CN105946585A - Vehicle power source managing system and electric vehicle - Google Patents

Vehicle power source managing system and electric vehicle Download PDF

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Publication number
CN105946585A
CN105946585A CN201610388742.5A CN201610388742A CN105946585A CN 105946585 A CN105946585 A CN 105946585A CN 201610388742 A CN201610388742 A CN 201610388742A CN 105946585 A CN105946585 A CN 105946585A
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CN
China
Prior art keywords
management system
power management
vehicular power
controller
vehicle
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Granted
Application number
CN201610388742.5A
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Chinese (zh)
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CN105946585B (en
Inventor
胡壮丰
彦斯·贝肯
丁力·罗伯特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qoros Automotive Co Ltd
Ooros Automotive Co Ltd
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Ooros Automotive Co Ltd
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Priority to CN201610388742.5A priority Critical patent/CN105946585B/en
Publication of CN105946585A publication Critical patent/CN105946585A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L7/00Electrodynamic brake systems for vehicles in general
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/42Drive Train control parameters related to electric machines
    • B60L2240/429Current
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • B60L2240/549Current
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a vehicle power source managing system and an electric vehicle with the same. The vehicle power source managing system is connected with a vehicle control system and comprises an energy storage unit, a current control level connected with the energy storage unit and a controller connected with the energy storage unit and the current control level. The controller comprises a battery managing system and a communication interface connected with the vehicle control system. The vehicle power source managing system is further provided with a change-over switch connected with the current control level in parallel, and the change-over switch is connected with the controller. The vehicle power source managing system guarantees normal operation of a battery under the instant high current output condition, and overcurrent protection is achieved.

