en) * | 2021-12-16 | 2022-03-15 | 成都壹为新能源汽车有限公司 | Pure electric vehicle expansion energy storage system and electric vehicle with same |
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|---|---|
| CN103612569B (en) | 2016-06-15 |
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