CN107539159B - Double source battery pack, management method and system and electric vehicle - Google Patents
Double source battery pack, management method and system and electric vehicle Download PDFInfo
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- CN107539159B CN107539159B CN201710841992.4A CN201710841992A CN107539159B CN 107539159 B CN107539159 B CN 107539159B CN 201710841992 A CN201710841992 A CN 201710841992A CN 107539159 B CN107539159 B CN 107539159B
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- 238000007726 management method Methods 0.000 title abstract description 17
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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
- 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
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The present invention provides a kind of double source battery pack, management method and system and electric vehicle, double source battery pack include：Including main battery packet and control unit and the main battery packet storehouse be fixed in electric vehicle；With including auxiliary battery pack and be removably mounted on the auxiliary battery pack storehouse in electric vehicle；DC/DC converter first end and second ends are connected to total anode of auxiliary battery pack and total negative terminal, and third end is connected with total anode of main battery packet and total positive output end；4th end is connect with total negative terminal of main battery packet and total negative output terminal, forms the charge and discharge path of main battery packet and auxiliary battery pack；Control unit is by controlling DC/DC converters to realize the charge and discharge control to auxiliary battery pack；Main battery packet is different with the battery core standard of auxiliary battery pack.The present invention reduces the performance requirement of auxiliary battery pack while the vehicle dynamic property and economy for ensureing electric vehicle so that double source battery pack saves 10% 30% cost compared with primary battery group.
Description
Technical field
The present invention relates to the power battery field of electric vehicle, more particularly to a kind of double source battery for having and increasing Cheng Gongneng
Packet, management method and system and electric vehicle.
Background technology
Global evolution is swift and violent at present by pure electric automobile EV (Electric Vehicle), by the shadow of orthodox car driving habit
It rings, the requirement to the long continual mileage of electric vehicle EV is increasingly becoming main trend, such as tesla Model-S long continual mileage versions
Most high-purity electric nearly 500 kilometers of mileage travelled, masses also declare the following electric vehicle EV released more than 400km.
In order to meet long continual mileage requirement, the electrokinetic cell system (Battery Pack) of electric vehicle configuration needs more
Large capacity, generally more than 50kWh.Battery system cost, battery pack take up space all in vehicle installation to the system of electric vehicle
It makes and proposes sizable challenge.
At present, electric vehicle generally solves the requirement of big Electronic power batteries packet using two ways：
First, increase the capacity of single battery core, as Samsung releases 96Ah ternary lithium ion batteries.Although increase monomer electricity
The capacity of core, but the increase of its capacity will certainly bring the increase of space occupancy rate, so can also restrict vehicle battery significantly
The utilization rate in space, also, when designing battery pack, the single battery core of large capacity is not easy to be optionally combined, this causes battery pack
Expansibility be deteriorated, different continual mileage demands can not be adapted to.
Second, the single battery core using a large amount of low capacity：Such as the battery pack scheme of tesla, based on low capacity electricity
Core 18650, using up to ten thousand, the low capacity battery core is combined, and the requirement of big Electronic power batteries packet is solved with this.Up to ten thousand lists
Body battery core is optionally combined, certainly will using a large amount of single battery core although solving the problems, such as large capacity and convenient for combination
Cause the reduction of the overall security and reliability of battery pack.
Also, whether using any of both the above scheme, in order to ensure the service life of vehicle, for single battery core
The requirement of reliability is high, and the cost for so also resulting in the integral battery door packet of electric vehicle is difficult to control.
And in the integral vehicle cost of electric vehicle EV, the cost of power battery packet system accounts for 40-70%.By current battery
Battery core calculation of price, the 50% of the integral vehicle cost that power battery pack cost mostly can be more than electric vehicle EV.With based on fuel oil
Orthodox car is compared, and electric vehicle EV has no cost advantage, so as to constrain the market acceptance of electric vehicle EV significantly.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of double source battery pack, managers
Method and system and electric vehicle, for solving the problems, such as that the battery pack cost of electric vehicle in the prior art is excessively high.
In order to achieve the above objects and other related objects, the present invention provides a kind of double source battery pack, applied to electric vehicle,
The double source battery pack includes：Main battery packet storehouse and auxiliary battery pack storehouse；The main battery packet storehouse is fixed in the electric vehicle,
Including main battery packet and control unit；The auxiliary battery pack storehouse is removably mounted on the electronic vapour by mechanical quick change construction
Car, including auxiliary battery pack；Auxiliary battery pack storehouse is connected described in the main battery Bao Cangyu；The double source battery pack further includes
DC/DC converters, first end and second end are connected to total anode of the auxiliary battery pack and total negative terminal, third end difference
Be connected with total anode of the main battery packet and total positive output end of the double source battery pack, the 4th end respectively with the main battery
Total negative terminal of packet is connected with total negative output terminal of the double source battery pack；So as to form the main battery packet and the auxiliary battery pack
Charge and discharge path；And the DC/DC converters are located at the main battery packet storehouse or the auxiliary battery pack storehouse；Described control unit
It is connected respectively with the DC/DC converters, the main battery packet and the auxiliary battery pack, described control unit passes through described in control
The working condition of DC/DC converters realizes the charge and discharge control to the auxiliary battery pack；The main battery packet and the auxiliary battery
The battery core standard of packet is different.
In one embodiment of the invention, the battery core standard includes：Shape form, material, rated voltage, capacity, life
Produce the time.
In one embodiment of the invention, the auxiliary battery pack storehouse including the auxiliary battery pack is according in practical driving
Journey demand carries out selection installation.
In one embodiment of the invention, described control unit controls institute according to the power demand needed for the electric vehicle
It states DC/DC converters and passes through control of the boost or depressurization realization to the discharge power of the auxiliary battery pack；In the auxiliary battery pack
During charging, charging termination condition of the described control unit according to the auxiliary battery pack controls the DC/DC converters to pass through boosting
Or it is depressured to realize the charging to the auxiliary battery pack.
