CN110116653A - Drive system of electric automobile, driving circuit and batteries of electric automobile heating means - Google Patents
Drive system of electric automobile, driving circuit and batteries of electric automobile heating means Download PDFInfo
- Publication number
- CN110116653A CN110116653A CN201910317285.4A CN201910317285A CN110116653A CN 110116653 A CN110116653 A CN 110116653A CN 201910317285 A CN201910317285 A CN 201910317285A CN 110116653 A CN110116653 A CN 110116653A
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- bridge arm
- battery pack
- battery
- phase motor
- controller
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 claims description 29
- 230000005611 electricity Effects 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001360 synchronised effect Effects 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a kind of drive system of electric automobile, driving circuit and batteries of electric automobile heating means.The drive system of electric motor vehicle includes the first controller, power supply unit and inverter circuit.Said supply unit includes two battery packs.When heating to batteries of electric automobile, one end of two battery packs is mutually indepedent, and the other end of two battery packs is conllinear.The batteries of electric automobile heating means control the opening and closing of three bridge arms of the inverter circuit by first controller, mutual charge and discharge between battery packs described two under the auxiliary of electrical-coil, and then said supply unit itself is made to polarize, to realize that the battery of said supply unit controllably heats up.The maximum operating currenbt of device for power switching in the inverter circuit is higher, and the batteries of electric automobile heating means can realize high-power heating using the drive system of electric automobile on the basis of not increasing other devices, effectively increase heating efficiency.
Description
Technical field
This application involves new-energy automobile fields, more particularly to a kind of drive system of electric automobile, driving circuit and electricity
Electrical automobile battery heating means.
Background technique
Characteristic attenuation under lithium battery low temperature.In winter or cold district, it first has in electric car use process to battery
It is heated, the continual mileage and charging performance of electric car could be promoted.
In traditional scheme battery pack heat protocol include by charger/charging pile to battery carry out outside heat, but
The program only charges Shi Keyong in electric car, is unable to satisfy low temperature when electric car is not connected to charging pile and shelves starting and asks
Topic.Battery pack heat protocol further includes by the way that the method for heating nickel sheet, but the program is added in inside battery in traditional scheme
The energy density of battery, the battery cost of raising are reduced, and there is a certain security risk.
Battery pack heat protocol further includes that heating element is installed in battery pack in traditional scheme, passes through outside heating
Mode promotes battery temperature.Such mode increases battery cost and heating efficiency and heating power be not high.
Summary of the invention
Based on this, it is necessary to for traditional battery pack heating power and the low problem of heating efficiency, provide a kind of electronic vapour
Motor vehicle drive system, driving circuit and batteries of electric automobile heating means.
A kind of driving circuit, comprising:
Power supply unit, including the first battery pack and the second battery pack；And
Inverter circuit, including the first bridge arm, the second bridge arm and third bridge arm；
The first electrode of first battery pack is connect with the upper bridge arm of first bridge arm by the first bus, and described
The first electrode of two battery packs is female by second with the upper bridge arm of the upper bridge arm of second bridge arm and the third bridge arm respectively
Line connection；
The second electrode of the second electrode of first battery pack and second battery pack is collinearly to form first end；
The lower bridge arm of the lower bridge arm of first bridge arm, the lower bridge arm of second bridge arm and the third bridge arm collinearly with
Form second end；
The first end is connect with the second end bus.
A kind of drive system of electric automobile, comprising:
Driving circuit described in any one of above-described embodiment；
Battery management circuit is electrically connected with the driving circuit；
First controller is electrically connected with the driving circuit；And
Second detection circuit is electrically connected with first controller.
A kind of batteries of electric automobile heating means realize that the batteries of electric automobile heats using drive system of electric automobile
Method；
The drive system of electric automobile include driving circuit, the battery management circuit being electrically connected with the driving circuit with
And the first controller being electrically connected with the driving circuit；
The driving circuit includes the power supply unit and inverter circuit connected by bus, and said supply unit includes first
Battery pack and the second battery pack；The inverter circuit includes three bridge arms；The first electrode of first battery pack and described three
The upper bridge arm of a bridge arm is connected by the first bus in a bridge arm, and the first electrode of second battery pack is respectively with described three
The upper bridge arm of remaining two bridge arms is connected by the second bus in a bridge arm；
After the second electrode of the second electrode of first battery pack and second battery pack is conllinear, with three bridges
The lower bridge arm bus of arm connects；
The batteries of electric automobile heating means include:
S10, before electric car starting, by the battery management circuit judge the electric car whether need into
The heating of row battery；
S20 is controlled described inverse after confirming that the electric car needs to carry out battery heating by first controller
Power transformation road, so that first battery pack charges to second battery pack；
S30 passes through institute after first battery pack reaches first time threshold to the second battery pack charging time
It states the first controller and controls the inverter circuit, so that second battery pack charges to first battery pack, the power supply
Unit itself polarizes during charging and discharging, to realize the controllable liter of each battery pack in said supply unit
Temperature.