Description

A kind of Vehicular power management system and electric vehicle
Technical field
The application relates to electric vehicle field, is specifically related to Vehicular power management system and the peace of electric vehicle Fill the electric vehicle of this system.
Background technology
In prior art, in electric vehicle field, lithium ion battery is gradually used to replace traditional plumbic acid Battery, to make energy-storage system (or claiming " accumulator ").Normally, Vehicular power management system Rated operational voltage has 6V, 12V, 24V etc..Relative to lead-acid battery, lithium ion battery is to physical rings The situation of border and electric load state is more sensitive.Such as, at low ambient temperatures, the merit of lithium ion battery Rate input and fan-out capability can be limited to its internal resistance increased.And in this case, too high electric current Critical voltage then can be caused to exceed or fall below normal value, and then produce after damage battery even damages battery Really.
This can produce carrying current beyond rated voltage or less than the limiting voltage of rated voltage.Generally This situation can maintain several seconds, such as: for start internal combustion engine power is provided time.Specifically, if Vehicle running voltage in low-voltage power system is 12V, and vehicle motor can reach with the upper limit of output voltage To 15V, and high-power application may reduce output voltage to 9V or lower.When beyond this electricity During pressure scope, it is necessary to assure battery functi on normal and also by power protection.
Therefore, it is applied to traditional vehicle when above trigger based on lithium-ion technology or booster battery Time in (such as: automobile, truck, bus and motorcycle etc.), it may occur that specified beyond it The phenomenon of voltage range.Such as, battery based on LiFePO4 technology, its running voltage generally exists Between 3.7V-2V, but instantaneous voltage minimum reaches 1.6V.Battery based on LiMnOx technology, its work Make voltage generally between 4.2V-2.5V, but instantaneous voltage minimum reaches 2V.
If battery is directly connected on the expanded metals of 12V voltage of vehicle, the input and output electric current of battery With battery internal resistance, charged state (SOC:State Of Charge), expanded metals (Board Net) Voltage levvl becomes certain functional relationship.If there is no current control device between battery and vehicle expanded metals, just Have the huge current flow along with voltage fuctuation within a narrow range and flow out battery, flow in the expanded metals of vehicle 12V voltage.
Therefore, prior art is typically necessary current control device is set.Usual this electric current controls dress Putting is a kind of power versus pulse modulating equipment.Under big current conditions if above citing, this constant power- Pulse modulation devices is accomplished by being designed to withstand as starting the high-current pulse needed for electromotor, and this The cost that sample does is much more expensive.
Summary of the invention
In view of this, the application provide a kind of Vehicular power management system with function of power protection and The electric vehicle of this system is installed.
The application realizes one of by following technical solution goal of the invention: a kind of Vehicular power management system, Be connected with vehicle control system, the current control level that is connected with energy-storage units including energy-storage units and with The controller that energy-storage units and current control level connect.Described energy-storage units includes some lithium ion batteries. Described controller includes battery management system and the communication interface being connected with vehicle control system;Described system Uniting permutator also in parallel with current control level, described permutator is connected with controller.
Further, described current control level is quasiconductor current control level.
Further, described permutator is electric mechanical switch.
Further, described controller is configured to detect the state of energy-storage units, and described state is extremely Include one or more in battery charging state, temperature and voltage less.
Further, described controller is configured to detect electric current.
Further, according to the status values of the energy-storage units detected, described controller controls electric current Controlled stage works, so that the electric current of input in charging process and the electric current holding of output in discharge process Within safety range.
Further, described current control level has discharge and recharge bidirectional operation mode.
Further, described vehicle control system to controller send feedback on-position information time, institute Stating current control level and be controlled as charge mode, battery just can be charged to peak;Vehicle expanded metals Voltage drops to low-level state, and described current control level is controlled as mode of operation of discharging, and energy-storage units is put Electricity.
Further, described energy-storage units, current control level, controller, permutator are assembled into electricity In the housing in pond.
The application by following technical solution two realize goal of the invention: a kind of electric vehicle, including car Control system and Vehicular power management system as above.
Compared with prior art, the application Vehicular power management system ensure that battery is defeated at high instantaneous current In the case of going out properly functioning, it is achieved overcurrent protection.Closer, the application Vehicular power management System can also realize overcharge protection, over-discharge protection and solve thermal limit problem.
Accompanying drawing explanation
Fig. 1 is the structural representation of Vehicular power management system of the present invention.
Detailed description of the invention
Here will illustrate illustrative embodiments in detail, its example represents in the accompanying drawings.Following When description relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous and wants Element.Embodiment described in following exemplary embodiment does not represent own consistent with the application Embodiment.On the contrary, they only with as appended claims describes in detail, some sides of the application The example of the apparatus and method that face is consistent.
It is only merely for describing the purpose of particular implementation at term used in this application, and is not intended to be limiting The application." a kind of ", " described " of singulative used in the application and appended claims " it is somebody's turn to do " be also intended to include most form, unless context clearly shows that other implications.It is also understood that Term "and/or" used herein refer to and comprise any of one or more project of listing being associated or Likely combine.
As it is shown in figure 1, the application Vehicular power management system, it is connected with vehicle control system 5, including Energy-storage units 1, current control level 2 and the controller 3 being connected with energy-storage units 1 and current control level 2. Described energy-storage units 1 includes some lithium ion batteries (not shown).Described current control level 2 is partly to lead Body current control level, in order to manage power, heating, charged state and voltage etc., to prevent super-high-current The situations such as output or input battery occur.Described controller 3 includes battery management system (BMS:Battery Management System) and the communication interface that is connected with vehicle control system 5.
Described controller 3 detects the state of energy-storage units 4, including charged state, cell temperature, unit Voltage etc..Further, described controller 3 also detects the numerical value of electric current.Can distinguish according to above numerical value Calculate battery and allow input or output and voltage.These values in order to drive current control level 1 to work, So that in charging process input electric current and discharge process in output electric current be maintained at safety range Within, protect battery and whole system.
In order in accordance with cost efficiency principle, electric current and the production of power in described quasiconductor current control level 2 Measure electric current when being limited to normal vehicle operation or the reasonable lower limit of power.
In order to ensure battery high instantaneous current export in the case of properly functioning, it is achieved overcurrent protection, The application Vehicular power management system also includes the permutator 4 in parallel with current control level 1.
This permutator 4 is the same with the high rheotrope of general starter, can be assembled into and send out In motivation relay or other equipment.In one embodiment, described permutator is electric mechanical switch.
If vehicle control system 5 needs energy-storage units 1 output HIGH current (such as engine start), Controller 3 starts this permutator 4, it is allowed to high-current flow goes out battery.Owing to controller 3 can make energy storage Unit 1 keeps full power state, controls parallel current control level 2 and permutator 4 simultaneously, and this is not only Make battery can export or input high electric current and the protection to energy-storage units 1 can be realized.Controller 3 can at any time be operated individually or simultaneously current control level 2 and permutator 4.
Further, described current control level 1 has discharge and recharge bidirectional operation mode, and therefore electric current controls Level 2 can the most effectively control the charged state of energy-storage units 1.Further, the application proposes A kind of scheme of regenerative braking under low-pressure state (or claiming regenerative braking, Regenerative Braking), I.e. under low-level charged state, if vehicle control system 5 sends feedback on-position to controller 3 Information command time, described current control level 1 is controlled as charge mode, and battery just can be electrically charged To peak.Correspondingly, it is also possible to carry out reverse operating, if the 12V expanded metals voltage of vehicle drops to low Level, described current control level 1 is controlled as mode of operation of discharging, thus can control battery Energy-storage units 1 discharges.
In one embodiment, described energy-storage units 1, current control level 2, controller 3, permutator 4 assemblies such as grade can be assembled in the housing of battery.
The theme of the application and core are exactly to propose a kind of vehicle of based on low pressure relevant with lithium ion battery Power-supply management system, can complete the overcurrent protection for system self, overcharge protection, excess Discharge prevention and solve thermal limit problem, additionally proposes and a kind of meets very much Cost Benefit Principle Method provides high electric current for electric motor starting.
In superincumbent description, elaborate the details of technical scheme, but, people in the art Member will appreciate that, the invention is not restricted to the detail listed by above-described embodiment, but can be in right Require change in limited range.
The foregoing is only the better embodiment of the application, not in order to limit the application, all at this Within the spirit of application and principle, any modification, equivalent substitution and improvement etc. done, should be included in this Within the scope of application protection.

