CN104302506B - Motor vehicle with high voltage supply system - Google Patents

Motor vehicle with high voltage supply system Download PDF

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Publication number
CN104302506B
CN104302506B CN201380022207.2A CN201380022207A CN104302506B CN 104302506 B CN104302506 B CN 104302506B CN 201380022207 A CN201380022207 A CN 201380022207A CN 104302506 B CN104302506 B CN 104302506B
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China
Prior art keywords
high voltage
motor vehicle
power supply
voltage power
intermediate circuit
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CN201380022207.2A
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Chinese (zh)
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CN104302506A (en
Inventor
H·斯塔特斯
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Audi AG
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Audi AG
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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
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B60L7/14—Dynamic electric regenerative braking for vehicles propelled by ac motors
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/22—Balancing the charge of battery modules
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/12—Buck converters
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/14—Boost converters
    • 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
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • 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
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • 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
    • B60L2260/00—Operating Modes
    • B60L2260/20—Drive modes; Transition between modes
    • B60L2260/28—Four wheel or all wheel drive
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Abstract

The present invention relates to a kind of motor vehicle (10), with the first high voltage supply system (12), first high voltage supply system include the first high voltage power supply (16), the first intermediate circuit (18) for being connected with first high voltage power supply and at least one be connected to high pressure customer (24,26) on the first intermediate circuit (18).According to the present invention provided with additional the second high voltage supply system (14), second high voltage supply system include the second high voltage power supply (28), the second intermediate circuit (30) being connected with second high voltage power supply and at least one be connected to high pressure customer (36) on the second intermediate circuit (30).

Description

Motor vehicle with high voltage supply system
Technical field
The present invention relates to a kind of motor vehicle, with high voltage supply system, the high voltage supply system includes high voltage power supply --- Such as electrokinetic cell, the intermediate circuit being connected with the high voltage power supply and at least one be connected between high pressure power consumption on circuit Device --- for example electronic motor.Related to the present invention, concept " high pressure " is interpreted as being higher than 60 volts, is especially more than 200V voltage.
Background technology
By means of two or more high voltage power supplies in this high voltage supply system it is to be expected that in intermediate circuit Electric energy is provided.For example, when two or more electrokinetic cells supply to hold in use, bigger electrical power storage can be provided in a motor vehicle Amount.Electrokinetic cell can also be provided as battery and high as second there is provided fuel cell pack as the first high voltage power supply Voltage source.Electric energy from operation fuel, such as hydrogen can be provided by fuel cell pack.
But be problematic when two high voltage power supplies are run on an intermediate circuit：If not taking other arrange Apply, then two power supplys must provide identical voltage exactly on intermediate circuit.Otherwise by intermediate circuit in two power supplys Between flow is undesirable balanced balanced current.
To this by the A1 of DE 10 2,008 047 502, it is known that intermediate circuit is electrically connected by the first transformer with the first power supply Connect, and electrically connected by the second transformer with second source.Thus it can be monitored in each power supply with using two transformers Between can flow between circuit.But the defect when coupling power supply by transformer is, each transformer be able to must be transmitted relatively Larger rated power, for the electric energy from each power supply can also to be for example fed to the motor of motor vehicle, Huo Zheke It is stored into so that the regenerative current of motor is returned in power supply.When motor is transported during regenerating with generator operation pattern It is situation described later during row.
To this by the A1 of DE 10 2,005 042 654, it is known that directly running the first optimal storage of power on intermediate circuit Energy device, and only the second optimal accumulator of electric energy is coupled by transformer with intermediate circuit.Thus in high voltage supply system only Need only one transformer.But must also always be designed for can be from the second optimal accumulator of electric energy for this transformer Enough electrical power are transmitted to motor.
