CN109649191A - A kind of electric automobile power battery system - Google Patents

A kind of electric automobile power battery system Download PDF

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Publication number
CN109649191A
CN109649191A CN201910091679.2A CN201910091679A CN109649191A CN 109649191 A CN109649191 A CN 109649191A CN 201910091679 A CN201910091679 A CN 201910091679A CN 109649191 A CN109649191 A CN 109649191A
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CN
China
Prior art keywords
battery
module
parallel
bmu
connection
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.)
Pending
Application number
CN201910091679.2A
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Chinese (zh)
Inventor
丁晓冬
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.)
Harbin motui Technology Co., Ltd
Original Assignee
Harbin Gresseco New Energy Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Harbin Gresseco New Energy Co Ltd filed Critical Harbin Gresseco New Energy Co Ltd
Priority to CN201910091679.2A priority Critical patent/CN109649191A/en
Publication of CN109649191A publication Critical patent/CN109649191A/en
Pending legal-status Critical Current

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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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • B60L2240/545Temperature
    • 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
    • B60L2240/547Voltage
    • 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

Abstract

A kind of electric automobile power battery system, incoming end in parallel including sequential connection, the battery strings module of N group parallel connection, incoming end in parallel, N is greater than 1, the battery strings module, including the BMU control module of CAN bus and the BMU execution unit of sequential connection is arranged, series connection battery core, the BMU execution unit includes connecting again with current sample element after charge control module and control of discharge wired in parallel, the present invention forms electrokinetic cell system battery pack using multi-string battery string wired in parallel, keep battery pack configuration more flexible, it ensure that and be independent of each other between battery strings module and can put into and exit at any time battery pack, it can individually repair if there is problem or directly replace, it will not influence any use, slow down the speed of course continuation mileage decaying, electric car is set to run more secure and reliable, reach easy to maintenance The convenient, purpose of charging modes flexibly and fast, substantially increases vehicle service life, while having good economic benefit and social benefit.