The application provides a kind of drive system of electric automobile, driving circuit and batteries of electric automobile heating means.The electricity
Vehicle driving system includes the first controller, power supply unit and inverter circuit.Said supply unit includes two battery packs.When
When heating to batteries of electric automobile, one end of two battery packs is mutually indepedent, the other end of two battery packs
Collinearly.The lower bridge arm of three bridge arms in the inverter circuit is conllinear.A bridge arm in three bridge arms in the inverter circuit
Upper bridge arm connect with the independent one end bus of a battery pack.Remaining two bridges in three bridge arms in the inverter circuit
The upper bridge arm of arm is connect with the independent one end bus of another battery pack.First controller is electrically connected with the inverter circuit
It connects.The batteries of electric automobile heating means are opened by three bridge arms that first controller controls the inverter circuit
It closes, to complete energy output and the energy regenerating of said supply unit, and then said supply unit itself is made to polarize, thus
Realize that the battery of said supply unit controllably heats up.The maximum operating currenbt of device for power switching in the inverter circuit compared with
Height, and the batteries of electric automobile heating means can not increase other devices using the drive system of electric automobile
On the basis of realize high-power heating, effectively increase heating efficiency.
Detailed description of the invention
Fig. 1 is a kind of driving circuit figure that the application one embodiment provides；
Fig. 2 is a kind of driving circuit figure that the application one embodiment provides；
Fig. 3 is a kind of drive system of electric automobile figure that the application one embodiment provides；
Fig. 4 is a kind of drive system of electric automobile figure that the application one embodiment provides；
Fig. 5 is a kind of batteries of electric automobile heating procedure figure that the application one embodiment provides；
Fig. 6 is a kind of batteries of electric automobile heating procedure figure that the application one embodiment provides；
Fig. 7 is a kind of batteries of electric automobile heating procedure figure that the application one embodiment provides；
Fig. 8 is a kind of battery pack current curve graph that the application one embodiment provides.
Main element drawing reference numeral explanation
100 second by-pass switch of driving circuit, 130 battery management circuit 40
10 inverter circuit of power supply unit, 20 first detection circuit 41
First 11 first bridge arm of battery pack, 21 voltage detection unit 411
Second 12 second bridge arm of battery pack, 22 current detecting unit 412
140 third bridge arm of state switch, 23 temperature monitoring unit 413
101 second end of first end, 201 second controller 42
110 device for power switching of battery unit, 211 first controller 50
111 three-phase motor of battery core, 30 second detection circuit 60
First by-pass switch, 120 drive system of electric automobile 200
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing to the application
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this Shen
Please.But the application can be implemented with being much different from other way described herein, those skilled in the art can be not
Similar improvement is done in the case where violating the application intension, therefore the application is not limited by following public specific implementation.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Figure 1, the application one embodiment provides a kind of driving circuit 100.The driving circuit 100 includes power supply
Unit 10 and inverter circuit 20.
Said supply unit 10 includes the first battery pack 11 and the second battery pack 12.The inverter circuit 20 includes the first bridge
Arm 21, the second bridge arm 22 and third bridge arm 23.The upper bridge of the first electrode of first battery pack 11 and first bridge arm 21
The connection of arm bus.The first electrode of second battery pack 12 respectively with the upper bridge arm of second bridge arm 22 and the third bridge
The upper bridge arm bus of arm 23 connects.The second electrode of the second electrode of first battery pack 11 and second battery pack 12 is total
Line is to form first end 101.The lower bridge arm of first bridge arm 21, the lower bridge arm of second bridge arm 22 and the third bridge arm
23 lower bridge arm is collinearly to form second end 201.The first end 101 is connect with 201 bus of second end.First electricity
Pond group 11 has equivalent resistance R1.Second battery pack 12 has equivalent resistance R2.
The first electrode can be the anode of battery.The first electrode can also be the cathode of battery.Described second
Electrode can be the anode of battery.The second electrode can also be the cathode of battery.When the anode of first battery pack 11
When with the anode of second battery pack 12 as first electrode.Three bridge arms of the inverter 20 only one end be connected in parallel to it is same
Potential point.Two bridge arms in three bridge arms are connected in parallel to same potential point in the other end.It is remaining in three bridge arms
The other end of one bridge arm is independently connected to another potential point.
In the present embodiment, said supply unit 10 includes two battery packs.The inverter circuit 20 includes three bridge arms.Institute
The one end for stating the first battery pack 11 is connect with the upper bridge arm of first bridge arm 21 by the first bus.Second battery pack 12
One end connect respectively with the upper bridge arm of the upper bridge arm of second bridge arm 22 and the third bridge arm 23 by the second bus.One
The other end of a battery pack and the other end of another battery pack are conllinear.The lower bridge arm of three bridge arms is conllinear.Conllinear
Lower bridge arm one end conllinear with battery pack is connected.Described two battery packs are mutually indepedent, so that the driving circuit 100 has more
Multiple degrees of freedom.The driving circuit 100 can realize heating function and the parking of battery on the basis of not increasing other devices
Equalization function.It include two battery packs in the driving circuit 100, compared with three traditional battery-powered modes, this
The embodiment of power supply in embodiment reduces battery pack all the way, so as to reduce voltage sampling circuit all the way, Jin Er
The cost of battery management system can be reduced to a certain extent.