A kind of device for being used to distribute electric energy in a motor vehicle, shown machine described in the A1 of DE 10 2,009 018 011 Motor-car has at least one motor.The motor is temporarily, at least conductively connected by inverter with high-voltage fence, wherein, it is high pressure Power network is assigned with the first electrokinetic cell.Second electrokinetic cell can be conductively connected with high-voltage fence by transformer.Utilize change Depressor can supply motor in the case of a hundred per cent load of the second electrokinetic cell, until the hundred of the first electrokinetic cell / zero load.Second electrokinetic cell and transformer are the special equipments of motor vehicle, wherein, the second electrokinetic cell and transformer are excellent Choosing is combined into only one mechanical module, and higher total capacity is provided electronic motor for making using the mechanical module With thus obtaining bigger continual mileage.
The content of the invention
It is an object of the present invention to provide a kind of high voltage supply system that can be manufactured in an advantageous manner for motor vehicle System.
The purpose according to the motor vehicle of the present invention by being achieved, and the motor vehicle has the first high voltage supply system, should First high voltage supply system include the first high voltage power supply, the first intermediate circuit for being connected with first high voltage power supply and at least one The first high pressure customer on the first intermediate circuit is connected to, the motor vehicle also has the second additional high voltage supply system, should Second high voltage supply system includes the second high voltage power supply and the second intermediate circuit being connected with second high voltage power supply, described second There is high voltage supply system at least one to be connected to the second high pressure customer on the second intermediate circuit, wherein, electricity in the middle of two Road forms two separated intermediate circuits, by described two separated intermediate circuits, and one of high voltage power supply is respectively Only powered for some high pressure customers in the high pressure customer of motor vehicle.
Also there is the second additional high pressure in addition to the first above-mentioned high voltage supply system according to the motor vehicle of the present invention Electric power system.The second centre electricity that second high voltage supply system includes the second high voltage power supply, is connected with second high voltage power supply Road is connected to the high pressure customer on the second intermediate circuit with least one.In other words, have two according to the motor vehicle of the present invention Individual separated intermediate circuit, by described two separated intermediate circuits, one of high voltage power supply is respectively only to be motor-driven Some high pressure customers in the high pressure customer of car are powered.Here, intermediate circuit includes the arrangement knot being made up of high-voltage conducting wires Structure, these high-voltage conducting wires are designed for being transmitted to high pressure customer from high voltage power supply by supply current, or occur from high pressure Regenerative current is transmitted to high voltage power supply by device.Herein, the electric lead of intermediate circuit be preferably designed to be used for conduct more than 10A, Especially more than the electric current of 30A current strength.
Advantage according to the motor vehicle of the present invention is can to provide two high voltage power supplies to be powered to high pressure customer, Without providing measure bothersome, for blocking the balanced balanced current between two high voltage power supplies.This, which can be realized, is not abandoning Motor vehicle is still advantageously manufactured in the case of two high voltage power supplies.
It is preferred here that, at least the first high voltage power supply and the first intermediate circuit directly --- that is do not having In the case of DC-DC converter (DC- direct currents) --- couple.Advantage thus achieved is that, herein can also use cost have The electric connection of profit, such as simply, for the positive pole and negative pole of electrokinetic cell to be connected on each conductor of intermediate circuit Terminal-connecting element.Second high voltage power supply also preferably directly becomes in no DC-DC in an identical manner with the second intermediate circuit Coupled in the case of parallel operation.
In the preferred embodiment according to the motor vehicle of the present invention, first and second intermediate circuit is become by DC-DC Parallel operation is mutually coupled.Advantage thus achieved is that, the charged shape of two high voltage power supplies can be balanced by this DC-DC converter Difference in state.But herein unlike the prior art, without making DC-DC converter can also to guide supply current Or regenerative current.If it is sufficient that DC-DC converter can transmit balanced balanced current according to the rules, the electric current of the balanced balanced current Intensity is significantly less than the common current strength of high pressure customer supply current.Herein, balanced balanced current is especially referred to, electric current Intensity is less than the 50% of the electronic running driving device rated power supply electric current of motor vehicle, especially less than 20A.
Correspondingly according to the improvement project of the motor vehicle, the control device of the DC-DC converter is designed for making The state-of-charge of two high voltage power supplies is mutually balanced.