In one embodiment of the invention, when the end of charge voltage of the auxiliary battery pack is less than putting for the main battery packet
In the case of electric blanking voltage：In the auxiliary battery pack electric discharge, described control unit controls the DC/DC converters to pass through liter
Pressure realizes the control to the discharge power of the auxiliary battery pack, to meet the discharge power needed for the electric vehicle；Described
During auxiliary battery pack charging, described control unit controls the DC/DC converters to be realized by being depressured to the auxiliary battery pack
Charging.
In one embodiment of the invention, described control unit is to be dependent on remaining capacity and the source of the main battery packet
The working condition of the DC/DC converters is controlled in the power demand of the electric vehicle.
In one embodiment of the invention, when the remaining capacity of the main battery packet is less than the first power threshold, then institute
Stating control unit controls the DC/DC converters to start to work, and the auxiliary battery pack takes over the main battery and unwraps beginning electric discharge, and
It charges simultaneously for the main battery packet；It is when the remaining capacity of the main battery packet is more than the second power threshold, then described
Control unit controls the DC/DC converters to be stopped, and the main battery unwraps beginning electric discharge；First power threshold is less than
Second power threshold.
In one embodiment of the invention, discharge condition is in, and after the DC/DC converters in the auxiliary battery pack
When the discharge power of output can not meet the power demand of the electric vehicle, then described control unit is by controlling the DC/
DC converters are discharged with the rated power of the auxiliary battery pack, and are controlled the main battery packet while discharged and supplemented.
In one embodiment of the invention, when the DC/DC converters are located at the main battery packet storehouse, the double source electricity
Chi Bao further includes the second switch unit in the auxiliary battery pack storehouse；The second switch unit is connected to the auxiliary battery
Between total anode of packet and the first end of the DC/DC converters, for controlling the charge and discharge of the auxiliary battery pack.
In one embodiment of the invention, the third that the double source battery pack is further included in the auxiliary battery pack storehouse is opened
Close unit；The third switch unit be connected to total negative terminal of the auxiliary battery pack and the DC/DC converters second end it
Between, for controlling the charge and discharge of the auxiliary battery pack.
In one embodiment of the invention, the main battery packet storehouse further include first switch unit, common switch unit and
First storage unit；The auxiliary battery pack storehouse further includes the second storage unit；The charge and discharge path includes being exclusively used in the master
The main path and the confession main battery packet and the common path of the common charge and discharge of auxiliary battery pack of battery pack charge and discharge；Described
One switch unit is set on the main path, for controlling the charge and discharge of the main battery packet；The common switch unit is set
It is placed on the common path, for controlling the charge and discharge of the main battery packet and the auxiliary battery pack；First storage is single
It is first to be connected with the main battery packet and described control unit, for preserving the related data of the main battery packet；Described second deposits
Storage unit is connected with the auxiliary battery pack and described control unit, for preserving the related data of the auxiliary battery pack.
The invention also discloses a kind of electric vehicle, the electric vehicle uses double source battery pack as described above.
The invention also discloses a kind of management method of double source battery pack, applied to the entire car controller of electric vehicle, and
The auxiliary battery pack storehouse of the double source battery pack is removably mounted on by mechanical quick change construction in the electric vehicle；It is described double
The management method of source battery packet includes：Step S31 receives the continual mileage demand of driver；Step S32 judges the driving
Mileage requirement：When the continual mileage demand is less than preset first mileage threshold value, do not prompt that the auxiliary battery pack storehouse is installed,
And jump to step S34；When the continual mileage demand is more than the first mileage threshold value, then prompt that the auxiliary battery is installed
Bao Cang；Step S33 detects whether the auxiliary battery pack storehouse installs well using the control unit of the double source battery pack：If so,
Then jump to step S34；If it is not, then prompt early warning；Step S34 adjusts the power output of the double source battery pack.
In one embodiment of the invention, the step S32 is further included：Whether big continue to judge the continual mileage demand
In preset second mileage threshold value, if so, then prompting the auxiliary battery pack storehouse of the installation with high electricity, then the step is jumped to
Rapid S33；If it is not, then prompting the auxiliary battery pack storehouse of the installation with low battery, then jump to step S33.
The invention also discloses a kind of management system of double source battery pack, applied to the entire car controller of electric vehicle, and
The auxiliary battery pack storehouse of the double source battery pack is removably mounted on by mechanical quick change construction in the electric vehicle；It is described double
Source battery is assured reason system and is included：Receiving module, for receiving the continual mileage demand that driver is provided；Judge control mould
Block, for continual mileage demand to be judged and controlled according to preset first mileage threshold value and the second mileage threshold value；Detection
Module, for detecting whether the auxiliary battery pack storehouse installs well using the control unit of the double source battery pack；Prompt early warning
Module, for the testing result according to the judge control result and/or the detection module for judging control module, to driving
Person makes prompting or early warning；Module is adjusted, for adjusting the power output of the double source battery pack；Memory module, for preserving
The first mileage threshold value and the second mileage threshold value.
As described above, a kind of double source battery pack and electric vehicle of the present invention, have following advantageous effects：
1) present invention uses the battery pack of different battery core standards respectively as main battery packet and auxiliary battery pack, and passes through DC/
DC converters control the charge and discharge of auxiliary battery pack, ensure that the discharge-rate of auxiliary battery pack is remained in certain range,
It and can constant output；And it during if there is discharge power deficiency, is then supplemented by main battery packet, this measure effectively compensates for high energy
The defects of than between battery core multiplying power discharging and service life；
2) by the present invention in that power battery (main battery packet and auxiliary battery pack) with different battery core standards so that double source electricity
Chi Bao saves the cost of 10%-30% compared with primary battery group；
3) present invention can also ensure that dynamic property, the economy of the vehicle of electric vehicle are not influenced by battery and reduced；
4) invention enhances the safety redundancies of electric vehicle, even if a battery pack breaks down, driver also can
Vehicle is reached into destination or 4S repairs；Under the premise of meeting the needs of driver's trip, mileage anxiety is eliminated, and can be with
The holistic cost of electrokinetic cell system is reduced, enhances vehicle competitiveness；
5) since auxiliary battery pack storehouse is removably, so the present invention can be according to the continual mileage demand of driver to double source
Battery pack is managed, and for different continual mileage demands, prompts the auxiliary battery of auxiliary battery pack of the installation with different electricity
Bao Cang so that the main battery packet storehouse of double source battery pack can carry out flexible combination with different auxiliary battery pack storehouses, to meet difference
Continual mileage, adaptively meet the continual mileage demand of driver.