Fig. 2 is referred to, in one embodiment, the driving circuit 100 further includes state switch 140.The shape
State switching switch 140 is set between first bus and second bus.The driving circuit 100 can be set to electricity
Electrical automobile driving circuit.When the electric car is in driving condition, it is closed the state switch 140.When the electricity
When electrical automobile is in low-temperature heat state, the state switch 140 is disconnected.
It, can be with by the state switch 140 when the electric car is in different states in the present embodiment
The effective relationship changed between said supply unit 10 and the inverter circuit 20.When the electric car is in driving condition
When, it is closed the state switch 140.At this point, the upper bridge arm of three bridge arms of the inverter circuit 20 is conllinear.The inversion
The lower bridge arm bridge arm of three bridge arms of circuit 20 is conllinear.At this point, can be real by inverter circuit 20 described in traditional vector controlled
The driving of the existing electric car, reduces the cost for controlling the inverter circuit 20.When the electric car adds in low temperature
Warm status when needing to heat the battery pack in said supply unit 10, disconnects the state switch 140.At this point,
Only one end is connected in parallel to same potential point to three bridge arms of the inverter 20.Two in three bridge arms are in parallel in the other end
To same potential point.The other end of a remaining bridge arm is independently connected to another potential point in three bridge arms.It is described
Two battery packs are mutually indepedent, so that the driving circuit has more freedom.The driving circuit 100 can not increase
The heating function of battery is realized on the basis of other devices.
Each battery pack in said supply unit 10 includes 110 He of battery unit in one of the embodiments,
One the first by-pass switch 120.
One battery unit 110 and first by-pass switch 120 are connected in series.In said supply unit 10
Including multiple battery cores 111.The model of the multiple battery core 111, nominal capacity can be identical.The multiple battery core 111 can be put down
It is divided into three groups.Multiple battery cores 111 are interconnected so as to form a battery unit 110 in every group.One battery unit 110
In the battery core 111 connection type and the battery core 111 in battery unit 110 described in another two connection type phase
Together.The connection type is series connection, multiple battery cores after multiple series connection of battery core 111, multiple 111 parallel connections of battery core
One of parallel connection after 111 in parallel or multiple battery cores 111 are connected.
First by-pass switch 120 can be a relay.First by-pass switch 120 can also for one after
Switching circuit after electric appliance is in parallel with concatenated preliminary filling relay, precharge group.First by-pass switch 120 is electromagnetism relay
One of device, insulated gate bipolar transistor or Metal-Oxide Semiconductor field effect transistor.
In the present embodiment, each battery pack connects first by-pass switch 120, may be implemented to each battery pack
Independent control.When one of battery failure, by disconnecting the first by-pass switch 120 connecting with fail battery group,
Being isolated for fail battery group and normal battery may be implemented
The driving circuit 100 further includes the second by-pass switch 130 in one of the embodiments,.
Second by-pass switch 130 is electrically connected between the first end 101 and the second end 201.Described second
By-pass switch 130 can be a relay.Second by-pass switch 130 can also be a relay and concatenated preliminary filling
Switching circuit after relay, precharge group are in parallel.Second by-pass switch 130 is electromagnetic relay, insulated gate bipolar
One of transistor or Metal-Oxide Semiconductor field effect transistor.By disconnecting second by-pass switch 130,
It can achieve the purpose for disconnecting said supply unit 10 and the inverter circuit 20.
Each bridge arm in the inverter circuit 20 includes two concatenated power switch devices in one of the embodiments,
Part 211.
The collector terminal of a device for power switching 211 in described two concatenated device for power switching 211 with one
The positive electrode bus of battery pack connects.Another device for power switching 211 in described two concatenated device for power switching 211
Emitter terminal is connect with the negative electrode bus of a battery pack.One device for power switching 211 of each bridge arm may be constructed
The upper bridge arm of one bridge arm.Another device for power switching 211 of each bridge arm may be constructed the lower bridge arm of a bridge arm.
The bridge arm can be insulated gate bipolar transistor.The three-phase output end of the inverter circuit 20 respectively with three-phase motor 30
Three-phase bus W, U, V are connected.The three-phase motor 30 can be three-phase synchronous motor.The three-phase motor 30 can also be three-phase
Asynchronous machine.The inverter circuit 20 can export the frequency of up to several hundred upper kilocycles, may be implemented to the driving circuit 100
In various revolving speeds motor driving.