Here, another improvement project of the motor vehicle correspondingly provides that the rated power of the DC-DC converter is only set Count into for balancing state-of-charge.In other words, can be from balanced balanced current of the DC-DC converter according to design requirement non-persistent transmission It is less than what is flowed according to the rules by each intermediate circuit between its high voltage power supply and its high pressure customer in terms of current strength Supply current or regenerative current.Only for balance state-of-charge design DC-DC converter --- namely power is relatively low Converter --- it is more with low cost much than required in the prior art converter.Another advantage of the converter is, its Less than the DC-DC converter being also designed to for transmitting above-mentioned supply current or regenerative current.
In the embodiment according to the motor vehicle of the present invention, the DC-DC converter is designed for bidirectionally transmitting energy Amount.Advantage thus achieved is that, the difference of energy consumption that can extremely flexibly for high pressure customer on two intermediate circuits Make a response.The state-of-charge of high voltage power supply can always be balanced by DC-DC converter.
According to another embodiment of the motor vehicle of the present invention, it is provided with the only one intermediate circuit in two intermediate circuits Joint for connecting high voltage power supply charger.This makes the manufacture more cost advantages of the motor vehicle.Do not connect here, being located at Charging current in the intermediate circuit of head, for electrokinetic cell can be guided by DC-DC converter without any problems.This DC-DC converter can suppress charging current, DC-DC converter is transmitted electric current between two intermediate circuits, and same Shi Buhui is overheated.
If at least providing inner lead in the first high voltage power supply, another advantage is obtained.Pass through this inner lead Itself accumulator of the DC-DC converter and the first high voltage power supply can be made, namely for example electrically connected with its galvanic cell, and Wire without the first intermediate circuit to DC-DC converter.The intermediate circuit wire can be constituted with shorter, this also make according to The motor vehicle of the present invention saves cost.Because need to only transmit described balanced balanced current, the conductive wire cross-section of inner lead can To be significantly less than the conductive wire cross-section of intermediate circuit wire.Preferably, the first high voltage power supply has connecing for DC-DC converter Head and be connected to the joint on the opposed side of its housing for intermediate circuit.It can will be used for DC-DC from there through inner lead The joint of converter is connected with the joint for intermediate circuit.It can certainly provide, the second high voltage power supply is in an identical manner Constitute and be connected with DC-DC converter.
According to one embodiment regulation of the motor vehicle of the present invention, one of high voltage supply system is arranged on before motor vehicle Portion, another high voltage supply system is arranged on the rear portion of motor vehicle.Thus, it is possible in the situation using high-tension cable as few as possible High pressure-intermediate circuitry of the lower whole motor vehicle of manufacture.Here, the first intermediate circuit and the second intermediate circuit pass through DC-DC The overlap joint of converter can have than intermediate circuit smaller conductive wire cross-section in itself.
If the motor vehicle has two electronic motors, by high voltage electric equipment distribution in two middle electricity It is particularly advantageous in road.Thus, the motor in described two motors is connected in the middle of first by inverter On circuit, another motor is connected on the second intermediate circuit by inverter.Thus allow two motors mutual Driven independently by each high voltage power supply of its each intermediate circuit, this causes motor vehicle to be ultra-safe for failure.
High voltage power supply especially electrokinetic cell described in related to the motor vehicle according to the present invention.
Brief description of the drawings
By means of specific embodiment, the present invention will be described in more detail again below.Therefore, accompanying drawing show by According to the block diagram of the high pressure intermediate circuitry of the preferred embodiment of the motor vehicle of the present invention.
Below in illustrated example, described automotive component represents the independent of separate observation of the invention respectively Feature, they also improve of the invention and thus also independent or are considered as the present invention in combination with further feature independently of each other respectively Part.In addition the embodiment can also by it is other it is stated that feature of present invention supplemented.
Embodiment
Figure 1 illustrates the high voltage electric equipment of motor vehicle 10.Motor vehicle 10 for example can be passenger car.In motor vehicle 10 In high voltage supply system 12 is installed in front portion and high voltage supply system 14 is installed at rear portion.Here, high voltage supply system Refer respectively to the whole electrical equipment being made up of power supply, customer and connecting wire.