Description of the drawings
Fig. 1 is shown as a kind of theory structure schematic diagram of double source battery pack disclosed by the embodiments of the present invention.
Fig. 2 is shown as the structure diagram of the double source battery pack disclosed by the embodiments of the present invention using hard switching.
Fig. 3 is shown as a kind of theory structure schematic diagram of double source battery pack disclosed in second embodiment of the invention.
Fig. 4 is shown as a kind of theory structure schematic diagram of double source battery pack disclosed in third embodiment of the invention.
Fig. 5 is shown as the theory structure schematic diagram of another double source battery pack disclosed in third embodiment of the invention.
Fig. 6 is shown as a kind of flow diagram of the management method of double source battery pack disclosed by the embodiments of the present invention.
Fig. 7 is shown as a kind of theory structure schematic diagram of the management system of double source battery pack disclosed by the embodiments of the present invention.
Component label instructions
110 main battery packets
120 first switch units
130 first detection units
140 main battery packet storehouses
210 auxiliary battery packs
220 DC/DC converters
230 second detection units
240 auxiliary battery pack storehouses
260 second switch units
270 third switch units
310 common switch units
320 common detection units
400 control units
S31~S34 steps
510 receiving modules
520 judge control module
530 detection modules
540 adjustment modules
550 prompting warning modules
560 memory modules
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
Please refer to attached drawing.It should be noted that the diagram provided in following embodiment only illustrates this hair in a schematic way
Bright basic conception, component count when only display is with related component in the present invention rather than according to actual implementation in schema then,
Shape and size are drawn, and kenel, quantity and the ratio of each component can be a kind of random change during actual implementation, and its component
Being laid out kenel may also be increasingly complex.
The present invention provides a kind of double source battery pack and electric vehicles, employ the battery pack difference of different battery core standards
As main battery packet and auxiliary battery pack, and pass through the charge and discharge that DC/DC converters control auxiliary battery pack, ensure that auxiliary battery pack
Discharge-rate is remained in certain range, and can constant output；And during if there is discharge power deficiency, then by main electricity
Chi Bao is supplemented.Also, main battery packet storehouse and auxiliary battery pack storehouse are carried out separation design by the present invention so that main battery packet and
Different battery core standards not only may be used in auxiliary battery pack, and auxiliary battery pack storehouse can also be selected, then removable as desired
It is mounted in electric vehicle with unloading.In this way, more meeting the demand of the different continual mileages of driver, entirety is avoided
Crossing for battery pack designs, and reduces the cost of vehicle.Also, for the detachable auxiliary battery pack storehouse, disclose an arbitrage
The method and system being managed with entire car controller to double source battery pack
Embodiment 1
Present embodiment discloses a kind of double source battery pack applied to electric vehicle, as shown in Figure 1, including：Main battery packet
Storehouse 140 and auxiliary battery pack storehouse 240.Wherein, main battery packet storehouse 140 includes：It is main battery packet 110, first switch unit 120, public
Switch unit 310 and control unit 400.Auxiliary battery pack storehouse 240 includes：Auxiliary battery pack 210, DC/DC converters 220.Wherein,
Main battery packet storehouse 140 is the main source of electric car electric energy, is fixedly mounted on electric vehicle, is that can not change
Become and replace；Auxiliary battery pack storehouse 240 is the aiding sources of electric car electric energy, is detachably accepted to electric vehicle
On, and be connected with main battery packet storehouse 140.Preferably, auxiliary battery pack storehouse 240 and electric vehicle are carried out by mechanical quick change construction
Between replacement.That is, auxiliary battery pack storehouse 240 is can be according to the battery health and/or vehicle of auxiliary battery pack 210
Continual mileage demand is replaced, and so can more efficiently assist main battery packet 110, to meet the different need of driver
It asks.
The first end and second end of DC/DC converters 220 is connected respectively with total anode of auxiliary battery pack 210 and total negative terminal,
Total positive output end OUT1 of the third end respectively with total anode of main battery packet 110 and double source battery pack is connected, the 4th end respectively with
Total negative terminal of main battery packet 110 is connected with total negative output terminal OUT2 of double source battery pack, has been thusly-formed main battery packet 110 and auxiliary
The charge and discharge path of battery pack 210, such as 1 chain lines of attached drawing and shown in solid.Wherein, charge and discharge path includes main path, auxiliary
Path and common path.Main path (solid line where main battery packet 110 in Fig. 1) is to refer to main battery in charge and discharge path
Branching path where packet 110, which is that main battery packet 110 is dedicated；Bypass diameter (210 institute of auxiliary battery pack in Fig. 1
Solid line) for the branching path where battery pack 210 auxiliary in charge and discharge path, which is that auxiliary battery pack 210 is special
's；Common path (chain-dotted line in Fig. 1) be in charge and discharge path main battery packet 110 and auxiliary battery pack 210 in charge and discharge process
Middle be used in conjunction with path.
The battery pack of identical battery core standard had both may be used in main battery packet 110 and auxiliary battery pack 210, can also use difference
The battery pack of battery core standard.The battery core standard for the battery pack being previously mentioned in the present embodiment includes but not limited to：Shape form, material
Material, rated voltage, capacity, production time etc..
Preferably, the highest end of charge voltage of the auxiliary battery pack 210 of the present embodiment is less than the electric discharge of main battery packet 110
Blanking voltage.