Description

A kind of electric automobile power battery system
Technical field
The present invention relates to technical field of new energy, more specifically, more particularly, to using on electric car A kind of electric automobile power battery system.
Background technique
With the development of new-energy automobile, as clean energy vehicle, the main energy sources of electric car are power batteries, are The high power applications demand for meeting electric car, generallys use the power electric being made of several hundred power batteries in the prior art Cell system powers to electric car, and usually there are two types of modes: first is that being connected by 100 or so high capacity cells, second is that by several It is connected into large-capacity battery pack after hundred small-capacity cells are first in parallel, but is had following defects that i.e. since power battery manufactures work The defect of skill, it is difficult to guarantee in electrokinetic cell system, all batteries all keep high consistency, in use, have Percentage of batteries may be chronically at the electricity of overcharge or over-discharge state in the state for the perhaps over-discharge of overcharging Pond is easy to damage, and then influences the use of entire battery pack, therefore two kinds of connection types of above-mentioned power battery have its fatal Defect, any one monomer goes wrong in link of exactly connecting, and can all influence the course continuation mileage of vehicle, or even can not go Make, once and battery pack has gone out any problem, can only trailer to specialized maintenance factory overhaul, it is time-consuming and laborious, influence Working Life, And the power battery that the prior art both modes form, there are problems that charging for a long time, therefore, in the prior art Considering, using multi-string battery string module, is then composing in parallel power battery pack and be applied on electric car, it is electronic to solve Vehicle operational safety is reliable, convenience easy to maintenance, reduces the problems such as charging time, but due to carrying out go here and there again after battery series connection more When composing in parallel Prospect of EVS Powered with Batteries group, there can be the case where mutual charge and discharge between battery strings, in condition Battery strings can constantly supplement energy to backward battery strings, that is to say, that once occur behindhand battery string, whole group in battery pack The health status of battery declines quickly, and course continuation mileage is caused to be difficult to maintain.
The content of present invention
In view of the above drawbacks of the prior art and problem, technical problem to be solved by the invention is to provide a kind of electronic vapour Vehicle electrokinetic cell system, multiple battery strings are suitble to parallel connection to be used as electrokinetic cell system, provide for electric car effective using dynamic Power battery, convenience safe and reliable to operation, easy to maintenance, charging modes flexibly and fast, make electric car more have dissemination.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of electric automobile power battery system, the incoming end in parallel including sequential connection, the battery strings mould of N group parallel connection Block, incoming end in parallel, N is greater than 1, the battery strings module, BMU control module and sequential connection including CAN bus is arranged BMU execution unit, series connection battery core, the BMU execution unit include after charge control module and control of discharge wired in parallel again with The series connection of current sample element, the BMU control module are separately connected BMU execution unit and series connection battery core, the series connection battery core packet At least two battery cores are included to be connected in series.
It further include the access of N+1 group battery strings wired in parallel in above-mentioned technical proposal.
In above-mentioned technical proposal, the charge control module is made of non-return diode connection charge switch, the electric discharge Control module is made of non-return diode connection discharge switch.
In above-mentioned technical proposal, BMU control unit respectively with the current sample element of BMU execution unit and battery core of connecting Battery core connection, function be single battery voltage sampling, monocell temperature sampling, charging and discharging currents sampling, overvoltage/undervoltage alarm and protect, High/low temperature alarm and parameters calculating, the data such as protection, current-limiting protection, charging and discharging state control, Balance route and protection, SOC are deposited Storage, the intelligent sorting of data, data remote etc..
In above-mentioned technical proposal, the charge switch and discharge switch are D.C. contactor, solid-state relay or oncontacting Point switch.
In above-mentioned technical proposal, the current sample element is one of current divider or Hall sensor.
In the above-mentioned technical solutions, electric automobile power battery system is charged with four kinds of charging modes:
Single group quick charge, while being charged respectively to every group of battery strings module using a charging gun, it can be born with battery Maximum current charging, avoid the limitation due to charging gun capacity and quantity that from cannot accomplishing quick charge;
System quick charge charges to the battery strings module of all accesses in parallel, and electric current is born with all batteries Maximum charging current, for the purpose of quickly filling with;
Trickle charge, the tool to the battery strings modules of all accesses in parallel, when with 0.1 times of total battery capacity or battery trickle charge Body requirement, it is whole to charge to battery;
Selective charge is put into again after the battery strings module recovery exited by failure, and capacity lagging much needs individually The battery strings module of the perhaps new replacement of electric energy supplement needs one group or several groups of the property of can choose of individually supplement electricity individually to fill Electricity.
The present invention can compose in parallel electrokinetic cell system battery pack using multiple groups, replace the mould of existing single string of batteries group Formula, every string series connection battery core can be used in parallel with unlimited capacity, the progress of unlimited type, keeps battery pack configuration more flexible, ensure that Be independent of each other between battery strings module and can put into and exit at any time battery pack, can individually be repaired if there is problem or Directly replace, will not influence any use, slow down course continuation mileage decaying speed, make electric car operation more secure and reliable, Convenience easy to maintenance, charging modes are achieved the purpose that flexibly and fast, have substantially increased vehicle service life, while also having had very well Economic benefit and social benefit.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art To obtain other drawings based on these drawings.
Fig. 1 is the battery strings module composed structure schematic block diagram of invention.
Fig. 2 is the structural representation schematic diagram of the battery strings module of invention.
Fig. 3 is the structural schematic diagram of invention.
Wherein: BMU execution unit 1, series connection battery core 2, incoming end 3 in parallel, current sample element 4, BMU control module 5, electricity Core 6, non-return diode 7, charge switch 8, discharge switch 9, CAN bus 10.
Specific embodiment
Below in conjunction with attached drawing of the invention, technical solution of the present invention is clearly and completely described, it is clear that institute The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair The range of bright protection.
According to Fig. 1 to Fig. 3, as a kind of electric automobile power battery system shown in embodiment, including sequentially connect The incoming end in parallel connect, battery strings module, N+1 group battery strings module and the access of other battery strings wired in parallel of N group parallel connection, Incoming end in parallel, N are greater than 1, embodiment N=5, the battery strings module, including the BMU control module of CAN bus and suitable is arranged Sequence connection BMU execution unit, series connection battery core, the BMU execution unit include charge control module and control of discharge module simultaneously It connects again with current sample element after connection, the BMU control module is separately connected BMU execution unit and series connection battery core, the string Connection battery core includes that at least two battery cores are connected in series.
BMU execution unit includes connecting again with current sample element after charge control module and control of discharge wired in parallel, Charge control module is made of non-return diode connection charge switch, and control of discharge module connects discharge switch by non-return diode Composition.