Fig. 3 is referred to, the application one embodiment provides a kind of drive system of electric automobile 200.The electric car drives
Dynamic system 200 includes driving circuit 100, battery management circuit 40, the first controller 50 and the second detection circuit 60.
The battery management circuit 40 is electrically connected with the driving circuit 100.First controller 50 and the driving
Circuit 100 is electrically connected.Second detection circuit 60 is electrically connected with first controller 50.The drive in the present embodiment
Dynamic circuit 100 is similar to the driving method of the driving circuit 100 in above-described embodiment, and details are not described herein again.The battery
Management circuit 40 is used to detect the state-of-charge of said supply unit 10 and the working condition of said supply unit 10.The battery
Management circuit 40 is also used to manage said supply unit 10.For example, the battery management circuit 40 can control it is described
The opening and closing of first by-pass switch 120 and second by-pass switch 130 in power supply unit 10.First controller 50
It is combined for controlling the fixed conducting power switch 211 of the inverter circuit 20.The battery management circuit 40 and described the
Pass through isolation signals circuit connection between one controller 50.Second detection circuit 60 is for detecting the three-phase motor 30
Induced current.Second detection circuit 60 is also used to the faradic amplitude information being reported to first controller
50.First controller 50 can control the inverter circuit 20 according to the amplitude information.
In the present embodiment, the drive system of electric automobile 200 includes driving circuit 100, battery management circuit 40 and the
One controller 50.Said supply unit 10 in the driving circuit 100 includes two battery packs.The inverter circuit 20 includes
Three bridge arms.One end of first battery pack 11 is connect with the upper bridge arm of first bridge arm 21 by the first bus.It is described
One end of second battery pack 12 passes through the with the upper bridge arm of the upper bridge arm of second bridge arm 22 and the third bridge arm 23 respectively
The connection of two buses.The other end of one battery pack and the other end of another battery pack are conllinear.The lower bridge of three bridge arms
Arm is conllinear.Conllinear lower bridge arm one end conllinear with battery pack is connected.Described two battery packs are mutually indepedent, so that the driving
Circuit 100 has more freedom.The drive system of electric automobile 200 can be realized on the basis of not increasing other devices
Driving function, heating function and the parking equalization function of batteries of electric automobile.
Fig. 4 is referred to, the electric vehicle has control centre in one of the embodiments,.The battery management circuit
40 include the first detection circuit 41 and second controller 42.
First detection circuit 41 includes voltage detection unit 411, current detecting unit 412 and temperature detecting unit
413, the voltage detection unit 411, the current detecting unit 412 and the temperature detecting unit 413 respectively with the confession
Electric unit 10 is electrically connected.The second controller 42 is electrically connected with said supply unit 10.
Voltage, electric current and the temperature signal that first detection circuit 41 will test are reported to the electric car
Control centre.The control centre passes through first controller 50 and second control according to the signal received
Device 42 drives the driving circuit 100, brakes, heating and parking equilibrium controls.The battery management circuit 40 is logical
Cross first detection circuit 41 and the second controller 42 may be implemented rapidly and efficiently detect said supply unit 10
In two battery packs each performance parameter.
Fig. 5 is referred to, a kind of batteries of electric automobile heating means are provided in the application one embodiment.Using described electronic
Automobile driving system 200 realizes the batteries of electric automobile heating means.The batteries of electric automobile heating means include:
S10 judges whether the electric car needs by the battery management circuit 40 before the electric car starting
Carry out battery heating.In step S10, it can judge whether the electric car is in by detecting the temperature of battery battery core
Low-temperature heat state.
S20 is controlled described after confirming that the electric car needs to carry out battery heating by first controller 50
Inverter circuit 20, so that first battery pack 11 charges to second battery pack 12.In step S20, by described in control
The switch state of three bridge arms of inverter circuit 20 may be implemented first battery pack 11 and first fill to the three-phase motor 30
Electricity, the process that then first battery pack 11 and the three-phase motor 30 charge to second battery pack 12 together.At this
It during one, removes outside necessary electric quantity consumption, overall performance is that first battery pack 11 is filled to second battery pack 12
Electricity.
S30 leads to after first battery pack 11 reaches first time threshold to 12 charging time of the second battery pack
It crosses first controller 50 and controls the inverter circuit 20, so that second battery pack 12 is filled to first battery pack 11
Electricity, said supply unit 10 itself polarize during charging and discharging, to realize each in said supply unit 10
The controllable heating of battery pack.
In step S30, the switch state of three bridge arms by controlling the inverter circuit 20 may be implemented described second
Battery pack 12 charges to the three-phase motor 30 first, and then electric two battery pack 12 and the three-phase motor 30 are together to institute
State the process of the first battery pack 11 charging.In this course, it removes outside necessary electric quantity consumption, overall performance is described second
Battery pack 12 charges to first battery pack 11.