The main battery packet 110 of the present embodiment uses the battery pack of better performances, preferably power energy mixed type battery core, can
Daily continual mileage after enough meeting battery pack in groups, and the instantaneous power of crest discharge can be met.Under normal conditions, main electricity
Battery core selected by pond packet 110 at least meets the requirement of the cycle life (80%) of 2500 1C charge and discharge.Auxiliary battery pack 210 is adopted
Compare battery core with the less high energy of cycle life.As previously mentioned, auxiliary battery pack 210 is primarily to meet farther continual mileage
Demand and set, the ratio that this part continual mileage accounts in the Life cycle of vehicle is no more than 10%, therefore auxiliary battery
Packet 210 selection high energy than battery core so that battery pack in groups after continual mileage can freely arrange in pairs or groups according to vehicle demand.It is preferred that
Ground, the cycle life of auxiliary battery pack 210 meet the requirement of the cycle (80%) of the 1C charge and discharge of 800 times or more.In this way, main electricity
Pond packet 110 and auxiliary battery pack 210 can both meet the needs of driver is for trip, eliminate mileage anxiety, and can reduce dynamic
The holistic cost of power battery pack enhances vehicle competitiveness.
First switch unit 120 is set on main path, for controlling the charge and discharge of main battery packet 110.Common switch list
Member 310 is set on common path, for controlling the operating mode of entire double source battery pack.First switch unit 120 is closed, and public
In the case that switch unit 310 is closed, main battery packet 110 carries out charge and discharge；It is in running order in DC/DC converters 220,
And auxiliary battery pack 210 carries out charge and discharge in the case of the closure of common switch unit 310.
DC/DC converters 220 are a switch power modules, by by the boost in voltage of auxiliary battery pack 210 or being depressured to
In the operating voltage range of main battery packet 110, and externally discharge.It also can be by the input voltage of double source battery pack simultaneously
In operating voltage range by boost or depressurization to auxiliary battery pack 210, and charge to auxiliary battery pack 210.The present embodiment
By DC/DC converters 220, traditional auxiliary battery pack 210 is broken and has had to be maintained at same or similar with main battery packet 110
Voltage platform, overcome influence of the main battery packet 110 to auxiliary battery pack 210, reduce the various aspects of auxiliary battery pack 210
(performance, voltage) requirement so that different 210 schemes of auxiliary battery pack can be applied to the double source battery pack of the present invention；Also, also
It can freely arrange according to the vehicle space unrestricted choice of electric vehicle, space availability ratio is maximized.
Preferably, the end of charge voltage of auxiliary battery pack 210 is less than the discharge cut-off voltage of main battery packet 110, in this way,
As long as DC/DC converters 220 are just in following pattern：When auxiliary battery pack 210 is discharged, DC/DC converters 220 pass through
Boost mode, to control the discharge power of auxiliary battery pack 210, so as to meet the discharge power needed for electric vehicle；In auxiliary battery
When packet 210 is charged, DC/DC converters 220 reduce the charging voltage of external input, reach and auxiliary battery pack 210 is filled
The purpose of electricity.In such cases, the structural topology of DC/DC converters 220 is relatively easy.
In the present embodiment, hard switching both may be used in first switch unit 120 and common switch unit 310, can also adopt
With Sofe Switch, and controlled by control unit 400.
Preferably, the hard switching of the present embodiment uses contactor, and (attached drawing only identifies control unit as shown in Figure 2
400th, first switch unit 120, common switch unit 310, main battery packet 110, auxiliary battery pack 210 and DC/DC converters 220),
First switch unit 120 and common switch unit 310 are realized using contactor：First switch unit 120 is included by contacting
The switch K11 and K12 of device composition；And common switch unit 310 includes the switch K31 being made of contactor.Wherein, it switchs
The disconnection of the charging and discharging circuit of K11 control main batterys packet 110 and closure；The disconnection in the preliminary filling circuit of K12 control main batterys packet 110
And closure.The switch that K31 is common path is switched, controls the charge and discharge of main battery packet or auxiliary battery pack, and ensure main battery packet
110th, the high-voltage safety of auxiliary battery pack 210 in abnormal cases.
Preferably, the Sofe Switch of the present embodiment is using IGBT or silicon carbide etc..
Control unit 400 is connected with first switch unit 120, DC/DC converters 220, common switch unit 310, uses
In control first switch unit 120 and common switch unit 310 be opened or closed and the work shape of DC/DC converters 220
State.Also, the transmission line of the control signal of the present embodiment is as shown in phantom in fig. 1.In order to realize control unit 400 to
The accurate control of one switch unit 120, DC/DC converters 220 and common switch unit 310 needs to be dependent on main battery packet
110th, the parameter of auxiliary battery pack 210.Therefore, in the present embodiment, main battery packet storehouse 140 further includes first detection unit 130 and public affairs
Detection unit 320 altogether, auxiliary battery pack storehouse 240 further includes second detection unit 230.Wherein,
First detection unit 130 is the relevant information for detecting main battery packet 110 and/or first switch unit 120, packet
It includes but is not limited to：Voltage, electric current and the temperature of main battery packet 110, working condition of first switch unit 120 etc..
Second detection unit 230 is the relevant information for detecting auxiliary battery pack 210 and/or DC/DC converters 220, packet
It includes but is not limited to：Voltage, the electric current of auxiliary battery pack 210, working condition of DC/DC converters 220 etc..
Common detection unit 320 is the relevant information for detecting common path, including but not limited to：The electricity of common path
Pressure, electric current, the working condition of common switch unit 310.
It should be noted that first detection unit 130, second detection unit 230 and public inspection that the present embodiment is proposed
It surveys unit 320 and is not only a device or chip or is realized by multiple chip portfolio uses, also, is right
Detection in voltage, electric current and temperature and the detection of the working condition for switch unit are all those skilled in the art institutes
Well known, details are not described herein again.In addition, for main battery packet 110 and auxiliary battery pack 210, according to first detection unit 130
The temperature conditions detected with second detection unit 230, when the temperature is excessively high can be to main battery packet 110, DC/DC converters 220
And/or auxiliary battery pack 210 imposes corresponding cooling treatment, to ensure main battery packet 110, DC/DC converters 220 and/or auxiliary electricity
The normal work of pond packet 210.