BMU control unit is connect with the battery core of the current sample element of BMU execution unit and battery core of connecting respectively, series electrical Core includes that at least two battery cores are connected in series, and the CAN bus of BMU control unit setting is the master for completing control and protection movement Unit is wanted, data are uploaded to by whole group communication by CAN bus, BMU control unit function is single battery voltage sampling, monocell Temperature sampling, charging and discharging currents sampling, overvoltage/undervoltage alarm and protection, high/low temperature alarm and protection, current-limiting protection, charging and discharging state The parameters such as control, Balance route and protection, SOC calculate, data storage, the intelligent sorting of data, data remote.
BMU control module controls charge switch, the disconnection of discharge switch and closure by current sample element to realize string Join the charge and discharge of battery core, and charge and discharge process may be implemented individually to control.
The present invention is by charge control module and two charging of control of discharge module composition, electric discharge circuits, charge control module A wiring is connected, i.e. charge switch connects charge relay, then connection charging anode;Control of discharge module connects one and connects Line, i.e. discharge switch connection electric discharge relay, then connect motor anode;It is total negative by series connection battery core, sequential connection hall sensing After device and main negative relay, electrode negative is connected.
Charge switch and discharge switch effect for control charging and discharging state, can by D.C. contactor, solid-state relay or Person's noncontacting switch is realized, is determined depending on specific operating condition and actual requirement;Current sample element is current divider or hall sensing One of device is determined depending on specific operating condition and actual requirement.
The selection of battery core in battery core of connecting can flexible configuration according to actual needs, every string connects battery core type in battery core Must be consistent with capacity, but the battery core capacity in same vehicle in different battery strings modules may be the same or different, battery Type can be identical or uses variety classes battery according to different usage modes.
In actual use, by multiple groups battery strings module, the electric automobile power battery composed in parallel by incoming end in parallel Group, the electric energy of output is for providing the power needed in vehicle traveling process, if wherein the battery core of a certain battery strings module goes out Existing problem, will not influence the normally travel of vehicle;Any selection institute one group of battery strings module in parallel, as Multifunctional battery string mould Block can be used by spare series connection battery core, can and be connected to the unified use of battery pack, be can also be used as a kind of specific function (example As heated or freezing) power supply exclusive use, while absorbing at any time and storing the inputing power generated in running car.
In embodiment in electric automobile power battery system, battery assembly module is formed by 5+1 group battery strings wired in parallel, i.e., 5 groups of battery strings wired in parallel, then one group of reserve battery string module in parallel, every group of battery strings module select 104 3.65V/30Ah Lithium iron phosphate dynamic battery, vehicle power are 56.94kWh+11.388kWh, and vehicle driving mileage can be achieved in disposable charge 400km-450km.If whole group battery pack is added in reserve battery string module, course continuation mileage will increase by 1/5, can also standby with When replacement break down battery strings.
Electric automobile power battery system is charged with four kinds of charging modes:
Single group quick charge, while being charged respectively to every group of battery strings module using a charging gun, it can be born with battery Maximum current charging, avoid the limitation due to charging gun capacity and quantity that from cannot accomplishing quick charge;
System quick charge charges to the battery strings module of all accesses in parallel, and electric current is born with all batteries Maximum charging current, for the purpose of quickly filling with;
Trickle charge, the tool to the battery strings modules of all accesses in parallel, when with 0.1 times of total battery capacity or battery trickle charge Body requirement, it is whole to charge to battery;
Selective charge is put into again after the battery strings module recovery exited by failure, and capacity lagging much needs individually The battery strings module of the perhaps new replacement of electric energy supplement needs one group or several groups of the property of can choose of individually supplement electricity individually to fill Electricity.
In electric car docking process, all battery strings modules are in and shelve state, due to the difference of battery strings module Property, self-discharge rate meeting different from has certain voltage difference if long term stop, in addition ties up between every group of battery strings module It is poor that battery strings module or the battery strings module newly replaced and original battery strings module after repairing also have certain voltage.
Assuming that the voltage of any two groups of battery strings modules is V1 > V2, V1 is the end voltage of battery strings module 1;V2 is battery The end voltage of module 2 is gone here and there, since the charge circuit and discharge loop of two groups of battery strings modules pass through non-return diode and charge and discharge The control of switch is completely independent, so battery strings module 1 will not charge to battery strings module 2 even if V1 > V2, therefore, charging Or two string battery strings modules are also independent of each other when shelving, (battery discharge) battery strings module 1 is preferential when electric car normally travel Release energy power needed for providing traveling for vehicle, and when voltage drops to V1=V2, two groups of battery strings modules release energy simultaneously.
In electric car normal driving process, two groups of battery strings modules provide power simultaneously, if certain in battery strings module 1 Battery core off-capacity, BMU1 control unit issue control instruction and disconnect discharge switch, battery strings module 1 to BMU1 execution unit System is automatically exited from, carries out equilibrium treatment to battery core is fallen behind by BMU1 control unit, after self-regeneration success, closure discharge switch It automatically engaging in system, self-regeneration is unsuccessful, though vehicle power only remains half and remains to continue to drive to maintenance click-through recently The maintenance of row battery strings or the replacement of whole string are repaired and are replaced and is safer, more convenient because battery strings module is independent mutually.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. a kind of electric automobile power battery system, it is characterised in that: the incoming end in parallel including sequential connection, N group parallel connection Battery strings module, incoming end in parallel, N are greater than 1, the battery strings module, including the BMU control module of CAN bus and suitable is arranged Sequence connection BMU execution unit, series connection battery core, the BMU execution unit include charge control module and control of discharge module simultaneously It connects again with current sample element after connection, the BMU control module is separately connected BMU execution unit and series connection battery core, the string Connection battery core includes that at least two battery cores are connected in series.
2. a kind of electric automobile power battery system according to claim 1, it is characterised in that: further include N+1 group battery Wired in parallel of going here and there accesses.
3. a kind of electric automobile power battery system according to claim 1 or claim 2, it is characterised in that: the charge control mould Block is made of non-return diode connection charge switch, and the control of discharge module is made of non-return diode connection discharge switch.
4. a kind of electric automobile power battery system according to claim 3, it is characterised in that: BMU control unit respectively with The current sample element of BMU execution unit is connected with the battery core of series connection battery core.
5. a kind of electric automobile power battery system according to claim 4, it is characterised in that: the current sample element is One of current divider or Hall sensor.
6. a kind of electric automobile power battery system according to claim 5, it is characterised in that: the charge switch and electric discharge Switch is D.C. contactor, solid-state relay or noncontacting switch.
CN201910091679.2A 2019-01-30 2019-01-30 A kind of electric automobile power battery system Pending CN109649191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910091679.2A CN109649191A (en) 2019-01-30 2019-01-30 A kind of electric automobile power battery system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910091679.2A CN109649191A (en) 2019-01-30 2019-01-30 A kind of electric automobile power battery system