In the present embodiment, the batteries of electric automobile heating means control the inversion electricity by first controller 50
The opening and closing of three bridge arms on road 20 to complete energy output and the energy regenerating of said supply unit 10, and then makes the power supply
Unit 10 itself polarizes, to realize that the battery of said supply unit 10 controllably heats up.Function in the inverter circuit 20
The maximum operating currenbt of the maximum operating currenbt of rate switching device 211 and the three-phase motor 30 is higher.The electric car electricity
High-power heating may be implemented in pond heating means, effectively increases heating efficiency.The device for power switching 211 is as control member
Part, the three-phase motor 30 are used as energy-storage travelling wave tube.Without adding special heating element in battery heating process, thus reduce
Power system of electric automobile cost.The batteries of electric automobile heating means also achieve institute while heating the battery pack
State the electric quantity balancing between battery pack.
Fig. 6 is referred to, the driving circuit 100 further includes three-phase motor 30, the three-phase in one of the embodiments,
Each phase bus of motor 30 connects the output end of a bridge arm；The three-phase motor 30 and second detection circuit 60
Electrical connection.First bridge arm 21 is set as the first work bridge arm.One in second bridge arm 22 and the third bridge arm 23
A bridge arm is set as the second work bridge arm.Another bridge arm in second bridge arm 22 and the third bridge arm 23 remains open
State.In an alternative embodiment, the selection of the second work bridge arm determines that selection is connected to according to the rotor-position of motor
The bridge arm of the ac bus close from rotor orientation position is as the second work bridge arm.It is such to select in the process heated for battery pack
In, the motion amplitude of rotor is smaller, the possibility of wheel movement when reducing parking heating.
The S20 is controlled after confirming that the electric car needs to carry out battery heating by first controller 50
The inverter circuit 20, so that first battery pack 11 includes: the step of charging to second battery pack 12
S21 controls the upper bridge arm and second service bridge of the first work bridge arm by first controller 50
The lower bridge arm of arm is connected, so that first battery pack 11 charges to the three-phase motor 30.
In step S21, the forward current of the three-phase motor 30 is increased, and as shown in Figure 8, electric current can be from position 0
Rise to position 1.Curent change process meets following formula in step S21:
Wherein, E1For the first sub- battery open circuit voltage.R1For the first battery pack internal resistance.L is driving motor in heating process
Working inductance, RLFor the loop resistance in heating process.
Whether S22 detects the current amplitude in the three-phase motor 30 by second detection circuit 60 and is greater than or waits
In target heated current upper threshold value.In step S22, the target heated current upper threshold value can performance according to battery, inversion
The flow-resistant capacity of switching power devices 211 in circuit 20 determines.
S23, when the current amplitude in the three-phase motor 30 is more than or equal to target heated current upper threshold value, by described
The lower bridge arm that first controller 50 controls the second work bridge arm disconnects, and the upper bridge arm for controlling the second work bridge arm is led
It is logical, so that first battery pack 11 and the three-phase motor 30 charge to second battery pack 12.
In step S23, first battery pack 11 and the three-phase motor 30 discharge, and second battery pack 12 charges.
The forward current of the electricity three-phase motor 30 reduces.As shown in figure 8, electric current drops to position 2 from position 1.Electric current in step S23
Change procedure meets following formula:
Wherein, E2For the second sub- battery open circuit voltage.R2For the second battery pack internal resistance.
The S23 passes through when the current amplitude in the three-phase motor 30 is more than or equal to target heated current upper threshold value
The lower bridge arm that first controller 50 controls the second work bridge arm disconnects, and controls the upper bridge of the second work bridge arm
Arm conducting, so as to be wrapped after the step of first battery pack 11 and the three-phase motor 30 charge to second battery pack 12
It includes:
Detect whether the current amplitude in the three-phase motor 30 is less than or equal to target by second detection circuit 60
Heated current lower threshold value.When the current amplitude in the three-phase motor 30 is less than or equal to target heated current lower threshold value, repeat
Step S21-S23, until first battery pack 11 reaches first time threshold to 12 charging time of the second battery pack.Such as
Shown in Fig. 8, electric current is run from position 3 to position 3T+。
In the present embodiment, the switch state of three bridge arms by controlling the inverter circuit 20 may be implemented described the
One battery pack 11 charges to the three-phase motor 30 first, secondly, first battery pack 11 and the three-phase motor 30 are together
The process to charge to second battery pack 12.In this course, it removes outside necessary electric quantity consumption, the method reaches
The purpose that first battery pack 11 charges to second battery pack 12.
Fig. 7 is referred to, in one of the embodiments, the S30, when first battery pack 11 is to second battery
After 12 charging time of group reach first time threshold, the inverter circuit 20 is controlled by first controller 50, so that institute
It states the second battery pack 12 to charge to first battery pack 11, said supply unit 10 itself occurs during charging and discharging
Polarization, so that the step of realizing the controllable heating of each battery pack in said supply unit 10 includes:
S31, by first controller 50 control it is described first work bridge arm lower bridge arm and second service bridge
The upper bridge arm of arm is connected, so that second battery pack 12 charges to the three-phase motor 30.