Also, in the double source battery pack of the present embodiment, due to auxiliary battery pack storehouse 240 be it is replaceable, starting
Auxiliary battery pack storehouse 240 is detected during work, to ensure whether auxiliary battery pack storehouse 240 installs well.Also, in order to detect
Accuracy, be also specially equipped with second storage unit (drawing not in the drawings) in each auxiliary battery pack storehouse 240, use
In the related data for preserving corresponding auxiliary battery pack 210, so that control unit 400 refers to.The related data is divided into permanent data
And real time data；So-called permanent data refers to the intrinsic supplemental characteristic of battery pack, including but not limited to：During the production of battery pack
Between, battery packet number, battery types, maximum allowable charging voltage, minimum allowable discharge voltage, maximum allowable charging current, most
It is big to allow discharge power etc.；So-called real time data refers to data of the battery pack before last time power-off, including but not limited to：Power-off
Time, fault message, remaining capacity, cell health state, total voltage, single battery core voltage etc..
Control unit 400 other than the related data preserved in the second storage unit, goes back the detection in auxiliary battery pack storehouse 240
Second detection unit 230 is dependent on for the testing result and common detection unit 320 of the voltage of auxiliary battery pack 210 to public road
The voltage detecting result of diameter.Only detecting the voltage of auxiliary battery pack 210 in auxiliary battery pack storehouse 240 and the voltage of common path
In the case of identical, it can just judge that auxiliary battery pack storehouse 240 is installed well, otherwise, control unit 400 can prompt early warning.
In addition, the detection data that control unit 400 is provided by first detection unit 130 and second detection unit 230,
The electricity of main battery packet 110 and/or auxiliary battery pack 210, remaining capacity, health status, dump energy etc. can be calculated.With
This is foundation, and first switch unit 120 and DC/DC converters 220 are accurately controlled, and is realized to main battery packet 110 or auxiliary
The accurate management of the charge and discharge of battery pack 210.
In the present embodiment, control unit 400 is realized by two ways to first switch unit 120, DC/DC converters
220 and the control of common switch unit 310：
First, control unit 400 further includes communication subelement (drawing not in the drawings), using communicating, subelement receives
The control instruction that CAN (Controller Area Network, controller local area network) network passes over refers to according to control
Order controls first switch unit 120, DC/DC converters 220 and common switch unit 310；
Second, control unit 400 is to be dependent on first detection unit 130, second detection unit 230 and common detection unit
320 testing result, is judged, with to first switch unit 120, DC/DC converters 220 and common switch unit 310 into
Row control.Under such mode, in order to coordinate control unit 400, one and control unit are provided in main battery storehouse 140
400 the first storage units being connected with main battery packet 110 (drawing not in the drawings), for preserving parameter preset and main electricity
The related data of pond packet 110.Wherein, the related data of main battery packet 110 is that the related data of auxiliary battery pack 210 is identical.Control
Unit 400 is a chip for having data processing function, to first detection unit 130, second detection unit 230 and public
The testing result of detection unit 320 is handled and is judged, is further realized to first switch unit 120, DC/DC converters
220 and the control of common switch unit 310.
Preferably, control unit 400 is to be needed by the remaining capacity of main battery packet 110 with the power for coming from electric vehicle
Seek the working condition to control DC/DC converters 220：
When the remaining capacity of main battery packet 110 is more than the first power threshold, control unit 400 controls DC/DC converters
220 do not work, i.e., auxiliary battery pack 210 is discharged without electric discharge by main battery packet 110；
When 110 remaining capacity of main battery packet is less than the first power threshold, control unit 400 controls DC/DC conversions
Device 220 is started to work so that auxiliary battery pack 210 takes over main battery packet 110 and starts to discharge.Also, in the electric discharge of auxiliary battery pack 210
When power is more than the power demand of electric vehicle, auxiliary battery pack 210 also charges to main battery packet 110 while electric discharge；
The power demand of electric vehicle can not be met in the discharge power of auxiliary battery pack 210 is, then control unit 400 controls DC/DC to turn
Parallel operation 220 exports rated power, and controls main battery packet 110 while discharge and supplemented.
Further, in the case where auxiliary battery pack 210 is discharged, when the remaining capacity of main battery packet 110 is more than the second electricity
When measuring threshold value, control unit 400 then controls DC/DC converters to be stopped, and main battery packet 110 continues to discharge.
In addition, when auxiliary battery pack 210 is discharged, if electric automobile whole suddenly slows down, when generating feedback current, DC/
DC converters 220 can stop exporting, and the energy after feedback is received completely by main battery packet.
Wherein, the first power threshold and the second power threshold are pre-set.Preferably, the first power threshold is
10%；Second power threshold is 40%.
In addition, in order to protrude the innovative part of the present invention, it will not be proposed by the invention with solution in the present embodiment
The less close unit of technical problem relationship introduces, but this does not indicate that there is no other units in the present embodiment.
It should be noted that the diagram provided in the present embodiment only illustrates the basic conception of the present invention in a schematic way,
Then in schema only display with it is of the invention in related component rather than component count, shape and size during according to actual implementation paint
System, kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout kenel also may be used during actual implementation
It can be increasingly complex.
Embodiment 2
Present embodiment discloses a kind of double source battery pack applied to electric vehicle, as shown in figure 3, including：Main battery packet
Storehouse 140 and auxiliary battery pack storehouse 240.Wherein, main battery packet storehouse 140 includes：It is main battery packet 110, first switch unit 120, public
Switch unit 310, control unit 400 and DC/DC converters 220.Auxiliary battery pack storehouse 240 only includes auxiliary battery pack 210.
Double source battery pack disclosed in the present embodiment is only DC/DC converters 220 with double source battery pack disclosed in embodiment 1
Installation site it is different, be mounted in main battery packet storehouse 140.It corresponds, second detection unit 230 is only used for realization pair
The detection of the voltage of auxiliary battery pack 210, electric current, temperature and insulation resistance, and first detection unit 130 is in addition to being used to detect main electricity
Outside voltage, electric current, temperature and the insulation resistance of pond packet 110 and the working condition of first switch unit 120, it is additionally operable to detect
The working condition of DC/DC converters 220 in main battery packet 140.