Claims (10)

1. a Vehicular power management system, is connected with vehicle control system, it is characterised in that: include storage Can the unit current control level that is connected with energy-storage units and being connected with energy-storage units and current control level Controller;Described energy-storage units includes some lithium ion batteries;Described controller includes battery management system And the communication interface being connected with vehicle control system;The conversion that described system is also in parallel with current control level Switch, described permutator is connected with controller.
2. Vehicular power management system as claimed in claim 1, it is characterised in that: described electric current controls Level is quasiconductor current control level.
3. Vehicular power management system as claimed in claim 1, it is characterised in that: described permutator For electric mechanical switch.
4. Vehicular power management system as claimed in claim 1, it is characterised in that: described controller quilt Be configured for detecting the state of energy-storage units, described state at least include battery charging state, temperature with And one or more in voltage.
5. Vehicular power management system as claimed in claim 4, it is characterised in that: described controller quilt It is configured for detecting electric current.
6. the Vehicular power management system as described in claim 4 or 5, it is characterised in that: according to detection The status values of the energy-storage units arrived, described controller controls current control level work, so that charging Within in the electric current inputted in journey and discharge process, the electric current of output is maintained at safety range.
7. Vehicular power management system as claimed in claim 1, it is characterised in that: described electric current controls Level has discharge and recharge bidirectional operation mode.
8. Vehicular power management system as claimed in claim 7, it is characterised in that: described wagon control System is when controller sends feedback on-position information, and described current control level is controlled as work of charging Pattern, battery just can be charged to peak;Vehicle expanded metals voltage drop to low-level state, described electric current Controlled stage is controlled as mode of operation of discharging, and energy-storage units discharges.
9. Vehicular power management system as claimed in claim 1, it is characterised in that: described energy-storage units, Current control level, controller, permutator are assembled in the housing of battery.
10. an electric vehicle, it is characterised in that: include vehicle control system and such as claim 1 To the Vehicular power management system described in 9 any one.
CN201610388742.5A 2016-06-02 2016-06-02 A kind of Vehicular power management system and electric vehicle Active CN105946585B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107117048A (en) * 2017-04-14 2017-09-01 铭创(福建)电子科技有限公司 The long-distance management device and method of a kind of new energy vehicle electrokinetic cell

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101842959A (en) * 2007-11-01 2010-09-22 通用电气公司 System and method for battery control of hybrid locomotrives
CN101958563A (en) * 2009-07-14 2011-01-26 通用汽车环球科技运作公司 The controlling schemes of the balanced electric charge of HV storage battery
CN102832657A (en) * 2011-06-16 2012-12-19 凹凸电子(武汉)有限公司 Battery management system and method
US20150142189A1 (en) * 2013-11-15 2015-05-21 Institute For Information Industry Power generation control system, method and non-transitory computer readable storage medium of the same
KR101587358B1 (en) * 2014-09-02 2016-02-02 엘에스산전 주식회사 A hybrid vehicle
CN105552980A (en) * 2014-10-22 2016-05-04 福特全球技术公司 Method for controlling a voltage source for charging a battery of a motor vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101842959A (en) * 2007-11-01 2010-09-22 通用电气公司 System and method for battery control of hybrid locomotrives
CN101958563A (en) * 2009-07-14 2011-01-26 通用汽车环球科技运作公司 The controlling schemes of the balanced electric charge of HV storage battery
CN102832657A (en) * 2011-06-16 2012-12-19 凹凸电子(武汉)有限公司 Battery management system and method
US20150142189A1 (en) * 2013-11-15 2015-05-21 Institute For Information Industry Power generation control system, method and non-transitory computer readable storage medium of the same
KR101587358B1 (en) * 2014-09-02 2016-02-02 엘에스산전 주식회사 A hybrid vehicle
CN105552980A (en) * 2014-10-22 2016-05-04 福特全球技术公司 Method for controlling a voltage source for charging a battery of a motor vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107117048A (en) * 2017-04-14 2017-09-01 铭创(福建)电子科技有限公司 The long-distance management device and method of a kind of new energy vehicle electrokinetic cell
CN107117048B (en) * 2017-04-14 2019-06-07 铭创(福建)电子科技有限公司 A kind of long-distance management device and method of new energy vehicle power battery

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