There is high voltage supply system 12 above high voltage power supply 16, intermediate circuit 18 (to have the wire 20 for positive potential With the wire 22 for negative potential) and multiple electric high voltage devices, wherein illustrating in greater detail electronic traveling in the accompanying drawings Drive device 24.Other electric high voltage devices 26 are represented with unique square frame in the accompanying drawings.
High voltage supply system 14 below includes high voltage power supply 28, intermediate circuit 30 in a similar way, and (having is used for just The wire 32 of current potential and the wire 34 for negative potential) and it is connected between electric high voltage device on circuit 30, wherein Electronic drive device 36 is illustrated in greater detail in accompanying drawing.Represented in the accompanying drawings with unique square frame and other be connected between circuit Electric high voltage device 38 on 30.
High voltage power supply 16,28 for example can be electrokinetic cell or fuel cell pack respectively.Produced by high voltage power supply 16,28 Voltage U1, U2 for example can be 400V DC voltages.
Electronic running driving device 24 can include inverter 40 and motor 42.Thus will be in wire using inverter 40 The DC voltage U1 of intermediate circuit 18 produced between 20 and 22 by high voltage power supply 16 is converted into the three-phase alternating current confession for motor 42 Three-phase L1, L2, L3 or U, V, W of electricity.In other words, by inverter 40 can by by motor 42 regeneration operation in, for example exist The alternating voltage produced during braking procedure in three-phase L1, L2, L3 is converted into DC voltage, then can be by the DC voltage It is stored in intermediate circuit 18.Remaining electric high voltage device 26 for example can be 12V-DC-DC converters, and it is vehicle-mounted in 12V The supply voltage from the DC voltage U1 of intermediate circuit 18 is produced in power network.12V-DC-DC converters are relevant to intermediate circuit 18 Worked as high pressure customer.
When the high voltage device 26 of electronic running driving device 24 and/or electricity is run, electric current I1 is in intermediate circuit 18 Flowing.
Running driving device 36 below can equally include inverter 44 and the motor 46 by this invertor operation.By This DC voltage U2 of intermediate circuit 30 produced using inverter 44 between the wire 32 and 34 of high voltage power supply 28 is intersected with three Flow voltage L1, L2, L3 or U, changed between V, W, be that motor 46 is powered by the three-phase alternating voltage.
Other electric high voltage devices 38 for example can also be joint, by the joint can be connected to high voltage power supply 16 or 28 charger.This is applied to the situation that high voltage power supply 16 or 28 is battery, namely such as electrokinetic cell.
When motor vehicle 10 is run, electric current I2 is in intermediate circuit 30 in high voltage power supply 28 and the high voltage device 36,38 of electricity Between flow.
Can also be provided for motor vehicle 10, the motor vehicle only have an electronic running driving device, for example before Electric running drive device 24 or electric running drive device 36 below.
During motor vehicle 10 is run, high voltage power supply 16,28 is in this example due in electric power system 12 above The different capacity demand of high voltage device 24,26 and the high voltage device 36,38 of electric power system 14 below and bear different loads. By the different running statuses drawn or state-of-charge of high voltage power supply 16,28, the high voltage power supply is in intermediate circuit 18,30 Produce magnitude of voltage DC voltage U1 or U2 different from each other.
High voltage supply system 12 above and high voltage supply system below 14 are mutually coupled by DC-DC converter 46. DC-DC converter 46 can be itself by equipment known in the art.In the examples illustrated in the figures, DC-DC converter 46 On the one hand it is connected with the joint A1 behind high voltage power supply 16.DC-DC converter 46 and high-tension electricity are made by joint A1 below Joint A2 connections before source 16.Joint A2 above directly, for example can be connected to by corresponding terminal-connecting element On the wire 20,22 of intermediate circuit 18.Joint A2 above and joint A1 below by the inner lead 48 of high voltage power supply 16, 50 electrical connections.Therefore generally intermediate circuit 18 extends to each electric high voltage device 24,26 from DC-DC converter 46. This is symbolically represented by the extension line zk1 of intermediate circuit 18 in the accompanying drawings.