The operation principle and connection relation of entire double source battery pack, identical with embodiment 1, details are not described herein.
Embodiment 3
Present embodiment discloses a kind of double source battery pack applied to electric vehicle, as shown in figure 4, including：Main battery packet
Storehouse 140 and auxiliary battery pack storehouse 240.Wherein, main battery packet storehouse 140 includes：It is main battery packet 110, first switch unit 120, public
Switch unit 310, control unit 400 and DC/DC converters 220.It is opened including auxiliary battery pack 210 and second in auxiliary battery pack storehouse 240
Close unit 260.Wherein, second switch unit 260 is be connected to total anode of auxiliary battery pack 210 and DC/DC converters 220 the
Between one end.Since the DC/DC converters 220 for controlling auxiliary battery pack 210 are not mounted on auxiliary electricity simultaneously with auxiliary battery pack 210
In Chi Bao storehouses 240, therefore, considering based on safety is additionally arranged second switch unit 260 in total anode of auxiliary battery pack 210,
So that auxiliary battery pack storehouse 240 is safer during dismounting.
Also, in double source battery pack shown in Fig. 4, second detection unit 230 in addition to auxiliary battery pack 210 voltage,
Electric current, temperature and insulation resistance will also be detected the working condition of second switch unit 260 outside being detected.For DC/
The detection of the working condition of DC converters 220 equally changes to be realized by first detection unit 130.
Further, as shown in figure 5, can also be in auxiliary battery pack storehouse 240, the total negative terminal and DC/DC of auxiliary battery pack 210
Third switch unit 270 is set between the second end of converter 220, to reach the dual of the safety to auxiliary battery pack storehouse 240
Protection.Also, in double source battery pack shown in fig. 5, second detection unit 230 in addition to the voltage of auxiliary battery pack 210, electric current,
It, will also be to the working condition of second switch unit 260 and/or third switch unit 270 outside temperature and insulation resistance are detected
It is detected.The detection of the working condition of DC/DC converters 220 is equally changed and is realized by first detection unit 130.
In addition, the first switch unit 120 in second switch unit 260 and/or third switch unit 270 such as embodiment 1
Equally, hard switching both may be used, Sofe Switch can also be used, details are not described herein again.
The operation principle of the DC/DC converters 220 of the double source battery pack of the present embodiment is similarly same as Example 1,
This is just repeated no more.Only, when controlling auxiliary battery pack 210, only in second switch unit 260 or second switch
It, just can be by controlling the working conditions of DC/DC converters 220 when unit 260 and third switch unit 270 are closed at, control
Make the charge and discharge of auxiliary battery pack 210；Otherwise, as long as second switch unit 260 or third switch unit 270 disconnect, auxiliary battery
Packet 210 can not carry out charge and discharge.
Embodiment 4
Present embodiment discloses a kind of management method of double source battery pack, applied to having used such as embodiment 1,2 or 3 disclosures
Double source battery pack electric vehicle entire car controller (Vehicle Control Unit), with realize to double source battery pack
Main battery packet storehouse and the management in auxiliary battery pack storehouse.
As shown in fig. 6, the management method of the double source battery pack of the present embodiment includes：
Step S31 receives the continual mileage demand of driver：
Driver inputs its estimated continual mileage demand by the panel of entire car controller.For example, driver beats today
It calculates from the round-trip Suzhou of Shanghai self-driving, that is to say, that continual mileage demand is at 220 kilometers or so.It should be noted that the present embodiment
The continual mileage demand of disclosed reception driver is not limited in driver and directly inputs a kind of continual mileage demand this feelings
Condition can also input corresponding destination-address, by the continual mileage demand needed for navigation equipment statistics and be supplied to vehicle
Controller.Therefore, as long as the mode of corresponding continual mileage demand can be provided for entire car controller in the guarantor of the present invention
In the range of shield.
Step S32 judges the continual mileage demand of driver：
When continual mileage demand is less than the first mileage threshold value, then do not prompt auxiliary battery pack storehouse to be installed, and jump to step
S34；
When continual mileage demand is more than the first mileage threshold value, then prompt auxiliary battery pack storehouse to be installed, and jump to step
S33；
Preferably, in order to realize the more accurate management to double source battery pack, therefore, to continual mileage demand and the
After one mileage threshold value is judged, continual mileage demand and the second mileage threshold value can also be judged again, i.e.,：
When continual mileage demand is less than the second mileage threshold value, then auxiliary battery pack storehouse of the installation with low battery is prompted；And
Jump to step S33；
When continual mileage demand is more than the second mileage threshold value, then auxiliary battery pack storehouse of the installation with high electricity is prompted；And
Jump to step S33.
In the present embodiment, the first mileage threshold value and the second mileage threshold value are all based on the daily average traveling of electric vehicle
Mileage statistical value and it is preset.Preferably, the first mileage threshold value is 150 kilometers, and the second mileage threshold value is 250 kilometers.
Since the auxiliary battery pack storehouse of the separate type double source battery pack of embodiment 1,2 or 3 is removably and main battery packet one
As disclosure satisfy that 150 kilometers of continual mileage demand, therefore, when less than the first mileage threshold value, then do not need to additionally install auxiliary
Battery pack storehouse.Also, according to different continual mileage demands, the battery pack storehouse that installation has different electricity can be prompted as auxiliary
Battery pack storehouse.For example, the round-trip Suzhou of Shanghai self-driving, continual mileage demand is at 220 kilometers, as long as therefore according to low battery
Auxiliary battery pack storehouse can meet demand.
Step S33 detects whether auxiliary battery pack storehouse installs well using the control unit of double source battery pack：
If installation is good, step S34 is jumped to；
If do not installed, early warning is prompted.
The control unit of double source battery pack has had been described in detail the detection in auxiliary battery pack storehouse in embodiment 1,
It no longer writes herein.