In step S31, the forward current of the three-phase motor 30 drops to zero, forms the subsequent height of continuing rising of negative current.Such as
Shown in Fig. 8, electric current can be from position 3T+It runs to position 4.Curent change process meets following formula in step S31:
Wherein, E1For the first sub- battery open circuit voltage.R1For the first battery pack internal resistance.L is driving motor in heating process
Working inductance, RLFor the loop resistance in heating process.
S32 detects whether the current amplitude in the three-phase motor 30 is more than or equal to by second detection circuit 60
Target heated current upper threshold value.In step S32, the target heated current upper threshold value can be electric according to the performance of battery, inversion
The flow-resistant capacity of switching power devices 211 in road 20 determines.
S33, when the current amplitude in the three-phase motor 30 is more than or equal to target heated current upper threshold value, by described
The lower bridge arm that first controller 50 controls the first work bridge arm disconnects, and the upper bridge arm for controlling the first work bridge arm is led
It is logical, so that second battery pack 12 and the three-phase motor 30 charge to first battery pack 11.
In step S33, second battery pack 12 and the three-phase motor 30 discharge, and first battery pack 11 charges.
The negative current of the electricity three-phase motor 30 reduces.As shown in figure 8, electric current is run from position 4 to position 5.Electric current in step S33
Change procedure meets following formula:
Wherein, E2For the second sub- battery open circuit voltage.R2For the second battery pack internal resistance.
The S33 passes through when the current amplitude in the three-phase motor 30 is more than or equal to target heated current upper threshold value
The lower bridge arm that first controller 50 controls the first work bridge arm disconnects, and controls the upper bridge of the first work bridge arm
Arm conducting, so as to be wrapped after the step of second battery pack 12 and the three-phase motor 30 charge to first battery pack 11
It includes:
Detect whether the current amplitude in the three-phase motor 30 is less than or equal to target by second detection circuit 60
Heated current lower threshold value.When the current amplitude in the three-phase motor 30 is less than or equal to target heated current lower threshold value, repeat
Step S31-S33, until second battery pack 12 reaches second time threshold to 11 charging time of the first battery pack.
When the current amplitude when in the three-phase motor 30 is less than or equal to target heated current lower threshold value, step is repeated
S31-S33, until the step of second battery pack 12 reaches second time threshold to 11 charging time of the first battery pack
Later further include:
Whether it is less than drive threshold temperature by the battery core temperature that the battery management circuit 40 detects said supply unit 10
Degree.When the battery core temperature is less than the drive threshold temperature, step S10-S30 is repeated, until the battery core temperature is greater than
Equal to the drive threshold temperature or receive heating halt instruction.
In the present embodiment, the switch state of three bridge arms by controlling the inverter circuit 20 may be implemented described the
Two battery packs 12 charge to the three-phase motor 30 first.Secondly, second battery pack 12 and the three-phase motor 30 are together
The process to charge to first battery pack 11.In this course, it removes outside necessary electric quantity consumption, the method reaches
The purpose to charge for second battery pack 12 to first battery pack 11.
The S10 in one of the embodiments, passes through the battery management circuit 40 before the electric car starting
Judge whether the electric car needs the step of carrying out battery heating to include:
Whether it is less than drive threshold temperature by the battery core temperature that the battery management circuit 40 detects said supply unit 10
Degree.When the battery core temperature is less than the drive threshold temperature, then confirm that the electric car needs to carry out battery heating.When
When the battery core temperature is more than or equal to the drive threshold temperature, the electric car normally starts.
In the present embodiment, by the size relation for detecting the battery core temperature and drive threshold temperature, it can be determined that go out institute
State whether electric car needs to carry out Low-temp. electrothermal.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (13)
1. a kind of driving circuit (100) characterized by comprising
Power supply unit (10), including the first battery pack (11) and the second battery pack (12)；And
Inverter circuit (20), including the first bridge arm (21), the second bridge arm (22) and third bridge arm (23)；
The first electrode of first battery pack (11) is connect with the upper bridge arm of first bridge arm (21) by the first bus, institute
State the first electrode of the second battery pack (12) respectively with the upper bridge arm of second bridge arm (22) and the third bridge arm (23)
Upper bridge arm is connected by the second bus；
The second electrode of first battery pack (11) and the second electrode of second battery pack (12) are collinearly to form first
It holds (101)；
The lower bridge of the lower bridge arm of first bridge arm (21), the lower bridge arm of second bridge arm (22) and the third bridge arm (23)
Arm is collinearly to form second end (201)；
The first end (101) connect with the second end (201) bus.
2. driving circuit (100) according to claim 1, which is characterized in that further include:
State switch (140) is set between first bus and second bus.