DC-DC converter 46 is connected on the joint A3 behind high voltage power supply 28 by its another output end.After described The joint A3 in face is electrically connected by the inner lead 52,54 of high voltage power supply 28 with joint A4 above.Joint A4 above can be with Directly, for example electrically connected by wire 32 or 34 by terminal-connecting element.Thus, intermediate circuit 30 extends to DC-DC Converter 46, this is symbolically represented by extension line zk2 in the accompanying drawings.
Inner lead 48 to 54 and the conductive wire cross-section for making the wire that DC-DC converter 46 is connected with high voltage power supply 16,28 Each conductive wire cross-section of wire 20,22,32,34 is considerably smaller than respectively.The conductive wire cross-section of inner lead 48 to 54 is also distinguished Considerably smaller than each conductive wire cross-section of wire 20,22,32,34.
DC-DC converter 46 can be designed for bidirectionally transmitting electric energy between two high voltage supply systems 12,14. One balanced balanced current I is only exported from (unshowned) control device of DC-DC converter 46 by DC-DC converter 46.Pass through Balanced balanced current I only causes the difference between intermediate circuit voltage U1 and U2 to be balanced.If high voltage power supply 16 is, for example, dynamic Power battery and this electrokinetic cell generation DC voltage U1, the DC voltage are less than the DC voltage produced by high voltage power supply 28 U2, therefore, voltage difference is identified by the control device of DC-DC converter 46 by voltage measuring apparatus, and correspondingly from height The pressure guiding of electric power system 14 balanced balanced current I makes electrokinetic cell (high voltage power supply 16) fill again into high voltage supply system 12, thus Electricity, makes DC voltage U1 and U2 magnitude of voltage balance each other.
But can not make supply current I1 by means of DC-DC converter 46 for the operation of electronic running driving device 24 And it is transferred to the running driving device from electric power system 14.The rated power of DC-DC converter 46 is too small.It is for this situation It is especially small.In addition above-mentioned converter is than can also transmit the DC-DC converter more cost advantages of supply current.
In motor vehicle 10, wire 20,22,32,34 need have so big conductive wire cross-section, make supply current I1 from High voltage power supply 16 directs into high voltage device 24,26, or make supply current I2 from high voltage power supply 28 direct into high voltage device 36, 38.By making high voltage power supply 16 be aligned forward and by thinner inner lead in motor vehicle 10 with the joint A2 before it 48th, 50 the connection that intermediate circuit wire 20,22 arrives DC-DC converter 46 is provided, wire 20,22 can be especially short.Correspondingly, lead to The joint A4 crossed before high voltage power supply 28 can equally make wire 32,34 special back to the arrangement of wire 32,34 Constitute shortly.The abnormal cost of motor vehicle 10 can generally advantageously manufactured, because there was only short distance in motor vehicle 10 Need to provide the wire 20,22,32,34 of larger conductive wire cross-section.
In a word, represented by example, how to make power battery device by two electrokinetic cells 16,28 in space On be divided into two parts, and in the condition of the high-tension cable 20,22,32,34 using big conductive wire cross-section as less as possible Under, the high pressure intermediate circuitry for whole motor vehicle can be completed.This is additionally using small-power and thus small structure DC-DC converter 46 under conditions of realize.By the way that high voltage power supply 16,28 is distributed before motor vehicle 10 in motor vehicle 10 Portion and rear portion, and at any time without whole power for running driving device 24 or 36 are passed through into whole motor vehicle 10 guidings.Can be separated from each other two intermediate circuits 18,30 by disconnecting DC-DC converter 46.Intermediate circuit 18,30 it Therefore electric fault in one does not interfere with another intermediate circuit, therefore the high voltage device being at least connected with another intermediate circuit It can continue to run with.Thus it is also ultra-safe for failure to make motor vehicle.Can by the decoupling of two intermediate circuits 18,30 Energy property improves the security of occupant in the case of for example can also occurring short circuit in collision.

