CN109649191A - A kind of electric automobile power battery system - Google Patents
A kind of electric automobile power battery system Download PDFInfo
- 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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- 238000007600 charging Methods 0.000 abstract description 23
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 6
- 238000005070 sampling Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000013589 supplement Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/549—Current
-
- 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
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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
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.
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 |
Family
ID=66122399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910091679.2A Withdrawn CN109649191A (en) | 2019-01-30 | 2019-01-30 | A kind of electric automobile power battery system |
Country Status (1)
| Country | Link |
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| CN (1) | CN109649191A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431231A (en) * | 2020-03-31 | 2020-07-17 | 清华大学 | Battery grouping framework based on flexible connection and redundancy |
| 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 |
| CN113715689A (en) * | 2021-09-27 | 2021-11-30 | 哈尔滨莫翠科技有限公司 | Power battery system of electric automobile |
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