Publications (1)

Publication Number Publication Date
CN109649191A true CN109649191A (en) 2019-04-19

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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111509315A (en) * 2020-04-28 2020-08-07 西安新艾电气技术有限公司 Digital battery module management unit and management system thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111509315A (en) * 2020-04-28 2020-08-07 西安新艾电气技术有限公司 Digital battery module management unit and management system thereof

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Effective date of registration: 20190723

Address after: 150000 No. 400 Xuanhua Street, Nangang District, Harbin City, Heilongjiang Province, 6 buildings, 1 unit, 11 floors, 2 rooms

Applicant after: Ding Yuqing

Address before: 150000 Guanghua District, Heping Street, Acheng District, Harbin City, Heilongjiang Province, 4th Floor, 1st Floor, 8th Gate

Applicant before: Harbin Gresseco New Energy Co., Ltd.

Effective date of registration: 20190723

Address after: 150000 No. 400 Xuanhua Street, Nangang District, Harbin City, Heilongjiang Province, 6 buildings, 1 unit, 11 floors, 2 rooms

Applicant after: Ding Yuqing

Address before: 150000 Guanghua District, Heping Street, Acheng District, Harbin City, Heilongjiang Province, 4th Floor, 1st Floor, 8th Gate

Applicant before: Harbin Gresseco New Energy Co., Ltd.

TA01 Transfer of patent application right
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Effective date of registration: 20200110

Address after: 150000 room 113 and 115, floor 1, building 1 (original teaching building), No.111 Songshan Road, Nangang District, Harbin City, Heilongjiang Province

Applicant after: Harbin motui Technology Co., Ltd

Address before: 150000 No. 400 Xuanhua Street, Nangang District, Harbin City, Heilongjiang Province, 6 buildings, 1 unit, 11 floors, 2 rooms

Applicant before: Ding Yuqing

TA01 Transfer of patent application right