Claims (13)

1. a kind of motor vehicle (10), with the first high voltage supply system (12), first high voltage supply system includes the first high pressure Power supply (16), the first intermediate circuit (18) being connected with first high voltage power supply and at least one be connected to the first intermediate circuit (18) the first high pressure customer (24,26) on, the motor vehicle also has additional the second high voltage supply system (14), and this second High voltage supply system includes the second high voltage power supply (28) and the second intermediate circuit (30) being connected with second high voltage power supply,
Characterized in that,
Second high voltage supply system (14) has the second high pressure consumption that at least one is connected on the second intermediate circuit (30) Electrical equipment (36), wherein, two intermediate circuits (18,30) form two separated intermediate circuits (18,30), pass through described two Individual separated intermediate circuit, one of high voltage power supply (16,28) is only high for some in the high pressure customer of motor vehicle respectively Pressure customer is powered.
2. motor vehicle (10) according to claim 1, wherein, first high voltage power supply (16) and the first intermediate circuit (18) directly coupled in the case of no DC-DC converter.
3. motor vehicle (10) according to claim 1 or 2, wherein, first high voltage supply system (12) and second high Pressure electric power system (14) is mutually coupled by DC-DC converter (46).
4. motor vehicle (10) according to claim 3, wherein, the control device of the DC-DC converter (46) is designed to For making the state-of-charge of two high voltage power supplies (16,28) mutually balance.
5. motor vehicle (10) according to claim 4, wherein, the rated power of the DC-DC converter (46) is only designed Into for balancing state-of-charge, wherein, treat that the balanced balanced current (I) transmitted from DC-DC converter (46) is less than according to rule for this Surely by the way that each intermediate circuit (18,30) is in the high voltage power supply (16,28) being connected between on circuit and is connected between on circuit The first high pressure customer (24,26) and at least one the second high pressure customer (36) between the electric current (I1, I2) that flows, its In, the electric current (I1, I2) be treat from high voltage power supply (16,28) by the high-voltage conducting wires of each intermediate circuit (18,30) (20,22, 32nd, the supply electric current (I1, I2) of the first high pressure customer (24) and the second high pressure customer (36) 34) is transmitted to, or works as institute State the motors (42,46) of motor vehicle (10) during regenerating with generator operation mode operation when, the electric current be treat from Motor (42,46) is transmitted to the regenerative current of high voltage power supply (16,28) by high-voltage conducting wires (20,22,32,24).
6. motor vehicle (10) according to claim 3, wherein, the DC-DC converter (46) is designed for bidirectionally Transmission energy.
7. motor vehicle (10) according to claim 3, wherein, the only one intermediate circuit tool in two intermediate circuits (30) There is the joint (38) for connecting high voltage power supply (16,28) charger.
8. motor vehicle according to claim 3, wherein, at least one high voltage power supply (16,28) has in side to be used to incite somebody to action High voltage power supply (16,28) is connected between the joint (A2, A4) on circuit (18,30), and with use on opposed side Joint (A1, A3) in DC-DC converter (46), wherein, joint (A1, A2；A3, A4) it is electrically connected by inner lead (48-54) Connect.
9. motor vehicle (10) according to claim 1 or 2, wherein, the first high voltage supply system (12) is arranged on motor vehicle (10) front portion, the second high voltage supply system (14) is arranged on the rear portion of motor vehicle (10).
10. motor vehicle (10) according to claim 1 or 2, wherein, each high voltage power supply (16,28) includes a power electric Pond.
11. motor vehicle according to claim 1 or 2, wherein, the motor vehicle have two electronic motors (42, 46), the motor in described two motors is connected on the first intermediate circuit (18) by inverter (40), another Motor is connected on the second intermediate circuit (30) by inverter (44).
12. motor vehicle (10) according to claim 2, wherein, second high voltage power supply (28) and the second intermediate circuit (30) directly coupled in the case of no DC-DC converter.
13. motor vehicle (10) according to claim 3, wherein, the first high voltage power supply (16) and the second high voltage power supply (28) Mutually coupled by DC-DC converter (46).
CN201380022207.2A 2012-04-28 2013-04-19 Motor vehicle with high voltage supply system Active CN104302506B (en)

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DE102012008687.3A DE102012008687B4 (en) 2012-04-28 2012-04-28 Car with a high-voltage power supply system
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PCT/EP2013/001164 WO2013159887A1 (en) 2012-04-28 2013-04-19 Motor vehicle having a high-voltage power supply system

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