3. driving circuit (100) according to claim 1, which is characterized in that each battery pack includes:
Multiple battery cores (111), the quantity and second battery pack of the battery core (111) in first battery pack (11)
(12) battery core (111) quantity in is identical；
The connection type of the battery core (111) in first battery pack (11) with it is described in second battery pack (12)
The connection type of battery core (111) is identical.
4. driving circuit (100) according to claim 3, which is characterized in that the connection type of the battery core (111) is more
Series connection, multiple battery core (111) parallel connections or multiple institutes after a battery core (111) series connection, multiple battery cores (111) are in parallel
State one of parallel connection after battery core (111) connect.
5. driving circuit (100) according to claim 1, which is characterized in that further include:
Second by-pass switch (130) is electrically connected between the first end (101) and the second end (201).
6. a kind of drive system of electric automobile (200) characterized by comprising
Driving circuit (100) of any of claims 1-5；
Battery management circuit (40) is electrically connected with the driving circuit (100)；
First controller (50) is electrically connected with the driving circuit (100)；And
Second detection circuit (60) is electrically connected with first controller (50).
7. a kind of batteries of electric automobile heating means, which is characterized in that realize the electricity using drive system of electric automobile (200)
Electrical automobile battery heating means；
The electricity that the drive system of electric automobile (200) includes driving circuit (100), is electrically connected with the driving circuit (100)
Pond management circuit (40) and the first controller (50) being electrically connected with the driving circuit (100)；
The driving circuit (100) includes the power supply unit (10) and inverter circuit (20) connected by bus, and the power supply is single
First (10) include the first battery pack (11) and the second battery pack (12)；The inverter circuit (20) includes three bridge arms；Described
The first electrode of one battery pack (11) is connect with the upper bridge arm of a bridge arm in three bridge arms by the first bus, and described
The first electrode of two battery packs (12) passes through the second bus with the upper bridge arm of remaining two bridge arms in three bridge arms respectively
Connection；
After the second electrode of first battery pack (11) and the second electrode of second battery pack (12) are conllinear, with described three
The lower bridge arm bus of a bridge arm connects；
The batteries of electric automobile heating means include:
S10, before electric car starting, by the battery management circuit (40) judge the electric car whether need into
The heating of row battery；
S20 is controlled described inverse after confirming that the electric car needs to carry out battery heating by first controller (50)
Power transformation road (20), so that first battery pack (11) the second battery pack of Xiang Suoshu (12) charges；
S30 leads to after reaching first time threshold in the first battery pack (11) Xiang Suoshu the second battery pack (12) charging time
It crosses first controller (50) and controls the inverter circuit (20), so that second battery pack (12) first battery of Xiang Suoshu
Group (11) charging, said supply unit (10) itself polarize during charging and discharging, to realize that the power supply is single
The controllable heating of each battery pack in first (10).
8. battery heating means according to claim 7, which is characterized in that the drive system of electric automobile (200) is also
Including the second detection circuit (60) being electrically connected with first controller (50), the driving circuit (100) further includes three-phase
Motor (30), the three-phase motor (30) connect with the inverter circuit (20) bus；The three-phase motor (30) also with it is described
Second detection circuit (60) electrical connection；The inverter circuit (20) includes the first bridge arm (21), the second bridge arm (22) and third bridge
The upper bridge arm of arm (23), the first electrode of first battery pack (11) and first bridge arm (21) is connected by the first bus
Connect, the first electrode of second battery pack (12) respectively with the upper bridge arm and the third bridge arm of second bridge arm (22)
(23) upper bridge arm is connected by the second bus；
First bridge arm (21) is set as the first work bridge arm；In second bridge arm (22) and the third bridge arm (23)
One bridge arm is set as the second work bridge arm, another bridge arm in second bridge arm (22) and the third bridge arm (23) is protected
Hold off-state；
The S20 controls institute by first controller (50) after confirming that the electric car needs to carry out battery heating
Inverter circuit (20) are stated, so that first battery pack (11) the second battery pack of Xiang Suoshu (12) includes: the step of charging
S21 controls the upper bridge arm and the second work bridge arm of the first work bridge arm by first controller (50)
Lower bridge arm conducting so that first battery pack (11) Xiang Suoshu three-phase motor (30) charge；
Whether S22 is greater than or is waited by the current amplitude in second detection circuit (60) the detection three-phase motor (30)
In target heated current upper threshold value；
S23 passes through described the when the current amplitude in the three-phase motor (30) is more than or equal to target heated current upper threshold value
The lower bridge arm of one controller (50) control the second work bridge arm disconnects, and the upper bridge arm for controlling the second work bridge arm is led
It is logical, so that first battery pack (11) and the three-phase motor (30) the second battery pack of Xiang Suoshu (12) charging.