Step S34 adjusts the power output of double source battery pack, and different auxiliary battery pack storehouses varies in weight, uneasy in selection
When filling the auxiliary battery pack storehouse of auxiliary battery pack storehouse or installation with low battery, system can adaptively reduce output power, in not shadow
Energy loss is reduced in the case of ringing dynamic property, increases continual mileage.
Wherein, the power output of adjustment double source battery pack had both included the power output of adjustment main battery packet, also included adjustment
The power output of main battery packet and auxiliary battery pack.
The step of above method, divides, and is intended merely to describe clear, and when realization can be merged into a step or to certain
A little steps are split, and multiple steps are decomposed into, as long as comprising identical logical relation, within the protection scope of the present patent；
To inessential modification is either added in algorithm in flow or introduces inessential design, but do not change its algorithm and stream
The core design of journey is all in the protection domain of the patent.
Embodiment 5
Present embodiment discloses a kind of management system of double source battery pack, applied to the double source electricity used such as embodiment 1
The entire car controller of the electric vehicle of Chi Bao.And the management system of the double source battery pack is connected with double source battery pack.
As shown in fig. 7, the management system of the battery pack of the present embodiment includes：Receiving module 510 judges control module 520,
Detection module 530, adjustment module 540, prompting warning module 550, memory module 560.
Wherein, receiving module 510 is used to receive the continual mileage demand that driver is provided；
Control module 520 is judged for judging continual mileage demand：
When continual mileage demand is less than the first mileage threshold value, then auxiliary battery pack storehouse is not installed；
When continual mileage demand is between the first mileage threshold value and the second mileage threshold value, then by prompting warning module
550 auxiliary battery pack storehouses of the prompting installation with low battery；
When continual mileage demand is more than the second mileage threshold value, then by prompting the prompting installation of warning module 550 that there is height
The auxiliary battery pack storehouse of electricity.
Detection module 530 is used to detect whether auxiliary battery pack storehouse installs well using the control unit of double source battery pack, and
In the case that detect auxiliary battery pack storehouse do not install it is good, by prompt warning module 550 carry out early warning.
Adjustment module 540 is used to adjust the power output of double source battery pack.
Warning module 550 is prompted to be used to provide corresponding prompting and early warning to driver.Such as；Prompting installation low battery
Auxiliary battery pack, auxiliary battery pack are not installed good etc..
Memory module 560 is used to preserve preset first mileage threshold value and the second mileage threshold value.
In addition, in order to protrude the innovative part of the present invention, it will not be proposed by the invention with solution in the present embodiment
The less close unit of technical problem relationship introduces, but this does not indicate that there is no other units in the present embodiment.
And it is not difficult to find that the present embodiment be with the corresponding system embodiment of second embodiment, the present embodiment can be with
Four embodiments are worked in coordination implementation.The relevant technical details mentioned in fourth embodiment are still effective in the present embodiment, in order to
It reduces and repeats, which is not described herein again.Correspondingly, the relevant technical details mentioned in the present embodiment are also applicable in fourth embodiment
In.
In conclusion a kind of double source battery pack and electric vehicle of the present invention, using the battery pack of different battery core standards
Respectively as main battery packet and auxiliary battery pack, and pass through the charge and discharge that DC/DC converters control auxiliary battery pack, ensure that auxiliary battery
The discharge-rate of packet is remained in certain range, and can constant output；And during if there is discharge power deficiency, then by
Main battery packet is supplemented, and this measure effectively compensates for the defects of high energy is than between battery core multiplying power discharging and service life；The present invention passes through
Use the power battery (main battery packet and auxiliary battery pack) of different battery core standards so that double source battery pack saves compared with primary battery group
The cost of about 10%-30%；The present invention can also ensure that the dynamic property of the vehicle of electric vehicle, economy are not influenced by battery
And it reduces；Invention enhances the safety redundancies of electric vehicle, even if a battery pack breaks down, driver also can be by vehicle
Reach destination or 4S repairs；Under the premise of meeting the needs of driver's trip, mileage anxiety is eliminated, and can reduce
The holistic cost of electrokinetic cell system enhances vehicle competitiveness；Since auxiliary battery pack storehouse is removably, so the present invention can
Double source battery pack is managed according to the continual mileage demand of driver, for different continual mileage demands, prompts installation
The auxiliary battery pack storehouse of auxiliary battery pack with different electricity so that the main battery packet storehouse of double source battery pack can be with different auxiliary electricity
Chi Bao storehouses carry out flexible combination, to meet different continual mileages, adaptively meet the continual mileage demand of driver.Institute
With the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (12)
1. a kind of double source battery pack, which is characterized in that applied to electric vehicle, the double source battery pack includes：Main battery packet storehouse
With auxiliary battery pack storehouse；
The main battery packet storehouse is fixed in the electric vehicle, including main battery packet and control unit；The auxiliary battery pack storehouse
It is removably mounted in the electric vehicle by mechanical quick change construction, including auxiliary battery pack；The main battery Bao Cangyu institutes
Auxiliary battery pack storehouse is stated to be connected；
The double source battery pack further includes DC/DC converters, and first end and second end is connected to the auxiliary battery pack
Total anode and total negative terminal, third end respectively with total anode of the main battery packet and total positive output end phase of the double source battery pack
Even, total negative output terminal of the 4th end respectively with total negative terminal of the main battery packet and the double source battery pack is connected；So as to be formed
The charge and discharge path of the main battery packet and the auxiliary battery pack；And the DC/DC converters be located at the main battery packet storehouse or
The auxiliary battery pack storehouse；
Described control unit is connected respectively with the DC/DC converters, the main battery packet and the auxiliary battery pack, the control
Unit realizes the charge and discharge control to the auxiliary battery pack by controlling the working conditions of the DC/DC converters；
The main battery packet is different with the battery core standard of the auxiliary battery pack；
Wherein, the main battery packet storehouse further includes first switch unit, common switch unit and the first storage unit；The auxiliary electricity
Chi Bao storehouses further include the second storage unit；
The charge and discharge path includes being exclusively used in the main path of the main battery packet charge and discharge and for the main battery packet and described
The common path of the auxiliary common charge and discharge of battery pack；
The first switch unit is set on the main path, for controlling the charge and discharge of the main battery packet；
The common switch unit is set on the common path, for controlling the main battery packet and the auxiliary battery pack
Charge and discharge；
First storage unit is connected with the main battery packet and described control unit, for preserving the phase of the main battery packet
Close data；
Second storage unit is connected with the auxiliary battery pack and described control unit, for preserving the phase of the auxiliary battery pack
Close data.