9. battery heating means according to claim 8, which is characterized in that the S23, when in the three-phase motor (30)
Current amplitude be more than or equal to target heated current upper threshold value when, pass through first controller (50) control it is described second work
The lower bridge arm of bridge arm disconnects, and controls the upper bridge arm conducting of the second work bridge arm so that first battery pack (11) and
Include: after the step of three-phase motor (30) second battery pack of Xiang Suoshu (12) is charged
Detect whether the current amplitude in the three-phase motor (30) is less than or equal to target by second detection circuit (60)
Heated current lower threshold value；
When the current amplitude in the three-phase motor (30) is less than or equal to target heated current lower threshold value, step S21- is repeated
S23, until the first battery pack (11) Xiang Suoshu the second battery pack (12) charging time reaches first time threshold.
10. battery heating means according to claim 9, which is characterized in that the S30, when first battery pack
(11) after the second battery pack of Xiang Suoshu (12) charging time reaches first time threshold, pass through first controller (50) and control
The inverter circuit (20), so that second battery pack (12) the first battery pack of Xiang Suoshu (11) charges, said supply unit
(10) it itself polarizes during charging and discharging, to realize the controllable of each battery pack in said supply unit (10)
The step of heating includes:
S31, lower bridge arm and the second work bridge arm by first controller (50) control the first work bridge arm
Upper bridge arm conducting so that second battery pack (12) Xiang Suoshu three-phase motor (30) charge；
S32 detects whether the current amplitude in the three-phase motor (30) is more than or equal to by second detection circuit (60)
Target heated current upper threshold value；
S33 passes through described the when the current amplitude in the three-phase motor (30) is more than or equal to target heated current upper threshold value
The lower bridge arm of one controller (50) control the first work bridge arm disconnects, and the upper bridge arm for controlling the first work bridge arm is led
It is logical, so that second battery pack (12) and the three-phase motor (30) the first battery pack of Xiang Suoshu (11) charging.
11. battery heating means according to claim 10, which is characterized in that the S33, when the three-phase motor (30)
In current amplitude when being more than or equal to target heated current upper threshold value, pass through first controller (50) and control first work
The lower bridge arm for making bridge arm disconnects, and controls the upper bridge arm conducting of the first work bridge arm, so that second battery pack (12)
Include: later with the step of three-phase motor (30) the first battery pack of Xiang Suoshu (11) charging
Detect whether the current amplitude in the three-phase motor (30) is less than or equal to target by second detection circuit (60)
Heated current lower threshold value；
When the current amplitude in the three-phase motor (30) is less than or equal to target heated current lower threshold value, step S31- is repeated
S33, until the second battery pack (12) Xiang Suoshu the first battery pack (11) charging time reaches second time threshold.
12. battery heating means according to claim 11, which is characterized in that described when in the three-phase motor (30)
Current amplitude be less than or equal to target heated current lower threshold value when, repeat step S31-S33, until second battery pack (12) to
After the step of first battery pack (11) charging time reaches second time threshold further include:
Whether it is less than drive threshold temperature by the battery core temperature of the battery management circuit (40) detection said supply unit (10)
Degree；
When the battery core temperature is less than the drive threshold temperature, step S10-S30 is repeated, until the battery core temperature is greater than
Equal to the drive threshold temperature or receive heating halt instruction.
13. the battery heating means according to any one of claim 7-12, which is characterized in that the S10, it is described electronic
Before automobile starting, judge whether the electric car needs the step of carrying out battery heating by the battery management circuit (40)
Include:
Whether it is less than drive threshold temperature by the battery core temperature of the battery management circuit (40) detection said supply unit (10)
Degree；
When the battery core temperature is less than the drive threshold temperature, then confirm that the electric car needs to carry out battery heating.
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| WO2023207395A1 (en) * | 2022-04-28 | 2023-11-02 | 比亚迪股份有限公司 | Heating system for heating power battery, and electric vehicle |
| WO2023207483A1 (en) * | 2022-04-29 | 2023-11-02 | 比亚迪股份有限公司 | Battery self-heating control method and system, and electric vehicle |
| WO2023226561A1 (en) * | 2022-05-27 | 2023-11-30 | 宁德时代新能源科技股份有限公司 | Power battery system, battery control method and apparatus, device, and storage medium |
| CN115378066A (en) * | 2022-06-06 | 2022-11-22 | 宁德时代新能源科技股份有限公司 | Battery pack voltage balancing method and device, electronic equipment and storage medium |
| WO2024046163A1 (en) * | 2022-08-31 | 2024-03-07 | 比亚迪股份有限公司 | Battery heating device and vehicle |
| CN115621620A (en) * | 2022-10-17 | 2023-01-17 | 深圳博浩远科技有限公司 | Battery self-heating method and device, electronic equipment and storage medium |
| WO2024087398A1 (en) * | 2022-10-26 | 2024-05-02 | 广汽埃安新能源汽车股份有限公司 | Transformer-based battery heating circuit, and electric vehicle |
| CN116061765A (en) * | 2023-04-06 | 2023-05-05 | 江苏速豹动力科技有限公司 | Battery heating system and electric truck |
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