2. double source battery pack according to claim 1, it is characterised in that：The battery core standard includes：Shape form, material
Material, rated voltage, capacity, production time.
3. double source battery pack according to claim 1, it is characterised in that：The auxiliary battery pack including the auxiliary battery pack
Storehouse carries out selection installation according to practical continual mileage demand.
4. double source battery pack according to claim 1, it is characterised in that：Described control unit is according to the electric vehicle institute
The power demand needed controls the DC/DC converters to realize the control to the discharge power of the auxiliary battery pack by boost or depressurization
System；In the auxiliary battery pack charging, charging termination condition of the described control unit according to the auxiliary battery pack, described in control
DC/DC converters realize the charging process to the auxiliary battery pack by boost or depressurization.
5. double source battery pack according to claim 4, it is characterised in that：When the end of charge voltage of the auxiliary battery pack is small
In the case of the discharge cut-off voltage of the main battery packet：In the auxiliary battery pack electric discharge, described control unit control institute
DC/DC converters are stated by control of the realization to the discharge power of the auxiliary battery of boosting, to meet needed for the electric vehicle
Discharge power；In the auxiliary battery pack charging, described control unit controls the DC/DC converters to be realized by being depressured
To the charging process of the auxiliary battery pack.
6. double source battery pack according to claim 1, it is characterised in that：Described control unit is to be dependent on the main battery
The remaining capacity of packet and power demand from the electric vehicle control the working condition of the DC/DC converters.
7. double source battery pack according to claim 6, it is characterised in that：
When the remaining capacity of the main battery packet is less than the first power threshold, then described control unit controls the DC/DC to turn
Parallel operation is started to work, and the auxiliary battery pack takes over the main battery and unwraps beginning electric discharge, and is filled simultaneously for the main battery packet
Electricity；
When the remaining capacity of the main battery packet is more than the second power threshold, then described control unit controls the DC/DC to turn
Parallel operation is stopped, and the main battery unwraps beginning electric discharge；
First power threshold is less than second power threshold.
8. double source battery pack according to claim 6, it is characterised in that：Discharge condition is in the auxiliary battery pack, and
When the discharge power exported after the DC/DC converters can not meet the power demand of the electric vehicle, then the control
Unit is discharged, and control the main battery by controlling the DC/DC converters with the rated power of the auxiliary battery pack
Electric discharge is supplemented packet simultaneously.
9. double source battery pack according to claim 1, it is characterised in that：When the DC/DC converters are located at the main electricity
During Chi Bao storehouses；The double source battery pack further includes the second switch unit in the auxiliary battery pack storehouse；
The second switch unit is connected between total anode of the auxiliary battery pack and the first end of the DC/DC converters,
For controlling the charge and discharge of the auxiliary battery pack.
10. double source battery pack according to claim 9, it is characterised in that：The double source battery pack is further included positioned at described
Third switch unit in auxiliary battery pack storehouse；The third switch unit be connected to total negative terminal of the auxiliary battery pack with it is described
Between the second end of DC/DC converters, for controlling the charge and discharge of the auxiliary battery pack.
11. a kind of electric vehicle, it is characterised in that：The electric vehicle is used as described in any one in claim 1-10
Double source battery pack.
12. a kind of management system of double source battery pack, it is characterised in that：Applied to the entire car controller of electric vehicle, and it is described
The auxiliary battery pack storehouse of double source battery pack is removably mounted on by mechanical quick change construction in the electric vehicle；The double source electricity
Pond is assured reason system and is included：
Receiving module, for receiving the continual mileage demand that driver is provided；
Control module is judged, for being commented according to preset first mileage threshold value and the second mileage threshold value continual mileage demand
Sentence and control；
Detection module, for detecting whether the auxiliary battery pack storehouse installs well using the control unit of the double source battery pack；
Warning module is prompted, for the inspection according to the judge control result and/or the detection module for judging control module
It surveys as a result, making prompting or early warning to driver；
Module is adjusted, for adjusting the power output of the double source battery pack；
Memory module, for preserving the first mileage threshold value and the second mileage threshold value.
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| CN108749617B (en) * | 2018-06-11 | 2020-03-24 | 浙江衡远新能源科技有限公司 | Replaceable battery control system of electric automobile |
| CN109038739A (en) * | 2018-08-14 | 2018-12-18 | 爱驰汽车有限公司 | Adjustable dual battery system and its control method and automobile |
| CN109193047A (en) * | 2018-09-07 | 2019-01-11 | 威马智慧出行科技（上海）有限公司 | A kind of extended-range battery system |
| CN110329106A (en) * | 2018-09-14 | 2019-10-15 | 张东才 | A kind of quick charging system and method for the electric vehicle without charging pile |
| CN109823214A (en) * | 2019-02-03 | 2019-05-31 | 爱驰汽车有限公司 | Double cell packet power supply unit and its control method |
| CN109823231A (en) * | 2019-03-25 | 2019-05-31 | 爱驰汽车有限公司 | Energy management system, method, equipment and the storage medium of vehicle-mounted double source battery pack |
| CN109910678B (en) * | 2019-03-25 | 2021-03-30 | 爱驰汽车有限公司 | Energy charging system, method, device and storage medium for vehicle-mounted dual-source battery pack |
| CN112757882A (en) * | 2019-11-06 | 2021-05-07 | 观致汽车有限公司 | Battery pack and management method and system thereof |
| CN111231690A (en) * | 2020-03-20 | 2020-06-05 | 张东才 | System for charging electric vehicle by using solar energy, and related device and method |
| CN115179813A (en) * | 2021-03-23 | 2022-10-14 | 上海比耐信息科技有限公司 | Electric automobile energy management system and method |
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